BRAKE CALIPER ASSEMBLY, BRAKE AND VEHICLE

Abstract

The disclosure relates to the technical field of vehicles, and particularly provides a brake caliper assembly, a brake, and a vehicle, aiming to solve the problem of how to increase the maximum deflection that a leaf spring can bear on the premise of ensuring an elastic restoring force of the leaf spring. The brake caliper assembly of the disclosure comprises a leaf spring arranged between a first brake caliper and a second brake caliper. The leaf spring comprises an elastic structure. The elastic structure comprises a bending portion, an extending portion, an outward-expanding portion, and an abutting portion that are connected in sequence; the outward-expanding portion extends to the outside of the leaf spring from the extending portion, the bending portion is bent inwards, and the abutting portion abuts on the first brake caliper and/or the second brake caliper. According to the disclosure, the maximum deflection that the leaf spring can bear can be increased on the premise of ensuring the elastic restoring force of the leaf spring.

Claims

1. A brake caliper assembly, comprising a first brake caliper, a second brake caliper, a drive assembly, and a leaf spring, the first brake caliper and the second brake caliper symmetrically arranged on either side of a to-be-braked member, and the drive assembly configured to enable the first brake caliper and/or the second brake caliper to abut against the to-be-braked member so as to brake the to-be-braked member, wherein the leaf spring is arranged between the first brake caliper and the second brake caliper and comprises an elastic structure, the elastic structure comprises a bending portion, an extending portion, an outward-expanding portion, and an abutting portion that are connected in sequence, the outward-extending portion extends from the extending portion to the outside of the leaf spring, the bending portion is bent inwards, and the abutting portion abuts on the first brake caliper and/or the second brake caliper.

2. The brake caliper assembly according to claim 1, further comprising a mounting member arranged between the first brake caliper and the second brake caliper, the leaf spring being fixedly connected to the mounting member.

3. The brake caliper assembly according to claim 2, wherein: the mounting member comprises a body and a support portion, two sides of the body substantially extending vertically to form the support portion; and the leaf spring further comprises a connecting structure and a retaining portion that are connected to each other, the retaining portion is connected to the bending portion, and when the assembling is completed, the connecting structure is fixedly connected to the body, and the retaining portion abuts against an outer side of the support portion.

4. The brake caliper assembly according to claim 3, wherein the connecting structure comprises a connecting portion and an arch portion that are connected to each other, the arch portion is connected between the connecting portion and the pressing portion, and when the assembling is completed, the connecting portion is fixedly connected to the body, and the arch portion is located above a joint between the body and support portion to avoid the joint.

5. The brake caliper assembly according to claim 2, wherein the mounting member comprises a body and a support portion, and the leaf spring is fixedly connected to the support portion.

6. The brake caliper assembly according to claim 3, wherein the retaining portion is in smooth connection with the bending portion.

7. The brake caliper assembly according to claim 1, wherein the bending portion is an arc-shaped bending portion.

8. The brake caliper assembly according to claim 1, wherein width of the bending portion, the extending portion, the outward-expanding portion, and the abutting portion gradually decreases from the bending portion to the abutting portion.

9. The brake caliper assembly according to claim 2, wherein the first brake caliper comprises a first caliper body and a first friction member, the second brake caliper comprises a second caliper body and a second friction member, the first friction member is located on one side, close to the to-be-braked member, of the first caliper body, and is movably connected to the first caliper body, and the second friction member is located on one side, close to the to-be-braked member, of the second caliper body, and is movably connected to the second caliper body, and the drive assembly is configured to enable the first friction member and/or the second friction member to move relative to the first caliper body and the second caliper body, so that the first friction member and/or the second friction member abuts against the to-be-braked member to brake the to-be-braked member.

10. The brake caliper assembly according to claim 9, further comprising a pressing member, wherein the mounting member is connected to the first caliper body and/or the second caliper body, the pressing member is fixedly connected to the mounting member, and two ends of the pressing member are respectively pressed against the first friction member and the second friction member to prevent the first friction member and the second friction member from shaking.

11. The brake caliper assembly according to claim 10, wherein the pressing member is riveted to the mounting member, and a riveting hole in the pressing member is a specially shaped hole.

12. The brake caliper assembly according to claim 9, wherein the leaf spring comprises two elastic structures, when the brake caliper assembly is in an inoperative state, a distance between the first friction member and the second friction member is less than a free width of the leaf spring, wherein the free width is a distance between an outer side of an abutting portion of one of the elastic structures and an outer side of an abutting portion of the other of the elastic structures when the leaf spring is in a free state.

