ELECTROMECHANICAL BRAKE COMPRISING PRIMARY-SHAPED OR RESHAPED MOTOR HOUSING

Abstract

An electromechanical brake for a motor vehicle. The electromechanical brake includes an electric motor, which rotationally drives a mechanical adjustment unit arranged in a brake caliper housing, so that, for applying a braking force, a brake actuator is displaceable in an axial direction of the brake caliper housing. A motor housing arranged radially on the brake caliper housing accommodates the electric motor, and a control device housing of a control device controlling the electric motor is arranged on the motor housing. The motor housing is formed from the brake caliper housing and the control device housing, and the brake caliper housing is manufactured by a primary-shaping or reshaping step. A motor housing edge formed by the brake caliper housing, between the brake caliper housing and the control device housing, is formed in such a way that a radial height of the motor housing edge increases in the axial direction.

Claims

1. An electromechanical brake for a motor vehicle, comprising: an electric motor, which rotationally drives a mechanical adjustment unit arranged in a brake caliper housing, so that, for applying a braking force, a brake actuator is displaceable in an axial direction of the brake caliper housing, wherein a motor housing arranged radially on the brake caliper housing accommodates the electric motor, and a control device housing of a control device controlling the electric motor is arranged on the motor housing; wherein the motor housing is formed from the brake caliper housing and the control device housing, and the brake caliper housing is manufactured by a primary-shaping or reshaping step, wherein a motor housing edge formed by the brake caliper housing, between the brake caliper housing and the control device housing, is formed in such a way that a radial height of the motor housing edge increases in the axial direction, starting from at least one axial edge side.

2. The electromechanical brake according to claim 1, wherein the height of the motor housing edge increases from both axial edge sides in a radial direction.

3. The electromechanical brake according to claim 1, wherein the brake caliper housing manufactured by the primary-shaping or reshaping step is machined in a region of the motor housing.

4. The electromechanical brake according to claim 1, wherein the brake caliper housing is formed as a forged part.

5. The electromechanical brake according to claim 1, wherein the brake caliper housing is a die-cast part.

6. The electromechanical brake according to claim 1, wherein the brake caliper housing is formed as an extruded part.

7. The electromechanical brake according to claim 1, wherein the control device housing is formed from a plastics material.

8. The electromechanical brake according to claim 1, wherein a seal between the control device housing and the brake caliper housing is formed by the control device housing.

9. A motor vehicle, comprising: an electromechanical brake, including: an electric motor, which rotationally drives a mechanical adjustment unit arranged in a brake caliper housing, so that, for applying a braking force, a brake actuator is displaceable in an axial direction of the brake caliper housing, wherein a motor housing arranged radially on the brake caliper housing accommodates the electric motor, and a control device housing of a control device controlling the electric motor is arranged on the motor housing, wherein the motor housing is formed from the brake caliper housing and the control device housing, and the brake caliper housing is manufactured by a primary-shaping or reshaping step, wherein a motor housing edge formed by the brake caliper housing, between the brake caliper housing and the control device housing, is formed in such a way that a radial height of the motor housing edge increases in the axial direction, starting from at least one axial edge side.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a sectional view of an electromechanical brake according to an exemplary embodiment of the present invention.

[0025] FIG. 2 is a side view of the brake caliper housing, according to an example embodiment of the present invention.

[0026] FIG. 3 is a perspective view of the brake caliper housing according to FIG. 2.

[0027] FIG. 4 is a view of the brake caliper housing according to FIG. 3 after post-processing by machining.

[0028] FIG. 5 is a perspective view of the brake caliper housing according to a further exemplary embodiment of the present invention.

[0029] FIG. 6 is a side view of the brake caliper housing according to a further exemplary embodiment of the present invention.

[0030] FIG. 7 is a perspective view of the brake caliper housing according to FIG. 6.

