Differential gear
US5897453A · kind A · utility
Inventor
Key dates
| Filing date | Apr 17, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Apr 17, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H48/147
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention provides a differential gear capable of constantly ensuring a stable differential motion restricting force even in the case of a low rotational speed. In the present invention, when there occurs a difference in rotational speed between output side rotary elements, rollers are allowed to roll while being in contact with the confronting faces of the input side and output side rotary elements. The rollers move along rotational trajectories of the output side rotary elements while being restricted by a holder element from rolling toward the direction inclined by a predetermined angle relative to the rotational trajectories of the output side rotary elements. Thus, there occurs a frictional force between the rollers and the contact faces therewith, which results in a resistance to restrict the differential motion, At that time, the rollers generate a sliding friction in the course of rolling, thereby always ensuring a stable frictional force based on a dynamic friction even at a low rotational speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.