DE-102024210856-A1 - Electromechanical brake with motor contacts in the corners of the 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 rotates a mechanical adjusting unit (26) so that a brake actuator (58) is axially displaceable for applying a braking force. Motor contacts (82) are arranged in the motor housing (14), via which the electric motor (18) is connected to a control unit (30) that controls the electric motor (18). The motor housing (14) is designed as an at least triangular housing, with a single motor contact (82) being arranged between the electric motor (18) and one of the corners (78) of the motor housing (14).

Inventors

• Dietmar Kratzer

Assignees

• Robert Bosch Gesellschaft mit beschränkter Haftung

Dates

Publication Date

20260513

Application Date

20241112

Claims (8)

1. Electromechanical brake (10) for a motor vehicle, comprising an electric motor (18) arranged in a motor housing (14), which rotaryally drives a mechanical adjustment unit (26) so that a brake actuator (58) is axially displaceable for applying a braking force, wherein motor contacts (82) are arranged in the motor housing (14) via which the electric motor (18) is connected to a control unit (30) controlling the electric motor (18), characterized in that the motor housing (14) is designed as at least a triangular housing, wherein a single motor contact (82) is arranged between the electric motor (18) and one of the corners (78) of the motor housing (14).
2. Electromechanical brake (10) according to Claim 1 , characterized in that the motor housing (14) is designed as a square housing.
3. Electromechanical brake (10) according to Claim 1 or 2 , characterized in that a parking brake device (66) is provided, wherein a contact (86) of the parking brake device (66), via which it is connected to the control unit (30), is arranged between the electric motor (18) and a corner (78) of the motor housing (14).
4. Electromechanical brake (10) according to Claim 2 and 3 , characterized in that the contact (86) of the parking brake device (66) is arranged in a corner (78) separate from the corners (78) with motor contact (82).
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. Electromechanical brake (10) according to one of the Claims 3 until 5 , characterized in that a contact (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. Electromechanical brake (10) according to one of the preceding claims, characterized in that the adjusting unit (26) is a ball screw drive.
8. Motor vehicle comprising an electromechanical brake (10) according to one of the preceding claims.

Description

The present invention relates to an electromechanical brake for a motor vehicle. Furthermore, the invention relates to a motor vehicle which has such an electromechanical brake. State of the art The service brake is typically a brake system that uses brake fluid to press a brake piston and brake pad against a brake disc to slow the vehicle. With the increasing electrification of vehicle components, the service brake is also being developed as an electromechanical brake, eliminating the need for brake fluid and the associated complex valve and line system. Such an electromechanical brake could also significantly reduce maintenance requirements. In the DE 10 2013 005 744 B4 The system consists of a brake caliper with a hydraulically operated brake cylinder as the service brake and an electromechanically actuated rotary-translation gearbox as the parking brake. The brake also includes an electric motor housed in a drive unit. Electrical motor contacts are located in the drive unit, allowing the electric motor to be connected via a plug connector. The US 10,407,041 B2 This refers to an electric parking brake actuator for operating a parking brake in a motor vehicle. The parking brake actuator comprises an electric motor which drives a pawl of the parking brake actuator. Electrical contacts are arranged in the area of the electric motor, allowing electrical contact between the parking brake actuator and the electric motor. The object underlying the invention is to provide an electromechanical brake which is smaller and has a lower weight. The problem is solved by an electromechanical brake for a motor vehicle according to claim 1. Preferred embodiments are set forth in the dependent claims. Disclosure of the invention The invention provides an electromechanical brake for a motor vehicle. The electromechanical brake comprises an electric motor arranged in a motor housing, which rotates a mechanical adjustment unit so that a brake actuator is axially displaceable for applying a braking force. Motor contacts are arranged in the motor housing, via which the electric motor is connected to a control unit that controls the electric motor. The motor housing is designed as at least a triangular housing, with a single motor contact arranged between the electric motor and each of the corners of the motor housing. A motor housing is understood to be a housing that accommodates at least the electric motor. However, the motor housing is independent of the electric motor, allowing it to house additional components that are independent of the motor. According to the invention, a single motor contact is arranged in each corner. This allows the space between the round electric motor and the motor housing to be utilized. In contrast to a common arrangement of all motor contacts, this makes it possible to design the motor housing even smaller. This, in turn, reduces the material used for the motor housing and the weight of the electromechanical brake. The reduced weight of the motor housing improves the driving comfort of the electromechanical brake located on the unsprung wheel. Furthermore, the reduced material usage makes the electromechanical brake more economical to manufacture. In a preferred embodiment of the invention, the motor housing is designed as a rectangular housing. A rectangular housing has the advantage over a triangular housing that it is easier to manufacture. In a further preferred embodiment of the invention, a parking brake device is provided, wherein a contact of the parking brake device, via which it is connected to the control unit, is arranged between the electric motor and a corner of the motor housing. The contact of the parking brake device is thus arranged in a corner, just like the motor contacts. Accordingly, the space between the electric motor and the corner of the motor housing is utilized to accommodate the contact of the parking brake device. Therefore, no separate space needs to be provided for the contact of the parking brake device. Consequently, the contact of the parking brake device can also be arranged in a space-saving manner. This will be provided so that the motor housing can be smaller. Preferably, the contact of the parking brake device is arranged in a corner separate from the corners containing the motor contacts. Although the contact of the parking brake device can be located in the same corner as a motor contact, it is preferably arranged in a corner separate from the motor contacts. In other words, the contact of the parking brake device is the only contact in the corner. This arrangement also allows for a smaller motor housing. Additionally, sufficient space is provided for each contact in the corner to facilitate easy connection. In a particularly advantageous embodiment, a parking brake device is provided, which is arranged in the motor housing between an end face of the electric motor and the adjustment unit. The parking brake device is thus located below the electric motor