Return spring and disc brake
By designing a simple return spring, the problems of brake pad return drag and noise in disc brakes were solved, achieving reliable brake pad return and noise suppression, thus improving brake performance and the overall vehicle user experience.
Patent Information
- Application Number
- CN202520045446.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-09
AI Technical Summary
The brake pads of existing disc brakes are prone to dragging during the return process, which causes noise and affects braking performance and the driving range of new energy vehicles.
A simple return spring is used, which provides a comprehensive and reliable return force through the design of the elastic body and elastic arm, ensuring that the brake block returns effectively. The multi-directional contact between the plug and the slot suppresses the movement of the brake block and reduces noise.
It effectively avoids brake pad return drag, improves brake reliability and user comfort, reduces noise, and enhances the overall vehicle user experience.
Smart Images
Figure CN223594823U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of braking equipment technology, and in particular to a return spring and a disc brake. Background Technology
[0002] With the rapid development of new energy vehicles, the requirements for braking systems are becoming increasingly stringent. Taking disc brakes as an example, the return performance of the brake pads in the caliper after braking is a crucial factor affecting the performance of disc brakes. A common problem during the return process is brake pad drag. This drag prevents the brake pads from returning to their proper position at the expected time, sometimes even maintaining contact and friction with the brake disc. Over time, this significantly impacts the braking performance of disc brakes and affects the driving range of new energy vehicles.
[0003] In existing technologies, the separation and return of the brake pads are generally achieved through structures such as return springs in the brake. However, the current return spring structure is complex and the return force is not fully provided. If the return force is not fully provided, the brake pads cannot be driven to return in a timely and effective manner, causing the brake pads to drag during return. During the process, the brake pads will also generate noise, which is not conducive to the reliable and effective use of the brake. Utility Model Content
[0004] The purpose of this invention is to provide a return spring and a disc brake, which has a simple structure, can provide more comprehensive and reliable return force, ensures reliable and effective return action of the brake block, and effectively suppresses braking noise.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A return spring is disposed within a disc brake, the disc brake including a caliper and two brake blocks disposed on the caliper, the two brake blocks being spaced apart on both sides of the brake disc along a first direction, and the distance between the two brake blocks being adjustable along the first direction; the return spring includes:
[0007] An elastic body, the first end of which is fixedly disposed on the clamp body;
[0008] Elastic arms are arranged in pairs along a first direction on opposite sides of the second end of the elastic body. Each pair of elastic arms corresponds to one of the two braking blocks. Each elastic arm has a plug at its end, and each braking block has a slot. The plug is inserted into the corresponding slot.
[0009] Along the first direction, the plug can abut against the outer wall of the slot;
[0010] Along the second direction, the plug can abut against the opposite side walls of the slot;
[0011] Along a third direction, the plug can abut against the bottom of the slot.
[0012] Preferably, a guide pin is provided between the two brake blocks, the brake blocks are slidably connected to the guide pin, and the elastic body is located between the guide pin and the clamp body.
[0013] Preferably, the elastic body has a groove, and the guide pin passes through the groove.
[0014] Preferably, the bottom of the groove is set to be arc-shaped, and the arc-shaped bottom of the groove is used to fit and contact the outer wall of the guide pin.
[0015] Preferably, the elastic arm includes at least one buffer arm portion, which is U-shaped and bent.
[0016] Preferably, both elastic arms include the buffer arm portion, and the buffer arm portions of the two elastic arms are arranged symmetrically.
[0017] Preferably, the elastic arm further includes an extension arm that extends to the outermost end of the buffer arm portion, the first end of the extension arm being connected to the buffer arm portion, and the two extension arms being inclined from the first end to the second end toward each other.
[0018] The second end of the extended arm is provided with the plug, the first end of the plug is connected to the second end of the extended arm, and the two plugs are inclined from the first end to the second end toward each other.
[0019] Preferably, the elastic arm further includes a limiting head extending from the second end of the extended arm portion, the limiting head being disposed at an angle to the plug, and the limiting head being used to abut against the brake block together with the outer surface of the plug.
[0020] Preferably, the elastic body, the buffer arm, the extension arm, the plug, and the limiting head are integrally formed.
[0021] A disc brake includes a return spring as described in any of the above claims, and also includes a piston disposed on the caliper body. The piston is correspondingly disposed with the brake block, and the piston is used to drive the corresponding brake block to move along a first direction.
