A new scissor-ramp mechanism for a Continuously Variable Transmission (CVT) provides smooth transmission of variation to the width of the groove for the V-belt of the CVT. The scissor-ramp mechanism consists in driving rings that are coaxial, concentric to each other, and rotatable relative to one another, each having a driving abutting facet; and a driven ring having driven abutting facets. The driving abutting facets are adapted to abut against the driven abutting facets, with at least one abutting facet being provided by a helicoidal ramp. Rotating the driving rings relative to one another exerts a contacting section of abutting facets to migrate over the ramp, thereby changing the axial dimension of the scissor-ramp mechanism.
F16H 25/12 - Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with reciprocation along the axis of rotation, e.g. gearings with helical grooves and automatic reversal
F16H 9/18 - Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts only one flange of each pulley being adjustable
2.
DRIVEN PULLEY FOR A CONTINUOUSLY VARIABLE TRANSMISSION
The driven pulley (200) is part of a continuously variable transmission (CVT) (100). It includes a fixed sheave (210) and a movable sheave (214) having conical walls (212, 216) forming a drivebelt-receiving groove (218). The driven pulley (200) also includes at least two axially extending members (260) for providing a direct torque-transmitting engagement between the two sheaves (210, 214) while allowing a relative axial motion between them. An insert (310) is also affixed inside each passageway (262) to simplify the manufacturing process and reduce costs.
F16H 9/12 - Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
F16H 9/16 - Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
3.
DRIVEN PULLEY FOR A CONTINUOUSLY VARIABLE TRANSMISSION
The driven pulley (200) is part of a continuously variable transmission (CVT) (100). It includes a fixed sheave (210) and a movable sheave (214) having conical walls (212, 216) forming a drivebelt-receiving groove (218). The driven pulley (200) also includes at least two axially extending members (260) for providing a direct torque-transmitting engagement between the two sheaves (210, 214) while allowing a relative axial motion between them. An insert (310) is also affixed inside each passageway (262) to simplify the manufacturing process and reduce costs.
F16H 9/12 - Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
F16H 9/16 - Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
A method of managing a transmission ratio with an assisted CVT with a governed engine to emulate a hydrostatic transmission and prevent a drivebelt abuse is provided, the method comprising: providing a reference power source rotational speed, using the assisted CVT to transmit rotatable motion between a power source and a drive mechanism, managing a torque of the power source to maintain a substantially even rotational speed upon a power source load variation and modulating a transmission ratio of the assisted CVT to change the rotational speed of the drive mechanism. A system and a vehicle having such a drivebelt abuse preventing mechanism is also provided.
F16H 61/662 - Control functions within change-speed- or reversing-gearings for conveying rotary motion specially adapted for continuously variable gearings with endless flexible members
A method of managing a transmission ratio with an assisted CVT with a governed engine to emulate a hydrostatic transmission and prevent a drivebelt abuse is provided, the method comprising: providing a reference power source rotational speed, using the assisted CVT to transmit rotatable motion between a power source and a drive mechanism, managing a torque of the power source to maintain a substantially even rotational speed upon a power source load variation and modulating a transmission ratio of the assisted CVT to change the rotational speed of the drive mechanism. A system and a vehicle having such a drivebelt abuse preventing mechanism is also provided.
F16H 61/662 - Control functions within change-speed- or reversing-gearings for conveying rotary motion specially adapted for continuously variable gearings with endless flexible members
An electronically controlled CVT driving pulley comprising a pair of opposed sheaves adapted to rotate about a driving pulley rotation axis is hereby provided, one of the sheaves including an axial protrusion including a series of teeth cooperating with an axial bearing mechanism providing a relative axial displacement between the opposed sheaves and to transmit a torque between the opposed sheaves. A kit and a method for transmitting a torque between two opposed sheaves of an electronically controlled CVT is also provided.
