Vehicle brake, in particular a commercial vehicle compressed air disc brake, and a pressure piece therefor

Abstract

A vehicle brake (2, 102), in particular a compressed air disc brake for a commercial vehicle, comprises a brake caliper (4), a pressure piece guide (8) arranged in the brake caliper (4), and a pressure piece (6) guided in the pressure piece guide (8) along a movement axis (10), wherein the pressure piece guide (8) is designed as a recess (12) and the pressure piece (6) has an outer contour (14) corresponding to the recess. The outer contour (14) of the pressure piece guide (8) and / or the pressure piece is divided on both sides of the pressure piece (6) into a plurality of curved, mutually spaced partial surfaces.

Description

Technical Field

[0001] The invention relates to a vehicle brake, in particular a compressed air disc brake for a commercial vehicle, comprising a brake caliper, a pressure piece guide arranged in the brake caliper, and a pressure piece guided in the pressure piece guide along a movement axis, wherein the pressure piece guide is configured as a recess and the pressure piece has an outer contour corresponding to the recess. Background Art

[0002] Such vehicle brakes are known from the prior art, in which a so-called pressure piece is guided along the axis of movement in a pressure piece guide arranged in the brake caliper. In the vehicle brakes known from the prior art, so-called guide strips or alternatively half-moon-shaped guides are used to guide the pressure piece in the brake caliper. Guide strips offer the advantage that the guide play of the pressure piece in the pressure piece guide can be adjusted independently of the direction by simply adjusting the guide strips. However, a significant disadvantage of such guide strips is that they are complex to produce, which has a negative impact on production costs.

[0003] The likewise known half-moon-shaped guides can be produced significantly simpler and more cost-effectively overall. However, the half-moon-shaped basic geometry of such guides makes it difficult to adjust the guide play between the pressure piece and the pressure piece guide. In particular, the half-moon-shaped guides are associated with lateral guide play in the direction to be supported.

[0004] The lateral guide play has a component in a first direction and a component in a second direction orthogonal to the first direction, the first direction and the second direction each being transverse to the longitudinal axis of the pressure piece. The longitudinal axis of the pressure piece is understood here to be the main direction of movement of the pressure piece when the braking function is applied. In the case of a conventional installation of a vehicle brake, the first direction is vertical and the second direction is horizontal. With respect to the orientation relative to the brake disk, the first direction is understood, for example, to be the radial direction and the second direction is understood to be the circumferential direction, i.e. the tangential direction.

[0005] It has proven to be particularly disadvantageous here that the lateral guide play can be adjusted only inadequately and independently of one another in the first and second directions. Summary of the invention

[0006] Starting from the prior art described, the object of the present invention is therefore to improve a vehicle brake of the type mentioned at the outset in such a way that the disadvantages occurring in the prior art are eliminated as completely as possible. In particular, a vehicle brake is to be specified whose pressure piece or pressure piece guide can be produced with little effort and in which a simple, largely independent and precise adjustment of the lateral guide play in the first and second directions can be carried out simultaneously.

[0007] According to the invention, this object is achieved in a vehicle brake of the aforementioned type in that the pressure piece guide and / or the outer contour of the pressure piece is divided on both sides of the pressure piece into a plurality of curved partial surfaces spaced apart from one another.

[0008] By such a design of the partial surfaces, a targeted and largely independent adjustability of the lateral guide play in the first and second directions is possible. Such partial surfaces can also be manufactured with less effort than guide strips known from the prior art.

[0009] The invention is improved in that the partial surface has a contact surface for supporting the pressure piece on the pressure piece guide, wherein the contact surface extends at least partially in the direction of the movement axis and wherein the contact surface on the pressure piece has a convex curvature in the region of a reference plane perpendicular to the movement axis of the pressure piece, while the opposite contact surface on the recess has a preferably corresponding, concave curvature in the region of the reference plane. In this context, contact surfaces are understood to be those surfaces on which the pressure piece and the recess contact one another.

[0010] Due to this curved design of the contact surface, which, depending on its arrangement on the pressure piece, has a convex curvature or, in the case of an arrangement on a recess, has a concave curvature, the contact area between the pressure piece and the pressure piece guide remains sufficiently small, wherein at the same time a targeted adjustment of the guide play can be achieved by a targeted design, for example by a targeted arrangement or by a targeted curvature profile of the contact surface. In particular, it is possible to adjust the lateral guide play in the first and second directions as independently of one another as possible.

