Multi-disc brake for arrangement near the wheel on a motor vehicle, and motor vehicle

Abstract

The invention relates to a multi-disc brake (1) for arrangement near the wheel on a motor vehicle with an independent wheel suspension, the multi-disc brake comprising: - a housing (2) surrounding an interior (15), a longitudinal axis (L) of the housing (2) corresponding to a rotational axis of a shaft (6) extending through the housing, - a plurality of lamellae arranged in the interior (15) perpendicularly to the longitudinal axis L, comprising a plurality of first lamellae (16), which are connected to the shaft (6) for conjoint rotation therewith and are spaced apart from one another by intermediate spaces (18), and a plurality of second lamellae (17), which are arranged in the intermediate spaces (18) and are connected to the housing (2) for conjoint rotation therewith, wherein the first and second lamellae (16, 17) can be brought into contact with one another during a braking operation by an axial relative movement, wherein the housing (2) is designed as a cylindrical wheel carrier having a first end face (4), a second end face (5), and a side surface (3), and has a mounting (7) for a wheel bearing of the motor vehicle on the first end face (4), and has wheel-side attachment points (8) for at least one control arm on the second end face (5) and / or the side surface (3).

Description

[0001] Description

[0002] Multi-disk brake for wheel-mounted installation on a motor vehicle and motor vehicle

[0003] The present invention relates to a multi-disk brake for close-to-wheel mounting on a motor vehicle with independent wheel suspension. It further relates to a motor vehicle with a braking system comprising such a multi-disk brake.

[0004] Braking systems for motor vehicles, especially passenger cars, mostly comprising disc brakes, sometimes also drum brakes. In a disc brake, the braking force is provided by a brake disc mounted on the wheel hub and the brake pad located in the brake caliper. During braking, the vehicle's kinetic energy is converted into heat through friction.

[0005] This creates abrasion that is emitted as brake dust. Increasingly stringent requirements for vehicle particulate emissions make it desirable to reduce particulate emissions from brake dust.

[0006] It is an object of the present invention to provide a brake for a motor vehicle and a motor vehicle with a braking system in which particulate emissions are reduced. However, it should be taken into account that the installation space available for a close-to-wheel arrangement is very limited, although a close-to-wheel arrangement is desirable, for example, due to the advantageous component rigidity and strength, as well as good controllability.

[0007] This problem is solved by the subject matter of the independent claim. Embodiments and advantageous developments are the subject matter of the dependent claims.

[0008] According to one aspect of the invention, a multi-disk brake is specified for installation close to the wheels of a motor vehicle with independent wheel suspension. The multi-disk brake has a housing that surrounds an interior space, wherein a longitudinal axis of the housing corresponds to a rotational axis of a shaft extending through the housing. Furthermore, the multi-disk brake has a plurality of discs arranged in the interior space perpendicular to the longitudinal axis, comprising a plurality of first discs that are connected to the shaft in a rotationally fixed manner and spaced apart from one another by intermediate spaces, and a plurality of second discs that are arranged in the intermediate spaces and connected to the housing in a rotationally fixed manner. The first and second discs can be brought into contact with one another for a braking operation by an axial relative movement.

[0009] The housing of the multi-disk brake is designed as a cylindrical wheel carrier with a first end face, a second end face, and a peripheral surface. On the first end face, the housing has a receptacle for a wheel bearing of the motor vehicle. On the second end face and / or the peripheral surface, the housing has wheel-side pivot points for at least one link.

[0010] The multi-disk brake has the advantage of significantly reducing particulate emissions because the discs, where brake dust is generated during operation, are enclosed by the housing. Typically, this type of multi-disk brake is liquid-cooled and therefore has a fluid-tight housing. Brake dust cannot escape to the outside and is, if necessary, dissipated by the coolant.

[0011] Accordingly, the braking system also has a favorable drag coefficient, while a targeted air supply in disc and drum brakes typically increases the drag coefficient and thus negatively affects the efficiency of the vehicle.

[0012] The fluid-tight housing also ensures that the multi-disk brake can be operated with low maintenance and without corrosion.

[0013] The multi-disk brake also has the advantage of being so compact that it can be accommodated in the particularly limited space available when mounted close to the wheel. This is achieved in particular by the multi-disk brake housing itself being designed as a cylindrical wheel carrier. The housing thus replaces a vehicle's steering knuckle, thus reducing the number of components.

