Nissan Motor Company Limited

Mitsuo Ikkatai

Yukio Mizukoshi

Koji Nozawa

Kazuyoshi Fujioka

Norio Takegami

A wet multiple disc clutch device for a vehicle transmission, comprising: a clutch drum functioning as a power input, the drum having a plurality of drive grooves formed on the inner surface of said clutch drum; a plurality of device plates each having a plurality of projections which engage with the drive grooves; a plurality of driven plates connected to the output shaft of the vehicle transmission and interleaved with the drive plates; a piston actuated by a hydraulic control pressure and adapted to press the drive and driven plates in contact; and a conical plate disposed between an endmost of the drive plates and the piston, having at least one projection formed on the outer circumference thereof the projection being engaged with the drive grooves on the clutch drum.

Wet multiple disc clutch device for a vehicle transmission

The present invention relates to an automotive transmission for an industrial vehicle. The main shaft of the transmission gear is hollow and internally splined to be slidable along and synchronously rotatable with an externally splined input shaft. Upon removal of a snap ring which holds at least two gears and a synchronizer (disposed between the gears) in place on the main shaft and the removal of a lock pin which interconnects the main shaft and the input shaft, the main shaft can be slid toward the clutch allowing the gears and synchronizer to be slipped, one by one, off the end of the main shaft and readily replaced with new units.

Automotive transmission

A synchromesh device for a transmission of an industrial truck such as a fork lift truck includes a main shaft, forward and reverse change gears, synchronizing hub fixed to the main shaft by means of spline grooves, a coupling sleeve axially slidably engaged with spline grooves formed in the outer circumference of the synchronizing hub, and balk-rings formed in their inner surfaces with conical surfaces facing to conical surfaces formed in the side of a clutch gear integral with the forward change gear and of a clutch gear integral with the reverse change gear, respectively. According to the invention, conical angles of the conical surfaces are more than 10.degree. and preferably less than 11.degree., thereby reducing surface pressures acting between the synchronizing slide surfaces during the synchronization to improve the durability remarkably.

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Ohme, Japan

Mitsuo Ikkatai