[0022] Beneficial effects:
[0023] The disc brake provided by this utility model utilizes the aforementioned return spring. The first direction is the spacing direction between the two brake pads, which is also the axial direction of the brake disc. The second direction is one of the radial directions of the brake disc, corresponding to the height direction of the vehicle when the disc brake is installed on the vehicle. The third direction is another radial direction of the brake disc, corresponding to the length direction of the vehicle when the disc brake is installed on the vehicle. When the disc brake is working, the two brake discs move towards each other to press against each other. During the pressing process, the return spring gradually deforms and generates elastic force to provide a return force to the brake pads. Specifically, along the first direction, the outer groove wall of the slot can press inward against the corresponding plug as the two brake discs approach each other, so that the plug can generate a lateral pressure along the axial direction of the brake disc on the outer groove wall of the corresponding side slot, denoted as F1; along the third direction, the bottom of the slot can press against the end of the plug, so that the plug can generate a downward pressure along the third direction on the bottom of the slot, denoted as F2. Under the combined action of F1 and F2, the two brake pads can be effectively driven to move away from each other, thereby driving them away from the brake disc and effectively preventing brake pad return drag. Furthermore, during the deformation process, the return spring is compressed along the first direction, and the distance between the elastic arm and the bottom of the slot along the third direction (i.e., the height between the top of the elastic arm and the bottom of the slot) remains constant. Since the first end of the elastic body is fixed to the caliper, the elastic arm at the second end of the elastic body tends to swing outwards during the compression of the two brake pads. At this time, along the second direction, the side wall of the slot can press against the plug, and the plug can generate lateral pressure on the side wall of the corresponding slot, denoted as F3. Under the action of F3, the movement of the brake pads along the second direction can be effectively suppressed, reducing braking noise and enhancing the comfort and user experience of using disc brakes in the vehicle. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of the disc brake provided by this utility model;
[0025] Figure 2 This is a partial structural schematic diagram of the disc brake provided by this utility model;
[0026] Figure 3 This utility model is based on Figure 2 A magnified view of a portion of point A in the middle;
[0027] Figure 4 This is a schematic diagram of the structure of the return spring provided by this utility model;
[0028] Figure 5 This is a schematic diagram of the force acting on the return spring provided by this utility model from one perspective;
[0029] Figure 6This is a force diagram of the return spring provided by this utility model from another perspective.
[0030] In the picture:
[0031] 1. Return spring; 11. Elastic body; 111. Groove; 12. Elastic arm; 121. Buffer arm; 122. Extension arm; 123. Plug; 124. Limiting head; 13. Locking head;
[0032] 2. Brake disc; 3. Brake block; 31. Slot; 4. Guide pin; 5. Clamp body; 51. Slot; 6. Piston. Detailed Implementation
[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0037] This embodiment provides a disc brake. (Refer to...) Figures 1 to 6 As shown, the disc brake includes a caliper body 5, a piston 6, and brake blocks 3. Both brake blocks 3 and piston 6 are mounted on the caliper body 5. Two brake blocks 3 are provided; a brake disc 2 is disposed within the caliper body 5. The two brake blocks 3 are spaced apart on both sides of the brake disc 2 along a first direction, and the distance between the two brake blocks 3 can be adjusted along the first direction. Piston 6 is correspondingly positioned to the brake blocks 3, and piston 6 drives the corresponding brake block 3 to move along the first direction. Specifically, the movement of piston 6 causes the two brake blocks 3 to move closer to each other, pressing against the brake disc 2 to brake it. The movement of the two brake blocks 3 closer to each other releases the pressure on the brake disc 2, thus releasing the brake on the brake disc 2.
[0038] In this embodiment, the return spring 1 includes an elastic body 11 and elastic arms 12. The first end of the elastic body 11 is fixedly mounted on the clamp body 5. The elastic arms 12 are arranged in pairs on opposite sides of the second end of the elastic body 11 along a first direction. The two elastic arms 12 are correspondingly arranged with the two brake blocks 3. The ends of the elastic arms 12 are provided with plugs 123. The brake blocks 3 are provided with slots 31, and the plugs 123 are inserted into the corresponding slots 31. Specifically, along the first direction, the plugs 123 can abut against the outer wall of the slot 31; along the second direction, the plugs 123 can abut against the opposite side walls of the slot 31; and along the third direction, the plugs 123 can abut against the bottom of the slot 31.
[0039] Specifically, the first, second, and third directions are arranged orthogonally to each other. In the diagram, the first direction is the spacing between the two brake blocks 3, which is also the axial direction of the brake disc 2. The second direction is one of the radial directions of the brake disc 2, corresponding to the height direction of the vehicle when the disc brake is installed. The third direction is another radial direction of the brake disc 2, corresponding to the length direction of the vehicle when the disc brake is installed.