13. The brake caliper assembly according to claim 1, wherein the abutting portion is of an arc-shaped structure, and the abutting portion abuts on the first brake caliper and/or the second brake caliper through an outer curved surface of the arc-shaped structure.

14. A brake, comprising a brake caliper assembly, the brake caliper assembly comprising a first brake caliper, a second brake caliper, a drive assembly, an leaf spring, and a to-be-braked member including a brake disc, the first brake caliper and the second brake caliper symmetrically arranged on either side of the to-be-braked member, and the drive assembly being configured to enable the first brake caliper and/or the second brake caliper to abut against the to-be-braked member so as to brake the to-be-braked member, wherein the leaf spring is arranged between the first brake caliper and the second brake caliper and comprises an elastic structure, the elastic structure comprises a bending portion, an extending portion, an outward-expanding portion, and an abutting portion that are connected in sequence, the outward-extending portion extends from the extending portion to the outside of the leaf spring, the bending portion is bent inwards, and the abutting portion abuts on the first brake caliper and/or the second brake caliper.

15. A vehicle, comprising a brake, the brake comprising a brake caliper assembly, the brake caliper assembly comprising a first brake caliper, a second brake caliper, a drive assembly, an leaf spring, and a to-be-braked member including a brake disc, the first brake caliper and the second brake caliper symmetrically arranged on either side of the to-be-braked member, and the drive assembly being configured to enable the first brake caliper and/or the second brake caliper to abut against the to-be-braked member so as to brake the to-be-braked member, wherein the leaf spring is arranged between the first brake caliper and the second brake caliper and comprises an elastic structure, the elastic structure comprises a bending portion, an extending portion, an outward-expanding portion, and an abutting portion that are connected in sequence, the outward-extending portion extends from the extending portion to the outside of the leaf spring, the bending portion is bent inwards, and the abutting portion abuts on the first brake caliper and/or the second brake caliper.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0039] Preferred embodiments of the disclosure are described below with reference to the accompanying drawings, in which:

[0040] FIG. 1 is a schematic structural diagram of an existing vehicle brake, which shows a situation of the brake in an inoperative state;

[0041] FIG. 2 is a schematic structural diagram of an embodiment of a brake caliper assembly in a brake of the disclosure;

[0042] FIG. 3 is a schematic structural diagram of an embodiment of a brake caliper assembly in a brake of the disclosure after a first caliper body and a second caliper body are hidden;

[0043] FIG. 4 is a schematic structural diagram of an embodiment of a mounting member, a pressing member, and a leaf spring in a brake of the disclosure;

[0044] FIG. 5 is a partial enlarged view of portion A in FIG. 4; and

[0045] FIG. 6 is a schematic structural diagram of another embodiment of a brake of the disclosure.

REFERENCE SIGNS

[0046] 1. brake; 11. brake disc; 12. brake caliper; 13. piston; 14. friction pad; 15. friction pad mounting base; [0047] 21. first brake caliper; 211. first caliper body; 212. first friction member; 2121. first friction pad; 2122. first friction pad mounting base; 22. second brake caliper; 221. second caliper body; 222. second friction member; 2221. second friction pad; 2222. second friction pad mounting base; 23. mounting member; 231. body; 232. support portion; 24. pressing member; 25. leaf spring; 251. bending portion; 252. extending portion; 253. outward-expanding portion; 254. abutting portion; 255. connecting structure; 2551. connecting portion; 2552. arch portion; 256. retaining portion; 26. connecting rod; 27. rivet; [0048] 3. brake; 31. brake disc; 32. first clamp body; 33. second clamp body; 34. piston; 35. first friction pad; 36. first friction pad mounting base; 37. second friction pad; 38. second friction pad mounting base; 39. bracket; 3901. pin; and [0049] 100. cavity.

DETAILED DESCRIPTION

[0050] The preferred embodiments of the disclosure are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principles of the disclosure and are not intended to limit the scope of protection of the disclosure. For example, although this embodiment is described by taking a vehicle brake and its brake caliper assembly as an example, this is not intended to limit the scope of protection of the disclosure. Those skilled in the art can apply the brake caliper assembly and the brake of the disclosure to other application scenarios without departing from the principles of the disclosure. For example, the brake caliper assembly of the disclosure may also be applied to a scenario where a to-be-brake member is of a block structure that can reciprocate between a first brake caliper and a second brake caliper; the brake of the disclosure is not limited to be used in the vehicle to hinder the movement of wheels, it can also be used in another device to brake parts in the device, as long as the parts of the device can be braked by the brake of the disclosure. In addition, it should be noted that the vehicle may be a fuel vehicle, an electric vehicle, a gasoline-electric hybrid vehicle, or the like. The adjustment and change in vehicle type do not constitute a limitation on the disclosure and should be subject to the scope of protection of the disclosure.

