Brake assembly

Abstract

The present invention relates to a brake assembly having a first brake disc and a second brake disc arranged at a distance from each other, connected to each other in a pivotally fixed manner and which may be arranged to rotate around a common axis of rotation, in particular on a wheel carrier, in which a brake caliper having a brake piston is arranged axially between the two brake discs, at least one first brake piston is provided, which applies pressure to the first arranged brake pads, thereby pressing the first arranged brake pads against the first brake disc, and optionally at least one second brake piston is provided, which applies pressure to the second arranged brake pads, thereby pressing the first arranged brake pads against the first brake disc, The second positioned brake pad is pressed against the second brake disc by applying pressure to the rake pad, or at least one first brake piston is provided, which presses the first positioned brake pad against the first brake disc by applying pressure to the first positioned brake pad and may further press the second positioned brake pad against the second brake disc by at least indirectly applying pressure to the second positioned brake pad, and the brake caliper comprises a base and / or a lid extending radially outwardly across the two brake discs like a lid and shielding the spatial area between the brake discs from the outside.

Description

Technical Field

[0001] The present invention relates to a brake assembly, and more particularly to a brake assembly for an automobile wheel.

Background Art

[0002] In automobiles having an electric motor as a drive motor, that is, electric vehicles or hybrid vehicles, braking energy is increasingly recovered by regeneration in order to improve energy efficiency. It is also an object to further reduce the driving resistance of such automobiles to improve energy efficiency. With regard to the driving resistance, attempts have been made to further reduce the residual torque on the brake caliper. Due to more frequent regeneration, the wheel brakes are used less and less, and have the drawback that the brakes are no longer continuously depressed. As a result, depending on the weather and climatic conditions, the friction coefficient of the brakes is significantly reduced, and in extreme cases, the brakes may rust or stick.

[0003] Also, in today's brakes, brake dust may enter the environment as particulate matter and contribute to particulate matter pollution, which is generally undesirable.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to create a brake assembly that has good functionality over its service life, reliably brakes when necessary, and is still improved in terms of particulate matter emissions. A significant reduction in particulate matter emissions may optionally be achievable.

Means for Solving the Problems

[0005] This object is achieved by the features according to claim 1.

[0006] One exemplary embodiment of the present invention relates to a brake assembly, particularly for an automotive wheel, which are spaced apart from each other and Mutually rotating Do not mode Connect without subsequently, a brake assembly having a first brake disc and a second brake disc, which can be arranged to rotate about a common axis of rotation, particularly on a wheel carrier. A brake caliper having a brake piston is axially arranged between the two brake discs, at least one first brake piston is provided, and by applying pressure to the first arranged brake pad, the first arranged brake pad is pressed against the first brake disc. Further optionally, a second brake piston is provided, and by applying pressure to the second arranged brake pad, the second arranged brake pad is pressed against the second brake disc, or at least one first brake piston is provided, and by applying pressure to the first arranged brake pad, the first arranged brake pad is pressed against the first brake disc, and further, by being able to apply pressure to the second arranged brake pad at least indirectly, the second arranged brake pad is pressed against the second brake disc. The brake caliper extends radially outwardly across the two brake discs like a lid, and comprises a base body and / or a lid that shields the space region between the brake discs from the outside. Thereby, a basically closed brake assembly is provided, which has the advantage of being hardly affected by climate and weather influences and being able to collect and store the generated brake dust. If only at least one first brake piston is provided, it can be configured as a one-piston floating frame caliper. The first piston applies pressure to the first brake pad to press the first brake pad against the first brake disc, and the reaction force presses the frame on the opposite side against the second brake pad, applying pressure to the second brake pad to press the second brake pad against the second brake disc.

[0007] In one exemplary embodiment, it is also advantageous for the brake disc to have inner surfaces facing each other and outer surfaces facing away from each other, and for the brake pads to be pressed only against the inner surfaces of the brake disc facing each other by the brake pistons. Thus, for braking, pressure is applied to each brake disc only on the inner side, on one side only, so that the generated brake dust accumulates in the space region between the brake discs and can be collected and stored in a standardized manner without allowing a large amount of brake dust to escape.

[0008] Also, it is advantageous if the outer surface of the brake disc or at least one outer surface of one brake disc functions to improve the cooling of the brake disc and / or increase the bending stiffness of the brake disc, such that ribs are provided on the outer surface of the brake disc. This increases the stiffness because pressure is applied to only one side of the brake disc for braking. This can also improve the cooling of the brake and the cooling fluid used. The cooling fluid can optionally be air.

