BRAKE DEVICE AND VEHICLE, IN PARTICULAR A COMMERCIAL VEHICLE

Description

[0001] The invention relates to a braking device for a vehicle, in particular for a commercial vehicle. The invention also relates to a vehicle, in particular a commercial vehicle.

[0002] Braking devices are known from the prior art. One known braking device comprises a brake caliper, a brake carrier, and a bolt guide with a bolt extending along an axis. The bolt guide is configured and arranged to support the brake caliper displaceably along the axis relative to the brake carrier. The bolt guide has a sleeve. Such sleeves can be made of brass, for example, and / or comprise a metal-polymer, for example, a metal coated with a polymer.

[0003] DE 10 2004 029 462 A1 discloses a floating-caliper disc brake with two bolt guides. A second bolt guide has a multi-part guide bolt, comprising a bolt, an elastic sleeve surrounding the bolt, and a sliding sleeve surrounding the elastic sleeve. The elastic sleeve allows manufacturing tolerances to be compensated, preventing mutual tilting of the two bolt guides. For targeted adjustment of the elastic effect, the elastic sleeve is provided with a suitable profile on the inside and / or outside.

[0004] DE 3413737 A1 discloses a spot-type disc brake with a sleeve having one or more longitudinal slots to ensure easy insertion of the sleeve into a brake caliper bore when using a comparatively stiff, high-force-absorbing material. DE 3443550 A1 also discloses a spot-type disc brake with a sleeve.

[0005] DE 10 2013 005 445 A1 discloses a disc brake for a commercial vehicle. A sliding bushing of a floating bearing is designed as a partially radially deformable, one-piece spring element that is secured against displacement in a brake caliper and is supported on a guide bar, enclosing the latter in a sheath-like manner.

[0006] US4194597A1 discloses a disc brake with a bolt guide arranged in the brake caliper for receiving two bolts arranged on the brake carrier. The bolt guide comprises a cylindrical elastic damping element arranged inside the bolt guide and extending axially along the bolt guide. The damping element is arranged between the brake caliper and a bushing enclosing the bolt.

[0007] DE102007001213A1 discloses a minimization of the residual grinding torque after an application process of the disc brake by a wear-related compensation of the air gap. The goal is achieved by holding the bushing on the bolt during a braking-related displacement.

[0008] WO9010162A1 discloses a disc brake with a bolt guide, in which the floating bearing has an elastic bushing for vibration damping, which acts as a damping element between the housing and the wheel suspension. However, the damping properties, i.e., the ability to dampen mechanical oscillations and / or vibrations, are in need of improvement. Improved damping properties are particularly necessary for use in pneumatic brake systems with strict noise emission requirements, for example, in buses.

[0009] The invention is therefore based on the object of enabling reliable and effective damping in a cost-efficient manner.

[0010] This object is achieved by a braking device according to claim 1 and a vehicle, in particular a commercial vehicle, according to the independent claim. The subclaims specify preferred developments of the invention.

[0011] According to the invention, a braking device for a vehicle, in particular for a commercial vehicle, is provided. The braking device comprises a brake caliper, a brake carrier, and a bolt guide with a bolt extending along an axis, wherein the bolt guide is designed and arranged to mount the brake caliper displaceably along the axis relative to the brake carrier, wherein the bolt guide has a sleeve with an inner surface and with an at least partially hollow cylindrical section. The sleeve has a plurality of circumferentially extending recesses on the inner surface, wherein the bolt guide has a damping element arranged in each of the recesses. Relative to the cylinder axis, the damping elements protrude from the recesses radially inward in the direction of the bolt. Thus, the inner surface of the sleeve is not directly supported on the bolt.

[0012] The invention has recognized that sleeves having circumferential recesses can be used to achieve noise dampening in a reliable and cost-effective manner.

[0013] The sleeve is arranged around the bolt. The sleeve rests on the bolt with its inner surface. The sleeve is arranged around the bolt in such a way that the sleeve rests on the cylindrical portion. This allows vibrations and / or mechanical oscillations to be transmitted between the bolt and the sleeve, which are dampened according to the invention. For this purpose, the sleeve has circumferentially extending recesses. The recesses are circumferentially extending depressions in the otherwise at least partially hollow cylindrical portion. The circumferential arrangement of the recesses achieves improved damping properties through modified resonance properties.

[0014] Preferably, each recess extends completely around the circumference. Each recess thus runs along the circumferential direction around the entire inner surface of the at least partially hollow-cylindrical section. Additionally or alternatively, each recess can be interrupted by a butt joint. This makes it possible for the sleeve to be cost-effectively manufactured from a sheet or strip material. Each recess is arranged such that, apart from the butt joint, the recess extends completely in the circumferential direction. In this embodiment, it is possible for a damping element to be arranged particularly effectively in the recess.

