| 摘要 |
PROBLEM TO BE SOLVED: To obtain a secure differential limiting effect, by providing grooves extending continuously in the peripheral direction while bending alternatively in the axial direction, to the peripheral surfaces of output side rotary bodies, while dislocating the positions corresponding to the bending points each other. SOLUTION: When one side driving wheel loses the friction force with the road surface, for example, and when only one side drive shaft is made in the condition liable to rotate idly, the force to generate a rotation difference to cylinders 3 and 4 is applied only from one side cylinder, and as a result, at the other side of the cylinders 3 and 4, the balls 6 made in the driven side in the differential condition are liable to make the groove 3a or 4a at the active side, follow to their own movement. As a result the balls 6 receive a reaction from the groove 3a or 4a, and this reaction is operated as a force by a rolling friction and a sliding friction, so as to obtain a differential limiting effect.
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