Caliper assembly for reducing dragging torque and vehicle

Abstract

The utility model provides a caliper assembly for reducing dragging torque and an automobile, the caliper assembly for reducing dragging torque comprises a shell assembly, a movable space is arranged in the shell assembly, a mounting cavity is arranged on the shell assembly, and a piston is arranged in the mounting cavity in a sliding mode; the two friction plate assemblies are arranged in the movable space in a sliding mode and correspond to the brake faces on the two sides of the brake disc correspondingly, and one side of each friction plate assembly corresponds to the piston; one end of the return assembly is connected with the friction plate assembly, and the other end of the return assembly is connected with the shell assembly, so that the friction plate assembly is elastically pulled in the sliding direction of the friction plate assembly. According to the return spring designed by the utility model, through the axial force provided by the return spring, the friction plate is effectively separated from the brake disc when a vehicle is not braked, and the action position of the return spring can ensure that the friction plate is separated from the brake disc as parallel as possible, so that the abrasion nonuniformity of the friction plate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile calipers, in particular to a caliper assembly and a vehicle for reducing drag torque. Background Art

[0002] As technology continues to advance, the fuel economy of automobiles is becoming more and more important. At the brake caliper end, it is usually necessary to reduce the resistance of the caliper to the brake disc during non-braking driving. This resistance is called drag torque.

[0003] In order to ensure the timely response of the brake caliper, the gap between the friction pad and the brake disc is usually designed to be very small, generally less than 0.3mm. This results in the friction pad often not being able to separate from the brake disc quickly and effectively, which in turn generates a drag torque and reduces the vehicle's endurance. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of the present utility model is to provide a caliper assembly and a vehicle with reduced drag torque, so as to solve the problem in the prior art that when the vehicle is not braking, the friction plate often cannot be effectively separated from the brake disc, thereby generating a drag torque and reducing the vehicle's endurance.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a caliper assembly for reducing drag torque, including: a shell assembly, a movable space is provided in the shell assembly, a mounting chamber is provided on the shell assembly, and a piston is slidably provided in the mounting chamber; a friction plate assembly, two friction plate assemblies are slidably arranged in the movable space and correspond to the braking surfaces on both sides of the brake disc respectively, and one side of the friction plate assembly is arranged corresponding to the piston; and a return assembly, one end of the return assembly is connected to the friction plate assembly, and the other end of the return assembly is connected to the shell assembly, so as to elastically pull the friction plate assembly along the sliding direction of the friction plate assembly.

[0006] In one embodiment of the present invention, the shell assembly includes: a shell body, in which the movable space is correspondingly arranged; and a guide rod, which is installed on the shell body and slides through the friction plate assembly along the thickness direction of the friction plate assembly.

[0007] In one embodiment of the utility model, the friction plate assembly includes: a back plate, which is slidably inserted on the guide rod; and a friction plate, which is arranged on the first side of the back plate and is arranged corresponding to the braking surface of the brake disc.

[0008] In one embodiment of the utility model, the return assembly includes: a return spring, a first end of which is connected to a back plate, and the return spring is arranged close to the central axis of the piston; and a mounting pin, which is mounted on the shell body, and a second end of the return spring is detachably connected to the mounting pin.

[0009] In one embodiment of the present invention, the shell body is provided with a first mounting groove arranged along the length direction of the return spring and a second mounting groove corresponding to the mounting pin, and the second mounting groove is communicated with the first mounting groove.

[0010] In one embodiment of the utility model, the first mounting slot and the second mounting slot are arranged perpendicular to each other, the mounting pin is installed in the second mounting slot, and one end of the mounting pin corresponding to the first mounting slot is hooked and connected to the second end of the return spring.

[0011] In one embodiment of the utility model, the return spring includes: a spring body; a hook, which is arranged at the first end of the spring body to be hooked on the back plate; and a hanging ring, which is arranged at the second end of the spring body to be sleeved on the mounting pin.

[0012] In one embodiment of the utility model, a boss is extended from the back plate along its thickness direction in a direction away from the friction plate, and a hanging hole is provided along the radial direction of the boss. The hook passes through the hanging hole to be hooked on the boss.

