Brake pad for a friction brake

Abstract

The invention relates to a brake pad (10) for a friction brake (100), having at least one brake pad (12), a carrier component (14) which carries the brake pad (12), and a brake particle filter (16) for brake particles (P) released during a braking operation, wherein the brake particle filter (16) projects laterally beyond the carrier component (14).

Description

[0001] The invention relates to a brake pad for a friction brake, comprising at least one brake pad, a carrier component which carries the brake pad, and a brake particle filter for brake particles released during a braking operation.

[0002] Furthermore, the invention relates to a disc brake with a brake disc that can be connected to a wheel or wheel set and a brake carrier to which a brake calliper is fastened, wherein the brake calliper comprises at least one brake pad and at least one brake piston.

[0003] Furthermore, the invention relates to a method for replacing a brake pad of a friction brake, comprising the steps of: dismantling the installed brake pad from the friction brake and mounting a new brake pad in the friction brake.

[0004] During motor vehicle operation, brake wear occurs between the brake pads and the brake disc, which is usually released in the form of brake particles. Passive brake particle filters are known in the art.

[0005] From the publication JPH11311272A, a braking system is known in which filter elements for collecting brake dust are arranged on the sides of the brake pads. In this case, the filter elements are completely aligned with a support component of the brake block, so that the size of the filter elements is limited by the size of the support component and the size of the brake pad located on the support component. Thus, the filter elements have a comparatively small filtering surface.

[0006] WO 2011 / 034431 A1 discloses a braking system in which an additional dust collection chamber is mounted on the brake caliper. The dust collection chamber is equipped with replaceable filter elements. CN 21829427 7U describes a brake pad with dust extraction openings and a filter screen located behind them.

[0007] Passive brake particulate filters must be replaced regularly to maintain filter performance. Furthermore, certain countries may require compliance with brake particulate emission limits in the future. In this case, it is important to ensure that a brake particulate filter is replaced regularly.

[0008] With a passive filter, this can currently only be ensured with additional sensors that, for example, prevent the vehicle from restarting as soon as the particle absorption capacity decreases.

[0009] The object of the invention is therefore to increase the particle absorption capacity of brake pads with integrated brake particle filters.

[0010] The object is achieved by a brake pad of the type mentioned at the outset, wherein the brake particle filter of the brake pad according to the invention projects laterally beyond the carrier component.

[0011] Because the brake particulate filter extends laterally beyond the support component, a brake particulate filter with a comparatively large surface area suitable for absorbing brake particles can be used. This ensures that the brake particulate filter can capture a significant portion of the brake particles generated during braking.

[0012] The brake pad comprises a brake lining, which, during braking, comes into contact with a moving part, such as a brake disc of a friction brake. The resulting friction creates a braking effect, and brake particles are formed due to abrasion.

[0013] Preferably, the brake particle filter is matched to the brake pad to ensure that the brake particle filter is suitable for absorbing the resulting brake particles.

[0014] Because the brake particulate filter extends laterally beyond the support component, there is a section in which the brake particulate filter and the support component do not overlap. Consequently, the brake particulate filter may have one or more overlapping sections and one or more overlapping sections. In the one or more overlapping sections, the brake particulate filter and the support component overlap. In the one or more overlapping sections, the brake particulate filter and the support component do not overlap.

[0015] The brake particle filter can be corrosion-resistant, at least in some areas. The brake particle filter can be coated, in particular painted, at least in some areas. The brake particle filter can have a protective coating, in particular a corrosion protection coating and / or a thermal protection coating.

[0016] The brake particle filter extends, at least in sections, substantially parallel to the brake pad and / or the carrier component. Furthermore, the brake particle filter projects beyond the carrier component and / or the brake pad on one or more sides and / or in one or more directions. The brake particle filter projects laterally beyond the carrier component and / or the brake pad, at least in sections, and projects laterally beyond the carrier component, preferably beyond an edge of the carrier component and / or an edge of the brake pad.

[0017] To ensure high particle absorption capacity for brake particles, it is advantageous for the brake particle filter to extend laterally beyond the carrier component by a distance of at least 5 cm beyond the carrier component. It is also advantageous for the brake particle filter to extend laterally beyond the brake pad, preferably by a distance of at least 5 cm beyond the pad. The distance of at least 5 cm beyond the carrier component ensures that a significant proportion of the brake particles generated during braking can be absorbed by the brake particle filter. Appropriate brake particle filters ensure that brake particles generated in an edge region of the friction brake are also absorbed by the brake particle filter. The brake particle filter preferably extends over more than 10 cm, particularly preferably over more than 20 cm.The brake particle filter preferably extends over an angular range of at least 10°, preferably over an angular range of at least 20°, along the circumferential direction, in particular along the running direction of the friction brake.

