公开(公告)号：US10940845B2

公开(公告)日：2021-03-09

申请号：US16085255

申请日：2017-07-20

Applicant: Hefei University of Technology

Inventor： Xianxu Bai ,  Yang Li ,  Feilong Cai ,  Zhiyuan Si ,  Lijun Qian

IPC: B60T13/74 ,  F16D55/226 ,  F16D65/18 ,  H02K7/116 ,  B60T13/66 ,  F16D66/00 ,  F16D125/58 ,  F16D121/24 ,  F16D121/28 ,  F16D125/40 ,  F16D125/50 ,  F16D125/36 ,  F16D121/20

Abstract: The present invention discloses a motor-magnetostrictive actuator hybrid brake-by-wire system. The system includes a motor, a transmission mechanism, a magnetostrictive-driving piston mechanism and a floating-caliper disc mechanism. The transmission mechanism includes a planetary gear set and a screw set, and is driven by the motor. The linear motion of the sleeve is achieved by the planetary gear set and screw set. The sleeve pushes forward the piston head of the magnetostrictive-driving piston mechanism and the piston head pushes forward the brake pad back plate of the floating-caliper disc mechanism to clamp the brake disc, which accomplishes braking. The present invention uses the motor and the magnetostrictive-driving piston mechanism as a combined BBW system, which will simultaneously solve the problems of slow response, low precision and motor stalling effect of the only motor-driving braking systems and, also avoid the drawback of insufficient mechanical capabilities of the only magnetostrictive actuator-driving braking systems.

公开(公告)号：US11268586B2

公开(公告)日：2022-03-08

申请号：US16473511

申请日：2017-12-19

Applicant: HEFEI UNIVERSITY OF TECHNOLOGY

Inventor： Xianxu Bai ,  Yang Liu ,  Yang Li

IPC: F16D55/226 ,  F16D67/06 ,  F16D35/00 ,  F16D37/00 ,  F16D37/02 ,  F16D65/18 ,  F16D121/14 ,  F16D121/20 ,  F16D121/24 ,  F16D125/40 ,  F16D125/50

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.