[0015] Preferably, the recesses extend rotationally symmetrically around a cylinder axis of the sleeve. The sleeve defines the cylinder axis through the at least hollow-cylindrical section. The rotational symmetry of each recess enables particularly effective manufacturing of the sleeve. In this embodiment, a damping element can be arranged in the recess, particularly advantageously, since the rotational symmetry eliminates the need for a radial alignment of the damping element.

[0016] Preferably, the bolt guide has a damping element arranged in each recess. The damping element is arranged in the recess. Thus, the damping element can ensure that the inner surface of the sleeve is not directly supported on the bolt, but rather that the sleeve is indirectly supported on the bolt via the damping element. Thus, mechanical vibrations between the bolt and the sleeve are transmitted via the damping element and are dampened by the damping element.

[0017] The damping element is preferably annular. This allows for effective positioning of the damping element in the recess and thus around the bolt.

[0018] Preferably, the damping element is o-ring-shaped. InIn this embodiment, the damping element is arranged completely around the bolt in the recess. This results in rotationally symmetrical damping and a particularly simple arrangement of the damping element within the recess. In other embodiments, the damping element can also have other shapes, for example, the shape of a C-ring, i.e., an open ring.

[0019] Preferably, several of the recesses each have the same width and depth. This allows for particularly effective production of the recesses in the sleeve, since each of the recesses has the same geometry. Alternatively or additionally, several of the recesses each have a different width and / or depth. This allows for the damping properties to be adjusted based on the geometries of the recesses.

[0020] Preferably, the bolt guide comprises a plurality of damping elements, each arranged in a recess, with several of the damping elements having the same dimensions. This enables an effective improvement of the damping properties, while ensuring particularly effective and simple production, since the damping elements are interchangeable. Alternatively or additionally, the bolt guide comprises a plurality of damping elements, each arranged in a recess, with several of the damping elements having different dimensions. This enables a targeted adjustment of the damping properties.

[0021] In other words, one embodiment can be specified in a non-limiting manner as follows: In the prior art, bolt guides for pneumatic disc brakes are known, using a sleeve made of brass or metal-polymer. One disadvantage is the poor damping properties, particularly for pneumatic disc brakes with strict noise emission requirements, for example, in the bus segment. To overcome this disadvantage cost-effectively, it is proposed to provide a standard sleeve with radial recesses in which a damping element can be arranged. Ideally, the damping element is an O-ring. Furthermore, multiple O-rings can be provided to achieve a higher damping factor, or different O-ring sizes can be used to positively influence the damping properties of the damping elements.A main advantage is the usability of standard components, which avoids the need for specific and therefore costly damping elements.

[0022] According to one aspect of the invention, a vehicle, in particular a commercial vehicle, is provided. The vehicle, in particular a commercial vehicle, comprises a braking device according to the invention. Preferably, the braking device comprises a feature described above as advantageous and / or optional in order to achieve an associated technical effect.

[0023] Further advantages and features of the invention as well as its technical effects emerge from the figures and the description of the preferred embodiments shown in the figures. Fig. 1 a section through a braking device according to an embodiment of the invention; Fig. 2 a perspective view of a sleeve of a braking device according to an embodiment of the invention; Fig. 3a schematic representation of a section through a sleeve of a braking device according to an embodiment of the invention; and Fig. 4 a schematic representation of a vehicle, in particular a commercial vehicle, according to an embodiment of the invention. Figure 1 shows a section through a braking device 10 according to an embodiment of the invention;

[0024] The braking device 10 is designed to brake a vehicle 100a, in particular a commercial vehicle 100b. Such a vehicle 100a, in particular a commercial vehicle 100b, is described with reference to Figure 4 The vehicle 100a, in particular commercial vehicle 100b, is referred to below as vehicle 100a, 100b.

[0025] As in Figure 1As shown, the braking device 10 comprises a brake carrier 28, a bolt guide 20, and a brake caliper 27. The brake caliper 27 is, for example, a fixed caliper, a floating caliper, or a pendulum caliper. The brake caliper 27 is designed to apply brake pads over a brake disc (not shown). For this purpose, the bolt guide 20 has a bolt 21 extending along an axis A. The bolt 21 has a cylindrical outer surface 32. The bolt 21 is essentially hollow-cylindrical and can be tensioned relative to the brake carrier 28 by means of a tensioning element 31 arranged within the bolt 21.

[0026] The bolt guide 20 is designed and arranged to displaceably mount the brake caliper 27 along the axis A relative to the brake carrier 28. For this purpose, the bolt 21 is arranged at least partially displaceably in a bore 34. The bore 34 is in particular a blind hole and / or a through-hole in the brake caliper 27. The relative movement between the brake caliper 27 and the brake carrier 28 generates vibrations or mechanical oscillations, which may imply the emission of noise.

