An elastic reset device for reducing the drag torque of a floating disc brake

Abstract

The present invention relates to an elastic reset device for reducing the drag torque of a floating disc brake, comprising a brake caliper bracket and a brake caliper housing, wherein the brake caliper housing is arranged across the brake caliper bracket, the brake caliper bracket is slidably connected relative to the brake caliper housing, the brake caliper bracket is arranged across the brake disc, the brake caliper housing comprises a brake pad main pushing surface on which a piston is arranged and a brake pad secondary pushing surface corresponding to the brake pad main pushing surface, the brake caliper bracket and the brake caliper housing are slidably connected via a guide mechanism; the guide sliding mechanism comprises a sliding end and a stationary end slidably connected to each other; an elastic reset device is arranged between the sliding end and the stationary end; a gap adjustment device is also arranged between the sliding end and the stationary end, the gap adjustment device comprises an axial fixing portion and an axial adjustment portion, the axial fixing portion is fixed on the stationary end, and the axial adjustment portion is axially positioned and connected to the axial fixing portion.

Description

Technical Field

[0001] The invention relates to an elastic resetting device for reducing the drag torque of a floating disc brake, and belongs to the fields of automobiles, braking and energy saving. Background Art

[0002] As an important part of modern automobile braking technology, floating brake caliper disc brake is widely used due to its strong adaptability, easy installation and maintenance.

[0003] Due to the floating characteristics of the caliper body, when floating, the brake pads on the brake caliper bracket are separated from the brake disc by the bouncing and supporting of the brake disc surface after the brake pressure is released. During the separation process, the separation of the outer brake pads on the other side of the brake disc opposite to the brake piston is hindered by the brake caliper housing, and the movement of the brake caliper housing is affected by the friction force, so that the brake pads cannot be separated from the brake disc quickly, resulting in a small amount of brake drag caused by friction between the brake pads and the brake disc after the brake pressure is released.

[0004] In the existing technical solutions for reducing brake drag force, the design of the sealing ring guide groove between the brake piston and the brake caliper body can quickly reset the brake piston when the brake pressure is released, thereby reducing the obstruction of the brake piston to the separation of the inner brake pad on the side of the brake disc adjacent to the brake piston. However, it cannot solve the problem of incomplete separation of the outer brake pad due to the floating of the brake caliper body being affected by the friction resistance of the mechanism, and it is difficult to quickly reduce the brake drag force after the brake pressure is released.

[0005] In the existing technical solutions for reducing brake drag, an elastic reset element is added between the inner and outer brake pads, so that the increase process of the sum of the gaps between the inner and outer brake pads and the brake disc can be accelerated when the brake pressure is released. However, due to the floating of the caliper body, the problem of incomplete separation of the brake pad on one side from the brake disc caused by the floating of the caliper body cannot be solved well, and it is difficult to quickly reduce the brake drag after the brake is released. Summary of the invention

[0006] The technical solution adopted by the present invention to solve its technical problem is: An elastic reset device for reducing the drag torque of a floating disc brake comprises a brake caliper bracket and a brake caliper housing, the brake caliper housing is arranged across the brake caliper bracket, the brake caliper bracket is slidably connected relative to the brake caliper housing, the brake caliper bracket is arranged across the brake disc, the brake caliper housing comprises a brake pad main push surface on which a piston is arranged and a brake pad secondary push surface corresponding to the brake pad main push surface, the brake pad main push surface and the brake pad secondary push surface are respectively used to contact the brake pads on both sides of the brake caliper bracket, and the brake caliper bracket and the brake caliper housing are slidably connected through a guide mechanism; The guide sliding mechanism comprises a sliding end and a stationary end which are slidably connected to each other; An elastic reset device is arranged between the sliding end and the stationary end, and the elastic reset device provides a thrust along the sliding direction through an elastic body arranged between the sliding end and the stationary end, and the thrust pushes the brake pad auxiliary pushing surface of the brake caliper housing away from the brake disc; A gap adjustment device for limiting the maximum gap between the secondary pushing surface and the brake disc is also provided between the sliding end and the stationary end. The gap adjustment device includes an axial fixing portion and an axial adjustment portion. The axial fixing portion is fixed to the stationary end, the axial adjustment portion is axially positioned and connected to the axial fixing portion, and the end of the axial adjustment portion is used for limiting contact with the sliding end.

