To enhance the transmission efficiency of HST formed by a hydraulic pump body and both hydraulic motor bodies in a hydraulic drive type working vehicle in which a front side hydraulic motor body for operatively driving a front side drive wheel and a rear side hydraulic motor body for operatively driving a rear side drive wheel are fluid-connected to a single common hydraulic pump body in series.
The hydraulic motor body positioned at an upstream side in a flowing direction of HST operation oil at advancement of the vehicle of the both hydraulic motor bodies is constituted such that a free end of a piston is engaged with the corresponding swash plate through a shoe. Preferably, the hydraulic motor body positioned at a downstream side in the flowing direction of the HST operation oil at advancement of the vehicle of the both hydraulic motor bodies is constituted such that the free end of the piston is engaged with the corresponding swash plate through a thrust bearing.
SASAHARA KENGO
JP2005096700A | 2005-04-14 | |||
JPH05272637A | 1993-10-19 | |||
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US20040074686A1 | 2004-04-22 |
Minoru Ohnaka
Nobuo Ouchi
Satoshi Takada