Disclosed is an apparatus for moving a plate in opposite directions using a plurality of hydraulic actuators wherein at least one possible inclination of the plate relative to a specifiable reference plane is monitored by means of a sensor device which controls the actuators in such a way that the plate takes the position of the reference plane.
The disclosure relates to an electromechanical cylinder with a screw drive which converts the introduced motor torque of an electric motor into a linear movement for an actuating part, wherein at least one force acting on the actuating part is detected by means of a sensor device.
A method for actuating a fluid actuator (10), comprising at least the following steps: - carrying out an initialization in order to determine at least one defined end position (x, y) in a movement direction of the actuator (10), and subsequently - carrying out position control on the basis of a virtual brake point, belonging to the end position (x, y), for the actuator (10), - retarding the speed of the actuator (10) at the brake point until the following end position (x, y) in the movement direction is reached, and - reversing the actuator (10) into the opposite movement direction.
F04B 9/113 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
F04B 27/00 - Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
F15B 9/09 - Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor with electrical control means
F04B 35/00 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
The invention relates to an electromechanical cylinder with a screw drive which converts the introduced motor torque of an electric motor (10) into a linear movement for an actuating part (14), characterised in that at least one force acting on the actuating part (14) is detected by means of a sensor device (46).
Disclosed is an apparatus for moving a plate (10) in opposite directions using a plurality of hydraulic actuators (1, 2, 3, 4), characterized in that at least one possible inclination of the plate (10) relative to a specifiable reference plane is monitored by means of a sensor device (14) which controls the actuators (1, 2, 3, 4) in such a way that the plate (10) takes the position of the reference plane.
B01D 25/19 - Clamping means for closing the filter press, e.g. hydraulic jacks
B30B 15/00 - Details of, or accessories for, pressesAuxiliary measures in connection with pressing
B30B 15/24 - Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
F15B 11/22 - Synchronisation of the movement of two or more servomotors
B01D 25/00 - Filters formed by clamping together several filtering elements or parts of such elements
A control device, for a hydraulic consumer (22) and susceptible to vibrations, includes a valve (24) having a control spool (40) controllable by an actuating device (46). The valve (24) has a pressure supply port (P), to which a pressure compensator valve can be connected, which can be supplied with pressure fluid from a pressure supply device. The actuating device (46) has a motor (74). A load-pressure-dependent force on the control spool (40) can be generated by a control device (66). That force at the control spool (40) acts on an electronic motor controller (208) of the DC motor (74), which detects a change of the force and acts as a damping of the vibrations of the consumer (22) against this change of force.
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
F15B 13/044 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
F15B 15/06 - Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non-rectilinear movement
F15B 21/00 - Common features of fluid actuator systemsFluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
F16K 31/52 - Mechanical actuating means with crank, eccentric, or cam
A valve, which is characterized in that between a neutral position (38) of a control spool (STS) and one of its end positions (34, 42) a regeneration position (36) is provided. In the regeneration position, two utility ports (A, B) are interconnected in a fluid-conveying manner, or a floating position (40) is provided, in which these utility ports (A, B) are interconnected in a fluid-conveying manner. A further valve is characterized in that by a further motion of the control spool (STS) in the same direction, as that, in which a fluid connection is established between the utility ports (A, B) starting from the neutral position (38), this fluid connection is interrupted.
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
F15B 13/044 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
F15B 15/06 - Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non-rectilinear movement
F15B 21/00 - Common features of fluid actuator systemsFluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
F16K 31/52 - Mechanical actuating means with crank, eccentric, or cam
8.
Device for decoupling vibrations between two systems and the working machine
B60G 13/00 - Resilient suspensions characterised by arrangement, location, or type of vibration-dampers
B60G 99/00 - Subject matter not provided for in other groups of this subclass
F16F 15/00 - Suppression of vibrations in systemsMeans or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
F16F 15/02 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system
A control device for at least one hydraulic working section (A, B), which can be connected to a pressure supply source (P) and a return flow (T) via a hydraulic supply circuit and to a control valve (34) supplied with a pilot pressure. The device includes an emergency shutdown system (32) having a pilot solenoid valve (16) and an additional valve (14). Both the hydraulic energy flow from the pressure supply source (P) to at least one of the respective working sections (A, B) and the pilot pressure supply to the control valve (34) can be suppressed by the pilot solenoid valve (16) via the additional valve (14).
