| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pump motor and driving force distribution device for a vehicle capable of suppressing degradation of motor driving force or discharge pressure when a temperature is high. <P>SOLUTION: The device includes: a rotor 8 connected to a rear axle shaft so as not to be relatively rotated; a cam ring 8 for forming a hydraulic oil chamber 11 between itself and the outer peripheral face of the rotor 8; a pair of side plates 10 which face each other across the cam ring 8; and a casing 115 connected to a propeller shaft so as not to be relatively rotated. The casing 115 incorporates a plurality of vanes 9 which divide the hydraulic oil chamber 11, and a clearance 9 which becomes narrow as temperature rises, is formed between the rotor side end face of the side plate 10 and the side plate side end face of the rotor 8 and the vane 9. <P>COPYRIGHT: (C)2012,JPO&INPIT |
