Flat wave gear drive
US5850765A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1997 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Feb 26, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flat wave gear drive (1) which has an input shaft (4) supported rotatably at both ends portions thereof between first and second end plates (2, 3). A wave gear mechanism is incorporated between these end plates (2,3), and a cross roller bearing (8) is provided on an outer circumferential side of the wave gear mechanism. The wave gear mechanism comprises a rigid internal gear (5), a silk-hat-shaped flexible external gear (6) provided on the inner side of the internal gear, and an wave generator (7) provided on the inner side of the external gear (6). An annular boss (64) of the flexible external gear is held between an outer ring (81) of the cross roller bearing (8) and the second end plate (3), whereby these three members are fastened to one another. The rigid internal gear (5) is held between an inner ring (82) of the cross roller bearing (8) and the first end plate (2), whereby these three members are fastened to one another. The input shaft (4) may comprise a hollow shaft. Owing to the employment of such a structure, the device as a whole can be formed flat and to a length slightly larger than the axial length of the flexible external gear. Since the outer ring of the cross ro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.