Disc brake and vehicle having the same

Abstract

The embodiment of the present application provides a disc brake. Specifically, the disc brake comprises a brake support, the brake support has a mounting cavity; a return spring assembly is located in the mounting cavity, the return spring assembly comprises a return spring and an elastic snap spring, the elastic snap spring is mounted on the brake support, the elastic snap spring has a avoiding part, part of the return spring is located in the avoiding part, one end of the return spring is in abutment with the elastic snap spring, and the other end of the return spring is connected with a friction plate; wherein the friction plate has a working state of braking the brake disc, and the friction plate has an initial state of releasing the brake disc, when the friction plate is in the working state, the return spring applies a restoring force to the friction plate to reset to the initial state. The present application solves the technical problem of unstable return of the friction plate in the prior art.

Description

Technical Field

[0001] This application relates to the field of automotive braking technology, and more specifically, to a disc brake and a vehicle having the same. Background Technology

[0002] Existing disc brake friction pad return mechanisms mainly rely on the return of the piston and the centrifugal force when the brake disc rotates to disengage the friction pads from the brake disc. However, after the brake is released, the friction pads often cannot return quickly and completely, resulting in drag, which increases the vehicle's driving resistance and energy consumption, while also reducing the overall efficiency and lifespan of the braking system.

[0003] No effective solution has yet been proposed to address the aforementioned technical issues. Utility Model Content

[0004] This application provides a disc brake and a vehicle having the same, aiming to improve the technical problem of unstable friction pad return in the prior art.

[0005] According to one aspect of the embodiments of this application, a disc brake is provided, including a brake bracket having a mounting cavity; a return spring assembly located within the mounting cavity, the return spring assembly including a return spring and a retaining circlip, the retaining circlip being mounted on the brake bracket, the retaining circlip having a clearance portion, a portion of the return spring being located within the clearance portion, and one end of the return spring abutting against the retaining circlip, the other end of the return spring being connected to a friction pad.

[0006] Furthermore, the return spring includes: a spring body, which is fitted to the mounting surface of the friction plate; the spring body has a first connecting segment, a second connecting segment, and a third connecting segment; the first end of the first connecting segment is connected to the first end of the spring body; the second end of the first connecting segment is connected to the friction plate; the first end of the second connecting segment is connected to the second end of the spring body; the second end of the second connecting segment overlaps with the brake bracket; the first end of the third connecting segment is connected to the second end of the spring body; the third connecting segment is located between the first and second connecting segments; and the second end of the third connecting segment protrudes towards the braking surface of the friction plate.

[0007] Furthermore, within the first preset distance range of the friction pad movement, the second end of the third connecting segment is spaced apart from the brake disc. When the friction pad moves beyond the first preset distance range, the friction pad can drive the second end of the third connecting segment to move synchronously, so that the end of the second end of the third connecting segment contacts the brake disc to emit an alarm sound.

[0008] Further, the second connecting segment includes: a first spring, the first end of which is connected to the second end of the spring body, and the second end of which is bent and disposed on the outside of the third connecting segment; a second spring, the first end of which is connected to the spring body, and the second end of which is bent and disposed on the outside of the third connecting segment, and connected to the second end of the first spring; a connector, the first end of which is connected to the connection between the first spring and the second spring, the second end of which is bent outward away from the connection to form a hook, and the second end of which overlaps with one side of the brake bracket; wherein, along the width direction of the spring body, the third connecting segment is located between the first spring and the second spring.

[0009] Furthermore, the elastic retaining ring includes: a retaining ring body, a plurality of first limiting members are provided on one side of the retaining ring body, the plurality of first limiting members are spaced apart along the length direction of the retaining ring body, a second limiting member is provided on the other side of the retaining ring body, the first limiting member and the second limiting member are arranged opposite to each other, and the first limiting member and the second limiting member are connected to the brake bracket.

[0010] Furthermore, the elastic retaining ring also includes: a fourth connecting segment, one end of which is connected to one end of the retaining ring body, and the other end of which extends away from the retaining ring body and is bent outward to form a flange structure; a fifth connecting segment, one end of which supports the spring sheet and is connected to the other end of the retaining ring body, and the other end of which extends away from the retaining ring body, and the fifth connecting segment and the fourth connecting segment are arranged opposite to each other; wherein, a clearance portion is formed between the fifth connecting segment and the fourth connecting segment, and the second end of the third connecting segment is located within the clearance portion and abuts against the second limiting member.

