Brake pad spring and disc brake system

Abstract

This invention relates to brake block springs and disc brake systems. A brake block spring for at least one brake block, particularly for two brake blocks, wherein, for each of the at least one brake block, the brake block spring includes two opposing walls configured to receive a portion of the backing plate of the respective brake block between the two opposing walls and to guide the respective brake block between a non-braking position and a braking position. At least a portion of at least one of the two opposing walls is elastically movable, and the two opposing walls have at least segmented non-zero angles relative to each other, the distance between the two opposing walls decreasing from a first segment toward a second segment, so as to generate a return spring effect for the respective brake block from the braking position toward the non-braking position. A disc brake system includes a brake disc and brake block springs mounted on a bracket.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering, and more particularly to the field of vehicle brakes. Background Technology

[0002] In disc brake systems, reducing unwanted resistance during driving, i.e., when the brakes are not applied, has long been a subject of research and development. Previous solutions have not yielded entirely satisfactory results. They have failed to achieve “zero-resistance torque,” ​​and other drawbacks include, for example, long pedal travel, increased noise / vibration / harshness (NVH), or unwanted temperature dependence, making it difficult to achieve consistently good results for all driving conditions.

[0003] According to existing technology, brake pad springs are sometimes used to hold the brake pads and guide them between the braking and non-braking positions. Brake pad springs are typically mounted on a bracket (such as a brake caliper bracket) and have a recessed portion for receiving a portion of a backing plate of the brake pad. The backing plate slides within this recessed portion. These brake pad springs typically include a return spring for each of the brake pads. During braking, the backing plate presses against the return spring, and when the brake is released, the return spring helps to push the brake pad back to the initial non-braking position. Return springs are prone to failure; they can break and make assembly difficult. Summary of the Invention

[0004] In view of the prior art, the object of the present invention is to at least solve some of the problems mentioned above and / or provide a robust solution for reducing drag torque.

[0005] This is achieved by a brake block spring according to the invention. It is also achieved by a disc brake system according to the invention. Advantageous embodiments are shown in the following description and drawings.

[0006] Therefore, it is recommended that the brake block spring be used for at least one brake block, and particularly for two brake blocks. For each of the at least one brake block, the brake block spring comprises two opposing walls.

[0007] The brake block spring is configured as part of a backplate for receiving the corresponding brake block between two opposing walls and for guiding the corresponding brake block.

[0008] The brake block spring guides the brake block between the non-braking position and the braking position. In the non-braking position, the corresponding brake block is located in the first section of the opposing wall, and in the braking position, the brake block is located in the second section of the opposing wall.

[0009] At least a portion of at least one of the two opposing walls is elastically movable. The two opposing walls have non-zero angles relative to each other, at least in sections, with the distance between the two opposing walls decreasing from the first section toward the second section. This generates a return spring effect for the corresponding braking block from the braking position toward the non-braking position.

[0010] Therefore, the opposing walls can constitute a sliding surface for the brake block. At least when in the braking position, the portion of the brake block disposed between the opposing walls abuts against two of the opposing walls. Return movement to the non-braking position is achieved and / or assisted by the elastic mobility of at least one of the walls. In particular, at least one of the walls can be elastic. Elasticity or elastic mobility is provided such that when the brake block is in the braking position, at least one of the walls can elastically move outward, and during braking, the backplate pushes at least one of the walls outward. Due to the elasticity or elastic mobility of at least one wall, the at least one wall returns to its initial position after the braking pressure is released, thereby pushing the brake block back and away from the brake disc.

[0011] The restoring force generated by the interaction between the two opposing walls and the brake block typically acts primarily at the edge of the backplate, rather than on one of the main surfaces of the backplate. In contrast, a typical return spring according to the prior art would act on the main surface.

