Patent ID: 6564677
Filing Date: 2003-05-20
Classification: F16H,Y10T

Abstract:
A wave gear drive including an annular rigid internal gear, an annular flexible external gear arranged inside of said annular rigid internal gear, and a wave generator fitted inside of said annular flexible external gear, in which said wave generator urges said flexible external gear radially so as to be partially in mesh with said rigid internal gear, and moves points of partial engagement in the circumferential direction so as to generate a relative rotation between said rigid internal gear and said flexible external gear corresponding to the difference in the number of teeth therebetween, wherein:said wave generator includes a rigid cam plate having a predetermined outline and a hub inserted into a fitting hole formed in a center of said rigid cam plate; and said wave generator further includes a transfer-torque control mechanism for limiting a torque transferred to said flexible external gear through said wave generator, said transfer-torque control mechanism being configured to fasten said rigid cam plate and said hub so as to generate a slip in a rotational direction by transferring a torque exceeding a predetermined value.