[0007] As a further improvement of the present invention, the guide sliding mechanism comprises a guide pin shaft fixed to the sliding end and a guide pin sleeve fixed to the stationary end and slidably connected relative to the guide pin shaft; The sliding matching connection between the guide pin shaft and the guide pin sleeve improves the stability of the sliding connection.

[0008] As a further improvement of the present invention, a guide pin shaft extending toward the brake caliper bracket is fixed in the brake caliper housing, and a guide pin sleeve is arranged in the brake caliper bracket.

[0009] As a further improvement of the present invention, the axial fixing portion includes a connecting seat fixed to the end of the guide pin sleeve, and the axial adjustment portion includes a gap adjustment screw connected to the connecting seat by threads, and the end of the gap adjustment screw is used to contact the end of the guide pin shaft; By setting a split structure of a connecting seat at the end of the guide pin sleeve, the connection of the clearance adjustment screw is realized. Compared with directly connecting the adjustment screw inside the guide pin sleeve, the split structure can conveniently adjust the clearance; the clearance adjustment screw allows the adjustment to be arranged outside the brake caliper housing, which is convenient for later clearance adjustment or the installation of additional automatic adjustment mechanisms to adapt to different degrees of friction plate wear.

[0010] As a further improvement of the present invention, the elastic reset device includes a reset spring coaxially arranged relative to the guide pin shaft, a limit screw is provided at the end of the guide pin shaft, and both ends of the reset spring are in elastic contact with the limit end surface of the limit screw and the support end of the guide pin sleeve respectively; The threaded connection facilitates replacement of the return spring and adjustment of the preload force.

[0011] As a further improvement of the present invention, the connecting seat includes a connecting portion connected to the end of the guide pin sleeve, a limiting portion is fixed at one end of the connecting portion, and the gap adjustment screw is connected to the limiting portion through a thread; the connecting portion is coaxially arranged relative to the guide pin shaft; and the return spring is coaxially arranged between the connecting portion and the guide pin shaft; The connecting seat uses two parts, a connecting part and a limiting part. The limiting part is coaxially sleeved on one end of the guide pin sleeve through the connecting part, ensuring the uniformity of the pulling force generated by the guide pin shaft on the connecting seat when acting on the end of the guide pin sleeve during the limiting process of the guide pin shaft, thereby ensuring stability.

[0012] As a further improvement of the present invention, a connecting hole is provided at the axial end of the guide pin sleeve, and the end of the connecting portion is fixedly connected to the connecting hole by a thread; The threaded connection of the connecting hole facilitates the disassembly and installation of the connecting seat, and facilitates the later clearance adjustment or the installation of additional automatic adjustment mechanisms to adapt to different degrees of friction plate wear.

[0013] As a further improvement of the present invention, the guide pin sleeve and the brake caliper bracket are an integrated structure; The integrated structure simplifies the structure, making the radial support of the guide pin sleeve more stable; and can ensure that the axial deviation of the guide pin sleeve will not occur when the guide pin sleeve contacts the gap adjustment mechanism.

[0014] As a further improvement of the present invention, the guide sliding mechanism includes a guide pin shaft fixed to the stationary end and a guide pin sleeve fixed to the sliding end and slidably connected relative to the guide pin shaft.

[0015] As a further improvement of the present invention, a guide pin sleeve is provided through the brake caliper housing, and a guide pin shaft is fixedly provided on the outer side of the brake caliper bracket.

[0016] As a further improvement of the present invention, the axial fixing portion includes a connecting seat that penetrates and is connected to the brake caliper housing, a clearance adjustment screw sleeve is threadedly connected in the connecting seat, and an end of the clearance adjustment screw sleeve is in limited contact with an end of the guide pin shaft; the guide pin sleeve is coaxially fixed to the inner ring of the clearance adjustment screw sleeve and is fixed to the brake caliper housing through the clearance adjustment screw sleeve; The clearance adjustment screw sleeve allows the adjustment to be arranged externally to the brake housing, which is convenient for later adjustment or the installation of additional automatic adjustment mechanisms to adapt to different degrees of friction plate wear.