[0012] A reduction in the distance between the two opposing walls from the first segment to the second segment can be achieved by setting an angle for at least a portion of the circumferential outer walls of the two opposing walls and / or setting an angle for at least a portion of the circumferential inner walls of the two opposing walls. The reduced distance and non-zero angle can be achieved by having flat walls arranged at a constant angle. Alternatively, at least one of the walls can have a bend or twist, resulting in the angle being provided segmentally. A non-zero angle between the two opposing walls can be provided by including the slope of the first wall of the two opposing walls and / or by setting a slope for the second wall of the two opposing walls. The slope can be defined, for example, relative to the inner and / or outer edges of the brake block spring. Specifically, for example, to reduce the distance between the walls in the second segment, one or both of the walls can be arranged at an angle and / or can be curved and / or can have increased thickness and / or can contain additional material.

[0013] The disc braking system envisioned herein is a disc braking system that includes the brake pad springs described herein. The disc braking system may include a brake disc and brake pad springs, particularly brake pad springs according to any of the embodiments shown herein, the brake pad springs being mounted on a bracket. For example, the bracket may be a brake caliper support for the braking system.

[0014] A portion of the backing plate of the brake block is received between two opposing walls of the brake block spring for guiding the brake block between a non-braking position and a braking position. In the non-braking position, the brake block is located in the first section of the opposing wall and away from the brake disc, while in the braking position, the brake block is located in the second section of the opposing wall and abuts against the brake disc.

[0015] At least a portion of at least one of the two opposing walls is elastically movable, and the two opposing walls have non-zero angles relative to each other at least in sections, the distance between the two opposing walls decreasing from the first section toward the second section, such that the portion of the backplate received between the two opposing walls engages with the two opposing walls at the second section to generate a return spring effect for the brake block, enabling or assisting the movement of the brake block from the braking position toward the non-braking position.

[0016] It should be noted that although the brake block spring and the brake block interact to produce the return spring effect according to the invention, the features and advantages according to the invention can be readily seen in the brake block spring itself, for example, by examining the opposing walls and observing the angle or distance between the opposing walls.

[0017] The distance between the two opposing walls can be selected based on the dimensions of the brake block's backplate. For example, the distance between the two opposing walls in the first section can be at least 8 mm and / or at most 15 mm. From the first section to the second section, the distance between the two opposing walls can be reduced by at least 5% and / or at most 15%. Alternatively, the distance between the two opposing walls can be reduced by at least 1 mm or at least 2 mm and / or at most 4 mm or at most 3 mm. Alternatively, the angle between the two opposing walls can be at least 5 degrees and / or at most 8 degrees. For example, when both walls are constructed as flat walls arranged at a constant angle, these angles can be specifically set along the entire length of the walls. Alternatively, this type of angle can be set in a construction in which at least one of the walls has a twist, and the angle is set only for a portion of that wall.

[0018] In a possible configuration, at least one of the two opposing walls is curved. That is, at least one of the walls has a bend. The curved wall has a non-constant angle relative to the other wall along the length of the bend.

[0019] Brake block springs can be designed as stamped and / or bent metal parts.

[0020] Brake block springs can be additively manufactured components.

[0021] The brake block spring can be a separately connected, integrated component.

[0022] For example, brake pad springs may include metal, particularly steel and / or aluminum and / or copper. In particular, brake pad springs may include or be made of a metal plate.

[0023] Brake block springs may include polymers.

[0024] At least a portion of the two opposing walls may have a coating, such as a polytetrafluoroethylene coating, which is configured to engage with the respective brake block.

[0025] At least one of the two opposing walls may include two or more segments with different materials and / or different hardnesses. The materials and / or hardnesses may differ between the first and second segments, and / or the materials and / or hardnesses may differ within the first segment and / or within the second segment.

[0026] For example, the thickness of the two opposing walls can differ between the first and second sections. This thickness can increase or decrease from the first section toward the second section, and / or increase or decrease within the first and / or second sections. Specifically, this difference can vary by at least 0.1 mm and / or at most 0.3 mm. The thickness of the first and / or second section can, for example, be at least 0.4 mm and / or at most 1 mm.

[0027] Brake block springs may not require a return spring. Therefore, improved pedal feel and / or convenient installation of the brake block springs and / or brake blocks can be achieved.