[0051] It should be noted that, in the description of the disclosure, “front,” “rear,” “upper” and “lower” are based on a normal placement state of the vehicle, where “front” refers to a head direction of the vehicle, “rear” refers to a rear direction of the vehicle, “upper” refers to a roof direction, and “lower” refers to a vehicle bottom direction. “Inner” and “outer” are based on a normal installation state of the brake under the normal placement state of the vehicle. “Inner” refers to being between the first brake caliper and the second brake caliper in the brake of the vehicle. “Outer” refers to, in the brake of the vehicle, a direction of the other side of the first caliper horizontally opposite the inside of the first brake caliper and a direction of the other side of the second brake caliper horizontally opposite the inside of the second brake caliper direction. The terms that indicate the direction or positional relationship, such as “front,” “rear,” “upper,” “lower,” “vertical,” and “upright,” are based on the direction or positional relationship shown in the figures, which are merely for ease of description instead of indicating or implying that the device or element must have a particular orientation and be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the disclosure. In addition, the terms “first,” “second” and “third” are for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In addition, it should also be noted that, in the description of the disclosure, the terms “arrangement,” “mounting,” “mutual connection,” and “connection” should be interpreted in a broad sense unless explicitly defined and limited otherwise. For example, a connection may be a fixed connection, a detachable connection, or an integral connection; or may mean a direct connection, an indirect connection by means of an intermediary, or internal communication between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the disclosure can be interpreted according to the specific situation.

[0053] Based on the problem of how to increase the maximum deflection allowed by a leaf spring on the premise of ensuring an elastic restoring force of the leaf spring pointed out in the Background Art, the disclosure provides a brake caliper assembly with a leaf spring, aiming to increase the maximum deflection that the leaf spring can bear on the premise of ensuring the elastic restoring force of the leaf spring.

[0054] The technical solutions of the disclosure will be described in detail below with reference to a brake of a vehicle.

[0055] The brake of the vehicle includes a brake caliper assembly and a brake disc. The brake disc is fixedly connected to a wheel of the vehicle. The brake restricts the movement of the brake disc through the brake caliper assembly to hinder the rotation of the wheel, thereby realizing braking of the vehicle. As shown in FIGS. 2 and 3, the brake caliper assembly comprises a first brake caliper 21, a second brake caliper 22, a drive assembly, a mounting member 23, a pressing member 24, leaf springs 25 and connecting rods 26. The first brake caliper 21 comprises a first caliper body 211 and a first friction member 212, and the first friction member 212 comprises a first friction pad 2121 and a first friction pad mounting base 2122 that are connected to each other. The second brake caliper 22 comprises a second caliper body 221 and a second friction member 222, and the second friction member 222 comprises a second friction pad 2221 and a second friction pad mounting base 2222 that are connected to each other. The drive assembly comprises a first piston and a second piston.

[0056] In the case where the brake is installed in the vehicle, continuing to refer to FIGS. 2 and 3, the first caliper body 211 and the second caliper body 221 are arranged opposite each other and are located on two sides, respectively, of the brake disc; the first caliper body 211 and the second caliper body 221 are respectively provided with a cavity internally; at least a part of the first piston is accommodated in the cavity of the first caliper body 211, and the first piston is slidably connected to one side, close to the brake disc, of the first caliper body 211; at least a part of the second piston is accommodated in the cavity of the second caliper body 221, and the second piston is slidably connected to one side, close to the brake disc, of the second caliper body 221. The first friction member 212 and the second friction member 222 are both located between the first piston and the second piston. The first friction pad mounting base 2122 is in contact with the first piston, and the first friction pad 2121 is fixedly connected to one side, close to the brake disc, of the first friction pad mounting base 2122. The second friction pad mounting base 2222 is in contact with the second piston, and the second friction pad 2221 is fixedly connected to one side, close to the brake disc, of the second friction pad mounting base 2222. Two connecting rods 26 are respectively arranged at the front and the rear of the caliper body, and both ends of the two connecting rods 26 are respectively connected to the first caliper body 211 and the second caliper body 221. The two connecting rods 26 sequentially pass through the first friction pad mounting base 2122 and the second friction pad mounting base 2222. The two friction pad mounting bases can slide along extending directions of the two connecting rods 26. The mounting member 23 is arranged between the first brake caliper 21 and the second brake caliper 22. The mounting member 23 extends in a front-rear direction. The front and rear ends of the mounting member 23 are respectively clamped on the two connecting rods 26. There are two leaf springs 25. One leaf spring 25, the pressing member 24 and the other leaf spring 25 are arranged in sequence from front to rear, are fixedly connected to the mounting member 23, and are all located above the brake disc to avoid the respective interference of the leaf springs 25 and the pressing member 24 with the brake disc after the friction pads are worn. The two leaf springs 25 are both arranged between the first friction member 212 and the second friction member 222, and each of the two leaf springs 25 has both ends abut on the first friction pad mounting base 2122 and the second friction pad mounting base 2222 respectively.

