Electric motor with brake
US6459182B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Jun 30, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/1025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an electric motor (1) with a rotor (2) and a housing (3) that has at one end a brake-mounting end shield (4) to support a shaft (5) of the rotor (2) that passes through the brake-mounting end shield (4). The electric motor (1) further comprises an electromagnetically actuated brake (10), which comprises a magnet body (17) with a brake coil (11). An armature plate (13), which can be pulled by the magnet body (17) against a braking pressure force exerted by springs (12), is substantially nonrotatably mounted in a guide mechanism (15) but can be axially displaced in the direction of the shaft (5). A brake rotor (20), against which the armature plate (13) is apposed with the braking pressure when no current is flowing through the brake coil (11), is fixed to the shaft (5), preferably by way of a drive element (28). In accordance with the invention the brake (10) is prefabricated so as to be complete except for the drive element (28) and to be independent of the bearing of the motor shaft, and can be screwed to the housing (3). The effort of installing and removing the brake can thus be considerably reduced in comparison to previously known electric motors with …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.