| 摘要 |
PURPOSE:To remarkably reduce or prevent noise which is created between internal and external spline gears when a torque is fluctuated, by resiliently energizing the internal and external spline gears in the circumferential direction. CONSTITUTION:A pair of the first and the second linear spring 30 and 30a are synmetrically arranged. Those opposite ends 32, 32a are engaged in notches 33 and 33a, respectively, and mounting parts 31 and 31a are engaged in annular grooves 32 and 32a, respectively. Then, linear springs 30 and 30a stretch axially over both sides of a coupling sleeve 15. Intermediate parts 33 and 33a abut spline gears 13b and 14 b of the first and the second external spring 13a and 14a, respectively and serveas pressure part for pressing the external spline gears 13b and 14b. A separating distance l between the intermediate parts 33 and 33b in their natural configurations, is determined longer than the root width l1 between the external spline gears 13b and 14b. |
