Unit-type strain wave gearing device
US11566695B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2018 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | May 13, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2049/003
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A unit-type strain wave gearing device provided with a cross roller bearing that supports an internally toothed gear and an externally toothed gear in a state in which both gears can rotate relative to each other, and a meshing section of both gears is lubricated with grease. A gap by which the meshing section and the cross roller bearing raceway groove communicate is formed between the inner ring of the cross roller bearing and the external gear. Due to the pump effect caused by deflection of the external gear, grease is pushed from the meshing section to the gap. Some grease is returned to the inner space of the externally toothed gear via a grease-flowing hole that penetrates the diaphragm of the external gear. Thus, leakage of grease from an oil seal of the cross roller bearing to the unit side can be controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.