Low dragging caliper

Abstract

The invention relates to the field of brakes, and discloses a low dragging caliper which comprises a caliper body and a return mechanism, a counter bore is formed in the caliper body, a first through hole is formed in the bottom face of the counter bore, a connecting hole is formed in a brake block, the first through hole and the connecting hole are coaxially arranged, the return mechanism is installed in the counter bore, and one end of the return mechanism penetrates out of the first through hole to be installed in the connecting hole; the return mechanism comprises a guide rod and a return spring, one end of the return spring abuts against the guide rod, the other end of the return spring abuts against the bottom face of the mounting groove, and the guide rod is connected into the connecting hole from the first through hole. The low-dragging calipers have the advantages of being stable in returning, free of clamping stagnation, long in service life and the like.

Description

Technical Field

[0001] The present invention relates to the field of brakes, and in particular to a low-drag caliper. Background Art

[0002] Chinese patent document CN212804007U discloses a return mechanism for a pneumatic disc brake, which realizes the return of the brake pad by means of screws and stacked springs. However, this design has the following disadvantages. First, the stacked spring structure is arranged on the outside, which has a short service life and requires a guide sleeve structure for guidance. What is more serious is that under this scheme, the screw and the bracket are fixedly connected, and there is no deformation between the two. However, the braking situation of the vehicle is very complicated, and it is difficult to ensure that the braking force of the brake pad is the same in real time. In addition, vibration will also be generated. In this case, the screw is prone to deformation and jamming against the inner wall. If braking is performed after deformation, noise and untimely braking and return will occur. Summary of the invention

[0003] The present invention aims at the disadvantages of the prior art and provides a low-drag caliper.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A low-drag caliper comprises a caliper body and a return mechanism, wherein a countersunk hole is arranged on the caliper body, a through hole 1 is arranged on the bottom surface of the countersunk hole, a connecting hole is arranged on the brake block, the through hole 1 and the connecting hole are arranged coaxially, and the return mechanism is installed in the countersunk hole and one end of the return mechanism passes through the through hole 1 and is installed in the connecting hole;

[0006] The return mechanism comprises a guide rod and a return spring, one end of the return spring abuts against the guide rod, and the other end abuts against the bottom surface of the mounting groove, and the guide rod is connected to the connecting hole from through hole one.

[0007] This solution also includes an elastic member, which is located at one end of the guide rod connected to the brake block. The elastic member and the guide rod are an integrally formed structure or the elastic member and the guide rod are detachably fixedly connected; the elastic member includes an elastic claw, which is located around the guide rod and is used to limit the relative displacement between the guide rod and the brake block; a limiting portion that limits the elastic member from coming out is provided on the inner edge of the opening of the connection hole, and the outer side of the elastic claw abuts against the inner side of the connection hole, and the end face of the elastic claw close to one end of the return spring abuts against the limiting portion. This structural design can ensure that the guide rod and the brake block are fixedly connected while having a certain ability to undergo relative lateral displacement under force, thereby avoiding the phenomenon of the guide rod being bent under direct force.

[0008] A gap is formed between the elastic claws, and a release is formed between the limiting parts; the elastic claws form a lock core structure, and the release forms a lock hole structure; there is at least one position in the lock core structure corresponding to the lock hole structure, so that the elastic claw can be taken out from the release. The gap corresponds to the limiting part, and the release corresponds to the elastic claw. Only when the two correspond one to one, the elastic claw can be separated from the release, so that the guide rod and the brake block are disconnected.

[0009] Preferably, there are multiple elastic claws arranged along the circumferential direction of the side surface of the guide rod, and gaps are formed between the elastic claws.

[0010] Preferably, the widths of the elastic claws are different or not completely the same; and the elastic claws correspond to the release openings one by one.

[0011] Preferably, the elastic member is detachably connected to the guide rod, the guide rod is provided with an annular mounting groove on its outer side, the elastic member includes a mounting ring, the elastic claw is fixedly connected to the mounting ring, and the mounting ring is sleeved in the mounting groove and fixedly connected to the guide rod.

[0012] Preferably, the cross-sectional diameter of the side of the mounting groove is smaller near the spring end and larger away from the spring end, the inner side surface of the mounting ring is adapted to the side shape of the mounting groove, and the mounting ring is transformed into a non-closed ring structure by providing a through deformation opening.

[0013] Preferably, the inner diameter of the mounting ring is smaller than the outer diameter of the outer side surface of the mounting groove, and a limit ring is arranged on the guide rod. The limit rings are located at both ends of the axial direction of the outer side surface of the mounting groove, and the limit rings and the guide rod form a mounting groove; the outer diameter of the cross-section of the outer side surface of the mounting groove is at least partially larger than the outer diameter of the main rod part of the guide rod; the mounting ring is located between the limit rings and the two ends are restricted and abutted on the two limit rings.