[0028] The brake block spring can be configured to guide two brake blocks, namely an inner brake block and an outer brake block. For each of the two brake blocks, the brake block spring may include two opposing walls configured to accommodate a portion of the back plate of the respective brake block therebetween.

[0029] Specifically, for the inner and / or outer brake blocks, at least a portion of at least one of the two opposing walls may be elastically movable. Furthermore, for the inner and / or outer brake blocks, the two opposing walls may have a non-zero angle relative to each other, with the distance between the two opposing walls decreasing from a first segment toward a second segment, where the corresponding brake block is in a non-braking state and during braking it is located in the second segment, thereby generating a return spring effect for the corresponding brake block from the braking position toward the non-braking position.

[0030] In a braking system, the gap between the friction layers of the brake disc and brake pads in the non-braking position can be, for example, at least 0.05 mm and / or at most 0.12 mm. The travel can be, for example, at least 0.05 mm and / or at most 0.12 mm.

[0031] The disc brake system may also include a second brake block spring, which is opposite to the aforementioned brake block spring (in this case, the aforementioned brake block spring constitutes the first brake block spring). The second brake block spring is used to hold a second portion of the backing plate and to guide the brake block in cooperation with the first brake block spring, the second portion being opposite to the portion of the backing plate of the corresponding brake block that is received between the two opposing walls of the first brake block spring. Attached Figure Description

[0032] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0033] Figure 1a and Figure 1b Parts of the braking system are shown;

[0034] Figure 2a The portion of the brake block spring and the back plate of the brake block installed inside the brake block spring is shown;

[0035] Figure 2b The position of the brake block within the brake block spring according to the prior art is schematically shown;

[0036] Figure 2c A perspective view of a brake block spring according to the prior art is shown;

[0037] Figure 2d The position of the brake block within the brake block spring according to the invention is schematically shown;

[0038] Figure 2e A perspective view of the brake block spring according to the present invention is shown;

[0039] Figure 3a The position of the brake block within the brake block spring according to the invention is schematically shown in the non-braking state;

[0040] Figure 3b The braking system in the non-braking state is shown;

[0041] Figure 3c The position of the brake block within the brake block spring according to the invention is schematically shown in the braking state;

[0042] Figure 3d The braking system in the non-braking state is shown;

[0043] Figure 4a The diagram schematically illustrates a brake block spring according to the prior art in the case of two brake blocks;

[0044] Figure 4b It shows Figure 4a The cut shown;

[0045] Figure 5a The brake block spring according to the invention is schematically shown in the case of having two brake blocks;

[0046] Figure 5b It shows Figure 5a The cut shown;

[0047] Figures 5c to 5g Other embodiments of the brake block spring according to the present invention are shown;

[0048] Figure 6a The brake block spring according to the invention is schematically shown in the case of having two brake blocks; and

[0049] Figures 6b to 6g The enlarged view shows different implementations of the wall of the brake block spring.

[0050] List of reference numerals

[0051] 1. Brake block spring

[0052] 2, 2' Brake block

[0053] 3' Backplate

[0054] 4, 4' Friction Layer

[0055] 5. Brake disc

[0056] 6. Brake calipers

[0057] 7 Brake caliper bracket

[0058] 8 pistons

[0059] 9. First wall (circumferential outer wall)

[0060] 10. Second wall (circumferential inner wall)

[0061] 11, 11' Retraction Spring

[0062] 12, 12' Sliding surfaces of brake blocks

[0063] 13 Transverse walls

[0064] A. Non-braking position

[0065] B Braking position

[0066] S1 First Section

[0067] S2 Second Section Detailed Implementation

[0068] Figure 1aA braking system is shown, comprising a brake disc 5 and two brake pads 2, 2', which are held by a brake caliper 6. Each brake pad 2, 2' has a backing plate 3, 3' and a friction layer 4, 4'. The backing plates 3, 3' are mounted on the brake caliper 6, which will... Figure 1b The following further explains: The brake caliper 6 includes a piston 8, which presses the brake pads 2 against the brake disc 5 during braking. After braking, the brake pads 2, 2' must retract away from the brake disc 5. Residual resistance after braking should be avoided. For example, the retraction of the brake pads 2, 2' is achieved at least in part by the elasticity of the seals on the piston 8.

