EP-4737236-A1 - ELECTROMECHANICAL BRAKE DEVICE HAVING BRAKE MOTOR AND CONTROLLER SEPARATED FROM EACH OTHER, AND VEHICLE

EP4737236A1EP 4737236 A1EP4737236 A1EP 4737236A1EP-4737236-A1

Abstract

This application provides an electro-mechanical brake apparatus with a brake motor and a controller separated, and a vehicle. The electro-mechanical brake apparatus includes a brake motor, a gearbox, and a controller, the controller is configured to drive the brake motor to rotate, and the brake motor is configured to drive, by using the gearbox, a brake to brake a vehicle. The gearbox and the controller are accommodated in a same housing, and the housing is fastened to the brake motor. The housing includes a spacer, in a direction of a motor shaft of the brake motor, the brake motor, the gearbox, the spacer, and the controller are sequentially arranged, and the controller passes through the spacer and the gearbox and is electrically connected to the brake motor. In this application, the brake motor and the controller of the electro-mechanical brake apparatus are on two sides of the gearbox, effectively utilizing space and reducing a size of the electro-mechanical brake apparatus.

Inventors

MAO, Yan
ZHU, Lingfeng
WU, Xiaopeng
SUN, YI

Assignees

Huawei Digital Power Technologies Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240517

Claims (15)

