A brake includes a rotor rotatably coupled to a rotating body for rotation about a rotational axis. A brake plate and an armature are disposed on opposite sides of the rotor. A spring and an electromagnet urge the armature in opposite directions into and out of engagement with the rotor to move the rotor into and out of engagement with the brake plate and engage and disengage the brake. The brake plate and electromagnet each define a central bore configured to receive the rotating body. The brake is characterized by a target supported on a radially extending face of the rotating body or the rotor and a sensor aligned with the target through the central bore of the brake plate or the electromagnet. The sensor generates, responsive to the target, position signals indicative of a rotational position of the rotor and rotating body.
F16D 66/00 - Arrangements for monitoring working conditions of brakes, e.g. wear or temperature
F16D 55/02 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
F16D 121/22 - Electric or magnetic using electromagnets for releasing a normally applied brake
A rotational coupling includes a hub assembly configured for rotation about a rotational axis. The hub assembly includes a hub disposed about the axis and configured to receive a shaft and a disc extending radially outwardly from the hub. An armature and electromagnet are disposed on opposite axial sides of the disc. The electromagnet is fixed against rotation. A bearing is disposed between the hub and the electromagnet. The hub assembly and electromagnet are separated by an air gap on an outboard side of the bearing. A debris shield is axially aligned with, and extends across the radial length of, the air gap and, in some embodiments, is at least partially disposed within the air gap. The shield has a fixed end coupled to one of the hub assembly and electromagnet during assembly and a free end configured to engage the other through a spring force and/or electromagnetic attraction.
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F16D 27/14 - Magnetically-actuated clutchesControl or electric circuits therefor Details
3.
INSTALLATION TOOL FOR A ROTATIONAL COUPLING DEVICE AND METHOD OF INSTALLATION
A tool for installing a rotational coupling device on a shaft, a rotational coupling device and installation tool kit, and a method of installing a rotational coupling device are provided. The coupling device includes a hub disposed about an axis of the shaft and spaced from the shaft. A bore in the hub is aligned with a bore in the shaft and receives a fastener extending through the hub bore and into the shaft bore. The tool includes a body defining an aperture having a shape complementary to a shape of the hub and defining at least one flat and an arm extending from the body in a direction perpendicular to, and away from, the axis. At least a portion of the arm is axially spaced from the hub allowing the tool to access deeply recessed hubs and prevent rotation of the device and shaft as the fastener is rotated.
Installation Tool for a Rotational Coupling Device, Rotational Coupling Device and Installation Tool Kit and Method of Installing a Rotational Coupling Device
A tool for installing a rotational coupling device on a shaft, a rotational coupling device and installation tool kit, and a method of installing a rotational coupling device are provided. The coupling device includes a hub disposed about an axis of the shaft and spaced from the shaft. A bore in the hub is aligned with a bore in the shaft and receives a fastener extending through the hub bore and into the shaft bore. The tool includes a body defining an aperture having a shape complementary to a shape of the hub and defining at least one flat and an arm extending from the body in a direction perpendicular to, and away from, the axis. At least a portion of the arm is axially spaced from the hub allowing the tool to access deeply recessed hubs and prevent rotation of the device and shaft as the fastener is rotated.
A transmission system (10) includes a clutch assembly (20) having radially spaced input (18, 26) and output (16, 28) members, torque transmission members (30) therebetween, and a cage (32) retaining the torque transmission members. Rotation of the input member relative to the output member in a first direction engages the clutch assembly while rotation of the output member relative to the input member in the first direction disengages the clutch assembly. The clutch further includes a drag assembly (24) including a rotatable member (34) coupled to the cage (32) of the clutch assembly (20) and a fixed member (36). The rotatable member (34) rotates in the first direction relative to the fixed member, but rotation of the rotatable member (34) in a second direction relative to the fixed member (36) is limited thereby limiting rotation of the input member of the clutch assembly in the second direction.
F16D 41/067 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
6.
Disproportional drag actuation of an overrunning clutch
A clutch includes a clutch assembly having radially spaced input and output members, torque transmission members therebetween, and a cage retaining the torque transmission members. Rotation of the input member relative to the output member in a first direction engages the clutch assembly while rotation of the output member relative to the input member in the first direction disengages the clutch assembly. The clutch further includes a drag assembly including a rotatable member coupled to the cage of the clutch assembly and a fixed member. The rotatable member rotates in the first direction relative to the fixed member, but rotation of the rotatable member in a second direction relative to the fixed member is limited thereby limiting rotation of the input member of the clutch assembly in the second direction.
F16D 41/067 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
A bobbin wound coil for an electromagnetic coupling includes a bobbin having a cylindrical body disposed about a central axis, end flanges disposed at opposite axial ends of the cylindrical body and extending radially outwardly therefrom and each defining interior side facing the cylindrical body and an exterior side facing away from the cylindrical body and a terminal connector on an exterior side of one of the end flanges. In various embodiments, one or more of the cylindrical body, the end flanges and/or the terminal connector are formed to avoid the need for an exterior bulge on the end flange normally required to facilitate winding of the coil, enable drainage of fluids from pockets formed in an exterior side of an end flange, provide means for tensioning and/or securing the ends of the coil during winding, and/or prevent rotation of the bobbin relative to a field shell of the coupling.
A bobbin wound coil for an electromagnetic coupling includes a bobbin having a cylindrical body, end flanges disposed at opposite ends of the body and a terminal connector on an exterior side of one of the end flanges. A coil has a beginning portion extending through first openings in the terminal connector and an end flange and an end portion extending through second openings in the terminal connector an end flange. The second openings in the terminal connector and end flange are forward and rearward, respectively, of the corresponding first openings in a circumferential direction. A section of the beginning portion extends between the first openings in the terminal connector and end flange and a section of the end portion extends between the second openings in the terminal connector and end flange such that section of the end portion crosses over the section of the beginning portion.
A bobbin wound coil for an electromagnetic coupling includes a bobbin having a cylindrical body, end flanges disposed at opposite ends of the body and a terminal connector defining a central cavity bordered, in part, by inner and outer walls and a side wall extending between the inner and outer walls. A coil has a beginning portion extending through first openings in the inner and outer walls, an end portion extending through second openings in the inner and outer walls, and a center portion wound about the bobbin body. The first and second openings in the inner wall divide the inner wall into first and second circumferential end sections and a center section. A portion of one of the circumferential end sections and the center section is spaced from the side wall to define a recess configured to receive one of the beginning and end portions of the coil.
A bobbin wound coil for an electromagnetic coupling includes a bobbin having a cylindrical body disposed about a central axis, end flanges disposed at each axial end of the body and a terminal connector on an exterior side of one of the end flanges. The terminal connector includes a body defining a central cavity and a post extending from an exterior surface of the body of the terminal connector. A coil includes a beginning portion extending through the body of the terminal connector and the end flange on which the terminal connector is located, an end portion extending through the body of the terminal connector and the end flange, and a center portion extending between the beginning portion and the end portion and wound about the cylindrical body of the bobbin. One of the beginning portion and the end portion of the coil is wound about the post.
A power take-off includes bell housing disposed about an axis and configured for coupling to a housing of an engine or other driving device at a first axial end and to a housing of a driven device at a second axial end. The bell housing defines an air inlet port and an air outlet port between the first and second axial ends. A clutch is disposed within the bell housing and configured to transfer torque from an input member coupled to the engine to an output member coupled to the driven device. A fan is configured for rotation with the input member to draw air into the bell housing through the air inlet port, move air through the bell housing from the air inlet port to the air outlet port in a substantially radial direction across the clutch and exhaust air from the bell housing through the air outlet port.
