| 摘要 |
PURPOSE:To absorb fluctuation torque, by a method wherein the internal gear of a planetary reduction gear is resiliently supported to an external casing. CONSTITUTION:Flanges 40 and 41 are located to the outer peripheral surface of an internal gear 10, and containing holes 50 and 51 are formed in an outer casing 20. The flanges 40 and 41 are rotatably contained in the containing holes 50 and 51. Vertical holes 52a, 52b, 53a, and 53b are formed in the sides of the containing holes 50 and 51, and resilient support bodies 60 and 61 are attached between the vertical hole and the flange in a manner to be nipped therebetween. In the resilient support bodies 60 and 61, a coil spring may be used as a single body or may be formed with an air damper, having both ends engagedly attached by means of a plate and a pin, and a coil spring mounted therearound. This causes fluctuation torque to be absorbed through deformation of the resilient support bodies.
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