CN-122029088-A - Electromechanical brake device for a motor vehicle

Abstract

The invention relates to an electromechanical brake device (1) for a motor vehicle, comprising at least one electric brake actuator (4) having a brake part (32), wherein the brake part (32) can be adjusted and can be brought into braking engagement with a matching brake part (2), wherein the brake actuator (4) can be controlled by an electrical control unit (100). In order to allow improved operational reliability during continuous operation, according to the invention the control unit (100) is designed to be combined with the brake actuator (4), and the heat dissipating unit (45) is thermally coupled to the control unit (100) and connected in a thermally conductive manner to the exposed outer surface (46) of the brake actuator (4) or has the exposed outer surface (46) of the brake actuator (4).

Inventors

• Levant Cherenki
• Dennis Kovax

Assignees

• 蒂森克虏伯普利斯坦股份公司
• 蒂森克虏伯股份公司

Dates

Publication Date

20260512

Application Date

20241011

Priority Date

20231017

Claims (13)

1. 1. An electromechanical brake device (1) for a motor vehicle, the electromechanical brake device (1) comprising at least one electric brake actuator (4), the electric brake actuator (4) having an actuating device (5) and a brake part (32), the brake part (32) being connected to the actuating device (5), movable along an axis (A) by the actuating device (5) and capable of braking engagement with a counter brake part (2), wherein the actuating device (5) has a first actuating drive (6) and a second actuating drive (7) coupled in series to the first actuating drive (6), Wherein the first actuating drive (6) has a rotatably drivable first drive wheel (65) and the second actuating drive (7) has a rotatably drivable second drive wheel (75), the second drive wheel (75) being coaxial with the first drive wheel, Wherein a clutch device (8, 9) is arranged between the first drive wheel (65) and the second drive wheel (75), Wherein the clutch device is in the form of a friction clutch (8, 9) having a friction element (8), which friction element (8) can be frictionally connected to a counter friction element (9) during clutch engagement, Wherein the brake actuator (4) is controllable by an electrical control unit (100), It is characterized in that the method comprises the steps of, The control unit (100) is formed in a manner to be combined with the brake actuator (4), and a heat dissipating element (45) is thermally coupled to the control unit (100), which is connected to the exposed outer surface (46) of the brake actuator (4) or has the exposed outer surface (46) of the brake actuator (4) in a thermally conductive manner.
2. 2. Braking device according to claim 1, characterized in that the heat-dissipating element (45) is connected in a thermally conductive manner to at least one electronic component (108) of the control unit (100).
3. 3. Brake device according to any of the preceding claims, characterized in that the control unit (100) has a control circuit board (102).
4. 4. A braking device according to claim 3, characterized in that the heat-dissipating element (45) is connected to the control circuit board (102) in a thermally conductive manner.
5. 5. Brake device according to any one of the preceding claims, characterized in that the heat-dissipating element (45) has at least one cooling surface (48), which cooling surface (48) is in thermally conductive contact with the control unit (100).
6. 6. Brake device according to any of the preceding claims, characterized in that the control unit (100) is arranged in a control housing (101) attached to a brake housing (45).
7. 7. Brake device according to claim 6, characterized in that the heat-dissipating element (45) is connected to the control housing (101) and/or the brake housing (45) in a thermally conductive manner.
8. 8. Brake device according to claim 7, characterized in that the control housing (101) and/or the brake housing (45) has a heat-dissipating element (45).
9. 9. Brake device according to claim 8, characterized in that the control housing (101) and/or the brake housing (45) has a cooling surface (48).
10. 10. Brake device according to any of the preceding claims, characterized in that the heat-dissipating element (45) comprises metal.
11. 11. Braking device according to any one of the preceding claims, characterized in that the heat-dissipating element (45) has transmission means.
12. 12. Brake device according to any of the preceding claims, characterized in that the control unit (100) has an electrical connector device (103), the electrical connector device (103) having at least one plug terminal (104).
13. 13. Braking device according to any of the preceding claims, characterized in that the heat dissipating element (45) is designed to dissipate heat into a region remote from the friction clutch (8, 9).

Description

Electromechanical brake device for a motor vehicle Background The invention relates to an electromechanical brake arrangement for a motor vehicle, comprising at least one electric brake actuator having an actuating device and a brake part, which brake part is connected to the actuating device, is movable along an axis by the actuating device and is capable of braking engagement with a counter brake part, wherein the actuating device has a first actuating drive and a second actuating drive coupled in series to the first actuating drive, wherein the first actuating drive has a first driving wheel which is capable of being driven in a rotatable manner, and the second actuating drive has a second driving wheel which is capable of being driven in a rotatable manner, the second driving wheel being coaxial with the first driving wheel, wherein a clutch device is arranged between the first driving wheel and the second driving wheel, wherein the clutch device is in the form of a friction clutch having a friction element which is capable of being frictionally connected to the counter friction element during clutch engagement, wherein the brake actuator is capable of being controlled by an electric control unit. Such a braking device of a motor vehicle is in the form of a friction brake, wherein a braking component which is supported on the chassis and which is stationary with respect to the rotation of the wheel to be braked can be brought into braking engagement with a counter braking component which rotates with the wheel by means of an actuating device. During braking engagement, a frictional contact is produced between the braking member and the counter braking member, which is referred to as braking contact, wherein the greater the braking torque produced by the friction, the greater the movement force exerted by the actuating device in the direction of movement. Disc brakes are known in principle and in which the counter brake element is formed by a brake disc, which rotates with the wheel and is axially surrounded on both sides by a brake caliper, are of common design. By means of at least one preferably linear actuation drive axially supported on the brake caliper, the brake component, typically a brake pad, can be moved in the axial movement direction and thus brought into frictional contact with the axial side of the brake disc, wherein the brake disc is frictionally clamped between the moving brake component and another brake component axially supported on the opposite side of the brake caliper during braking engagement. Each actuation driver has at least one electric motor which can be controlled by an electrical control unit in order to produce a braking engagement. It is known practice according to the prior art, for example from DE 195 37 A1, to use a central control unit of a motor vehicle to control the motors of all braking devices assigned to the individual wheels to be braked. This makes it possible in principle to perform a manual and an automatic braking operation, wherein manual inputs and parameters can be taken into account according to a predetermined braking algorithm, which manual inputs and parameters depend on the current operating and driving situation. In order to generate a predetermined braking force in this way, the windings of all the motors of the actuation driver are energized by the central control unit via an electrical supply line extending from the braking device to the control unit. However, the relatively long wire length required may increase susceptibility to failure. Nevertheless, in order to be able to ensure a high degree of reliability which is absolutely necessary for the operation of the brake, for example, as mentioned in the cited prior art, a relatively large amount of additional complexity is still required, due to redundant designs, control and monitoring devices, etc. For reliable operation of the brake, it is important that the waste heat generated in the electronic components during control of one or more brake actuators in the control unit is dissipated into the environment in order to reliably avoid any failure caused by overheating, especially in severe continuous use with frequent and intensive braking operations. In view of the above, the present invention solves the problem of allowing improvement of functional reliability in continuous operation in the case of an electric brake device. Disclosure of Invention According to the invention, this problem is solved by a braking device according to claim 1. Advantageous developments will become apparent from the dependent claims. In an electromechanical brake arrangement for a motor vehicle, comprising at least one electric brake actuator having an actuating device and a brake part, which brake part is connected to the actuating device, is movable along an axis by the actuating device and is capable of braking engagement with a counter brake part, wherein the actuating device has a first actuating drive and