A power take-off includes bell housing disposed about an axis and configured for coupling to a housing of an engine or other driving device at a first axial end and to a housing of a driven device at a second axial end. The bell housing defines an air inlet port and an air outlet port between the first and second axial ends. A clutch is disposed within the bell housing and configured to transfer torque from an input member coupled to the engine to an output member coupled to the driven device. A fan is configured for rotation with the input member to draw air into the bell housing through the air inlet port, move air through the bell housing from the air inlet port to the air outlet port in a substantially radial direction across the clutch and exhaust air from the bell housing through the air outlet port.
B60K 17/28 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F01P 1/06 - Arrangements for cooling other engine or machine parts
A brake and method of assembly are provided. The brake includes a friction plate configured for coupling to a rotatable body for rotation with the rotatable body about an axis of rotation, a pressure plate disposed about the axis on a first side of the friction plate and fixed against rotation, and an armature plate disposed about the axis on a second side of the friction plate. An electromagnet is disposed about the axis on an opposite side of the armature plate relative to the friction plate. A spring biases the armature plate in a first axial direction towards the friction plate and away from the electromagnet to engage the brake. A fastener couples the pressure plate to the electromagnet. The fastener conforms to a space between opposed surfaces of the pressure plate and the electromagnet and, upon hardening, bonds the pressure plate to the electromagnet.
F16D 59/02 - Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
A mobile lift device (10) includes a body (12) supported on a driven wheel (14) and a lift (16) supported by the body and configured for vertical movement relative to the body. The lift is configured to support a load. An electric drive motor (20) is configured to cause rotation of the driven wheel and a drive motor brake (22) is coupled to the motor. An electromechanical linear actuator (26) is configured to raise and lower the lift and includes an electric actuator motor. A controller (30) is configured to determine the weight of the load. In one embodiment, the controller determines the weight by determining a level of current required by the electric actuator motor. The controller controls at least one of the electric drive motor and the drive motor brake responsive to the weight of the load.
A rotational coupling includes a rotor configured for rotation about a rotational axis. The rotor includes a hub disposed about the axis and configured to receive a shaft and a disc extending radially outwardly from the hub. An armature and electromagnet are disposed on opposite axial sides of the disc. The electromagnet is fixed against rotation. A bearing is disposed between the hub and the electromagnet. The hub and electromagnet engage the inner and outer races, respectively of the bearing on opposite axial sides of the bearing. A spacer is disposed radially inwardly of the electromagnet and engages the inner race of the bearing on the same axial side of the bearing as the electromagnet. An air gap separates the spacer from the electromagnet. A shield is supported by the spacer and extends radially outwardly therefrom such that a portion of the shield is axially aligned with the air gap.
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F16D 27/14 - Magnetically-actuated clutchesControl or electric circuits therefor Details
A rotational coupling includes a rotor configured for rotation about a rotational axis. The rotor includes a hub disposed about the axis and configured to receive a shaft and a disc extending radially outwardly from the hub. An armature and electromagnet are disposed on opposite axial sides of the disc. The electromagnet is fixed against rotation. A bearing is disposed between the hub and the electromagnet. The hub and electromagnet engage the inner and outer races, respectively of the bearing on opposite axial sides of the bearing. A spacer is disposed radially inwardly of the electromagnet and engages the inner race of the bearing on the same axial side of the bearing as the electromagnet. An air gap separates the spacer from the electromagnet. A shield is supported by the spacer and extends radially outwardly therefrom such that a portion of the shield is axially aligned with the air gap.
F16D 27/12 - Clutch systems with a plurality of electromagnetically-actuated clutches
F16D 27/14 - Magnetically-actuated clutchesControl or electric circuits therefor Details
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F16D 27/00 - Magnetically-actuated clutchesControl or electric circuits therefor
17.
ROTATIONAL COUPLING DEVICE WITH FLUX CONDUCTING BEARING SHIELD
A rotational coupling (10) includes a rotor (34) configured for rotation about a rotational axis (36). The rotor (34) includes a hub (38) disposed about the axis (36) and configured to receive a shaft (12) and a disc (40) extending radially outwardly from the hub (38). An armature (26) and electromagnet (24) are disposed on opposite axial sides of the disc (40). The electromagnet (24) is fixed against rotation. A bearing (20) is disposed between the hub (38) and the electromagnet (24). The hub (38) and electromagnet (24) engage the inner and outer races, respectively of the bearing (20) on opposite axial sides of the bearing (20). A spacer (16) is disposed radially inwardly of the electromagnet (24) and engages the inner race of the bearing (20) on the same axial side of the bearing (20) as the electromagnet (24). An air gap (48) separates the spacer (16) from the electromagnet (24). A shield (34) is supported by the spacer (16) and extends radially outwardly therefrom such that a portion of the shield (34) is axially aligned with the air gap (48).
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
A brake and method of assembly are provided. The brake includes a friction plate configured for coupling to a rotatable body for rotation with the rotatable body about an axis of rotation, a pressure plate disposed about the axis on a first side of the friction plate and fixed against rotation, and an armature plate disposed about the axis on a second side of the friction plate. An electromagnet is disposed about the axis on an opposite side of the armature plate relative to the friction plate. A spring biases the armature plate in a first axial direction towards the friction plate and away from the electromagnet to engage the brake. A fastener couples the pressure plate to the electromagnet. The fastener conforms to a space between opposed surfaces of the pressure plate and the electromagnet and, upon hardening, bonds the pressure plate to the electromagnet.
F16D 59/02 - Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
A brake and method of assembly are provided. The brake includes a friction plate configured for coupling to a rotatable body for rotation with the rotatable body about an axis of rotation, a pressure plate disposed about the axis on a first side of the friction plate and fixed against rotation, and an armature plate disposed about the axis on a second side of the friction plate. An electromagnet is disposed about the axis on an opposite side of the armature plate relative to the friction plate. A spring biases the armature plate in a first axial direction towards the friction plate and away from the electromagnet to engage the brake. A fastener couples the pressure plate to the electromagnet. The fastener conforms to a space between opposed surfaces of the pressure plate and the electromagnet and, upon hardening, bonds the pressure plate to the electromagnet.
B60T 1/06 - Arrangements of braking elements, i.e. of those parts where braking effect occurs acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission
F16D 59/02 - Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
20.
ROTATIONAL COUPLING DEVICE WITH ARMATURE RELEASE COLLAR
A rotational coupling device includes an armature configured for coupling to a shaft for rotation with the shaft about an axis, but axially movable relative to the shaft. An electromagnet assembly is disposed on one side of the armature and fixed against rotation. A collar is disposed on the opposite side of the armature. The collar is configured for rotation with the shaft, but fixed against axial movement relative to the shaft and includes a permanent magnet. When a current having a first polarity is provided to the electromagnet assembly, the armature moves in one axial direction into engagement with a member of the coupling device to transmit a torque between the member and the armature. The permanent magnet urges the armature in the opposite axial direction to disengage the armature from the member when the current is not provided to the electromagnet assembly.
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
21.
Rotational coupling device with armature release collar
A rotational coupling device includes an armature configured for coupling to a shaft for rotation with the shaft about an axis, but axially movable relative to the shaft. An electromagnet assembly is disposed on one side of the armature and fixed against rotation. A collar is disposed on the opposite side of the armature. The collar is configured for rotation with the shaft, but fixed against axial movement relative to the shaft and includes a permanent magnet. When a current having a first polarity is provided to the electromagnet assembly, the armature moves in one axial direction into engagement with a member of the coupling device to transmit a torque between the member and the armature. The permanent magnet urges the armature in the opposite axial direction to disengage the armature from the member when the current is not provided to the electromagnet assembly.
