| 摘要 |
PURPOSE:To prevent interference between a helical pinion gear and a helical side gear, by setting a predetermined movable gap between a stopper ring attached to either one of the hub of a rotational speed difference sensitive type differential limiting coupling and a second helical side gear, and the other one in a direction in which helical side gears are separated from each other. CONSTITUTION:A circlip (stopper ring) 97 is fitted in a circumferential groove formed in a coupling part 73 of the hub of a rotational speed difference sensitive type differential limiting coupling. A predetermined movable gap (a) is set between the circlip 87 and a spline 77 of a helical side gear 39 in a direction in which a helical side gear 37 is separated from the helical side gear 39 together with the coupling part 73 as indicated by the arrow 99. Further, a gap (b) is obtained between the helical side gear 39 and a second gear part 51 of a helical pinion gear 45. This movable gap (a) is set to be smaller than the gap (b). With this arrangement, the circlip 97 makes contact with the spline 77 so as to exhibit a stopper function even though the helical side gears 37, 39 are moved being separated from each other by a striker.
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