[0027] The bolt guide 20 has a sleeve 22 or bearing bush with an inner surface 23 (see Figure 2) and with an at least partially hollow cylindrical section 26. The hollow cylindrical section 26 of the sleeve 22 defines a cylinder axis Z. The at least partially hollow cylindrical shape of the section 26 of the sleeve 22 defines a circumferential direction. The section 26 extends along the cylinder axis Z and the circumferential direction runs perpendicular to the cylinder axis Z. The cylinder axis Z is aligned along the axis A, along which the bolt 21 extends and along which the brake caliper 27 and the brake carrier 28 are mounted so as to be displaceable relative to one another. The sleeve 22 has a cylindrical outer surface 33. The bore 34 and the sleeve 22 or bearing bush are therefore provided for guiding the bolt 21 and are arranged as a guide system for the bolt 21.

[0028] The sleeve 22 is made of a metal, for example brass, to achieve advantageous sliding properties, or for the same reason of steel with a plastic coating, for example PTFE. The sleeve 22 is made of a strip material and therefore has a butt joint 22 (see Figure 2 ). In another embodiment, the sleeve 22 can also be made of plastic.

[0029] As in Figure 1As shown, the sleeve 22 is arranged around the bolt 21. The sleeve 22 is supported with the inner surface 23 of the sleeve 22 on the outer surface 32 of the bolt 21. The sleeve 22 and the bolt 21 are arranged coaxially to one another. Along the cylinder axis Z or along the axis A, the bolt 21 has a greater extension than the sleeve 22. The sleeve 22 is arranged in a section of the bolt 21 close to the brake carrier 28. A bolt seal 29 is arranged between the sleeve 22 and the brake carrier 28. The bolt seal 29 is made of an elastic material, for example a plastic, and has a wave-like profile.

[0030] The sleeve 22 has two circumferentially extending recesses 24a, 24b on the inner surface 23 in the at least partially hollow-cylindrical section 26. This means that the sleeve 22 has a plurality of circumferentially extending recesses 24a, 24b on the inner surface 23. The recesses 24a, 24b extend radially from the inner surface 23 into the sleeve 22.

[0031] Each of the recesses 24a, 24b is rotationally symmetrical about the cylinder axis Z of the sleeve 22, see also Figure 2 . The circumferential direction is arranged perpendicular to the cylinder axis Z. Thus, the recesses 24a, 24b are recesses running perpendicular to the cylinder axis Z.

[0032] As in Figure 1As shown, the bolt guide 20 has a damping element 25a, 25b arranged in each of the recesses 24a, 24b. Each of the damping elements 25a, 25b is annular, in particular O-ring-shaped. The damping elements 25a, 25b are arranged in the recesses 24a, 24b such that the damping elements 25a, 25b protrude from the recesses 24a, 24b. Relative to the cylinder axis Z, the damping elements 25a, 25b protrude radially inward from the recesses 24a, 24b in the direction of the bolt 21. Thus, the inner surface 23 of the sleeve 22 is not directly supported on the bolt 21. The sleeve 22 is supported on the inner surface 23 of the sleeve 22 indirectly via the damping elements 25a, 25b on the bolt 21. Thus, mechanical vibrations between the bolt 21 and the sleeve 22 are transmitted via the damping elements 25a, 25b and are thereby dampened.

[0033] The recesses 24a, 24b each have the same width B and depth T (for the definition of width B and depth T, see Figure 3 ). The damping elements 25a, 25b each have the same dimensions R1, R2 (for the definition of the dimensions R1, R2, see Figure 3 ). In another embodiment not shown, the recesses 24a, 24b have a different width B and / or a different depth T; and / or the damping elements 25a, 25b have a different dimension R1, R2.

[0034] Figure 2 shows a perspective view of a sleeve 22 of a braking device 10 according to an embodiment of the invention. The sleeve 22 will be described below with reference to Figure 1 described. In the Figure 2 In the embodiments shown, the bolt 21 is not shown.

[0035] As in Figure 2As can be seen, the recesses 24a, 24b extend essentially along the entire circumference of the inner surface 23 of the sleeve. This means that each of the recesses 24a, 24b is interrupted by the butt joint 30. The recesses 24a, 24b extend perpendicular to the cylinder axis Z.

[0036] In an embodiment not shown, the sleeve 22 can also have more than two recesses 24a, 24b. The distances between two adjacent recesses 24a, 24b can be adjusted according to the desired damping properties. For example, three recesses 24a, 24b can be provided in the sleeve 22, either equidistant or with pairs of different distances from each other.