F16D 27/06 - Magnetically-actuated clutchesControl or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings with axially-movable friction surfaces with friction surfaces arranged within the flux
F16D 48/06 - Control by electric or electronic means, e.g. of fluid pressure
H02K 7/108 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction clutches
H02K 7/102 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
F16D 27/00 - Magnetically-actuated clutchesControl or electric circuits therefor
A fluid pump for a linear actuator causes a rod in the actuator to extend or retract by controlling fluid flow to and from portions of a fluid chamber on either side of a piston disposed within the fluid chamber and supporting the rod. The pump includes check valves that control fluid flow between a driven pump element and each portion of the fluid chamber and a shuttle movable in response to fluid pressure along a shuttle axis extending through the valves. At least one valve includes a valve member movable between a closed position and an open position defining a fluid flow path between the driven pump element and fluid chamber and means for limiting movement of the shuttle towards the valve such that the shuttle may, depending on the position of the limiting means, move the valve member to an intermediate position between the closed and open positions.
F15B 11/05 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
23.
THREE POSITION METERING VALVE FOR A SELF-CONTAINED ELECTRO-HYDRAULIC ACTUATOR
A fluid pump for a linear actuator causes a rod in the actuator to extend or retract by controlling fluid flow to and from portions of a fluid chamber on either side of a piston disposed within the fluid chamber and supporting the rod. The pump includes check valves that control fluid flow between a driven pump element and each portion of the fluid chamber and a shuttle movable in response to fluid pressure along a shuttle axis extending through the valves. At least one valve includes a valve member movable between a closed position and an open position defining a fluid flow path between the driven pump element and fluid chamber and means for limiting movement of the shuttle towards the valve such that the shuttle may, depending on the position of the limiting means, move the valve member to an intermediate position between the closed and open positions.
F15B 15/18 - Combined units comprising both motor and pump
F04C 2/18 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
F04C 14/24 - Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
An electromagnetic brake is provided in which short duration current pulses move the brake between engaged and disengaged states. A first current pulse having a first polarity is delivered to a conductor within a field shell when the brake is engaged and establishes an electromagnetic circuit including the field shell and an armature plate that urges the armature plate away from a rotating friction plate and towards the field shell to disengage the brake. A magnetic circuit is maintained after termination of the first current pulse due to a remanence in at least one of the armature plate and the field shell. A second current pulse having a second polarity opposite the first polarity delivered to the conductor when the brake is disengaged weakens the magnetic circuit thereby allowing a spring to move the armature plate away from the field shell and towards the friction plate to engage the brake.
F16D 55/02 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
F16D 55/22 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
An electromagnetic brake is provided in which short duration current pulses move the brake between engaged and disengaged states. A first current pulse having a first polarity is delivered to a conductor within a field shell when the brake is engaged and establishes an electromagnetic circuit including the field shell and an armature plate that urges the armature plate away from a rotating friction plate and towards the field shell to disengage the brake. A magnetic circuit is maintained after termination of the first current pulse due to a remanence in at least one of the armature plate and the field shell. A second current pulse having a second polarity opposite the first polarity delivered to the conductor when the brake is disengaged weakens the magnetic circuit thereby allowing a spring to move the armature plate away from the field shell and towards the friction plate to engage the brake.
F16D 55/02 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
F16D 55/22 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
An electromagnetic brake is provided in which short duration current pulses move the brake between engaged and disengaged states. A first current pulse having a first polarity is delivered to a conductor within a field shell when the brake is engaged and establishes an electromagnetic circuit including the field shell and an armature plate that urges the armature plate away from a rotating friction plate and towards the field shell to disengage the brake. A magnetic circuit is maintained after termination of the first current pulse due to a remanence in at least one of the armature plate and the field shell. A second current pulse having a second polarity opposite the first polarity delivered to the conductor when the brake is disengaged weakens the magnetic circuit thereby allowing a spring to move the armature plate away from the field shell and towards the friction plate to engage the brake.
F16D 63/00 - Brakes not otherwise provided forBrakes combining more than one of the types of groups
F16D 55/30 - Brakes with only one rotating disc mechanically actuated
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
A brake (10) is provided that employs an electromagnetic or magnetic circuit to disengage the brake and in which a reed switch (26) is used to indicate an operating condition of the brake. The reed switch (26) is positioned across an air gap between two members (18, 22) of the electromagnetic or magnetic circuit. The state of the reed switch changes in response to flux leakage at the air gap and may be used to monitor for potential failures in the operation of the brake including a failure to operate due a lack of current or the failure of the brake to disengage due to an obstruction.
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
28.
ROTATIONAL COUPLING DEVICE HAVING MEANS FOR SEALING THE INTERFACE BETWEEN THE ARMATURE AND THE ELECTROMAGNET
A rotational coupling device (10) includes a rotor (12) configured for rotation about a rotational axis, a brake plate (14) disposed on a first axial side of the rotor, an armature (16) disposed on a second axial side of the rotor opposite the brake plate, and an electromagnet (20) disposed on one axial side of the armature opposite the rotor and the brake plate. A spacer (22) is disposed axially between the brake plate and the electromagnet and radially outwardly of the rotor and the armature. A seal (24) is supported on a radially inner surface of the spacer radially outward of the armature and seals the interface between armature and electromagnet.
F16D 55/02 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
F16D 59/02 - Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
29.
Rotational coupling device having means for sealing the interface between the armature and the electromagnet
A rotational coupling device includes a rotor configured for rotation about a rotational axis, a brake plate disposed on a first axial side of the rotor, an armature disposed on a second axial side of the rotor opposite the brake plate, and an electromagnet disposed on one axial side of the armature opposite the rotor and the brake plate. A spacer is disposed axially between the brake plate and the electromagnet and radially outwardly of the rotor and the armature. A seal is supported on a radially inner surface of the spacer radially outward of the armature and seals the interface between armature and electromagnet.
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
F16D 55/02 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
A clutch includes inner and outer races, each with pluralities of teeth. A pawl is supported on the inner race and a shift ring disposed outward of the pawl defines pawl engagement surfaces on an inner perimeter. Pins engage cam surfaces formed in the ring and outer race. When the inner race rotates faster than the outer race, the pawl engages the ring causing relative movement between the ring and outer race that moves the pins radially inward along the cam surfaces to locate the pins between corresponding teeth on the races and rotatably couple the races. When the outer race rotates faster than the inner race, the ring moves relative to the outer race and the pins move radially outward along the cam surfaces away from the corresponding teeth to uncouple the races, disengage the ring from the pawl and allow the outer race to overrun the inner race.
F16D 41/064 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
F16D 41/08 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
F16D 41/12 - Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
F16D 41/16 - Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the action being reversible
A clutch includes inner and outer races, each with pluralities of teeth. A pawl is supported on the inner race and a shift ring disposed outward of the pawl defines pawl engagement surfaces on an inner perimeter. Pins engage cam surfaces formed in the ring and outer race. When the inner race rotates faster than the outer race, the pawl engages the ring causing relative movement between the ring and outer race that moves the pins radially inward along the cam surfaces to locate the pins between corresponding teeth on the races and rotatably couple the races. When the outer race rotates faster than the inner race, the ring moves relative to the outer race and the pins move radially outward along the cam surfaces away from the corresponding teeth to uncouple the races, disengage the ring from the pawl and allow the outer race to overrun the inner race.
