| 摘要 |
PURPOSE:To prevent winding up caused by bending resistance torque of a universal joint so as to reduce noise as well as oscillation by acting rolling displacement caused by the bending torque of the universal joint provided at an axle of drive wheels in the reverse direction with rotation torque of thrust shaft, and thereby cancelling the rotation force of the thrust shaft with the bending resistance torque in a housing. CONSTITUTION:When the rotation force of an engine is transmitted to a drive shaft 3 via a thrust shaft, the rotation is transmitted to drive wheel 1 axles 9L, (R via a differential gear 7 and a viscousity clutch 8. In this case, in order to prevent generation of winding up of a final decelerator 1, in a controller 13, an up retrieval is carried out based on detection signals of a vehicle speed sensor 14 and an accelerator opening sensor 15 to determine an excitation current supplied to a magnet 11, thereby outputting a command signal to a power source 12. Accordingly, restraining force is generated between a permanent magnet 10 and the electromagnet 11 so that a housing 2 and a flange 4 is restrained each other in the rotational direction and thus a part of the rotation torque a thrust shaft is transmitted to the housing 2. As a result, the torque of the thrust shaft acts on the housing 2 in the direction to that of the bending resistance torque.
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