Vehicle brake dust collecting device, and vehicle braking device

Abstract

The invention relates to a vehicle brake dust collecting device (3), which can be used for collecting and / or extracting by suction brake dust in the region of a brake disc. The vehicle brake dust collecting device (3) has a housing, which has a gap delimiting surface surrounding an interior space. According to the invention, the vehicle brake dust collecting device (3) has a toroidal vortex chamber, which is arranged inside the gap delimiting surface. This toroidal vortex chamber can ensure efficient sealing, with which the degree of efficiency of the vehicle brake dust collecting device (3) can be increased.

Description

[0001] VEHICLE BRAKE DUST COLLECTION DEVICE AND VEHICLE BRAKE DEVICE

[0002] TECHNICAL FIELD OF THE INVENTION

[0003] During braking, vehicle brakes (especially cars, trucks, motorcycles, buses, aircraft, or rail vehicles) generate brake dust due to the frictional contact between a brake pad and a brake disc, which is released into the environment as unwanted particulate matter. The Euro 7 standard was published in 2022, which will also specify binding limits for brake dust in the future. This requires the use of vehicle brake dust collection systems, which capture airborne brake dust (particularly with a filter) and feed it into a collection chamber.Such vehicle brake dust collection devices must be located immediately behind the frictional contact between the brake pad and the brake disc, whereby a seal between a housing of the vehicle brake dust collection device and the brake disc is required to prevent the brake dust from escaping from the vehicle brake dust collection device into the environment, bypassing the filter and the collection chamber.

[0004] STATE OF THE ART

[0005] DE 10 2019 133 772 B4 discloses a vehicle brake dust collection device in which a housing is designed as a cover that is sealed off from the brake disc by a wiper. A separating device is arranged upstream of the wiper in the direction of movement of the brake disc. This separating device is intended to separate the boundary layer of the brake disc, along with the brake dust transported therein, from the brake disc. The separating device has a blow-out device with a blow-out channel that is directed at an acute angle toward the brake disc, opposite to the flow of the boundary layer. Air flowing from the blow-out channel onto the brake disc separates the boundary layer, which is then fed to a filter with a collection container via a suction device. Here, the cover completely encloses the brake caliper and the brake pads.

[0006] DE 10 2020 105 240 B4 proposes that a cover of a vehicle brake dust collection device extends behind the brake pad over at least a circumferential angle of 60 degrees in the direction of movement of the brake disc. Between the cover and the circular ring segment of the brake disc behind the brake pad, which is covered by the cover, the cover and the brake disc form a circular ring-segment-shaped flow channel section that is open on both sides. DE 10 2020 105 240 B4 proposes arranging a vortex generator in the flow channel section. The longitudinal axis of the vortex generator is oriented vertically to the circumferential direction and parallel to the axis of rotation of the brake disc, so that the vortex generator projects into the flow channel section and is flowed around. In cross-section, the vortex generator is designed similar to the profile of an airfoil.The vortex generator generates vortices in which a circumferential flow component is superimposed with a swirl flow component whose vortex axis is oriented parallel to the brake disc's rotational axis. The turbulent flow thus generated in the flow channel section is intended to dislodge brake dust deposited on the brake disc.

[0007] DE 102020 105 241 B4 discloses a vehicle brake dust collection device in which a flow channel formed behind a brake pad has a decreasing height to increase the flow velocity. By means of a cutting edge arranged closely adjacent to the brake disc, the boundary layer thus accelerated, along with the brake dust collected therein, is detached from the brake disc and fed into an outlet channel. The outlet channel is S-shaped, so that the detached boundary layer containing the brake dust is deflected several times. As a result of these deflections, the brake dust can be deposited on the walls of the S-shaped outlet channel.

[0008] OBJECT OF THE INVENTION

[0009] The present invention is based on the object of proposing a vehicle brake dust collection device that is improved, in particular, with regard to the seal between a housing of a vehicle brake dust collection device and a brake disc and / or the separation of the boundary layer containing brake dust from a brake disc and / or the effectiveness even in the event of wear of the brake disc and / or the cooling of the brake disc and / or the prevention of wear of a seal relative to the brake disc. Furthermore, the invention is based on the object of proposing a correspondingly improved vehicle braking device.

[0010] SOLUTION

[0011] The object of the invention is achieved according to the invention with the features of the independent patent claims. Further preferred embodiments of the invention can be found in the dependent patent claims.

