Return spring, brake caliper and brake

Abstract

The utility model relates to the technical field of vehicles, and provides a return spring, a brake caliper and a brake, the return spring is used for the brake caliper, the brake caliper comprises a caliper support and a brake block movably arranged on the caliper support, the brake block is provided with a preset thickness face and a brake face, and the return spring comprises a clamping part and a return connecting part. The clamping part is used for being matched with a caliper support in a clamping mode, the return connecting part is connected with the clamping part, the return connecting part is used for being connected with the area outside the braking face of the braking block, the return connecting part is used for driving the braking block to move in the first direction, the return connecting part is provided with an alarm end, and the alarm end is used for being coplanar with a preset thickness face. According to the scheme, the problem that in the prior art, the number of parts of brake calipers is large can be solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a return spring, a brake caliper and a brake. Background Art

[0002] The brake is an important component of the automobile braking system, including the brake caliper and brake disc. The brake caliper includes a brake pad, a caliper bracket and a return spring. The brake pad is movably arranged on the caliper bracket. When braking, the brake pad is moved to contact the brake disc through external force, generating friction to decelerate the vehicle. After the external force is released, the elastic force of the return spring drives the brake pad away from the brake disc, reducing the caliper holding force.

[0003] As the brake pads wear, the thickness of the brake pads will become thinner. When the thickness is worn to a certain level, the brake force may be insufficient. Therefore, the brake pads need to be replaced in time. In order to let users know when to replace the brake pads, the brake calipers usually install alarms on the brake pads. When the brake pads are worn to a certain thickness, the alarms sound to remind users to replace the brake pads.

[0004] Therefore, the brake caliper includes a caliper bracket, a brake pad, a return spring and an alarm, and the number of parts is large, which makes the assembly process of the brake caliper more complicated and the assembly cost higher. Utility Model Content

[0005] In view of this, the present application provides a return spring, a brake caliper and a brake to solve the problem of a large number of parts in the brake caliper in the prior art.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A return spring for a brake caliper, the brake caliper comprising a caliper bracket and a brake block movably arranged on the caliper bracket, the brake block having a preset thickness surface and a braking surface, the return spring comprising:

[0008] A clamping portion, used for clamping and cooperating with the caliper bracket;

[0009] A return connection portion is connected to the clamping portion, the return connection portion is used to connect to the area outside the braking surface of the brake block, the return connection portion is used to drive the brake block to move in a first direction, and the return connection portion has an alarm end, and the alarm end is used to be coplanar with the preset thickness surface.

[0010] Optionally, the brake block has ears;

[0011] The return spring also includes a bent portion, which forms a slideway. The inner surface of the slideway is a smooth surface, and the smooth surface is used to fit with the side wall of the ear and to slide with the ear.

[0012] Optionally, the clamping portion includes a groove structure, the groove structure includes a groove bottom and a plurality of groove walls, the plurality of groove walls are connected to the edge of the groove bottom at intervals along the circumference of the groove bottom, so that a gap is formed between any two adjacent groove walls.

[0013] Optionally, the area of ​​the slot opening of the slot structure is smaller than the area of ​​the slot bottom.

[0014] Optionally, the clamping portion and the bending portion are distributed along the height direction of the return spring, and one of the groove walls of the groove structure forms a bending surface of the bending portion.

[0015] Optionally, along the extension direction of the slideway, the bent portion includes an initial end and an end, and the return spring is used to drive the brake block to move toward a direction close to the initial end;

[0016] The first end of the return connection portion is connected to the initial end, the second end of the return connection portion extends along the extension direction of the slideway, and the second end of the return connection portion is partially bent to form a hook, and the hook is used to hook and cooperate with the ear;

[0017] The unbent area of ​​the second end of the return connection portion forms an alarm structure, and the end of the alarm structure forms the alarm end.

[0018] Optionally, the side wall of the ear is provided with an avoidance notch;

[0019] Along the extension direction of the slideway, the return connection portion includes an arc segment and a straight segment, one end of the arc segment is connected to the initial end and forms the first end of the return connection portion, one end of the straight segment is connected to the other end of the arc segment, and the other end of the straight segment forms the second end of the return connection portion;

[0020] The straight section passes through the avoidance notch of the ear, and the arc section and the hook are respectively used to face two opposite surfaces of the ear.

