Projections protruding towards a cam plate and a disc are provided on both axial side surfaces of the retainer at a plurality of positions at which phases of the projections in the circumferential direction are offset from pockets. One axial direction surface of the cam plate and the disc are formed with concave portions at portions facing the respective projections. The concave portions have an axial depth deepest at a center portion thereof in the circumferential direction and becoming shallower towards both end portions thereof.

A flyweight comprises a body. The body of the flyweight comprises a pivot, a cam surface, and a first coupler. The first coupler is configured to selectively couple at least one first weight to the body distal from the cam surface. A flyweight comprises a body having at least 20% of its mass positioned to contribute negative torque about a pivot related to an acceleration of a CVT clutch from an idling condition. A method of tuning a flyweight comprises attaching at least one first weight to a first coupler of a body of the flyweight distal from a cam surface of the body. A CVT clutch comprises at least one flyweight with a first coupler configured to selectively couple at least one first weight to a body of the flyweight distal from a cam surface.

The present concept is a continuously variable speed transmission and steering differential. It includes a laterally extending central drive axle driven by an external power source, two pairs of drive sheaves mounted to drive axles, and a means for transmitting rotational energy from the drive sheaves to the drive axles. There are two extended shift arms spaced apart for controlling the positioning of movable drive sheaves. Narrowing or increasing the gap between shift arms, does the same for the gap between the drive sheaves, increasing or decreasing the gear ration respectively which provides speed control. Shifting the shift arms left or right varies the gear ratio between the left and right pair of sheaves, providing differential speed between the left and right driven axles, which provides steering control.

A transmission comprising: a casing having: a first shaft having a truncated cone portion, a second shaft parallel to and spaced away from the truncated cone portion, a first gear mounted on the second shaft, the first gear being configured for rotation with the second shaft, the first gear being in connection with the first shaft, a linear actuator connected to the first gear, the linear actuator allowing to position the first gear at any one of a plurality of positions along the second shaft, the truncated cone portion having, at its beginning and its end, a respective one of a set of gears with a respective diameter and a respective number of teeth being proportionate to a diameter of the truncated cone portion, at least two counter-wound spiral gear tracks extending between the respective one of the set of gear s and another one of the set of gears.

A transmission comprising: a casing having: a first shaft having a truncated cone portion, a second shaft parallel to and spaced away from the truncated cone portion, a first gear mounted on the second shaft, the first gear being configured for rotation with the second shaft, the first gear being in connection with the first shaft, a linear actuator connected to the first gear, the linear actuator allowing to position the first gear at any one of a plurality of positions along the second shaft, the truncated cone portion having, at its beginning and its end, a respective one of a set of gears with a respective diameter and a respective number of teeth being proportionate to a diameter of the truncated cone portion, at least two counter-wound spiral gear tracks extending between the respective one of the set of gear s and another one of the set of gears.

A transmission controller of a toroidal continuously variable transmission includes a gain setting unit that adjusts a gain of closed-loop control for calculating a target value of a roller position in accordance with a change in a rotation speed of a disc in a first rotation speed range and a second rotation speed range higher than the first rotation speed range. The gain setting unit changes, in the first rotation speed range, the gain so that sensitivity of the closed-loop control decreases with an increase in the rotation speed, and changes, in the second rotation speed range, the gain so that a rate of decrease in the sensitivity of the closed-loop control with the increase in the rotation speed is smaller than that in the first rotation speed range.

In a conical friction ring transmission, the safety device may have a normal state, in which electrical energy is applied to the safety device, and a failure state, in which the safety device is free of electrical energy, or a bi-stable safety actuator with a normal position and a failure position, and may change the effect parameter of a mechanical articulating element for adjusting a friction ring. An especially compact design of the conical friction ring transmission is thus achieved.

A continuously variable transmission with an annular band body including grooves meshable with movable teeth provided on a second pulley and a biasing unit configured to bias the movable teeth radially outwardly of a shaft portion is provided with a hydraulic control unit configured to reduce a hydraulic pressure in a second oil chamber when a speed ratio reaches a predetermined speed ratio at which the grooves are meshed with the movable teeth.

A product may include a rotating sheave that may have a first sheave half and a second sheave half. A distance between the first and second sheave halves may be variable. A screw actuator may have a screw that may engage the first sheave half. A motor may be connected with the screw and may be operable to move the first sheave half to vary the distance through the screw.

Described are an oscillation amplitude control component, home electrical equipment and an oscillation amplitude control method and device. The component includes: a V-shaped grooved gear, a pressure pump, a roller with a pre-formed groove and a transmission belt; the V-shaped grooved gear includes a central shaft and two frustoconical members mounted on the central shaft; lateral surfaces of two frustoconical members and the central shaft enclose a V-shaped groove; a gear is arranged on a circumference of a frustoconical member, and joined with an oscillating switch selectively; the transmission belt is configured to surround the V-shaped groove and the pre-formed groove; two frustoconical members regulate a surrounding radius of the transmission belt surrounding the V-shaped groove under control of pressure generated by the pressure pump; and the roller is fixed in an oscillating plate, and controls an oscillation amplitude of the home electrical equipment through the oscillating plate.