F16D 41/12 - Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
F16D 41/064 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
F16D 41/08 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
F16D 41/16 - Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the action being reversible
A clutch includes inner and outer races, each with pluralities of teeth. A pawl is supported on the inner race and a shift ring disposed outward of the pawl defines pawl engagement surfaces on an inner perimeter. Pins engage cam surfaces formed in the ring and outer race. When the inner race rotates faster than the outer race, the pawl engages the ring causing relative movement between the ring and outer race that moves the pins radially inward along the cam surfaces to locate the pins between corresponding teeth on the races and rotatably couple the races. When the outer race rotates faster than the inner race, the ring moves relative to the outer race and the pins move radially outward along the cam surfaces away from the corresponding teeth to uncouple the races, disengage the ring from the pawl and allow the outer race to overrun the inner race.
F16D 23/10 - Arrangements for synchronisation automatically producing the engagement of the clutch when the clutch members are moving at the same speedIndicating synchronisation
F16D 11/06 - Clutches in which the members have interengaging parts disengaged by a contact of a part mounted on the clutch with a stationarily-mounted member with clutching members movable otherwise than only axially, e.g. rotatable keys
F16D 43/202 - Internally controlled automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type
F16D 41/064 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
F16D 41/08 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
F16D 41/16 - Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the action being reversible
F16D 23/12 - Mechanical clutch-actuating mechanisms arranged outside the clutch as such
34.
ROTATIONAL COUPLING DEVICE WITH NON-CONTACT ANTI-ROTATION MECHANISM
A rotational coupling (10) includes a coupling disc (38) configured to be disposed about a shaft (12) having a rotational axis (34). An electromagnet assembly (24) on one side of the coupling disc (38) includes a housing (50) and a conductor (66) within the housing (50). An armature (26) is disposed on an opposite side of the coupling disc (38) opposite the conductor (66) and the coupling disc (38), electromagnet assembly (24) and armature (26) form an electromagnetic circuit when current is supplied to the conductor (66) to urge the armature (26) towards engagement with the coupling disc (38). An anti-rotation mechanism (32) for the electromagnet assembly (24) includes one or more coupling permanent magnets (78) and one or more fixed permanent magnets (80) configured to be mounted to an outer surface of the housing (50) of the electromagnet assembly (24) and a fixed support structure (76), respectively. The coupling and fixed permanent magnets (78; 80) are arranged to inhibit movement of the coupling permanent magnets (78) and electromagnet assembly (24) in either rotational direction about the rotational axis (34).
F16D 27/00 - Magnetically-actuated clutchesControl or electric circuits therefor
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F16D 27/06 - Magnetically-actuated clutchesControl or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings with axially-movable friction surfaces with friction surfaces arranged within the flux
35.
Electromagnetic brake for a power transmission assembly
An electromagnetic brake includes a hub disposed about a shaft and configured for rotation with the shaft about a rotational axis. An electromagnet assembly is fixed against rotation about the axis and includes a housing defining axially extending, radially spaced inner and outer poles and a brake plate extending radially therebetween. A conductor is disposed between the poles on one side of the brake plate. An armature is disposed on the other side of the brake plate and coupled to a body driven by the shaft. The electromagnet assembly, armature and hub form an electromagnetic circuit when the conductor is energized urging the armature towards the brake plate. A portion of the magnetic flux in the circuit travels radially inwardly across a first radial air gap from the inner pole to the hub and then radially outwardly across a second radial air gap from the hub to the brake plate.
An electromagnetic brake (34) includes a hub (48) disposed about a shaft and configured for rotation with the shaft about a rotational axis (38). An electromagnet assembly is fixed against rotation about the axis (38) and includes a housing (64) defining axially extending, radially spaced inner (74) and outer (78) poles and a brake plate (80) extending radially therebetween. A conductor (66) is disposed between the poles on one side of the brake plate (80). An armature (96) is disposed on the other side of the brake plate (80) and coupled to a body driven by the shaft. The electromagnet assembly, armature (96) and hub (48) form an electromagnetic circuit when the conductor (66) is energized urging the armature (96) towards the brake plate (80). A portion of the magnetic flux in the circuit travels radially inwardly across a first radial air gap from the inner pole (74) to the hub (48) and then radially outwardly across a second radial air gap from the hub (48) to the brake plate (80).
A rotational coupling includes a coupling disc configured to be disposed about a shaft having a rotational axis. An electromagnet assembly on one side of the coupling disc includes a housing and a conductor within the housing. An armature is disposed on an opposite side of the coupling disc opposite the conductor and the coupling disc, electromagnet assembly and armature form an electromagnetic circuit when current is supplied to the conductor to urge the armature towards engagement with the coupling disc. An anti-rotation mechanism for the electromagnet assembly includes one or more coupling permanent magnets and one or more fixed permanent magnets configured to be mounted to an outer surface of the housing of the electromagnet assembly and a fixed support structure, respectively. The coupling and fixed permanent magnets are arranged to inhibit movement of the coupling permanent magnets and electromagnet assembly in either rotational direction about the rotational axis.
A fluid pump for a linear actuator is provided. The pump causes a rod in the actuator to extend or retract by controlling the flow of fluid to and from portions of a fluid chamber on either side of a piston disposed within the fluid chamber and supporting the rod. The pump includes a valve structure that enables the pump to redistribute fluid obtained from one portion of the fluid chamber on one side of the piston to the other portion of the fluid chamber on the other side of the piston without first returning the fluid to a fluid reservoir thereby increasing the efficiency of the pump.
F04C 14/04 - Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible machines or pumps
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
F04C 2/18 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
F15B 15/18 - Combined units comprising both motor and pump
F15B 13/01 - Locking-valves or other detent devices
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
39.
A BRAKE WITH A REED SWITCH FOR INDICATING AN OPERATING CONDITION OF THE BRAKE
A brake is provided that employs an electromagnetic or magnetic circuit to disengage the brake and in which a reed switch (26) is used to indicate an operating condition of the brake. The reed switch (26) is positioned across an air gap between two members of the electromagnetic or magnetic circuit. The reed switch is oriented such that a longitudinal axis (54) of the reed switch extends in a direction other than parallel to one or both of (i) the axis of rotation ( 28) for rotating components of the brake and (ii) a direction of a magnetic force at a point in the air gap where the magnetic force is greatest.
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
40.
A BRAKE WITH A REED SWITCH FOR INDICATING AN OPERATING CONDITION OF THE BRAKE
A brake is provided that employs an electromagnetic or magnetic circuit to disengage the brake and in which a reed switch (26) is used to indicate an operating condition of the brake. The reed switch (26) is positioned across an air gap between two members of the electromagnetic or magnetic circuit. The reed switch is oriented such that a longitudinal axis (54) of the reed switch extends in a direction other than parallel to one or both of (i) the axis of rotation ( 28) for rotating components of the brake and (ii) a direction of a magnetic force at a point in the air gap where the magnetic force is greatest.
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
A rotational coupling device drives an output synchronous with either of two inputs. The device includes a hub disposed about an axis and an output member supported on the hub for rotation about the axis. First and second input members disposed about the hub are configured to rotate in first and second rotational directions and at first and second speeds, respectively, with at least one of the directions and speeds differing. A clutch member is disposed axially between the input members and coupled to the output member. An electromagnet is on an opposite side of the second input member relative to the clutch member. When the electromagnet is deenergized, the clutch member engages the first input member and the output member rotates with the first input member. When the electromagnet is energized, the clutch member engages the second input member and the output member rotates with the second input member.