[0011] Furthermore, at least one mounting groove is provided inside the mounting cavity, the snap ring body is fitted to the bottom of the mounting groove, the fourth connecting section and the fifth connecting section are fitted to the groove walls on both sides of the mounting groove respectively, and the flange structure is connected to the brake bracket.

[0012] Furthermore, a support spring is provided on the side of the fourth connecting segment away from the mounting groove. One end of the support spring is connected to the fourth connecting segment, and the other end of the support spring extends along the width direction of the fourth connecting segment. The support spring and the fourth connecting segment are provided with a gap.

[0013] Furthermore, both the return spring and the elastic retaining ring are integrally bent and formed.

[0014] According to one aspect of the embodiments of this application, a vehicle is provided, including a disc brake, wherein the disc brake is any of the disc brakes described in the above embodiments.

[0015] The embodiments of this application achieve the following technical effects: By integrating a return spring and a spring clip, when the vehicle brakes, the friction pads contact the brake disc to generate braking force. At this time, the return spring deforms due to the forward movement of the friction pads, storing elastic potential energy. Once the brakes are released, the return spring releases the stored energy, pulling the friction pads back to their original position quickly. Simultaneously, the spring clip provides longitudinal support, preventing the friction pads from sagging or shifting during the return process, ensuring that the friction pads return along the correct path and avoiding dragging. This structural design allows the friction pads to return to their original position more quickly and accurately, reducing unnecessary contact with the brake disc, thereby reducing dragging torque, extending the service life of the friction pads, and also reducing overall vehicle energy consumption. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This is an assembly diagram of the first embodiment of the disc brake provided in this application;

[0018] Figure 2 This is a schematic diagram of the structure of the first embodiment of the return spring assembly provided in this application;

[0019] Figure 3 This is a schematic diagram of the structure of the second embodiment of the return spring assembly provided in this application;

[0020] Figure 4 This is an assembly diagram of the third embodiment of the return spring assembly provided in this application;

[0021] Figure 5 This is an assembly diagram of the fourth embodiment of the return spring assembly provided in this application;

[0022] Figure 6 This is a schematic diagram of the structure of the first embodiment of the return spring provided in this application;

[0023] Figure 7 This is a schematic diagram of the structure of the second embodiment of the elastic retaining spring provided in this application;

[0024] Figure 8 This is an assembly diagram of the second embodiment of the return spring provided in this application;

[0025] Figure 9 This is an assembly diagram of the second embodiment of the elastic retaining spring provided in this application;

[0026] Figure 10 This is a schematic diagram of the structure of the second embodiment of the disc brake provided in this application;

[0027] Figure 11 This is a schematic diagram of the third embodiment of the disc brake provided in this application;

[0028] Figure 12 This is a schematic diagram of the fourth embodiment of the disc brake provided in this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Brake bracket;

[0031] 10. Installation cavity;

[0032] 11. First side view;

[0033] 12. Second side view;

[0034] 110. Mounting slot;

[0035] 2. Return spring;

[0036] 20. Spring body;

[0037] 21. First connecting segment;

[0038] 211. Countertop;

[0039] 22. Second connecting segment;

[0040] 221. First reed;

[0041] 222. The second reed;

[0042] 223. Connectors;

[0043] 23. Third connecting segment;

[0044] 3. Elastic retaining ring;

[0045] 30. The circlip body;

[0046] 31. Second limiting component;

[0047] 32. First limiting component;

[0048] 33. Fourth connecting segment;

[0049] 34. Flanged structure;

[0050] 35. Fifth connecting segment;

[0051] 36. Support spring;

[0052] 37. Avoidance section;

[0053] 4. Friction plates;

[0054] 41. The first section;

[0055] 42. The second section;

[0056] 5. Brake disc. Detailed Implementation

[0057] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] 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.