[0031] FIG. 8 is a perspective view of the brake caliper housing according to FIG. 7 after post-processing by machining.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS

[0032] FIG. 1 is a sectional view of an electromechanical brake 10 according to an exemplary embodiment of the present invention. The electromechanical brake 10 comprises a brake caliper housing 14, in which an adjustment unit 18 is arranged. In the exemplary embodiment shown, the brake caliper housing 14 is designed in two parts, with both parts being firmly connected to one another. However, in an exemplary embodiment not shown, the brake caliper housing 14 can also be formed in one part. In the exemplary embodiment shown, the adjustment unit 18 is designed as a spindle drive unit, at the end of which a brake actuator 22 is arranged. This brake actuator 22 is displaceable in an axial direction 26 of the brake caliper housing. The adjustment unit 18 is driven by an electric motor 30, which is provided radially to the brake caliper housing 14.

[0033] The electric motor 30 is arranged in a motor housing 34, which is also provided radially to the adjustment unit 18. A control device 38, via which the electric motor 30 can be controlled, is positioned downstream of the motor housing 34. The control device 38 is arranged in a control device housing 42 formed from plastics. According to the present invention, the motor housing 34 is formed from part of the brake caliper housing 14 and part of the control device housing 42. Brake caliper housing 14 and control device housing 42 both form part of a motor housing edge 46. A seal 50 is positioned between the motor housing edge 46 formed by the brake caliper housing 14 and the motor housing edge 46 formed by the control device housing 42, which seal is provided in the motor housing edge 46 formed by the control device housing 42. This protects the electric motor 30 against external influences such as dirt or moisture.

[0034] FIG. 2 is a side view of the brake caliper housing 14. The brake caliper housing 14 shown in this figure corresponds to the exemplary embodiment shown in FIG. 1. A height h of the motor housing edge 46 formed by the brake caliper housing 14 increases from a first axial edge side 54 to a second axial edge side 58 of the motor housing 34. A perspective view of the brake caliper housing 14 of FIG. 2 is shown in FIG. 3. It can be seen that, on the first axial edge side 54, the motor housing edge 46 has the same height h as a motor housing bottom 62 formed by the brake caliper housing 14. This makes it possible for a primary-shaping or reshaping tool to manufacture the entire brake caliper housing 14, including the part of the motor housing 34 formed by the brake caliper housing 14, in the axial direction 26. As a result, for forming the motor housing 34, no cross slide is necessary to form a radial structure.

[0035] FIG. 4 is a view of the brake caliper housing 14 according to FIG. 3 after post-processing by machining. During the post-processing by machining, a thickness of the motor housing bottom 62 formed by the brake caliper housing 14 was reduced. As a result, a height h for the motor housing edge 46 is also formed on the first axial edge side 54. Post-processing improves manufacturing tolerances. In addition, the weight of the brake caliper housing 14 can be reduced.

[0036] A further exemplary embodiment of the present invention is shown in FIG. 5. In contrast to the exemplary embodiment according to FIG. 1-4, in this exemplary embodiment, a height h of the motor housing edge 46 formed by the brake caliper housing 14 increases from the second axial edge side 58 to the first axial edge side 54 of the motor housing 34. Otherwise, this exemplary embodiment corresponds to the above-described exemplary embodiment.

[0037] A side view of the brake caliper housing 14 according to a further exemplary embodiment of the present invention is shown in FIG. 6. In this exemplary embodiment, a height h of the motor housing edge 46 formed by the brake caliper housing 14 increases both from the first axial edge side 54 and from the second axial edge side 58 of the motor housing 34. This makes it possible for an interior of the part of the motor housing 34 formed by the brake caliper housing 14 to be formed by primary-shaping or reshaping tools from both axial edge sides 54, 58.

[0038] A perspective view of the brake caliper housing 14 shown in FIG. 6 is shown in FIG. 7. This figure shows that the motor housing edge 46 is chamfered from both axial edge sides 54, 58. The two chamfers meet at the maximum height h of the motor housing edge 46. In this exemplary embodiment, post-processing by machining can also take place, as shown in FIG. 8. In contrast to the post-processing by machining of FIG. 4, in this brake caliper housing 14, an inner side of the motor housing edge 46 has also been machined. This increases an interior space of the motor housing 34 and also reduces the weight of the brake caliper housing 14.