Rotary locking motor retainer in a transmission housing
US6727619B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Oct 25, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/116
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transmission housing includes a well, for receiving an electric drive motor, and a shaft hole, for receiving an idler gear shaft. The motor well is surrounded at its open end by a plurality of lugs formed in the housing and having inwardly-facing slots for receiving a motor retainer plate. The plate has a central opening for receiving and accurately positioning the motor. The retainer plate has a pattern of edge notches identical to the arrangement of the lugs but rotationally offset by an appropriate central angle. The plate is inserted axially past the lugs via the notches and then rotated through the central angle to engage the non-notched edge of the plate in the slots, thereby securing and positioning the motor in the well. A flange extending from the plate has a second hole precisely located at a distance from the plate center hole. With the plate rotated into motor-retaining position, the second hole is coaxial with the idler shaft hole. An idler shaft pressed into the second plate hole and the shaft hole in the housing is properly positioned with respect to the motor drive shaft and locks the retaining plate against rotating backwards from engagement with the lugs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.