[0018] The support component can, for example, be a support plate and / or have a grid structure. Mounting sections for mounting the brake pad to a brake pad receptacle of the friction brake can be located on the support component.

[0019] In an advantageous development of the brake pad according to the invention, the brake particle filter is connected to the carrier component and / or the at least one brake pad in such a way that detachment of the brake particle filter from the carrier component and / or the at least one brake pad leads to damage or destruction of the brake pad. Such damage or destruction makes the brake pad unsuitable for braking or at least results in a loss of braking effect. The brake pad must be replaced or renewed regularly. The fact that the brake pad encloses the brake particle filter and that detachment of the brake particle filter from the carrier component and / or the at least one brake pad can only occur with damage ensures that the brake particle filter is also replaced or renewed regularly. Furthermore, maintenance costs are reduced because the brake pad and the brake particle filter do not have to be replaced or renewed separately.must be replaced. The brake pad is, for example, glued or riveted to the carrier component.

[0020] In a preferred development of the brake pad according to the invention, the brake particle filter is connected to the carrier component and / or the at least one brake pad in a materially bonded and / or positively bonded and / or force-locked manner. The materially bonded connection between the brake particle filter on the one hand and the carrier component and / or the at least one brake pad on the other hand can be a welded connection and / or soldered connection and / or adhesive connection. The positively bonded connection between the brake particle filter on the one hand and the carrier component and / or the at least one brake pad on the other hand can be a pin connection and / or bolt connection. The force-locked connection between the brake particle filter on the one hand and the carrier component and / or the at least one brake pad on the other hand can be a rivet connection and / or screw connection and / or shrink connection and / or clamp connection and / or press connection.

[0021] In a further development of the brake pad according to the invention, the brake particle filter is glued and / or riveted and / or welded. The brake particle filter is preferably glued and / or riveted and / or welded to the carrier component and / or the at least one brake pad over a large area and / or via points, in particular via spaced-apart points. Furthermore, the brake particle filter can be riveted and / or sintered. The brake particle filter is preferably riveted and / or sintered to the carrier component and / or the at least one brake pad.

[0022] The brake pad according to the invention is further advantageously developed in that the brake particle filter is connected to the carrier component and / or the at least one brake pad via one or more point-like joints and / or via one or more linear joints. The joints can be riveted joints and / or screwed joints and / or welded joints and / or soldered joints and / or adhesive joints. The use of a point-like joint between the brake particle filter, on the one hand, and the carrier component and / or the at least one brake pad, on the other hand, leads to a reduction in material usage and a reduction in costs.The linear joint between the brake particle filter on the one hand and the carrier component and / or the at least one brake pad on the other hand can seal the contact surface between the brake particle filter and the carrier component in such a way that the brake particles produced during braking cannot pass through this contact surface.

[0023] The brake particle filter preferably extends in the circumferential direction, in particular in the running direction of a brake disc. The brake particle filter can run in front of and / or behind the carrier component and / or the at least one brake pad in the running direction of a brake disc. Furthermore, the brake particle filter can also be designed in multiple parts, with a first part running in front of the carrier component and / or the at least one brake pad in the running direction, and a second part running behind the carrier component and / or the at least one brake pad.

[0024] In a further advantageous development, the brake particle filter is embedded in the carrier component and / or in the brake pad or arranged between the carrier component and the brake pad. Embedding the brake particle filter in the carrier component and / or in the brake pad or arranging the brake particle filter between the carrier component and the brake pad leads to a reduction in costs, since no subsequent connection of the brake particle filter to the carrier component and / or the brake pad is necessary. The brake particle filter is preferably embedded in the carrier component and / or the brake pad in such a way that the brake particle filter is enclosed by the carrier component and / or the brake pad. The brake particle filter is preferably designed such that it absorbs brake particles generated during braking throughout the entire life cycle of the brake pad.

[0025] In a further preferred embodiment of the brake pad according to the invention, the brake particle filter has a particle absorption capacity that allows the absorption of at least 25 percent of the brake particle quantity that can be generated from the brake pad. Furthermore, the brake particle filter has a particle absorption capacity that allows the absorption of preferably at least 40 percent, particularly preferably at least 50 percent, of the brake particles that can be generated from the brake pad. The highest possible particle absorption capacity of the brake particle filter is expedient in order to minimize the impact on humans and the environment and to comply with emission control guidelines, particularly those related to road traffic.