[0014] Preferably, an adjustment hole is provided at one end of the guide rod away from the brake block.

[0015] Preferably, an outer side surface of one end of the guide rod connected to the brake block is provided with an external thread.

[0016] Compared with the prior art, this solution has the following beneficial effects: the caliper designed in this solution has stable and reliable return, can adapt to the shaking during the braking process, has a long service life, reliable sealing, and is easy to install, maintain and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of the device.

[0018] Figure 2 for Figure 1 Top view of the .

[0019] Figure 3 yes Figure 2 sectional view of .

[0020] Figure 4 yes Figure 3 A partial enlarged view of .

[0021] Figure 5 It is a schematic diagram of the cooperation between the brake block and the return mechanism.

[0022] Figure 6 yes Figure 5 A partial enlarged view of .

[0023] Figure 7 It is a structural diagram of the return mechanism.

[0024] Figure 8 It is a structural schematic diagram of the guide rod.

[0025] Fig. 9 It is a schematic diagram of the structure of the elastic member.

[0026] The technical names of the accompanying drawings are: 1-caliper body, 2-return mechanism, 3-through hole 1, 4-connecting hole, 5-countersunk hole, 6-guide rod, 7-return spring, 8-brake block, 9-elastic member, 10-elastic claw, 11-limiting part, 12-release mouth, 13-gap, 14-mounting groove, 15-mounting ring, 16-deformation mouth, 17-adjusting hole, 18-main rod part, 19-limiting ring. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] Example 1

[0029] A low-drag caliper, comprising a caliper body 1 and a return mechanism 2, wherein the caliper body 1 is provided with a countersunk hole 5, a through hole 1 3 is provided on the bottom surface of the countersunk hole 5, a connecting hole 4 is provided on the brake block 8, the through hole 1 3 and the connecting hole 4 are coaxially arranged, and the return mechanism 2 is installed in the countersunk hole 5 and one end thereof passes through the through hole 1 3 and is installed in the connecting hole 4;

[0030] The return mechanism 2 includes a guide rod 6 and a return spring 7. One end of the return spring 7 abuts against the guide rod 6, and the other end abuts against the bottom surface of the mounting groove 14. The guide rod 6 is connected to the connecting hole 4 from the through hole 1 3 .

[0031] The present solution also includes an elastic member 9, which is located at one end of the guide rod 6 connected to the brake block 8. The elastic member 9 and the guide rod 6 are an integrally formed structure or the elastic member 9 and the guide rod 6 are detachably fixedly connected; the elastic member 9 includes an elastic claw 10, which is located around the guide rod 6 and is used to limit the relative displacement between the guide rod 6 and the brake block 8; the inner edge of the opening of the connecting hole 4 is provided with a limiting portion 11 for limiting the elastic member 9 from coming out, the outer side of the elastic claw 10 abuts against the inner side of the connecting hole 4, and the end face of the elastic claw 10 close to one end of the return spring 7 abuts against the limiting portion 11. This structural design can ensure that the guide rod 6 and the brake block 8 are fixedly connected and have a certain ability to be subjected to relative lateral displacement under force, thereby avoiding the phenomenon of bending of the guide rod 6 under direct force. In the present embodiment, the elastic member 9 is an annular structure that covers the four sides of the guide rod 6. Of course, the elastic member 9 can also be an integrally formed structure with the guide rod 6. The elastic claws 10 are located around the guide rod 6 and extend outwards, and a space for deformation is formed between the elastic claws 10 and the guide rod 6. The deformation space can absorb the fluctuation caused by the shaking and vibration of the brake block 8.

[0032] A gap 13 is formed between the elastic claws 10, and a release 12 is formed between the limiting parts 11; the elastic claws 10 form a lock core structure, and the release 12 forms a lock hole structure; there is at least one position in the lock core structure corresponding to the lock hole structure, so that the elastic claw 10 can be taken out from the release 12. Among them, the gap 13 corresponds to the limiting part 11, and the release 12 corresponds to the elastic claw 10. Only when the two correspond one to one, the elastic claw 10 can be disengaged from the release 12 so that the guide rod 6 and the brake block 8 are disconnected. The brake return mechanism 2 is installed on the caliper body 1 and connected to the brake block 8. The brake block 8 generally includes a back plate and a friction plate installed on the back plate. The guide rod 6 is connected to the back plate, and the back plate can drive the guide rod 6 to move synchronously. At the same time, when the guide rod 6 moves, it will compress the return spring 7. After the braking force is removed, the return spring 7 will drive the guide rod 6 to return to its original position.