[0011] According to a preferred embodiment, the concave curvature and / or the convex curvature is in the region of the reference plane as a partial circle. Such a partial circle can be precisely manufactured with a clear manufacturing effort and has proven to be advantageous for adjusting the guide play.

[0012] Furthermore, it is provided according to a preferred embodiment that the pressure piece guide and / or the pressure piece has a first contact surface pair for lateral guidance of the pressure piece in a first direction and / or a second contact surface for lateral guidance of the pressure piece in a second direction. By means of such an arrangement, on the one hand, operating forces and moments can be reliably transmitted from the pressure piece to the pressure piece guide and vice versa, and at the same time, lateral guide play can be adjusted in the first and second directions as independently of one another as possible.

[0013] Preferably, at least one of the contact surfaces of the contact faces is formed in the reference plane region by a partial circle segment with a first radius R1 and a center C1, and / or the second contact surface is formed in the reference plane region by a partial circle segment with a second radius R2 and a second center C2. By suitable selection of the radii R1 and R2 and the centers C1 and C2, the lateral guide play can be suitably adjusted in the first and second directions.

[0014] It is preferred that the radii R1 and R2 differ from one another in terms of their size. Additionally or alternatively, it is preferred that the centers C1 and C2 differ from one another.

[0015] The invention is further developed in that a separating surface is arranged between the contact surfaces. Such a separating surface arrangement between the contact surfaces has proven to be advantageous for decoupling lateral guide play in the first and second direction from one another.

[0016] According to a preferred embodiment, the separating surface of the pressure piece guide has a curvature in the reference plane region that differs from the curvature of the contact surface and / or the separating surface on the pressure piece has a curvature in the reference plane region that differs from the curvature of the contact surface on the pressure piece. In this case, the curvature direction of the separating surface is preferably sectionally opposite to the curvature direction of the contact surface with respect to the respective component (pressure piece or pressure piece guide) in order to simultaneously achieve a smooth transition between the contact surface and the separating surface and a spacing between the pressure piece and the pressure piece guide.

[0017] Furthermore, it is preferred that at least one dividing surface, preferably a plurality of or all dividing surfaces, are configured at least in sections as partial circles in the region of the reference plane.

[0018] According to an alternative preferred embodiment, the partial surfaces of the separating surface and the contact surface transition into each other without interruption, in particular continuously, that is to say without bending and without abrupt changes. Preferably, this uninterrupted transition is formed directly between the curved surface sections, or a non-curved intermediate section is arranged between each two curved surface sections.

[0019] According to an alternative preferred embodiment, a preferably kink-free intermediate section is arranged at the transition between two curved sections. Such an intermediate section can be designed, for example, as a straight line or as an alternatively designed section.

[0020] At present, the invention has been described with reference to a vehicle brake.In a further aspect, the invention relates to a pressure shoe or a brake caliper for a vehicle brake, in particular a pressure shoe or a brake caliper for a commercial vehicle compressed air disc brake.

[0021] The invention achieves the aforementioned object with respect to a pressure piece or a brake caliper in that the pressure piece has an outer contour which is divided into a plurality of mutually spaced partial surfaces, or the brake caliper has a pressure piece guide which has a recess which is divided into a plurality of mutually spaced partial surfaces.

[0022] The invention is improved in the case of a pressure piece by the part surface having a contact surface for supporting the pressure piece on a pressure piece guide, wherein the contact surface extends at least partially in the direction of the axis of motion of the pressure piece and wherein the contact surface on the pressure piece has a convex curvature in the region of a reference plane perpendicular to the axis of motion of the pressure piece. For a brake caliper, corresponding features also apply to the recess, wherein the part surface has a contact surface for supporting the pressure piece on a pressure piece guide, wherein the contact surface extends at least partially in the direction of the axis of motion of the pressure piece and wherein the contact surface on the pressure piece guide has a concave curvature in the region of a reference plane perpendicular to the axis of motion of the pressure piece.

[0023] Furthermore, the convex or concave curvature preferably each takes the form of a partial circle in the region of the reference plane.

