Brake dust particle filter, disc brake assembly and filter insert

Abstract

The present invention relates to a brake dust particle filter (10) for a disc brake assembly (100) with a brake disc (101) and a brake caliper (102), wherein the brake dust particle filter (10) is designed to capture particles generated during braking and wherein the brake dust particle filter (10) comprises the following: - a ring-segment-shaped housing (1) for at least partially receiving the brake disc (101) in a housing interior (11), wherein the housing (1) has two axially spaced housing side walls (12, 13) and a housing circumferential wall section (14) extending radially outwards in the circumferential direction, and wherein the housing circumferential wall section (14) is arranged or formed between the housing side walls (12, 13); - at least one guide rib (15) projecting inwards in the interior of the housing (11) at least partially with at least one axial component of at least one housing side wall (12, 13), wherein the guide rib (15) is arranged adjacent to at least one opening (17) in the housing side wall (12, 13) and the guide rib (15) is at least partially covered with a filter medium (16). The invention further relates to a disc brake assembly (100) and a filter element (2) of the brake dust particle filter (10).

Description

[0001] The invention relates to a brake dust filter for a disc brake assembly comprising a brake disc and a brake caliper. The brake dust particle filter is designed to capture particles generated during braking. The invention further relates to a disc brake assembly with such a brake dust particle filter and a filter element of a brake dust particle filter. Technical field

[0002] It is known to capture and dispose of particles generated by brake abrasion using a brake dust particle filter. Such particles are produced by friction between the brake pad and the brake disc of a disc brake. A brake dust particle filter of this type is known, for example, from DE 10 2019 105 862 A1. To increase the surface area available for filtration, a filter medium in the form of tongues or folds is provided on the housing's circumferential wall inside the housing.

[0003] However, a disadvantage of this is that a circumferential flow (boundary layer) caused by the rotation of the brake disc during operation creates a relative overpressure in the housing of the brake dust particle filter, which means that some of the particles to be separated do not remain in the brake dust particle filter, but leave it again through leakage at the interfaces with the brake caliper and / or brake disc.

[0004] From DE 39 34 422 A1 a container for receiving brake dust is known, which comprises a housing for gripping a part of the brake disc and a filter which is multi-layered and contains means for introducing the air carrying the brake abrasion. Disclosure of the invention

[0005] In contrast, the object of the present invention is to provide a brake dust particle filter that is designed more efficiently for separating particles generated during braking and, in particular, has a reduced internal pressure during operation.

[0006] The object of the present invention is further to provide a disc brake arrangement with such a brake dust particle filter.

[0007] The object of the present invention is further to provide a filter insert part of a brake dust particle filter which enables simple and uncomplicated servicing.

[0008] The brake dust particle filter according to the invention is suitable for any disc brake application, both mobile and stationary. In mobile applications, it can be used, for example, in cars, trucks, buses, and rail vehicles. In stationary applications, it can be used, for example, in shaft brakes such as those used in wind turbines.

[0009] This problem is solved by a brake dust particle filter according to claim 1, a disc brake assembly according to claim 20, and a filter element according to claim 22. The dependent claims describe preferred embodiments.

[0010] The brake dust particle filter according to the invention is designed for a disc brake assembly with a brake disc and a brake caliper and is designed to capture particles generated during braking. The brake dust particle filter has an annular segment-shaped housing for at least partially accommodating the brake disc within a housing interior, wherein the housing has two axially spaced housing side walls and a housing circumferential wall section extending radially outwards in the circumferential direction. The housing circumferential wall section is arranged or formed between the housing side walls. Furthermore, the brake dust particle filter has at least one guide rib projecting inwards within the housing interior, at least partially, with at least one axial component extending from at least one housing side wall.The guide rib is located adjacent to at least one opening in the side wall of the housing and is at least partially covered with a filter medium.

[0011] The term "housing side wall" refers to a wall of the housing that, in a mounting arrangement of the brake dust particle filter, runs normal to an axis of rotation of the brake disc or parallel to a friction surface of the brake disc.