[0012] DESCRIPTION OF THE INVENTION

[0013] The invention proposes a vehicle brake dust collection device used for collecting and / or extracting brake dust in the area of ​​a brake disc. The vehicle brake dust collection device has a housing, which can also be designed as an extraction hood according to the prior art. The vehicle brake dust collection device can be arranged downstream of a brake caliper with the brake pad. It is also possible for the brake caliper with the brake pad and the vehicle brake dust collection device to form a single structural unit with a cover covering the structural unit.

[0014] An interior of the vehicle brake dust collection device, in which the required components of the vehicle brake dust collection device, such as a suction device, a filter, and / or a blow-out device, can be arranged, is surrounded by a gap-delimiting surface that, together with the brake disc, defines a circumferential sealing gap. The gap-delimiting surface of the vehicle brake dust collection device can be formed with a seal that bears directly against the brake disc. Preferably, however, the gap-delimiting surface is formed by an inner surface of a housing wall of the housing or the cover, positioned at a small distance from the brake disc.

[0015] The invention proposes that the vehicle brake dust collection device comprise a torus swirl chamber. The torus swirl chamber is arranged inward of the gap-delimiting surface (when viewed from above onto the braking surface of the brake disc with which the vehicle brake dust collection device is operatively connected, viewed parallel to the rotational axis of the brake disc), with the torus swirl chamber preferably being arranged immediately adjacent and radially inward of the gap-delimiting surface. The torus swirl chamber thus extends along the gap-delimiting surface and the sealing gap formed by the gap-delimiting surface.

[0016] The vortices formed in the torus vortex chamber have a positive influence on the flow conditions in the direction of flow upstream and / or downstream of the sealing gap, and possibly also within the sealing gap itself. The torus vortex chamber is preferably permeated by vortices with a complex flow pattern corresponding to the torus shape, and this complex flow pattern is advantageously utilized within the scope of the invention.

[0017] Preferably, a vortex flow is generated in the torus swirl chamber, resulting from the superposition of (at least) two flow components. One circumferential flow component is oriented in the circumferential direction of the torus swirl chamber, whereby the circumferential flow component can, for example, follow the inner contour of the gap boundary surface and the sealing gap. Another flow component, namely a vortex flow component, is oriented in a very simplified manner in a circular, vortex, or spiral shape around the circumferential direction of the torus swirl chamber, so that the vortex flow component circulates in a cross-section of the torus swirl chamber, the cut of which is vertical to the circumferential direction, and is guided in the cross-section by the shape of the torus swirl chamber. The vortex flow component is oriented in the direction of movement of the brake disc in the entry area of ​​the brake disc into the housing (and past the gap boundary surface of the housing).Thus, the vortex flow component in the inlet area supports the entry of air and thus also of brake dust into the vehicle brake dust collection system, reducing the risk of the brake dust not reaching the vehicle brake dust collection system at all. It is also possible that the vortex flow component in the inlet area causes or supports the separation of the boundary layer with the brake dust contained therein. Furthermore, the vortex flow component is oriented around the cross-section of the torus swirl chamber in the area where the brake disc exits the housing (and in the area or in front of the gap boundary surface and the sealing gap) against the direction of movement of the brake disc.If the brake disc strives to convey brake dust not separated by the vehicle brake dust collection device with the boundary layer from the outlet area into the environment, the opposing vortex flow component can at least reduce this undesirable conveyance of brake dust into the environment. Preferably, the vortex flow component encounters the boundary layer in the outlet area, at least partially detaches the boundary layer, and guides the at least partially detached boundary layer, together with the brake dust contained therein, to a collection chamber, a filter, and / or an extraction device. In this way, the efficiency of the vehicle brake dust collection device can be increased. Alternatively or cumulatively, the vortex flow component in the outlet area can also lead to brake dust deposited on the brake disc being detached.Alternatively or cumulatively, it is possible that the vortex flow component leads to cooling of the brake disc both in the inlet area of ​​the brake disc and in the outlet area of ​​the brake disc from the housing. It is also possible that the vortex flow is preferably formed only from "clean ambient air" that does not contain brake dust.

[0018] In principle, the cross-section of the torus vortex chamber can be constant in the circumferential direction or can vary as desired. For a particular proposal of the invention, the cross-section of the torus vortex chamber is larger in the area where the brake disc enters the housing than in the area where the brake disc exits the housing. By designing the geometry, the velocity of the vortex flow component can be influenced, which in turn can influence the aforementioned effects desired by the invention.