[0021] A brake caliper, comprising the return spring of any one of the above items, a caliper bracket and a brake block movably arranged on the caliper bracket, wherein:

[0022] The caliper bracket is provided with a clamping protrusion, the clamping portion is clamped and connected to the clamping protrusion, the return connection portion is connected to the brake block, the return connection portion can be deformed with the movement of the brake block, and is used to drive the brake block to move in the first direction.

[0023] Optionally, the caliper bracket includes two opposite inner walls, both of which have the clamping protrusions, and both of which are clamped with the return spring via the clamping protrusions;

[0024] Two opposite ends of the brake block are respectively connected to the return connection parts of two opposite return springs on the caliper bracket;

[0025] The number of the brake blocks is two, and the two brake blocks are spaced apart and distributed along the moving direction of the brake blocks.

[0026] A brake comprises the brake caliper and a brake disc as described above, wherein at least a portion of the brake disc is opposite to the braking surface of the brake pad.

[0027] In the embodiment of the present application, an alarm end is designed on the return spring, so that the return spring has both the function of return and the function of an alarm. Therefore, when the return spring in the embodiment of the present application is applied to the brake caliper, the separate alarm can be eliminated, the number of parts of the brake caliper is reduced, and the assembly cost of the brake caliper is reduced. It can be seen that the present application can solve the problem of a large number of parts of the brake caliper in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the structure of a return spring provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the structure of a brake caliper provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the structure of a brake caliper after one of the brake pads is removed according to an embodiment of the present application;

[0032] Figure 4 for Figure 3 A in the enlarged view;

[0033] Figure 5 A schematic diagram of the matching structure of the return spring and the brake block at the first angle provided in an embodiment of the present application;

[0034] Figure 6A schematic diagram of the matching structure of the return spring and the brake block at the second angle provided in an embodiment of the present application.

[0035] exist Figure 1-Figure 6 middle:

[0036] 100, return spring; 110, clamping portion; 111, groove bottom; 112, groove wall; 113, gap;

[0037] 120, return connection part; 121, alarm terminal; 122, hook; 123, arc segment; 124, straight segment;

[0038] 130, bending portion; 131, initial end; 132, terminal end;

[0039] 200, caliper bracket; 210, clamping protrusion; 220, concave-convex surface;

[0040] 300, brake block; 310, bottom plate; 311, ear; 3111, avoidance gap; 320, friction plate. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] like Figure 1 As shown, an embodiment of the present application provides a return spring for a brake caliper, the brake caliper includes a caliper bracket 200 and a brake block 300 movably arranged on the caliper bracket 200, and the brake block 300 has a preset thickness surface and a braking surface. The brake caliper is used for a brake, and the brake also includes a brake disc. The braking surface of the brake block 300 refers to the surface used to contact and rub with the brake disc to achieve braking. The brake block 300 will wear during use, and the wear will cause the braking surface to change. Therefore, the braking surface of the brake block 300 changes with the wear of the brake block 300. The preset thickness surface refers to the surface where the braking surface of the brake block 300 is located when the brake block 300 is worn to the point where it needs to be replaced.

[0043] The return spring 100 provided in the embodiment of the present application includes a clamping portion 110 and a return connecting portion 120 .

[0044] The clamping portion 110 is used to clamp and cooperate with the caliper bracket 200, and the caliper bracket 200 has a clamping protrusion 210 used to cooperate with the clamping portion 110, so that the return spring 100 can be clamped on the caliper bracket 200 through the clamping portion 110. The return spring 100 is elastic, the clamping portion 110 is elastic, and the return spring is clamped on the caliper bracket 200 by using the clamping portion 110, which helps to improve the connection strength between the return spring 100 and the caliper bracket 200.

[0045] In addition, compared with the connection method of using screws and other connecting parts to install the return spring 100 on the caliper bracket 200, the clamping method does not require additional connecting parts. Therefore, clamping the return spring 100 in the present application on the caliper bracket 200 can reduce the number of parts of the brake caliper.