F16D 27/10 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
F16D 27/11 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with conical friction surfaces, e.g. cone clutches
F16H 63/30 - Constructional features of the final output mechanisms
F16D 13/76 - Friction clutches specially adapted to incorporate with other transmission parts, i.e. at least one of the clutch parts also having another function, e.g. being the disc of a pulley
F16D 27/04 - Magnetically-actuated clutchesControl or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings with axially-movable friction surfaces
F16D 21/04 - Systems comprising a plurality of mechanically-actuated clutches for interconnecting three or more shafts or other transmission members in different ways with a shaft carrying a number of rotatable transmission members, e.g. gears, each of which can be connected to the shaft by a clutching member or members between the shaft and the hub of the transmission member
F16D 27/108 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F16D 27/12 - Clutch systems with a plurality of electromagnetically-actuated clutches
42.
ROTATIONAL COUPLING DEVICE FOR BIMODAL SELECTIVE OUTPUT
A rotational coupling device (10) drives an output (14) synchronous with either of two inputs (22, 24). The device (10) includes a hub (12) disposed about an axis (34) and an output member (14) supported on the hub (12) for rotation about the axis (34). First and second input members (22, 24) disposed about the hub (12) are configured to rotate in first and second rotational directions and at first and second speeds, respectively, with at least one of the directions and speeds differing. A clutch member (26) is disposed axially between the input members (22, 24) and coupled to the output member (14). An electromagnet (32 ) is on an opposite side of the second input member (24) relative to the clutch member (26). When the electromagnet (32) is deenergized, the clutch member (26) engages the first input member (22) and the output member (14) rotates with the first input member (22). When the electromagnet (32) is energized, the clutch member (26) engages the second input member (24) and the output member (14) rotates with the second input member (24).
A fluid pump for a linear actuator, the linear actuator comprising a rod that extends or retracts by controlling the flow of fluid to and from portions of a fluid chamber on either side of a piston disposed within the fluid chamber and supporting the rod. The pump is of the rotary type and reversible and includes a valve structure comprising a first and second check valve (98,100) and a first and second shuttle (92,102) that enables the pump to redistribute fluid obtained from one portion of the fluid chamber on one side of the piston to the other portion of the fluid chamber on the other side of the piston without first returning the fluid to a fluid reservoir thereby increasing the efficiency of the pump.
F04C 2/18 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
F04C 14/04 - Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible machines or pumps
F15B 15/18 - Combined units comprising both motor and pump
A fluid pump for a linear actuator, the linear actuator comprising a rod that extends or retracts by controlling the flow of fluid to and from portions of a fluid chamber on either side of a piston disposed within the fluid chamber and supporting the rod. The pump is of the rotary type and reversible and includes a valve structure comprising a first and second check valve (98,100) and a first and second shuttle (92,102) that enables the pump to redistribute fluid obtained from one portion of the fluid chamber on one side of the piston to the other portion of the fluid chamber on the other side of the piston without first returning the fluid to a fluid reservoir thereby increasing the efficiency of the pump.
F04C 2/18 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
F04C 14/04 - Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible machines or pumps
F15B 15/18 - Combined units comprising both motor and pump
46.
Brake with a reed switch for indicating an operating condition of the brake
A brake is provided that employs an electromagnetic or magnetic circuit to disengage the brake and in which a reed switch is used to indicate an operating condition of the brake. The reed switch is positioned across an air gap between two members of the electromagnetic or magnetic circuit. The reed switch is oriented such that a longitudinal axis of the reed switch extends in a direction other than parallel to one or both of (i) the axis of rotation for rotating components of the brake and (ii) a direction of a magnetic force at a point in the air gap where the magnetic force is greatest.
F16D 55/02 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
A fluid pump for a linear actuator is provided. The pump causes a rod in the actuator to extend or retract by controlling the flow of fluid to and from portions of a fluid chamber on either side of a piston disposed within the fluid chamber and supporting the rod. The pump includes a valve structure that enables the pump to redistribute fluid obtained from one portion of the fluid chamber on one side of the piston to the other portion of the fluid chamber on the other side of the piston without first returning the fluid to a fluid reservoir thereby increasing the efficiency of the pump.
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
F04C 2/18 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
F04C 14/04 - Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible machines or pumps
F15B 15/18 - Combined units comprising both motor and pump
F15B 13/01 - Locking-valves or other detent devices
A liquid cooled brake is provided having an improved housing that provides strong yet lightweight structural support. The brake includes end plates disposed about a driven shaft and axially spaced from one another. A plurality of axially extending pins connect the end plates. A friction plate is coupled to the driven shaft for rotation therewith and is axially movable relative to the driven shaft. Another friction plate defines a fluid jacket and is coupled to the pins. The friction plate is fixed against rotation, but axially movable, relative to the pins. A pressure plate is configured for selective movement towards the friction plates. Support columns are disposed radially outwardly of each pin and fixed to the end plates The support columns prevent undue strain on the pins. Ventilated guards may also be located between each pair of columns to limit access to internal working components of the brake.
F16D 55/36 - Brakes with a plurality of rotating discs all lying side by side
F16D 65/853 - Features relating to cooling for disc brakes with closed cooling system
F16D 55/42 - Brakes with a plurality of rotating discs all lying side by side actuated by a fluid-pressure device arranged in or on the brake comprising an expansible fluid-filled flexible member coaxial with the brake
F16D 65/847 - Features relating to cooling for disc brakes with open cooling system, e.g. cooled by air
A bi-directional clutch (10) is provided having inner (22) and outer (24) members disposed about a rotational axis (36). One or more pawls (28) are coupled to one of the members (22, 24) and configured for rotation about separate rotational axes (66). One end of each pawl (28) moves between first and second engagement positions with corresponding engagement surfaces (62, 64) formed in the other member and a position of disengagement with the other member permitting relative rotation of the inner (22) and outer (24) members. A pair of magnets (30A, 30B) are disposed at the opposite end of each pawl (28) with each magnet (30A, 30B) in the pair defining a pole adjacent the end of the pawl (28) and the poles having opposite polarity. An electromagnetic actuator (32) selectively generates electromagnetic fields of different polarities to urge the pawls (28) away from the position of disengagement to one of the engagement positions to cause rotation of the other member (22, 24) in either rotational direction.
A bi-directional clutch (10) is provided having inner (22) and outer (24) members disposed about a rotational axis (36). One or more pawls (28) are coupled to one of the members (22, 24) and configured for rotation about separate rotational axes (66). One end of each pawl (28) moves between first and second engagement positions with corresponding engagement surfaces (62, 64) formed in the other member and a position of disengagement with the other member permitting relative rotation of the inner (22) and outer (24) members. A pair of magnets (30A, 30B) are disposed at the opposite end of each pawl (28) with each magnet (30A, 30B) in the pair defining a pole adjacent the end of the pawl (28) and the poles having opposite polarity. An electromagnetic actuator (32) selectively generates electromagnetic fields of different polarities to urge the pawls (28) away from the position of disengagement to one of the engagement positions to cause rotation of the other member (22, 24) in either rotational direction.
A bi-directional clutch is provided having inner and outer members disposed about a rotational axis. One or more pawls are coupled to one of the members and configured for rotation about separate rotational axes. One end of each pawl moves between first and second engagement positions with corresponding engagement surfaces formed in the other member and a position of disengagement with the other member permitting relative rotation of the inner and outer members. A pair of magnets are disposed at the opposite end of each pawl with each magnet in the pair defining a pole adjacent the end of the pawl and the poles having opposite polarity. An electromagnetic actuator selectively generates electromagnetic fields of different polarities to urge the pawls away from the position of disengagement to one of the engagement positions to cause rotation of the other member in either rotational direction.