[0037] Figure 3 shows a schematic representation of a section through a sleeve 22 of a braking device 11 according to an embodiment of the invention. The sleeve 22 is described with reference to Figures 1 and 2 described.

[0038] Figure 3describes the geometry of one of the recesses 24a, 24b. As an example, Figure 3 the recess 24a with the damping element 25a is shown. The one with reference to Figure 3 shown and described for the recess 24a and the damping element 25a can also apply to the other recess 24b and the other damping element 25b.

[0039] The recess 24a is provided in the inner surface 23 of the sleeve 22. The recess 24a is a depression that extends perpendicular to the cylinder axis Z into the inner surface 23 of the sleeve 22. The recess 24a has a depth T, where the depth T is the extension of the recess 24a perpendicular to the cylinder axis Z. The recess 24a has a width B, where the width B is the extension of the recess 24a along the cylinder axis Z.

[0040] The damping element 25a is arranged in the recess 24a. The damping element 25a is, for example, annular. The annular shape of the damping element 25a is described, for example, by two dimensions R1, R2. The damping element 25a has a first dimension R1, wherein the first dimension R1 is the extension of the damping element 25a perpendicular to the cylinder axis Z. The damping element 25a has a dimension R2, wherein the second dimension R2 is the extension of the damping element 25a along the cylinder axis Z.

[0041] The first dimension R1 of the damping element 25a is greater than the depth T of the recess 24a. Thus, the damping element 25a protrudes from the recess 24a. This allows the bolt 21 to be supported on the damping element 25a. The second dimension R2 of the damping element 25a is matched to the width B of the recess 24a such that the damping element 25a is reliably held in the recess 24a.

[0042] Figure 4 shows a schematic representation of a vehicle 100a, in particular commercial vehicle 100b, according to an embodiment of the invention.

[0043] The vehicle 100a, in particular commercial vehicle 100b, comprises a braking device 10 as described with reference to Figures 1 to 3 described. The braking device 10 meets noise emission requirements, for example, when used in a bus. The braking device 10 is optionally a pneumatic braking device 10. In In other embodiments, the braking device 10 is a hydraulic, a mechanically actuated and / or an electrically actuated braking device 10. Reference symbol (part of the description)

[0044] 10 Brake device 20 Bolt guide 21 Bolt 22 Sleeve 23 Inner surface 24a Recess 24b Recess 25a Damping element 25b Damping element 26 Hollow cylindrical section 27 Brake caliper 28 Brake carrier 29 Bolt seal 30 Butt joint 31 Clamping element 32 Outer surface of the bolt 33 Outer surface of the sleeve 34 Bore 100aVehicle 100bCommercial vehicle A Axis B Width R1 First dimension R2 Second dimension T Depth Z Cylinder axis

Claims

1. Braking device (10) for a vehicle (100a), in particular for a commercial vehicle (100b), comprising - a brake caliper (27), a brake carrier (28) and a bolt guide (20) comprising a bolt (21) extending along an axis (A), - the bolt guide (20) being designed and arranged to support the brake caliper (27) in a displaceable manner along the axis (A) relative to the brake carrier (28), - the bolt guide (20) having a sleeve (22) comprising an inner surface (23) and comprising an at least partially hollow-cylindrical portion (26), - the sleeve (22) having a plurality of circumferential recesses (24a, 24b) on the inner surface (23), characterized in that - the bolt guide (20) has a damping element (25a, 25b) arranged in each of the recesses (24a, 24b), and the damping elements (25, 25a) protruding radially inward from the recesses (24a, 24b) in the direction of the bolt 21, relative to the cylinder axis Z.

2. Braking device according to claim 1, wherein - the recess (24a, 24b) runs along the entire circumference and / or the recess (24a, 24b) is interrupted by a butt joint (30).

3. Braking device according to either of the preceding claims, wherein - the recess (24a, 24b) is rotationally symmetrical about a cylinder axis (Z) of the sleeve (22).

4. Braking device according to claim 1, wherein - the damping element (25a, 25b) is ring-shaped.

5. Braking device according to claim 4, wherein - the damping element (25a, 25b) is o-ring-shaped.

6. Braking device according to claim 1 or 2 or 3, wherein - a plurality of the recesses (24a, 24b) each have a same width (B) and depth (T), a different width (B) to one another and / or a different depth (T) to one another.

7. Braking device according to claim 1, wherein - the bolt guide (20) has a plurality of damping elements (25a, 25b) arranged in a relevant recess (24a, 24b), and wherein - a plurality of the damping elements (25a, 25b) have a same dimension (R1, R2) and / or a different dimension (R1, R2) to one another.

8. Vehicle (100a), in particular a commercial vehicle (100b), comprising a braking device (10) according to any of the preceding claims.