[0024] According to a preferred development, the pressure piece or the brake caliper each has a first contact surface pair for laterally guiding the pressure piece in a first direction and / or a second contact surface pair for laterally guiding the pressure piece in a second direction.

[0025] The present invention is improved in that at least one of the contact surfaces facing each other is formed in the reference plane region by a partial circle segment having a first radius R1 and a center C1, and / or the second contact surface is formed in the reference plane region by a partial circle segment having a second radius R2 and a second center C2.

[0026] Preferably, the radii R1 and R2 differ from one another in terms of their size and / or the centers C1 and C2 differ from one another.

[0027] Furthermore, a separating surface is preferably arranged between the contact surfaces.

[0028] The invention is improved in that the partial surfaces of the separating surface and the contact surface transition into one another without interruption, in particular continuously, that is to say without kinks and abrupt changes. Preferably, this uninterrupted transition is formed directly between the curved surface sections, or a non-curved intermediate section is arranged between each two curved surface sections.

[0029] According to a preferred embodiment, the compact is designed as a casting. Preferably, the dividing surface is already provided in the blank contour of the casting, in particular. This can further reduce the processing effort of the compact.

[0030] According to another preferred embodiment, the brake caliper with the pressure piece guide is designed as a casting. Preferably, the dividing surface is already provided in the blank contour of the casting. This can further reduce the processing effort of the pressure piece.

[0031] As with the vehicle brake according to the invention, the pressure block and the brake caliper utilize the same advantages. Preferred embodiments of the vehicle brake are also preferred embodiments of the pressure block and the brake caliper and vice versa. In this respect, reference is made to the above-mentioned embodiments and their contents are taken into account here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Next, embodiments of the present invention are described in detail according to the accompanying drawings. They do not necessarily show embodiments to scale. Rather, the drawings used for explanation are implemented in a schematic and / or slightly distorted form. Reference is made to the relevant prior art in terms of supplementing the teachings that can be directly identified from the drawings. It is considered that many modifications and changes can be made to the form and details of the embodiments without departing from the general concept of the present invention. The features of the present invention disclosed in the specification, drawings and claims can be used individually or in any combination for the improvement of the present invention. In addition, all combinations of at least two features disclosed in the specification, drawings and / or claims fall within the scope of the present invention. The general concept of the present invention is not limited to the precise form or details of the preferred embodiments shown and described below or to the subject matter that is limited relative to the subject matter claimed in the claims. In the measurement range described, the values ​​within the mentioned boundaries are disclosed as boundary values ​​and can be used arbitrarily and claimed. For simplicity, the same parts or parts with the same or similar functions are provided with the same reference numerals below. Other advantages, features and details of the present invention are derived from the following description, the preferred embodiments and the following drawings.

[0033] Figure 1 A first exemplary embodiment of a vehicle brake according to the invention with a pressure piece according to the invention is shown in detail in a side view;

[0034] Figure 2 A brake caliper according to the invention according to a first embodiment of the invention is shown in detail in a perspective view;

[0035] Figure 3 A detailed perspective view of a pressure block according to the invention according to a first embodiment;

[0036] Figure 4 and 5 A detailed view and a schematic diagram showing in detail the outer contour of a pressure piece according to the invention according to a first embodiment;

[0037] Figure 6A second exemplary embodiment of a vehicle brake according to the invention with a pressure piece is shown in detail in a side view;

[0038] Figure 7 A brake caliper of a vehicle brake according to a second embodiment is shown in detail in a perspective view;

[0039] Figure 8 A compact according to a second embodiment of the present invention is shown in detail in a perspective view;

[0040] Fig. 9 , 10 A detailed view and a schematic diagram of a pressure piece guide according to a second exemplary embodiment of the invention are shown in detail. DETAILED DESCRIPTION

[0041] Figure 1 The vehicle brake 2 is shown having a brake caliper 4 equipped with a pressure piece guide 8 in which a pressure piece 6 is guided movably along an axis of movement 10. The pressure piece guide 8 is designed such that the pressure piece 6 has an outer contour 14 that corresponds to the recess 12 of the brake caliper 4.