F16D 41/16 - Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the action being reversible
F16D 41/12 - Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
F16D 27/10 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
F16D 27/00 - Magnetically-actuated clutchesControl or electric circuits therefor
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Clutches and brakes for industrial machines. Sensors, namely magnetic, inductive, capacitive,
photo-electric, rotary, load cell, and ultrasonic sensors;
switches, namely, limit switches, foot switches, cable pull
switches, magnetic switches and interlock switches; and
tension control systems, primarily consisting of sensors,
switches, brakes, clutches, power supplies and electronic
controls. Clutches and brakes for vehicles.
53.
Pin and pawl style bi-directional overrunning clutch
An overrunning clutch is provided having inner and outer members disposed about a rotational axis with the outer member radially outward of the inner member. The clutch further includes a plurality of pins projecting from one of a radially inner surface of the outer member and a radially outer surface of the inner member. The clutch further includes one or more pawls coupled to one of the inner and outer members. Each of the pawls is movable between an engagement position wherein the pawl is engaged with one of the pins to transmit torque between the inner and outer members and a disengagement position wherein the pawl is disengaged from the pin to permit relative rotation of the inner and outer members. In one embodiment, different pawls assume their respective engagement position depending on the rotational direction of the one member.
An overrunning clutch is provided having inner and outer members disposed about a rotational axis with the outer member radially outward of the inner member. The clutch further includes a plurality of pins projecting from one of a radially inner surface of the outer member and a radially outer surface of the inner member. The clutch further includes one or more pawls coupled to one of the inner and outer members. Each of the pawls is movable between an engagement position wherein the pawl is engaged with one of the pins to transmit torque between the inner and outer members and a disengagement position wherein the pawl is disengaged from the pin to permit relative rotation of the inner and outer members. In one embodiment, different pawls assume their respective engagement position depending on the rotational direction of the one member.
A rotational coupling (10) device is provided having an improved actuator for compressing friction discs coupled to an input ring and an output hub disposed about a rotational axis. The actuator (22) includes a pole structure (46) and a field shell (44) housing a conductor (58), each with aligned, axially extending, radially spaced inner and outer poles. An armature (48) is coupled for rotation with the input ring, but axially movable relative thereto and axially aligned with an end wall of the pole structure extending between the inner and outer actuator poles. First and second axially spaced actuator discs (50, 52) are disposed radially between the pole structure (46) and the output hub (12) with the first actuator disc (50) rotatably coupled to the pole structure (46). The discs define cam surfaces along which a plurality of balls (54) move to expand and contract the actuator discs (50, 52) upon relative rotation of the actuator discs.
F16D 27/115 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
56.
Rotational coupling device with improved actuator assembly
A rotational coupling device is provided having an improved actuator for compressing friction discs coupled to an input ring and an output hub disposed about a rotational axis. The actuator includes a pole structure and a field shell housing a conductor, each with aligned, axially extending, radially spaced inner and outer poles. An armature is coupled for rotation with the input ring, but axially movable relative thereto and axially aligned with an end wall of the pole structure extending between the inner and outer actuator poles. First and second axially spaced actuator discs are disposed radially between the pole structure and the output hub with the first actuator disc rotatably coupled to the pole structure. The discs define cam surfaces along which a plurality of balls move to expand and contract the actuator discs upon relative rotation of the actuator discs.
A rotational coupling device is configured for vertical orientation. The device includes a hub disposed about a rotational axis. A rotor is supported on, and configured for rotation about, the hub and defines a radially extending wall. An armature is supported on the hub for rotation therewith and axially spaced from the wall. Clutch plates are disposed between the rotor wall and armature and rotatably coupled to the rotor or armature. A field shell is disposed on an opposite side of the rotor wall from the armature and houses a conductor. The armature and clutch plates move in a first axial direction towards the rotor wall when the conductor is energized and in a second axial direction when the conductor is subsequently deenergized. At least one of the hub and rotor defines means for limiting movement of a corresponding one of the clutch plates in the second axial direction.
F16D 27/115 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
A rotational coupling device is provided with an integrated rotor and brake disc to simplify design of the device and remove liquids from the device when used in a wet environment. The rotor is configured for rotation about a rotating hub and includes a first member defining one pole of the rotor and a second member defining a second pole of the rotor and a braking surface. The second member is coupled to the first member, but axially movable relative to the first member. During clutch engagement, an electromagnetic circuit used to engage the clutch urges the second member into engagement with the first member for rotation. When the clutch is disengaged, the second member disengages from the first member to create a fluid flow path between the members and engages a brake plate to halt rotation of the rotor.
F16D 27/115 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
F16D 55/36 - Brakes with a plurality of rotating discs all lying side by side
A rotational coupling device is provided in which an armature (30) affixed to a hub (22) rotating about a rotational axis is drawn in a first axial direction towards a rotor (26) disposed about, and rotatable relative to, the hub upon energization of an electromagnetic circuit including the rotor, the armature and a field shell housing (48) a conductor (50) to cause frictional engagement of clutch plates (36, 40, 34) affixed to the rotor and hub and rotatably couple the rotor and hub. In accordance with one aspect of the invention, the rotor and/or hub may include means (90, 92, 94, 156, 158, 160) for limiting movement of the clutch plates in a second axial direction to maintain spacing between the clutch plates. In another aspect, the rotor may be made from multiple members and one member (164) may provide both a pole forming part of the circuit and a braking surface (172) configured to engage a brake plate (52) in the device upon deenergization of the circuit. In another aspect, the rotor may define a chamber (134) in which the armature and clutch plates are disposed that defines a sump containing a fluid with the field shell and conductor isolated from the fluid. In yet another aspect, the device may include means, such as a tube (44, 46) having one end submerged in the fluid and extending through an aperture (180) in the armature, for transporting fluid from the sump to the clutch plates.
F16D 27/115 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
F16D 13/69 - Arrangements for spreading lamellae in released state
60.
Rotational coupling device with improved lubrication
A rotational coupling device having improved lubrication is provided. The device includes a hub disposed about a rotational axis. A rotor is supported on, and configured for rotation about, the hub and defines a radially extending wall and a chamber on one side of the wall surrounding said hub and defining a sump containing a fluid. An armature is supported on the hub for rotation therewith within the chamber and axially spaced from the wall. Clutch plates are disposed between the rotor wall and armature and rotatably coupled to the rotor or armature. A field shell is disposed on an opposite side of the rotor wall from the armature and houses a conductor. One or more tubes have an end submerged in the fluid and extend through apertures in the armature. Rotation of said armature draws fluid through the tubes and onto the clutch plates.
F16D 27/115 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
A rotational coupling device having a self-contained wet clutch pack and fluid isolated field shell is provided. The device includes a hub disposed about a rotational axis. A rotor is supported on, and configured for rotation about, the hub and defines a radially extending wall and a chamber on one side of the wall surrounding said hub and defining a sump containing a fluid. An armature is supported on the hub for rotation therewith within the chamber and axially spaced from the wall. A field shell is disposed on an opposite side of the rotor wall from the armature and houses a conductor. The field shell is isolated from the fluid in the chamber. Energization of the conductor urges the armature in a first axial direction towards the radially extending wall of said rotor to couple the rotor to the hub for rotation therewith.
F16D 27/115 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
F16D 27/14 - Magnetically-actuated clutchesControl or electric circuits therefor Details
A rotational coupling device is provided that minimizes flux leakage from a magnetic circuit that engages the device. The device includes a rotor and an armature defining opposed engagement surfaces. The rotor, the armature and a field shell disposed on one side of the rotor and housing an electrical conductor comprise members of a magnetic circuit that, upon energization of the conductor, draws the armature into engagement with the rotor. A torque transmission member is coupled to the armature and supported by a bearing. In one embodiment a sleeve is disposed radially inwardly of the bearing. To prevent flux leakage through the torque transmission member, the sleeve has a magnetic permeability that is lower than a magnetic permeability of the members of the magnetic circuit. In another embodiment, a support cup of the torque transmission member has a radially outwardly turned flange to distance the cup from the rotor.
