| 摘要 |
PROBLEM TO BE SOLVED: To prevent the cavitation from occurring in a hydraulic motor. SOLUTION: The right and left drive force distributing device 1 is comprised of a planetary gear differential 20 to distribute and transmit power to right and left axle shafts 3, 4, the hydraulic motor 40 to impart relatively rotational force to the axle shafts 3, 4, and a hydraulic mechanism 60 to rotate and drive this. The hydraulic motor 40 is comprised of a cylinder block 43 connected to the front end of the axle shaft 3, and a cam ring 47 arranged outside there. The hydraulic mechanism 60 is comprised of an operating control valve 63 to control the supply and discharge of working fluid into the hydraulic motor 40, a pump oil passage 65, provided with a hydraulic pump 61 to communicate to a tank T and the operating control valve 63, a tank oil passage 67, provided with a second throttle 75, and communicated to the tank T and the operating control valve 63, a return oil passage 69, provided with a pressure control valve 77 and the first throttle 73, branched from the pump oil passage 65, and communicated to the tank T, and a bypass oil passage 71 to communicate the return oil passage 69 and the tank oil passage 67. COPYRIGHT: (C)2006,JPO&NCIPI
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