Brake pad back plate and brake pad
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BWI (SHANGHAI) CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-06-16
Smart Images
Figure CN224364290U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive braking technology, and more specifically, to a brake pad backing plate and a brake pad. Background Technology
[0002] Automotive brake calipers mainly include single-piston calipers, dual-piston calipers, and even four-piston calipers. When the driver presses the brake pedal, the brake caliper engages the brake pads to achieve the braking effect. Brake pads mainly consist of friction pads and a backing plate that supports the friction pads. Currently, in automotive braking systems using single-piston calipers, there is a problem of uneven wear on the brake pads, which reduces the vehicle's braking performance and can lead to safety hazards. Utility Model Content
[0003] The main objective of this application is to provide a brake pad backing plate and brake pads to solve the problem of uneven wear of brake pads in automotive braking systems using single-piston calipers in the prior art.
[0004] According to one aspect of this application, a brake pad backing plate is provided, comprising:
[0005] The back panel body includes a first region and a second region. The first region is located in the middle of the back panel body, and the second region surrounds the outer edge of the first region. Along the length direction of the back panel body, the first region includes a first side and a second side.
[0006] A rigid reinforcement structure is disposed in the second region and is located at least on the first side and the second side.
[0007] Optionally, along the thickness direction of the backplate body, the backplate body includes a first surface and a second surface, and the rigidity reinforcement structure includes:
[0008] The rib protrudes from the first surface; and / or,
[0009] Along the thickness direction of the backplate body, the first region has a first thickness, which is not less than 7 mm.
[0010] Optionally, the raised ribs include multiple ribs arranged at intervals along the circumference of the first region.
[0011] Optionally, the rib extends from the outer edge of the first region to the outer edge of the second region away from the first region.
[0012] Optionally, the rib includes:
[0013] The first rib, comprising at least three ribs, is located on the first side and is spaced apart from each other circumferentially along the first region; and / or
[0014] The second rib includes at least three ribs, which are located on the second side and are spaced apart from each other along the circumference of the first region.
[0015] Optionally, along the width direction of the back panel body, the first region further includes a third side and a fourth side, and the rib further includes:
[0016] The third rib, comprising at least three ribs, is located on the third side and spaced apart from each other circumferentially along the first region; and / or
[0017] The fourth rib includes at least three ribs, which are located on the fourth side and are spaced apart from each other along the circumference of the first region.
[0018] Optionally, along the thickness direction of the backplate body, the projected outer contour of the first region is circular; and / or,
[0019] Along the thickness direction of the backplate body, the thickness of the second region is not greater than the thickness of the first region.
[0020] Optionally, the second region has a second thickness along the thickness direction of the back plate body, and the second thickness gradually decreases in the direction away from the first region.
[0021] Optionally, the rib has a third thickness along the thickness direction of the back plate body, wherein:
[0022] The third thickness is smaller on the side closer to the first region than on the side farther from the first region; and / or,
[0023] The third thickness gradually increases in a direction away from the first region; and / or;
[0024] Along the thickness direction of the back plate body, the surface of the rib away from the second region is not higher than the surface of the first region.
[0025] On the other hand, this application also provides a brake pad, comprising:
[0026] The brake pad backplate, along the thickness direction of the backplate body, the backplate body includes a first surface and a second surface;
[0027] Friction block, the friction block being disposed on the second surface.
[0028] In this application, the brake pad backplate includes a backplate body and a rigid reinforcement structure. Along the length of the backplate body, a first region in the middle of the backplate body includes a first side and a second side. The rigid reinforcement structure is disposed in the second region of the backplate body and is located at least on the first and second sides. Because the rigid reinforcement structure is disposed in the second region located on the outer periphery of the first region, this structure can enhance the structural rigidity of the second region, thereby improving the overall rigidity of the backplate. Therefore, when a brake pad with this backplate is installed on a caliper, and the caliper piston contacts the first region to push the brake pad, after the first region is subjected to force, the rigid reinforcement structure can not only suppress the deformation of the first region after being subjected to force, but also prevent the portion of the second region located at least on the first and second sides of the first region from having a tendency to "lift" away from the brake disc. This reduces the pressure difference between the second region and the first region, and makes the force on the portion of the second region located on the first and second sides of the first region more uniform, thereby preventing uneven wear of the friction blocks on the brake pad. Attached Figure Description
[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0030] Figure 1 This is a schematic diagram of the structure of the brake pad backing plate provided in an exemplary embodiment of this disclosure;
[0031] Figure 2 for Figure 1 The main view;
[0032] Figure 3 for Figure 2 AA section view;
[0033] Figure 4 This is a schematic diagram of the structure of the brake pad provided in an exemplary embodiment of this disclosure;
[0034] Figure 5 This is a schematic diagram of the structure of the second surface of the brake pad backing plate;
[0035] Figure 6 This is a schematic diagram of the friction block structure.
