| 摘要 |
PROBLEM TO BE SOLVED: To efficiently arrange a pair of hydraulic actuators for steering a vehicle, an auxiliary hydraulic pump body, and an HST in a transmission case acting as an oil source for the auxiliary hydraulic pump body, and install a filter member in the transmission case while preventing the transmission case from being increased in size. SOLUTION: In an auxiliary hydraulic pump unit, the auxiliary hydraulic pump body is disposed at the rear of the transmission case in the state of being operably driven by an HST pump shaft. The transmission case comprises a main space storing a mechanical transmission mechanism and a pair of transmission/cutting-off/braking switching mechanism and a swelled space swelled rearward from the main space on the lower side of the auxiliary hydraulic pump unit so as to be overlapped with the auxiliary hydraulic pump unit in plan view. The transmission is so formed that a stored oil in the transmission case is sucked by the auxiliary hydraulic pump body through the filter member stored in the swelled space. COPYRIGHT: (C)2007,JPO&INPIT
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