[0012] The combination according to the invention of a guide rib projecting from the housing side wall into the interior with at least one axial component, and the adjacent opening in the housing side wall, advantageously reduces the internal pressure of the brake dust particle filter during operation. The guide rib located in the housing interior, together with the corresponding opening, acts as a "vent gill." A circumferential flow carried along with the rotation of the brake disc due to boundary layer effects can escape through the opening in the housing side wall of the brake dust particle filter according to the invention, whereby the particle-laden airflow is guided past or through the filter medium. Due to the significantly reduced internal pressure during operation, the overall separation efficiency of the system increases because fewer gap losses occur.Furthermore, the brake dust particle filter according to the invention also allows the effects on the housing internal pressure resulting from internal ventilation of the brake disc to be regulated.

[0013] Particularly advantageous is the ability of the guide ribs to be inclined relative to a plane of the housing side wall, so that the circumferential flow described above can be optimally "captured" and redirected through the opening.

[0014] The desired effect according to the invention is based on a functional combination of the opening in the side wall with the adjacent guide rib, which is at least partially covered with filter medium. The device components alone do not explicitly produce the desired effect.

[0015] The opening can, in particular, have a rectangular or parallelogram shape.

[0016] The ring-segment-shaped housing preferably covers a large angular range of the brake disc to achieve a high filtration efficiency. The housing preferably extends over a ring segment angle of more than 35°, particularly more than 55°, and most preferably more than 75°. Selecting a suitable angle of coverage involves resolving a conflict between the proportion of particles to be filtered and the cooling capacity available to the disc brake.

[0017] To facilitate assembly, the housing can comprise a first and a second housing part. The two housing parts are preferably arranged at least partially axially on both sides of the brake disc. Particularly preferably, the first and second housing parts are reversibly and detachably connected. Alternatively, the two housing parts can also be permanently connected, for example, by welding. A holding device can be integrated into one of the housing parts, preferably the housing part located axially inside in a mounting arrangement, by means of which the brake dust particle filter can be connected in a relatively fixed position relative to a wheel carrier of a motor vehicle.

[0018] A screw connection, a clip connection, a folding mechanism and / or a swivel mechanism can be provided to connect the two housing parts.

[0019] In one embodiment of the invention, a housing part of the brake dust particle filter can be a splash guard element, in particular a splash guard plate, that at least partially covers the inside of the brake disc. This eliminates the need for an additional splash guard plate, thus saving weight, which, due to its location in the unsprung area of ​​a chassis, offers advantages in driving dynamics.

[0020] The filter medium can be attached to the guide rib directly or indirectly, e.g. by positive locking or by material locking, e.g. by welding.

[0021] The filter medium is preferably designed to be stable even at temperatures exceeding 600°C, enabling it to withstand the temperatures in the immediate vicinity of a disc brake. The filter medium can comprise a metal, a metal fiber fleece, glass, ceramic, and / or a high-temperature-resistant plastic, particularly polyetheretherketone. The housing should also advantageously possess sufficient temperature resistance; for this purpose, it can be made of sheet metal, preferably steel. In addition to its excellent temperature resistance, sheet steel offers the further advantage that the housing can be produced by a simple forming process, such as deep drawing. In some embodiments, at least one guide rib can be formed integrally with the housing side wall.Alternatively, it can be detachably or indetachably connected to the housing side wall, or it can be located on a separate component that is itself connected to the housing side wall, such as a filter insert.

[0022] According to a further embodiment, the filter medium can fill a gap between an end of the guide rib near the housing side wall and an opposite edge of the opening to at least 50%, preferably at least 75%. This could alternatively be described as a "coverage rate" (% of the opening's cross-sectional area). This can be achieved through a targeted selection of the gap width and the filtration-relevant parameters of the filter medium, in particular its air permeability (l / m²). 2s), the desired internal pressure-reducing effect can be adapted to the individual application. In some designs, it may also be explicitly stipulated that the filter medium fills 100% of the gap between one end of the guide rib near the housing side wall and an opposite edge of the opening, i.e., the opening is completely sealed by the filter medium.

[0023] In a preferred embodiment, the guide rib is located at least on the housing side wall that faces the outside of the vehicle in a mounting arrangement; this allows the airflow from the housing interior to be optimally directed into the environment. In other embodiments, at least one rib and at least one corresponding opening can also be located on the housing side wall that faces the inside of the vehicle in a mounting arrangement; this is referred to as a symmetrical configuration. The symmetrical configuration has the advantage that the internal housing pressure can be reduced even more effectively and that more filter area can be provided. However, this is not possible in every application due to installation space restrictions.