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
63.
Rotational coupling device with flux leakage path insulator
A rotational coupling device is provided that minimizes flux leakage from a magnetic circuit that engages the device. The device includes a rotor and an armature defining opposed engagement surfaces. The rotor, the armature and a field shell disposed on one side of the rotor and housing an electrical conductor comprise members of a magnetic circuit that, upon energization of the conductor, draws the armature into engagement with the rotor. A torque transmission member is coupled to the armature and supported by a bearing. In one embodiment a sleeve is disposed radially inwardly of the bearing. To prevent flux leakage through the torque transmission member, the sleeve has a magnetic permeability that is lower than a magnetic permeability of the members of the magnetic circuit. In another embodiment, a support cup of the torque transmission member has a radially outwardly turned flange to distance the cup from the rotor.
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F16D 27/14 - Magnetically-actuated clutchesControl or electric circuits therefor Details
A rotational coupling device for use as a clutch, a brake, or a combination clutch and brake is provided having structure to compensate for wear on braking surfaces. The device includes an armature coupled to an output member and movable between positions of engagement with a rotor and a brake plate. The brake plate is coupled to a stationary field shell that houses a conductor on one side of the rotor opposite the armature and brake plate. The brake plate is axially spaced from the field shell and a removable shim or adjustable spacer is disposed between the brake plate and the field shell. Removal of the shim or adjustment of the spacer permit movement of the brake plate towards the field shell to compensate for wear in any of the clutch or brake engagement surfaces of the device.
A rotational coupling device (20) for use as a clutch and/or brake is provided having structure to compensate for wear on braking surfaces. The device includes an armature (36) coupled to an output member (24) and movable between positions of engagement with a rotor (26) and a brake plate (38). The brake plate is coupled to a stationary field shell (32) that houses a conductor (34) on one side of the rotor opposite the armature and brake plate. The brake plate is axially spaced from the field shell and a removable shim (42) or adjustable spacer (136) is disposed between the brake plate and the field shell. Removal of the shim or adjustment of the spacer permit movement of the brake plate towards the field shell to compensate for wear in the clutch and/or brake engagement surfaces of the device.
A rotational coupling device for use as a clutch, a brake, or a combination clutch and brake is provided having structure to compensate for wear on braking surfaces. The device includes an armature coupled to an output member and movable between positions of engagement with a rotor and a brake plate. The brake plate is coupled to a stationary field shell that houses a conductor on one side of the rotor opposite the armature and brake plate. The brake plate is axially spaced from the field shell and a removable shim or adjustable spacer is disposed between the brake plate and the field shell. Removal of the shim or adjustment of the spacer permit movement of the brake plate towards the field shell to compensate for wear in any of the clutch or brake engagement surfaces of the device.
A releasable backstopping clutch is provided with a safety mechanism to prevent uncontrolled release of the clutch. A support structure is fixed against rotation and releaseably coupled to the one of the inner or outer members of the backstopping clutch. The support structure inhibits rotation of the member when coupled to the member and permits rotation of the member when uncoupled from the member to release the clutch. A sensor is configured to generate a signal indicative of a characteristic associated with movement of the member and a controller is configured to cause recoupling of the support structure and the member if the characteristic meets a predetermined condition.
A fluid actuated rotational coupling device (10) is provided with improved sealing of fluid passages. The device includes a fluid actuated rotational coupling that is disposed on a rotatable shaft (12). The coupling defines a fluid port (74). A key (32) is received within a keyway (76) in the coupling and/or shaft (12) and defines a fluid passage (116) extending therethrough having fluid ports (118,120) at either end aligned with the fluid port in the coupling and a fluit port in the shaft. The key also defines grooves (122,124) formed in surfaces of the key (32) and surrounding the fluid ports. Seals (34,36) are disposed within the grooves (122,124) in the key (32). By locating the fluid passage (116) and seals (34,36) in the key (32), the seals (34, 36) may be removed and replaced without removing the coupling from the shaft (12). Further, the seals (34,36) are less likely to be damaged during installation of the coupling device on the shaft (12).
F16D 25/0638 - Fluid-actuated clutches in which the fluid actuates a piston incorporated in the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
A permanent magnet activated wrap spring clutch (10). A coil spring (32) surrounds an input hub (14) and an output hub (22) and is selectively engaged to wrap down upon the hubs for the transmittal of torque. In an unpowered, engaged condition of the clutch, a permanent magnet (40) attracts a control collar (38) attached to the spring into frictional engagement with a rotating input element (20). Rotation of the control collar causes the spring to wrap down from its somewhat oversized diameter at rest to grip the hubs. In a powered, disengaged condition of the clutch, an energized coil (44) causes the magnetic field of the permanent magnet to move away from the control collar, thereby removing the frictional engagement and allowing the spring to unwrap. The clutch provides torque transmittal without electrical power and ensures complete disengagement regardless of a low momentum or high drag on the output.
F16D 27/01 - Magnetically-actuated clutchesControl or electric circuits therefor with permanent magnets
F16D 27/105 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with a helical band or equivalent member co-operating with a cylindrical coupling surface
70.
Rotational coupling device with improved drive key retention structure
A rotational coupling device for use as a clutch and/or brake is provided with improved retention of a drive key during shipping, assembly, and operation of the device. The device includes a rotor disposed about an input shaft. The input shaft is disposed about a rotational axis and the rotor and input shaft define opposed keyways. A key is disposed in the keyways and rotatably couples the rotor and input shaft. An armature is disposed about the axis and coupled to an output member and configured for selective engagement with the rotor. In one embodiment, the key and a support member in the device are shaped in a complementary fashion to limit radial and axial movement of the key. In another embodiment, an axial end of the key or rotor is deformed to axially align the axial ends of the key and rotor and limit axial movement of the key.
F16D 27/14 - Magnetically-actuated clutchesControl or electric circuits therefor Details
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
F16D 1/08 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hubCouplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with hub and longitudinal key
A retainer (22) for sprags (16) in an overrunning clutch is provided. The retainer is disposed between the inner and outer races of the clutch. The retainer includes first and second rings (40,42) disposed about an axis and axially spaced from one another and a plurality of cross bars (44) extending between the first and second rings. The plurality of cross bars are circumferentially spaced and define a plurality of openings. Each opening is configured to receive one of the sprags disposed between the inner and outer races of the clutch. At least the cross bars of the retainer are made from a tool steel, preferably S7 tool steel. The construction of the retainer increases the abrasion resistance of the retainer and extends the service life of the clutch.
Various torque arm assemblies for a backstopping clutch (16) are provided that enable load sharing among multiple torque arm assemblies, controlled release of load on the torque arm assembly and/or load sensing. The torque arm assembly includes a head member (42) that is connected to an outer race of a backstopping clutch and defines a pair of attachment points (72, 74). One end of an arm member (44) is pivotally connected to one attachment point of the head member while the other end of the arm member is connected to a stationary structure. A strut (46) extends between the other attachment point of the head member and the arm member. Upon backstopping action in one embodiment, the head member rotates slightly against the force of the strut allowing other torque arm assemblies to receive a portion of the system load. The position of the strut may be adjustable to allow controlled release of the load tension.