[0026] In a further preferred embodiment of the brake pad, the brake particle filter comprises a fiber structure and / or filter wool. The fiber structure and / or the filter wool are preferably temperature-resistant, at least up to a temperature of 250° Celsius, preferably up to a temperature of 500° Celsius, in order not to be damaged and / or destroyed and / or altered in their structure and / or functionality at the temperatures generated during braking. Furthermore, the fiber structure and / or the filter wool are preferably designed to be corrosion-resistant. The fiber structure and / or the filter wool can comprise crimped and / or random fibers and / or a fleece. The fiber structure and / or the filter wool can comprise metal fibers, in particular stainless steel fibers. The filter wool can be designed as steel wool and / or metal wool.The brake particulate filter may comprise multiple filter zones, with the properties of the fiber structure and / or the filter wool differing from each other in the respective filter zones. The brake particulate filter may comprise a mesh structure.

[0027] In an advantageous development of the brake pad according to the invention, the brake particle filter comprises a carrier element for the fiber structure and / or the filter wool. The carrier element is preferably temperature-resistant, at least up to a temperature of 250° Celsius, preferably up to a temperature of 500° Celsius. The carrier element is preferably corrosion-resistant. The carrier element can have a grid structure and / or be designed as a metal grid. The carrier element can be formed in one piece and / or from metal and / or plastic and / or ceramic and / or a composite material. The carrier element can be made of sheet metal.

[0028] Furthermore, a brake pad according to the invention is preferred in which the brake particle filter has a deformation region which can be deformed non-destructively to enable changes in the relative position between a fastening region of the brake particle filter on the brake pad and a fastening region of the brake particle filter beyond the brake pad.

[0029] Due to wear of the brake pad, the relative position between a fastening region of the brake particle filter on the brake pad and a fastening region of the brake particle filter beyond the brake pad changes during use of the brake pad. Furthermore, a deformation region of the brake particle filter can be expedient to simplify the assembly and / or disassembly of the brake pad. In the deformation region, the brake particle filter can be flexibly and / or elastically deformable. The deformation region can be a kink region and / or comprise at least one kink point. The brake particle filter can have a wave shape in the deformation region. The wave shape can be formed by multiple kinking and / or multiple bending of the material of the brake particle filter in the deformation region. The deformation region can have a pre-embossed portion that allows non-destructive deformation.The material thickness can be locally reduced in the deformation area. The carrier element of the brake particle filter can be modified or omitted in the deformation area. The deformation area can extend over at least 0.6 cm, preferably at least 0.8 cm, and / or more preferably over at least 1.2 times the maximum thickness of the brake pad.

[0030] Furthermore, a brake pad according to the invention is preferred in which the brake particle filter has a fastening region for fastening the brake particle filter beyond the brake pad. The brake particle filter can be fastened, for example, to a filter housing via the fastening region. Furthermore, one or more fastening recesses can be located in the fastening region. The fastening region can be designed as a fastening tab and / or allow fastening by clamping and / or screwing. The fastening region can be a contact region which, in the fastened state, is designed to bear against an inner wall of the filter housing.

[0031] The object underlying the invention is further achieved by a disc brake of the type mentioned above, wherein the brake pad of the disc brake according to the invention is designed according to one of the embodiments described above. Regarding the advantages and modifications of the disc brake according to the invention, reference is first made to the advantages and modifications of the brake pad according to the invention.

[0032] The disc brake may include a wear indicator for the brake pad lining of the brake pad and / or a contamination indicator for the brake particulate filter of the brake pad.

[0033] In a further preferred embodiment, the disc brake comprises a filter housing to which the brake particle filter is fastened beyond the brake pad. Because the brake pad comprises the brake particle filter and the brake pad, the gap between the brake pad and the filter housing can be closed by the brake particle filter. This prevents brake particles from escaping from the gap without passing through the brake particle filter. The support component and the filter housing can be designed as a single piece. This reduces interfaces and assembly effort. The filter housing can be made as a single piece and / or from metal and / or plastic and / or ceramic and / or a composite material. The filter housing can be designed to be temperature-resistant so that the filter housing is resistant to the temperatures generated during braking.The filter housing may contain mounting sections for mounting the brake particulate filter. The brake particulate filter is, for example, glued, riveted, and / or screwed to the filter housing.

