Brake caliper

Abstract

The embodiment of the utility model provides a brake caliper, and relates to the technical field of automatic equipment. The brake caliper comprises a caliper support, a piston and a vibration reduction piece, and the vibration reduction piece is arranged on an inner friction piece and faces the piston. By arranging the damping piece, the damping piece is arranged on the inner friction piece and faces one side of the piston, when the piston pushes the inner friction piece to move to enable the inner friction piece and the outer friction piece to conduct clamping braking on the brake disc, the inner friction piece and the outer friction piece rub against the brake disc to generate abnormal sound, and the damping piece can prevent noise from being transmitted outwards from the inner friction piece; the noise transmission path is effectively blocked, the rigidity of a friction plate system is remarkably enhanced, and the braking stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of braking equipment technology, and more specifically, to a brake caliper. Background Technology

[0002] With the continuous advancement of automotive technology and the increasing demands of consumers for driving experience, the performance and reliability of braking systems have become crucial indicators of vehicle safety. However, brake system noise, a long-standing technical challenge in the automotive industry, not only severely impacts driving comfort and safety but also increases vehicle maintenance costs. This problem is particularly pronounced in electric and hybrid vehicles, where the relatively low noise levels of the powertrain make brake system noise even more significant.

[0003] Among these, the design of vibration isolation measures for the braking system is of great significance for reducing abnormal noise in the braking system and improving braking performance. Currently, the main shortcomings of vibration isolation measures for braking systems are poor isolation effectiveness; the vibration isolation measures used in the braking system are inadequate and cannot effectively reduce abnormal noise in the braking system. Utility Model Content

[0004] The purpose of this invention is to provide a brake caliper in which the damping pad can block noise from being transmitted from the inner friction element to the outside, effectively blocking the noise propagation path.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, the present invention provides a brake caliper, comprising: a caliper bracket, wherein an inner friction member and an outer friction member for clamping a brake disc are slidably disposed on the caliper bracket, and the inner friction member and the outer friction member are located on both sides of the brake disc;

[0007] A piston is disposed on the side of the inner friction member away from the outer friction member, and the piston is used to push the inner friction member toward the brake disc;

[0008] A damping plate is disposed on the internal friction member and faces the piston.

[0009] In an optional embodiment, the damping plate is provided with at least one claw, which engages with the internal friction element.

[0010] In an optional embodiment, the internal friction member includes an inner back plate and an inner friction pad connected to each other. The inner friction pad is disposed on the inner back plate and faces the outer friction member. The damping pad is limited to the back plate and is located between the inner back plate and the piston. The inner back plate is slidably connected to the caliper bracket.

[0011] The external friction component includes an outer back plate and an outer friction pad connected to each other. The outer friction pad is disposed on the outer back plate and faces the inner friction component. The outer back plate is slidably connected to the caliper bracket.

[0012] In an optional embodiment, the inner friction member has a first groove on the side facing the outer friction member, and the first groove extends along the vertical direction of the inner friction member.

[0013] In an optional embodiment, the outer friction member has a second groove on the side facing the inner friction member, the second groove extends along the vertical direction of the outer friction member, and the first groove and the second groove are symmetrically arranged.

[0014] The first groove and the second groove are Y-shaped grooves.

[0015] In an optional embodiment, the inner friction member has a first chamfer on the side facing the outer friction member, and the two first chamfers are respectively located on opposite sides of the inner friction member, and the two first chamfers extend along the vertical direction of the inner friction member.

[0016] In an optional embodiment, the outer friction member has a second chamfer on the side facing the inner friction member, and the two second chamfers are respectively located on opposite sides of the outer friction member, and the two second chamfers extend along the vertical direction of the inner friction member;

[0017] The two first chamfers are symmetrically arranged with the two second chamfers.

[0018] In an optional embodiment, the brake disc is constructed of a low-metallic material.

[0019] In an optional embodiment, the caliper bracket includes a bracket body, a first connecting part, and a second connecting part. The first connecting part is provided at both ends of the bracket body, and the first connecting part is connected to the second connecting part through a crossbeam.

[0020] The crossbeam has an inclined surface, which faces the center of the support body and is inclined upward along the X-axis. The inclined surface forms an angle with the X-axis, which is 60°-15°.