[0014] According to one embodiment, the wheel-side pivot points comprise mounting areas for a MacPherson strut and / or a steering arm carrier and / or wishbone of the vehicle. According to this embodiment, the housing of the multi-disk brake is suitable for use with a wheel suspension comprising a MacPherson strut. Such wheel guides with a strut axle are particularly widespread in passenger cars.

[0015] A MacPherson strut has a torsion-sliding joint formed by a piston and piston rod with a damper cylinder that is firmly connected to the wheel carrier of the wheel suspension, so that the shock absorber is part of the wheel guidance.

[0016] In this embodiment, the mounting area for a wishbone can be designed as a blind hole with an internal thread. In the area of ​​the blind hole, the housing can have a greater wall thickness locally to provide sufficient depth for the blind hole. The mounting area designed as a blind hole can be arranged, in particular, on the outer surface of the housing.

[0017] A mounting area for a MacPherson strut can, in particular, be designed as a screw clamp. In this embodiment, the lower end of the strut is accommodated in the screw clamp, which is connected to the housing. The screw clamp can, in particular, be firmly connected to the housing or formed integrally with the housing. If the housing is designed as a cast part, the screw clamp is formed integrally with the housing during this process. This provides a particularly resilient and space-saving design of the housing for the multi-disk brake.

[0018] According to one embodiment, the mounting area, designed as a screw clamp, is arranged on the second end face of the housing. The second end face of the housing provides a sufficiently large surface area for the arrangement of the mounting area.

[0019] A mounting area for a steering lever support can be designed, in particular, as a collar eyelet. The collar eyelet can be threaded or threadless.

[0020] The mounting area, designed as a cantilever eye, can be arranged on the second end face of the housing. The cantilever eye can, in particular, be formed integrally with the housing, for example, by being molded together with the housing in a casting process. This provides a particularly resilient pivot point for the steering lever support.

[0021] The design of the cantilever eye allows for the adjustment of a steering lever angle. This angle is designed according to the vehicle's steering geometry / kinematics.

[0022] According to one embodiment, the housing further comprises at least one inlet and one outlet for a coolant. Oil serves as the coolant or lubricant, which is supplied to the fluid-tight interior through the inlet and discharged again through the outlet.

[0023] According to one aspect of the invention, a motor vehicle is provided with a braking system comprising the described multi-disk brake. The longitudinal axis of the housing or the axis of rotation of the shaft extending through the housing corresponds to the axis of rotation of a wheel of the vehicle.

[0024] The vehicle has the advantage that the braking system has particularly low particulate emissions and is also integrated into the wheel suspension in a particularly space-saving manner, since the housing of the multi-disk brake can replace the steering knuckle of a wheel suspension.

[0025] Embodiments of the invention are described below by way of example with reference to schematic drawings.

[0026] Figure 1 shows a side view of a multi-disk brake according to an embodiment of the invention,

[0027] Figure 2 shows a sectional view of the multi-disk brake according to Figure 1 ,

[0028] Figure 3 shows a side view of the multi-disk brake according to Figure 1 with the spring strut mounted on the housing of the multi-disk brake,

[0029] Figure 4 shows the multi-disk brake according to Figure 3 in a sectional view and Figure 5 shows another side view of the multi-disk brake according to Figures 3 and 4.

[0030] Figure 1 shows a multi-disk brake 1 according to one embodiment of the invention. The multi-disk brake 1 has a housing 2, which can be manufactured, for example, as a cast metal part. The housing 2 has a substantially cylindrical shape with a circumferential surface 3, a first end face 4, and an opposite second end face 5. The elements of the multi-disk brake 1 are arranged in the interior of the housing 2, which is not shown in Figure 1 and is explained in more detail with reference to the following figures.

[0031] The housing 2 is also designed as a wheel carrier. For this purpose, it has a mount 7 for a wheel bearing on the first end face 4. Several wheel-side pivot points 8 are provided on the second end face 5. One pivot point 8 is designed as a mounting area 9 for a MacPherson strut. This mounting area 9 is designed as a screw clamp.

[0032] Another pivot point 8 provides a mounting area 10 for a wishbone. This mounting area 10 is designed as a blind hole with an internal thread. A wishbone (not shown) with a through hole can be placed against the mounting area 10 and connected to it with a screw.

[0033] Furthermore, the housing 2 has a pivot point 8, which is designed as a mounting area 11 for a steering lever support and which has the shape of a collar eyelet that protrudes from the plane of the second end face 5. A steering lever support (not shown) can be fixed to the collar eyelet, for example, by means of a screw connection.

