Brake using magnetorheological transmission and brake-by-wire
US11268586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2017 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Jan 30, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2125/50
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a brake-by-wire actuator based on motor-magnetorheological fluid clutch. The system includes a motor, a transmission mechanism and a floating-caliper disc mechanism. The transmission mechanism includes a magnetorheological fluid clutch, a planetary gear set and a ball screw set. The ball screw set includes balls, a ball screw and a sleeve. The floating-caliper disc mechanism includes a brake pad back plate, left and right brake pads, a caliper body, a brake disc and a guide rail. The motor and the magnetorheological fluid clutch cascaded in series, the linear motion of the sleeve of the ball screw set is achieved by the magnetorheological fluid clutch and the transmission mechanism. The sleeve pushes forward the brake pad back plate of the floating-caliper disc mechanism to clamp the brake disc by left and right brake pads, which accomplishes braking. The present invention uses a brake-by-wire actuator based on motor-magnetorheological fluid clutch, which not only has the advantages of fast response and improved braking security, but also solves the problem of the motor stalling during long time braking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.