[0034] The object underlying the invention is further achieved by a method of the type mentioned at the outset, wherein the installed brake pad and the new brake pad each comprise at least one brake lining and a brake particle filter for brake particles released during braking, such that the brake particle filter is replaced by dismantling the installed brake pad and installing the new brake pad. After prolonged use, brake particle filters lose their particle absorption capacity for the brake particles generated during braking. Conventional brake particle filters are replaced independently of the brake pad and / or brake pad. The fact that the brake lining and the brake particle filter are replaced together in the method according to the invention guarantees that the current brake particle filter has a sufficiently high particle absorption capacity for the brake particles generated during braking.By replacing the brake pad and the brake particulate filter at the same time, maintenance effort is also reduced.

[0035] In a preferred embodiment of the method according to the invention, the installed brake pad and / or the new brake pad is designed according to one of the embodiments described above. Regarding the advantages and modifications of the method according to the invention, reference is made to the advantages and modifications of the brake pad according to the invention.

[0036] Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. Fig. 1 shows an embodiment of the disc brake according to the invention in a schematic sectional view; and Fig. 2 shows a further embodiment of the disc brake according to the invention in a schematic perspective view.

[0037] The Fig. 1 shows a disc brake 100 which can be used in a motor vehicle.

[0038] The disc brake 100 has a brake disc 102 and a filter housing 104. The filter housing 104 is arranged next to the brake disc 102. A brake pad 10 is arranged within the filter housing 104. On the side of the brake pad 10 facing away from the brake disc 102, the filter housing 104 has a wall 108 that runs parallel to the brake disc 102. The lateral walls 110a, 110b of the filter housing 104 run perpendicular to the brake disc 102.

[0039] The brake pad 10 comprises a brake lining 12, a carrier component 14 and a brake particle filter 16.

[0040] The brake pad 12 is a semi-metallic brake pad 12 made of metal, graphite, a binder, and fillers. Such a semi-metallic brake pad 12 is cost-effective and has a long service life.

[0041] The carrier component 14 is made of metal and is responsible for guiding the brake pad 10 in the brake caliper 106 and dissipating the heat generated during braking to neighboring components. The carrier plate 10 is powder-coated to protect against corrosion. The brake pad 12 can be bonded to the carrier plate 14 by means of an adhesive bond and / or a force-fit connection by means of a riveted joint.

[0042] The brake particle filter 16 can comprise a fiber structure and / or filter wool and absorbs a significant portion of the brake particles P generated during braking.

[0043] The brake particle filter 16 projects laterally beyond the brake pad 12 and the carrier component 14. The brake particle filter 16 projects beyond the brake pad 12 by a brake pad projection distance y1 of more than 5 cm. Furthermore, the brake particle filter 16 projects beyond the carrier component 14 by a carrier component projection distance y2 of more than 5 cm. Since the brake pad 12 and the carrier component 14 are completely overlapping, the brake pad projection distance y1 corresponds to the carrier component projection distance y2.

[0044] The brake particle filter 16 further has two fastening areas 20a, 20b. The brake particle filter 16 is connected to the support component 14 via the fastening area 20a. The brake particle filter 16 is connected to the inner surface of the wall 108 of the filter housing 104 via the fastening area 20b beyond the brake pad 12 and beyond the support component 14. The fastening area 20b is a contact area that rests against the inner surface of the wall 108 of the filter housing 104.

[0045] The brake particle filter 16 runs in the fastening area 20b parallel to the wall 108 of the filter housing 104 and to the brake disc 102. The fastening area 20a is glued to the carrier component 14. The brake particle filter 16 has a deformation area 18 between the fastening areas 20a, 20b. The deformation area 18 of the brake particle filter 16 runs obliquely to the fastening areas 20a, 20b. The brake pad 12 and the carrier component 14 run parallel to the wall 108 of the filter housing 104 and to the brake disc 102.

[0046] During the braking process, brake particles P are created at the contact surface 24 between the brake disc 102 and the brake pad 12, which spread in the direction of the brake particle filter 16.

[0047] The brake particles P are captured by the brake particle filter 16. The brake particles P adhere to the brake particle filter 16. The brake particle filter 16 consists of a fiber structure and / or filter wool. The brake particle filter 16 absorbs the brake particles P until the brake particle filter 16 has reached its particle absorption capacity.

[0048] When the particle absorption capacity of the brake particle filter 16 is reached, the installed brake pad 10 is removed and a new brake pad 10 is mounted in the brake calliper 106.

[0049] The Fig. 2 shows another embodiment of a disc brake 100 which can be used in a motor vehicle.

[0050] The disc brake 100 comprises a brake caliper 106 and a brake disc 102. The brake caliper 106 is arranged in a saddle-like manner over a portion of the brake disc 102 located on a wheel bearing and conceals this portion. In this concealed portion, the brake pad 10 is connected to the brake caliper 106.

[0051] The brake pad 10 comprises a brake lining 12, a carrier component 14 and a brake particle filter 16.

