Embodiments of the present disclosure describe a drive pulley for a continuously variable transmission including a stationary sheave with a stationary shaft, a movable sheave axially movable relative to the stationary sheave and in contact with the stationary shaft; a spider in contact with at least the moveable sheave and stationary shaft; a spring member, biasing the movable sheave axially away from the stationary sheave; at least one centrifugal actuator including an arm pivotally connected to one of the movable sheave and the spider, the arm pivoting away from the one of the movable sheave and the spider as a speed of rotation of the drive pulley increases, the arm pushing against another one of the movable sheave and the spider as the arm pivots away from the one of the movable sheave and the spider, thereby moving the movable sheave axially toward the stationary sheave, the at least one centrifugal actuator being disposed radially outward of the stationary sheave shaft; and a torque transfer assembly operatively connected to at least one of the spider and the movable sheave, the torque transfer assembly transferring torque between the spider and the movable sheave, the torque transfer assembly including, a torque bearing assembly and at least one roller assembly, positioned on a helixed torque pin, the torque pin connected to the spider; wherein as the roller assembly wears, the at least one roller assembly tracks along a helixed path of the torque pin in a distal direction from the bearing assembly.

A rewinding waterwheel includes a secondary body, a main body and guide members. The main body includes a rewinding waterwheel frame, a hub ring shaft and a water pipe wound around the hub ring shaft. The hub ring shaft is installed onto the rewinding waterwheel frame and rotatable. The secondary body includes a waterwheel frame and a sprinkler head mounted onto the waterwheel frame. The water pipe is fixed and communicated to the sprinkler head; the guide member is installed on the ground; the water pipe is in a rolling contact with the outer circumferential surface of the guide member. In a water spray method of the rewinding waterwheel, a traveling path is designed to achieve automatic lawn irrigation by the guide member in contact with the water pipe and to change the irrigation speed by the transmission gearbox to control water volume and save energy.

A pulley propulsion device for an automatic transmission, which includes a fixed pulley, and a movable pulley constituted capable of relative displacement along a rotation axis of a pulley with respect to the fixed pulley, is provided. The pulley propulsion device includes a movable member constituted capable of relative rotation around a rotation axis of the pulley with respect to the movable pulley, a fixed member whose rotation with respect to a pulley case is regulated and adapted to give linear displacement to the movable member along the rotation axis of the pulley on the basis of rotation thereof, a driving mechanism having an electric motor and adapted to cause an output torque of the electric motor to be transmitted to the movable member and to cause the movable pulley to generate a predetermined pulley thrust, and a load sensor adapted to detect a load applied on the fixed member.

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT). In one embodiment, a control system is adapted to facilitate a change in the ratio of a CVT. In another embodiment, a control system includes a stator plate configured to have a plurality of radially offset slots. Various inventive traction planet assemblies and stator plates can be used to facilitate shifting the ratio of a CVT. In some embodiments, the traction planet assemblies include planet axles configured to cooperate with the stator plate. In one embodiment, the stator plate is configured to rotate and apply a skew condition to each of the planet axles. In some embodiments, a stator driver is operably coupled to the stator plate. Embodiments of a traction sun are adapted to cooperate with other components of the CVT to support operation and/or functionality of the CVT. Among other things, shift control interfaces for a CVT are disclosed.

A primary clutch assembly for a continuously variable transmission is provided. The primary clutch assembly includes a fixed sheave and a movable sheave centered on a post for joint rotation therewith. A rotational unit disposed on the post generates centrifugal forces during rotation of the post that are translated axially to urge the movable sheave along the post towards the fixed sheave. The primary clutch utilizes an actuator assembly that is configured to establish a locked condition that prevents axial movement of the movable sheave as the rotational unit builds-up centrifugal force and an unlocked condition to allow sudden axial movement of the movable sheave towards the fixed sheave. The actuator assembly includes a bearing unit that extends through a hole in the post to contact the movable sheave in the locked condition and is housed within the hole and spaced from the movable sheave in the unlocked condition.

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.

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT). In one embodiment, a main axle is adapted to receive a shift rod that cooperates with a shift rod nut to actuate a ratio change in a CVT. In another embodiment, an axial force generating mechanism can include a torsion spring, a traction ring adapted to receive the torsion spring, and a roller cage retainer configured to cooperate with the traction ring to house the torsion spring. Various inventive idler-and-shift-cam assemblies can be used to facilitate shifting the ratio of a CVT. Embodiments of a hub shell and a hub cover are adapted to house components of a CVT and, in some embodiments, to cooperate with other components of the CVT to support operation and/or functionality of the CVT. Among other things, shift control interfaces and braking features for a CVT are disclosed.

A driving-side pulley includes a cam mechanism that presses a movable sleeve in a first direction by utilizing a relative rotation of the movable sleeve in the normal direction with respect to an axis-line-direction fixed member, the first direction being a direction that has a pressing surface pressed against a corresponding side surface of a belt.

A continuously variable transmission (CVT) comprises a shaft rotatable about an axis, and variator assembly, and an actuator mechanism. The variator assembly includes a pulley supported on the shaft and having a ramp surface, and an endless rotatable device frictionally engaged with the pulley. The ramp surface inclines in an axial direction along the axis toward the endless rotatable device. The CVT further comprises an actuator mechanism that includes a wedge component that has a wedge surface interfacing with the ramp surface, and a rotary piston operatively connected to the wedge component. The rotary piston defines a first fluid chamber pressurizable to apply a rotational force that provides relative motion between the ramp surface and the wedge surface resulting in a wedge force on the ramp surface and a clamping force of the endless rotatable device on the pulley.

Provided herein is a continuously variable planetary (CVP) having a plurality of balls, each ball having a tiltable axis of rotation, each ball in contact with a first traction ring and a second traction ring, the CVP including a carrier assembly supporting each ball, the carrier assembly comprising a first carrier member and a second carrier member; an idler located radially inward of, and in contact with, each ball; and a first axial positioning mechanism coupled to the idler and the first carrier member, wherein the first axial positioning mechanism adjusts the axial position of the idler during operation.