[0019] There are many possibilities for the cross-section and / or cross-sectional shape of the torus swirl chamber within the scope of the invention. In one proposal of the invention, the cross-section of the torus swirl chamber is circularly arcuate, concave, or curved, at least in the area where the brake disc enters the housing and / or at least in the area where the brake disc exits the housing. The vortex flow component is guided around the cross-section of the torus swirl chamber along the circularly arcuate, concave, or curved boundary of the torus swirl chamber. In a first variant of the invention, the cross-section of the torus swirl chamber (at least along a partial circumference of the torus swirl chamber, in the area of ​​entry and / or exit) is closed at the edge except for an opening in the direction of the brake disc. The flow in the torus swirl chamber can then come into active contact with the brake disc and the boundary layer of the brake disc via the opening.

[0020] In another variant of the invention, the torus swirl chamber is equipped with a further opening in addition to the opening facing the brake disc, which is connected to an injection device or a suction device. The injection device and / or suction device influences the pressure conditions in the torus swirl chamber via the opening. The injection device or the suction device generates a pressure and / or a flow in the region of the opening that is such that the flow in the torus swirl chamber is advantageously influenced. Preferably, the injection device or the suction device and the pressure conditions generated thereby in the region of the opening and / or the flow through the opening support the formation of the vortex flow component.For this purpose, for example, the further opening can be arranged such that the flow generated by the injection device and / or the suction device is oriented tangentially to the vortex flow component, whereby the vortex flow component can be supported and reinforced.

[0021] According to a further proposal, in a vehicle brake dust collection device according to the invention, the torus swirl chamber is equipped with a tongue or edge in the outlet area [or, for another variant, in the inlet area], which is arranged closely adjacent to the brake disc and oriented opposite to the direction of movement of the brake disc [or, for the other variant, in the direction of movement of the brake disc]. In the area of ​​these tongues or edges, the brake disc and its boundary layer interact with the flow in the torus swirl chamber. Preferably, the opening of the torus swirl chamber, through which the torus swirl chamber is open toward the brake disc, is directly adjacent to the tongue or edge.

[0022] According to one embodiment of the invention, a circumferential axis of the torus swirl chamber, viewed from above, roughly corresponds to the outer geometry of a circular ring segment whose center coincides with the axis of rotation of the brake disc. It is possible for a leading edge of the torus swirl chamber, in the direction of movement of the brake disc, and / or a trailing edge of the torus swirl chamber, in the direction of movement of the brake disc, to be oriented radially to the axis of rotation of the brake disc. In the region of this edge, the brake disc and the boundary layer come into operative contact with the vehicle brake dust collection device. It is also possible for a radially outer edge and / or a radially inner edge of the torus swirl chamber to be concentric to the axis of rotation of the brake disc, whereby the brake disc and its boundary layer move tangentially to these radial edges, and no significant entry of the boundary layer occurs via these edges.A further proposal of the invention utilizes precisely such an entry for a special effect: In this case, the radially outer edge and / or the radially inner edge of the torus vortex chamber are not concentric with the axis of rotation of the brake disc, but are inclined at an angle. This results in the boundary layer being entered into the torus vortex chamber via the rotating brake disc. Depending on the angle of inclination, such an entry occurs with one entry component oriented in the direction of the circumferential axis of the torus vortex chamber, and with another entry component oriented in a vortex-like manner around the circumferential axis of the torus vortex chamber. In this way, on the one hand, conveyance in the torus vortex chamber in the circumferential direction of the latter and thus of the circumferential flow component, and on the other hand around the cross section of the torus vortex chamber and thus of the vortex flow component can be induced and / or supported.Preferably, this conveyance into the torus swirl chamber is enabled and / or supported by the fact that a negative pressure prevails in the vehicle brake dust collection device, which can be caused by the suction device and / or the relative movement of the brake disc with respect to the vehicle brake dust collection device.

[0023] A further solution to the problem underlying the invention is provided by a vehicle braking device. The vehicle braking device has a vehicle brake with a brake pad held on a brake caliper and with a brake disc. The vehicle brake has an actuator with which the brake pads can be pressed against the brake disc to generate a braking effect. The vehicle braking device according to the invention further has a vehicle brake dust collection device, as previously described. The vehicle brake dust collection device is arranged behind the vehicle brake in the direction of movement of the brake disc. In this way, the vehicle brake dust collection device can separate and collect brake dust that arises in the vehicle brake. Advantageous developments of the invention emerge from the patent claims, the description, and the drawings.