[0013] In one embodiment of the present invention, the caliper assembly further includes: a compression spring mounted on the housing assembly to elastically apply pressure to the friction plate assembly in a direction perpendicular to the sliding direction of the friction plate assembly.

[0014] The utility model also provides a vehicle, comprising the aforementioned caliper assembly for reducing drag torque.

[0015] Beneficial effects of the utility model: The utility model proposes a caliper assembly and a vehicle for reducing the drag torque. The caliper assembly and the vehicle provide the friction plate assembly with a force away from the brake disc in the axial direction of the brake disc when the piston returns through the mutual cooperation between the piston, the return assembly and the friction plate assembly in the housing assembly. And it can effectively separate the friction plate from the brake disc in parallel, reduce the drag effect, and improve the uniformity of the friction plate wear. Moreover, the first installation groove and the second installation groove are formed by punching on the shell body to realize the assembly of the return spring and the installation pin in the shell body, which not only does not affect the appearance of the product, but also solves the problem of small space and difficult arrangement of the return spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the caliper assembly of the utility model.

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the structure on the bottom side of the middle caliper assembly.

[0018] Figure 3 For this utility model Figure 1 Section view along AA.

[0019] Figure 4 For this utility model Figure 2 Cross-sectional view along BB.

[0020] Figure 5 For this utility model Figure 1 Schematic diagram of the structure after the middle shell assembly is cut open.

[0021] Figure 6 This is a structural layout diagram of the friction plate assembly and the return assembly of the utility model.

[0022] Component number description

[0023] Shell assembly 1; friction plate assembly 2; return assembly 3; compression spring 4; activity space 11; installation chamber 12; piston 13; shell body 14; guide rod 15; back plate 21; friction plate 22; silencer 23; first installation groove 111; second installation groove 112; boss 211; hanging hole 212; first guide hole 213; second guide hole 231; return spring 31; installation pin 32; spring body 311; hook 312; hanging ring 313; compression spring body 41; first pressure end 42; second pressure end 43. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0026] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0027] See also Figure 1-4The utility model provides a caliper assembly for reducing drag torque, comprising: a housing assembly 1, wherein an activity space 11 is provided in the housing assembly 1, an installation chamber 12 is provided on the housing assembly 1, and a piston 13 is slidably provided in the installation chamber 12; a friction plate assembly 2, wherein two friction plate assemblies 2 are slidably provided in the activity space 11 and correspond to the braking surfaces on both sides of the brake disc respectively, and one side of the friction plate assembly 2 is arranged corresponding to the piston 13; and a return assembly 3, wherein one end of the return assembly 3 is connected to the friction plate assembly 2, and the other end of the return assembly 3 is connected to the housing assembly 1, so as to elastically pull the friction plate assembly 2 along the sliding direction of the friction plate assembly 2.

[0028] It is not difficult to find from the above content that when the friction plate assembly 2 is used to clamp the braking surfaces on both sides of the brake disc, the hydraulic thrust acts on the installation chamber 12 on the housing assembly 1 by stepping on the brake pedal. Further, the hydraulic thrust pushes the piston 13 in the installation chamber 12, so that the friction plate assembly 2 in the activity space 11 moves toward the braking surfaces on both sides of the brake disc, and enables the friction plate assembly 2 to clamp the brake disc, thereby generating a braking force to prevent the brake disc from rotating. At this time, due to the action of the hydraulic pressure, the piston 13 is pushed out of the installation chamber 12, so that the end of the piston 13 extends to the activity space 11 and acts on the friction plate assembly 2, so that the friction plate assembly 2 is pushed away from the inner wall of the activity space 11, so that the return assembly 3 connected to the friction plate assembly 2 at one end and connected to the housing assembly 1 at the other end is in an elastic load state. Therefore, the hydraulic pressure also needs to overcome the elastic force of the return assembly 3. Then, when the brake pedal is released, the hydraulic pressure on the piston 13 in the installation chamber 12 disappears, and the piston 13 and the sealing ring mounted on the piston 13 are pulled back. At this time, the return spring 3, one end of which is connected to the housing assembly 1, acts through the elastic force of its elastic load state, and elastically pulls the friction plate assembly 2 toward the braking surface away from the two sides of the brake disc to achieve separation from the brake disc, thereby reducing the drag torque.