[0036] The above figures include the following reference numerals:
[0037] 10. Back panel main body; 11. First area; 111. First side; 112. Second side; 113. Third side; 114. Fourth side; 12. Second area; 13. First surface; 14. Second surface.
[0038] 20. Rigidly reinforced structure; 201. Raised rib; 21. First raised rib; 22. Second raised rib; 23. Third raised rib; 24. Fourth raised rib.
[0039] 30. Friction block.
[0040] 40. Connecting structure; 41. Protruding column; 42. Groove. Detailed Implementation
[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0044] Currently, in automotive braking systems using single-piston calipers, the pressure applied to the backplate by the single-piston caliper is prone to unevenness. For example, when a single-piston EMB (Electro-Mechanical Brake) caliper is fitted to a vehicle weighing over 3000 kg, the brake pad friction block 30 needs to have a larger area and longer length. Consequently, the backplate for mounting the friction block 30 is also longer, and the overall thickness of the backplate is uniform. During braking, the area of the piston acting on the center of the backplate is smaller. Therefore, along the length of the backplate, the force applied by the piston to the center of the backplate is larger, and under conditions of deformation (e.g., a force of 50KN to 60KN, where KN is a unit of force measurement kilonewton), the opposite sides of the backplate along its length tend to "tilt" away from the brake disc. This results in a significant difference between the force on the opposite sides of the backplate along its length and the force on the center. Therefore, the pressure on both sides of the friction block 30 along its length is uneven. The wear on the area of the friction block 30 located in the middle of the back plate will be greater than the wear on the edge, resulting in uneven wear of the brake pads.
[0045] To address the aforementioned issues, the first embodiment of this application provides a brake pad backing plate, please refer to [link to relevant documentation]. Figures 1 to 3 The brake pad backplate includes a backplate body 10 and a rigidity reinforcement structure 20. The backplate body 10 includes a first region 11 and a second region 12. The first region 11 is located in the middle of the backplate body 10 to be adapted to abut against the piston of the caliper. The second region 12 surrounds the outer edge of the first region 11. Along the length direction of the backplate body 10 (e.g., Figure 1 (in the direction indicated by the middle arrow X), the first region 11 includes a first side 111 and a second side 112.
[0046] The rigid reinforcement structure 20 is disposed in the second region 12 and is located at least on the first side 111 and the second side 112. The rigid reinforcement structure 20 can enhance the overall structural rigidity of the backing plate. During vehicle braking, the backing plate is less likely to deform when subjected to the pressure of the caliper piston. Moreover, it can also prevent the portion of the second region 12 of the backing plate located on the first side 111 and the second side 112 of the first region 11 from "lifting up". This makes the force on the second region 12 more uniform and the force difference relative to the first region 11 smaller, thereby avoiding uneven wear of the brake pad friction block 30 due to localized greater wear.
[0047] As can be seen, in this application, the brake pad backplate includes a backplate body 10 and a rigidity reinforcement structure 20. Along the length direction of the backplate body 10, the first region 11 in the middle of the backplate body 10 includes a first side 111 and a second side 112. The rigidity reinforcement structure 20 is disposed in the second region 12 of the backplate body 10 and is located at least on the first side 111 and the second side 112. Since the rigidity reinforcement structure 20 is disposed in the second region 12 located on the outer periphery of the first region 11, this structure can enhance the structural rigidity of the second region 12, thereby improving the rigidity of the entire backplate. Therefore, when the brake pad with the backplate is installed on the caliper, and the caliper piston contacts the first region 11 to push the brake pad, after the first region 11 is subjected to force, the rigidity enhancement structure 20 can not only suppress the deformation of the first region 11 after being subjected to force, but also make the portion of the second region 12 located at least on the first side 111 and the second side 112 of the first region 11 less likely to "lift" away from the brake disc, thereby reducing the difference between the pressure on the second region 12 and the pressure on the first region 11, and making the force on the portion of the second region 12 located on the first side 111 and the second side 112 of the first region 11 more uniform, thereby avoiding uneven wear of the friction block 30 on the brake pad.