[0024] The advantages of features and combinations of several features mentioned in the description are merely exemplary and can be effective alternatively or cumulatively, without the advantages necessarily having to be achieved by embodiments according to the invention.

[0025] With regard to the disclosure content – ​​not the scope of protection – of the original application documents and the patent, the following applies: Further features can be found in the drawings – in particular the illustrated geometries and the relative dimensions of several components to one another, as well as their relative arrangement and operative connection. The combination of features of different embodiments of the invention or features of different patent claims is also possible, deviating from the chosen references of the patent claims, and is hereby encouraged. This also applies to features that are illustrated in separate drawings or mentioned in their description. These features can also be combined with features of different patent claims.Likewise, features listed in the patent claims may be omitted for further embodiments of the invention, but this does not apply to the independent patent claims of the granted patent.

[0026] The number of features mentioned in the claims and the description is to be understood as meaning that exactly this number or a greater number than the stated number is present, without the need for the explicit use of the adverb "at least." Thus, for example, if reference is made to one element, this is to be understood as meaning that exactly one element, two elements, or more elements are present. The features mentioned in the claims may be supplemented by further features or may be the only features present in the subject matter of the respective claim.

[0027] The reference symbols contained in the patent claims do not represent a limitation of the scope of the subject matter protected by the patent claims. They serve solely to make the patent claims easier to understand. BRIEF DESCRIPTION OF THE FIGURES

[0028] In the following, the invention is further explained and described with reference to preferred embodiments shown in the figures.

[0029] Fig. 1 shows a highly schematic plan view of a vehicle braking device with a vehicle brake and a vehicle brake dust collection device.

[0030] Fig. 2 shows a schematic plan view of the vehicle brake dust collection device according to Fig. 1 with a gap boundary surface and a torus vortex chamber.

[0031] Fig. 3 shows a section III-III through a vehicle brake dust collection device with brake disc according to Fig. 1.

[0032] FIGURE DESCRIPTION

[0033] Fig. 1 shows a vehicle braking device 1. The vehicle braking device 1 has a vehicle brake 2 and a vehicle brake dust collection device 3. The vehicle brake 2 has a brake disc 4, which rotates about a rotational axis 6 when the vehicle travels forward in a direction of movement 5. Furthermore, the vehicle brake 2 has a brake caliper 7, in the region of which a brake pad 9 can be pressed against the brake disc 4 by means of an actuator 8 (this is shown only schematically here).

[0034] The vehicle brake dust collection device 3 is arranged in the direction of movement 5 behind the brake pad 9 (and possibly also behind the brake caliper 7), wherein the vehicle brake dust collection device 3 preferably partially, completely, or overlappingly covers a radial region within which the brake pad 9 extends. Preferably, the vehicle brake dust collection device 3 is arranged in the direction of movement 5 directly or at a small distance behind the brake pad 9 (and possibly also behind the brake caliper 7), wherein it is also possible for the vehicle brake dust collection device 3 to enclose or partially enclose the brake caliper 7. It is also possible for the brake caliper 7 to emerge from the largely enclosed brake caliper 7 from the radially outer region of the vehicle brake dust collection device 3. Fig.2 shows the vehicle brake dust collection device 3 in a plan view viewed parallel to the axis of rotation 6 in the direction of the brake disc 4, wherein, in deviation from the drawing conventions, inner edges and boundaries are shown with solid lines. The vehicle brake dust collection device 3 has a front edge 10 facing the brake pad 9, a rear edge 11 facing away from the brake pad 9, a radially inner edge 12 and a radially outer edge 13. In the area of ​​the front edge 10, an inlet region 14 is formed, in the area of ​​which the brake disc 4, with the boundary layer and the brake dust carried along by it, comes into active contact with the vehicle brake dust collection device 3. The brake disc 4 then exits the vehicle brake dust collection device 3 again (ideally without the brake dust) in an exit region 15 formed by the rear edge 11.