[0046] The return connection part 120 is connected to the clamping part 110, and is used to connect to the area outside the braking surface of the brake block 300 to prevent the return connection part 120 from contacting the brake disc during the braking process after the return spring is applied to the brake, thereby generating abnormal noise. The return connection part 120 is also used to drive the brake block 300 to move in the first direction a.

[0047] When the return spring 100 in the embodiment of the present application is used for a brake caliper, the clamping portion 110 is clamped and connected to the caliper bracket 200, so that the return spring 100 and the caliper bracket 200 are relatively fixed. During the movement of the brake block 300 relative to the caliper bracket 200, the return connection portion 120 is deformed along with the movement of the brake block 300, and the force of the return connection portion 120 to restore the deformation drives the brake block 300 to move in the first direction a.

[0048] The brake caliper is used for the brake, which is an important mechanism of the vehicle braking system and is used for braking and releasing the brake of the vehicle. When the return spring 100 in the present application is used for the brake, the first direction a refers to the moving direction of the brake block 300 when it moves away from the brake disc. When the vehicle needs to brake, the brake block 300 is pushed by external force to contact and rub with the brake disc, thereby generating friction force. The pressure applied to the surface of the brake block 300 is proportional to the braking force, so as to achieve the purpose of decelerating the vehicle. In this process, the return connection part 120 deforms with the movement of the brake block 300, generating a reverse spring force. When the vehicle does not need to brake, the external force is released, the pressure applied to the surface of the brake block 300 is correspondingly released, and the braking force is also basically released. The return connection part 120 is reset, and under the action of its reverse spring force, the brake block 300 is pulled to move in the direction away from the brake disc (i.e., along the first direction a). In this way, the return displacement of the brake block 300 is larger, and the gap between the brake block 300 and the brake disc is increased, which can reduce the friction between the brake block 300 and the brake disc, thereby reducing the drag force of the caliper.

[0049] As the brake pad 300 is used, the brake pad 300 wears and becomes thinner. When the brake pad 300 is worn to a certain thickness, it is necessary to replace the brake pad 300 to avoid safety accidents caused by the brake pad 300 being too thin and affecting the braking performance.

[0050] To this end, in the embodiment of the present application, the return connection portion 120 has an alarm end 121, and the alarm end 121 is used to be coplanar with the preset thickness surface of the brake block 300. When the brake block 300 is worn to its preset thickness surface as a braking surface, the thickness of the brake block 300 is greater than or equal to the minimum thickness of the brake block 300 that meets the braking requirements.

[0051] When the return spring 100 is used for a brake, as the brake block 300 wears, when the brake block 300 is worn to its preset thickness surface as a braking surface, the alarm end 121 is coplanar with the preset thickness surface, and when the brake block 300 contacts the brake disc, the alarm end 121 also contacts the brake disc and emits a shrill screaming sound, reminding the user to replace the brake block 300.

[0052] In the embodiment of the present application, an alarm terminal 121 is designed on the return spring 100, so that the return spring 100 has both the function of return and the function of an alarm. Therefore, when the return spring 100 in the embodiment of the present application is applied to a brake caliper, a separate alarm can be eliminated, the number of parts of the brake caliper is reduced, the structure of the brake caliper is simplified, the cost of the brake caliper is reduced, and the process of installing a separate alarm can be omitted, thereby reducing the assembly cost of the brake caliper. It can be seen that the present application can solve the problem of a large number of parts of the brake caliper in the prior art.

[0053] The brake block 300 may include a base plate 310 and a friction plate 320, which are stacked and connected along the thickness direction of the brake block 300. The thickness direction of the brake block 300 is consistent with the moving direction of the brake block 300. The surface of the friction plate 320 facing away from the base plate 310 forms a braking surface, and the edge of the base plate 310 is protruding with an ear 311 coplanar therewith.