[0040] In this embodiment, when the disc brake is working, the two brake discs 2 move towards each other to press against each other. During the pressing process, the return spring 1 gradually deforms and generates an elastic force to provide a return force to the brake block 3. Specifically, refer to... Figures 5 to 6As shown, along the first direction, the outer wall of the slot 31 can press inward against the corresponding plug 123 as the two brake discs 2 approach each other, so that the plug 123 can generate a lateral pressure along the axial direction of the brake disc 2 on the outer wall of the corresponding slot 31, denoted as F1; along the third direction, the bottom of the slot 31 can press against the end of the plug 123, so that the plug 123 can generate a downward pressure along the third direction on the bottom of the slot 31, denoted as F2. Under the combined action of F1 and F2, the two brake blocks 3 can be effectively driven to move away from each other, thereby driving the two brake blocks 3 away from the brake disc 2, effectively avoiding the problem of brake block 3 returning to its original position and dragging. Furthermore, during the deformation process, the return spring 1 is compressed along the first direction, and the distance between the elastic arm 12 and the bottom of the slot 31 along the third direction, i.e., the height between the top of the elastic arm 12 and the bottom of the slot 31, remains unchanged. Since the first end of the elastic body 11 is fixed to the caliper 5, during the compression of the two brake blocks 3, the elastic arm 12 at the second end of the elastic body 11 tends to swing outwards. At this time, along the second direction, the side wall of the slot 31 can press against the plug 123, causing the plug 123 to generate lateral pressure on the side wall of the corresponding slot 31, denoted as F3. Under the action of F3, the movement of the brake block 3 along the second direction can be effectively suppressed, reducing braking noise and enhancing the comfort and user experience of the disc brake in the vehicle.
[0041] Specifically, the caliper body 5 is equipped with a piston cylinder. During the operation of the disc brake, the braking pressure is provided by the master cylinder. As the pressure inside the piston cylinder bore of the caliper body 5 increases, the piston moves along the piston bore inside the caliper body 5. With the movement of the piston, the piston eventually acts on the brake block 3 on the corresponding side, causing the two brake blocks 3 to move towards each other and finally press against both sides of the brake disc 2, generating braking torque on the brake disc 2, so that the vehicle decelerates or stops.
[0042] In this embodiment, a guide pin 4 passes through the two brake blocks 3, and the brake blocks 3 are slidably connected to the guide pin 4. The elastic body 11 is located between the guide pin 4 and the clamp body 5. Specifically, the guide pin 4 extends along a first direction, and a through hole is provided on the brake block 3, through which the guide pin 4 passes. The guide pin 4 provides sliding guidance for the brake blocks 3, allowing the two brake blocks 3 to move closer or further away from each other strictly along the first direction. In addition, the elastic body 11 is located between the guide pin 4 and the clamp body 5, and the guide pin 4 can also limit the elastic body 11 to a certain extent, ensuring that the elastic body 11 is reliably and stably installed.
[0043] Specifically, the elastic body 11 has a groove 111 through which the guide pin 4 passes. Specifically, the bottom of the groove 111 is arc-shaped, and this arc-shaped bottom is designed to fit snugly against the outer wall of the guide pin 4. The arc-shaped bottom of the groove 111 better fits the outer periphery of the guide pin 4, thus achieving a better fit. This snug contact between the guide pin 4 and the groove 111 further ensures reliable and stable installation of the elastic body 11.
[0044] In this embodiment, the first end of the elastic body 11 is provided with a locking head 13, and the clamp body 5 is provided with a corresponding locking groove 51 that can be fixedly engaged with the locking head 13. Specifically, the fixed connection between the first end of the elastic body 11 and the clamp body 5 is achieved through the engagement between the locking head 13 and the locking groove 51.
[0045] In this embodiment, the elastic arm 12 includes at least one buffer arm portion 121, which is U-shaped. In the accompanying drawings of this embodiment, each elastic arm 12 includes two buffer arms 121. By providing buffer arms 121, the layout space is saved while ensuring the effective length of the elastic arm 12. Reducing the length of the elastic arm 12 ensures that a sufficient elastic area is provided, thus ensuring that the elastic arm 12 can exert reliable and effective elasticity, suitable for applying a return force to the brake block 3.
[0046] In this embodiment, both elastic arms 12 include a buffer arm portion 121, and the buffer arm portions 121 of the two elastic arms 12 are symmetrically arranged. This arrangement ensures that the return force provided by the two elastic arms 12 of each return spring to the corresponding brake block 3 remains uniform, avoiding uneven return force provided by the elastic arms 12 on both sides.
[0047] Specifically, the elastic arm 12 also includes an extension arm 122 extending from the end of the outermost buffer arm 121. The first end of the extension arm 122 is connected to the buffer arm 121, and the two extension arms 122 are inclined from the first end to the second end in a direction away from each other. The second end of the extension arm 122 is provided with a plug 123, the first end of the plug 123 is connected to the second end of the extension arm 122, and the two plugs 123 are inclined from the first end to the second end in a direction closer to each other. Specifically, the two extension arms 122 and the two plugs 123 on the elastic arm 12 are symmetrically arranged. Specifically, along the first direction, the outer groove wall of the slot 31 that abuts against the plug 123 is also inclined, so that the plug 123 can fit against the inclined outer groove wall of the slot 31. This arrangement increases the contact area between the plug 123 and the outer groove wall of the slot 31, which is beneficial for the plug 123 to apply force to the outer groove wall of the slot 31.
