| 摘要 |
PURPOSE:To eliminate a severe limitation for preventing the rotary unbalance of a rotation difference sensitive joint by integratedly forming one side of two members of a relatively rotatable hydraulic coupling on one side side gear of a differential gear, and connecting the other side of the two members to an output shaft on the side gear side. CONSTITUTION:In a front-wheel drive base four-wheel drive vehicle, motive power from a transmission output gear is made to be transmitted to a rear differential device 14 from a rear propeller shaft 11 via a drive pinion 12 and a ring gear 13. Then constitution is made in which motive power can be transmitted to a right rear wheel from one side gear 15 of the rear differential device 14 directly via a rear drive shaft 16 and to a left rear wheel from the other side side gear 17 via an orifice coupling 18 (rotation difference sensitive joint) and a rear drive shaft 19. This can ease designing by eliminating the need for severely limiting the rotary unbalance of the orifice coupling 18 by giving low rotation, having passed a final reduction gear ratio with the rear differential device, to the orifice coupling 18.
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