[0042] exist Figure 2 In FIG. 4 , the brake caliper 4 is shown in a perspective view without the pressure piece 6. The pressure piece guide 8 is formed on the side of the brake caliper 4 by a recess 12. The recess 12 is formed in Figures 1 to 5 In the case of the embodiment shown in Figure 2 As shown in , it is substantially half-moon-shaped. Basically, the recess 12 and the brake caliper 4 as a whole correspond to the brake caliper 4 known from the prior art.

[0043] exist Figure 3 FIG. 1 shows the pressure piece 6 in three dimensions. The pressure piece 6 has a partial surface 16 in the region of the pressure piece outer contour 14. The partial surface 16 is formed in the present case by a contact surface 20, on which the pressure piece 6 is in contact with the recess 12 of the brake caliper 4, and by a separating surface 26, in the region of which there is no contact between the pressure piece 6 and the recess 12 of the brake caliper 4. The partial surface 16 is formed along the axis of movement 10 of the pressure piece 6 (see Figure 1 ) direction in the reference plane region 18. The dividing surface 26 of the pressure piece 6 has different, in this case at least sectionally opposite curvatures 30. The contact surface 20 of the pressure piece 6 has a convex curvature 22. By designing the contact surface 20, in particular by the targeted design of its convex curvature 22, the lateral guide play of the pressure piece guide 8 in the first and second directions is adjusted as independently of one another as possible according to the invention. In this case, the pressure piece 6 according to the invention can be used together with the brake caliper 4 with the recess 12 known from the prior art.

[0044] The contact surface 20 and the separation surface 26 are configured in Figure 4 and 5 Further details are given in Figure 4 The pressure piece 6 shown in FIG. 6 has a contact surface pair 32 , 32 ′ for lateral guidance of the pressure piece 6 in a first direction. By targeted dimensioning of the contact surface pair 32 , 32 ′, the lateral guide play with the pressure piece guide 8 in the first direction can be adjusted.

[0045] Furthermore, the pressure piece 6 has a second contact surface 34 for lateral guidance of the pressure piece 6 in the second direction. In other words, the pressure piece 6 is supported in the second direction by the second contact surface 34, wherein the lateral guide play with the pressure piece guide 8 in the second direction can be influenced by the targeted design of the second contact surface 34. A separation surface 26 for decoupling the contact surface is arranged between each contact surface 32, 32', 34.

[0046] As shown below Figure 5 As shown in Figure 5 The partial circle 24 with radius R1 and center C1 in the reference plane shown defines the contact surfaces 32, 32' of the first contact surface pair 32, 32'. The second contact surface 34 for guiding the pressure piece 6 in the second direction has a radius R2 and a second center C2. Preferably, the centers C1 and C2 are different from each other. Additionally or alternatively, the radii R1 and R2 are dimensioned differently from each other in terms of their size. A separating surface partial circle 28 with radius R3 is arranged between the partial circle 24 and the contact surface 20.

[0047] Figures 6 to 10 An alternative embodiment of a vehicle brake is shown, wherein Figures 1 to 5 In contrast to the exemplary embodiment shown in , a partial surface 116 is arranged in the recess 112 of the brake caliper 104 . In this exemplary embodiment, a pressure piece 106 known from the prior art can be used together with the brake caliper 104 .

[0048] Figure 6 In a known manner, a vehicle brake 102 is shown which has a brake caliper 104 in which a pressure piece 106 is mounted movably along a movement axis 110 by means of a pressure piece guide 108 . The brake caliper 104 has a recess 112 which substantially corresponds to an outer contour 114 of the pressure piece 106 .

[0049] Figure 7 The brake caliper 104 is shown in a perspective view with a pressure piece guide 108. The pressure piece guide 108 has a partial surface 116 which extends in the reference plane region 118 along the movement axis 110 (reference plane) of the pressure piece 106. Figure 1 )extend.

[0050] As in Figure 8As shown in FIG. 1 , in this exemplary embodiment, a pressure piece 106 known from the prior art with a substantially half-moon-shaped outer contour 114 can be used. Fig. 9 A detailed view of the brake caliper 104 is shown with a contact surface 120 and a separating surface 126, which form part of the pressure piece guide 108. The contact surface 120 also has a first contact surface pair 132, 132' for laterally guiding the pressure piece 106 in a first direction. The second contact surface 134 is used to laterally guide the pressure piece 106 in a second direction.