A pressure supply device for prioritised volume flow splitting, in particular in mobile working machines, includes at least one adjusting pump (2) controllable by an LS signal as main pump, a constant-displacement pump (4) as an auxiliary pump, and two pressure balances. A system is supplied primarily, in particular in the form of steering hydraulics (PL), which outputs an LS signal. A system is supplied secondarily, which outputs a further LS signal, in particular in the form of working hydraulics (PA). A further system is supplied hydraulically, in particular in the form of brake hydraulics (PB). One pressure balance (DW1) is used to supply the system (PL) to be supplied primarily and/or the further hydraulic system (PB), the other pressure balance (DW2) is used to supply the system (PL) to be supplied primarily and/or the system (PA) to be supplied secondarily, The respective pressure balance (DW1, DW2) can be activated by an LS signal in such a way that the constant-displacement pump (4) is also used to supply the system (PA) to be supplied secondarily.
A control apparatus for supplying at least one hydraulic consumer with fluid has a variable displacement pump (10) controlled by a load-sensing pressure (LS). For a case-by-case increase in the volume flow in the supply of fluid (22) to the hydraulic consumer, the load-sensing pressure (LS) is passed via a control line (28) to a control circuit (2) that ensures the increase in the supply (22) by connecting in a constant-displacement pump (16) as soon as an operator calls for the relevant function by operating the control circuit (2).
A valve includes a valve housing (2) for transport of a heatable fluid such as hydraulic oil. The valve housing has at least one utility connection (A, B), at least one pressure supply connection (P), and at least one return connection (T1, T2). A control slide (6) is guided in the valve housing (2) in a longitudinally displaceable manner. In at least one position of the control slide (6), the pressure supply connection (P) is at least partially separated from the utility connection (A, B), and the heatable fluid arrives, proceeding from this pressure supply connection (P) and via a heat-emitting connection in the control slide (6), at the at least one return connection (TI, T2) as a loss volume flow. The loss volume flow serves as a heat source and heats at least regions of the control slide (6).
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
The invention relates to a valve, characterized in that, between a neutral position (38) of a control slide (STS) and one of the end positions (34, 42) thereof, a regeneration position (36), in which two utility connections (A, B) are connected in a fluid-conducting manner, or a float position (40), in which said utility connections (A, B) are connected to each other in a fluid-conducting manner, is provided. The invention further relates to a valve, characterized in that, as a result of a further movement of the control slide (STS) in the same direction as a fluid connection is established between the utility connections (A, B) from the neutral position (38), said fluid connection is interrupted.
The invention relates to a valve having a valve housing (12) which has at least one pressure supply connection (P), a first service connection (A), a second service connection (B) and a return connection (T1, T2) and in which a control spool (STS) is guided in a longitudinally movable manner to actuate these individual connections (P, A, B, T1, T2), there being in the valve housing (12) a load-sensing line (84) in which there is a shuttle valve (108) for relaying a load pressure present at one of the service connections (A, B). According to the invention, the control spool (STS) is provided with circumferential recesses (98, 104, 106) such that it connects at most one of the inputs (102, 122) of the shuttle valve to the service connection (A, B) connected to the pressure supply connection (P) and the other input (120, 122) or the inputs (120, 122) of the shuttle valve (108) to the return connection (T1, T2), depending on the position.
The invention relates to a control device for a hydraulic consumer which is susceptible to vibrations, comprising a valve (24) having a control spool (40) which can be actuated by means of an actuation apparatus (46). The valve (24) has a pressure supply connection (P) to which a deadweight tester can be connected, which can be supplied with pressurised fluid by a pressure supply apparatus. The actuation device (46) has a motor (74). A load-dependent force can be generated at the control spool (40) by means of a control apparatus (66). According to the invention, this force at the control spool (40) acts on an electronic motor controller (208) of the DC motor (74), which detects a change in the force and acts to damp the vibrations of the consumer, counteracting this change in the force.
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
F15B 13/044 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
wherein the inlet (1) of the logic valve (V1) may be connected to a pressure supply source (HD), characterized in that the outlet (V1.2) of the logic valve (V1) and the outlet (V3.1) of the pressure reducing valve (V3) are connected together to an outlet or user port (A); and that the lock valve (V2) is connected with its inlet (V2.1) to the inlet (V1.1) of the logic valve (V1) as well as to a control side (V1.3) of the same, and with its outlet (V2.2) to an inlet (V3.2) of the pressure-reducing valve (V3).