[0021] In an optional embodiment, the brake caliper further includes a caliper assembly, the caliper assembly having a caliper space, and the caliper bracket, the outer friction member, the inner friction member, and the piston being disposed within the caliper space;

[0022] The internal friction element is slidably connected to the caliper bracket, and the caliper bracket, the internal friction element, the damping plate, and the caliper assembly are positioned and connected by a positioning element;

[0023] One end of the piston is connected to the caliper assembly, and the other end is used to push the internal friction element toward the brake disc;

[0024] The external friction element is slidably connected to the caliper bracket, and the external friction element is connected to the caliper assembly through an elastic element.

[0025] The beneficial effects of the brake caliper provided in this embodiment of the present invention include:

[0026] By setting up damping pads, which are installed on the inner friction component and facing the piston, when the piston pushes the inner friction component to move so that the inner and outer friction components clamp and brake the brake disc, the friction between the inner and outer friction components and the brake disc generates abnormal noise. The damping pads can block the noise from being transmitted from the inner friction component to the outside, effectively blocking the noise propagation path, and also significantly enhancing the rigidity of the friction pad system and improving braking stability. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the brake caliper provided in this embodiment;

[0029] Figure 2 This is an exploded view of the brake caliper provided in this embodiment;

[0030] Figure 3 This is a structural schematic diagram of one side of the internal friction component provided in this embodiment;

[0031] Figure 4 This is a schematic diagram of the structure of the other side of the internal friction component and the damping plate provided in this embodiment;

[0032] Figure 5 This is a schematic diagram of the caliper bracket provided in this embodiment;

[0033] Figure 6 The frequency response function diagram of the brake disc provided in this embodiment.

[0034] Icons: 010-Brake caliper; 100-Inner friction element; 110-Inner backplate; 111-Inner lug; 120-Inner friction pad; 121-First groove; 122-First chamfer; 200-Outer friction element; 210-Outer backplate; 211-Outer lug; 220-Outer friction pad; 221-Second groove; 222-Second chamfer; 300-Damping pad; 310-Pawl; 400-Piston; 500-Caliper bracket; 510-Bracket body; 520-First connecting part; 530-Crossbeam; 531-Inclined surface; 540-Second connecting part; 600-Caliper assembly; 700-Elastic element; 710-Spring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0040] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0041] The following describes in detail the overall structure, working principle, and technical effects of the brake caliper 010 provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0042] Please refer to Figures 1-2 The brake caliper 010 provided by this utility model is applied to the braking system of electric vehicles and hybrid vehicles.

[0043] Please refer to Figures 1-2 The present invention proposes a brake caliper 010, comprising: a caliper bracket 500, on which an inner friction member 100 and an outer friction member 200 for clamping a brake disc are slidably disposed, the inner friction member 100 and the outer friction member 200 being located on both sides of the brake disc;

[0044] Piston 400 is located on the side of the inner friction member 100 away from the outer friction member 200. Piston 400 is used to push the inner friction member 100 toward the brake disc.

[0045] The damping plate 300 is disposed on the internal friction member 100 and faces the piston 400.

[0046] Understandably, by setting up the damping pad 300, which is located on the inner friction member 100 and faces the piston 400, when the piston 400 pushes the inner friction member 100 to move so that the inner friction member 100 and the outer friction member 200 clamp and brake the brake disc, the friction between the inner friction member 100 and the outer friction member 200 and the brake disc generates abnormal noise. The damping pad 300 can block the noise from being transmitted from the inner friction member 100 to the outside, effectively blocking the noise propagation path, and also significantly enhancing the rigidity of the friction pad system and improving braking stability.

[0047] In this embodiment, the brake caliper 010 includes a brake disc.

[0048] In this embodiment, the brake disc is made of a low-metallic material.

[0049] The brake disc is made of a low-metal material structure.

[0050] Understandably, existing brake discs use NAO (non-asbestos organic) material; please refer to [reference needed]. Figure 6 , Figure 6 The graph shows the frequency response function of the brake disc. The red line represents the brake disc made of NAO material, and the red arrow indicates that the natural frequency of the brake disc made of NAO material is 2300 Hz. The natural frequency of the brake disc made of NAO material is the same as the resonant frequency of the friction pad. During braking, when the friction pad and the brake disc rub against each other, their vibration frequencies are close, which will cause resonance and generate noise.