[0048] Along the thickness direction of the back panel body 10 (e.g.) Figure 1 (In the direction indicated by the middle arrow Y), the backplate body 10 includes a first surface 13 and a second surface 14, the second surface 14 for mounting the friction block 30 of the brake pad. The rigidity reinforcement structure 20 provided in this application includes a rib 201, which protrudes from the first surface 13. The rib 201 is easy to process, which can reduce the processing difficulty of the brake pad backplate, thereby improving the production efficiency of the backplate.
[0049] In other embodiments of this application, the rigid reinforcement structure 20 may further include a mesh-like reinforcement structure composed of multiple intersecting ribs 201, or a mesh-like or dot-matrix-distributed reinforcement protrusion structure composed of multiple protrusions. The rigid reinforcement structure 20 may also be a rigid member filling a cavity provided in the second region 12.
[0050] Currently, the thickness of backplates is typically between 5.4 mm and 6.3 mm, which is relatively thin and results in significant deformation under heavy stress. In this application, however, along the thickness direction of the backplate body 10, the first region 11 has a first thickness (e.g., ...). Figure 3 The thickness (indicated by h1) is not less than 7 mm. This first thickness makes the first region 11 more rigid and less prone to deformation under stress, thus reducing the risk of uneven wear on the friction block 30.
[0051] In some embodiments of this application, the first thickness may include one of 7mm, 7.1mm, 7.5mm, 8mm, 8.1mm, 8.3mm, 8.5mm, 8.7mm, 9mm, 9.1mm, or any other thickness value greater than 7mm.
[0052] The ribs 201 in this application include multiple ribs arranged at intervals along the circumference of the first region 11 (i.e., the circumferential direction of the first region 11 when the first region 11 is a circular region). Therefore, this embodiment further enhances the overall structural rigidity of the back plate by providing multiple mutually spaced ribs 201, making the pressure distribution of the piston applied to the first region 11 and the second region 12 of the back plate more uniform.
[0053] The rib 201 extends from the outer edge of the first region 11 to the outer edge of the second region 12 away from the first region 11. Thus, the rib 201 acts as a "force transmission bridge" between the outer edges of the first region 11 and the second region 12. During vehicle braking, the rib 201 of the rigid backplate can transmit the pressure received in the first region 11 in the middle of the backplate to the edge of the second region 12 away from the first region 11, preventing pressure from accumulating in the first region 11 and improving the pressure distribution at the outer edge of the second region 12. In particular, it makes the pressure on the portion of the second region 12 located on the first side 111 and the second side 112 of the first region 11 more uniform, reducing uneven wear caused by pressure concentration. Simultaneously, when multiple ribs 201 are spaced apart circumferentially along the first region 11, it is more conducive to dispersing the pressure received in the first region 11 away from the first region 11 to the outer edge of the second region 12, resulting in greater overall rigidity of the backplate and more balanced force distribution in different regions.
[0054] In this application, the rib 201 includes a first rib 21 and a second rib 22. The first rib 21 comprises at least three ribs, which are located on the first side 111 and spaced apart from each other along the circumference of the first region 11. Therefore, the at least three first ribs 21 can further improve the structural stiffness of the portion of the second region 12 located on the first side 111, and can make the pressure difference between the portion of the second region 12 located on the first side 111 and the first region 11 smaller and more uniform.
[0055] The second rib 22 includes at least three ribs, which are located on the second side 112 and spaced apart from each other along the circumference of the first region 11. Thus, the at least three second ribs 22 can further improve the structural stiffness of the portion of the second region 12 located on the second side 112, and can make the pressure difference between the portion of the second region 12 located on the second side 112 and the pressure difference in the first region 11 smaller and more uniform.
[0056] Along the width direction of the back panel body 10 (e.g.) Figure 1 (In the direction indicated by the middle arrow Z), the first region 11 also includes a third side 113 and a fourth side 114, and the rib 201 also includes a third rib 23 and a fourth rib 24. The third rib 23 includes at least three ribs, which are located on the third side 113 and spaced apart from each other along the circumference of the first region 11. The at least three third ribs 23 not only enhance the rigidity of the second region 12 but also transmit more pressure from the first region 11 to the second region 12, making the stress on the portion of the second region 12 located on the third side 113 more uniform.