F15B 13/043 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
F15B 1/02 - Installations or systems with accumulators
F15B 1/033 - Installations or systems with accumulators having accumulator charging devices with electrical control means
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
G05D 16/10 - Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
F16H 61/4096 - Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
G05D 16/20 - Control of fluid pressure characterised by the use of electric means
F15B 13/042 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
18.
Directional valve comprising a damping system for controlling a torque motor of a construction machine
A valve includes a valve housing (33), which has at least one service connection (A, B), a pressure supply connection (P) and a return connection (T). In the valve housing (33), a control slide (STS) is guided so as to be movable longitudinally to control these individual connections. The supply pressure, which is applied to the pressure connection (P) to control a consumer (10, 12), connected to the service connection (A; B), is guided across at least one control side (56) of the control slide (STS) via an orifice plate (54) and a control channel (50). The control side (56) is positioned in a control chamber (58) in the valve housing (33) such that it can move. The control chamber (58) is connected to the return connection (T) via an additional orifice plate (59).
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
F15B 11/10 - Servomotor systems without provision for follow-up action with only one servomotor in which the servomotor position is a function of the pressure
19.
DEVICE FOR DECOUPLING VIBRATIONS BETWEEN TWO SYSTEMS AND THE WORKING MACHINE
B60G 17/00 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
B60G 13/00 - Resilient suspensions characterised by arrangement, location, or type of vibration-dampers
A control device for an agricultural vehicle having a spray boom assembly for spreading material, such as fertilizer, plant protection products or seeds includes a control unit and at least two pressure control valves used for controlling an inclination of the spray boom assembly and connected to the control unit. Each pressure control valve has assigned thereto a check valve and a pressure sensor, the check valve being arranged between the pressure sensor and the pressure control valve. An agricultural vehicle and a method for operating the agricultural vehicle are arranged to spread material, such as fertilizer, plant protection products or seeds.
A valve apparatus for influencing a flow of medium between a supply port (38) and a pressure port (40) has a valve device (10). In one closed position, the valve device blocks the connection between the supply port (38) and the pressure port (40). The valve device opens this connection in one opened position, in which the pressure port (40) is connected to at least one of two medium chambers (62, 80) by a respective fluid channel (64, 82). One fluid chamber (64) comprises a fluid duct (68) in the valve slider (22). The other fluid channel (82) has a further fluid duct (84) that is separate from the fluid duct (68). In one of the opened positions of the valve slider (22), the further fluid duct (84) opens at one end (92) into the medium chamber (80). In every displacement position of the valve slider (22), the further fluid duct (84) is permanently connected at the other end (94) to the pressure port (40).
The invention relates to a pressure supply device for prioritised volume flow splitting, in particular in mobile working machines, comprising at least one adjusting pump (2) controllable by means of an LS signal as main pump, a constant-displacement pump (4) as an auxiliary pump, two pressure balances, a system to be supplied primarily, in particular in the form of steering hydraulics (PL), which outputs an LS signal, a system to be supplied secondarily, which outputs a further LS signal, in particular in the form of working hydraulics (PA), and a further system to be supplied hydraulically, in particular in the form of brake hydraulics (PB), wherein one pressure balance (DW1) is used to supply the system (PL) to be supplied primarily and/or the further hydraulic system (PB), the other pressure balance (DW2) is used to supply the system (PL) to be supplied primarily and/or the system (PA) to be supplied secondarily, and wherein the respective pressure balance (DW1, DW2) can be activated by an LS signal in such a way that the constant-displacement pump (4) is also used to supply the system (PA) to be supplied secondarily.
The invention relates to a control apparatus for supplying at least one hydraulic consumer with fluid having a variable displacement pump (10) which may be controlled by means of a loadsensing pressure (LS), characterized in that, for a case-by-case increase in the volume flow in the supply (22) to the hydraulic consumer, the loadsensing pressure (LS) is passed via a control line (28) to a control device (2) which ensures the increase in the supply (22) by connecting in a constant-displacement pump (16) as soon as an operator calls for the relevant function by operating the control device (2).
