Kubota Corporation

Seiji Ohkubo

Fumitake Okunishi

Yukifumi Yamanaka

Go Takaki

Takahiro Uchi

Seiji Norita

Yuji Kato

Kozo Nishikawa

Takashi Okuyama

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

Growing community of inventors

Sakai, Japan

Seiji Ohkubo