A continuously variable transmission system having a first adjustable pulley and a second adjustable pulley, a belt being around an outer surface of both the first and the second pulley, and a CPU programed to signal a motor to adjust the first adjustable pulley and second adjustable pulley according to a user input is provided.

A pulley assembly is provided for mounting on a rotatable shaft of an agricultural harvester and is operable in a high-speed configuration or a low-speed configuration. The pulley assembly comprises a high-speed pulley with a high-speed running surface for receiving a drive belt when the pulley assembly is in the high-speed configuration and a low-speed pulley with a low-speed running surface for receiving a drive belt when the pulley assembly is in the low-speed configuration. The pulley assembly has three sets of teeth extending from surfaces of the two pulleys. In the low-speed configuration, the running surfaces of the low-speed pulley and high-speed pulley are axially aligned and the first set of teeth and the second set of teeth are engaged. In the high-speed configuration, the running surface of the high-speed pulley is exposed for receiving the drive belt.

Disclosed is a pulley having: a shaft; a first shroud, called the fixed shroud, mounted so as to be unable to move in translation with respect to the shaft; a second shroud, called the movable shroud, mounted to be driven in rotation by the shaft but is able to move longitudinally with respect to the latter; a mechanism for mechanically controlling the longitudinal movement of the second shroud with respect to the shaft, having: —a first assembly, which is mounted on the shaft and driven in rotation by the latter, —a second assembly, which is mounted on the shaft by way of at least one torsion spring such that the relative angular position of the second assembly with respect to the shaft depends on the torque transmitted by the shaft, and —a device for locking in at least one position between the first assembly and the second assembly.

Disclosed is a pulley having: a shaft; a first shroud, called the fixed shroud, mounted so as to be unable to move in translation with respect to the shaft; a second shroud, called the movable shroud, mounted to be driven in rotation by the shaft but is able to move longitudinally with respect to the latter; a mechanism for mechanically controlling the longitudinal movement of the second shroud with respect to the shaft, having: —a first assembly, which is mounted on the shaft and driven in rotation by the latter, —a second assembly, which is mounted on the shaft by way of at least one torsion spring such that the relative angular position of the second assembly with respect to the shaft depends on the torque transmitted by the shaft, and—a device for locking in at least one position between the first assembly and the second assembly.

A primary clutch of a continuously variable transmission with a launch mechanism is provided. The primary clutch includes a central post, a fixed sheave assembly, a movable sheave assembly and a locking mechanism. The central post is configured to receive rotational torque from a motor. The fixed sheave assembly is statically mounted on the central post. The movable sheave assembly is mounted on the central post. The movable sheave assembly includes a movable sheave system that is configured to move axially on the central post towards the fixed sheave assembly as RPM of the primary clutch increase. The locking mechanism is configured and arranged to selectively prevent movement of the movable sheave system independent of the RPM of the primary clutch.

A CVT transmission device (1) comprises a drive pulley (4) provided with a mobile bushing (9), a fixed bushing (11), a cam system (95,111; 97,113) comprising at least one driven cam portion (95) of mobile bushing (9) and a cam portion (111) of the fixed bushing (11). The mobile bushing (9) comprises a main wall (91) annular with respect to the axis of rotation (X), having an inner surface (91a) which delimits a housing compartment (91c) and said driven cam portion (95) protrudes radially internally from said inner surface (91a). The drive cam portion (111) of the fixed bushing (11) is suitable to penetrate axially in said housing compartment of the mobile bushing (9).

A damper apparatus for a belt element of a belt transmission includes a sliding surface, a bearing receptacle, a first rail half and a second rail half. The sliding surface is arranged to contact a strand of the belt element to dampen the belt element. The bearing receptacle is arranged to align the sliding surface with the strand such that the sliding surface defines a strand travel direction, normal to a transversal direction. The first rail half has a first plunge opening with a first hook lid, and the second rail half has a second plunge opening with a second hook lid. The first rail half and the second rail half are interlockingly connected in contact to each other crosswise to the strand travel direction, and the first hook lid is arranged to plunge into the second plunge opening behind the second hook lid in a gripping manner.

A CVT transmission device (1) comprises a drive pulley (4) provided with a mobile bushing (9), a fixed bushing (11), a cam system (95,111; 97,113) comprising at least one driven cam portion (95) of mobile bushing (9) and a cam portion (111) of the fixed bushing (11). The mobile bushing (9) comprises a main wall (91) annular with respect to the axis of rotation (X), having an inner surface (91a) which delimits a housing compartment (91c) and said driven cam portion (95) protrudes radially internally from said inner surface (91a). The drive cam portion (111) of the fixed bushing (11) is suitable to penetrate axially in said housing compartment of the mobile bushing (9).

A spider is screwed to a drive shaft, includes a first screw that advances in one direction of an axial direction of the drive shaft when the spider rotates relative to the drive shaft in one direction of a circumferential direction, and is fastened to the drive shaft by the first screw. A nut is screwed to the drive shaft, includes a second screw that advances in the other direction of the axial direction of the drive shaft when the nut rotates relative to the drive shaft in one direction of the circumferential direction, and is fastened to the drive shaft by the second screw.

A continuously variable transmission device (1) for a two-, three- or four-wheel motorcycle comprises a gear shift regulation device provided with a slide (40) axially slidable and suitable to engage special rollers (18) to hold them during the gear shift. A mobile bushing (9) is suitable to influence the slide (40) to cause its translation from a rearward position to a forward limit position to engage the special rollers (18).