STRAIN WAVE GEARING AND METHOD FOR MANUFACTURING MULTI-LAYER HOLLOW BODY

摘要

A wave plug of a wave generator of a wave gear device includes: a metallic outer hollow body with an elliptical wave plug outer circumferential surface formed thereon; a metallic inner hollow body with a wave plug inner circumferential surface formed thereon; and an intermediate hollow body sandwiched between the outer hollow body and the inner hollow body. The intermediate hollow body includes CFRP layers. It is possible to implement a light wave plug in which a big hollow portion can be formed while assuring a required rigidity. Using the wave plug makes it possible to implement a light wave gear device which allows jumping to occur at a high load torque and which includes a big hollow portion.

主权项

1. A strain wave gearing Comprising:
a rigid internally toothed gear; a flexible externally toothed gear; and a wave generator for causing the flexible externally toothed gear to flex into a non-circular shape and partially mesh with the rigid internally toothed gear, and causing meshing positions between the two gears to move in a circumferential direction, wherein the wave generator has a hollow wave plug formed with a plug outer-circumferential surface in a non-circular shape, and a wave bearing mounted on the plug outer-circumferential surface; at least one of the rigid internally toothed gear and the wave plug is formed from a multi-layer hollow body; the multi-layer hollow body has an outer hollow body made of metal, an inner hollow body made of metal, and an intermediate hollow body sandwiched between the outer hollow body and the inner hollow body; and the intermediate hollow body has: a first hollow body made of metal; a first carbon-fiber-reinforced plastic layer sandwiched between an outer-circumferential surface of the first hollow body and an inner-circumferential surface of the outer hollow body; and a second carbon-fiber-reinforced plastic layer sandwiched between an inner-circumferential surface of the first hollow body and an outer-circumferential surface of the inner hollow body.