NONCIRCULAR BEARING, WAVE GENERATOR, AND WAVE GEAR DEVICE

WIPO Patent Application WO/2011/001474

A1

A wave generator (4) of a wave gear device (1) is equipped with a rigid cam plate (5) and a wave bearing (7). The wave bearing (7) comprises an oval orbit plane (5b) formed on the oval outer peripheral surface (5a) of the rigid cam plate (5), a flexible bearing ring (8) equipped with a circular orbital surface (8a), and multiple balls (10) inserted in the orbit (9) formed between oval orbit surface (5b) and circular orbital surface (8a). A ball insertion hole (11) is formed at the outer perimeter edge of the rigid cam plate (5) at a region above the minor axis Lmin of the oval where there is substantially no load; from here, the balls (10) are inserted into the orbit (9), after which the hole is closed by means of a plug (12). It is easy to insert the balls (10) through the ball insertion hole (11), and the service life of the bearing is not reduced by the formation of the ball insertion hole (11).

JP2759996	[Title of Invention] Power transmission device
JP2010249208	IN-WHEEL MOTOR DRIVE UNIT AND MOTOR DRIVE DEVICE FOR VEHICLE

KUROGI JUNICHI (JP)

PCT/JP2009/003085

January 06, 2011

July 02, 2009

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HARMONIC DRIVE SYSTEMS (JP)
KUROGI JUNICHI (JP)

F16H1/32; F16C33/58; F16C43/06

JPH051048U	1993-01-08
JPS6174936A	1986-04-17
JP2000004451Y
JPH04211718A	1992-08-03
JPH11325085A	1999-11-26

YOKOZAWA, Shiro (JP)
Shiro Yokozawa (JP)

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