Title:
STRAIN WAVE GEAR DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/024115
Kind Code:
A1
Abstract:
A strain wave gear device (1) comprises a hollow input shaft (5). A strain wave generator (4) that makes an external gear (3) flex in the radial direction so as to engage an internal gear (2) comprises a wave bearing (43) that has a ball retainer (47). An input shaft outer circumferential surface portion of the hollow input shaft (5) that is positioned on the inside of the external gear (3) is coated with an oil-repellent coating (14). The surface of the ball retainer (47) is also coated with an oil-repellent coating (15). The oil-repellent coatings (14, 15) lower the grease stirring resistance of the hollow input shaft (5) and the ball retainer (47) and make it possible to reduce loss torque at the strain wave gear device (1).
Inventors:
TAKIZAWA KENTA (JP)
Application Number:
PCT/JP2022/029395
Publication Date:
February 01, 2024
Filing Date:
July 29, 2022
Export Citation:
Assignee:
HARMONIC DRIVE SYSTEMS (JP)
International Classes:
F16H1/32
Foreign References:
| JP2018194094A | 2018-12-06 | |||
| JP2018053912A | 2018-04-05 |
Attorney, Agent or Firm:
YOKOZAWA Shiro (JP)
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