| 摘要 |
PROBLEM TO BE SOLVED: To prevent a cooling fan rotated and driven by a hydraulic motor from being the hindrance of a radiator passing air and from hindering cooling property at the time of a high speed traveling. SOLUTION: In the hydraulic motor M, a shaft 31 is made movable in the axial direction for a housing 10, the cooling fan F is supported at a front end part 31a of the shaft 31 projecting forward from the housing 10, a side plate 41 abutted slidably on rear end faces of both rotors 21, 22 within the housing 10 is made movable integrally with the shaft 31 in the axial direction, the side plate 41 is energized toward the front of an automobile by an energizing means (spring 42) by prescribed energizing force and the front end faces of both the rotors 21, 22 are made to be slidably abutted on a front end face of cylindrical space.
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