[0024] According to an equally preferred embodiment, a plurality of guide ribs can be distributed around the circumference of the side wall, each arranged adjacent to a corresponding opening, the guide ribs being at least partially covered with filter medium. This has the advantage that the internal housing pressure can be reduced even more effectively and that more filter area can be provided. The openings can be arranged parallel to one another, i.e., at least one boundary edge of the openings is parallel. Alternatively, the arrangement can also be such that the boundary edges of the openings each run radially, resulting in the circumferential arrangement. In embodiments, at least one guide rib, preferably all guide ribs, can be completely covered with filter medium.This advantageously results in ideal utilization of the available surface area of ​​the guide ribs for filtration purposes. Preferably, the guide rib can form an acute angle with the side wall, more preferably an angle in the range of 10° to 75°, and particularly preferably an angle in the range of 25° to 60°. By appropriately selecting the "angle of attack," the flow-guiding effect of the guide rib(s) can be specifically adapted to the flow conditions in the individual application. This allows the trade-off between reducing the internal pressure of the housing and achieving the desired filtration performance to be influenced. In a particularly preferred embodiment, the guide rib is angled in the opposite direction to a predetermined forward rotational direction of the brake disc in an assembly state.When positioned against the direction of rotation, the circumferential flow described above can be optimally deflected, thus reducing the internal housing pressure particularly effectively. In some designs, the guide rib extends axially as close as possible (i.e., as close as necessary while adhering to tolerance and safety requirements) to a friction surface of the brake disc in the assembled state. This has the advantageous effect that the brake dust particles, which are present in particularly high concentrations in the boundary layer flow, can be directed to the filtration system by deflecting the flow via the guide ribs. Alternatively or additionally, the guide rib can extend longitudinally in the radial or tangential direction.Furthermore, it can be provided that at least two of the guide ribs form an acute angle of different sizes with the housing side wall and / or extend axially from the housing side wall to different distances into the housing interior. These measures provide an important means of influencing the pressure conditions inside the housing, not only globally but also locally. For example, by appropriately selecting the angle and / or length of the respective guide ribs, a uniform pressure distribution can be achieved across the entire circumference of the housing, thus counteracting detrimental local pressure increases.

[0025] The guide rib can have a flat cross-sectional shape and comprise at least one base surface facing the housing's circumferential wall, a top surface projecting into the housing's interior, and at least one side surface, wherein at least one side surface is at least partially covered with the filter medium. In some embodiments, both side surfaces of the guide rib can be covered with filter medium. The base surface need not be a "free surface" but can be located directly on the housing's side wall, and in particular, the guide rib can be connected to the housing's circumferential wall via this base surface. Therefore, in some embodiments, the base surface is a hypothetical cross-sectional area.

[0026] In a preferred embodiment, the guide rib can have a substantially rectangular cross-section, wherein the ratio of a wide side to a narrow side of the rectangular cross-section is between 15 and 60, preferably between 20 and 40. Such values ​​can be achieved for a variety of brake dust particle filter sizes by using sheets of standard thicknesses to manufacture the at least one guide rib; for example, sheets with a thickness (= narrow side of the cross-section) between 0.5 and 4 mm can be used.

[0027] The guide rib is preferably designed to be fluid-impermeable or the guide rib has at least one passage recess that is covered by the filter medium.

[0028] However, it is not essential that the guide rib forms a continuous, uninterrupted body; it can also be slotted once or multiple times. In the case of such slotted guide ribs, the aforementioned ratios refer to an outer contour of the respective guide rib and not to the "partial ribs" formed by the slots.

[0029] In a further preferred embodiment, at least one additional guide rib, at least partially covered with filter medium and having at least one axial component, can project from the other housing side wall into the housing interior, wherein the additional guide rib is arranged adjacent to at least one further opening present in the other housing side wall. This embodiment further characterizes the “symmetrical configuration” described above.

[0030] In a particularly preferred embodiment, the at least one guide rib, at least partially covered with the filter medium, and the corresponding opening can be located in a filter insert part that is detachably coupled to the housing side wall. This has the advantage that servicing the brake dust particle filter (replacing the filter medium, cleaning if necessary) is very simple and convenient, since only the filter insert part needs to be separated from the housing for this purpose, and not the entire housing from the vehicle. In particular, the filter insert part can have a side wall section with which it is inserted into a corresponding opening in the housing side wall. In the assembled state, the side wall section of the filter insert part forms part of the housing side wall and contains the opening and the guide rib arranged thereon.

