阅读说明：本技术 卡钳制动器摩擦片回位机构、卡钳制动器及汽车 (Caliper brake friction plate return mechanism, caliper brake and automobile ) 是由 郭亮 刘冰 马川 张德志 王永林 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种卡钳制动器摩擦片回位机构、卡钳制动器及汽车,涉及卡钳制动器技术领域,所述摩擦片回位机构包括：至少一个设于两个卡钳罩之间的摩擦片回位组件,每个所述摩擦片回位组件均包括：导向轴和两个弹性复位盘,所述导向轴两端与卡钳罩连接；两个所述弹性复位盘对称套设在所述导向轴上,每个所述弹性复位盘的一面贴合对应的一个摩擦片；当卡钳制动器制动时,每个摩擦片靠近制动盘并驱动对应的一个所述弹性复位盘变形；当卡钳制动器解除制动时,该所述弹性复位盘变形复位并驱使对应的摩擦片与制动盘脱离后回位。本发明的弹性复位盘变形复位并驱使对应的摩擦片与制动盘脱离回位时,采用面接触,摩擦片回位过程中受力平衡,稳定性好。(The invention discloses a caliper brake friction plate return mechanism, a caliper brake and an automobile, and relates to the technical field of caliper brakes, wherein the friction plate return mechanism comprises: at least one friction disc return assembly of locating between two calliper covers, every friction disc return assembly all includes: the elastic reset device comprises a guide shaft and two elastic reset discs, wherein two ends of the guide shaft are connected with a caliper cover; the two elastic reset discs are symmetrically sleeved on the guide shaft, and one surface of each elastic reset disc is attached to a corresponding friction plate; when the caliper brake brakes, each friction plate is close to the brake disc and drives the corresponding elastic reset disc to deform; when the caliper brake releases braking, the elastic reset disc deforms and resets and drives the corresponding friction plate to be separated from the brake disc and then reset. When the elastic reset disc deforms and resets and drives the corresponding friction plate to be separated from the brake disc to return, surface contact is adopted, the friction plate is balanced in stress in the process of returning, and the stability is good.)

1. The utility model provides a caliper brake friction disc return mechanism which characterized in that includes:

at least one friction disc return assembly (1) of locating between two calliper covers (2), every friction disc return assembly (1) all includes:

a guide shaft (11) having both ends connected to the caliper cover (2);

the two elastic reset discs (12) are symmetrically sleeved on the guide shaft (11), and one surface of each elastic reset disc (12) is attached to a corresponding friction plate (3); and

when the caliper brake brakes, each friction plate (3) is close to the brake disc (4) and drives the corresponding elastic reset disc (12) to deform; when the caliper brake releases braking, the elastic reset disc (12) deforms and resets and drives the corresponding friction plate (3) to be separated from the brake disc (4) and then reset.

2. A caliper brake friction disc return mechanism as set forth in claim 1 wherein each of said resilient return discs (12) includes:

a deformable disc (121), said deformable disc (121) tightly fitting over said guide shaft (11);

the hard disc (122) is sleeved on the periphery of the deformable disc (121), the hard disc (122) is attached to a corresponding friction plate (3), and when the friction plate (3) is close to the brake disc (4), the friction plate (3) drives the hard disc (122) and enables the deformable disc (121) to deform.

3. A caliper brake friction disc return mechanism as set forth in claim 2 wherein:

the hard disc (122) is provided with an annular groove (1221), the deformable disc (121) is embedded in the annular groove (1221), and a chamfer (1222) with a preset size is formed on one side, close to the corresponding friction plate (3), of the annular groove (1221).

4. A caliper brake friction disc return mechanism as set forth in claim 2 wherein:

the deformable disc (121) is made of rubber, and the hard disc (122) is made of hard metal.

5. A caliper brake friction disc return mechanism as set forth in claim 1 wherein:

each caliper cover (2) is formed by a piston cavity (21), a piston (22) is arranged in each piston cavity (21), and each piston (22) is used for driving each friction plate (3) to be close to the brake disc (4).