[0051] As in Fig.10 As can be seen in the figure, the contact surface 120 is formed by a partial circle 124. The contact surface has a concave curvature 136. Although the separating surface 126 is also formed by a partial circle 128, it has a curvature 138 that is different from the contact surface, so that when the pressure piece is installed in the brake, a spacing occurs in these areas between the pressure piece and the pressure piece guide. The contact surface 120 of the first contact surface 132, 132' has a radius R1' and a center C1'. The second contact surface 134 for laterally guiding the pressure piece 106 in the second direction has a radius R2' and a center C2'. Fig.10 In the exemplary embodiment shown, C1' and C2' are different from one another and R1' and R2' are different from one another. By deliberately influencing the centers of circle C1' and C2' as well as R1' and R2', it is possible to adjust the lateral guide play in the pressure piece guide 108 between the pressure piece 106 and the brake caliper 104 in the first direction and in the second direction as independently as possible.

[0052] The contact surface 120 is formed by a partial circle 124. The separation surface 126 is likewise formed by a partial circle 128. In the present case, the partial circle of the contact surface 124 transitions without interruption into the partial circle of the separation surface 128. The partial circle of the contact surface 124 has a concave curvature 136.

[0053] Reference numerals list

[0054] 2 Vehicle brakes

[0055] 4 Brake calipers

[0056] 6 Briquetting

[0057] 8. Pressure block guide

[0058] 10 Axis of motion

[0059] 12 recess

[0060] 14. Outer contour of the block

[0061] 16 Partial Face

[0062] 18 Reference plane area

[0063] 20 Contact surface

[0064] 22 Convex arched portion of the contact surface of the pressure block

[0065] 24 Partial circle of contact surface

[0066] 26 Dividing surface

[0067] 28 Partial circle of the dividing surface

[0068] 30 Concave curvature of the pressure block separation surface

[0069] 32, 32` The first contact surface for radially guiding the pressure block

[0070] 34 Second contact surface for tangentially guiding the pressure piece

[0071] 102 Vehicle brakes

[0072] 104 Brake caliper

[0073] 106 Briquetting

[0074] 108 block guide

[0075] 110 Movement axis

[0076] 112 concavity

[0077] 114 Block outer contour

[0078] 116 Partial surface

[0079] 118 Reference plane area

[0080] 120 contact surface

[0081] 124 Partial circle of contact surface

[0082] 126 Separation surface

[0083] 128 Partial circle of the dividing surface

[0084] 132, 132` A first contact surface for radially guiding the pressure block

[0085] 134 Second contact surface for tangentially guiding the pressure piece

[0086] 136 Concave arch of concave contact surface

[0087] 138 The convex arch of the concave contact surface

[0088] R1, R2, R3 Radius

[0089] C1, C2 center

[0090] R1`, R2`, R3` radius

[0091] C1`, C2` center

Claims

1. A vehicle brake (2, 102), said vehicle brake having Brake caliper (4, 104), a pressure piece guide (8, 108) arranged in the brake caliper (4, 104), and A pressure piece (6, 106) is guided along a movement axis (10, 110) in the pressure piece guide (8, 108), in, The pressure piece guide (8, 108) is configured as a recess (12, 112), and the pressure piece (6, 106) has an outer contour (14, 114) corresponding to the recess. It is characterized by: The pressure piece guide (108) and / or the outer contour (14) of the pressure piece are divided on both sides of the pressure piece (6) into a plurality of curved partial surfaces (16, 116) spaced apart from one another.

2. The vehicle brake (2, 102) according to claim 1, It is characterized by: The partial surface (16, 116) has a contact surface (20, 120) for supporting the pressure piece (6, 106) on the pressure piece guide (8, 108), wherein the contact surface (20, 120) extends at least partially in the direction of the movement axis (10, 110), And wherein the contact surface (20) on the pressure block (6) has a convex curvature (22) in a reference plane region (18, 118) perpendicular to the movement axis (10) of the pressure block (6) and / or the contact surface (120) on the recess (112) has a concave curvature (136) in the reference plane region (118).

3. The vehicle brake (2, 102) according to claim 2, It is characterized by: The concave curvature (136) and / or the convex curvature (22) are / is presented as a partial circle (24, 124) in the reference plane region (18, 118).

