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, in particular for a wheel of a motor vehicle. [Background technology]

[0002] In motor vehicles with an electric motor as the drive motor, i.e. electric or hybrid vehicles, braking energy is progressively recovered by regeneration in order to increase energy efficiency. The aim is also to further reduce the drive resistance of such vehicles to increase energy efficiency. With regard to the drive resistance, attempts are being made to further reduce the residual torque on the brake calipers. With more frequent regeneration, the wheel brakes are used less and less, with the disadvantage that the brakes are no longer applied continuously, as a result of which, depending on the weather influences and climatic conditions, the friction coefficient of the brakes is significantly reduced and, in extreme cases, the brakes may even rust or stick.

[0003] Also, with today's brakes, brake dust can enter the environment as particulate matter and contribute to particulate pollution, which is generally undesirable. Summary of the Invention [Problem to be solved by the invention]

[0004] The aim of the present invention is to create a brake assembly that has good functionality over its service life, brakes reliably when required, and is still improved in terms of particulate emissions, a significant reduction of which may optionally be attainable. [Means for solving the problem]

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

[0006] An example embodiment of the present invention relates to a brake assembly, in particular on a wheel of a motor vehicle, having a first brake disc and a second brake disc, which are 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 with 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 a 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, or at least one first brake piston is provided, which applies pressure to the first positioned brake pad to press the second positioned brake pad against the first brake disc and which may also apply pressure at least indirectly to the second positioned brake pad to press the second positioned brake pad against the second brake disc, and the brake caliper comprises a base and / or a lid extending radially outwards over the two brake discs like a lid and shielding the spatial area between the brake discs from the outside. This results in a fundamentally closed brake assembly, which is also advantageous in that it is less susceptible to climatic and weather influences and can collect and store the generated brake dust. If only at least one first brake piston is provided, it may be configured as a one piston floating frame caliper, where the first piston applies pressure to a first brake pad to urge it against the first brake disc and a reaction force presses the frame on the opposite side against a second brake pad to apply pressure to the second brake pad to urge it against the second brake disc.

[0007] In an example embodiment, it is also advantageous that the brake discs have inner surfaces facing towards each other and outer surfaces facing away from each other, and the brake pads are pressed by the brake pistons only against the inner surfaces of the brake discs facing towards each other, so that for braking pressure is applied to each brake disc only on one side, the inside, so that the generated brake dust accumulates in the spatial regions between the brake discs and can be collected and stored in a targeted manner, without allowing large amounts of brake dust to escape.

[0008] It is also advantageous if the outer surface of the brake disc or at least one of the outer surfaces of one of the brake discs is provided with ribs on the outer surface of the brake disc, which serve to cool and increase the bending stiffness of the brake disc, thereby increasing stiffness, since pressure is applied only to 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 an example embodiment, it is also advantageous if a counter bearing engages on the outer surface of at least one or both of the brake discs to axially support the brake disc against axial bending, which can further increase stiffness to reduce bending of the brake disc.

[0010] In another embodiment example, it is also advantageous if a labyrinth seal is provided between the base and / or the lid and the radially outer region of the brake disc or at least one of the brake discs to seal the spatial region between the two brake discs, thereby ensuring that only a small amount of brake dust can escape.

[0011] It is also advantageous if the base and / or the lid and / or the brake caliper are provided with cooling air channels and / or cooling air openings for directing cooling air into and / or through the cooling air openings, which 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 collecting and storing assembly is provided on or adjacent to the base and / or the lid, thereby allowing the brake dust to be collected and stored. This ensures that the brake dust is stored in a spatially limited manner and is not evenly distributed in the spatial area between the two brake discs, so that during service the stored brake dust can also be removed. Thus, the brake dust can be properly located and is not released into the environment in an uncontrolled manner.

[0013] It is also advantageous if the brake dust collecting and storing assembly is fastened to or formed by the base, the lid and / or the wheel carrier by at least one holder, which makes it possible to achieve a permanently secure arrangement and / or integration.

[0014] It is also advantageous if the brake dust collecting and storage assembly comprises a blade, in particular a metal blade, which is particularly configured to be replaceable and capable of storing brake dust, which allows a storage for brake dust to be created cost-effectively.

[0015] It is also advantageous if the brake dust collecting and storage assembly comprises a collecting plate for collecting brake dust that extends substantially in a circumferential direction and is particularly configured to be replaceable, which allows the brake dust to be collected in a targeted manner.