[0009] In one exemplary embodiment, it is also advantageous for a counter bearing to engage on the outer surface of at least one or both of the brake discs in order to axially support the brake disc against axial bending. This can further increase the stiffness to reduce the bending of the brake disc.

[0010] In another exemplary embodiment, it is also advantageous to provide a labyrinth seal between the base body and / or the cover and the radially outer region of the brake disc or at least one brake disc to seal the space region between the two brake discs. This ensures that only a small amount of brake dust can escape.

[0011] Furthermore, it is advantageous if the base body and / or the lid and / or the brake caliper are provided with cooling air channels and / or cooling air openings, such that cooling air can be introduced into the interior and / or passed through the cooling air openings. This can improve the cooling of the brake assembly, especially due to the air transfer effect of the brake disc itself.

[0012] In another embodiment, it is also advantageous if a brake dust collection and storage assembly is provided on and / or above the base body and / or the lid or adjacent thereto, such that brake dust can be collected and stored. Thereby, it is ensured that the brake dust is stored in a spatially limited manner and is not evenly distributed in the space region between the two brake discs. As a result, during servicing, the stored brake dust can also be removed. Thus, the brake dust can be properly disposed of and is not released into the environment in an uncontrolled manner.

[0013] Moreover, it is expedient if the brake dust collection and storage assembly is clamped to the base body, the lid, and / or the wheel carrier by means of at least one holder or is formed by the base body and the lid. This makes it possible to achieve a permanently secure arrangement and / or integration.

[0014] Furthermore, the brake dust collection and storage assembly is particularly configured to be able to store and exchange the brake dust Mesh and is also advantageous when it contains Mesh especially metal. This makes it possible to create a cost-effective storage for the brake dust.

[0015] Moreover, it is advantageous if the brake dust collection and storage assembly comprises a collection plate for collecting the brake dust, which extends substantially in the circumferential direction and is particularly configured to be exchangeable. This makes it possible to collect the brake dust in a targeted manner.

[0016] The present invention will be described in detail below based on embodiments with reference to the drawings. The drawings show the following.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

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Figure 4

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Figure 12

Modes for Carrying Out the Invention

[0018] In the schematic partial cross-sectional view, FIG. 1 shows a brake assembly 1 of an automobile wheel, and the rim 3 of the wheel 4 can be seen on the wheel carrier 2.

[0019] The motor vehicle is configured in particular as a motor vehicle having an internal combustion engine with pure electric drive (BEV) or as a hybrid vehicle having an internal combustion engine and an electric motor as a drive motor (HEV, PHEV). PHEV is the abbreviation for a plug-in hybrid vehicle.

[0020] The brake assembly 1 comprises a first brake disk 5 and a second brake disk 6, which are arranged spaced apart from one another, Mutually rotating Do not mode Connect without continued and can be arranged so as to be rotatable about a common axis of rotation, in particular on the wheel hub 29.

[0021] There is a spatial region 7 between the two brake disks 5, 6, in which a brake caliper 8 having a brake piston 9 is arranged. Thus, the brake caliper 8 having at least one brake piston 9, in particular a plurality of brake pistons 9, is arranged axially between the two brake disks 5, 6. At least one first brake piston 9 is provided, and the first arranged brake pad 10 can be pressed against the first brake disk 5 by applying pressure to the first arranged brake pad 10, and at least one second brake piston 9 is provided, and the second arranged brake pad 11 can be pressed against the second brake disk 6 by applying pressure to the second arranged brake pad 11. The brake caliper 8 is supported by the wheel carrier 2.

[0022] Each back plate 12 is provided between the brake piston 9 and the respective brake pads 10, 11 in order to equalize the pressing force from the brake piston 9 to the brake pads 10, 11.

[0023] The brake caliper 8 also comprises a base body 13 and / or a cover 14, which extends radially outwards across the two brake discs 5, 6 like a cover and shields the space region 7 between the brake discs 5, 6 from the outside. This protects the space region 7 with the assemblies and components arranged therein from weather, dirt, and climate and makes it difficult for brake dust to escape. However, this type of enclosure also concentrates the frictional heat generated. The base body 13 and the cover 14 can also be arbitrarily combined.

[0024] Figure 1 shows that the brake discs 5, 6 comprise an inner face 15 facing each other and an outer face 16 facing away from each other, and that the brake pads 10, 11 are pressed against the inner faces 15 of the brake discs 5, 6 facing each other only by the brake pistons 9. As a result, the axial force acts on the brake discs 5, 6 from the inside outwards, causing the brake discs to bend outwards.