[0029] like Figure 5 As shown, the housing assembly 1 includes: a shell body 14, in which the movable space 11 is correspondingly arranged; and a guide rod 15, which is installed on the shell body 14 and slides through the friction plate assembly 2 along the thickness direction of the friction plate assembly 2.

[0030] In one embodiment of the utility model, the housing assembly 1 includes a housing body 14 and a guide rod 15 in terms of structural design. The guide rod 15 is mounted on the housing body 14 and is partially located in the activity space 11 to guide the friction plate assembly 2 along the sliding direction. Specifically, the guide rod 15 can be a pin rod structure, that is, by opening a pin hole corresponding to the guide rod 15 on the housing body 14, and the pin holes are correspondingly arranged on both sides of the activity space 11, so that the guide rod 15 passes through each pin hole in sequence to be positioned and installed on the housing body 14.

[0031] like Figure 6 As shown, the friction plate assembly 2 includes: a back plate 21, which is slidably inserted on the guide rod 15; and a friction plate 22, which is arranged on a first side of the back plate 21, and the friction plate 22 is arranged corresponding to the braking surface of the brake disc. Further, the friction plate assembly 2 also includes a silencer 23, which is arranged on a second side of the back plate 21, and the silencer 23 is arranged corresponding to the inner wall of the activity space 11.

[0032] In one embodiment of the utility model, the friction plate assembly 2 includes a back plate 21, a friction plate 22 and a silencer 23. Specifically, the friction plate 22 is installed on the first side of the back plate 21, and the friction plate 22 is arranged on the side corresponding to the braking surface of the brake disc. Thus, when the back plate 21 slides along the guide rod 15 and moves toward the brake disc, the friction plate 22 on the back plate 21 contacts the braking surface of the brake disc, thereby braking the brake disc. By installing the silencer 23 on the second side of the back plate 21, the noise interference caused by the back plate 21 hitting the inner wall of the activity space 11 when it is pulled away from the brake disc by the return assembly 3 can be reduced.

[0033] Specifically, the silencer 23 is located on the second side of the back plate 21, and the two ends of the silencer 23 are wrapped around the two end surfaces of the back plate 21 along the vertical direction of the sliding of the friction plate assembly 2. A first guide hole 213 is provided on the back plate 21 for the guide rod 15 to slide back and forth, and a second guide hole 231 corresponding to the first guide hole 213 is also provided on the silencer 23. In addition, the radial dimensions of the first guide hole 213 and the second guide hole 231 are greater than the radial dimensions of the guide rod 15.

[0034] Furthermore, the return assembly 3 includes: a return spring 31, a first end of the return spring 31 is connected to the back plate 21, and the return spring 31 is arranged close to the central axis of the piston 13; and a mounting pin 32, the mounting pin 32 is mounted on the shell body 14, and the second end of the return spring 31 is detachably connected to the mounting pin 32.

[0035] In one embodiment of the utility model, when installing the return spring 31 in the return assembly 3, the installation pin 32 is threadedly installed on the shell body 14, and the installation pin 32 is detachably connected to the second end of the return spring 31. The shell body 14 and the return spring 31 can be disassembled by disassembling the installation pin 32, thereby facilitating the disassembly and installation of the return spring 31 and the return assembly 3 on the shell body 14.

[0036] Furthermore, at least two return assemblies 3 are respectively arranged on both sides of the piston 13 along the tangent direction of the brake disc, close to the central axis of the piston 13 and away from the pressure position of the compression spring 4. In other words, the return assembly 3 is close to the edge of the piston 13 and the edge of the corresponding activity space 11, so that the friction plate 22 can be effectively separated from the brake disc along the axial direction of the brake disc, that is, the surface of the friction plate 22 can be kept parallel to the braking surface of the corresponding brake disc when separated from the brake disc. Thereby reducing the drag effect, the wear uniformity of the friction plate 22 is improved.