[0057] The cavities of the first brake caliper 21 and the second brake caliper 22 both fluidly communicate with a vehicle hydraulic system and are filled with a brake fluid from the vehicle hydraulic system. The hydraulic system can control the brake fluid pressure in the cavities of the two caliper bodies. When a driver depresses a brake pedal according to the need of braking, the hydraulic system acts to increase the brake fluid pressure in the cavities of the two brake caliper bodies, so that the two pistons move toward a direction close to the brake disc until the two friction pads abut against the brake disc, that is, the two friction pads abut on the brake disc and produce an interaction force, and the brake disc rotating with the wheel slows down or even stops under the friction action of the friction pads so as to realize braking of the wheel. During braking, the two friction pads gradually approach the brake disc, and the leaf springs 25 are compressed. When canceling the braking, the driver fully releases the brake pedal, and the hydraulic system acts such that the brake fluid pressure in the cavities of the brake caliper bodies is reduced to allow the friction pads to move away from the brake disc. At this point, the leaf springs 25 assists in moving of the two friction pads through its elastic restoring action and finally restore the two friction pads to the position where they are in the inoperative state.

[0058] In order to increase the maximum deflection allowed by each leaf spring 25 on the premise of ensuring the elastic restoring force of the leaf spring 25, as shown in FIGS. 3 and 4, each leaf spring 25 is of an elastic structure. The elastic structure comprises a bending portion 251, an extending portion 252, an outward-expanding portion 253, and an abutting portion 254 that are connected in sequence, the outward-extending portion 253 extends from the extending portion 252 to the outside of the leaf spring 25, the bending portion 251 is bent inwards, and the abutting portion 254 abuts on the first friction pad mounting base 2122 and the second friction pad mounting base 2222. Furthermore, in FIGS. 3 and 4, the bending portion 251 is of an arc-shaped bending portion 251. Specifically, the arc-shaped bending portion 251 may be a circular arc-shaped bending portion, or an elliptical arc-shaped bending portion. In addition, although in FIGS. 3 and 4, the extending portion 252 extends straightly and flatly, and its extending direction is neither inward nor outward, the extending portion 252 may also extend inward or outward, or the like.

[0059] When the first brake caliper 21 and the second brake caliper 22 are close to each other, the elastic structure of the leaf spring 25 that abuts on the first friction pad mounting base 2122 and the second friction pad mounting base 2222 is compressed and deformed. During compression and deformation, since the bending portion is bent inward and the outward-expanding portion extends from the extending portion to the outside, an inward bending angle of the bending portion will become smaller, an outward expanding angle of the outward-expanding portion will become larger, and the overall deformation of the elastic structure is shared by the bending portion and the outward-expanding portion, so that the plastic deformation is avoided, and the maximum deflection that the leaf spring can bear can also be increased correspondingly. Moreover, in the technical solution, the thickness of the leaf spring 25 is not reduced, and accordingly, a reduction of the elastic restoring force of the leaf spring 25 can also be avoided. It can be seen that the structure of the leaf spring 25 of the disclosure can increase the maximum deflection that the leaf spring 25 can bear on the premise of ensuring the elastic restoring force of the leaf spring 25.

[0060] In the case where the bending portion is an arc-shaped bending portion, during compression and deformation of the elastic structure of the leaf spring 25, the arc-shaped bending portion 251 is more likely to be deformed, and the strain on the bending portion 251 is relatively uniformly dispersed on the entire bending portion 251. The stress in the bending portion 251 will not be seriously concentrated at a certain position on the bending portion, therefore, the bending portion 251 can bear a relatively large amount of deformation and is less prone to a plastic deformation, thereby further increasing the maximum deflection that the leaf spring 25 can bear.

