Wave gear device

Details Wave gear device Wave gear device

2007-07-31

2007-07-31

Pang, Roger (Department: 3681)

Machine element or mechanism

Gearing

Reexamination Certificate

active

11161423

ABSTRACT:
A diaphragm of a cup-shaped flexible external gear of a cup-shaped wave gear device having a high reduction ratio of 100 or higher is given a thickness t in a position of a radius r of the diaphragm whereby the thickness t is a value that satisfies the expression A/r2when A is a constant. The constant A is preferably a value that satisfies the expression 0.0014 D3<A<0.0026 D3, where D is a pitch diameter of the flexible external gear, and the range of the radius r whereby the thickness t is defined as described above in the diaphragm is preferably set to satisfy the expression 0.6 d<r<0.4 D, where d is a diameter of a discoid rigid boss made continuous with an internal peripheral end of the diaphragm. Stress concentration can be alleviated, and it is possible for the allowable transmission torque to be increased compared to the prior art.

REFERENCES:
patent: 5269202 (1993-12-01), Kiyosawa et al.
patent: 5715732 (1998-02-01), Takizawa et al.
patent: 6050155 (2000-04-01), Tortora
patent: 6202508 (2001-03-01), Takizawa
patent: 6-017888 (1994-01-01), None
patent: 410159917 (1998-06-01), None

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