[0017] As a further improvement of the present invention, the elastic reset device includes a reset spring arranged coaxially relative to the guide pin shaft, and a limiting end is set at the end of the guide pin shaft. The two ends of the reset spring are respectively elastically in contact with the limiting end of the guide pin shaft and the supporting end of the guide pin sleeve.

[0018] As a further improvement of the present invention, the guide pin sleeve and the clearance adjustment screw sleeve are an integrated structure; The one-piece structure simplifies the structure and increases durability and stability.

[0019] As a further improvement of the present invention, a connecting stud is provided at the axial end of the guide pin shaft, and the end of the connecting stud is fixedly connected to the brake caliper bracket through a thread.

[0020] The beneficial effects of the present invention are: The present invention adds an elastic reset mechanism to the single-piston brake caliper to overcome the friction resistance between the guide pin sleeve and the guide pin shaft of the brake caliper housing after the brake pressure is released, and pushes the secondary push surface on the opposite side of the brake caliper piston to move away from the brake disc after the brake pressure is released, thereby significantly reducing the brake drag torque caused by incomplete separation of the secondary push surface.

[0021] The present invention additionally arranges a set of brake disc clearance limit adjustment devices on the elastic reset mechanism of the single-piston brake caliper, thereby ensuring the reasonable distribution of the brake disc clearances on both sides after reset by limiting the reset distance of the elastic reset mechanism, thereby preventing the additional drag torque generated by excessive pushing of the elastic reset mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 is a schematic structural diagram of Example 1; Figure 2 yes Figure 1 A partial enlarged view of the middle A; Figure 3 is a schematic structural diagram of Example 2; Figure 4 yes Figure 3 A partial enlarged view of point B in the middle; Figure 5 is a schematic structural diagram of Example 3; Figure 6 yes Figure 5 A partial enlarged view of point C in the middle; Figure 7 It is a structural schematic diagram of the prior art.

[0024] In the figure: 1. brake caliper housing; 2. piston; 3. brake pad main pushing surface; 4. brake pad secondary pushing surface; 5. brake pad; 6. brake caliper bracket; 7. brake pad inlay groove; 8. guide pin shaft; 9. guide pin sleeve; 10. return spring; 11. adjustment gasket; 12. limit screw; 13. clearance adjustment screw; 14. connecting seat; 15. connecting hole; 16. clearance adjustment screw sleeve; 17. support end; 18. connecting stud. DETAILED DESCRIPTION

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0026] This brake is specifically for single piston 2 brakes, such as Figure 7 The brake mainly includes a brake caliper bracket 6 fixedly mounted on the steering knuckle, a brake pad inlay groove 7 is arranged on the brake caliper bracket 6 to floatly connect the brake pad 5, a brake caliper housing 1 is straddled on the outer side of the brake caliper bracket 6, a guide pin shaft 8 is arranged inside the brake caliper housing 1, a guide pin hole is integrally arranged on the brake caliper bracket 6, the guide pin hole is slidably connected with the guide pin shaft 8 to realize the sliding of the brake caliper housing 1 relative to the brake caliper bracket 6, a piston 2 that mainly generates a driving force is arranged at one end of the brake caliper housing 1, and a driven end is arranged at the other end. During the extension process of the piston 2, the driven end is driven by the relative sliding of the brake caliper bracket 6 and the brake caliper housing 1, a brake pad main pushing surface 3 is arranged on the end surface of the piston 2, and a brake pad secondary pushing surface 4 is arranged on the end surface of the driven end, and the brake pad main pushing surface 3 and the brake pad secondary pushing surface 4 are symmetrically arranged at both ends of the brake caliper housing 1.

[0027] In the default state, the gaps between the brake pad main pushing surface 3 located at the end of the piston 2 and the brake pad secondary pushing surface 4 located at one end of the brake caliper housing 1 and the brake disc surface are at the maximum distance. At this time, the brake pad 5 is in a separated state from the brake disc surface, and the piston 2 is in a retracted state; the brake pad 5 slides slightly or floats relative to the brake caliper bracket 6 through the brake pad inlay groove 7 set on the brake caliper bracket 6.