[0061] In addition, in the brake of the disclosure, a portion located between the extending portion 252 and the abutting portion 254 gradually extends from the extending portion 252 to the outer side of the leaf spring 25. In comparison to an arrangement where the portion between the extending portion 252 and the abutting portion 254 is configured to gradually extend from the extending portion 252 to the inner side of the leaf spring 25, the arrangement in this technical solution can reduce the possibility of interference between the leaf spring 25 and the brake disc, thereby lowering the probability of damage due to a contact between the leaf spring 25 and the brake disc, and avoiding shortening the service lives of the leaf spring 25 and the brake disc to a certain extent.

[0062] As shown in FIG. 5, the mounting member 23 comprises a body 231 and a support portion 232. Two sides of the body 231 substantially extend vertically to form the support portion 232, that is, the support portion 232 is formed by extending substantially from top to bottom. Specifically, the support portion 232 may be formed by extending from the top to the bottom. In addition, the extending direction of the support portion 232 may also be at a certain angle with the standard vertical direction. For example, the included angle is not greater than 45°, as long as the extending direction of the support portion 232 is substantially the direction from top to bottom. As shown in FIGS. 3 to 5, each leaf spring 25 further comprises a connecting structure 255 and a retaining portion 256. The retaining portion 256 is connected to the bending portion 251. When the assembling is completed, the connecting structure 255 is fixed to the body 231, and the retaining portion 256 abuts against an outer side of the support portion 232.

[0063] The retaining portion 256 abuts against the outer side of the support portion 232, that is, the retaining portion 256 abuts against the outer side of the support portion 232, where the force exerted by the retaining portion 256 on the support portion 232 and the force exerted by the support portion 232 on the retaining portion 256 constitute an action-force-reaction-force pair. Therefore, during compression of the leaf spring 25, the support portion 232 of the mounting member 23 can support the retaining portion 256, which assists in improving rigidity of the retaining portion 256, so that the retaining portion 256 is less prone to a deformation, and the impact on a restoring effect of the leaf spring 25 to the first brake caliper 21 and the second brake caliper 22 caused by a reduction of the elastic restoring force of the leaf spring 25 due to the deformation of the retaining portion 256 is avoided to the utmost extent, thereby further ensuring that the first brake caliper 21 and the second brake caliper 22 can be completely separated from the brake disc, and avoiding to the utmost extent that the brake disc is subjected to a braking force from the brake caliper assembly in the inoperative state, which affects the normal operation of the brake disc. Moreover, when the assembling is completed, the above-mentioned leaf spring 25 is configured such that the retaining portion 256 abuts against the outer side of the support portion 232, rather than there is a gap between the retaining portion 256 and the support portion 232, and the retaining portion 256 abuts against the outer side of the support portion 232 until the leaf spring 25 is compressed to a certain extent when the assembling is completed. With this arrangement, when the assembling is completed, a foreign matter can be prevented from being caught between the retaining portion 256 and the support portion 232, and accordingly, the foreign matter is prevented from being sandwiched between the retaining portion 256 and the support portion 232 during abutting, thereby preventing the retaining portion 256 and the support portion 232 from being damaged by the foreign matter, and prolonging the service lives of the leaf spring 25 and the mounting member 23.

[0064] Referring back to FIG. 3 to FIG. 5, the connecting structure 255 comprises a connecting portion 2551 and an arch portion 2552 that are connected to each other, and the arch portion 2552 is connected between the connecting portion 2551 and the retaining portion 256. When the assembling is completed, the connecting portion 2551 is fixedly connected to the body 231 of the mounting member 23, and the arch portion 2552 is located above a joint between the body 231 and support portion 232 to avoid the joint. The arch portion 2552 may be of an arc-shaped structure, or may adopt a plurality of connected strips or the like. Those skilled in the art can flexibly set the specific structure of the arch portion 2552 in practical applications, as long as the structure can be arched to avoid the joint between the body 231 and the support portion 232.

[0065] By avoiding the joint between the body 231 and the support portion 232 of the mounting member 23, the arch portion 2552 can prevent the retaining portion 256 from being opened outwards to fail in being supported by the support portion 232 due to the arrangement that a portion of the leaf spring 25 close to the joint of the two abuts on the joint, thereby ensuring that the support portion 232 can effectively assist in improving the rigidity of the retaining portion 256. Preferably, the retaining portion 256 and the bending portion 251 are in smooth connection, avoiding excessive stress concentrated at the joint between the retaining portion 256 and the bending portion 251, so that the joint between the bending portion 251 and the retaining portion 256 is not easy to be damaged, and the service life of the leaf spring 25 is prolonged.