[0016] The invention is described in more detail below on the basis of example embodiments with reference to the drawings, in which: [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic partial cross-sectional view of a first example embodiment of a brake assembly according to the present invention; [Diagram 2] 4 is a schematic partial cross-sectional view of a second example embodiment of a brake assembly according to the present invention. [Diagram 3] 3 is a further schematic partial cross-sectional view of the second example embodiment of the brake assembly according to the present invention shown in FIG. 2; [Figure 4] 11 is a schematic partial cross-sectional view of a third example embodiment of a brake assembly according to the present invention. [Diagram 5] 11 is a schematic partial cross-sectional view of a fourth example embodiment of a brake assembly according to the present invention. [Figure 6] FIG. 2 is a schematic diagram of the outer surface of a brake disc having a rib design and cooling channels. [Figure 7] 13 is a schematic partial cross-sectional view of a fifth example embodiment of a brake assembly according to the present invention. [Figure 8] 13 is a schematic partial cross-sectional view of a sixth example embodiment of a brake assembly according to the present invention. [Figure 9] FIG. 2 is a schematic rewind view of the cooling air openings and cooling air channels. [Figure 10] FIG. 2 is a schematic rollback view of the cooling air openings and channels and their throughflow. [Figure 11] FIG. 2 is a schematic diagram of an example embodiment of a brake disc in section. [Figure 12] FIG. 12 is a side view of the brake disc of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] In a schematic, partially cut-away view, FIG. 1 shows a brake assembly 1 for a wheel of a motor vehicle, the rim 3 of a wheel 4 being visible on a wheel carrier 2 .

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

[0020] The brake assembly 1 comprises a first brake disc 5 and a second brake disc 6, which are arranged spaced apart from each other and connected to each other in a rotatably fixed manner and may be arranged to rotate about a common axis of rotation, in particular on the wheel hub 29.

[0021] Between the two brake discs 5, 6 there is a spatial area 7 in which a brake caliper 8 with a brake piston 9 is arranged. Thus, a brake caliper 8 with at least one brake piston 9, in particular with a plurality of brake pistons 9, is arranged axially between the two brake discs 5, 6. At least one first brake piston 9 is provided, which can press a first arranged brake pad 10 against the first brake disc 5 by applying a pressure to the first arranged brake pad 10, and at least one second brake piston 9 is provided, which can press a second arranged brake pad 11 against the second brake disc 6 by applying a pressure to the second arranged brake pad 11. The brake caliper 8 is supported by the wheel carrier 2.

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

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

[0024] 1 shows that the brake discs 5, 6 have inner surfaces 15 facing towards each other and outer surfaces 16 facing away from each other, and that the brake pads 10, 11 are pressed by the brake piston 9 only against the inner surfaces 15 of the brake discs 5, 6 facing towards each other. As a result, an axial force acts on the brake discs 5, 6 from the inside to the outside, which causes said brake discs to bend outwards.

[0025] It is therefore advantageous if the outer surface 16 of the brake discs 5, 6, or at least one of the outer surfaces 16 of the brake discs 5, 6, is provided with ribs 17 on the outer surface 16 of the brake discs 5, 6, which serve to cool the brake discs 5, 6 and increase the bending stiffness of the brake discs 5, 6, thereby improving the cooling of the brake discs 5, 6 and / or increasing the bending stiffness of the brake discs 5, 6.

[0026] Figure 4 shows an alternative view without ribs, where a counter bearing 18 engages on the outer surface 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 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 a rib 17, as shown in Figure 1.

[0027] FIG. 1 also shows the provision of a labyrinth seal 19 between the base 13 and / or the lid 14 and the brake disc 5, 6 or at least one of the brake discs 5, 6 in a radially outer region thereof to seal the space region 7 between the two brake discs 5, 6.

[0028] 2, 3, 5, and 7-10 show different example embodiments of the brake assembly 1 in different views, where the base 13 and / or the lid 14 and / or the brake caliper 8 are provided with cooling air channels 20 and / or cooling air openings 21 or configured to have cooling air in and / or through them. Thus, air can pass through the brake caliper 8 into the spatial region 7 and flow through or through the brake pads 10, 11, the brake discs 5, 6, and the brake caliper 8 itself to effectively cool the brake fluid. With reference to FIG. 7 or 8, the air flow path can be approximately S-shaped.

[0029] 9 and 10, air may flow into different cooling air openings 21 and then be combined and directed into the cooling air channels 20. The lid 14 may be configured such that the cooling air channels 20 may be bypassed or additional manifolds 28 may be used.

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

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

[0032] In one advantageous example embodiment, for example, referring to FIG. 5, a brake dust collection and storage assembly 23 may be provided on or adjacent to the base 13 and / or the lid 14, thereby allowing brake dust to be collected and stored.

[0033] Also with reference to FIG. 5, it is advantageous if the brake dust collecting and storing assembly 23 is fastened to the lid and / or 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 may optionally include blades 24, particularly metal blades, that are specifically configured to be replaceable for storing brake dust.