[0057] The fourth rib 24 includes at least three ribs. The at least three fourth ribs 24 are located on the fourth side 114 and are spaced apart from each other along the circumference of the first region 11. The at least three fourth ribs 24 can not only make the second region 12 more rigid, but also transmit more pressure from the first region 11 to the second region 12, so that the part of the second region 12 located on the fourth side 114 is subjected to more uniform force.
[0058] Along the thickness direction of the backplate body 10, the projected outer contour of the first region 11 is circular. The circular first region 11 can better fit the piston end face and make the overall structure of the backplate body 10 more compact and reasonable.
[0059] Along the thickness direction of the backplate body 10, the thickness of the second region 12 is no greater than the thickness of the first region 11. Therefore, this application can improve the overall structural rigidity of the backplate while avoiding a significant increase in the weight of the backplate by making the thickness of the second region 12 less than or equal to the thickness of the first region 11. In particular, when the thickness of the second region 12 is less than that of the first region 11, the weight after increased rigidity is even smaller, thereby avoiding unnecessary inertial loads on the vehicle's braking system, reducing overall vehicle energy consumption, and achieving a balance between backplate rigidity and weight.
[0060] In this application, along the thickness direction of the back panel body 10, the second region 12 has a second thickness (e.g., ...). Figure 3 The thickness of the second region 12 (indicated by h2) gradually decreases in the direction away from the first region 11 (i.e., radially away from the first region 11 if the first region 11 is circular). In other words, the thickness of the second region 12 closer to the first region 11 is greater than the thickness of the side farther from the first region 11. This structure increases the structural rigidity of the backplate body 10 while reducing the overall weight of the backplate. Specifically, when the thickness of the second region 12 exhibits the aforementioned trend, it can reduce the material usage of the second region 12 while maintaining the structural rigidity of the first region 11, thereby reducing the overall weight of the backplate. Furthermore, the gradual thinning of the second region 12 away from the first region 11 also disperses stress, preventing stress concentration and reducing the risk of backplate fracture.
[0061] In this application, to avoid the risk of stress concentration caused by a large difference between the minimum thickness of the second region 12 and the thickness of the first region 11, the minimum thickness of the second region 12 can be set to be equal to or slightly greater than the thickness of the existing back plate. This allows the second region 12 to be thinner than the first region 11 while maintaining rigidity. For example, the second thickness of the second region 12 can be no less than 6.3 mm and no greater than the first thickness. Specifically, the second thickness can include one of 6.3 mm, 6.5 mm, 6.7 mm, 6.8 mm, 7 mm, 7.2 mm, 7.5 mm, 8 mm, or any other thickness value between 6.3 mm and the first thickness. This application does not impose a single limitation.
[0062] As the thickness of the second region 12 gradually decreases away from the first region 11, to ensure the structural rigidity of the second region 12, the rib 201 has a third thickness (e.g., along the thickness direction of the back plate body 10) Figure 3 The thickness (indicated by h3) is such that the third thickness is smaller on the side closer to the first region 11 than on the side farther from the first region 11. In other words, the third thickness of the rib 201 corresponding to the thinnest outer edge of the second region 12 is greater. This improves the structural rigidity of the thinner part of the second region 12 while reducing the overall weight of the back panel and making the overall structure of the back panel more compact and reliable.
[0063] Secondly, the thickness of the rib 201 can be gradually increased in the direction away from the first region 11. The rib 201 of this structure can improve the structural stiffness of the second region 12 according to the different thicknesses of the second region 12, thereby enhancing the overall stiffness of the back plate while reducing the weight of the back plate.
[0064] Along the thickness direction of the back panel body 10, the surface of the rib 201 away from the second region 12 is not higher than the surface of the first region 11. That is, the surface of the rib 201 away from the second region 12 can be flush with (i.e., located on the same plane) or lower than the surface of the first region 11. This avoids adding too much weight to the back panel due to the high protrusion height of the rib 201, improves the overall rigidity of the back panel, and makes the overall structure of the back panel more compact and aesthetically pleasing.
[0065] A second embodiment of this application also provides a brake pad, such as Figures 4 to 6 As shown, the brake pad includes a brake pad backing plate and a friction block 30. Along the thickness direction of the backing plate body 10, the backing plate body 10 includes a first surface 13 and a second surface 14. The friction block 30 is disposed on the second surface 14. For details on the structure of the brake pad backing plate, please refer to the content provided in the first embodiment of this application, which will not be repeated here.