[0051] This application addresses brake pad materials, replacing the original NAO (non-asbestos organic) material with a low-metallic material. Please refer to [the relevant documentation / reference]. Figure 6 , Figure 6 The diagram shows the frequency response function of the brake disc; the blue line represents a brake disc made of low-metallic materials, and the blue arrow indicates that the natural frequency of the brake disc made of low-metallic materials is 3083 Hz. It is important to note that the natural frequency of a brake disc is inversely proportional to its mass; the greater the mass, the lower the natural frequency; and the smaller the mass, the higher the natural frequency. Therefore, this application replaces the brake disc material from the heavier NAO material with a lighter low-metallic material. This material optimization, by changing the friction vibration frequency, successfully avoids the resonant frequency region and effectively reduces noise generated during braking.

[0052] Meanwhile, the optimized low-metal brake discs exhibit excellent performance in durability, weather resistance, and other key properties, ensuring stability and reliability under various operating conditions. Furthermore, the low-metal material used in the brake discs is fully compatible with existing designs and manufacturing processes, with no incompatibility issues observed.

[0053] Furthermore, this application also adjusts the manufacturing process of the brake disc, particularly optimizing the compressibility of the friction material. This adjustment significantly improves the material's ability to absorb vibration energy. Under vibration, the optimized material of the brake disc can more effectively disperse and absorb vibration energy, thereby effectively reducing the adverse effects of vibration on the overall performance of the braking system and ensuring the smoothness and reliability of the braking process.

[0054] In this embodiment, the brake caliper 010 includes an inner friction plate 120 and an outer friction plate 220.

[0055] In this embodiment, please refer to Figures 1-2 The inner friction component 100 includes an inner back plate 110 and an inner friction plate 120 connected to each other. The inner friction plate 120 is disposed on the inner back plate 110 and faces the outer friction component 200. The damping plate 300 is limited to the inner back plate 110 and is located between the inner back plate 110 and the piston 400. The inner back plate 110 is slidably connected to the caliper bracket 500.

[0056] Please refer to Figure 3 The inner back plate 110 has inner lugs 111 at both ends, and the inner back plate 110 is slidably connected to the first connecting frame of the caliper bracket 500 through the inner lugs 111.

[0057] In this embodiment, please refer to Figure 3The inner friction plate 120 of the inner friction member 100 facing the outer friction member 200 is provided with a first groove 121, which extends along the vertical direction of the inner friction member 100. The first groove 121 is a Y-shaped groove.

[0058] In this embodiment, please refer to Figure 3 The inner friction plate 120 of the inner friction member 100 facing the outer friction member 200 is provided with a first chamfer 122. The two first chamfers 122 are located on opposite sides of the inner friction member 100 and extend along the vertical direction of the inner friction member 100.

[0059] It is understandable that the existing outer friction pad 220 and inner friction pad 120 have flat contact surfaces with the brake disc. When the friction pad contacts the brake disc, the upper and lower edges of the friction pad experience more force than the center, resulting in uneven force distribution. This can easily lead to abnormal noise due to poor contact between the friction pad and the brake disc. This application addresses this by providing a first groove 121 and a first chamfer 122 on the inner friction pad 120. When the inner friction surface contacts the brake disc, the center of the inner friction pad 120 experiences uniform force, further improving braking smoothness and reducing abnormal noise. This optimized contact surface between the inner friction pad 120 and the brake disc reduces abnormal noise caused by poor contact, ensuring the braking system maintains stable performance even after prolonged operation, thereby extending the overall system lifespan.

[0060] In this embodiment, please refer to Figure 2 The outer friction member 200 includes an outer back plate 210 and an outer friction plate 220 connected to each other. The outer friction plate 220 is disposed on the outer back plate 210 and faces the inner friction member 100. The outer back plate 210 is slidably connected to the caliper bracket 500.

[0061] The outer back plate 210 has protruding ears 211 at both ends, and the outer back plate 210 is slidably connected to the second connecting frame of the caliper bracket 500 through the protruding ears 211.

[0062] In this embodiment, please refer to Figure 2 The outer friction plate 220 of the outer friction member 200 facing the inner friction member 100 is provided with a second groove 221. The second groove 221 extends along the vertical direction of the outer friction member 200. The first groove 121 and the second groove 221 are symmetrically arranged. The second groove 221 is a Y-shaped groove.

[0063] In this embodiment, the outer friction member 200 has a second chamfer 222 on the side facing the inner friction member 100. The two second chamfers 222 are located on opposite sides of the outer friction member 200 and extend along the vertical direction of the inner friction member 100. The two first chamfers 122 and the two second chamfers 222 are symmetrically arranged.