[0025] Therefore, it is advantageous if the outer faces 16 of the brake discs 5, 6, or at least one outer face 16 of the brake discs 5, 6, have ribs 17 provided on the outer faces 16 of the brake discs 5, 6 to improve the cooling of the brake discs 5, 6 and / or increase the bending stiffness of the brake discs 5, 6 and function to cool the brake discs 5, 6 and increase the bending stiffness of the brake discs 5, 6.

[0026] Figure 4 shows an alternative view without ribs, in which a counter bearing 18 engages on the outer face 16 of at least one or both of the brake discs 5, 6 to axially support the brake discs 5, 6 against axial bending. The counter bearing 18 is supported on the brake caliper 8 or on the base body 13 of the brake caliper 8. The counter bearing 18 can be configured, for example, as a floating caliper. However, a design with a counter bearing 18 can be provided in combination with the ribs 17, as shown in Figure 1.

[0027] FIG. 1 also shows providing a labyrinth seal 19 between the base body 13 and / or the cover 14 and the brake disks 5, 6 or at least the radially outer region of one of the brake disks 5, 6 to seal the space region 7 between the two brake disks 5, 6.

[0028] FIGS. 2, 3, 5, and 7 - 10 show different exemplary embodiments of the brake assembly 1 in different figures, which provide cooling air channels 20 and / or cooling air openings 21 in the base body 13 and / or the cover 14 and / or the brake caliper 8, or are configured to allow cooling air to enter and / or pass through. Thus, air can enter the space region 7 through the brake caliper 8, flow through or past the brake pads 10, 11, the brake disks 5, 6, and the brake caliper 8 itself, effectively cooling the brake fluid. Referring to FIG. 7 or 8, the fluid path of the air can be approximately S-shaped.

[0029] According to FIGS. 9 and 10, air can flow into different cooling air openings 21 and then be combined and directed into the cooling air channels 20. The cover 14 can be configured such that the cooling air channels 20 can be bypassed or an additional manifold 28 can be used.

[0030] For example, referring to FIG. 6, grooves 30 that allow cooling air to pass through can also be provided in the brake disks 5, 6. The grooves 30 are separated from each other by webs 22, and the grooves 30 or the webs 22 can be configured and arranged to be curved forward, curved backward, radial, or concentric. The webs 22 create an air transfer effect to allow cooling air to flow through the grooves 30. The webs 22 and the grooves 30 can be provided on one side of the brake disks 5, 6 or on both sides of the brake disks 5, 6.

[0031] This also makes it possible to prevent water or dust from entering the regions of the brake pads 10, 11 and the corresponding friction surfaces.

[0032] In an advantageous exemplary embodiment, for example, referring to FIG. 5, the brake dust collection and storage assembly 23 can be provided on and / or adjacent to the base body 13 and / or the lid 14, thereby enabling collection and storage of brake dust.

[0033] Also referring to FIG. 5, it is advantageous when the brake dust collection and storage assembly 23 is clamped to the lid and / or the wheel carrier by at least one holder 27 or is formed by the wheel carrier or the lid.

[0034] The brake dust collection and storage assembly 23 is specifically configured to be 、 exchangeable for storing brake dust Mesh 24, especially metal Mesh and can optionally include.

[0035] The brake dust collection and storage assembly 23 can also include a collection plate 25 that extends substantially circumferentially and is specifically configured to be exchangeable for collecting brake dust. The collection plate 25 advantageously closes the space region 7 radially and axially with respect to the outside and is firmly placed against the brake caliper 8 on the sealing surface 26 or a plurality of sealing surfaces 26.

[0036] The brake piston 9 preferably acts only in response to pressure and can be implemented in a multi-piston fixed caliper configuration or a floating piston configuration mainly having one brake piston 9 or a plurality of brake pistons 9. Also, it is advantageous that the brake caliper 8 can radially seal a sub-segment of the friction pairing working space between the brake disks 5, 6 and the brake pads 10, 11 as a type of labyrinth seal so that the release of brake dust is further restricted.

