Drive apparatus constructed to detect ratcheting in wave motion gearing speed reducer
US9476354B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2013 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Dec 16, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2057/018
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A wave motion gearing speed reducer (20) is disposed between a driving motor (15) and a control shaft (11) of a variable compression ratio mechanism. There are provided a input shaft rotation sensing sensor (31) to sense the rotational position of an input shaft (16) of the speed reducer (20), and an output shaft rotation sensing sensor (32) to sense the rotational position of an output shaft (12) of the speed reducer (20). When a discrepancy quantity (Δε) between sensed quantities of both sensors is greater than or equal to a predetermined value, a judgment is made that a ratcheting of slippage of an engaging position between internal teeth (22) and external teeth (25) is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.