[0064] Understandably, similar to the inner friction pad 120, by providing a second groove 221 and a second chamfer 222 on the outer friction pad 220, the center of the outer friction pad 220 is evenly stressed when the outer friction surface contacts the brake disc, further improving braking smoothness and reducing abnormal noise. This optimizes the contact surface between the outer friction pad 220 and the brake disc, reducing abnormal noise problems caused by poor contact, ensuring that the braking system can maintain stable working performance after long-term operation, and thus extending the service life of the entire system.

[0065] In this embodiment, the brake caliper 010 includes a damping plate 300.

[0066] The damping plate 300 is disposed on the internal friction member 100 and faces the piston 400.

[0067] In this embodiment, please refer to Figure 4 The damping plate 300 is provided with at least one claw 310, and at least one claw 310 is engaged with the internal friction member 100.

[0068] Optionally, the damping plate 300 is provided with two claws 310, which are engaged with the inner back plate 110 of the inner friction member 100.

[0069] The upper part of the damping plate 300 is engaged with the inner back plate 110 of the inner friction member 100 via a claw 310, the middle part of the damping plate 300 is connected to the inner friction member 100 via a connector, and the lower part of the damping plate 300 is fixed between the caliper bracket 500 and the inner friction member 100 via a connector; this achieves the connection between the damping plate 300 and the inner friction member 100, thereby blocking the transmission of noise.

[0070] In this embodiment, the brake caliper 010 includes a caliper bracket 500.

[0071] In this embodiment, please refer to Figure 5 The caliper bracket 500 includes a bracket body 510, a first connecting part 520 and a second connecting part 540. The first connecting part 520 is provided at both ends of the bracket body 510, and the first connecting part 520 is connected to the second connecting part 540 through a crossbeam 530.

[0072] The bracket body 510 has a first connecting part 520 along the Z-axis direction, which is used to slide with the inner friction member 100; the bracket body 510 has a crossbeam 530 and a second connecting part 540 along the Y-axis direction, which is used to connect the first connecting part 520 and the second connecting part 540 and to leave space for installing the inner friction member 100 and the outer friction member 200; the second connecting part 540 is used to slide with the outer friction plate 220.

[0073] Please refer to Figure 5 The crossbeam 530 is provided with an inclined surface 531. The inclined surface 531 faces the center of the support body 510 and is inclined upward along the X-axis. The inclined surface 531 forms an angle with the X-axis, which is 15°-60°.

[0074] Preferably, the included angle is 15°-30°. It can be understood that, relative to the 15°-60° included angle between the inclined surface 531 and the X-axis direction, the 15°-30° included angle between the inclined surface 531 and the X-axis direction can further prevent the brake caliper 010 bracket from resonating with other structures, thereby effectively avoiding resonance noise or effectively reducing resonance noise.

[0075] Understandably, by optimizing the structure of the caliper bracket 500, the occurrence of solid-frequency coupling can be avoided, thereby ensuring the robustness of the braking system.

[0076] In this embodiment, the brake caliper 010 also includes a caliper assembly 600.

[0077] In this embodiment, please refer to Figure 2 The caliper assembly 600 has a caliper space, in which the caliper bracket 500, outer friction element 200, inner friction element 100 and piston 400 are disposed.

[0078] The internal friction component 100 is slidably connected to the caliper bracket 500, and the caliper bracket 500, internal friction component 100, damping plate 300, and caliper assembly 600 are positioned and connected by a positioning component. The positioning component can be a positioning shaft, etc.

[0079] The piston 400 is also housed within the caliper space, with one end connected to the caliper assembly 600 and the other end used to push the internal friction member 100 toward the brake disc. Driven by a hydraulic system, the piston 400 pushes the internal friction member 100 toward the brake disc.

[0080] The outer friction element 200 is slidably connected to the caliper bracket 500, and the outer friction element 200 is connected to the caliper assembly 600 via an elastic element 700. The elastic element 700 is mounted on the caliper bracket 500 and is used to reset the outer friction element 200 and the inner friction element 100. Optionally, the elastic element 700 can be a compression spring structure with spring tabs 710 at both ends.