F16H 9/12 - Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
F16H 55/56 - Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable
F16H 57/035 - Gearboxes for gearing with endless flexible members
F16H 59/06 - Ratio selector apparatus the ratio being infinitely variable
F16H 61/662 - Control functions within change-speed- or reversing-gearings for conveying rotary motion specially adapted for continuously variable gearings with endless flexible members
7.
Electronically controlled continuously variable transmission with torque limiting system and method thereof
Is provided herein a torque-limiting electronically controlled CVT comprising a drive portion having a drive pulley including two opposed sheaves adapted to be actuated with an electric motor to set a transmission ratio between an engine and a ground contacting rotating member of a vehicle, an input module adapted to receive a signal indicative of whether a ground-contacting rotating member is airborne, a processing module adapted to determine a desired CVT ratio, and an output module adapted to actuate the electric motor to obtain the desired CVT ratio to match the circumferential velocity of the vehicle's airborne ground-contacting rotating member with the speed of the vehicle in order to limit a mechanical peak torque sustained by a drive system of the vehicle. Also provided hereby is a vehicle equipped with the CVT, a kit including such a CVT and a method of managing the CVT to limit the mechanical peak torque sustained by a drive train of a vehicle.
B60K 28/00 - Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
F16H 61/662 - Control functions within change-speed- or reversing-gearings for conveying rotary motion specially adapted for continuously variable gearings with endless flexible members
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
CONTINUOUSLY VARIABLE TRANSMISSION SYSTEMS FOR MACHINE MOTORS AND ENGINES, NAMELY, CONTINUOUSLY VARIABLE TRANSMISSIONS AND COMPONENTS THEREFOR, NAMELY, METAL DRIVE PULLEY, METAL DRIVEN PULLEYS AND TRANSMISSION BELTS CONTINUOUSLY VARIABLE TRANSMISSION SYSTEMS FOR LAND VEHICLE MOTORS AND ENGINES, NAMELY, CONTINUOUSLY VARIABLE TRANSMISSIONS AND COMPONENTS THEREFOR, NAMELY, METAL DRIVE PULLEY, METAL DRIVEN PULLEYS AND TRANSMISSION BELTS
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
(1) Continuously variable transmission system for all type of motors engine.
(2) Continuously variable transmission system for all type of motors engine.
10.
DRIVEN PULLEY FOR A CONTINUOUSLY VARIABLE TRANSMISSION
The driven pulley (10) comprises a first sheave (12) and a second sheave (40) coaxially mounted around a main shaft. The first sheave (12) is fixed with reference to the main shaft while the other sheave (40) is allowed to slide and rotate with reference to the main shaft. The driven pulley (10) is designed with a roller mounting unit (74) facilitating the assembling or the replacement of the rollers (70).
F16H 9/12 - Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
F16H 55/52 - Pulleys or friction discs of adjustable construction
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
[ CONTINUOUSLY VARIABLE TRANSMISSIONS FOR ALL TYPES OF MOTORS AND ENGINES NOT FOR LAND VEHICLES ] CONTINUOUSLY VARIABLE TRANSMISSIONS FOR ALL TYPES OF LAND VEHICLE ENGINES AND MOTORS
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
CONTINUOUSLY VARIABLE TRANSMISSIONS FOR ALL TYPES OF MOTORS AND ENGINES NOT FOR LAND VEHICLES CONTINUOUSLY VARIABLE TRANSMISSIONS FOR ALL TYPES OF LAND VEHICLE ENGINES AND MOTORS
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
(1) Continuously variable transmission system for all type of motors engine.
(2) Continuously variable transmission system for all type of motors engine.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
CONTINUOUSLY VARIABLE TRANSMISSIONS FOR ALL TYPES OF MOTORS AND ENGINES NOT FOR LAND VEHICLES CONTINUOUSLY VARIABLE TRANSMISSIONS FOR ALL TYPES OF LAND VEHICLE ENGINES AND MOTORS
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
(1) Continuously variable transmission system for all type of motors engines
(2) Continuously variable transmission system for all type of motors engines.