[0069] Figure 1b It shows Figure 1a The brake caliper 6 has a brake caliper bracket 7. A brake block spring 1 is mounted on the brake caliper bracket 7. A transverse portion of the back plate 3 is received within a recessed portion of the brake block spring 1. Therefore, the brake block 2 is slidably arranged within the recessed portion and can move in the direction indicated by the arrow to perform braking. A second brake block 2' can be mounted within the brake block spring 1, opposite to the brake block 2 shown in the figure. As will be further explained below, the brake block spring 1 has two opposing walls 9, 10 for each of the back plates 3, 3', with the transverse portions of the corresponding back plates 3, 3' arranged between these two opposing walls 9, 10.

[0070] Figure 2a A portion of the back plate 3 of the brake block 2 is shown in an enlarged view, including the lateral portion of the back plate 3 received within the brake block spring 1. Therefore, Figure 2a A view of the inner main surface of the backplate 3 is depicted, facing the brake disc. A transverse portion is received within a recessed portion of the brake block spring 1, and this transverse portion is surrounded by a first wall 9 (circumferential outer wall), a second wall 10 (circumferential inner wall), and a transverse wall 13. These three walls 9, 10, and 13 define the recessed portion of the brake block spring 1. During braking, the brake block slides between these walls 9, 10, and 13, entering and exiting the paper. Specifically, when the brake is applied, the brake block 2 moves out of the paper toward the observer. The return spring 11 is arranged such that when the brake block 2 moves out of the paper toward the observer for braking, the return spring 11 is under tension. When the braking pressure is no longer applied, the return spring 11 pushes the brake block 2 back to the non-braking position. The return spring 11 may be disadvantageous. According to this application, alternative or additional means for pushing the brake block 2 back to the non-braking position are contemplated, i.e., the walls 9 and 10 are angled, as will be further described below.

[0071] Figure 2b by Figure 2aThe cross-sectional view AA shown illustrates the brake block spring 1 according to the prior art. Two opposing walls 9 and 10 are parallel to each other. When the brake is applied, the brake block moves from the first segment S1 to the second segment S2 in the direction indicated by the arrow, placing the return spring 11 under tension. After braking, the return spring 11 is required to move the brake block 2 back to its initial position.

[0072] Figure 2c It is a three-dimensional drawing of the brake block based on existing technology (such as...) Figure 2b As shown in the diagram. As indicated by the parallel lines, opposing walls 9 and 10 are parallel to each other.

[0073] Figure 2d by Figure 2a The cross-sectional view AA shown in the figure illustrates the brake block according to the invention. The brake block spring has two opposing walls 9 and 10, which are configured to accommodate a portion of the back plate 3 of the corresponding brake block 2 therebetween. The brake block spring guides the corresponding brake block 2 between a non-braking position and a braking position, in which the corresponding brake block 2 is located at a first section S1 of the opposing walls 9 and 10, and in the braking position, the brake block 2 is located at a second section S2 of the opposing walls 9 and 10. That is, when the brake is applied, the brake block 2 and its back plate 3 move to the right, as indicated by the arrow.

[0074] At least a portion of at least one of the two opposing walls 9 and 10 is elastically movable. (As from...) Figure 2d As can be seen, the two opposing walls 9 and 10 have a non-zero angle relative to each other. The distance between the two opposing walls 9 and 10 decreases from the first segment S1 toward the second segment S2. Due to the decrease in distance, and due to the elasticity of at least one of the two opposing walls, when the brake is applied, the wall arrangement is placed under tension, and the brake block moves to the right. This generates a return spring effect for the corresponding brake block 2 from the braking position B toward the non-braking position A. Once the brake is released, the opposing walls 9 and 10 assist in a retraction movement from right to left. Therefore, in such a configuration, the return spring 11 is optional.