[0037] See also Figure 1 , 2 In a preferred embodiment given in Figures 5 and 6, in the caliper assembly of the utility model, the housing assembly 1 can be formed by assembling two symmetrical shell bodies 14 together. Of course, the housing assembly 1 can also be an integrated structure, that is, the shell body 14 is formed by integral casting. Specifically, in an embodiment of the housing assembly 1 obtained by assembling two shell bodies 14, the activity space 11 is respectively arranged in each shell body 14, and the activity space 11 is formed after the shell bodies 14 are assembled together. The installation chamber 12 is arranged on the housing assembly 1, and can be arranged on the inner wall of the housing assembly 1 corresponding to the activity space 11. Of course, the installation chamber 12 can also be arranged at other positions of the housing assembly 1, so that the piston 13 can push the friction plate assembly 2 back and forth. The installation chamber 12 can be respectively arranged on the housing assembly 14 on both sides of the brake disc, so that the piston 13 can simultaneously push the two friction plate assemblies 2 on both sides of the brake disc to approach and contact the surface of the brake disc to achieve the purpose of braking. When the friction plate assembly 2 leaves the brake disc, the return assembly 3 pulls the friction plate assemblies 2 connected to each other away from the two sides of the brake disc. Of course, the installation chamber 12 can also be arranged only on one side of the brake disc. That is, the piston 13 first pushes the friction plate assembly 2 on the corresponding side to contact the brake disc, and then the housing assembly 1 moves as a whole in the opposite direction of the movement of the piston 13, so that the friction plate assembly 2 installed on the housing assembly 1 on the other side of the brake disc contacts the other side of the brake disc, so that the two friction plate assemblies 2 clamp the brake disc and brake both sides. When the friction plate assembly 2 leaves the brake disc, the return assembly 3 pulls the friction plate assembly 2 on the side corresponding to the installation chamber 12 and the piston 13 away from one side of the brake disc, and the housing assembly 1 moves in the opposite direction of the movement of the piston, so that the friction plate assembly 2 on the other side directly connected to the housing assembly 1 leaves the brake disc.

[0038] In some embodiments, Figure 3 and 4As shown, the housing assembly 1 is provided with two pairs of mounting chambers 12, the two pairs of mounting chambers 12 are arranged symmetrically about the activity space 11, and two pairs of piston groups are correspondingly arranged in the two pairs of mounting chambers 12, each pair of mounting chambers 12 includes two mounting chambers 12, and each mounting chamber 12 is correspondingly provided with a piston 13, and the two mounting chambers 12 in each pair of mounting chambers 12 are arranged at intervals along the tangential direction of the brake disc. Two friction plate assemblies 2 are arranged corresponding to a pair of piston groups, respectively, and each friction plate assembly 2 is connected to two return assemblies 3, and the two return assemblies 3 are arranged at intervals along the tangential direction of the brake disc and close to the central axis of the piston 13.

[0039] like Figure 4 As shown, the shell body 14 is provided with a first mounting groove 111 arranged along the length direction of the return spring 31 and a second mounting groove 112 corresponding to the mounting pin 32 , and the second mounting groove 112 is connected to the first mounting groove 111 .

[0040] In an embodiment of the utility model, during the installation of the return spring 31, the first end of the return spring 31 is installed on the back plate 21, and the second end of the return spring 31 passes through the first installation slot 111 and is connected to the installation pin 32. Thus, when the return spring 31 pulls the back plate 21, the return spring 31 is received in the first installation slot 111, so that the muffler 23 can abut against the inner wall of the activity space 11. Specifically, the second installation slot 112 is arranged on the side of the shell body 14 away from the activity space 11.

[0041] Specifically, the first mounting groove 111 and the second mounting groove 112 are arranged perpendicular to each other, the mounting pin 32 is installed in the second mounting groove 112, and one end of the mounting pin 32 corresponding to the first mounting groove 111 is hooked and connected to the second end of the return spring 31.

[0042] In one embodiment of the utility model, the mounting pin 32 can be a screw pin. When the mounting pin 32 is threadedly installed in the second mounting groove 112, the mounting pin 32 will pass through the first mounting groove 111 which is connected to the second mounting groove 112. At the same time, the second end of the return spring 31 placed in the first mounting groove 111 will be hooked with the mounting pin 32, so as to realize the installation of the return spring 31 in the first mounting groove 111. Specifically, the second mounting groove 112 is a groove body with a thread opened along the radial direction of the brake disc, so that the mounting pin 32 can be installed on the shell body 14. The first mounting groove 111 is a groove body opened along the axial direction of the brake disc, so as to accommodate the return spring 311. Please refer to Figure 5 and 6 , where the x direction is the axial direction of the brake disc, the y direction is the tangential direction of the brake disc, and the z direction is the radial direction of the brake disc.