[0054] The return spring 100 may also include a bent portion 130, which forms a slideway. The inner surface of the slideway is a smooth surface, which is used to fit with the side wall of the ear 311 and to slide with the ear 311. In this case, when the return spring 100 is applied to the brake caliper, the brake block 300 realizes its movement relative to the return spring 100 through the sliding cooperation between the ear 311 and the slideway. Because the return spring 100 and the caliper bracket 200 are relatively fixed in position, the brake block 300 realizes movable cooperation with the caliper bracket 200 through the sliding cooperation between the ear 311 and the slideway. The surface of the slideway used to cooperate with the ear 311 is a smooth surface, which makes the sliding of the brake block 300 smoother. When the return spring 100 is used in the brake caliper, the extension direction of the slideway is consistent with the moving direction of the brake block 300.

[0055] Optionally, the return spring 100 may be made of stainless steel, which has a smooth surface and a small friction coefficient. Alternatively, the return spring 100 may be made of other elastic materials, and a smooth coating may be applied to the surface of the return spring 100 to achieve a smooth slide surface.

[0056] The clamping portion 110 may include a groove structure, which may include a groove bottom 111 and a plurality of groove walls 112. The plurality of groove walls 112 may be connected to the edge of the groove bottom 111 at intervals along the circumference of the groove bottom 111, so that a gap 113 is formed between any two adjacent groove walls 112. Specifically, the groove structure may include a groove bottom 111 and four groove walls 112. The groove bottom 111 may be rectangular, and the four groove walls 112 may be connected to the four sides of the groove bottom 111, respectively.

[0057] The groove walls 112 are elastic, and there are gaps 113 between adjacent groove walls 112 , so that each groove wall 112 of the clamping portion 110 can be deformed to adapt to the shape of the clamping protrusion 210 of the caliper bracket 200 .

[0058] When the groove structure is in a natural state, that is, not subject to any external force, the volume of the internal space of the groove structure can be smaller than the volume of the clamping protrusion 210 of the caliper bracket 200, thereby achieving a more secure clamping of the clamping portion 110 and the clamping protrusion 210.

[0059] The notch of the groove structure is opposite to the groove bottom 111. In a further technical solution, the area of ​​the notch of the groove structure can be smaller than the area of ​​the groove bottom 111. In this case, it is easier for the clamping portion 110 to be detached from the clamping protrusion 210, thereby making the connection between the clamping portion 110 and the clamping protrusion 210 more secure, and further making the connection between the return spring 100 and the caliper bracket 200 more secure.

[0060] In the embodiment of the present application, the clamping portion 110 and the bending portion 130 can be distributed along the height direction b of the return spring 100, and one of the groove walls 112 of the groove structure can form a bending surface of the bending portion 130. In this case, the groove structure and the bending portion 130 share one surface, and one surface serves two purposes, thereby simplifying the structure of the return spring 100.

[0061] In the above scheme, the return connection part 120 is used to connect to the area of ​​the brake block 300 away from the braking surface, and the alarm end 121 is used to be coplanar with the preset thickness surface. In order to realize the above scheme, in an optional embodiment, the return connection part 120 can be fixed on the surface of the brake block 300 away from the braking surface by bonding or welding, and the alarm end 121 can extend from the surface of the brake block 300 away from the braking surface into the interior of the brake block 300 and extend to the preset thickness surface.

[0062] In another optional embodiment, along the extension direction of the slide, the bending portion 130 may include an initial end 131 and an end 132, and the return spring 100 is used to drive the brake block 300 to move toward the direction close to the initial end 131. In other words, the direction from the end 132 to the initial end 131 is consistent with the first direction a.

[0063] The first end of the return connection part 120 can be connected to the initial end 131, the second end of the return connection part 120 can extend along the extension direction of the slideway, and the second end of the return connection part 120 can be partially bent to form a hook 122, and the hook 122 is used to hook and cooperate with the ear part 311. Optionally, the hook 122 can be used to hook with the surface of the ear part 311 facing the brake disc. In this case, the connection between the return connection part 120 and the brake block 300 does not require an additional connector, which can further reduce the number of parts of the brake caliper.

[0064] The unbent area of ​​the second end of the return connection portion 120 forms an alarm structure, and the end of the alarm structure forms an alarm end 121. In this way, when the return spring is applied to the brake caliper (or brake), the alarm end 121 is located on the surface of the ear 311 facing the braking surface (or facing the brake disc), and protrudes from the ear 311 in the direction of the braking surface (or toward the brake disc), and the length of the alarm structure can be greater than or equal to the minimum thickness of the friction plate 320 that meets the braking performance.