[0075] Figure 2e A perspective view of the brake block according to the present invention is shown (e.g.) Figure 2d As shown in the diagram. As the non-parallel lines indicate, opposing walls 9 and 10 are at a non-zero angle relative to each other.

[0076] exist Figure 2d and Figure 2e In the brake block spring 1 shown, the distance between the two opposing walls 9 and 10 is reduced by 5% to 15%. In absolute terms, the reduction in distance can be, for example, between 1 and 4 mm or between 2 and 3 mm. The angle between the two opposing walls 9 and 10 is between 5 and 8 degrees.

[0077] Brake block spring 1 is a one-piece component, designed as a stamped and bent metal part. Brake block spring 1 is made of sheet metal and includes steel and / or aluminum and / or copper.

[0078] The two opposing walls 9 and 10 are configured to engage with the brake block 2, at least a portion of which has a coating, particularly a polytetrafluoroethylene coating.

[0079] Figures 3a to 3d The function of the brake block spring 1 according to the present invention is explained again. Figure 3a and Figure 3b A portion of the braking system in a non-braking state is shown, and Figure 3c and Figure 3d The same part is shown in the braking state. Figure 3a and Figure 3c It shows the previous use Figure 2b and Figure 2d A sectional view. Figure 3b and Figure 3d The diagram shows the representation of brake block 2 relative to brake disc 5.

[0080] In non-braking state ( Figure 3a and Figure 3b The portion of the backplate 3 located between the two opposing walls 9 and 10 is situated at the first section S1 of the two opposing walls 9 and 10 (refer to...). Figure 3a Within the first section S1, the distance between the two opposing walls 9 and 10 allows the back plate 3 to be received between the two opposing walls without deformation. In the non-braking position A, the gap between the brake disc 5 and the friction layer 4 of the brake block 2 is between 0.05 mm and 0.12 mm. If the brake is applied, the brake block 2... Figure 3a Move in the direction indicated by the middle arrow.

[0081] In braking state ( Figure 3c and Figure 3d The portion of the backplate 3 located between the two opposing walls 9 and 10 is pushed into the second section S2 of the two opposing walls 9 and 10 (see reference). Figure 3c Then, friction layer 4 is pressed onto brake disc 5 (see reference). Figure 3d ). For example from Figure 3cAs can be seen, in the braking position, the portion of the backplate 3 located between the two opposing walls 9 and 10 pushes against them, causing the walls 9 and 10 to move elastically away from each other. Due to the elastic mobility of the walls 9 and 10, they yield to the backplate 3. Once braking pressure is no longer applied, the elasticity provided to the two opposing walls 9 and 10 forces them back towards each other, exerting pressure on the backplate 3 and pushing it to the left and away from the brake disc, as indicated by the arrow. This restoring force is typically aided by the elasticity of the piston seals.

[0082] It should be noted that, Figure 3a and Figure 3c This is an enlarged drawing. Typically, the stroke of brake block 2 (therefore, as shown) Figure 3a and Figure 3c The left and right movement of brake block 2 shown is small. It should be noted that, according to the invention, during braking, brake block 2 does not necessarily need to completely move out of section S1 and completely into section S2. It is only required that the brake block be displaced such that it at least partially enters section S2, where the distance between the walls in section S2 is reduced.

[0083] As from Figure 3a and Figure 3b As can be seen, brake block spring 1 does not have a return spring 11.

[0084] Figure 4a A brake block spring 1 according to the prior art is shown with two brake blocks 2, 2'. The brake block spring 1 includes a first wall 9 circumferentially outer and a second wall 10 circumferentially inner. Both walls are flat and arranged parallel to each other, forming parallel sliding surfaces for the back plates 3, 3' of the brake blocks 2, 2'. During braking, the sliding surfaces 12 of the back plates 3, 3' of the brake blocks 2, 2' slide along the walls 9, 10. When the brake is applied, the two brake blocks 2, 2' move inward. There is no recoil effect caused by the walls 9, 10.