[0031] Furthermore, the housing can have a brake caliper connection area at a circumferential end region, which corresponds to the contour of a predetermined brake caliper. The brake caliper connection area is adapted to the geometry of a brake caliper in a specific application and is primarily designed to minimize gap losses at this point by reducing gap widths as much as possible. In some embodiments, the brake dust particle filter is mounted in a configuration such that it is positioned circumferentially behind the brake caliper in the direction of a predetermined forward rotation of the brake disc.

[0032] Furthermore, the housing can have an end wall at a circumferential end facing away from the brake caliper connection area. This end wall connects at least one of the housing side walls to the circumferential wall section and preferably extends parallel to an axis of rotation of a brake disc in the assembled state. In the assembly, the end wall effectively closes off the brake dust particle filter housing at an end furthest from the brake caliper. For this purpose, a receiving slot for the brake disc can be provided in the end wall, giving the end wall a substantially U-shaped form. The width of the receiving slot can be dimensioned with respect to the brake disc thickness such that the gap between a friction surface of the brake disc and an opposite edge of the end wall is as small as possible in the assembled state.

[0033] Preferably, the lengths of the guide ribs can increase circumferentially away from the brake caliper connection area, and / or the cross-sectional area of ​​the openings can increase circumferentially away from the brake caliper connection area. As explained above, this provides a means of influencing the pressure conditions inside the housing not only globally but also locally.

[0034] By appropriately designing the length of the respective guide ribs and / or the opening cross-sections of the corresponding openings, a uniform pressure distribution can be achieved over the entire circumference of the housing, thus counteracting adverse local pressure increases.

[0035] Since it has been recognized that housing sections of the brake dust particle filter, especially those near the brake caliper connection area, are affected by adverse local pressure increases, this reveals a particularly effective measure for equalizing the pressure conditions.

[0036] The housing can preferably be designed as a sheet metal construction, and the guide rib and the corresponding opening can preferably be formed as shaped parts. For example, the opening can first be punched out of a sheet metal part along three of its edges, and the guide rib is then formed by folding the partially punched-out area inwards. This is particularly cost-effective, as it requires only a few process steps and eliminates the need for complex joining processes.

[0037] Another aspect of the invention relates to a disc brake assembly comprising a brake disc, a brake caliper, and a brake dust particle filter according to the invention. The features and combinations of features disclosed with respect to the brake dust particle filter according to the invention, as well as their advantageous technical effects, are transferable to the disc brake assembly according to the invention and vice versa.

[0038] The brake dust particulate filter can be in a fixed position relative to the brake caliper, a wheel bearing housing, and / or a splash guard. Alternatively or additionally, the brake dust particulate filter can be attached to the brake caliper, a wheel bearing housing, and / or a splash guard, with attachment to the brake caliper being advantageous if it is a so-called fixed caliper. It is particularly advantageous if the brake dust particulate filter is connected to the wheel bearing housing at the same mounting points as the brake caliper. Furthermore, the bolts with which the brake caliper is bolted to the wheel bearing housing can have a blind hole thread, at least in the area of ​​one bolt head, so that the brake dust particulate filter can be connected to the bolts. This advantageously avoids affecting the safety-critical bolting of the brake caliper (holder) to the wheel bearing housing (settling / change in preload force).

[0039] In particular, the brake dust particle filter is arranged so that it is flush with the brake caliper in the circumferential direction of the housing, and is arranged downstream in the direction of rotation of the brake disc during intended forward driving.

[0040] To achieve particularly effective particle separation, the brake dust particle filter is preferably arranged directly adjacent to the brake caliper.

[0041] Finally, another aspect of the invention relates to a filter insert part of a brake dust particle filter according to the invention, wherein the filter insert part has at least one guide rib which is at least partially covered with the filter medium and is located adjacent to at least one opening, and is detachably coupled to a housing side wall of the brake dust particle filter.

[0042] The features and combinations of features disclosed with respect to the brake dust particle filter and the disc brake arrangement according to the invention, as well as their advantageous technical effects, are transferable to the filter insert part according to the invention and vice versa.