[0059] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0060] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0061] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0062] Existing technologies include two types of return mechanisms for disc brakes: ① A friction pad is installed inside a brake caliper bracket. The brake caliper bracket has a spring retaining groove. One end of a return spring plate is installed in the spring retaining groove, and the other end of the return spring plate is connected to and hooks onto the edge ear of the friction pad. The return spring plate is designed at a right angle where it connects to the friction pad. When the friction pad is pushed forward, the return spring plate generates a deformation tension, which causes the friction pad to tend to retract. ② A brake friction pad return mechanism includes a return plate. One end of the return plate has at least two riveting holes. Rivets pass through the riveting holes and rivet the return plate onto the friction pad. The other end of the return plate contacts the caliper bracket.

[0063] The existing disc brake return mechanism has the following problems:

[0064] 1) Cannot integrate a friction plate wear alarm device.

[0065] 2) The return spring is riveted to the friction plate. If the return spring fails or breaks, only the friction plate assembly can be replaced, and the spring plate cannot be replaced separately, resulting in poor economic efficiency.

[0066] like Figures 1 to 10 As shown, this application provides a disc brake.

[0067] Specifically, such as Figure 1 , Figure 10 As shown, the disc brake includes a brake bracket 1 with a mounting cavity 10; a return spring assembly located within the mounting cavity 10, comprising a return spring 2 and a spring retainer 3. The spring retainer 3 is mounted on the brake bracket 1 and has a clearance portion 37. Part of the return spring 2 is located within the clearance portion 37, with one end of the return spring 2 abutting against the spring retainer 3 and the other end of the return spring 2 connected to a friction pad 4. The friction pad 4 has a working state for braking the brake disc 5 and an initial state for releasing the brake disc 5. When the friction pad 4 is in the working state, the return spring 2 applies a restoring force to the friction pad 4 to return it to its initial state.

[0068] In this embodiment, return springs 2 are provided at both ends of the friction plate 4 to ensure that the friction plate 4 can quickly and accurately return to its initial position after braking, reducing the drag phenomenon between the friction plate 4 and the brake disc 5. The return spring 2 utilizes its elastic properties to store energy during braking and releases the energy after braking ends, pushing the friction plate 4 back to its original position.

[0069] The embodiments of this application achieve the following technical effects: By integrating a return spring and a spring clip, when the vehicle brakes, the friction pads contact the brake disc to generate braking force. At this time, the return spring deforms due to the forward movement of the friction pads, storing elastic potential energy. Once the brakes are released, the return spring releases the stored energy, pulling the friction pads back to their original position quickly. Simultaneously, the spring clip provides longitudinal support, preventing the friction pads from sagging or shifting during the return process, ensuring that the friction pads return along the correct path and avoiding dragging. This structural design allows the friction pads to return to their original position more quickly and accurately, reducing unnecessary contact with the brake disc, thereby reducing dragging torque, extending the service life of the friction pads, and also reducing overall vehicle energy consumption.

[0070] Specifically, such as Figure 2 , Figure 3 The return spring 2 shown includes: a spring body 20, which is fitted to the mounting surface of the friction plate 4. The spring body 20 has a first connecting segment 21, a second connecting segment 22 and a third connecting segment 23. The first end of the first connecting segment 21 is connected to the first end of the spring body 20, and the second end of the first connecting segment 21 is connected to the friction plate 4. The first end of the second connecting segment 22 is connected to the second end of the spring body 20 and overlaps with the brake bracket 1. The first end of the third connecting segment 23 is connected to the second end of the spring body 20. The third connecting segment 23 is located between the first connecting segment 21 and the second connecting segment 22, and the second end of the third connecting segment 23 protrudes towards the braking surface of the friction plate 4.

[0071] Optionally, the return spring 2 is centered in both the longitudinal and transverse directions of the friction plate 4 to avoid uneven wear and drag during return.

[0072] It should be further explained that the first end of the first connecting segment 21 is connected to the first end of the spring body 20, and the second end of the first connecting segment 21 extends downward in the vertical direction and is bent inward to form a platform 211, and at least part of the friction piece 4 is in contact with the platform 211.