F16D 41/07 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by pivoting or rocking, e.g. sprags between two cylindrical surfaces
A liquid cooled brake is provided having a housing that provides strong yet lightweight structural support. The brake includes end plates (26,34) disposed about a driven shaft and axially spaced from one another. A plurality of axially extending pins (16) connect the end plates. A friction plate (18a, 18b) is coupled to the driven shaft for rotation therewith and is axially movable relative to the driven shaft. Another friction plate (20a) defines a fluid jacket (70) and is coupled to the pins (16). The friction plate (20a) is fixed against rotation, but axially movable, relative to the pins. A pressure plate (38) is configured for selective movement towards the friction plates. Support columns (22) are disposed radially outwardly of each pin (16) and fixed to the end plates. The support columns prevent undue strain on the pins. Ventilated guards (24) may also be located between each pair of columns (22) to limit access to internal working components of the brake.
A liquid cooled brake is provided having an improved housing that provides strong yet lightweight structural support. The brake includes end plates disposed about a driven shaft and axially spaced from one another. A plurality of axially extending pins connect the end plates. A friction plate is coupled to the driven shaft for rotation therewith and is axially movable relative to the driven shaft. Another friction plate defines a fluid jacket and is coupled to the pins. The friction plate is fixed against rotation, but axially movable, relative to the pins. A pressure plate is configured for selective movement towards the friction plates. Support columns are disposed radially outwardly of each pin and fixed to the end plates The support columns prevent undue strain on the pins. Ventilated guards may also be located between each pair of columns to limit access to internal working components of the brake.
An overrunning clutch is provided that facilitates the use of grease lubrication and use of the clutch in high speed and/or high torque applications. In accordance with one aspect of the invention, a seal is disposed between the rollers in the clutch and a bearing that is disposed, between the input and output members and the inner raceway, outer cam surfaces, rollers and bearing are lubricated with grease. In accordance with another aspect of the invention, the mass of the rollers and the stiffness of the springs acting on the rollers are selected to provide a high natural frequency for the roller and spring system to enable the clutch to better withstand torsional vibration in high speed and/or high torque applications.
A rotational coupling device for use as a clutch and/or brake is provided having a construction enabling improved torque transfer characteristics. The device includes a rotor rotatably coupled to an input shaft and an armature coupled to an output member and configured for selective engagement with the rotor. The rotor includes a hub having a central bore into which the input shaft extends. A support member, such as a spacer or pulley hub is coupled to the rotor hub using an axially projecting lug and notch construction. The structure of the device provides greater clearance for the input shaft and may eliminate the need for keys on the support member.
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
A rotational coupling device for use as a clutch and/or brake is provided having a construction enabling improved torque transfer characteristics. The device includes a rotor rotatably coupled to an input shaft and an armature coupled to an output member and configured for selective engagement with the rotor. The rotor includes a hub having a central bore into which the input shaft extends. A support member, such as a spacer or pulley hub is coupled to the rotor hub using an axially projecting lug and notch construction. The structure of the device provides greater clearance for the input shaft and may eliminate the need for keys on the support member.
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
A rotational coupling device for use as a clutch and/or brake is provided having a modular construction enabling relatively easy variation of braking torque and having improved magnetic efficiency during brake engagement and release. The device includes one or more brake modules attached to a mounting bracket to vary braking torque. The brake modules include brake poles axially aligned with one portion of an armature. Permanent magnets are contained in one of the brake pole and the armature and axially aligned with the other providing a strong magnetic circuit. The mounting bracket is axially aligned with another portion of the armature, radially outward of the portion aligned with the brake pole. At least one of the mounting bracket and the aligned portion of the armature has a high magnetic reluctance providing a flux busting gap in the magnetic circuit that allows easier release of the brake.
The present invention relates to a bi-directional overrunning clutch (34) that enables movement of an object between multiple rotational bodies in either direction using a single motor (30). The clutch (34) includes a pair of cam discs (44,46) disposed about a driven shaft (42) extending from the motor (30) and spaced from one another, outer races disposed outwardly of each cam disc and rollers disposed between the cam discs and outer races (48,50). The cam discs (44,46) are oriented such that rotation of the shaft (42) in one rotation direction causes rotation of one outer race and freewheeling of the other outer race while rotation of the shaft in the opposite rotational direction causes rotation of the other outer face and freewheeling of the one outer race.
An adjustable fluid cooled brake is provided that integrates the driven shaft (12) and bearings (50, 52) with braking components to form a packaged assembly. The brake further includes a housing (18) disposed about the shaft and friction plates (20, 22) coupled to the housing and driven shaft. One end cap assembly (26) of the brake is coupled to the housing and supports one of the bearings. The end cap assembly includes a pressure plate (152) configured to compress the friction plates. Another end cap assembly (24) is coupled to the housing and supports the other bearing. One of end cap assemblies is spaced from the housing by a spacer (28) that may be adjusted to enable axial movement of the end cap assembly relative to the housing and the corresponding bearing thereby permitting adjustment of the brake.
F16D 55/42 - Brakes with a plurality of rotating discs all lying side by side actuated by a fluid-pressure device arranged in or on the brake comprising an expansible fluid-filled flexible member coaxial with the brake
F16D 65/44 - Slack adjusters mechanical non-automatic by means of direct linear adjustment
B66D 5/14 - Crane, lift, hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
E21B 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus for feeding the rods or cables
A fluid jacket for a disc brake (10) is provided that promotes a balanced flow of cooling fluid throughout the fluid jacket (40) to most effectively remove heat from the disc brake. The fluid jacket (40) includes an annular body (70) configured for engagement with a friction surface. The annular body defines a plurality of concentric flow passages (72, 78, 84). The annular body further defines first (86) and second (90) axial flow passages in fluid communication with first (84) and second (74) flow passages, respectively of the plurality of concentric flow passages, with the first and second flow passage separated by a third concentric flow passage (78). The annular body further defines a radial flow passage (94) extending between the first and second axial flow passages, and a fluid inlet (98) in fluid communication with the radial flow passage (94).
An industrial brake is provided through which tension and emergency braking are initiated at opposite axial ends of the brake in order to improve packaging and maintenance of the brake and to enable the addition of an emergency brake function to existing tension brakes without substantial modifications to the brake. The brake includes a housing disposed about a driven shaft and friction plates coupled to the housing and the shaft respectively. One friction plate comprises a liquid cooled fluid jacket. One end cap assembly is disposed at one axial end of the housing and provides a tension brake function. Another end cap assembly is disposed at the opposite axial end of the housing and provides an emergency brake function.
A rotational coupling device for use as a clutch and/or brake is provided having improved magnetic efficiency and structural integrity. A field shell and a rotor of the device each define radially spaced, axially extending inner and outer poles. The inner pole of the rotor is disposed radially outwardly of the inner pole of the field shell resulting in improved magnetic efficiency.
A rotational coupling device for use as a clutch and/or brake is provided having improved magnetic efficiency and structural integrity. A permanent magnet is coupled to one of a brake plate and an armature and axially aligned with a portion of the other for improved braking performance.
A rotational coupling device for use as a clutch and/or brake is provided having improved magnetic efficiency and structural integrity. An electrical conduction assembly is disposed within a field shell between radially spaced inner and outer poles of the field shell. The assembly includes a conductor disposed within a shell having a radially extending flange that is disposed proximate the outer pole of the field shell and that is affixed to the field shell at a plurality of points.
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Clutches and brakes for industrial machines Sensors, namely magnetic, inductive, capacitive, photo-electric, rotary, load-cell, and ultrasonic sensors; switches, namely, limit switches, foot switches, cable pull switches, magnetic switches and interlock switches; and tension control systems, primarily consisting of sensors, switches, brakes, clutches, power supplies and electronic controls Clutches and brakes for vehicles