[0043] Further features and advantages of the invention will become apparent from the following description of several exemplary embodiments of the invention, from the claims, and from the figures, which show essential details of the invention. The features shown in the figures are presented in such a way that the inventive features are clearly visible. The various features can be implemented individually or in any combination in variants of the invention and are therefore combinable with one another. Description of the drawings

[0044] The drawing shows: Fig. 1 a top view of the disc brake arrangement according to the invention in a first embodiment; Fig. 2 Section AA according to Fig. 1; Fig. 3 an isometric view of the brake dust particle filter according to the invention with the filter medium hidden according to a first embodiment; Fig. 4 an isometric view of the brake dust particle filter according to the invention with the filter medium hidden according to a second embodiment; Fig. 5 a top view of the disc brake arrangement according to the invention in a second embodiment; Fig. 6 Section BB according to Fig. 5; Fig. 7 an isometric view of the brake dust particle filter according to the invention with filter medium according to the first embodiment; Fig. 8 an isometric view of a filter insert part according to the invention. Embodiments of the invention

[0045] Fig. Figure 1 shows a top view of a disc brake assembly 100 according to the invention, which comprises a brake disc 101, a brake caliper 102, and a brake dust particle filter 10. The brake dust particle filter 10 is arranged downstream of the brake caliper 102 in a predetermined forward rotational direction V, so that it can capture brake dust particles that arise in the frictional contact between the brake pads (not shown) of the brake caliper 102 and the brake disc 101. The brake dust particle filter 10 has a housing 1, which is designed in the shape of an annular segment, namely a circular segment, and which surrounds the brake disc 101 over a certain angular range, thereby enclosing it axially on both sides and radially on the outside.At its circumferential end region near the brake caliper 102, the housing 1 has a brake caliper connection area 19, which is adapted to a contour of the brake caliper 102 at the interface in order to keep gap widths as small as possible and thereby minimize gap losses. The housing 1 has two axially spaced housing side walls 12, 13, between which the brake disc 101 is accommodated, and has a housing circumferential wall section 14 extending radially outwards in the circumferential direction, which is arranged or formed between the housing side walls 12, 13. It can therefore be said that the housing circumferential wall section 14 at least partially delimits the housing in the radial direction.

[0046] The housing 1 is mounted in a relatively fixed position relative to the brake caliper 102; in particular, it can be attached to a wheel carrier, a strut, a splash guard or similar device components of a vehicle.

[0047] The side wall 12 of the housing has a plurality of openings 17, which are spaced apart from each other in the circumferential direction and which connect the surroundings to an interior space 11 enclosed by the housing 1 (see, among others, the figure shown). Fig. 2) connect. The openings 17 are rectangular or parallelogram-shaped and are each aligned parallel to each other. In other embodiments not shown, however, they can have any other shape that appears suitable to a person skilled in the art; the invention is not limited to a specific shape of the openings 17. Guide ribs 15 extend from the housing side wall 12 into the interior 11 of the housing, adjacent to each of the openings 17, the guide ribs being covered with a filter medium 16 according to the invention (see inter alia). Fig. 5 ff). The filter medium 16 is designed to improve the visibility of the formation of the guide ribs in Fig. Numbers 1 to 4 are hidden.

[0048] The openings 17 and a longitudinal extension of the guide ribs 15 arranged thereon run in radial direction R or tangential direction T (depending on which rib is considered).

[0049] During operation, the brake dust particle filter 10, in its installed state within a disc brake assembly 100, uses the openings and guide ribs to create pressure equalization between the interior 11 and the environment. Without pressure equalization measures, a relative overpressure would be generated in the housing 1 due to boundary layer effects resulting from the rotation of the brake disc. This would lead to significant gap losses (e.g., at the interface with the brake caliper and relative to the brake disc). However, the brake dust particle filter according to the invention not only provides pressure equalization within the housing but also utilizes the ventilation for particle separation simultaneously, due to the at least partial coverage of the guide ribs 15 with filter medium.The filter medium can, in some configurations, completely cover the cross-section of the openings 17, allowing pure flow through the filter medium, or alternatively, cover at least 50% of the cross-section of the openings 17, resulting in a combination of overflow and flow through the filter medium. The thickness of the filter medium can be adjusted accordingly, and this can also be used to achieve a volume flow distribution among the openings 17. The guide ribs 15 can, in particular, be formed integrally with the housing side wall 12 and produced, for example, in a forming process (punching the openings 17 and folding the guide ribs 15 inwards). In other configurations, however, they can also be joined to the housing side wall 12, for example, by welding.