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
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 11/16 - Servomotor systems without provision for follow-up action with two or more servomotors
The invention relates to a valve comprising a valve housing (2) which, for transport of a heatable fluid such as hydraulic oil, has at least one utility connection (A, B), at least one pressure supply connection (P), and at least one return connection (T1, T2), and a control slide (6) which is guided in the valve housing (2) in a longitudinally displaceable manner. The valve is characterised in that, in at least one position of the control slide (6), in which position the pressure supply connection (P) is at least partially separated from the utility connection (A, B), the heatable fluid arrives, proceeding from this pressure supply connection (P) and via a heat-emitting connection in the control slide (6), at the at least one return connection (T1, T2) as a loss volume flow which, serving as a heat source, heats at least regions of the control slide (6).
F15B 21/04 - Special measures taken in connection with the properties of the fluid
F16K 49/00 - Means in or on valves for heating or cooling
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
A pressure accumulator system, in particular for adaptation of the gas quantity and the static prestressing pressure in the case of a variable suspension system of a working hydraulics means (38, 40, 42, 44, 58, 60) of a mobile machine, having at least one hydraulic accumulator (12, 54), the fluid side (28) of which can be connected to a fluid supply device (P) by means of at least one valve device (14), is characterized in that the fluid side (28) of the hydraulic accumulator (12, 54) can be connected to a supply line (A) for a hydraulic consumer (38-44, 58, 60) by means of a further valve device (18, 18a - 18d), in that the supply line (A) is connected on the output side to a control valve device (22) which is connected on the input side to the fluid supply device (P), and in that the two valve devices (14, 18, 18a - 18d) are connected at a common connection point (24, 56) which is connected in a fluid-conducting manner to the fluid side (28) of the hydraulic accumulator (12, 54).
The invention relates to a closed-loop control system for an agricultural utility vehicle (1) comprising a distributor rod assembly (4) for applying material such as fertiliser, crop protection agents or seed, said distributor rod assembly extending transversely to the driving direction and having a central part (2) and, connected via joints to the central part (2), two lateral extension arms (3) having multiple rod portions which are connected via joints and which can be folded up relative to one another into a transport position and folded out relative to one another into a working position. The central part (2) is mounted so as to be movable along a vertical axis for adjusting the height of the distributor rod assembly. At least one hydraulic device is associated with each extension arm (3), whereby each extension arm (3) can be pivoted about a horizontal axis. Furthermore, at least three sensors (5) are associated with the distributor rod assembly (4) in order to determine the distance of the central part (2) and of each extension arm (3) from the floor, and the system has a data-processing unit which is configured such that the signals from the sensors (5) are processed as actual values and, on the basis of said actual values, an actuating signal for the hydraulic device is generated for adjustment to a target distance. Thus, the target distance for pivoting the extension arms (3) is formed using the current actual value for the central part (2). The invention also relates to an agricultural utility vehicle (1) and a method for controlling an agricultural utility vehicle (1).
A01M 7/00 - Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
27.
OPEN-LOOP AND/OR CLOSED-LOOP CONTROL SYSTEM, AGRICULTURAL UTILITY VEHICLE, AND METHOD FOR THE OPEN-LOOP AND/OR CLOSED-LOOP CONTROL OF AN AGRICULTURAL UTILITY VEHICLE
The invention relates to an open-loop and/or closed-loop control system for an agricultural utility vehicle, comprising a distributor linkage (12) for dispensing material, such as fertilizer, plant protection agent or seeds, which distributor linkage extends transversely to the direction of travel and has a center part (2) and two lateral extension arms (3), which are connected to the center part (2) and which have a plurality of linkage sections (4), which can be folded in relative to each other in a transport position and can be folded out relative to each other in a working position and are connected by joints. Each extension arm (3) is assigned at least one hydraulic device, by means of which the distributor linkage (12) can be transferred from a transport position into a working position. The system also has at least one sensor (15 a, b) and a data-processing unit, which is configured in such a way that the signals of the at least one sensor (15 a, b) are processed and, on the basis of said signals, a control signal for the hydraulic device is generated, and the hydraulic device can be controlled in order to set the damping of vibrations occurring at the distributor linkage (12) in the direction of travel. The sensor (15 a, b) is designed in such a way that a pressure change at the hydraulic device occurring because of vibrations of the distributor linkage (12) can be determined. The invention further relates to an agricultural utility vehicle and to a method for the open-loop and/or closed-loop control of an agricultural utility vehicle.