[0037] Figures 11 and 12 show another exemplary embodiment of the brake disks 5, 6 configured to have annularly arranged webs 22 that separate the grooves 30 from each other on their outer sides such that the fluid flow 32 can flow axially from the radially inner side and radially outward along the brake disks 5, 6 through the grooves 30 between the webs 22. An annular cover portion 31 is provided radially on the outside of the brake disks 5, 6 and is arranged spaced apart from the brake disks 5, 6 such that the fluid flow 32 can flow radially outward between the cover portion 31 and the brake disks 5, 6. In FIG. 11, the cover portion 31 is conical, approaching the brake disks 5, 6 from the radially inner side to the radially outer side, yet leaving a gap or space on the radially outer side to allow the fluid flow 32 to flow out. The webs 22 are

[0038] Advantageously, they are curved forward, or alternatively curved backward, or aligned radially.

[0039] The cover portion 31 is optionally configured and / or connected with a heat-conductive specification to improve heat dissipation.

Explanation of Reference Numerals

[0040] 1 Brake assembly 2 Wheel carrier 3 Rim 4 Wheel 5 Brake disk 6 Brake disk 7 Space region 8 Brake caliper 9 Brake piston 10 Brake pad 11 Brake pad 12 Back plate 13 Base body of the brake caliper 14 Cover 15 Inner surface 16 Outer surface 17 Rib 18 Counter bearing 19 Labyrinth seal 20 Cooling air channel 21 Cooling air opening 22 Groove 23 Brake dust collection and storage assembly 24 Mesh 25 Collection plate 26 Sealing surface 27 Holder 28 Manifold 29 Wheel hub 30 Web 31 Cover part 32 Fluid flow

Claims

Claim 1: A brake assembly (1) for a wheel (4) of a motor vehicle, comprising a first brake disc (5) and a second brake disc (6) which are spaced apart from one another, are connected in a non-rotatable manner relative to one another, and are arranged so as to be rotatable about a common axis of rotation on a wheel carrier (2), a brake caliper (8) having a brake piston (9) being axially arranged between the two brake discs (5, 6), at least one first brake piston (9) being provided, by means of which pressure can be applied to a first arranged brake pad (10) to press the first arranged brake pad (10) against the first brake disc (5), and optionally at least one second brake piston (9) being provided, by means of which pressure can be applied to a second arranged brake pad (11) to press the second arranged brake pad (11) against the second brake disc (6), or or at least one first brake piston (9) being provided, by means of which pressure can be applied to a first arranged brake pad (10) to press the first arranged brake pad (10) against the first brake disc (5), and pressure can be applied at least indirectly to a second arranged brake pad (11) to press the second arranged brake pad (11) against the second brake disc (6), the brake caliper (8) extending radially outwards over the two brake discs (5, 6) like a lid and shielding the space region (7) between the brake discs (5, 6) from the outside, the brake discs (5, 6) having inner faces (15) facing one another and outer faces (16) facing away from one another, and the brake pads (10, 11) being pressed only against the inner faces (15) of the brake discs (5, 6) facing one another by the brake pistons (9). On the outer surface (16) of the brake disks (5, 6) or at least one outer surface (16) of one of the brake disks (5, 6), ribs (17) are provided for improving the cooling of the brake disks (5, 6) and / or increasing the bending stiffness of the brake disks (5, 6). The brake assembly (1) is characterized by this.

2. The brake assembly (1) according to claim 1, characterized in that a counter bearing (18) engages on the outer surface (16) of at least one or both of the brake disks (5, 6) in order to axially support the brake disks (5, 6) against axial bending.

3. The brake assembly (1) according to claim 1, characterized in that a labyrinth seal (19) is provided between the brake caliper (8) and the brake disks (5, 6) or the radially outer region of at least one brake disk (5, 6) to seal the space region (7) between the two brake disks (5, 6).

4. The brake assembly (1) according to claim 1, characterized in that the brake caliper (8) is provided with a cooling air channel (20) and / or a cooling air opening (21) for passing cooling air into the space region (7).

5. The brake assembly (1) according to claim 1, characterized in that a brake dust collection and storage assembly (23) is provided on or adjacent to the brake caliper (8), whereby brake dust can be collected and stored.

6. The brake assembly (1) according to claim 5, characterized in that the brake dust collection and storage assembly (23) is fastened to the brake caliper (8) and / or the wheel carrier (2) by at least one holder (27) or is formed by the brake caliper (8).

7. The brake assembly (1) according to claim 5 or 6, characterized in that the brake dust collection and storage assembly (23) comprises a mesh (24) for storing the brake dust.

8. The brake assembly (1) according to claim 1, characterized in that the brake dust collection and storage assembly (23) comprises a collection plate (25) extending substantially in the circumferential direction and / or the radial direction for collecting the brake dust.

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