Kubota Corporation

Yuji Kato

Seiji Norita

Yukifumi Yamanaka

Go Takaki

Fumitake Okunishi

Takahiro Uchi

Seiji Ohkubo

Kozo Nishikawa

Takashi Okuyama

Satoshi Nishida

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

Provided is a combine with a speed-change power transmission apparatus including: a hydraulic static continuously variable transmission unit that receives an input of drive force from an engine, and subjects the drive force to speed change; and a planetary power transmission unit that combines the drive force from the engine and an output from the continuously variable transmission unit and outputs a combined drive force to a travelling apparatus, wherein a power transmission case can be made lighter at low cost. In this combine, a continuously variable transmission case portion of a power transmission case, which houses a continuously variable transmission unit, is formed integrally with a planetary power transmission case portion of the power transmission case, which houses a planetary power transmission unit. A partition that separates a continuously variable transmission compartment of the continuously variable transmission case portion and a planetary power transmission compartment of the planetary power transmission case portion from each other is provided within the power transmission case, the continuously variable transmission compartment housing the continuously variable transmission unit, and the planetary power transmission compartment housing the planetary power transmission unit.

Combine

Growing community of inventors

Sakai, Japan

Yuji Kato