[0043] The utility model obtains a first installation groove 111 and a second installation groove 112 by drilling holes on the shell body 14, and installs the return spring 31 in the first installation groove 111 and the installation pin 32 in the second installation groove 112. The return spring 31 and the installation pin 32 are assembled into the shell body 14 without affecting the appearance of the product, and the problem of small space and difficult arrangement of the return spring 31 is solved.

[0044] Preferably, the return spring 31 includes: a spring body 311; a hook 312, which is arranged at a first end of the spring body 311 to be hooked on the back plate 21; and a hanging ring 313, which is arranged at a second end of the spring body 311 to be sleeved on the mounting pin 32.

[0045] In one embodiment of the utility model, one end of the spring body 311 of the return spring 31 is a hook 312, and the other end is a hanging ring 313. Specifically, the spring body 311, the hook 312 and the hanging ring 313 are an integrated structure. The hook 312 at the first end of the spring body 311 is hooked on the back plate 21, and the hanging ring 313 at the second end of the spring body 311 is sleeved on the corresponding mounting pin 32 located in the first mounting groove 111. Therefore, it is convenient to detachably mount the spring body 311 in the first mounting groove 111 by using the mounting pin 32 to pass through the hanging ring 313.

[0046] Specifically, a boss 211 extends from the back plate 21 along the thickness direction thereof in a direction away from the friction plate 22, and a hanging hole 212 is provided along the radial direction of the boss 211, and the hook 312 passes through the hanging hole 212 to be hooked on the boss 211. In this embodiment, the boss 211 on the back plate 21 can be stamped. In addition, in order to hook the hook 312, a hanging hole 212 is provided on the boss 211 along the radial direction, so that the hook 312 passes through the hanging hole 212 to complete the hooking, and a return force is applied to the friction plate 22 on one side of the back plate 21.

[0047] The caliper assembly further includes a compression spring 4 , which is mounted on the housing assembly 1 to elastically apply pressure to the friction plate assembly 2 in a direction perpendicular to the sliding direction of the friction plate assembly 2 .

[0048] In one embodiment of the utility model, when the friction plate assembly 2 slides back and forth in the activity space 11, the compression spring 4 will elastically press on the friction plate assembly 2, thereby solving the problem that when the wheel is vibrated, the friction plate assembly 2 moves in a direction perpendicular to its sliding direction and produces abnormal noise.

[0049] like Figure 5As shown, the compression spring 4 includes: a compression spring body 41; a first pressure end 42, two first pressure ends 42 are respectively connected to the two sides of the compression spring body 41 along the tangential direction of the brake disc, and the two first pressure ends 42 are respectively hooked with two guide rods 15 arranged at intervals along the tangential direction of the brake disc; and a second pressure end 43, two groups of second pressure ends 43 are respectively connected to the two sides of the compression spring body 41 along the tangential direction of the brake disc, and the second pressure ends 43 are pressed on the friction plate assembly 2, and each group of second pressure ends 43 includes two second pressure ends 43 and are arranged at intervals along the sliding direction of the friction plate assembly 2.

[0050] In one embodiment of the utility model, when the compression spring 4 applies pressure to the friction plate assembly 2 slidably disposed on the guide rod 15, the first pressure-applying ends 42 on both sides of the compression spring body 41 are hooked on the guide rod 15, and the second pressure-applying ends 43 on both sides of the compression spring body 41 are pressed against the friction plate assembly 2. Thus, when the friction plate assembly 2 slides back and forth along the guide rod 15, the friction plate assembly 2 can be prevented from moving.

[0051] The utility model also provides a car, comprising the above-mentioned caliper assembly for reducing drag torque.