A control device having a plurality of modular control sections (12a - 12d), which form a control block when arranged beside one another and have units of an electromagnetically actuatable actuator system and/or of a sensor system for controlling or monitoring a valve apparatus, which are connected to a central energy supply and/or monitoring device, which have individual connection parts (20a - 20d) assigned to the particular control section (12a - 12d), and which are connected in series and to one another, is characterized in that at least some of the connection parts (20a - 20d) used are wirelessly in direct engagement with one another by way of the plug parts (22a - 22c) and socket parts (24a - 24c) thereof which face one another and are adjacent to one another.
F15B 13/08 - Assemblies of units, each for the control of a single servomotor only
H01R 12/79 - Coupling devices for flexible printed circuits, flat or ribbon cables or like structures connecting to rigid printed circuits or like structures
The invention relates to a suspension device, in particular for axle suspensions in tractors, comprising at least one suspension cylinder, the piston-rod unit (12) of which separates a piston side (18) from a ring side (14) within a cylinder housing (20). Said suspension device is characterized in that a maximum pressure limitation is carried out on the ring side (14) of the respective suspension cylinder by means of a pressure-limiting valve (26).
B60G 11/30 - Resilient suspensions characterised by arrangement, location, or kind of springs having fluid springs only, e.g. hydropneumatic springs having pressure fluid accumulator therefor, e.g. accumulator arranged in vehicle frame
A mobile working machine, in particular an agricultural device such as a self-propelled sprayer, comprising a structure which is hydraulically supported with respect to an undercarriage by means of cylinders (2, 4) having a piston chamber (6) and a rod chamber (8), wherein a switching device (18, 22, 36, 38) is provided which, in a switching position, fluidically connects the piston chamber (6) of a cylinder (2, 4) to the rod chamber (8) of another cylinder (2, 4), and vice versa, ឬbᡶcharacterised in thatឬ/bᡶ, as part of the switching device, first valves (18, 22) and second valves (36, 38) are connected on the fluid-conveying connection (12, 14) between the piston chamber (6) of the one cylinder (2, 4) and the rod chamber (8) of the other cylinder (2, 4), the first valves (18, 22) each being connected on the input side to the piston chamber (6) and to a first hydraulic accumulator (28, 30) and the second valves (36, 38) being connected on the input side to the rod chamber (8) and on the output side to a second hydraulic accumulator (32, 34).
B60G 21/073 - Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
B60G 17/0165 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
A hydrostatic drive, as a whole system, includes two fluidic displacement units (1, 3), which can be adjusted at least in respect of the volumetric flow. One unit is coupled to an input (9). The other unit is coupled to an output (11). The units can be connected to each other in the manner of a closed fluidic circuit, to which a storage circuit (23) is connected. The storage circuit has at least one storage device (33), is divided into a low-pressure side (27) and a high-pressure side (25), and has a valve control (17) for controlling the whole system.
1. Valve and valve device comprising a valve of that type. 2. The invention relates to a valve comprising a valve housing (33), which has at least one service connection (A, B), a pressure supply connection (P) and a return connection (T) and in which valve housing (33) a control slide (STS) is guided so as to be movable longitudinally in order to control these individual connections. The valve is characterised in that the supply pressure, which is applied to the pressure connection (P) in order to control a consumer (10, 12) connected to the service connection (A; B), is guided across at least one control side (56) of the control slide (STS) via an orifice plate (54) and a control channel (50), the control side (56) being positioned in a control chamber (58) in the valve housing (33) such that it can move and the control chamber (58) being connected to the return connection (T) via an additional orifice plate (59).
A valve apparatus for influencing a flow of medium between a supply port (38) and a pressure port (40), having a valve device (10) which, in at least one closed position, blocks the connection between the supply port (38) and the pressure port (40) and which opens this connection in at least one opened position, in which the pressure port (40) is connected to at least one of two medium chambers (62, 80) by a respective fluid channel (64, 82), of which one (64) consists of a fluid duct (68) in the valve slider (22), is characterized in that the other fluid channel (82) has at least one further fluid duct (84) which is separate from the first fluid duct (68) and which, at least in one of the opened positions of the valve slider (22), opens at one end (92) into the medium chamber (80) and which, in every displacement position of the valve slider (22), is permanently connected at the other end (94) to the pressure port (40).
