| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a shock absorbing mechanism of a motor power transfer device wherein the number of components is small, an expensive motor is unnecessary, the cost is low, layout in a small space is possible as compact constitution, strict setting and management of a spring load are unnecessary. SOLUTION: A shaft guide 18 is fixed to a rotating shaft 6a of a motor 6. A shaft 19 to which a worm gear 9 is fixed is arranged on the axial extension line of the rotating shaft 6a. The shaft 19 is so constituted that rotation and movement in the axial direction are possible. A compression coil spring 26 energizing the shaft 19 to one side of the axial direction is installed. A shaft guide 18 is linked with the shaft 19 via a linkage means 21 constituted of engaging trenches 18b and engaging protrusions 19a. When the shaft guide 18 engages with the shaft 19 at the one side position energized by the coil spring 26, both of them rotate collectively, and the shaft 19 is displaced toward the other side of the axial direction in opposition to the energizing force of the coil spring 26, their engagement is broken and the shaft 19 rotates with no load.</p> |