[0033] The width of each elastic claw 10 is different or the width of each elastic claw 10 is not completely the same; in this embodiment, the width of each elastic claw 10 is the same, and each elastic claw 10 corresponds to each release 12 one by one. That is, the problem of easy falling off when each elastic claw 10 has the same shape and is evenly distributed in the circumferential direction is avoided. If the width of each elastic claw 10 is the same, it will generate vibration during the braking operation, so that the elastic member 9 and the adjustment rod will rotate slightly. The longer the working time, the accumulated rotation angle will inevitably increase gradually. Therefore, as long as one elastic claw 10 is stuck in the groove of the friction plate due to rotation, the remaining elastic claws 10 will be stuck, and the risk of overall falling off will increase later. After setting the elastic claws 10 of different widths, they need to be simultaneously transferred into the release 12 of the corresponding width to fall off, that is, only one position or a few positions can be opened, which greatly increases its reliability.

[0034] Specifically in this solution, the elastic member 9 is detachably connected to the guide rod 6, the elastic member 9 is an independent integrated structure, the guide rod 6 is provided with an annular mounting groove 14 on its outer side, the elastic member 9 includes a mounting ring 15, the elastic claw 10 is fixedly connected to the mounting ring 15, and the mounting ring 15 is sleeved in the mounting groove 14 and fixedly connected to the guide rod 6. The inner annular surface of the mounting ring 15 has the same slope as the outer side surface of the mounting groove 14, and the outer diameter of the outer side surface of the mounting groove 14 is larger than the corresponding inner annular surface of the mounting ring 15.

[0035] In this solution, the cross-sectional diameter of the side of the mounting groove 14 is smaller near the spring end and larger away from the spring end, and the inner side of the mounting ring 15 is adapted to the side shape of the mounting groove 14. The mounting ring 15 is provided with a through deformation opening 16 to make the mounting ring 15 a non-closed ring structure. This structural design allows the mounting ring 15 to match the mounting groove 14 structure of different sizes, thereby reducing the dimensional accuracy requirements of the mounting groove 14.

[0036] The inner diameter of the mounting ring 15 is smaller than the outer diameter of the outer side of the mounting groove 14; the guide rod 6 is provided with a limit ring 19, the limit ring 19 is located at both ends of the axial direction of the outer side of the mounting groove 14, and the limit ring 19 and the guide rod 6 surround the mounting groove 14; the outer diameter of the cross section of the outer side of the mounting groove 14 is at least partially larger than the outer diameter of the main rod part 18 of the guide rod 6; the mounting ring 15 is located between the limit rings 19 and the two ends are limited and abutted on the two limit rings 19. The above function can be achieved by setting the inner hole diameter of the limit ring 19, and the specific size and structure design can refer to the attached figure. The limit ring 19 is provided with a guide block 20, and the mounting ring is provided with a guide groove corresponding to the guide block 20.

[0037] In this solution, an adjustment hole 17 is provided at one end of the guide rod 6 away from the brake block 8. The adjustment hole 17 is used to rotate the guide rod 6 to adjust the position of the elastic claw 10 so that the elastic claw 10 and the guide rod 6 can be separated from the assembly structure.

[0038] During installation, first, the elastic member 9 is sleeved in the installation groove 14. The upper and lower ends of the elastic member 9 are limited by the limiting rings 19 on both sides of the installation groove 14. The elastic member 9 and the guide rod 6 are fixedly connected. Then the elastic member 9 is inserted into the connecting hole 4. Since the external cross-section of the elastic member 9 is a structure of small bottom and large top, and the large cross-section part is an elastic claw 10 structure, the elastic member 9 can be accurately inserted into the connecting hole 4 so that the upper end surface of the elastic claw 10 contacts the inner side of the limiting portion 11, and the elastic claw 10 contacts the inner wall of the connecting hole 4 outward, so that the guide rod 6 and the brake block 8 are fixedly connected.

[0039] When disassembly is required, a tool is inserted into the adjustment hole 17 , and then the guide rod 6 is rotated to make the elastic claw 10 correspond to the corresponding release opening 12 , and then the elastic claw 10 can be pulled out of the release opening 12 by pulling outward.

[0040] Example 2

[0041] The difference between this embodiment and the first embodiment is that an outer side surface of one end of the guide rod 6 connected to the brake block 8 is provided with an external thread, and the guide rod 6 and the brake block 8 are fixed together by a threaded connection.

[0042] Example 3

[0043] The difference between this embodiment and the first embodiment is that the elastic member 9 and the guide rod 6 are an integrally formed structure.