[0052] In summary, the present invention can press the friction plate assembly 2 by the compression spring 4, the return spring 3 and the friction plate assembly 2 slidably mounted on the housing assembly 1, so as to prevent the friction plate assembly 2 from moving when sliding. At the same time, the return spring 3 connected to the housing assembly 1 elastically pulls the friction plate assembly 2 along the axial direction of the brake disc, so that when the brake pedal is released and the piston 13 returns, the return spring 3 provides the friction plate assembly 2 with an axial force away from the brake disc, thereby reducing the drag torque. Specifically, the return spring 3 is arranged at a position close to the central axis of the piston 13 and away from the compression spring 4, which can effectively make the friction plate assembly 2 parallel to the braking surface of the brake disc, reduce the drag effect, and improve the wear uniformity of the friction plate 22. By punching the first mounting groove 111 and the second mounting groove 112 on the shell body 14, the return spring 31 and the mounting pin 32 can be assembled in the shell body 14 without affecting the appearance of the product, while solving the problem of small space and difficult arrangement of the return spring 31, and facilitating the installation and removal of the return spring 31. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A caliper assembly for reducing drag torque, characterized in that: include: A housing assembly (1), wherein a movable space (11) is provided in the housing assembly (1), an installation chamber (12) is provided on the housing assembly (1), and a piston (13) is slidably provided in the installation chamber (12); A friction plate assembly (2), wherein two friction plate assemblies (2) are slidably disposed in the movable space (11) and correspond to the braking surfaces on both sides of the brake disc respectively, and one side of the friction plate assembly (2) is arranged corresponding to the piston (13); and A return assembly (3), one end of the return assembly (3) is connected to the friction plate assembly (2), and the other end of the return assembly (3) is connected to the housing assembly (1) so as to elastically pull the friction plate assembly (2) along the sliding direction of the friction plate assembly (2).

2. The caliper assembly for reducing drag torque according to claim 1, characterized in that: The housing assembly (1) comprises: A shell body (14), wherein the activity space (11) is correspondingly arranged in the shell body (14); and A guide rod (15), wherein the guide rod (15) is mounted on the shell body (14), and the guide rod (15) slides through the friction plate assembly (2) along the thickness direction of the friction plate assembly (2).

3. The caliper assembly for reducing drag torque according to claim 2, characterized in that: The friction plate assembly (2) comprises: a back plate (21), the back plate (21) being slidably inserted on the guide rod (15); and A friction plate (22), wherein the friction plate (22) is arranged on a first side of the back plate (21), and the friction plate (22) is arranged corresponding to the braking surface of the brake disc.

4. The caliper assembly for reducing drag torque according to claim 3, characterized in that: The return assembly (3) comprises: a return spring (31), wherein a first end of the return spring (31) is connected to the back plate (21), and the return spring (31) is arranged close to the central axis of the piston (13); and A mounting pin (32) is mounted on the shell body (14), and the second end of the return spring (31) is detachably connected to the mounting pin (32).

5. The caliper assembly for reducing drag torque according to claim 4, characterized in that: The shell body (14) is provided with a first mounting groove (111) arranged along the length direction of the return spring (31) and a second mounting groove (112) corresponding to the mounting pin (32), and the second mounting groove (112) is communicated with the first mounting groove (111).

6. The caliper assembly for reducing drag torque according to claim 5, characterized in that: The first mounting groove (111) and the second mounting groove (112) are arranged perpendicular to each other, the mounting pin (32) is installed in the second mounting groove (112), and one end of the mounting pin (32) corresponding to the first mounting groove (111) is hooked and connected to the second end of the return spring (31).

7. The caliper assembly for reducing drag torque according to claim 4, characterized in that: The return spring (31) comprises: Spring body (311); a hook (312), the hook (312) being disposed at the first end of the spring body (311) so as to be hooked on the back plate (21); and A hanging ring (313) is provided at the second end of the spring body (311) so as to be sleeved on the mounting pin (32).

8. The caliper assembly for reducing drag torque according to claim 7, characterized in that: A boss (211) extends from the back plate (21) along its thickness direction in a direction away from the friction plate (22), and a hanging hole (212) is provided on the boss (211) along its radial direction, and the hook (312) passes through the hanging hole (212) to be hooked on the boss (211).

9. The caliper assembly for reducing drag torque according to claim 2, characterized in that: The caliper assembly further comprises: a compression spring (4), which is mounted on the housing assembly (1) to elastically apply pressure to the friction plate assembly (2) in a direction perpendicular to the sliding direction of the friction plate assembly (2).

10. A vehicle, characterized in that: A caliper assembly for reducing drag torque comprising any one of claims 1-9.

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