[0035] The brake dust collecting and storing assembly 23 may also comprise a substantially circumferentially extending collecting plate 25, which is particularly configured to be replaceable for collecting brake dust. The collecting plate 25 advantageously closes the spatial area 7 radially and axially to the outside and rests firmly against the brake caliper 8 on a sealing surface 26 or on a plurality of sealing surfaces 26.

[0036] The brake pistons 9 advantageously act only in response to pressure and may be implemented in a multi-piston fixed caliper configuration or in a floating piston configuration with mainly one brake piston 9 or several brake pistons 9. The brake caliper 8 may also advantageously radially seal sub-segments of the friction pairing working space between the brake discs 5, 6 and the brake pads 10, 11 as a type of labyrinth seal, so that the emission of brake dust is further limited.

[0037] Figures 11 and 12 show another embodiment example of a brake disc 5, 6 configured with annularly arranged webs 22 separating the grooves 30 from one another on their outer side, such that a fluid flow 32 can flow through the grooves 30 between the webs 22 axially from the radially inner side and radially outward along the brake disc 5, 6. An annular cover part 31 is provided radially on the outer side of the brake disc 5, 6 and is arranged spaced apart from the brake disc 5, 6, such that the fluid flow 32 can flow down radially outward between the cover part 31 and the brake disc 5, 6. In Figure 11 it can be seen that the cover part 31 is conical and approaches the brake disc 5, 6 from the radially inner side towards the radially outer side, nevertheless 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 forwardly curved, or alternatively rearwardly curved, or radially aligned.

[0039] The cover portion 31 is optionally constructed and / or connected in a thermally conductive manner to improve heat dissipation. [Explanation of symbols]

[0040] 1 Brake Assembly 2 Wheel carrier 3 Rims 4 Wheels 5 Brake discs 6 Brake discs 7 Spatial area 8 Brake caliper 9 Brake piston 10 Brake pads 11. Brake pads 12 Back Plate 13 Brake caliper base 14 Lid 15. Inside 16 Exterior 17 Ribs 18 Counter bearing 19 Labyrinth Seal 20 Cooling Air Channels 21 Cooling air opening 22 Groove 23 Brake dust collection and storage assembly 24 Blades 25 Collection Plate 26 Sealing surface 27 Holder 28 Manifold 29 Wheel hub 30 Web 31 Cover part 32 Fluid flow

Claims

1. A brake assembly (1) for a wheel (4) of a motor vehicle, comprising: The brake disc (5) and the second brake disc (6) are arranged spaced apart from each other, connected to each other in a non-rotating manner, and can be arranged to rotate about a common rotation axis on the wheel carrier (2), A brake caliper (8) having a brake piston (9) is arranged axially between the two brake discs (5, 6), At least one first brake piston (9) is provided, by which a pressure can be applied to a first arranged brake pad (10) to press said first arranged brake pad (10) against said first brake disc (5), and optionally at least one second brake piston (9) is provided, by which a pressure can be applied to a second arranged brake pad (11) to press said second arranged brake pad (11) against said second brake disc (6), or or At least one first brake piston (9) is provided, which is capable of applying pressure to a first arranged brake pad (10) to press said first arranged brake pad (10) against said first brake disc (5) and of at least indirectly applying pressure to a second arranged brake pad (11) to press said second arranged brake pad (11) against said second brake disc (6); the brake caliper (8) extends radially outwardly over the two brake discs (5, 6) like a lid and shields the spatial region (7) between the brake discs (5, 6) from the outside, said brake discs (5, 6) having inner surfaces (15) facing towards each other and outer surfaces (16) facing away from each other, said brake pads (10, 11) being pressed by said brake piston (9) only against said inner surfaces (15) of said brake discs (5, 6) facing towards each other, A brake assembly (1), characterized in that the outer surfaces (16) of the brake discs (5, 6), or at least one outer surface (16) of one brake disc (5, 6), are provided with ribs (17) for improving cooling of the brake discs (5, 6) and / or for increasing the bending stiffness of the brake discs (5, 6).

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

3. 2. A brake assembly (1) according to claim 1, characterized in that a labyrinth seal (19) is provided between the brake caliper (8) and the brake disc (5, 6) or a radially outer area of ​​at least one of the brake discs (5, 6) to seal the spatial area (7) between the two brake discs (5, 6).

4. A brake assembly (1) as described in 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 spatial area (7).

5. 2. A brake assembly (1) according to claim 1, characterized in that a brake dust collecting and storing assembly (23) is provided on or adjacent to the brake caliper (8) by means of which brake dust can be collected and stored.

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

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

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

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