[0044] Example 4

[0045] The difference between this embodiment and the first embodiment is that the elastic claws 10 are directly fixedly mounted on the guide rod 6 and are distributed along the circumferential direction of the guide rod 6 .

[0046] Example 5

[0047] The difference between this embodiment and the first embodiment is that the elastic member 9 is fixedly connected to the guide rod 6 by sleeve connection, bonding or other methods.

Claims

1. Low drag caliper, characterized by: The invention comprises a caliper body (1) and a return mechanism (2), wherein the caliper body (1) is provided with a countersunk hole (5), a through hole (3) is provided on the bottom surface of the countersunk hole (5), a connecting hole (4) is provided on the brake block (8), the through hole (3) and the connecting hole (4) are coaxially arranged, and the return mechanism (2) is installed in the countersunk hole (5) and one end of the return mechanism (2) passes through the through hole (3) and is installed in the connecting hole (4); The return mechanism (2) comprises a guide rod (6) and a return spring (7). One end of the return spring (7) abuts against the guide rod (6) and the other end abuts against the bottom surface of the mounting groove (14). The guide rod (6) is connected to the connecting hole (4) from the through hole 1 (3).

2. The low drag caliper according to claim 1, characterized in that: The invention also comprises an elastic member (9), the elastic member (9) being located at one end where the guide rod (6) is connected to the brake block (8), the elastic member (9) and the guide rod (6) being an integrally formed structure or the elastic member (9) and the guide rod (6) being detachably fixedly connected; the elastic member (9) comprising an elastic claw (10), the elastic claw (10) being located around the guide rod (6) and used for limiting the relative displacement between the guide rod (6) and the brake block (8); a limiting portion (11) for limiting the elastic member (9) from coming out is arranged at the inner edge of the opening of the connecting hole (4), the outer side surface of the elastic claw (10) abuts against the inner side surface of the connecting hole (4), and the end surface of the elastic claw (10) close to one end of the return spring (7) abuts against the limiting portion (11).

3. The low drag caliper according to claim 2, characterized in that: A gap (13) is formed between the elastic claws (10), and a release opening (12) is formed between the limiting parts (11); the elastic claws (10) form a lock core structure, and the release opening (12) forms a lock hole structure; the lock core structure has at least one position corresponding to the lock hole structure, so that the elastic claws (10) can be taken out from the release opening (12).

4. The low drag caliper according to claim 3, characterized in that: There are a plurality of elastic claws (10) arranged along the circumferential direction of the side surface of the guide rod (6), and gaps (13) are formed between the elastic claws (10).

5. The low drag caliper according to claim 4, characterized in that: The widths of the elastic claws (10) are different or the widths of the elastic claws (10) are not completely the same; and the elastic claws (10) correspond one to one with the release openings (12).

6. The low drag caliper according to claim 3, 4 or 5, characterized in that: The elastic member (9) is detachably connected to the guide rod (6); an annular mounting groove (14) is provided on the outer side of the guide rod (6); the elastic member (9) comprises a mounting ring (15); the elastic claw (10) is fixedly connected to the mounting ring (15); the mounting ring (15) is sleeved in the mounting groove (14) and fixedly connected to the guide rod (6).

7. The low drag caliper according to claim 6, characterized in that: The cross-sectional diameter of the side surface of the mounting groove (14) is smaller near the spring end and larger away from the spring end. The inner side surface of the mounting ring (15) is adapted to the shape of the side surface of the mounting groove (14). The mounting ring (15) is provided with a through deformation opening (16) so that the mounting ring (15) becomes a non-closed ring structure.

8. The low drag caliper according to claim 6, characterized in that: The inner diameter of the mounting ring (15) is smaller than the outer diameter of the outer side surface of the mounting groove (14); a limiting ring (19) is arranged on the guide rod (6); the limiting rings (19) are located at two axial ends of the outer side surface of the mounting groove (14); the limiting rings (19) and the guide rod (6) surround the mounting groove (14); the outer diameter of the cross section of the outer side surface of the mounting groove (14) is at least partially larger than the outer diameter of the main rod portion (18) of the guide rod (6); the mounting ring (15) is located between the limiting rings (19) and the two ends are restricted and abutted on the two limiting rings (19); or the limiting rings (19) are provided with guide blocks (20), and the mounting ring is provided with guide grooves corresponding to the guide blocks (20).

9. The low drag caliper according to claim 1 or 2 or 3 or 4 or 5, characterized in that: An adjustment hole (17) is provided at one end of the guide rod (6) away from the brake block (8).

10. The low drag caliper according to claim 1, characterized in that: An external thread is arranged on the outer side surface of one end of the guide rod (6) connected to the brake block (8).

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