[0065] In the above scheme, the side wall of the ear 311 is used to fit with the slide (that is, the inner surface of the bending portion 130), and the second end of the return connection portion 120 extends along the extension direction of the slide, and is used to pass through the ear 311 and hook with the side surface of the ear 311 facing the braking surface. Therefore, the side wall of the ear 311 is provided with an avoidance notch 3111.

[0066] Along the extension direction of the slide, the return connection part 120 may include an arc segment 123 and a straight segment 124, one end of the arc segment 123 is connected to the initial end 131 and forms the first end of the return connection part 120, one end of the straight segment 124 is connected to the other end of the arc segment 123, the straight segment 124 passes through the avoidance gap 3111 of the ear 311, and the other end of the straight segment 124 forms the second end of the return connection part 120, the arc segment 123 and the hook 122 are respectively used to be opposite to the two opposite surfaces of the ear 311.

[0067] In this case, after the return spring 100 is used for the brake caliper, along the moving direction of the brake block 300, the arc segment 123 and the hook 122 block the brake block 300 in two directions respectively, preventing the brake block 300 from excessively moving and detaching from the caliper bracket 200.

[0068] Based on the above return spring, the embodiment of the present application also provides a brake caliper, such as Figures 2 to 6 The brake caliper includes the above-mentioned return spring. Since the brake caliper has the above-mentioned return spring, the beneficial effects of the brake caliper brought by the return spring can be found in the above content and will not be repeated here.

[0069] The brake caliper includes the above-mentioned return spring 100, and also includes a caliper bracket 200 and a brake block 300 movably arranged on the caliper bracket 200. The caliper bracket 200 is provided with a clamping protrusion 210, the clamping portion 110 is clamped and connected to the clamping protrusion 210, the return connection portion 120 is connected to the brake block 300, and the return connection portion 120 can be deformed with the movement of the brake block 300, and is used to drive the brake block 300 to move in the first direction a.

[0070] It should be noted that the structure of the caliper bracket 200 is the same as the structure mentioned above, and the matching relationship among the caliper bracket 200, the return spring 100 and the brake block 300 is the same as the matching relationship mentioned above.

[0071] In a further technical solution, the caliper bracket 200 may include two opposite inner walls, both of which may have a clamping protrusion 210, and both of which may be clamped with a return spring 100 through the clamping protrusion 210. The two opposite ends of the brake block 300 may be respectively connected to the return connection parts 120 of the two opposite return springs 100 on the caliper bracket 200. The inner wall of the caliper bracket 200 may also be provided with a concave-convex surface 220, and the concave-convex surface 220 is in contact with the outer surface of the bent portion 130 of the return spring 100.

[0072] There are two brake blocks 300, and the two brake blocks 300 are spaced apart along the moving direction of the brake blocks 300. In this case, both ends of the brake blocks 300 are connected to the return connection part 120, and the brake caliper has two brake blocks 300. In this way, the thickness of the four ends of the two brake blocks 300 can be monitored at the same time, and the point with the fastest wear will alarm first, avoiding the risk of not reminding to replace the brake block 300 in time due to abnormal wear, realizing the alarm of the brake caliper more accurately and sensitively, and no additional alarm is needed, reducing costs.

[0073] In addition, in the embodiment of the present application, the structures of the brake blocks 300 are the same, and no additional alarm needs to be installed, which improves the commonality of the brake blocks 300 of the brake caliper and reduces the cost.

[0074] Based on the above-mentioned brake caliper, an embodiment of the present application further provides a brake, which includes the above-mentioned brake caliper and a brake disc, at least a portion of the brake disc is opposite to the braking surface of the brake block 300, and the brake block 300 and the brake disc are in contact and friction with each other to achieve braking. Since the brake has the above-mentioned brake caliper, the beneficial effects of the brake brought by the brake caliper can be found in the above content and will not be repeated here.