[0066] When the brake caliper assembly is in an inoperative state, a distance between the first friction pad mounting base 2122 and the second friction pad mounting base 2222 is shorter than the free width of the leaf spring 25. The free width is a distance between an outer side of one abutting portion 254 and an outer side of the other abutting portion 254 when the leaf spring 25 is in a free state. This free state is a state in which the leaf spring 25 is not subjected to an external force that can compress it to be deformed.

[0067] In the inoperative state, the leaf spring 25 can abut on the first friction pad mounting base 2122 and the second friction pad mounting base 2222, and exert a certain pressing force on the first friction pad mounting base 2122 and the second friction pad mounting base 2222, to prevent the first friction member 212 and the second friction member 222 from moving or colliding with the brake disc in the inoperative state, thereby preventing the brake disc being subjected to a braking force from the brake caliper assembly in the inoperative state, which affects the normal operation of the brake disc. Moreover, when the leaf spring 25 is provided with the retaining portion 256, the mounting member 23 has the supporting portion 232. When the retaining portion 256 abuts against the outer side of the support portion 232, a supporting effect of the support portion 232 on the retaining portion 256 can further increase the pressing force exerted by the leaf spring 25 on the first friction pad mounting base 2122 and the second friction pad mounting base 2222, thereby further avoiding affecting the normal operation of the brake disc.

[0068] As shown in FIGS. 3 and 4, width of the bending portion 251, the extending portion 252, the outward-expanding portion 253, and the abutting portion 254 gradually decreases from the bending portion to the abutting portion. For example, in FIGS. 3 and 4, the elastic structure is divided into three segments connected in sequence, a part of the extending portion 252 and the bending portion 251 constitute a first segment with an unchanged width, the rest part of the extending portion 252 constitutes a second segment with a reduced width, and the outward-expanding portion 253 and the abutting portion 254 constitute a third segment with an unchanged width. Of course, when the elastic structure is divided into multiple segments by width, the variation trend of the width of each segment may be different.

[0069] In addition, when the bending portion 251, the extending portion 252, the outward-expanding portion 253 and the abutting portion 254 are arranged close to the brake disc in this order, the possibility of interference between the leaf spring 25 and the brake disc is further reduced, thereby further reducing the probability of damage to the leaf spring 25 and the brake disc, and further avoiding shortening the service lives of the leaf spring 25 and the brake disc.

[0070] As shown in FIGS. 3 and 4, the body 231 of the mounting member 23 and the pressing member 24 are riveted to each other by a rivet 27. A riveting hole in the body 231 is a specially shaped hole. Both ends of the pressing member 24 are pressed against the first friction pad mounting base 2122 and the second friction pad mounting base 2222 respectively to prevent the first friction member 212 and the second friction member 222 from shaking. The specially shaped hole is a non-circular hole, such as a rectangular hole or a zig-zag hole.

[0071] After riveting of the pressing member 24 and the mounting member 23 is completed, a riveting member can completely or partially fill the riveting hole in the pressing member 24 to prevent the pressing member 24 from rotating, so that a pressing effect of the pressing member 24 on the first friction pad mounting base 2122 and the second friction pad mounting base 2222 is ensured, and shaking of the first friction pad mounting base 2122 and the second friction pad mounting base 2222 is avoided, thereby further avoiding affecting the normal operation of the brake disc.

[0072] As shown in FIG. 3, the abutting portion 254 is of an arc-shaped structure, and the abutting portion 254 abuts on the first friction pad mounting base 2122 and the second friction pad mounting base 2222 through an outer curved surface of the arc-shaped structure. The arc-shaped structure may be a circular arc-shaped bending structure, or an elliptical arc-shaped bending structure.

[0073] During compression and deformation of the leaf spring 25, an abutting position of the abutting portion 254 will change. If the abutting portion 254 has a structure of multiple pointed ends, during compression and deformation of the leaf spring 25, the abutting position may suddenly change from one of the pointed ends to the other of the pointed ends. As a result, the abutting portion 254 cannot always abut on the first friction pad mounting base 2122 and the second friction pad mounting base 2222 stably. In this embodiment, the abutting portion 254 is of an arc-shaped structure and abuts on the first friction pad mounting base 2122 and the second friction pad mounting base 2222 through the outer curved surface of the arc-shaped structure, so that during compression and deformation of the leaf spring 25, the abutting position of the abutting portion 254 can gradually change, and the abutting portion 254 can always stably abut on the first friction pad mounting base 2122 and the second friction pad mounting base 2222, thereby achieving a good limiting effect on the first friction pad mounting base 2122 and the second friction pad mounting base 2222.