[0073] The second connecting section 22 serves as a bridge between the return spring 2 and the brake bracket 1. Its first end is also connected to the second end of the spring body 20, while the second end overlaps with the brake bracket 1. This overlap or hooking method is typically used for fixation, ensuring that the force experienced by the return spring 2 during braking is effectively transmitted and stored. The overlap with the brake bracket 1 ensures that the return spring maintains its structural integrity under any operating conditions, preventing loosening or failure that may occur after high-intensity braking or prolonged use.

[0074] Specifically, such as Figure 8 As shown, within the first preset distance range of friction pad 4 movement, the second end of the third connecting section 23 is spaced apart from the brake disc 5. When friction pad 4 moves beyond the first preset distance range, friction pad 4 can drive the second end of the third connecting section 23 to move synchronously, so that the end of the second end of the third connecting section 23 contacts the brake disc 5 to emit an alarm sound. The ingenuity of this design lies in utilizing the structural characteristics of the return spring. By using the second end of the third connecting section as a wear monitoring contact, it does not affect the normal braking and return functions, but also provides the added value of wear alarm. In addition, due to the protruding design of the third connecting section, there will be no false alarm even when the friction pad is slightly worn. The alarm will only be triggered when the wear reaches a predetermined critical value, ensuring the accuracy and practicality of the alarm mechanism.

[0075] like Figure 11 , Figure 12 As shown, the friction plate 4 includes a first component segment 41 and a second component segment 42. The first component segment 41 is located above the second component segment 42. The length of the first component segment 41 is greater than the length of the second component segment 42. The first component segment 41 is connected to the first connecting segment 21. The second end of the third connecting segment 23 protrudes from the lower surface of the first component segment 41. When the friction plate 4 is in working condition, the lower surface of the second component segment 42 is in contact with the brake disc 5.

[0076] In this embodiment, when the friction pad is subjected to slight braking under normal conditions, the second component section of the friction pad is in contact with the brake disc, and the second component section 42 will gradually wear down, such as... Figure 11 , Figure 12 As shown, the thickness of the second segment 42 is 'a', meaning the maximum downward distance the friction plate can move is the first preset distance (e.g., ...). Figure 11Within the range of a). At this stage, the friction generated between the friction pad and the brake disc 5 is sufficient to apply brakes, but the movement of the friction pad does not cause the second end of the third connecting segment 23 to directly contact the brake disc. This is because the second end of the third connecting segment is designed to protrude slightly on one side of the lower surface of the first component segment 41. Therefore, at this stage, the third connecting segment remains in the avoidance position and does not trigger the alarm function. However, when the wear of the second component segment 42 reaches a certain level, that is, when the friction pad moves a distance exceeding the first preset distance range during braking, the situation changes. Due to the reduced thickness of the second component segment 42, when braking is performed again, the friction pad will move further to compensate for its thickness loss and achieve the same level of contact with the brake disc. In this process, the friction pad not only drives the second end of the third connecting segment to move synchronously, but also, due to the excessive movement of the friction pad, the end of the third connecting segment will eventually contact the surface of the brake disc 5 with the first component segment 41 earlier. When the second end of the third connecting section 23 contacts the surface of the brake disc 5, as the brake disc rotates, the end of the third connecting section will produce continuous knocking or scraping on the surface of the brake disc, thus generating a high-frequency sound. This sound is a clear signal to the driver that the friction pads have reached or are close to their wear limit and need to be checked and replaced in time to avoid a decrease in braking performance or potential safety risks.

[0077] In other embodiments, the thickness of the second component segment can be adjusted to suit the needs of different vehicle models, ensuring the applicability and flexibility of the alarm function.

[0078] Specifically, such as Figure 6 As shown, the second connecting segment 22 includes: a first spring 221, the first end of which is connected to the second end of the spring body 20, and the second end of which is bent and disposed on the outside of the third connecting segment 23; a second spring 222, the first end of which is connected to the spring body 20, and the second end of which is bent and disposed on the outside of the third connecting segment 23, and connected to the second end of the first spring 221; and a connector 223, the first end of which is connected to the connection between the first spring 221 and the second spring 222, the second end of which is bent outward away from the connection to form a hook, and the second end of which overlaps with one side of the brake bracket 1; wherein, along the width direction of the spring body 20, the third connecting segment 23 is located between the first spring 221 and the second spring 222. In this embodiment, the first spring 221 and the second spring 222 work together to provide additional support force, ensuring a smooth transition of the friction plate 4 during the return process.

