| 摘要 |
A differential limiting device 10 for a vehicle is provided with a planetary gear mechanism 18 , in which a planetary carrier 27 rotatable bodily with a front housing 11 distributes the rotational power of the front housing 11 to a ring gear 28 and a sun gear 30 through planetary gears 29 and hence, to a first inner shaft 13 and a second inner shaft 14 which are rotatable bodily respectively with the ring gear 28 and the sun gear 30 . A pilot clutch 17 , when in friction engagement, brings about relative rotation between a cam ring 19 and the second inner shaft 14 to axially move the second inner shaft 14 by the action of a cam mechanism 21 provided therebetween. The axial movement of the second inner shaft 14 causes the first inner shaft 13 to be axially moved, whereby a main clutch 16 arranged between the front housing 11 and the first inner shaft 13 is brought into friction engagement. When in friction engagement, the main clutch 16 limits the relative rotation between the ring gear 28 and the planetary carrier 27 . With this construction, a reversal in motion transmission between the cam ring 19 and the second inner shaft 14 is completed earlier than a reversal in motion transmission of the main clutch 16 , so that the generation of a strange noise at the time of the reversal can be suppressed.
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