A clutch apparatus for a vehicle drive train for transmitting torque between the vehicle's engine and gearbox. Three interoperative clutch members are provided. The clutch members cooperate with clutch plates, a pressure-receiving plate, a clutch pressure plate, clutch pressure springs, and a setting device between the second and the third clutch members, for setting a back torque between the third and first clutch members by an axial displacement of the third clutch member relative to the second clutch member. The setting device has two ring elements, which are rotatable n relation to each other, with ramp segments, and having balls arranged between the ramp segments; the ramp segments have regions with ball that rise or slope in opposite directions in such a way that when the ring elements rotate in the same direction, the distance between the ramp segments is smaller than when the ring elements rotate in opposite directions.

A clutch apparatus for a vehicle drive train for transmitting torque between the vehicle's engine and gearbox. First, second, and third clutch members cooperate with clutch plates, a pressure-receiving plate, a clutch pressure plate, clutch pressure springs, and a setting device for setting a back torque. An engagement device provided between the second clutch member and the third clutch member for bringing about a releasable engagement position between the second clutch member and the third clutch member. The second clutch member has a tubular portion on which a tubular bearing sleeve of predetermined working length is provided, and which has a radially extending rotating collar with an abutment surface on which a spring device is arranged; the spring device is for axially loading the third clutch member, and limits the path of axial displacement of the third clutch member relative to the second clutch member.

A garden tool power system comprises a motor, a reducer and a transmission shaft. The motor transmits the power to the transmission shaft through the reducer to drive wheels on the transmission shaft to rotate. The reducer comprises a pinion connected to an output end of the motor and a gear engaged with the pinion. The transmission shaft includes left and right shafts connected with each other through a connecting shaft. The gear mounted on the connecting shaft has at least two guiding rods transversely located thereon and two centrifugal blocks located between the guiding rods. Each guiding rod has a spring surrounded therearound and each spring located between two centrifugal blocks has two opposite ends respectively abutted against the corresponding portions of the centrifugal blocks. A fixing sleeve provided on the periphery of the centrifugal blocks is mounted on the transmission shaft and has buckle structures matching with the centrifugal blocks.

A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.

A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.

A lubricating fluid damped anti-rotational system is provided comprising a pawl carrier having an axis of rotation and a radial aperture, a pawl pivotably mounted to the pawl carrier on a pivot joint, the pawl having a contact portion and a counterweight portion, a lubricating fluid jet configured to propel a lubricating fluid through the radial aperture toward the contact portion.

An automatic transmission multi-mode clutch module (10, 100) may include either two concentric (30B, 30A) or two axially (130B, 130A) spaced sets of pawls (30B, 130B, 30A, 130A) nested between a pair of inner (20, 120) and outer races (12, 112). A first set of pawls (30B, 130B) is secured to the outer race (12, 112), and may be selectively released from a normally spring-biased default engagement with the inner race (20, 120) by an actuator cam ring (16, 116) rotatable between two angular limits. A second set of pawls (30A, 130A) is secured to the inner race (20, 120), and is released from a normally spring-biased default engagement with the outer race (12, 112) whenever the inner race (20, 120) reaches a threshold rotational speed, at which centrifugal forces acting on the inner set of pawls (30A, 130A) overcome the default spring bias to disengage the pawls (30A, 130A) from the outer race (12, 112). In either the concentric or the axial arrangement, the two sets of pawls (30B, 130B, 30A, 130A) are configured to secure two clutch module races (12, 112, 20, 120) together in either locked, one-way, or unlocked operating modes.

An automatic transmission multi-mode clutch module (10, 100) may include either two concentric (30B, 30A) or two axially (130B, 130A) spaced sets of pawls (30B, 130B, 30A, 130A) nested between a pair of inner (20, 120) and outer races (12, 112). A first set of pawls (30B, 130B) is secured to the outer race (12, 112), and may be selectively released from a normally spring-biased default engagement with the inner race (20, 120) by an actuator cam ring (16, 116) rotatable between two angular limits. A second set of pawls (30A, 130A) is secured to the inner race (20, 120), and is released from a normally spring-biased default engagement with the outer race (12, 112) whenever the inner race (20, 120) reaches a threshold rotational speed, at which centrifugal forces acting on the inner set of pawls (30A, 130A) overcome the default spring bias to disengage the pawls (30A, 130A) from the outer race (12, 112). In either the concentric or the axial arrangement, the two sets of pawls (30B, 130B, 30A, 130A) are configured to secure two clutch module races (12, 112, 20, 120) together in either locked, one-way, or unlocked operating modes.

A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.

A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.