[0085] Figure 4b For example Figure 4a The cross-sectional view BB shown illustrates a brake block spring 1 according to the prior art. When the brake is applied, the back plate 3 moves toward the observer and slides between the upper first wall 9 and the lower second wall 10 of the brake block spring 1 without elastic deformation or movement of the walls 9 and 10.

[0086] Figure 5aA brake block spring 1 according to the invention is shown with two brake blocks 2, 2'. The brake block spring 1 includes a first wall 9 circumferentially outer and a second wall 10 circumferentially inner. The brake block spring 1 is configured to guide the two brake blocks 2, 2'. Two opposing walls 9, 10 are provided for each of the two brake blocks 2, 2'. The two opposing walls 9, 10 are configured to accommodate a portion of the back plate 3, 3' of the brake blocks 2, 2' therebetween.

[0087] During braking, the sliding surfaces 12 of the back plates 3 and 3' of the brake blocks 2 and 2' slide along the walls 9 and 10. When the brake is applied, the two brake blocks 2 and 2' move inward, in each case from segment S1 of the walls 9 and 10 toward segment S2. Both walls 9 and 10 include kinks for each of the brake blocks 2. Due to the kinks, the walls are segmentally at non-zero angles relative to each other, and the distance between the upper wall 9 and the lower wall 10 decreases in segment S2 compared to segment S1. As the brake blocks 2 move toward segment S2, the walls 9 and 10 elastically deform by the brake blocks 2 and are pushed away from each other, resulting in the accumulation of spring tension within the walls 9 and 10. After the braking pressure is released, the return movement of the two brake blocks 2 and 2' from their respective segments S2 to their respective segments S1 is assisted by the force induced by the walls 9 and 10, which, due to their elasticity, strive to return to their initial state. Therefore, there is a retraction effect caused by the walls 9 and 10.

[0088] exist Figure 5a In the case shown, both the upper wall 9 and the lower wall 10 have a connecting intermediate section, which is centrally located between the two brake blocks 2, 2'. In the neutral position, this intermediate section bends inward relative to the remaining outer sections to reduce the distance between the two walls for the second section S2. The connecting intermediate section represents the elastically movable portion of walls 9, 10. The elastically movable intermediate section forms a centrally connected spring arrangement, causing a retraction effect on the two brake blocks 2. As will be explained below, in Figures 5c to 5g In this context, different settings can be selected for the elastically movable parts. That is, different types of spring arrangements can be formed by means of walls 9 and 10, such as non-connected springs, single-sided springs that act only on one of the brake blocks 2 and 2', or spring arrangements on only one of walls 9 and 10.

[0089] Figure 5b For example Figure 5a The cross-sectional view BB shown illustrates the brake block spring 1 according to the invention. When the brake is applied, the back plate 3 moves toward the observer, slides between the upper first wall 9 and the lower second wall 10 of the brake block spring 1, and pushes the walls apart.

[0090] Figure 5cThis illustrates a centrally connected spring arrangement for the brake block spring 1 according to the invention, which is related to... Figure 5a The spring arrangement is similar. An elastically movable portion is provided only on the first wall 9 on the outer circumferential direction, while the second wall 10 on the inner circumferential direction is flat. The spring effect caused by the brake block spring 1 is generated by the elastic mobility of the central wall section of the first wall 9. This spring effect acts on the two brake blocks 2, 2'.

[0091] Figure 5d The spring arrangement of the brake block spring 1 according to the invention is shown. Each wall 9, 10 includes two separate elastically movable portions, and each brake block 2, 2' has one elastically movable portion.

[0092] Figure 5e The spring arrangement of the brake block spring 1 according to the invention is shown. The top wall 9 includes two separate elastically movable portions, one for each brake block 2, 2'. The bottom wall 10 is flat.

[0093] Figure 5f The spring arrangement of the brake block spring 1 according to the invention is shown. Both walls 9 and 10 include elastically movable portions, which in each case are used only for one of the brake blocks. In this way, the retraction of only one of the brake blocks is assisted by the elasticity provided for the walls 9 and 10. This can be achieved only for the inner brake block 2' or only for the outer brake block 2.