[0066] The brake pads in this application have a rigidity reinforcement structure 20 on their backplate, which increases the overall structural rigidity of the backplate. Therefore, when the brake pad with this backplate is installed on the caliper, and the caliper piston contacts the first region 11 to push the brake pad, the rigidity reinforcement structure 20 not only suppresses the deformation of the first region 11 under stress, but also prevents the portion of the second region 12 located at least on the first side 111 and the second side 112 of the first region 11 from "tilting" away from the brake disc. This reduces the pressure difference between the second region 12 and the first region 11, and makes the stress on the portion of the second region 12 located on the first side 111 and the second side 112 of the first region 11 more uniform. Consequently, the pressure on each part of the friction block 30 is more uniform, thus preventing uneven wear on the friction block 30 of the brake pad.
[0067] like Figure 6 As shown, a connecting structure 40 is provided between the back plate body 10 and the friction block 30. The connecting structure 40 includes at least two protrusions 41 and at least two grooves 42. At least two protrusions 41 are disposed on one of the second surface 14 of the back plate body 10 and the friction block 30, and are spaced apart from each other along the length direction of the back plate body 10. At least two grooves 42 are disposed on the other of the second surface 14 and the friction block 30, and are spaced apart from each other along the length direction of the back plate body 10. The protrusions 41 and grooves 42 are adapted to each other, and at least two protrusions 41 are correspondingly embedded in at least two grooves 42, thereby improving the connection strength between the friction block 30 and the back plate body 10.
[0068] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0069] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.
[0070] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A brake pad backing plate, characterized in that, include: The back panel body (10) includes a first region (11) and a second region (12). The first region (11) is located in the middle of the back panel body (10), and the second region (12) surrounds the outer edge of the first region (11) along the length direction of the back panel body (10). The first region (11) includes a first side (111) and a second side (112). A rigid reinforcement structure (20) is disposed in the second region (12) and is located at least on the first side (111) and the second side (112).
2. The brake pad backing plate according to claim 1, characterized in that, Along the thickness direction of the backplate body (10), the backplate body (10) includes a first surface (13) and a second surface (14), and the rigid reinforcement structure (20) includes: A raised rib (201), the raised rib (201) protruding from the first surface (13); and / or, Along the thickness direction of the back panel body (10), the first region (11) has a first thickness, which is not less than 7 mm.
3. The brake pad backing plate according to claim 2, characterized in that, The ribs (201) include multiple ribs, which are arranged at intervals along the circumference of the first region (11).
4. The brake pad backing plate according to claim 2, characterized in that, The rib (201) extends from the outer edge of the first region (11) to the outer edge of the second region (12) away from the first region (11).
5. The brake pad backing plate according to claim 4, characterized in that, The rib (201) includes: The first rib (21) comprises at least three ribs, which are located on the first side (111) and spaced apart from each other circumferentially along the first region (11); and / or, The second rib (22) includes at least three ribs, which are located on the second side (112) and are spaced apart from each other along the circumference of the first region (11).
6. The brake pad backing plate according to claim 4, characterized in that, Along the width direction of the back panel body (10), the first region (11) further includes a third side (113) and a fourth side (114), and the rib (201) further includes: The third rib (23), comprising at least three ribs, is located on the third side (113) and spaced apart from each other circumferentially along the first region (11); and / or, The fourth rib (24) includes at least three ribs, which are located on the fourth side (114) and are spaced apart from each other along the circumference of the first region (11).
7. The brake pad backing plate according to any one of claims 4 to 6, characterized in that, Along the thickness direction of the backplate body (10), the projected outer contour of the first region (11) is circular; and / or, Along the thickness direction of the back plate body (10), the thickness of the second region (12) is not greater than the thickness of the first region (11).
8. The brake pad backing plate according to claim 7, characterized in that, Along the thickness direction of the back plate body (10), the second region (12) has a second thickness, which gradually decreases in the direction away from the first region (11).
9. The brake pad backing plate according to claim 8, characterized in that, Along the thickness direction of the back plate body (10), the rib (201) has a third thickness, wherein: The third thickness is smaller on the side closer to the first region (11) than on the side farther from the first region (11); and / or, The third thickness gradually increases in a direction away from the first region (11); and / or; Along the thickness direction of the back plate body (10), the surface of the rib (201) away from the second region (12) is not higher than the surface of the first region (11).
10. A brake pad, characterized in that, include: The brake pad backing plate according to any one of claims 1 to 9, along the thickness direction of the backing plate body (10), the backing plate body (10) includes a first surface (13) and a second surface (14); Friction block (30) is disposed on the second surface (14).