[0052] The brake particle filter 16 can comprise a fiber structure and / or filter wool and absorbs a significant portion of the brake particles P generated during braking. The brake particle filter 16 has a region 22a located in front of the brake caliper 106 in the direction of travel of the brake disc 102, in which region it projects beyond the brake caliper 106 and conceals a portion of the brake disc 102 located outside the brake caliper 106. The brake particle filter 16 has a region 22b located behind the brake caliper 106 in the direction of travel of the brake disc 102, in which region it projects beyond the brake caliper 106 and conceals a portion of the brake disc 102 located outside the brake caliper 106. Reference symbol 10 brake pad 12 brake pad 14 Support component 16 brake particle filters 18 Deformation area 20a, 20b Fastening areas 22a, 22b Areas of the particle filter 24 contact surface 100 Friction brake or disc brake 102 brake disc 104 filter housings 106 brake caliper 108 wall 110a, 110b walls P brake particles y1 brake pad transfer section y2 beam component transmission distance QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JPH11311272A

[0005] WO 2011 / 034431 A1

[0006] CN 21829427 7U

[0006]

Claims

[1] Brake pad (10) for a friction brake (100), with - at least one brake pad (12); - a carrier component (14) which carries the brake pad (12); and - a brake particle filter (16) for brake particles (P) released during braking; characterized by that the brake particle filter (16) projects laterally beyond the carrier component (14). [2] Brake pad (10) according to claim 1, characterized by that the brake particle filter (16) is connected to the carrier component (14) and / or the at least one brake pad (12) in such a way that detachment of the brake particle filter (16) from the carrier component (14) and / or the at least one brake pad (12) leads to damage or destruction of the brake pad (10). [3] Brake pad (10) according to claim 1 or 2, characterized bythat the brake particle filter (16) is connected in a materially and / or positively and / or non-positively manner to the carrier component (14) and / or the at least one brake pad (12). [4] Brake pad (10) according to one of the preceding claims, characterized by that the brake particle filter (16) is glued and / or riveted and / or welded. [5] Brake pad (10) according to one of the preceding claims, characterized by that the brake particle filter (16) is connected to the carrier component (14) and / or the at least one brake pad (12) via one or more point-shaped joining connections and / or via one or more linear joining connections. [6] Brake pad (10) according to one of the preceding claims, characterized by that the brake particle filter (16) is embedded in the carrier component (14) and / or in the brake pad (12) or is arranged between the carrier component (14) and the brake pad (12). [7] Brake pad (10) according to one of the preceding claims, characterized by that the brake particle filter (16) has a particle absorption capacity which allows the absorption of at least 25 percent of the amount of brake particles that can be generated from the brake pad (12). [8] Brake pad (10) according to one of the preceding claims, characterized by that the brake particle filter (16) comprises a fiber structure and / or filter wool. [9] Brake pad (10) according to claim 8, characterized by that the brake particle filter (16) comprises a carrier element for the fiber structure and / or the filter wool. [10] Brake pad (10) according to one of the preceding claims, characterized byin that the brake particle filter (16) has a deformation region (18) which can be deformed non-destructively to enable changes in the relative position between a fastening region (20a) of the brake particle filter (16) on the brake pad (10) and a fastening region (20b) of the brake particle filter (16) beyond the brake pad (10). [11] Brake pad (10) according to one of the preceding claims, characterized by that the brake particle filter (16) has a fastening area (20b) for fastening the brake particle filter (16) beyond the brake pad (10). [12] Disc brake (100), with - a brake disc (102) connectable to a wheel or wheel set; and - a brake carrier to which a brake caliper (106) is fastened, wherein the brake caliper (106) comprises at least one brake pad (10) and at least one brake piston; characterized bythat the brake pad (10) of the brake calliper (106) is designed according to one of the preceding claims. [13] Disc brake (100) according to claim 12, characterized by a filter housing (104) to which the brake particle filter (16) is attached beyond the brake pad (10). [14] Method for replacing a brake pad (10) of a friction brake (100), comprising the steps: - Dismantling the installed brake pad (10) from the friction brake (100); and - Mounting a new brake pad (10) in the friction brake (100); characterized by that the installed brake pad (10) and the new brake pad (10) each comprise at least one brake lining (12) and a brake particle filter (16) for brake particles (P) released during a braking operation, so that the brake particle filter (16) is replaced by dismantling the installed brake pad (10) and fitting the new brake pad (10). [15] Method according to claim 14, characterized by that the installed brake pad (10) and / or the new brake pad (10) is designed according to one of claims 1 to 11.

Images