[0079] The first end of the first reed 221 is directly and firmly connected to the second end of the spring body 20 of the return spring. The second end of the first reed is designed as a bent structure. Similarly, the first end of the second reed is also connected to the spring body. Its second end is also designed as a bent structure and is located on the outside of the third section and connected to the second end of the first reed, forming a stable structural frame, which further enhances the fatigue resistance and strength of the entire return spring assembly.

[0080] The first end of the connector is connected to the junction of the first spring 221 and the second spring 222, serving to tightly bind the two springs together. The second end of the connector is bent outward away from the junction to form a hook structure. This innovative hook structure allows the connector to overlap with one side of the brake bracket 1, providing a stable anchor point. The hook design ensures that even under extreme operating conditions, the return spring remains connected to the bracket and will not disengage due to vibration or impact, while also facilitating the installation and removal of the return spring assembly.

[0081] Along the width of the spring body 20, the third connecting section 23 is cleverly arranged between the first spring 221 and the second spring 222. This arrangement ensures that the third connecting section can smoothly perform its function, namely, to contact the brake disc to issue an alarm signal when the friction pad is excessively worn, without being disturbed by the adjacent springs.

[0082] Overall, the design of the double spring and connecting parts in the second connecting section, as well as the precise positioning of the third connecting section, together constitute a key part of the return spring assembly. This not only ensures the stability and reliability of the return spring during braking and return, but also provides a solid foundation for the realization of the friction plate wear alarm function.

[0083] Specifically, such as Figure 4 , Figure 5 , Figure 7 As shown, the elastic retaining ring 3 includes: a retaining ring body 30, with a plurality of first limiting members 32 disposed on one side of the retaining ring body 30, the plurality of first limiting members 32 being spaced apart along the length direction of the retaining ring body 30, and a second limiting member 31 disposed on the other side of the retaining ring body 30, the first limiting members 32 and the second limiting members 31 being disposed opposite to each other, and the first limiting members 32 and the second limiting members 31 being connected to the brake bracket 1. The first limiting members 32 and the second limiting members 31, through their connection with the brake bracket 1, form a stable frame, constraining the movement range of the friction plate 4, and effectively limiting the lateral movement of the friction plate 4.

[0084] Specifically, the elastic retaining ring 3 further includes: a fourth connecting segment 33, one end of which is connected to one end of the retaining ring body 30, and the other end of which extends away from the retaining ring body 30 and is bent outward to form a flange structure 34; a fifth connecting segment 35, one end of which supports the spring 36 and is connected to the other end of the retaining ring body 30, and the other end of which extends away from the retaining ring body 30, and the fifth connecting segment 35 and the fourth connecting segment 33 are arranged opposite to each other; wherein, a clearance portion 37 is formed between the fifth connecting segment 35 and the fourth connecting segment 33, and the second end of the third connecting segment 23 is located in the clearance portion 37 and abuts against the second limiting member 31.

[0085] Optionally, the fourth connecting segment 33 is a key component of the elastic retaining ring. One end of the fourth connecting segment is tightly connected to one end of the retaining ring body 30, while the other end extends outward to form a flange structure 34. The purpose of this flange structure is to provide a stable limiting point, and its outward bending design helps to increase the structural stability of the retaining ring and prevent unnecessary deformation or movement during braking operations.

[0086] Specifically, the fifth connecting segment 35 is positioned opposite to the fourth connecting segment, with one end connected to the other end of the retaining ring body 30, and the other end extending outward to form a structural layout opposite to the fourth connecting segment. The design of the fifth connecting segment also takes into account structural stability and strength. Together with the fourth connecting segment, it forms the outer support frame of the elastic retaining ring, ensuring the rigidity of the elastic retaining ring during assembly and use.

