PLANETARY GEAR DEVICE

WIPO Patent Application WO/1999/025992

A1

A planetary gear device (20) comprises a first-stage side planetary gear mechanism (22) and a second-stage side planetary gear mechanism (23). The first-stage side planetary gear mechanism (23) includes an internal gear (25), a carrier (29) rotatably supported by a pair of main bearings (26, 27) disposed on both sides of the internal gear (25), a plurality of planetary gears (31) rotatably supported round a plurality of planetary shafts (30) extending between a pair of right and left carrier portions (28A, 28B) of the carrier (29), a sun gear (33) provided round the outer circumference of a pinion shaft (32) extending in the axial direction of the gear device through the carrier (29), and an output shaft (34) connected to the carrier (29) and extending in the direction of the axis (20a) of the gear device. The carrier (29) and the output shaft (34) are formed as a unitary member, and a pin so driven as to extend between the portions (28A, 28B) of the carrier (29) fabricated as the unitary member is used as the planetary shaft (30). Therefore, the planetary gear device (20) has a reduced number of components, can be produced easily and has high assembly accuracy.

TANIOKA YOSHIHIRO (JP)
SHIROKOSHI NORIO (JP)
NAKAGAWA HIROSHI (JP)
KAMEDA HIROSHI (JP)
AOYAGI HARUSHIGE (JP)

PCT/JP1997/004223

May 27, 1999

November 19, 1997

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HARMONIC DRIVE SYSTEMS (JP)
TANIOKA YOSHIHIRO (JP)
SHIROKOSHI NORIO (JP)
NAKAGAWA HIROSHI (JP)
KAMEDA HIROSHI (JP)
AOYAGI HARUSHIGE (JP)

F16H1/46; F16H1/28; (IPC1-7): F16H1/28

JPS52156876U	1977-11-29
JPH0545297U	1993-06-18
JPS6250690B2	1987-10-26
JPH0311129U	1991-02-04
JPH01153840A	1989-06-16
JPH0431322U	1992-03-13
JPH0291236U	1990-07-19

See also references of EP 0957291A4
None

Yokozawa, Shiro (6th floor 943, Shimadach, Matsumoto-shi Nagano, JP)

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