[0094] Figure 5g Different versions of the resiliently movable portion are illustrated exemplarily. On the left side, for the first brake block 2 and therefore the first backplate 3, the upper wall 9 has an angled portion, and the lower wall 10 has an angled portion. They differ from each other in both angle and position. The angled portion of the upper wall is positioned further inward, and the angled portion of the lower wall extends into the first segment S1. The angled portion of the lower wall 10 has a steeper angle compared to the angled portion of the upper wall 9.

[0095] On the right side, both the upper wall 9 and the lower wall 10 have angled portions for the second brake block 2' and the second back plate 3'. The upper wall 9 has an increased thickness in the second section S2. The lower wall 10 includes an elastically movable portion extending within the section S2, which has an increased thickness compared to the first section S1.

[0096] Understandable, Figure 5g Different variants and Figures 5a to 5f All implementations and variations can be combined with each other. They can also be combined with... Figures 6a to 6g The implementation methods shown are combined.

[0097] Figure 6aAgain shown is the brake block spring 1 according to the invention, which has resiliently movable portions for the two walls 9, 10 and, in each case, for the two brake blocks 2, 2'. Figure 6a This should be considered as an overview. Figure 6a The enclosed sections include a first section S1 and a second section S2 for the upper wall 9 and for one of the brake blocks. Within the enclosed area, the upper wall 9 includes bends or twists to achieve a non-zero angle between the partitions of the two walls 9, 10 and a reduced distance between the walls 9, 10 in section S2. Figures 6b to 6g The circled section is shown in magnification, illustrating different options for providing the aforementioned twist or bend and distance reduction. It is understood that... Figures 6b to 6g The options shown can also be used for non-connected movable elements, such as... Figures 5d to 5f As shown in the image.

[0098] Figure 6b A wall 9 with a twist is shown, and the thickness of the wall differs between a first section S1 and a second section S2, decreasing by 0.1 to 0.3 mm in the second section. The resilient mobility may be due to the elasticity of a thinner portion of the wall 9 extending within section S2. In this case, the thinner portion of the wall represents at least a portion of the resiliently movable portion of the upper wall 9. It is possible that both the thicker and thinner portions of the wall are elastically and / or elastically mounted, in which case both constitute the resiliently movable portion.

[0099] Figure 6c A wall 9 with twists is shown, and the thickness of this wall differs between a first section and a second section, decreasing in thickness in the second section. Furthermore, in Figure 6c In this case, the material of the thinner, angled portion differs from the material of the thicker portion extending within the first segment S1. This type of brake block spring 1, having two or more materials, can be produced by additive manufacturing to form a single connecting piece. The different segments of the brake block spring 1 may include metals, particularly steel and / or aluminum and / or copper, and / or polymers.

[0100] Figure 6d A tortuous wall 9 is shown, with its thickness varying between a first and a second section, decreasing in the second section. The angled, thinner portions of wall 9 comprise three different materials, each with varying hardness and elasticity. The materials can be selected to achieve a constant linear hardness value and / or ensure independent wear.

[0101] Different sections of the brake block spring 1 may include metal, particularly steel and / or aluminum and / or copper, and / or polymer.

[0102] Figure 6e A wall 9 with reduced thickness is shown in the second section S2, wherein the wall is curved to provide a non-zero angle and reduced distance in the second section S2. The wall has a downward bend that is recessed on its underside facing another wall 10.

[0103] Figure 6f A wall with reduced thickness is shown in the second section, wherein the wall is curved to provide a non-zero angle and reduced distance in the second section S2. The wall has a bend that is convex on the underside facing another wall 10.

[0104] Figure 6g A wall 9 with a reduced thickness is shown in the second section S2, wherein there is a twist between the first section S1 and the second section S2. The second section S2 is formed by a wall portion made of a different material than the wall portion of the first section S1. The two different materials are connected to each other by means of a fastening device.