[0028] During braking, the piston 2 is first pushed out by the driving force of the brake fluid pressure, so that the main push surface 3 of the brake pad moves toward the surface of the brake disc, and the main push surface 3 of the brake pad pushes the inner brake pad 5 toward the surface of the brake disc and contacts the inner surface of the brake disc first, and then the piston 2 continues to float, and then pushes the brake caliper housing 1 in reverse, so that the brake caliper housing 1 as a whole moves in the opposite direction of the piston 2 pushing out direction, and during the movement of the brake caliper housing 1, the secondary push surface 4 of the brake pad pushes the outer brake pad 5, so that the outer brake pad 5 moves toward the surface of the brake disc and contacts the surface of the brake disc to achieve braking; In the separation process after the braking is completed, the piston 2 retracts, so that the brake pad main push surface 3 and the brake pad 5 are separated, and then the brake pads 5 on both sides of the brake disc are separated relative to the brake disc due to the swing tolerance when the brake disc rotates. During the separation process, the driving force of the brake disc on the brake pad 5 will push the brake pad main push surface 3 and the brake pad secondary push surface 4 to return the brake caliper housing 1 to its original position; Since there is friction between the guide pins between the brake caliper housing 1 and the brake caliper bracket 6, the brake caliper housing 1 will bring certain restrictions to the separation of the brake pad 5, thereby generating a certain brake drag torque. A guide mechanism consisting of a guide pin shaft 8 and a guide pin sleeve 9 is arranged between the brake caliper housing 1 and the brake caliper bracket 6, and a return spring 10 is placed on the guide mechanism. The return spring 10 pushes the brake caliper housing 1 to move relative to the brake caliper bracket 6 first, so that the contact part between the brake caliper housing 1 and the outer brake pad 5 is separated, so that the outer brake pad 5 can be quickly separated from the brake disc surface, thereby reducing the generation of brake drag torque.

[0029] Example 1 In this solution, in order to prevent the over-stretching of the return spring 10, the value of the outer clearance B of the brake disc is too large, and the value of the inner clearance A of the brake disc is compressed, resulting in the inner clearance A being too small, which in turn leads to the secondary generation of the drag torque; like Figure 1 and Figure 2 , the guide pin shaft 8 is fixedly connected to the brake caliper housing 1 through a connecting bolt. The guide pin shaft 8 is slidably connected to the brake caliper bracket 6 through a guide pin sleeve 9 integrally arranged in the brake caliper bracket 6; the limit screw 12 is fixedly connected to the guide pin shaft 8 through the screw hole at the end of the guide pin shaft 8; a reset spring 10 and an adjustment gasket 11 are provided between the limit screw 12 and the brake caliper bracket 6, and the adjustment gasket 11 is mainly used to adjust the preload value of the reset spring 10; the connecting seat 14 is threadedly connected to the brake caliper bracket 6 through the connecting hole 15; the clearance adjustment screw 13 is threadedly connected to the connecting seat 14, and the end of the clearance adjustment screw 13 contacts the limit screw 12.

[0030] During the initial installation process, the limit screw 12 compresses the return spring 10 by adjusting the gasket 11; after compressing the return spring 10, under the action of the reverse thrust of the return spring 10, the guide pin shaft 8 drives the brake caliper housing 1 to move toward the outside of the brake disc, until the inner side of the brake disc is completely in contact with the brake pad 5, at which time the outer clearance B of the brake disc is the sum of the ideal inner clearance A of the brake disc and the outer clearance B of the brake disc; by adjusting the clearance adjustment screw 13, the limit screw 12 is pushed out toward the inside of the brake disc, until the limit screw 12 drives the guide pin shaft 8 and the brake caliper housing 1 to move, until the outer clearance B of the brake disc reaches the design value; synchronously, the inner clearance A of the brake disc gradually increases to the design value.

[0031] When the brake pedal is depressed, as the brake fluid pressure in the piston 2 increases, the piston 2 pushes out toward the brake disc until the brake pad 5 is pressed against the inner surface of the brake disc; as the brake fluid pressure further increases, the brake caliper housing 1 moves under the reverse thrust of the piston 2, while driving the guide pin shaft 8 and the limit screw 12 to move and compress the return spring 10, and the brake caliper gradually presses the outer brake pad 5 against the outer surface of the brake disc until it is fully pressed, completing the braking.