[0034] The pivot points 8, namely the mounting area 9 for a MacPherson strut, the mounting area 10 for a wishbone, and the mounting area 11 for a steering lever support, are formed integrally with the housing 2 by being molded with the housing 2 during the casting process. Alternatively, they could also be firmly connected to the housing 2, for example, via a welded joint.

[0035] Furthermore, the housing 2 has an inlet 20 for a coolant. Only one inlet 20 for the coolant is shown in Figure 1. Similarly, an outlet for the coolant is also provided on the lateral surface 3 or the second end face 5, which outlet is not shown in the figures.

[0036] During operation, the coolant flows through the interior 15 of the housing 2 and dissipates any frictional heat generated. The housing is fluid-tight, preventing brake dust from escaping from the housing 2 into the environment.

[0037] The housing 2 has an axis of symmetry or longitudinal axis which corresponds to an axis of rotation of a shaft 6 which extends through the housing 2 and via which the drive torque is transmitted to the wheel to be connected to the multi-disk brake 1.

[0038] Figure 2 shows the multi-disk brake 1 in a sectional view. This view shows that the housing 2 encloses an interior space 15 in which elements of the multi-disk brake 1 are arranged, in particular a plurality of first discs 16 that are connected in a rotationally fixed manner to the shaft 6 and separated from one another by intermediate spaces 18. A number of annular second discs 17 are arranged in the intermediate spaces 18 and are connected in a rotationally fixed manner to the housing 2. The first discs 16 and the second discs 17 can be brought into contact with one another by an axial relative movement in order to effect a braking operation.

[0039] In the sectional view in Figure 2 it can also be seen that the outer surface 3 of the housing 2 is thickened in the area of ​​the mounting area 10 in order to provide sufficient depth for the blind hole.

[0040] Figures 3 to 5 show the multi-disk brake 1 according to Figures 1 and 2 with a MacPherson strut 12 connected to the multi-disk brake 1. The MacPherson strut 12 has a lower end 13 formed by a damper cylinder in which a piston is movably mounted. The lower end 13 is received in the screw clamp, which forms the mounting area 9. Thus, the MacPherson strut is directly connected to the housing 2 of the multi-disk brake 1.

Claims

Patent claims 1. Multi-disk brake (1) for arrangement close to the wheel on a motor vehicle with independent wheel suspension, comprising - a housing (2) surrounding an interior space (15), wherein a longitudinal axis L of the housing (2) corresponds to an axis of rotation of a shaft (6) extending through the housing (2), - a plurality of slats arranged in the interior space (15) perpendicular to the longitudinal axis L, comprising a plurality of first slats (16) which are connected to the shaft (6) in a rotationally fixed manner and spaced apart from one another by intermediate spaces (18), and a plurality of second slats (17) arranged in the intermediate spaces (18) and connected to the housing (2) in a rotationally fixed manner, wherein the first and second slats (16, 17) can be brought into contact with one another by an axial relative movement for a braking operation, wherein the housing (2) is designed as a cylindrical wheel carrier with a first end face (4), a second end face (5) and a lateral surface (3) and has a receptacle (7) for a wheel bearing of the motor vehicle on the first end face (4) and has wheel-side articulation points (8) for at least one control arm on the second end face (5) and / or the lateral surface (3).

2. Multi-disk brake (1) according to claim 1, wherein the wheel-side articulation points (8) comprise mounting areas (9, 10, 11) for a MacPherson strut (12) and / or a steering lever carrier and / or wishbone of the motor vehicle.

3. Multi-disk brake (1) according to claim 2, wherein a mounting area (10) for a wishbone is designed as a blind hole with an internal thread.

4. Multi-disk brake (1) according to claim 3, wherein the mounting area (10) designed as a blind hole is arranged on the outer surface (3) of the housing (2).

5. Multi-disk brake (1) according to one of claims 2 to 4, wherein a mounting area (9) for a MacPherson strut (12) is designed as a screw clamp.

6. Multi-disk brake (1) according to claim 5, wherein the mounting area (9) designed as a screw clamp is arranged on the second end face (5) of the housing (2).

7. Multi-disk brake (1) according to one of claims 2 to 6, wherein a mounting area (11) for a steering lever carrier is designed as a cantilever eyelet.

8. Multi-disk brake (1) according to claim 7, wherein the mounting area (11) designed as a collar eyelet is arranged on the second end face (5) of the housing (2).

9. Multi-disk brake (1) according to one of claims 1 to 8, wherein the housing (2) further comprises at least one inlet (20) and one outlet for a coolant.

10. Motor vehicle with a braking system comprising at least one multi-disk brake (1) according to one of claims 1 to 9.

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