WAVE GEAR DEVICE HAVING WIDELY ENGAGING TOOTH PROFILE

WIPO Patent Application WO/2005/043006

A1

A wave gear device (1), wherein a rigid internal gear (2) is formed in a spur gear with a module m and a flexible external gear (3) is formed in a conical gear having an opening side front end with a module m. The number of the teeth of the external gear (3) is reduced by the quantity of 2n (n is a positive integer) less than that of the internal gear (2), and the amount of the deflection of the major axis of the elliptic rim neutral line of the external gear (3) is set to 2κ mn (κ > 1) at the opening side front end thereof. At the opening side front end, the engagement of the teeth of both gears (2, 3) is approximated by the engagement of a rack to obtain the moving route (M) of the teeth of the external gear (3) according to the rotation of a wave generator (4), and the curved portion (AB) of the mounting route (M) ranging from the deepest engaged position (A) of both gears where the inclination angle of the moving route (M) relative to the radius line of the internal gear (2) is 90º to a position (B) where the inclination angle is &agr is obtained in an area ranging from the major axis to a tooth departing side. Then, a first analogous curve obtained by multiplying the curved portion (AB) by &lgr times is used as the tooth profile of the external gear (3), and a second analogous curve obtained by multiplying it by (&lgr + 1) times is used as the tooth profile of the internal gear (2).

ISHIKAWA SHOICHI (JP)

PCT/JP2004/007168

May 12, 2005

May 26, 2004

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HARMONIC DRIVE SYSTEMS (JP)
ISHIKAWA SHOICHI (JP)

F16H55/08; (IPC1-7): F16H1/32

WO1996019683A1

1996-06-27

JP2001146945A	2001-05-29
JPH09166186A	1997-06-24
JPH07293643A	1995-11-07
JPS63115943A	1988-05-20

Yokozawa, Shiro (Shimadachi Matsumoto-shi, Nagano 52, JP)

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