[0087] The relative arrangement between the fourth connecting segment 33 and the fifth connecting segment 35 forms a clearance portion 37. This space exists to resolve potential interference between the return spring and the elastic retaining ring. The clearance portion design allows the second end of the third connecting segment 23 to be embedded therein and abut against the second limiting member 31 located within the clearance portion. This design ensures that the return spring has sufficient freedom of movement during operation and is not restricted by other parts of the elastic retaining ring. At the same time, the contact between the second limiting member and the third connecting segment provides positioning and limiting functions, ensuring the correct position and working state of the return spring.

[0088] Specifically, such as Figure 9As shown, at least one mounting groove 110 is provided in the mounting cavity 10. The snap ring body 30 is fitted to the bottom of the mounting groove 110. The fourth connecting section 33 and the fifth connecting section 35 are fitted to the groove walls on both sides of the mounting groove 110, respectively. The flange structure 34 is connected to the brake bracket 1. The snap ring body is tightly fitted to the bottom of the mounting groove, ensuring the stable positioning of the snap ring in the vertical direction. It also provides the snap ring with the main support point, enabling it to withstand the load from the friction plate and the influence of the return spring. The flange structure, as the terminal part of the fourth connecting section, is designed with an outward bending shape. This structure can establish a firm connection with the brake bracket. The connection between the flange structure and the brake bracket not only provides an additional fixing point, enhancing the rigidity of the entire system, but also ensures that the elastic snap ring will not undergo accidental displacement or deformation when subjected to the force from the return spring.

[0089] It should be further explained that the brake bracket includes a first side 11 and a second side 12. The first side 11 and the second side 12 are disposed on the outer surface of the mounting groove 110. The first limiting member 32 is connected to the first side 11, and the flange structure 34 is connected to the second side 12.

[0090] Specifically, a support spring 36 is provided on the side of the fourth connecting segment 33 away from the mounting groove 110. One end of the support spring 36 is connected to the fourth connecting segment 33, and the other end of the support spring 36 extends along the width direction of the fourth connecting segment 33. A gap is maintained between the support spring 36 and the fourth connecting segment 33. This gap ensures that the support spring has sufficient room to move when in operation, allowing it to deform according to the movement of the friction plate. This design not only avoids interference or friction caused by direct contact between the support spring and the fourth connecting segment, but also ensures that the support spring can freely compress or recover when necessary, thereby effectively assisting the return process of the friction plate.

[0091] Specifically, both the return spring 2 and the elastic retaining ring 3 are integrally bent and formed. This integral molding design simplifies the manufacturing process and reduces production costs. This design utilizes the plastic deformation capability of metal materials and achieves the one-time molding of the complex structure of the return spring 2 and the elastic retaining ring 3 through a precise bending process.

[0092] According to one aspect of the embodiments of this application, a vehicle is provided, including a disc brake, wherein the disc brake is any of the disc brakes described in the above embodiments.

[0093] The technical solution of this application has the following technical effects:

[0094] This utility model provides a disc brake friction pad return mechanism that integrates two friction pad buffer elastic retaining rings and two return springs, innovatively solving the problems of friction pad drag and wear alarm in traditional brakes. The elastic retaining rings effectively reduce friction during friction pad movement, prevent impact noise, and improve braking comfort. The return springs, mounted on the friction pad support ears, ensure precise friction pad return, avoiding uneven wear and drag, significantly reducing drag torque, decreasing overall vehicle energy consumption, and extending friction pad life. In particular, the ingenious combination of the third connecting section and the elastic retaining ring avoidance part enables accurate monitoring and alarm of wear limits without replacing the entire friction pad assembly, improving economy and maintenance convenience. Overall, through simple yet efficient structural improvements, the performance of the brake is significantly optimized, while reducing system complexity and cost.

[0095] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0096] The terms “first,” “second,” “third,” “fourth,” etc., used in this application are used to distinguish similar objects if they exist, and are not necessarily used to describe a specific order or sequence.

[0097] In this application, the term "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, "suspension structure and / or B" can represent: the existence of the suspension structure alone, the existence of both the suspension structure and B, or the existence of B alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

Claims

1. A disc brake, characterized in that, include: A brake bracket (1) having a mounting cavity (10); The return spring assembly is located in the mounting cavity (10). The return spring assembly includes a return spring (2) and an elastic retaining ring (3). The elastic retaining ring (3) is mounted on the brake bracket (1). The elastic retaining ring (3) has a relief portion (37). Part of the return spring (2) is located in the relief portion (37). One end of the return spring (2) is abutted against the elastic retaining ring (3). The other end of the return spring (2) is connected to the friction plate (4).