[0074] It should be noted that the above preferred embodiment is merely used to illustrate the principles of the disclosure and is not intended to limit the scope of protection of the disclosure. Those skilled in the art can adjust the above arrangements without deviating from the principles of the disclosure, so that the disclosure can be applied to more specific application scenarios.

[0075] For example, on the premise of ensuring the operation of the brake, some components in the above embodiments and some structures included in the components can be selected based on specific product requirements. The changed technical solutions do not deviate from the concept of the disclosure, and therefore also fall within the scope of protection of the disclosure. For example, the first friction member 212 and the second friction member 222 may be omitted, and when a brake is applied, the first caliper body 211 and the second caliper body 221 are in direct contact with the brake disc to realize braking. For another example, the friction pad mounting bases in the friction members may be omitted, and the friction pads may be directly and fixedly connected to the pistons. For another example, the two connecting rods 26 may also be omitted, and the friction members may be fixedly connected to the pistons. Slide slots for accommodating the pistons may be provided in the first caliper body 211 and the second caliper body 221. The slide slots may guide sliding directions of the pistons so as to limit moving directions of the friction members. For another example, the pressing member 24 may also be omitted. For another example, both the connecting structure 255 and the retaining portion 256 of the leaf spring 25 may be omitted. Further, in the instances where the leaf spring 25 has the connecting structure 255, the arch portion 2552 in the connecting structure 255 of the leaf spring 25 may also be omitted.

[0076] For another example, in the disclosure, although illustration is made by taking the drive assembly using the piston structure as an example, in some alternative embodiments, in addition to the pistons, a motor, a cylinder, or the like can also be used as the drive assembly.

[0077] In the case where the first friction member 212 is located on one side, close to the brake disc, of the first caliper body 211 and is movably connected to the first caliper body 211, and the second friction member 222 is located on one side, close to the brake disc, of the second caliper body 221 and is connected to the second caliper body 221, the drive assembly may be configured to enable the first friction member 212 and/or the second friction member 222 to move relative to the corresponding first caliper body 211 and/or the second caliper body 221, to make the first friction member 212 and/or the second friction member 222 abut against the brake disc, so as to brake the brake disc. That is, the drive assembly may be configured to enable the first friction member 212 to move relative to the first caliper body 211 that is corresponding to the first friction member 212, so that the first friction member 212 can abut against the brake disc to achieve braking of the brake disc. The drive assembly may also be configured to enable the second friction member 222 to move relative to the second caliper body 221 that is corresponding to the second friction member 222, so that the second friction member 222 can abut against the brake disc to achieve braking of the brake disc. The driving assembly may also be configured to enable the first friction member 212 to move relative to the first caliper body 211 and enable the second friction member 222 to move relative to the second caliper body 221, so that the first friction member 212 and the second friction member 222 can abut against the brake disc to achieve braking of the brake disc.

[0078] In the case where the first friction member 212 is located on one side, close to the brake disc, of the first caliper body 211 and is fixedly connected to the first caliper body 211, and the second friction member 222 is located on one side, close to the brake disc, of the second caliper body 221 and is fixedly connected to the second caliper body 221, the drive assembly may be configured to directly or indirectly enable the first friction member 212, and/or directly or indirectly enable the second friction member 222, so that the first friction member 212 and/or the second friction member 222 can abut against the brake disc to achieve braking of the brake disc.

[0079] For another example, although the above embodiment is illustrated by taking the following as an example: the brake is provided with the mounting member 23, the mounting member 23 comprises the body 231 and the support portion 232, the connecting structure 255 of the leaf spring 25 is fixedly connected to the body 231, the pressing member 24 is connected to the body 231 by riveting, the riveting hole in the pressing member 24 is a specially shaped hole, in other alternative embodiments, the leaf spring 25 may also be fixedly connected to the support portion 232; the mounting member 23 may also comprise the body 231 but without the support portion 232; the mounting member 23 may be omitted, and then, the leaf spring 25 and the pressing member 24 can be directly and fixedly connected to the first brake caliper 21 and/or the second brake caliper 22; the pressing member 24 may also be connected to the support portion 232; the riveting hole in the pressing member 24 may also be a round hole; the specific connection method of the pressing member 24 and the mounting member 23 may also be welding, screwing, or the like.

[0080] For another example, although the above embodiment is illustrated by taking the bending portion 251 as an arc-shaped bending portion as an example, in other alternative embodiments, the bending portion 251 may be configured into a plurality of strips connected smoothly, or the like.