[0032] After releasing the brake pedal, the brake pressure disappears. Under the action of the return spring 10, the limit screw 12 drives the guide pin shaft 8 and the brake caliper housing 1 to move until the limit screw 12 contacts the clearance adjustment screw 13, and the clearance B on the outside of the brake disc returns to its initial state before braking.

[0033] Example 2 like Figure 3 and Figure 4 Compared with the embodiment, the structure is further simplified, and the gap adjustment screw 13 is eliminated; the connecting seat 14 is connected to the brake caliper bracket 6 through the threaded connecting hole 15, and the inner bottom surface contacts the end of the guide pin shaft 8. The connecting seat 14 presses the guide pin shaft 8, and the gap adjustment is completed by screwing in or out the thread between it and the brake caliper bracket 6 to push the guide pin shaft 8.

[0034] This solution simplifies the structure and improves the sealing condition of the connection seat cavity.

[0035] Example 3 like Figure 5 and Figure 6On the basis of the alternative scheme, a clearance adjustment screw sleeve 16 is used to replace the clearance adjustment nut; the clearance adjustment screw sleeve 16 is axially hollow and fixed integrally with the guide pin sleeve 9, the clearance adjustment screw sleeve 16 is threadedly connected to a connecting seat 14 integrally arranged on the inner wall of the brake caliper housing 1, and the guide pin shaft 8 is fixed to the brake caliper bracket 6 through a connecting stud 18, so that the local area of ​​the brake caliper bracket 6 and the guide pin shaft 8 are relatively stationary, one end of the clearance adjustment screw sleeve 16 contacts the connection portion between the brake caliper bracket 6 and the guide pin shaft 8, and the other end contacts the reset spring 10; the reset spring 10 is sleeved on the guide pin shaft 8, and the two ends of the reset spring 10 are respectively in contact with the limiting end at the end of the guide pin shaft 8 and the supporting end 17 of the clearance adjustment screw sleeve 16.

[0036] During the initial installation process, the guide pin shaft 8 presses the return spring 10; under the action of the return spring 10, the clearance adjustment screw sleeve 16 is pushed and then drives the brake caliper housing 1 to move toward the outside of the brake disc until the end of the clearance adjustment screw sleeve 16 contacts the brake caliper bracket 6; by adjusting the clearance adjustment screw sleeve 16, the relative position of the brake caliper housing 1 and the brake caliper bracket 6 along the axial direction of the guide pin shaft 8 is adjusted until the clearance adjustment screw sleeve 16 drives the brake caliper housing 1 to move to the outside of the brake disc The clearance B is the design value; synchronously, the inner clearance A of the brake disc gradually increases to the design value.

[0037] When the brake pedal is depressed, as the brake fluid pressure in the piston 2 increases, the piston 2 pushes out toward the brake disc until the brake pad 5 is pressed against the inner surface of the brake disc; as the brake fluid pressure further increases, the brake caliper housing 1 moves under the reverse thrust of the piston 2, and at the same time drives the clearance adjustment screw sleeve 16 and the brake caliper housing 1 to move and compress the return spring 10, and the brake caliper housing 1 gradually presses the outer brake pad 5 against the outer surface of the brake disc until it is fully pressed, completing the braking.

[0038] After releasing the brake pedal, the brake pressure disappears, and under the action of the return spring 10, the clearance adjustment screw sleeve 16 drives the brake caliper housing 1 to move until the clearance adjustment screw sleeve 16 contacts the brake caliper bracket 6, and the clearance outside the brake disc returns to the initial state before braking.

