Electromagnetic wheel brake device
US6536561B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Sep 21, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2025/2087
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electromechanical wheel brake device for a motor vehicle, having an electric motor for driving two planetary gears, connected in series with one another, which actuate the wheel brake device via a threaded roller gear. The planetary gear is provided with a first electromagnetic coupling, with which a sun wheel of the second planetary gear can be locked, or can be connected in a manner fixed against relative rotation to a sun wheel of the first planetary gear, and with a second electromagnetic coupling, with which a ring gear of the second planetary gear can be stopped or can be connected in a manner fixed against relative rotation to a ring gear of the first planetary gear. By means of the electric motor, by switching of the two couplings, the rolling thread drive can be driven fast to overcome an air gap, slowly and with major speed reduction for the ensuing exertion of a high braking force, and fast for releasing without a reversal of the direction of rotation of the electric motor. For use as a parking brake, both couplings are switched to be without current, as a result of which the second planetary gear is blocked and an imposed braking force is maintained while the electri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.