[0050] According to the embodiment shown, the openings 17 and the guide ribs 15 arranged thereon are located on a filter insert part 2 which is detachably inserted into the housing side wall 12, which enables a simple replacement of the filter medium in the event of service (loaded filter medium) without having to detach the entire filter housing 1 from the vehicle.

[0051] The brake dust particle filter 10 shown here further comprises a circumferential filter insert 3 containing additional filter medium. However, the present invention is explicitly not limited to a combination with a circumferential filter insert 3, but encompasses any brake dust particle filter 10 regardless of the design of its housing circumferential wall section 14, which may also be completely closed. In preferred embodiments, however, the housing circumferential wall section 14 is also at least partially air-permeable and comprises a filter medium that covers at least one opening of the housing circumferential wall section 14.

[0052] In the side view of section AA of the Fig. 1, which in Fig. Figure 2 shows the "internal workings" of the brake dust particle filter 10 in detail. The brake disc 101 is an internally ventilated brake disc 101, which has internal ventilation channels 101' through which an airflow can be conveyed radially outwards. The invention naturally also covers embodiments with solid brake discs. In an embodiment with an internally ventilated brake disc 101, it is particularly advantageous if, as already explained above, at least one outlet opening 141 is provided in the circumferential wall section 14, since this allows the ventilation volume flow to leave the housing 1 and thus reduces the relative overpressure in the interior 11 even more effectively. The outlet opening 141 is suitably covered with a filter medium.

[0053] According to the in Fig. In the embodiment of the brake dust particle filter 10 shown in Figure 3, it has openings 17 in one side wall 12, with guide ribs 15 arranged thereon. The guide ribs 15 are each inclined relative to the housing side wall 12, so that they face in the opposite direction of rotation V in forward travel (see Figure 3). Fig. 6 are positioned). This positioning of the guide ribs 15 allows the circumferential volume flow conveyed by the brake disc 101 to be captured particularly effectively and directed to the vent through the openings 17. In some embodiments, the guide ribs 15 extend axially as close as possible (i.e., as close as necessary while adhering to tolerance and safety requirements) to a friction surface of the brake disc in its assembled state. This has the advantageous effect that the brake dust particles, which are present in particularly high concentrations in the boundary layer flow, can be directed to the filtration system by deflecting the flow via the guide ribs.

[0054] The housing 1 has an end wall 20 at a circumferential end facing away from the brake caliper connection area 19. This end wall connects the housing side walls 12, 13 to the housing circumferential wall section 14 and extends parallel to the axis of rotation L of the brake disc 101. The end wall 20 closes off the housing 1 at an end furthest from the brake caliper.

[0055] In Fig. Figure 4 shows a further embodiment of the brake dust particle filter 10, which has openings 17 in both housing side walls 12, 13 with guide ribs 15 arranged thereon. This is also referred to as a symmetrical configuration and allows for even more effective internal pressure reduction as well as improved filtration due to the larger available surface area.

[0056] At least one side surface 152 of the guide ribs 15 is at least partially covered with filter medium. A top surface 151 (end surface at the free end) can also be covered with filter medium. The guide ribs 152 can also be covered with filter medium on both sides (opposite side surfaces 152).

[0057] At one end of the guide ribs 15 near the side wall 12,13 of the housing, there is a gap 18 between the guide rib 15 and an opposite edge 171 of the opening 17, of a predetermined width, which corresponds to an opening width of the opening cross-section.

[0058] The in Fig. The disc brake arrangement 100 shown in Figure 5 essentially corresponds to the disc brake arrangement 100 according to Figure 5. Fig. 1. The decisive factor here is the position of section BB, which shows the top view of the Fig. 6, in which the brake dust particle filter according to the invention is now shown for the first time with filter medium 6.

[0059] The angle of the guide ribs 15 at the angle α relative to the forward rotation direction V is clearly visible here, and it can be seen that the guide ribs 15 extend almost to a friction surface of the brake disc 101. In some embodiments (not shown), the angle of the guide ribs 15 can vary in the circumferential direction to achieve a homogeneous pressure distribution in the interior 11. Other measures for this purpose include a circumferentially variable opening cross-section of the openings 17 and / or a circumferentially variable thickness of the filter medium 16.

