| 摘要 |
A differential gear that can switch from differential movement state to limited differential movement has: a pair of pressure rings 12 in a differential case 11 able to move in the direction of the axles but unable to rotate relatively; clutches 16 on opposite sides of the pressure rings 12 that limit differential movement between the left and right axles 1 by limiting the relative rotation of the differential case 11 and side gears 15; the pressure rings 12 are urged so as to decrease the clearance 17 between the pressure rings 12 but the clearance is increased by relative rotation torque between the pinion shaft 13 and differential case 11 in a differential state.
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