[0035] The vehicle brake dust collection device 3 has an interior space 16. A collection chamber, at least one filter, a suction device, and / or a blow-out device, as well as other functionally necessary components for bringing about the brake dust collection effect, can be arranged in the interior space 16. The interior space 16 is separated from the surroundings and the edges 10, 11, 12, 13 by a gap-delimiting surface 17 surrounding the interior space and a sealing gap 27 formed between the gap-delimiting surface 17 and the brake disc 4. In the region of the gap-delimiting surface 17, a housing 18, in particular a cover 19, can form the sealing gap 27 directly with the brake disc 4, or a seal can be present here, which rests against the brake disc 4 and enables the necessary relative movement.

[0036] Furthermore, a torus swirl chamber 20, which is marked in gray in Fig. 2, surrounds the interior 16 on the inside of the gap boundary surface 17. The torus swirl chamber 20, which runs circumferentially along a circumferential axis 40, has a cross-section that is at least roughly circular when cut vertically to the circumferential axis 40. The torus swirl chamber 20 is arranged on the side facing the brake disc 4 approximately flush with the gap boundary surface 17 or the sealing gap 27, while from here the torus swirl chamber 20 extends with its cross-section away from the brake disc 4.

[0037] At the front edge 10, the brake disc enters the inlet region 14 with the boundary layer in the direction of movement 5 of the brake disc 4. As a result, in the inlet region 14, the flow of the boundary layer does not generate a significant circumferential flow component 23 in the direction of the circumferential axis 40. However, the movement of the brake disc 4 with the boundary layer causes a vortex flow component 26 to be generated or strengthened in the torus vortex chamber 20 in the inlet region 14.

[0038] In both a radially outer region 21 and a radially inner region 22, the boundary layer is introduced into the torus vortex chamber 20 by the brake disc 4 in the direction of movement 5. Since the radius and thus the flow velocity of the boundary layer is greater in the radially outer region 21, the input of flow energy occurring here outweighs the input of flow energy in the radially inner region 22. The input of the boundary layer into the radial regions 21 leads to a circumferential flow component 23 being caused or strengthened.

[0039] Furthermore, the radial regions 21, 22 are not oriented concentrically to the axis of rotation 6 of the brake disc 4. Rather, the radially outer region 21 diverges outwards in the direction of movement 5 of the brake disc 4, while the radially inner region 22 diverges radially inwards in the direction of movement 5 of the brake disc 4. This means that the boundary layer of the brake disc 4 enters the radially outer region 21 of the torus swirl chamber 20 at an inclination angle 24 and enters the radially inner region 22 of the torus swirl chamber 20 at an inclination angle 25 (cf. Fig. 1). These inclination angles 24, 25 result in the boundary layer of the brake disc 4 entering the regions 21, 22 with a component that contributes to the circumferential flow component 23 in the circumferential direction of the torus swirl chamber 20.However, another component of the boundary layer due to the inclination angles 24, 25 also results in a contribution for the vortex flow component 26.

[0040] An overall resulting vortex flow component 26 in the torus vortex chamber 20 thus results from a superposition of an entry of the boundary layer in the entry region 14 and the components of the entry of the boundary layer into the radial regions 21, 22 resulting from the inclination angles 24, 25. The vortex flow component 26, however, is reduced by the oppositely oriented energy input of the boundary layer in the exit region 15.

[0041] Fig. 3 shows a highly schematic section III-III with a section according to Fig. 1 through the vehicle brake dust collection device 3. It can be seen in Fig. 3 that in the inlet region 14 the vortex flow component 26 in the torus vortex chamber 20 has a flow which, on the side facing the brake disc, is oriented parallel to the direction of movement 5 of the brake disc and the boundary layer, so that the conveying movement of the brake disc 5 for the boundary layer downstream of the brake pad 9 is supported by the vortex flow component 26 and the reliability of the entry of the brake dust into the interior 16 is increased by the torus vortex chamber 20.

[0042] By contrast, in the exit region 15, the vortex flow component 26 on the side facing the brake disc 4 is oriented opposite to the direction of movement 5 of the brake disc 4, so that the escape of the boundary layer and the brake dust entrained thereby is at least reduced. In this way, a sealing effect of a seal that is part of the gap boundary surface 17 can be supported. It is even possible for the gap boundary surface 17 to be designed without a seal that contacts the brake disc 4 and for only a small sealing gap 27 to be formed between the gap boundary surface 17 and the brake disc 4. It is even possible for a sealing effect of this sealing gap 27 to be maintained at least to a limited extent, even if the height of the sealing gap 27 increases as a result of wear on the brake disc 4.

