Kubota Corporation

Fumitake Okunishi

Seiji Ohkubo

Yukifumi Yamanaka

Go Takaki

Kozo Nishikawa

Yuji Kato

Takahiro Uchi

Seiji Norita

Takashi Okuyama

Masaki Hayashi

Hiroki Bessho

Yoshihiro Kawahara

Yasunobu Nakatani

Yoshifumi Horiuchi

Mitsugu Kobayashi

Shinichiro Saji

Yasutaka Kido

Disclosed is a shift power transmission apparatus for readily suppressing or avoiding size increase thereof. The apparatus includes an input shaft () receiving engine drive force, a hydraulic continuously variable transmission () driven by the input shaft (), a planetary power transmission section () combining drive force from the input shaft () and output from the hydraulic continuously variable transmission () for outputting the combined drive force, and an output rotary member () outputting power to a travel apparatus. The planetary power transmission section () and the output rotary member () are arranged on a side of the hydraulic continuously variable transmission () associated with an engine-coupled side of the input shaft (). The drive force is inputted to the planetary power transmission section () from a portion between the engine-coupled side and the hydraulic continuously variable transmission-coupled side of the input shaft ().

Shift power transmission apparatus and travel power transmission device

A hydraulic actuator is arranged such that the hydraulic actuator operates a swash plate of a hydraulic motor by a first pilot pressure and a second pilot pressure, the first pilot pressure being branched from a high-speed oil passage and applied to the hydraulic actuator for operating the swash plate of the hydraulic motor to a low speed side, the second pilot pressure being branched from a charge pump and applied to the hydraulic actuator for operating the swash plate of the hydraulic motor to a high speed side.

Work vehicle

A work vehicle includes a hydrostatic continuously variable speed-change device, a gear type multiple-stage speed-change device disposed downstream of the hydrostatic continuously variable speed-change device with respect to a direction in which power is transmitted, first and second oil passages, a bypass oil passage communicating the first and second oil passages with each other, a valve mechanism for opening and closing the bypass oil passage, and a manual operating member provided in a driving section for opening and closing the valve mechanism.

Operating apparatus for hydrostatic continuously variable speed-change device for work vehicle

Growing community of inventors

Sakai, Japan

Fumitake Okunishi