An electro-mechanical brake apparatus with a brake motor and a controller separated, wherein the electro-mechanical brake apparatus comprises a brake motor, a gearbox, and a controller, the controller is configured to drive the brake motor to rotate, and the brake motor is configured to drive, by using the gearbox, a brake to brake a vehicle; the gearbox and the controller are accommodated in a same housing, and the housing is fastened to the brake motor; and the housing comprises a spacer, in a direction of a motor shaft of the brake motor, the brake motor, the gearbox, the spacer, and the controller are sequentially arranged, and the controller passes through the spacer and the gearbox and is electrically connected to the brake motor.
The electro-mechanical brake apparatus according to claim 1, wherein the controller comprises a circuit board and a transmission member; the circuit board and the spacer are arranged in parallel in the direction of the motor shaft of the brake motor; and in the direction of the motor shaft of the brake motor, the transmission member passes through the spacer and the gearbox and is electrically connected between the brake motor and the circuit board.
The electro-mechanical brake apparatus according to claim 2, wherein the housing comprises a detachable cover, and the circuit board and the cover are arranged in parallel in the direction of the motor shaft of the brake motor.
The electro-mechanical brake apparatus according to claim 3, wherein the circuit board is fastened to the cover and is fastened in the housing with the cover.
The electro-mechanical brake apparatus according to claim 4, wherein the spacer is fastened to the cover, and the spacer and the circuit board are fastened in the housing with the cover.
The electro-mechanical brake apparatus according to claim 5, wherein a material of the spacer is resin, the spacer is formed on the cover through injection molding, and the spacer is in at least partial contact with the circuit board to fasten the circuit board.
The electro-mechanical brake apparatus according to claim 2, wherein the transmission member comprises a conductive copper bar, and the controller transmits a power signal to the brake motor by using the conductive copper bar; and the conductive copper bar extends in a direction parallel to the direction of the motor shaft of the brake motor, and an outer surface of the conductive copper bar is coated with an insulation layer.
The electro-mechanical brake apparatus according to claim 2, wherein the transmission member comprises a transmission line, and the controller transmits a control signal to the brake motor through the transmission line; and a line groove is provided in the housing in the direction of the motor shaft of the brake motor, and the transmission line is embedded in the line groove to pass through the spacer and the gearbox.
The electro-mechanical brake apparatus according to any one of claims 2 to 8, wherein the gearbox comprises an input shaft, the input shaft is in coaxial transmission with the motor shaft, the electro-mechanical brake apparatus comprises a position sensor configured to monitor a rotation angle of the brake motor, and the position sensor comprises a stator and a rotor; the input shaft comprises an extension section extending toward the circuit board and passing through the spacer, and the rotor is coaxially fastened to the extension section; and the stator is fastened to the circuit board, and a central axis of the stator coincides with a rotation axis of the input shaft.
The electro-mechanical brake apparatus according to claim 9, wherein the stator of the position sensor is fastened to a surface that is of the circuit board and that is close to the gearbox; and the position sensor is a magnetoresistive sensor, and in an axial direction of the input shaft, the rotor and the stator of the position sensor are spaced apart; or the position sensor is an electric eddy current sensor or a photoelectric sensor, the stator of the position sensor is coaxially sleeved on a periphery of the rotor, and in a radial direction of the input shaft, an outer circumferential surface of the rotor and an inner circumferential surface of the stator are spaced apart.
The electro-mechanical brake apparatus according to claim 10, wherein the spacer is provided with a through hole that allows the motor shaft to pass through, the housing of the gearbox comprises an oil sealing member, and an outer circumferential surface of the oil sealing member is attached to an inner circumferential surface of the through hole to seal the through hole; and the position sensor is a magnetoresistive sensor, and the oil sealing member is sleeved on the periphery of the rotor; or the position sensor is an electric eddy current sensor or a photoelectric sensor, and the oil sealing member is sleeved on a periphery of the motor shaft.
The electro-mechanical brake apparatus according to claim 9, wherein in an axial direction of the motor shaft, a thickness of the stator is greater than a thickness of the circuit board, and the stator is embedded in a positioning hole of the circuit board.
The electro-mechanical brake apparatus according to any one of claims 2 to 8, wherein the electro-mechanical brake apparatus comprises a locking mechanism, the locking mechanism is in a transmission connection to the gearbox, and the controller is further configured to: drive a locking motor of the locking mechanism to rotate to lock or release a gear shaft of the gearbox and control the gearbox for transmission.
The electro-mechanical brake apparatus according to claim 13, wherein in an axial direction of the motor shaft, the locking motor of the locking mechanism and the circuit board are located on a same side of the spacer, and the locking mechanism passes through the spacer and is in a transmission connection to the gear shaft of the gearbox.
A vehicle, comprising a wheel and the electro-mechanical brake apparatus according to any one of claims 1 to 14, wherein the electro-mechanical brake apparatus is configured to brake the wheel.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202321844839.4, filed with the China National Intellectual Property Administration on July 13, 2023, entitled "ELECTRO-MECHANICAL BRAKE APPARATUS WITH BRAKE MOTOR AND CONTROLLER SEPARATED, AND VEHICLE", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of vehicle technologies, and specifically, to an electro-mechanical brake apparatus with a brake motor and a controller separated, and a vehicle. BACKGROUND An electro-mechanical brake (electro-mechanical brake, EMB) apparatus uses a motor and a mechanical transmission mechanism to drive a brake to implement braking. The electro-mechanical brake apparatus features a simple structure, high responsiveness, a stable load transfer, no need to dispose a hydraulic pipe, and the like, and has high transmission efficiency. The electro-mechanical brake apparatus can improve safety, maneuverability, and comfort of a vehicle. A motor, a mechanical transmission mechanism, and a brake in an existing electro-mechanical brake apparatus are independent components, and an integration level is low. As a result, the electro-mechanical brake apparatus is too large in size to be arranged in the vehicle. A controller of the motor is usually fastened to the top of the motor, increasing an overall height of the electro-mechanical brake apparatus. SUMMARY This application provides an electro-mechanical brake apparatus with a brake motor and a controller separated, and a vehicle. The electro-mechanical brake apparatus is small in size. This application specifically includes the following solutions. According to a first aspect, this application provides an electro-mechanical brake apparatus with a brake motor and a controller separated. The electro-mechanical brake apparatus includes a brake motor, a gearbox, and a controller, the controller is configured to drive the brake motor to rotate, and the brake motor is configured to drive, by using the gearbox, a brake to brake a vehicle; the gearbox and the controller are accommodated in a same housing, and the housing is fastened to the brake motor; andthe housing includes a spacer, in a direction of a motor shaft of the brake motor, the brake motor, the gearbox, the spacer, and the controller are sequentially arranged, and the controller passes through the spacer and the gearbox and is electrically connected to the brake motor. In this application, the electro-mechanical brake apparatus drives, by using the brake motor, the gearbox to rotate, to drive the brake to brake the vehicle. The brake motor is controlled by the controller, the controller and the brake motor are on two opposite sides of the gearbox, and the controller passes through the gearbox and is electrically connected to the brake motor. A main structure of the controller is usually plate-shaped. The controller is arranged in a direction perpendicular to the direction of the motor shaft of the brake motor, so that space occupied by the controller in the electro-mechanical brake apparatus can be reduced, and an overall size of the electro-mechanical brake apparatus can be reduced. In this application, the electro-mechanical brake apparatus further provides sealing protection on the controller by using the spacer, to avoid direct contact between a lubricant in the gearbox and the controller. This can ensure that the controller reliably controls the brake motor. In an implementation, the controller includes a circuit board and a transmission member; the circuit board and the spacer are arranged in parallel in the direction of the motor shaft of the brake motor; andin the direction of the motor shaft of the brake motor, the transmission member passes through the spacer and the gearbox and is electrically connected between the brake motor and the circuit board. In this implementation, the circuit board of the controller and the spacer are arranged in parallel, so that space occupied by the circuit board in the housing can be reduced. In addition, the transmission member passes through the spacer and the gearbox, so that the circuit board can be electrically connected to the brake motor. In an implementation, the housing includes a detachable cover, and the circuit board and the cover are arranged in parallel in the direction of the motor shaft of the brake motor. In an implementation, the circuit board is fastened to the cover and is fastened in the housing with the cover. In an implementation, the spacer is fastened to the cover, and the spacer and the circuit board are fastened in the housing with the cover. In the foregoing implementation, the cover of the housing is disposed on a side close to the circuit board, to facilitate installation and maintenance of the circuit board. Moreover, the cover is disposed in parallel with the circuit board and the spacer, to compress a size of the housing. In addition, the c