Honda Giken Kogyo Kabushiki Kaisha

Masaie Katoh

Tsutomu Hayashi

Kazuhiko Nakamura

Yoshihiro Yoshida

Mitsuru Saito

Yoshihiro Nakajima

Nobuyuki Yakigaya

Akio Kobayashi

A shift control device in a hydrostatic continuously variable transmission in which a hydraulic closed circuit is formed between a swash plate type hydraulic pump and a swash plate type hydraulic motor, and a swash plate holder for supporting a motor swash plate of the hydraulic motor is tiltably supported on a stationary structure through a trunnion shaft fixedly mounted on the swash plate, wherein a drive shaft of a reversible electric motor is connected to the trunnion shaft through a reduction device which is constructed so that it transmits the rotation of the electric motor to the trunnion shaft at a reduced speed, but is brought into a locked state upon receipt of a reverse load from the trunnion shaft. This enables light adjustment of the tilting angle of the motor swash plate by use of a small-sized electric motor and reliable holding of the motor swash plate in a position at any angle.

Shift control device for hydrostatic continuously variable transmission

A transmission system including a main transmission and an auxiliary transmission. The main transmission includes at least two transmission trains of multiple gears mounted on respective parallel shafts so that the gears of different trains are selectively engageable. The auxiliary transmission includes a planetary system having an offset pinion gear, mounted on a carrier, engaged between an inner gear and an internally toothed outer gear. The carrier, inner gear and outer gear are coaxial with one of the shafts of the main transmission. The planetary gear system can be controlled so as to fix the rotation of the inner gear or to rotationally link the inner gear to the carrier, thereby providing two speed steps. All the shifting is controlled by one shifting drum.

Dual transmission system and its power shift mechanism

Growing community of inventors

Tokyo, Japan

Masaie Katoh