Kubota Corporation

Masaru Andou

Minoru Hiraoka

Atsushi Hayashi

Masakazu Hino

Yoshirou Takao

A transmission apparatus for a tractor is operable to transmit a forward drive force in a wide speed changing range to the traveling device and which is operable also to transmit a reverse drive force to the traveling device. A planetary transmission section is configured to output the forward drive force in whichever case a hydrostatic stepless speed changing section is speed-changed to a forward rotation speed change state or a reverse rotation speed change state. A low speed transmission clutch couples a low speed side speed changing gear to a counter shaft to be rotatable therewith. A high speed transmission clutch couples a high speed side speed changing gear to the counter shaft to be rotatable therewith. A reverse transmission clutch couples a reverse transmission gear to an output shaft to be rotatable therewith.

Transmission apparatus for a tractor

Disclosed is an apparatus including a stepless speed change device receiving an engine drive; a planetary transmission device for, by a plurality of planetary transmission mechanisms, combining an output from the stepless speed change device and the engine drive not subject to a speed change by the stepless speed change device; and a speed range setting device for outputting the drive combined by the planetary transmission device and divided into a plurality of speed ranges. The planetary transmission device, the speed range setting device and a forward-reverse changeover device are located forwardly of a rear end of an upstream transmission case portion. An electric motor may be used instead of the stepless speed change device.

Growing community of inventors

Kawachinagano, Japan

Masaru Andou