Title:
LUBRICANT SEALING STRUCTURE, WAVE-MOTION GEAR DEVICE, AND ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2021/205666
Kind Code:
A1
Abstract:
A wave-motion gear device (1) has a lubricant sealing structure that prevents a lubricant from leaking to the outside through a gap portion (21) between a hollow input shaft (4) and an end plate (2). The lubricant sealing structure includes an oil-repellent surface formed on the surface portion facing the gap portion (21), an oil seal (20) that seals the gap portion (21), and an oil film forming surface formed at a lip tip surface (20c) of the oil seal (20). The oil-repellent surface has a surface texture in which first fine grooves are formed in a predetermined pattern so that an oil-repellent effect can be obtained with respect to the lubricant. The oil film forming surface has a surface texture in which second fine grooves are formed in a predetermined pattern so that an oil film forming effect of a seal lip grease can be obtained.
Inventors:
ORII DAISUKE (JP)
KOBAYASHI SYUHEI (JP)
KOBAYASHI SYUHEI (JP)
Application Number:
PCT/JP2020/016208
Publication Date:
October 14, 2021
Filing Date:
April 10, 2020
Export Citation:
Assignee:
HARMONIC DRIVE SYSTEMS (JP)
International Classes:
F16J15/3204; F16J15/324; F16J15/3244; F16J15/44
Domestic Patent References:
| WO2013121812A1 | 2013-08-22 | |||
| WO2018189798A1 | 2018-10-18 |
Foreign References:
| JPH09250611A | 1997-09-22 | |||
| JP2010180971A | 2010-08-19 | |||
| JPH10331985A | 1998-12-15 | |||
| JP2008223868A | 2008-09-25 | |||
| JP2006258234A | 2006-09-28 | |||
| JP2017214996A | 2017-12-07 | |||
| JP5465109B2 | 2014-04-09 |
Attorney, Agent or Firm:
YOKOZAWA Shiro (JP)
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