Speed reducing or increasing planetary gear apparatus
US4843911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1988 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Apr 12, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2001/322
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A planetary gear apparatus includes: an external gear mounted on an input shaft with an eccentric member and a bearing fitted onto the eccentric member therebetween; an internal gear engaging with the external gear, the internal gear being coaxial with respect to the input shaft; an output shaft for outputting a reduced rotational force; and a drive for coupling the external gear and the output shaft. The planetary gear apparatus is adapted to transmit the rotational force of the input shaft to the output shaft after it has reduced the speed thereof, or to transmit the rotational force of the output shaft to the input shaft after it has increased the speed thereof, by fixing the internal gear. The external gear has a ring-like shape. The inner peripheral surface of the external gear is provided with a hole into which the bearing that is fitted on the eccentric member is fitted, and splines are formed on the insertion hole over the entire external gear in such a manner that they are coaxial with respect to the external gear. The bearing having a width shorter than that of the splines is fitted into one end side of the bearing insertion hole, and the drive having an end provided with…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.