[0043] In the inlet region 14, the torus swirl chamber 20 borders the sealing gap 27 via a tongue or cutting edge 28. Similarly, in the outlet region 15, the torus swirl chamber 20 borders the sealing gap 27 via a tongue or cutting edge 29. Here, the tongue 28 is oriented in the direction of movement 5 of the brake disc 4, while the tongue or cutting edge 29 is oriented opposite to the direction of movement 5 of the brake disc 4.

[0044] Fig. 3 shows an optional special feature of the vehicle brake dust collection device 3 according to the invention. Here, the vehicle brake dust collection device 3 includes a suction device 30 and a blow-out device 31. The blow-out device 31 has a flow channel 32, which is oriented with a component opposite to the direction of movement 5 of the brake disc and inclined at an acute angle, and from which air is blown out onto the brake disc 4 to detach the boundary layer. The boundary layer 33 thus detached, with the brake dust contained therein, then enters a flow channel 34 of the suction device 30. As shown in Fig. 3, a further flow channel 35 of the suction device 30 can be arranged downstream of the flow channel 32 of the blow-out device 31. A further tongue or cutting edge 36 can be arranged in the region of the inlet opening of the flow channel 35.Behind the tongue or cutting edge 36, a type of undercut can be formed, resulting in pressure conditions that in turn result in a fluid flow 42 and can lead to a further strengthening of the vortex flow component 26. Furthermore, the air flows in the flow channel 35 tangentially to the vortex flow component 26, which can further strengthen the vortex flow component 26. The flow in the flow channel 34 is also oriented tangentially to the vortex flow component 26 in the inlet region 14 of the torus vortex chamber 20, which can further strengthen the vortex flow component 26.

[0045] In Fig. 3, the cross-section of the torus vortex chamber 20 in the inlet region 14 has an opening 37 facing the brake disc 4. In addition to the interaction of the flow in the torus vortex chamber 20 with the boundary layer, in the region of this opening 37, the flow in the torus vortex chamber 20 also interacts with the flow in the flow channel 34.

[0046] In the outlet region 15, the torus vortex chamber 20 also has an opening 38 facing the brake disc 4. Via a further opening 39, the flow in the torus vortex chamber 20 also comes into active connection with the flow in the flow channel 35.

[0047] It can also be seen in Fig. 3 that the torus vortex chamber 20 (at least in the inlet region 14 and the outlet region 15) has a boundary 41 with a circular arc-shaped, concave cross-section, along which the vortex flow component 26 is guided.

[0048] In Fig. 2, the circumferential axis 40 indicates the direction of extension of the torus swirl chamber 20, along which the circumferential flow component 23 flows through the torus swirl chamber 20. In contrast, the vortex flow component 26 describes a swirling or rolling movement of the flow in a cross-section of the torus swirl chamber 20 with a cut vertical to the circumferential axis 40, with this vortex movement and the vortex flow component 26 being guided by the wall delimiting the torus swirl chamber 20. A maximum radial extension of the torus swirl chamber 20 is adapted to the radial extension of the sliding contact of the brake pad 9 with the brake disc 4.Preferably, the maximum radial extent of the torus vortex chamber 20 is between 50% and 150% (in particular between 70% and 130%, between 80% and 120% or between 90% and 110%) or more than 70%, more than 80%, more than 90% or more than 100%, more than 110% or more than 150% of the radial extent of the sliding contact of the brake pad 9 with the brake disc 4.

[0049] The torus vortex chamber 20 can have any shape, including a non-circular shape. For example, the torus vortex 20 can roughly have the shape of a donut, whereby the cross-sectional shape can be arbitrary and / or the sides of the donut can be flattened and / or inclined at an angle of inclination 24, 25, as explained.

[0050] The superposition of the circumferential flow component 23 and the vortex flow component 26 causes the flow to wind around the torus vortex chamber 20 along the circumferential axis 40. However, the explanation provided here, with the division of the flow into a circumferential flow component 23 and a vortex flow component 26, is merely intended to explain an effect that is possible within the scope of the invention but does not limit the invention. In actual practice, different flow conditions may arise, which may also depend on the rotational speed of the brake disc 4. For example, it is also possible that no circumferential flow component 23, or only a relatively small one, forms.