Claims

1. Brake pad spring for at least one brake pad, wherein The brake pad spring comprises, for each of the at least one brake pad, two opposing walls configured for receiving a portion of a back plate of the respective brake pad between the two opposing walls and for guiding the respective brake pad between a non-braking position, in which the respective brake pad is located at a first section of the opposing walls, and a braking position, in which the brake pad is located at a second section of the opposing walls, wherein at least a portion of at least one of the two opposing walls is resiliently movable, and wherein the two opposing walls each have an angled portion protruding towards each other and the angled portions have an inclination such that a thickness increases from the first section to the second section, in order to generate a return spring effect for the respective brake pad from the braking position towards the non-braking position, wherein the angle of the angled portions formed on the two opposing walls is different.

2. The brake pad spring of claim 1, wherein, The distance between the two opposing walls is reduced by at least 5% and / or at most 15% and / or at least 1 mm or at least 2 mm and / or at most 4 mm or at most 3 mm, and / or wherein the angle between the two opposing walls is at least section-wise at least 5 degrees and / or at most 8 degrees.

3. The brake pad spring of claim 1, wherein, At least one of the two opposing walls is curved in order to at least section-wise provide the angled portion between the two opposing walls.

4. The brake pad spring of claim 1, wherein, The brake pad spring is designed as a stamped and / or bent metal part, or wherein the brake pad spring is an additively manufactured part.

5. The brake pad spring of claim 1, wherein, The brake pad spring is a one-piece part.

6. The brake pad spring of claim 1, wherein, The brake pad spring comprises a metal, and / or wherein the brake pad spring comprises a polymer.

7. The brake pad spring of claim 1, wherein, At least a portion of the two opposing walls configured for engaging with the respective brake pad has a coating.

8. The brake pad spring of claim 1, wherein, At least one of the two opposing walls comprises two or more sections having a different material from each other and / or a different hardness from each other.

9. The brake pad spring of claim 1, wherein, For at least one of the two opposing walls, a wall thickness within the first section is different from a wall thickness within the second section, the wall thickness within the first section being greater or smaller than the wall thickness within the second section.

10. The brake pad spring of claim 1, wherein, The brake pad spring is free of a return spring.

11. The brake pad spring of claim 1, wherein, The increase in thickness of the two opposing walls from the first section to the second section is provided by angling at least one section of a circumferential outer wall of the two opposing walls and / or angling at least one section of a circumferential inner wall of the two opposing walls.

12. The brake pad spring of claim 1, configured for guiding two brake pads, an inner brake pad and an outer brake pad, wherein, The two opposing walls are configured for receiving a portion of a back plate of the respective brake pad between the two opposing walls, and wherein, for the inner brake pad and / or the outer brake pad, At least one of the two opposite walls has at least one portion that is resiliently movable, and the two opposite walls have at least in sections a non-zero angle with respect to each other, the distance between the two opposite walls decreasing from the first section towards the second section in order to create a return spring effect for the respective brake pad from the braking position towards the non-braking position.

13. A disc brake system comprising a brake disc and a brake pad spring mounted on a carrier, wherein a portion of a back plate of a brake pad is received between two opposite walls of the brake pad spring for guiding the brake pad between a non-braking position, in which the brake pad is located at a first section of the opposite walls and away from the brake disc, and a braking position, in which the brake pad is located at a second section of the opposite walls and in which the brake pad abuts against the brake disc, wherein at least one of the two opposite walls has at least one portion that is resiliently movable, and wherein the two opposite walls each have an angled portion protruding towards each other and the angled portions have an inclination such that the thickness increases from the first section towards the second section, such that the portion of the back plate received between the two opposite walls engages at the second section with the angled portion formed in each of the two opposite walls in order to create a return spring effect for the brake pad, enabling or assisting the movement of the brake pad from the braking position towards the non-braking position, wherein the angles of the angled portions formed on the two opposite walls are different.

14. The disc brake system of claim 13, wherein, In the non-braking position, the gap between the brake disc and the friction layer of the brake pad is at least 0.05 mm and / or at most 0.12 mm. In the non-braking position, the gap between the brake disc and the friction layer of the brake pad is at least 0.05 mm and / or at most 0.12 mm.

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