[0075] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0076] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0077] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0078] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0079] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0080] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A return spring, characterized in that: Used for a brake caliper, the brake caliper comprises a caliper bracket (200) and a brake block (300) movably arranged on the caliper bracket (200), the brake block (300) having a preset thickness surface and a braking surface, and the return spring (100) comprises: A clamping portion (110) used for clamping and cooperating with the caliper bracket (200); A return connection portion (120) is connected to the clamping portion (110), the return connection portion (120) is used to connect to the area outside the braking surface of the brake block (300), the return connection portion (120) is used to drive the brake block (300) to move in the first direction (a), and the return connection portion (120) has an alarm end (121), and the alarm end (121) is used to be coplanar with the preset thickness surface.

2. The return spring according to claim 1, characterized in that: The brake block (300) has an ear (311); The return spring (100) further comprises a bent portion (130), wherein the bent portion (130) forms a slideway, wherein the inner surface of the slideway is a smooth surface, and the smooth surface is used to fit with the side wall of the ear (311) and to slide with the ear (311).

3. The return spring according to claim 2, characterized in that: The clamping portion (110) comprises a groove structure, wherein the groove structure comprises a groove bottom (111) and a plurality of groove walls (112), wherein the plurality of groove walls (112) are connected to the edge of the groove bottom (111) at intervals along the circumference of the groove bottom (111), so that a gap (113) is formed between any two adjacent groove walls (112).

4. The return spring according to claim 3, characterized in that: The area of ​​the slot opening of the slot structure is smaller than the area of ​​the slot bottom (111).

5. The return spring according to claim 3, characterized in that: The clamping portion (110) and the bending portion (130) are distributed along the height direction (b) of the return spring (100), and one of the groove walls (112) of the groove structure forms a bending surface of the bending portion (130).

6. The return spring according to claim 2, characterized in that: Along the extension direction of the slideway, the bent portion (130) includes an initial end (131) and an end (132), and the return spring (100) is used to drive the brake block (300) to move in a direction close to the initial end (131); The first end of the return connection part (120) is connected to the initial end (131), the second end of the return connection part (120) extends along the extension direction of the slideway, and the second end of the return connection part (120) is partially bent to form a hook (122), and the hook (122) is used to hook and cooperate with the ear part (311); The unbent area at the second end of the return connection portion (120) forms an alarm structure, and the end of the alarm structure forms the alarm end (121).

7. The return spring according to claim 6, characterized in that: The side wall of the ear (311) is provided with an avoidance notch (3111); Along the extension direction of the slideway, the return connection portion (120) comprises an arc segment (123) and a straight segment (124), one end of the arc segment (123) is connected to the initial end (131) and forms the first end of the return connection portion (120), one end of the straight segment (124) is connected to the other end of the arc segment (123), and the other end of the straight segment (124) forms the second end of the return connection portion (120); The straight section (124) passes through the avoidance notch (3111) of the ear portion (311), and the arc section (123) and the hook (122) are respectively used to face two opposite surfaces of the ear portion (311).

8. A brake caliper, characterized in that: The invention comprises a return spring (100) as claimed in any one of claims 1 to 7, a caliper bracket (200), and a brake block (300) movably arranged on the caliper bracket (200), wherein: The caliper bracket (200) is provided with a clamping protrusion (210), the clamping portion (110) is clamped and connected to the clamping protrusion (210), the return connection portion (120) is connected to the brake block (300), and the return connection portion (120) can be deformed with the movement of the brake block (300) and is used to drive the brake block (300) to move in the first direction (a).

9. The brake caliper according to claim 8, characterized in that: The caliper bracket (200) comprises two opposite inner walls, each of the two opposite inner walls has the clamping protrusion (210), and each of the return springs (100) is clamped by the clamping protrusion (210); Two opposite ends of the brake block (300) are respectively connected to the return connection parts (120) of two opposite return springs (100) on the caliper bracket (200); The number of the brake blocks (300) is two, and the two brake blocks (300) are spaced apart and distributed along the moving direction of the brake blocks (300).

10. A brake, characterized in that: The invention comprises a brake caliper and a brake disc as claimed in any one of claims 8 to 9, wherein at least a portion of the brake disc is opposite to a braking surface of the brake block (300).

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