[0060] The guide ribs 15 are coated with filter medium on their side surface 152. Their base surface 150, facing away from the top surface 152, rests against the housing side wall 12. In a one-piece design of guide ribs 15 and side wall 12, the base surface 150 is therefore not an external surface, but an imaginary plane. In the illustrated embodiment, the filter medium 16 is almost as thick as the width of the gap 18 between the guide rib 15 at its end near the side wall 12 and an opposite edge of the opening 17; here, the coverage is approximately 90%. However, a minimal free-flowing cross-section remains between a surface of the filter medium and the opposite edge of the opening 17, through which the filter medium 16 is exposed.

[0061] The filter medium 16 is in particular available as a flat material and is attached to the guide ribs 15, for example welded to the top surface 152.

[0062] Fig. Figure 7 shows a third embodiment of the brake dust particle filter 10, which is similar to the embodiment of the Fig. 3 is very similar (openings on one side and guide ribs) and in which the filter medium 16 is shown. According to this embodiment as well, the openings and the guide ribs 15 arranged thereon are located in a filter insert part 2, which is detachably inserted into the housing side wall 12.

[0063] The filter insert part 2 has a circumferential end wall section 22 (see Fig. 8) which at least partially overlaps the front wall 20 of the housing 1 and thus enables a circumferential positioning of the filter insert part 2.

[0064] The filter insert part 2 itself is in Fig.Figure 8 shows that it can be detachably inserted into a mounting recess provided in the side wall of the brake dust particle filter housing and has a side wall section 21 in which a plurality of openings are provided, from each of which a guide rib 15 extends, which is at least partially covered with filter medium 16. The guide ribs 15 extend in the same direction from the side wall section 21 as the end wall section 22, so that in the installed state (filter insert part inserted into the housing of the brake dust filter) they extend into an interior space of the housing of the brake dust filter. The side wall section 21 of the filter insert part 2 has an annular shape that corresponds to the annular shape of the housing of the brake dust particle filter. Reference symbol list 1 case 11 Interior of the housing 12,13 Case side panel 14 Housing perimeter wall section 141 Outflow opening of the housing circumferential wall section 15 guide rib 150 square meters of floor space 151 Cover area 152 side surface 16 Filter medium 17 Opening the side panel of the housing 171 Edge of the opening 18 Gap between guide rib and edge of opening 19 Brake caliper connection area 20 Front wall 2 Filter insert part 21 Side wall section of the filter insert 22 End wall section of the filter insert 3 Circumferential filter insert part 10 brake dust particle filters 100 disc brake arrangement 101 Brake disc 101' Internal ventilation ducts 102 brake calipers α Angle between sidewall and guide rib V Forward rotation direction R Radial direction T Tangential direction L Rotation axis of the brake disc

