HST TYPE TRANSMISSION DEVICE AND BRAKING METHOD THEREOF AT NEUTRAL POSITION

Japanese Patent JP3613365

B2

PROBLEM TO BE SOLVED: To perform reliable traveling shift operation and steering turn operation, to improve reliability during the stop of a traveling device and bringing it into neutral and during straight advance wherein no turn steering operation is effected, to compact constitution, and to reduce a cost, in a HST type transmission device provided with an HST continuously variable transmission mechanism for traveling and an HST type continuously variable transmission mechanism for revolution and arranging two hydraulic pumps and two hydraulic motors.
SOLUTION: In this transmission, an HST transmission turn operation of a crawler type working machine is effected such that rotation is applied on a differential gear mechanism under transmission and by an HST type continuously variable transmission mechanism 28 for turn. In this case, a brake device during neutral is arranged on the output shaft of a turn hydraulic motor 27. Further, a brake device during neutral is formed such that a brake case formed such that a wet type multidisc mechanism and a solenoid valve are integrally formed is attached to a case for the HST continuously variable transmission mechanism for turn.

Yoshihiro Yomai
Kenji Shingu
Uki Katsumi
Kunihiko Sakamoto
Koji Sakata
Kengo Sasahara

JP21167896A

January 26, 2005

August 09, 1996

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Yanmar Co., Ltd.

A01D69/00; B60K17/10; B62D11/08; B62D11/18; F16H39/14; F16H61/448; (IPC1-7): B62D11/18; B60K17/10

JP7009681U
JP3169745A
JP2144249A
JP55076726U
JP54041027U
JP8142906A
JP10054452A
JP8156822A
JP4074169U

Juichiro Yano

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