| 摘要 |
PURPOSE:To extend exibition of the performance of a four-wheel drive and improve its acceleration and steering stability by keeping a viscous coupling in a locked condition at the start and the acceleration of a vehicle, thus setting the vehicle in the state of four-wheel drive. CONSTITUTION:A damper case 31 is fixed in one body to a final gear 10 with a plural number of engaging protrusion 33 protruded around the outside circumference of the differential case 32 of a differential mechanism 11 inside the damper case 31 and the engaging protrusion 33 engages with a recess 34 of a wider width than that of the engaging protrusion 33 on the internal circumference of the damper case 31. Further, a damper rubber 35 and a damper rubber 36 are provided on both sides of the engaging protrusion 33 to rotate the damper case 31 through the damper rubber 35 and the damper rubber 36 relatively to the differential case 32 when the transmission torque makes a sudden increase.
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