[0048] Furthermore, the elastic arm 12 also includes a limiting head 124 extending from the second end of the extended arm portion 122. The limiting head 124 is angled with the plug 123 and is used to abut against the brake block 3 together with the outer surface of the plug 123. Specifically, the limiting head 124 and the extended arm portion 122 extend in the same direction, and the limiting head 124 and the plug 123 form an angled clamping structure. This clamping structure can abut against the brake block 3, effectively preventing the elastic arm 12 from separating from the brake block 3 on the corresponding side, further ensuring effective contact between the return spring 1 and the brake block 3, and ensuring the stable application of the return force.
[0049] In this embodiment, the elastic body 11, buffer arm 121, extension arm 122, plug 123, and limiting head 124 are integrally formed. Since the overall structure of the return spring 1 is relatively simple, the elastic body 11, buffer arm 121, extension arm 122, plug 123, and limiting head 124 are integrally formed, which avoids the process of assembling each component separately, avoids the introduction of connecting parts such as bolts and screws, and also avoids the introduction of connection processes such as welding and bonding, thereby improving production efficiency and reducing labor costs.
[0050] In this embodiment, the caliper body 5 of the disc brake is provided with two return springs 1 along the second direction. The two return springs 1 are arranged back to back. This arrangement ensures that each brake block 3 can cooperate with two elastic arms 12, ensuring that the elastic arms 12 reliably and effectively apply a return force to the brake block 3, and that the force is applied evenly.
[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A return spring disposed within a disc brake, the disc brake comprising a caliper (5) and two brake blocks (3) disposed on the caliper (5), the two brake blocks (3) being spaced apart on both sides of a brake disc (2) along a first direction, the two brake blocks (3) being adjustable in distance from each other along the first direction, characterized in that, The return spring includes: An elastic body (11) is provided at its first end on the clamp body (5); Elastic arms (12) are arranged in pairs along a first direction on opposite sides of the second end of the elastic body (11). Each elastic arm (12) corresponds to one of the two brake blocks (3). Each elastic arm (12) has a plug (123) at its end, and each brake block (3) has a slot (31). The plug (123) is inserted into the corresponding slot (31). Along the first direction, the plug (123) can abut against the outer groove wall of the slot (31); Along the second direction, the plug (123) can abut against the opposite side walls of the slot (31); Along a third direction, the plug (123) can abut against the bottom of the slot (31).
2. The return spring according to claim 1, characterized in that, A guide pin (4) is provided between the two brake blocks (3), the brake blocks (3) are slidably connected to the guide pin (4), and the elastic body (11) is located between the guide pin (4) and the clamp body (5).
3. The return spring according to claim 2, characterized in that, The elastic body (11) has a groove (111), and the guide pin (4) passes through the groove (111).
4. The return spring according to claim 3, characterized in that, The bottom of the groove (111) is set to be arc-shaped, and the arc-shaped bottom of the groove (111) is used to fit and contact the outer wall of the guide pin (4).
5. The return spring according to claim 1, characterized in that, The elastic arm (12) includes at least one buffer arm (121) which is U-shaped.
6. The return spring according to claim 5, characterized in that, Both elastic arms (12) include the buffer arm portion (121), and the buffer arm portions (121) of the two elastic arms (12) are arranged symmetrically.
7. The return spring according to claim 5, characterized in that, The elastic arm (12) also includes an extension arm (122) extending from the outermost end of the buffer arm (121), the first end of the extension arm (122) being connected to the buffer arm (121), and the two extension arms (122) being inclined from the first end to the second end toward each other. The second end of the extension arm (122) is provided with the plug (123), the first end of the plug (123) is connected to the second end of the extension arm (122), and the two plugs (123) are inclined from the first end to the second end toward each other.
8. The return spring according to claim 7, characterized in that, The elastic arm (12) further includes a limiting head (124) extending from the second end of the extended arm portion (122). The limiting head (124) is set at an angle to the plug (123). The limiting head (124) is used to abut against the brake block (3) together with the outer side of the plug (123).
9. The return spring according to claim 8, characterized in that, The elastic body (11), the buffer arm (121), the extension arm (122), the plug (123), and the limiting head (124) are integrally formed.
10. A disc brake, characterized in that, The device includes a return spring (1) as described in any one of claims 1-9, and a piston (6) disposed on the clamp body (5). The piston (6) is correspondingly disposed with respect to the brake block (3), and the piston (6) is used to drive the corresponding brake block (3) to move along a first direction.