Electric motor sleeve bearing assembly with acoustic/vibration decoupling and endplay adjustment
US6998746B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2004 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Jun 10, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor includes an armature structure 12 having a shaft 14, a lamination stack 11 coupled with the shaft, a commutator 16 coupled with the shaft, and windings 13 carried by the lamination stack and connected to the commutator. Brushes 17 engage the commutator to deliver electric current to the windings. The motor includes a frame structure 18 and permanent magnets 19 carried by the frame structure. At least one assembly is provided including a sleeve bearing 22, an elastomer structure 24 coupled with the sleeve bearing, and a retainer 26. The sleeve bearing is operatively associated with an end of the shaft to support the shaft for rotation. The elastomer structure is clamped between the frame structure and the retainer, with the retainer being engaged with a portion of the frame structure to maintain clamping on the elastomer structure. The assembly is constructed and arranged to reduce transmission of noise from the sleeve bearing to the frame structure, and to control endplay of the armature structure by controlling compression of the elastomer structure due to clamping by the retainer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.