CN-122009123-A - Electromechanical brake having motor contacts at corners of motor housing

Abstract

The invention relates to an electromechanical brake (10) for a motor vehicle. The electromechanical brake (10) comprises an electric motor (18) arranged in a motor housing (14) which drives the mechanical adjustment unit (26) in rotation, thereby enabling an axial movement of the brake adjuster (58) for applying a braking force. A motor contact (82) is arranged in the motor housing (14), by means of which motor contact the electric motor (18) is connected to a control unit (30) which controls the electric motor (18). The motor housing (14) is at least a triangular housing, wherein one motor contact (82) is arranged between the electric motor (18) and one of the corners (78) of the motor housing (14).

Inventors

• D. Kratzer

Assignees

• 罗伯特·博世有限公司

Dates

Publication Date

20260512

Application Date

20251110

Priority Date

20241112

Claims (8)

1. 1. Electromechanical brake (10) for a motor vehicle, comprising an electric motor (18) arranged in a motor housing (14) and driving a mechanical adjusting unit (26) in rotation, so that a brake adjuster (58) can be moved axially for applying a braking force, wherein a motor contact (82) is arranged in the motor housing (14), through which motor contact the electric motor (18) is connected to a control unit (30) controlling the electric motor (18), It is characterized in that the method comprises the steps of, The motor housing (14) is at least a triangular housing, wherein each of the motor contacts (82) is arranged between the electric motor (18) and one of the corners (78) of the motor housing (14).
2. 2. The electromechanical brake (10) of claim 1, wherein the motor housing (14) is a quadrilateral housing.
3. 3. Electromechanical brake (10) according to claim 1 or 2, characterized in that a parking brake device (66) is provided, wherein a contact portion (86) of the parking brake device (66) is arranged between the electric motor (18) and a corner (78) of the motor housing (14), through which contact portion the parking brake device is connected to the control unit (30).
4. 4. An electromechanical brake (10) according to claims 2 and 3, characterized in that the contact portion (86) of the parking brake device (66) is arranged in a corner (78) separate from the corner (78) with the motor contact portion (82).
5. 5. Electromechanical brake (10) according to one of the preceding claims, characterized in that a parking brake device (66) is provided, which is arranged in the motor housing (14) between an end face (62) of the electric motor (18) and the adjusting unit (26).
6. 6. An electromechanical brake (10) according to any of the claims 3-5, characterized in that the contact portion (86) of the parking brake device (66) is arranged in a corner (78) of the motor housing (14) adjacent to the parking brake device (66).
7. 7. Electromechanical brake (10) according to any of the preceding claims, characterized in that said adjustment unit (26) is a ball screw transmission.
8. 8. Motor vehicle comprising an electromechanical brake (10) according to any of the preceding claims.

Description

Electromechanical brake having motor contacts at corners of motor housing Technical Field The invention relates to an electromechanical brake for a motor vehicle. The invention also relates to a motor vehicle having such an electromechanical brake. Background Typically, service brakes apply brake to a vehicle by applying brake fluid to a brake piston and brake pads against a brake disc. With the increasing electrification of devices in motor vehicles, service brakes are also designed as electromechanical brakes, so that brake fluid and the associated complex valve and line structures can be dispensed with. Maintenance effort can also be significantly reduced by such an electromechanical brake. In DE 10 2013 005 744 B4, a service brake is described, which is a brake caliper with hydraulically driven brake cylinders, and a parking brake is also described, which is an electromechanically actuated translational-rotational transmission. The brake also has an electric motor arranged in the drive housing. A motor electrical contact is arranged in the drive housing, via which motor electrical contact the electric motor can be connected to the coupling plug. Document US 10,407,041 B2 relates to an electric parking brake actuator for actuating a parking brake in a motor vehicle. The parking brake actuator includes an electric motor by which a locking pawl of the parking brake actuator is driven. In the region of the electric motor, electrical contacts are provided, by means of which the parking brake actuator can be brought into electrical contact with the electric motor. Disclosure of Invention The object of the present invention is to provide an electromechanical brake that is smaller in size and lighter in weight. This object is achieved by an electromechanical brake for a motor vehicle according to claim 1. Preferred embodiments emerge from the dependent claims. The invention provides an electromechanical brake for a motor vehicle. The electromechanical brake includes an electric motor disposed in a motor housing that drives a mechanical adjustment unit in rotation so that a brake adjuster can be moved axially to apply a braking force. A motor contact is arranged in the motor housing, through which motor contact the electric motor is connected to a control unit controlling the electric motor. The motor housing is an at least triangular housing, wherein one motor contact each is arranged between the electric motor and one of the corners of the motor housing. The motor housing refers to a housing accommodating at least an electric motor. However, the motor housing is independent of the electric motor, so that the motor housing may house other components than the electric motor, independent of the electric motor. According to the invention, a single motor contact is arranged at each corner. Thereby, the space between the circular electric motor and the motor housing can be utilized. In contrast to the common arrangement of all motor contacts, the size of the motor housing can thereby be further reduced. Thus, the material used for the motor housing can be reduced, and the weight of the electromechanical brake can be reduced. Due to the reduction in weight of the motor housing, driving comfort of the electromechanical brake arranged at the unsprung wheel can be improved. Furthermore, the electromechanical brake can be manufactured more economically due to the reduced material usage. In a preferred embodiment of the invention, the motor housing is a quadrilateral housing. Compared to a triangular housing, a quadrangular housing has the advantage that it can be produced more easily. In a further preferred embodiment of the invention, a parking brake device is provided, wherein a contact of the parking brake device is arranged between the electric motor and a corner of the motor housing, via which contact the parking brake device is connected to the control unit. The contact of the parking brake device is thus arranged in a corner like the motor contact. Accordingly, the space between the electric motor and the corner of the motor housing is also used to position the contact of the parking brake device. Therefore, a separate space is not required for installing the contact portion of the parking brake device. Accordingly, the arrangement of the contact portion of the parking brake device can save space, so that the size of the motor housing can be reduced. Preferably, the contact portion of the parking brake device is arranged at a corner separated from the corner having the motor contact portion. Although the contact portion of the parking brake device may be disposed at the same corner as the motor contact portion, the contact portion of the parking brake device is disposed at a corner separate from the motor contact portion. In other words, the contact portion of the parking brake device is the only contact portion provided in the corner. This arrangement also allows the motor housing to be designed smaller. In addit