[0081] For another example, although the above embodiment is illustrated by taking the following as an example: the elastic structure is divided into three segments connected in sequence, a part of the extending portion 252 and the bending portion 251 constitute a first segment with an unchanged width, the rest part of the extending portion 252 constitutes a second segment with a reduced width, and the outward-expanding portion 253 and the abutting portion 254 constitute a third segment with an unchanged width, in other alternative embodiments, the elastic structure may also have two segments or four segments connected in sequence. Width of the bending portion 251, the extending portion 252, the outward-expanding portion 253, and the abutting portion 254 may also gradually decrease from the bending portion 251 to the abutting portion 254. Alternatively, the bending portion 251, the extending portion 252, the outward-expanding portion 253, and the abutting portion 254 have the same width.

[0082] For another example, although the above embodiment is illustrated by taking the following as an example: the first friction member 212 is indirectly movably connected to the first caliper body 211 through the two connecting rods 26, and the second friction member 222 is indirectly movably connected to the second caliper body 221 through the two connecting rods 26, this is not intended to limit the scope of protection of the disclosure. In some other embodiments, the first friction member 212 may be indirectly movably connected to the first caliper body 211 by being fixedly connected to the first piston, and the second friction member 222 may be indirectly movably connected to the second caliper body 221 by being fixedly connected to the second piston. Alternatively, as shown in FIG. 6, the brake 3 comprises a brake disc 31, a first clamp body 32, a second clamp body 33, a piston 34, a first friction pad 35, a first friction pad mounting base 36, a second friction pad 37, and a second friction pad mounting base 38. A difference between brake 3 and the brake shown in FIGS. 2 to 5 lies in that the brake 3 further comprises a bracket 39 and a pin 3901 fixedly connected to the bracket, and only the second clamp body 33 of the brake 3 is provided with a cavity 300 for accommodating the brake fluid, the first friction pad mounting base 36 is directly fixedly connected to the first clamp body 32, the second friction pad mounting base 38 is indirectly movably connected to the second clamp body 33 by being fixedly connected to the piston 34, the bracket 39 is fixedly connected onto the vehicle, and the second clamp body 33 is slidably connected to the pin 3901. During braking, a brake fluid pressure in the cavity 300 increases, and the piston 34 slides relative to the second clamp body 33 in a direction close to the brake disc 31 so that the second friction pad 37 abuts against the brake disc 31, and then, the second clamp body 33 and the pin 3901 slide relative to each other, so that the first friction pad 35 also abuts against the brake disc 31, thereby realizing braking.

[0083] For another example, the above embodiment is illustrated by taking the following as an example: the leaf spring 25 comprises two elastic structures, the abutting portions 254 of the two elastic structures are both of an arc-shaped structure, and the two abutting portions 254 respectively abut on the first friction pad mounting base 2122 and the second friction pad mounting base 2222; when the brake caliper assembly is in an inoperative state, the distance between the first friction pad mounting base 2122 and the second friction mounting base 2222 is less than the free width of the leaf spring 25. However, an alternative arrangement is that in the inoperative state, the distance between the first friction pad mounting base 2122 and the second friction pad mounting base 2222 is equal to or greater than the free width of the leaf spring 25; the number of the elastic structures may also be adjusted, for example, the number of the elastic structures is reduced to one; and the structure of the abutting portion 254 may also be adjusted, for example, the abutting portion 254 is of a block structure or the like.

[0084] For another example, although the above embodiment is illustrated by taking the leaf spring 25 above the brake disc as an example, this is not intended to limit the scope of protection of the disclosure. In some other embodiments, when the leaf spring 25 is in contact with the first friction pad mounting base 2122 and the second friction pad mounting base 2222, that is, a lower end of the leaf spring 25 may be located below an upper side face of the brake disc.

[0085] Of course, the above alternative embodiments, or the alternative embodiments and the preferable embodiments may be mixed and/or combined, so as to obtain new embodiments that are suitable for more specific application scenarios by combining the above embodiments.

[0086] Furthermore, those skilled in the art should understand that although some embodiments described herein comprise certain overlapped features, the combinations of the features of different embodiments are within the scope of the disclosure, and such combinations form different embodiments. For example, in the claims of the disclosure, any one of the embodiments set forth thereby can be used in any combination.

[0087] Heretofore, the technical solutions of the disclosure have been described in conjunction with the preferred embodiments shown in the drawings. However, those skilled in the art can readily understand that the scope of protection of the disclosure is not limited to these specific embodiments. Those skilled in the art could make equivalent changes or substitutions to the related technical features without departing from the principles of the disclosure, and all the technical solutions after the changes or the substitutions fall within the scope of protection of the disclosure.