2. The disc brake according to claim 1, characterized in that, The return spring (2) includes: A spring body (20) is fitted to the mounting surface of the friction plate (4). The spring body (20) has a first connecting section (21), a second connecting section (22), and a third connecting section (23). The first end of the first connecting section (21) is connected to the first end of the spring body (20), and the second end of the first connecting section (21) is connected to the friction plate (4). The first end of the second connecting section (22) is connected to the second end of the spring body (20), and the second end of the second connecting section (22) overlaps with the brake bracket (1). The first end of the third connecting section (23) is connected to the second end of the spring body (20). The third connecting section (23) is located between the first connecting section (21) and the second connecting section (22), and the second end of the third connecting section (23) protrudes towards the braking surface of the friction plate (4).

3. The disc brake according to claim 2, characterized in that, Within the first preset distance range of the movement of the friction pad (4), the second end of the third connecting section (23) is spaced apart from the brake disc (5). When the movement of the friction pad (4) is greater than the first preset distance range, the friction pad (4) can drive the second end of the third connecting section (23) to move synchronously, so that the end of the second end of the third connecting section (23) contacts the brake disc (5) to emit an alarm sound.

4. The disc brake according to claim 2, characterized in that, The second connecting segment (22) includes: The first spring (221) has a first end connected to the second end of the spring body (20), and the second end of the first spring (221) is bent and disposed on the outside of the third connecting section (23); The second spring (222) has its first end connected to the spring body (20) and its second end bent and disposed on the outside of the third connecting section (23), and connected to the second end of the first spring (221). The connector (223) has a first end connected to the connection between the first spring (221) and the second spring (222), and a second end bent outward away from the connection to form a hook. The second end of the connector (223) overlaps with one side of the brake bracket (1). The third connecting segment (23) is located between the first spring (221) and the second spring (222) along the width direction of the spring body (20).

5. The disc brake according to claim 2, characterized in that, The elastic retaining ring (3) includes: The snap ring body (30) has a plurality of first limiting members (32) on one side, which are spaced apart along the length of the snap ring body (30). The snap ring body (30) has a second limiting member (31) on the other side, which is opposite to the first limiting member (32) and the second limiting member (31). The first limiting member (32) and the second limiting member (31) are connected to the brake bracket (1).

6. The disc brake according to claim 5, characterized in that, The elastic retaining ring (3) also includes: The fourth connecting segment (33) has one end connected to one end of the snap ring body (30), and the other end of the fourth connecting segment (33) extends away from the snap ring body (30) and bends outward to form a flange structure (34). The fifth connecting segment (35) has one end connected to the other end of the snap ring body (30), and the other end of the fifth connecting segment (35) extends away from the snap ring body (30). The fifth connecting segment (35) is arranged opposite to the fourth connecting segment (33). The fifth connecting segment (35) and the fourth connecting segment (33) form a clearance portion (37), and the second end of the third connecting segment (23) is located in the clearance portion (37) and abuts against the second limiting member (31).

7. The disc brake according to claim 6, characterized in that, At least one mounting groove (110) is provided in the mounting cavity (10). The snap ring body (30) is fitted to the bottom of the mounting groove (110). The fourth connecting section (33) and the fifth connecting section (35) are fitted to the groove walls on both sides of the mounting groove (110). The flange structure (34) is connected to the brake bracket (1).

8. The disc brake according to claim 7, characterized in that, A support spring (36) is provided on the side of the fourth connecting segment (33) away from the mounting groove (110). One end of the support spring (36) is connected to the fourth connecting segment (33), and the other end of the support spring (36) extends along the width direction of the fourth connecting segment (33). The support spring (36) and the fourth connecting segment (33) are provided with a gap.

9. The disc brake according to claim 1, characterized in that, The return spring (2) and the elastic retaining ring (3) are both integrally bent and formed.

10. A vehicle comprising a disc brake, characterized in that, The disc brake is the disc brake as described in any one of claims 1 to 9.

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