[0081] In summary, the brake caliper 010 provided in this embodiment of the present invention has the following advantages:

[0082] 1. Optimize the manufacturing process and materials of the brake disc: 1) In terms of the brake disc manufacturing process, adjust the compression ratio of the brake pad friction material to enhance its ability to absorb vibration energy and reduce the impact of vibration. 2) In terms of the brake disc material, use low-metallic materials to replace NAO materials, change the friction vibration frequency, avoid the resonance zone, and reduce noise.

[0083] 2. Innovations in vibration isolation measures for the braking system: 1) A damping pad 300 with a locking claw 310 is added to the inner friction component 100. The damping pad 300 blocks the noise propagation path and also enhances the system rigidity. 2) The pressure distribution between the inner friction component 100 and the outer friction component 200 is optimized, achieving uniform force distribution between the inner friction component 100 and the outer friction component 200, thus improving braking stability.

[0084] 3. Braking system structural design optimization: 1) Fine-tune key components to avoid solid-frequency coupling and ensure stable system operation. 2) Improve the material and design of the brake disc, optimize the contact state between the brake disc and the inner friction component 100 and the outer friction component 200, and reduce abnormal noise caused by poor contact.

[0085] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A brake caliper, characterized in that The utility model provides a brake caliper, including: A caliper support, an inner friction piece and an outer friction piece for clamping a brake disc are slidably arranged on the caliper support, and the inner friction piece and the outer friction piece are located on both sides of the brake disc; A piston is arranged on the side of the inner friction piece away from the outer friction piece, and the piston is used to push the inner friction piece to move towards the brake disc; A damping piece is arranged on the inner friction piece and faces the piston.

2. Brake caliper according to claim 1, characterized in that At least one claw is arranged on the damping piece, and the at least one claw is clamped with the inner friction piece.

3. The brake caliper according to claim 1, characterized in that, The inner friction piece comprises an inner back plate and an inner friction piece connected with each other, the inner friction piece is arranged on the inner back plate and faces the outer friction piece, the damping piece is limited on the inner back plate, the damping piece is located between the inner back plate and the piston, and the inner back plate is slidably connected with the caliper support; The outer friction piece comprises an outer back plate and an outer friction piece connected with each other, the outer friction piece is arranged on the outer back plate and faces the inner friction piece, and the outer back plate is slidably connected with the caliper support.

4. The brake caliper according to claim 1, characterized in that, One side of the inner friction piece facing the outer friction piece is provided with a first groove, and the first groove extends along the vertical direction of the inner friction piece.

5. The brake caliper according to claim 4, characterized in that, One side of the outer friction piece facing the inner friction piece is provided with a second groove, the second groove extends along the vertical direction of the outer friction piece, and the first groove and the second groove are symmetrically arranged; The first groove and the second groove are Y-shaped grooves.

6. The brake caliper according to claim 1, characterized in that, One side of the inner friction piece facing the outer friction piece is provided with a first chamfer, and two first chamfers are respectively located on the opposite sides of the inner friction piece, and the two first chamfers extend along the vertical direction of the inner friction piece.

7. The brake caliper according to claim 6, characterized in that, One side of the outer friction piece facing the inner friction piece is provided with a second chamfer, and two second chamfers are respectively located on the opposite sides of the outer friction piece, and the two second chamfers extend along the vertical direction of the inner friction piece; The two first chamfers and the two second chamfers are symmetrically arranged.

8. The brake caliper according to claim 1, characterized in that, The brake disc is a low-metal material structure.

9. The brake caliper according to claim 1, characterized in that, The caliper support comprises a support body, a first connecting part and a second connecting part, the first connecting part is arranged at both ends of the support body, and the first connecting part is connected with the second connecting part through a cross beam; An inclined surface is arranged on the cross beam, the inclined surface faces the center of the support body and inclines upward along the X-axis direction, the inclined surface forms an included angle with the X-axis direction, and the included angle is 15°-60°.

10. The brake caliper according to claim 1, characterized in that, The brake caliper further comprises a caliper assembly, the caliper assembly is internally provided with a caliper space, the caliper support, the outer friction piece, the inner friction piece and the piston are arranged in the caliper space; The inner friction piece is slidably connected with the caliper support, the caliper support, the inner friction piece, the damping piece and the caliper assembly are positioned and connected through a positioning piece; One end of the piston is connected with the caliper assembly, and the other end is used to push the inner friction piece to move towards the brake disc; The outer friction piece is slidably connected with the caliper support, and the outer friction piece is connected with the caliper assembly through an elastic piece.

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