Claims

[1] Brake dust particle filter (10) for a disc brake arrangement (100) with a brake disc (101) and a brake calliper (102), wherein the brake dust particle filter (10) is designed to collect particles produced during braking and wherein the brake dust particle filter (10) comprises: - A ring-segment-shaped housing (1) for at least partially accommodating the brake disc (101) in a housing interior (11), wherein the housing (1) has two axially spaced-apart housing side walls (12, 13) and a housing peripheral wall section (14) extending radially outward in the circumferential direction, and wherein the housing peripheral wall section (14) is arranged or formed between the housing side walls (12, 13); - at least one guide rib (15) projecting inwards at least in sections in the housing interior (11) with at least one axial component from at least one housing side wall (12, 13), characterized bythat the guide rib (15) is arranged adjacent to at least one opening (17) present in the housing side wall (12, 13) and the guide rib (15) is at least partially covered with a filter medium (16). [2] Brake dust particle filter (10) according to claim 1, characterized by that the guide rib (15) is located directly at the opening (17). [3] Brake dust particle filter (10) according to claim 1 or 2, characterized by that the filter medium (16) fills a gap (18) between an end of the guide rib (15) near the housing side wall (12, 13) and an opposite edge (171) of the opening (17) to at least 50%, preferably to at least 75%. [4] Brake dust particle filter (10) according to one of claims 1 to 3, characterized by that the guide rib (15) is present at least on the housing side wall (12, 13) which, in a mounting arrangement, faces an outer side of the vehicle. [5] Brake dust particle filter (10) according to one of claims 1 to 4, characterized by that a plurality of guide ribs (15) are distributed over a circumference of the side wall (12, 13), each of which is arranged adjacent to a corresponding opening (17), wherein the guide ribs (15) are at least partially covered with filter medium (16). [6] Brake dust particle filter (10) according to one of claims 1 to 5, characterized by that at least one guide rib (15), preferably all guide ribs (15), are fully covered with the filter medium (16). [7] Brake dust particle filter (10) according to one of the preceding claims, characterized by that the guide rib (15) forms an acute angle (α) with the side wall (12, 13), preferably an angle (α) in a range from 10° to 75°, particularly preferably an angle (α) in a range from 25° to 60°. [8] Brake dust particle filter (10) according to claim 7, characterized bythat the guide rib (15) is set against a predetermined forward rotation direction (V) of the brake disc (101) in an assembled state. [9] Brake dust particle filter (10) according to one of the preceding claims, characterized by that a longitudinal extension of the guide rib (15) runs in the radial direction (R) or tangential direction (T). [10] Brake dust particle filter (10) according to one of claims 5 to 9, characterized by that at least two of the ribs (15) enclose an angle (α) of different sizes with the housing side wall (12, 13) and / or extend axially from the housing side wall (12, 13) to different distances into the housing interior (11). [11] Brake dust particle filter (10) according to one of the preceding claims, characterized byin that the guide rib (15) has a flat cross-sectional shape and at least one base surface (150) facing the housing peripheral wall (12, 13), a cover surface (151) projecting into the housing interior (11) and at least one side surface (152), wherein at least the at least one side surface (152) is at least partially covered with the filter medium (16). [12] Brake dust particle filter (10) according to one of the preceding claims, characterized by that the guide rib (15) has a substantially rectangular cross-section, wherein a ratio of a wide side to a narrow side of the rectangular cross-section is between 15 and 60, preferably between 20 and 40. [13] Brake dust particle filter (10) according to one of the preceding claims, characterized bythat at least one further guide rib (15) which is at least partially covered with filter medium projects from the other housing side wall (12, 13) into the housing interior (11) with at least one axial component, wherein the further guide rib (15) is arranged adjacent to at least one further opening (17) present in the other housing side wall (12, 13). [14] Brake dust particle filter (10) according to one of the preceding claims, characterized by that the guide rib (15) is fluid-impermeable or the guide rib has at least one through-hole which is covered by the filter medium (16). [15] Brake dust particle filter (10) according to one of the preceding claims, characterized by that the at least one guide rib (15) at least partially covered with the filter medium (16) and the corresponding opening (17) are present in a filter insert part (2) detachably coupled to the housing side wall (12, 13). [16] Brake dust particle filter (10) according to one of the preceding claims, characterized by that the housing (1) has a brake calliper connection area (19) at a circumferential end area, which corresponds to a contour of a predetermined brake calliper (102). [17] Brake dust particle filter (10) according to one of the preceding claims, characterized by that the housing (1) has an end wall (20) at a circumferential end facing away from the brake calliper connection area (19), which end wall connects at least one of the housing side walls (12, 13) to the housing circumferential wall section (14) and which preferably extends parallel to a rotation axis (L) of a brake disc (101) in the assembled state. [18] Brake dust particle filter (10) according to claim 16 or 17, characterized bythat the lengths of the guide ribs (15) increase in the circumferential direction away from the brake calliper connection area (19) and / or the opening cross sections of the openings (17) decrease in the circumferential direction away from the brake calliper connection area (19). [19] Brake dust particle filter (10) according to one of the preceding claims, characterized by that the housing (1) is designed as a sheet metal construction and the guide rib (15) and the corresponding opening (17) are preferably designed as formed parts. [20] Disc brake assembly (100), comprising a brake disc (101), a brake calliper (102) and a brake dust particle filter characterized by that the brake dust particle filter is a brake dust particle filter (10) according to one of claims 1 to 18. [21] Disc brake arrangement (100) according to claim 20, characterized bythat the brake dust particle filter (10) is flush with the brake calliper (102) in the circumferential direction of the housing (1), in particular is arranged downstream in the direction of rotation of the brake disc during normal forward travel (V). [22] Filter insert part (2) of a brake dust particle filter (10) according to one of the preceding claims, wherein the filter insert part (2) has the at least one guide rib (15) which is at least partially covered with filter medium (16) and which is adjacent to the opening (17), wherein the filter insert part (2) is detachably coupled to a housing side wall (12, 13) of the brake dust particle filter (10).

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