Worm reduction gear and steering system
US9878735B2 · kind B2 · utility
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1References
2Claims
0Family size
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Inventor
Key dates
| Filing date | May 9, 2016 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | May 9, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H55/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A worm reduction gear satisfies following relational Formula (1) and Formula (2):3≧D2/D1≧1.7 (1)0.1°≦α−β≦0.5° (2)where D1 is an outside diameter of a worm, D2 is an outside diameter of a hob for cutting a worm wheel to form tooth spaces, and α is a pressure angle of the worm wheel and β is a pressure angle of the worm at an intermeshing pitch circle of the worm and the worm wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.