The invention relates to a control device for an agricultural vehicle having a spreader bar assembly (10) for applying material such as fertiliser, plant protection agents or seed. The control device comprises a control unit and at least two pressure-control valves (18), which are connected to the control unit, for controlling the inclination of the spreader bar assembly (10). Each pressure-control valve (18) is assigned a check valve (23) and a pressure sensor (33), wherein the check valve (23) is arranged between the pressure sensor (33) and the pressure-control valve (18). The invention also relates to an agricultural vehicle for applying material such as fertiliser, plant protection agents or seed and to a method for operating an agricultural vehicle.
A01C 23/00 - Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
A01M 7/00 - Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
The invention relates to a valve device with a pressure reducing function, consisting of at least one logic valve (V1), a blocking vale (V2) and a pressure reducing valve (V3).
The invention relates to a regulating and/or control system for an agricultural machine (2) comprising a distributor linkage (3) for discharging material, such as fertilizer, plant protection agents, or seeds, said distributor linkage being pivotal about at least one rotational axis running in the direction of travel; at least one first sensor device for ascertaining the inclination of the distributor linkage (3); and a data processing device for processing the sensor signals. The invention is characterized by at least one second sensor device for ascertaining the centrifugal force FF and/or the centrifugal acceleration aF acting on the first sensor device when the machine is cornering. The data processing device is designed such that an inclination measuring error of the first sensor device can be corrected on the basis of the sensor signals of the second sensor device.
A control device is disclosed for at least one hydraulic working section (A, B), which can be connected to a pressure supply source (P) and a return flow (T) via a hydraulic supply circuit and a control valve (34) supplied with a pilot pressure, the device comprising an emergency shutdown system (32) having a pilot solenoid valve (16) and an additional valve (14). Said control device is characterised in that both the hydraulic energy flow from the pressure supply source (P) to at least one of the respective working sections (A, B) and the pilot pressure supply to the control valve (34) can be suppressed by means of the pilot solenoid valve (16) via the additional valve (14).
F15B 11/16 - Servomotor systems without provision for follow-up action with two or more servomotors
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
F15B 13/08 - Assemblies of units, each for the control of a single servomotor only
B66C 23/90 - Devices for indicating or limiting lifting movement
A safety circuit, consisting of at least one hydraulic consumer (2), a valve device (12) for activating the hydraulic consumer (2), which has an LS-signal-carrying LS line (38), and an operator control device (46) for actuating the valve device (12) by means of an activation signal of a control device (CPU, 20), is characterized in that, for detecting malfunctions of the hydraulic consumer (2) and/or of the valve device (12) by means of the control device (CPU, 20), a plausibility comparison of the respective LS signal with the respective activation signal can be carried out.
A circuit arrangement for at least one fluidic actuator (11) having a piston-rod unit (14) guided so as to be longitudinally movable in a housing (8), which unit divides the housing (8) into two working spaces (16, 18), which are each assigned a logic valve (40, 42) and which are fluidically connected to a valve unit (20) that, depending on its switching state, causes the piston-rod unit (14) to move inward or outward, is characterized in that at least one placeholder (10, 12, 13) is connected to each of the connecting lines (44, 46) between the valve unit (20) and the working spaces (16, 18) of the actuator (11), which placeholder is in each case connected to a logic valve (40, 42), and in that the respective placeholder (10, 12, 13) can be fitted with a selectable connection part (58, 60) with fluid connections (1, 2, 3) which are connected to one another in different ways depending on the type of the selected connection part (58, 60).
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
Valve device consisting of at least one valve piston (1) which is arranged in a valve housing (3) in such a way as to be longitudinally movable along a movement axis (5) by an electric motor (23) and which at least partially connects or disconnects fluid connection points (P, A, B) in the valve housing (3) to or from each other, said valve device being characterized in that the drive axis (25) of the electric motor (23) intersects the movement axis (5) of the valve piston (1), runs through the top face (6) and/or the bottom face (8) of the valve housing (3), and is arranged in the valve housing (3) in such a way as to extend (10) parallel or at an angle to the fluid connection points (P, A, B).
F16K 31/54 - Mechanical actuating means with toothed gearing with pinion and rack
F16K 31/04 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a motor
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
F15B 13/044 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
F16K 31/53 - Mechanical actuating means with toothed gearing
patents
