Vibration-reduced brush holder for an electric motor
US9640929B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 2012 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Dec 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R39/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brush holder for an electric motor includes a brush magazine forming a receiving space with a wall surface. A carbon brush having an end face and a side face is arranged in the receiving space. The brush holder also includes a spring, which is in contact with the end face and is configured to press the carbon brush in an extension direction of the receiving space. The brush holder also includes a pressing mechanism arranged on a pivot arm and configured to contact the side face and press the carbon brush by the force of the spring in a pressing direction against the wall surface. The pivot arm has a pivot shaft, to which an inner end of the spring is fastened. The pressing mechanism has a rolling surface configured to roll over the side face of the carbon brush when the carbon brush slides in the extension direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.