4. The vehicle brake (2, 102) according to claim 2 or 3, It is characterized by: The pressure piece guide (108) and / or the pressure piece (6) have a first contact surface pair (32, 32', 132, 132') for laterally guiding the pressure piece (6, 106) in a first direction and / or a second contact surface (34, 134) for laterally guiding the pressure piece (6, 106) in a second direction.

5. The vehicle brake (2, 102) according to claim 4, It is characterized by: At least one contact surface (20, 120) of the first contact surface pair (32, 32', 132, 132') is formed in the reference plane region (18, 118) by a partial circle segment (24, 124) having a first radius (R1) and a first center (C1), And / or the second contact surface (34, 134) is formed in the reference plane region (18, 118) by a partial circle segment (24, 124) having a second radius (R2) and a second center (C2).

6. The vehicle brake (2, 102) according to claim 5, It is characterized by: The first radius (R1) and the second radius (R2) are different from each other in their sizes.

7. The vehicle brake (2, 102) according to claim 5, It is characterized by: The first circle center (C1) and the second circle center (C2) are different from each other.

8. The vehicle brake (2, 102) according to claim 2, It is characterized by: A separating surface (26, 126) is arranged between the contact surfaces (20, 120).

9. The vehicle brake (2, 102) according to claim 8, It is characterized by: The separating surface (126) of the pressure piece guide (108) has a curvature (138) in the reference plane region (118) that differs from the curvature of the contact surface and / or the separating surface (26) on the pressure piece (6) has a curvature (30) in the reference plane region (18) that differs from the curvature of the contact surface.

10. Vehicle brake (2, 102) according to claim 8 or 9, It is characterized by: At least one separating surface (26, 126) is at least partially configured as a partial circle (28, 128) in the reference plane region (18, 118).

11. The vehicle brake (2, 102) according to claim 8, It is characterized by: The separating surface (26, 126) and the partial surface (16, 116) of the contact surface (20, 120) transition seamlessly into one another.

12. The vehicle brake (2, 102) according to any one of claims 1 to 3, It is characterized by: An intermediate section is arranged at the transition between two curved sections (22, 30, 136, 138).

13. The vehicle brake (2, 102) according to claim 1, It is characterized by: The vehicle brake is a commercial vehicle compressed air disc brake.

14. A pressure block (6) for a vehicle brake (2, 102), It is characterized by: The pressure piece (6) has an outer contour (14) which is divided into a plurality of mutually spaced partial surfaces (16). The partial surface (16) has a contact surface (20) for supporting the pressure piece (6) on the pressure piece guide (8), wherein the contact surface (20) extends at least partially in the direction of the pressure piece movement axis (10), And wherein, the contact surface (20) on the pressure block (6) has a convex curvature (22) in a reference plane region (18) perpendicular to the movement axis (10) of the pressure block (6).

15. The compact (6) according to claim 14, It is characterized by: The convex curvature (22) is embodied as a partial circle (24) in the reference plane region (18).

16. The compact (6) according to claim 14 or 15, It is characterized by: The pressure piece (6) has a first contact surface pair (32, 32') for laterally guiding the pressure piece (6) in a first direction and / or a second contact surface (34) for laterally guiding the pressure piece (6) in a second direction.

17. The compact (6) according to claim 16, It is characterized by: At least one of the contact surfaces (20) of the contact surface pair (32, 32') is formed in the reference plane region (18) by a partial circle segment (24) having a first radius (R1) and a first center (C1), And / or the second contact surface (34) is formed in the reference plane region (18) by a partial circle segment (24) having a second radius (R2) and a second center (C2).

18. The compact (6) according to claim 17, It is characterized by: The first radius (R1) and the second radius (R2) are different from each other in terms of their sizes and / or the first center (C1) and the second center (C2) are different from each other.

19. The compact (6) according to claim 14, It is characterized by: A separating surface (26) is arranged between the contact surfaces (20).

20. The compact (6) according to claim 19, It is characterized by: At least two curved sections (22, 30) transition seamlessly into one another, or an intermediate section is arranged at the transition between the two curved sections (22, 30).

21. The compact (6) according to claim 14, It is characterized by: The pressure piece is a pressure piece for a compressed air disc brake of a commercial vehicle.

22. The compact (6) according to claim 19, It is characterized by: The separating surface (26) on the pressure piece (6) has a concave curvature (30) in the reference plane region (18).

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