[0039] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An elastic reset device for reducing the drag torque of a floating disc brake, comprising a brake caliper bracket and a brake caliper housing, the brake caliper housing is arranged across the brake caliper bracket, the brake caliper bracket is slidably connected relative to the brake caliper housing, the brake caliper bracket is arranged across the brake disc, the brake caliper housing comprises a brake pad main push surface on which a piston is arranged and a brake pad secondary push surface corresponding to the brake pad main push surface, the brake pad main push surface and the brake pad secondary push surface are respectively used to contact the brake pads on both sides of the brake caliper bracket, and the brake caliper bracket and the brake caliper housing are slidably connected through a guide mechanism; its characteristics are: The guide sliding mechanism comprises a sliding end and a stationary end which are slidably connected to each other; An elastic reset device is arranged between the sliding end and the stationary end, and the elastic reset device provides a thrust along the sliding direction through an elastic body arranged between the sliding end and the stationary end, and the thrust pushes the brake pad auxiliary pushing surface of the brake caliper housing away from the brake disc; A gap adjustment device for limiting the maximum gap between the secondary pushing surface and the brake disc is also provided between the sliding end and the stationary end. The gap adjustment device includes an axial fixing portion and an axial adjustment portion. The axial fixing portion is fixed to the stationary end, the axial adjustment portion is axially positioned and connected to the axial fixing portion, and the end of the axial adjustment portion is used for limiting contact with the sliding end.

2. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 1, characterized in that: The guide sliding mechanism comprises a guide pin shaft fixed to a sliding end and a guide pin sleeve fixed to a stationary end and slidably connected relative to the guide pin shaft.

3. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 2, characterized in that: A guide pin shaft extending toward the brake caliper bracket is fixed in the brake caliper housing, and a guide pin sleeve is arranged in the brake caliper bracket.

4. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 3, characterized in that: The axial fixing portion comprises a connecting seat fixed to the end of the guide pin sleeve, and the axial adjusting portion comprises a gap adjusting screw threadedly connected to the connecting seat, and the end of the gap adjusting screw is used to contact the end of the guide pin shaft.

5. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 4, characterized in that: The elastic reset device includes a reset spring coaxially arranged relative to the guide pin shaft, a limit screw is arranged at the end of the guide pin shaft, and the two ends of the reset spring are respectively in elastic contact with the limit end surface of the limit screw and the supporting end of the guide pin sleeve.

6. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 5, characterized in that: The connecting seat includes a connecting part connected to the end of the guide pin sleeve, a limiting part is fixed at one end of the connecting part, and the gap adjustment screw is connected to the limiting part through a thread; the connecting part is coaxially arranged relative to the guide pin shaft; and the reset spring is coaxially arranged between the connecting part and the guide pin shaft.

7. An elastic reset device for reducing the drag torque of a floating disc brake according to claim 6, characterized in that: A connecting hole is arranged at the axial end of the guide pin sleeve, and the end of the connecting part is fixedly connected to the connecting hole through a thread.

8. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 6, characterized in that: The guide pin sleeve and the brake caliper bracket are an integrated structure.

9. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 1, characterized in that: The guide sliding mechanism comprises a guide pin shaft fixed at a stationary end and a guide pin sleeve fixed at a sliding end and slidably connected relative to the guide pin shaft.

10. An elastic reset device for reducing the drag torque of a floating disc brake according to claim 9, characterized in that: A guide pin sleeve is provided through the brake caliper housing, and a guide pin shaft is fixedly provided on the outer side of the brake caliper bracket.

11. An elastic reset device for reducing the drag torque of a floating disc brake according to claim 10, characterized in that: The axial fixing portion includes a connecting seat that is connected to the brake caliper housing through a threaded connection, and a clearance adjustment screw sleeve is threadedly connected in the connecting seat, and the end of the clearance adjustment screw sleeve is in limited contact with the end of the guide pin shaft; the guide pin sleeve is coaxially fixed to the inner ring of the clearance adjustment screw sleeve and is fixed to the brake caliper housing through the clearance adjustment screw sleeve.

12. An elastic reset device for reducing the drag torque of a floating disc brake according to claim 11, characterized in that: The elastic reset device includes a reset spring coaxially arranged relative to the guide pin shaft, a limit end is provided at the end of the guide pin shaft, and both ends of the reset spring are elastically in contact with the limit end of the guide pin shaft and the support end of the guide pin sleeve respectively.

13. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 11, characterized in that: The guide pin sleeve and the clearance adjustment screw sleeve are an integrated structure.

14. The elastic reset device for reducing the drag torque of a floating disc brake according to claim 9, characterized in that: A connecting stud is arranged at the axial end of the guide pin shaft, and the end of the connecting stud is fixedly connected to the brake caliper bracket through a thread.

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