A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

A transmission unit for a motor vehicle transmission includes a spur gear (6) which is arranged rotatably on an intermediate shaft (5) and which can be fixed to the intermediate shaft (5) for the transmission of drive power via clutch means. On one side flank (9) of the spur gear, a first freewheel gear portion (10) is provided which can be connected to a corresponding shaft-side second freewheel gear portion (11) via an internally toothed sliding sleeve (12). On the opposite side flank (13) of the spur gear, a parking lock gear portion (14) is provided for engaging a pawl (15) to block the transmission unit when the vehicle is at a standstill.

A transmission having an integrated gear and brake mechanism is disposed in a housing, the transmission having a variable drive mechanism, gear train, and an output axle engaged to the gear train. The output axle is driven by a final drive gear having an integrated drum brake within its circumference.

[Problem] A power transmission unit that improves quietness of a gear mechanism and prevents a size of the unit from increasing when a brake rotor is installed around an input shaft of the gear mechanism.

[Solution] The power transmission unit includes an electric driving motor with a motor shaft, a gear mechanism, and an output shaft, which are accommodated in a transmission housing, wherein the power of the motor shaft is transmitted to the output shaft via the gear mechanism. The gear mechanism has a gear shaft rotatably supported on the transmission housing and a first helical gear provided on the gear shaft. The power transmission unit further includes a connecting member provided with a tubular portion fitted to the motor shaft and the gear shaft so as to allow the motor shaft and the gear shaft to synchronously rotate. The connecting member is integrally provided with a brake rotor on the outer periphery thereof.

Provided is a gear motor including a motor, a speed reducer, a first detector disposition section in which a first rotation detector that detects rotation of a rotor shaft is disposed, a second detector disposition section in which a second rotation detector that detects rotation of an output member of the speed reducer is disposed, and a third detector disposition section in which a torque detector is disposed, in which the gear motor is operable when the first rotation detector is disposed in the first detector disposition section, the second rotation detector is disposed in the second detector disposition section, and the torque detector is disposed in the third detector disposition section, and is operable even when a portion thereof is disposed.

A parking brake actuation system mounted to a tail shaft of a vehicle's transmission is operably connected to a brake assembly of the vehicle having brake pads housed within a brake drum. The parking brake actuation system includes a mounting bracket coupled to the tail shaft of the vehicle's transmission, an actuator coupled to the mounting bracket, and a bell crank coupled to the tail shaft of the vehicle's transmission and the actuator, and also connected to an engagement cam by a linkage assembly. Actuation of the actuator to a retracted position permits rotational movement of the bell crank to transfer through the linkage assembly to engage the pair of brake pads with the brake drum. Actuation of the actuator to an extended position permits rotational movement of the bell crank to transfer through the linkage assembly to disengage the pair of brake pads from the brake drum.

Regarding a travel power transmission apparatus for a tractor, in which a creep speed changing apparatus is housed in a transmission case, the present invention increases a deceleration ratio throughout the creep speed change while suppressing an increase in the size of the transmission case. A creep speed changing apparatus includes: a first power transmission gear that is provided on an output shaft gear of a gear transmission; a first deceleration gear that is supported by a relay shaft so as to be rotatable relative to the relay shaft, in a state of meshing with the first power transmission gear; a second power transmission gear that is provided on the first deceleration gear; a second deceleration gear that is supported by an output shaft of the gear transmission so as to be rotatable relative to the output shaft, in a state of meshing with the second power transmission gear; a third power transmission gear that is provided on the second deceleration gear; a third deceleration gear that is supported by the relay shaft so as not to be rotatable relative to the relay shaft, in a state of meshing with the third power transmission gear; and a pair of deceleration gears that are provided so as to span the relay shaft and the output shaft, and decelerate power from the relay shaft and transmit the resulting power to the output shaft.

An axle assembly having a differential assembly, a drive pinion, and a differential brake. The differential assembly may be rotatable about a differential axis. The drive pinion may mesh with a ring gear of the differential assembly. The differential brake may be operable to apply a brake torque to inhibit rotation of the differential assembly.

Regarding a travel power transmission apparatus for a tractor, in which a creep speed changing apparatus is housed in a transmission case, the present invention increases a deceleration ratio throughout the creep speed change while suppressing an increase in the size of the transmission case. A creep speed changing apparatus includes: a first power transmission gear that is provided on an output shaft gear of a gear transmission; a first deceleration gear that is supported by a relay shaft so as to be rotatable relative to the relay shaft, in a state of meshing with the first power transmission gear; a second power transmission gear that is provided on the first deceleration gear; a second deceleration gear that is supported by an output shaft of the gear transmission so as to be rotatable relative to the output shaft, in a state of meshing with the second power transmission gear; a third power transmission gear that is provided on the second deceleration gear; a third deceleration gear that is supported by the relay shaft so as not to be rotatable relative to the relay shaft, in a state of meshing with the third power transmission gear; and a pair of deceleration gears that are provided so as to span the relay shaft and the output shaft, and decelerate power from the relay shaft and transmit the resulting power to the output shaft.

A transmission assembly includes a common ring gear assembly, a first sun gear, a first planet carrier, a second sun gear and a second planet carrier. A set of planet gears of each one of the first and second planet carriers meshing with the common ring gear assembly. The set of planet gears of the first planet carrier meshing with the first sun gear and the set of planet gears of the second planet carrier meshing with the second sun gear. The transmission assembly further includes a transmission housing. The second sun gear is adapted to be connected to a transmission input shaft; the common ring gear assembly is adapted to be connected to a transmission output shaft, and the second planet carrier and the first sun gear are operatively connected to each other.