[0051] LIST OF REFERENCE SYMBOLS

[0052] Vehicle braking system

[0053] Vehicle brake

[0054] Vehicle brake dust collection system

[0055] brake disc

[0056] Direction of movement

[0057] axis of rotation

[0058] brake caliper

[0059] Actuator

[0060] Brake pad front edge rear edge radial inner edge radial outer edge

[0061] Entrance area

[0062] Exit area

[0063] Interior

[0064] Gap boundary surface

[0065] Housing

[0066] Cover

[0067] Torus vortex chamber radially outer area radially inner area

[0068] Circumferential flow component

[0069] Angle of inclination

[0070] Angle of inclination

[0071] Vortex flow component

[0072] Sealing gap

[0073] Tongue or cutting edge in the entry area

[0074] Tongue or cutting edge in the exit area

[0075] Extraction device

[0076] Blow-out device

[0077] Flow channel boundary layer flow channel flow channel tongue, cutting edge opening opening opening circumferential axis boundary fluid flow

Claims

PATENT CLAIMS 1. Vehicle brake dust collection device (3) for collecting and / or extracting brake dust in the area of ​​a brake disc (4), with a housing (18) which has a gap-delimiting surface (17) surrounding an interior space (16), characterized by a torus swirl chamber (20) which is arranged inside the gap-delimiting surface (17).

2. Vehicle brake dust collection device (3) according to claim 1, characterized in that a) a vortex flow with a superposition of a circumferential flow component (23) and a vortex flow component (26) is formed in the torus vortex chamber (20), b) wherein the vortex flow component (26) ba) in an inlet region (14) of the brake disc (4) into the housing (18) in the direction of movement (5) of the brake disc (4) and bb) in an outlet region (15) of the brake disc (4) from the housing (18) opposite to the direction of movement (5) of the brake disc (4).

3. Vehicle brake dust collection device (3) according to claim 1 or 2, characterized in that the cross section of the torus swirl chamber (20) in the inlet region (14) of the brake disc (4) into the housing (18) is larger than in the outlet region (15) of the brake disc (4) from the housing (18).

4. Vehicle brake dust collection device (3) according to claim 2, characterized in that at least in the inlet region (14) of the brake disc (4) into the housing (18) and / or at least in the outlet region (15) of the brake disc (4) from the housing (18), a boundary (41) of the torus swirl chamber (20) is formed in a circular arc-shaped, concave or curved cross-section.

5. Vehicle brake dust collection device (3) according to one of the preceding claims, characterized in that the cross section of the torus swirl chamber (20) at least in the inlet area (14) and / or in the outlet area (15) is designed to be edge-closed except for an opening (37, 38) in the direction of the brake disc (4).

6. Vehicle brake dust collection device (3) according to one of claims 1 to 4, characterized in that the torus swirl chamber (20) a) has an opening (38) in the direction of the brake disc (4) and b) has an opening (39) which is connected to a blow-out device (31) or a suction device (30).

7. Vehicle brake dust collection device (3) according to one of the preceding claims, characterized in that a) the torus swirl chamber (20) in the outlet region (15) has a tongue or cutting edge which is arranged closely adjacent to the brake disc (4) and is oriented opposite to the direction of movement (5) of the brake disc (4), and / or b) the torus swirl chamber (20) in the inlet region (14) has a tongue or cutting edge which is arranged closely adjacent to the brake disc (4) and is oriented in the direction of movement of the brake disc (4).

8. Vehicle brake dust collection device (3) according to one of the preceding claims, characterized in that a circumferential axis (40) of the torus swirl chamber (20) in a plan view corresponds in rough approximation to the outer geometry of a circular ring segment.

9. Vehicle brake dust collection device (8) according to one of the preceding claims, characterized in that a radially outer edge (13) and / or a radially inner edge (12) of the torus swirl chamber (20) is not concentric with the axis of rotation (6) of the brake disc (4), but is inclined at an angle of inclination (24; 25).

10. Vehicle braking device (1) with a) a vehicle brake (2) with a brake pad (9) held on a brake calliper (7) and a brake disc (4), wherein the brake pad (9) can be pressed against the brake disc (4) by means of an actuator (8) to generate a braking effect, and b) a vehicle brake dust collecting device (3) according to one of claims 1 to 9, which is arranged behind the vehicle brake (2) in the direction of movement (5) of the brake disc (4).

Images