6. A caliper brake friction disc return mechanism as set forth in claim 5 wherein:

and one surface of each friction plate (3) close to the corresponding piston (22) is provided with a flexible plate (5).

7. A caliper brake friction disc return mechanism as set forth in claim 1 wherein:

one end of the guide shaft (11) is provided with a guide shaft sleeve (13).

8. A caliper brake friction disc return mechanism as set forth in claim 1 wherein:

be equipped with two between two calliper cover (2) friction disc return assembly (1), two friction disc return assembly (1) is along the vertical axial section symmetry of wheel.

9. A caliper brake comprising a caliper brake pad return mechanism according to any one of claims 1 to 8.

10. A motor vehicle, characterized in that it comprises a caliper brake according to claim 9.

Technical Field

The invention relates to the technical field of caliper brakes, in particular to a caliper brake friction plate return mechanism, a caliper brake and an automobile.

Background

Along with the increasing requirements of people on energy conservation and environmental protection, it is more and more important to reduce the running resistance of the whole vehicle to reduce the energy consumption of the whole vehicle and increase the running mileage. A great part of the running resistance of the whole vehicle is derived from the dragging force of the brake. A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member (or a moving machine), and is a machine component that stops or decelerates a moving member in a machine. Commonly called brake and brake. The brake mainly comprises a braking frame, a braking piece, an operating device and the like. Some brakes are also equipped with automatic adjustment of the brake clearance.

The caliper brake is a brake commonly used for a whole vehicle. In the braking process of the whole vehicle, the brake converts the brake hydraulic pressure into the pressure of the friction plate pressing on the brake disc to generate friction force, so that brake torque is generated to decelerate or stop the vehicle. However, when the brake is released, the friction plate cannot be actively separated from the brake disc, so that the friction plate and the brake disc can still rub to generate a dragging force during the running of the vehicle, thereby increasing the energy consumption of the whole vehicle.

In the prior art, a steel disc spring is generally adopted to provide a force for a friction disc to separate from a brake disc, the force bearing point is arranged at the upper end of a back plate of the friction disc, and when braking is relieved, the steel disc spring pushes the friction disc to separate from the brake disc, so that the friction disc is actively returned. However, the above-described scheme has the following problems:

the friction plate is unbalanced in stress, and the friction plate tends to incline in the caliper, so that the friction plate cannot be completely separated from the brake disc, and the problem of offset wear of the friction plate can occur for a long time;

along with the normal wearing and tearing of friction disc and brake disc, the friction disc leads to pushing the starting force grow of friction disc to the compression grow of return mechanism spring, can influence whole brake caliper's starting pressure.

Disclosure of Invention

The embodiment of the invention provides a caliper brake friction plate return mechanism, a caliper brake and an automobile, and aims to solve the technical problems that in the related technology, the friction plate is unbalanced in stress in the return process and unstable.

In a first aspect, a caliper brake friction disc return mechanism is provided, comprising:

at least one friction disc return assembly of locating between two calliper covers, every friction disc return assembly all includes:

two ends of the guide shaft are connected with the caliper cover;

the two elastic reset discs are symmetrically sleeved on the guide shaft, and one surface of each elastic reset disc is attached to a corresponding friction plate; and

when the caliper brake brakes, each friction plate is close to the brake disc and drives the corresponding elastic reset disc to deform; when the caliper brake releases braking, the elastic reset disc deforms and resets and drives the corresponding friction plate to be separated from the brake disc and then reset.

Because each friction disc return assembly all includes: the elastic reset plate is symmetrically sleeved on the guide shaft, and one surface of the elastic reset plate is used for being attached to a corresponding friction plate. When the caliper brake brakes, each friction plate is close to the brake disc and drives the corresponding elastic reset disc to deform; when the caliper brake releases braking, the elastic reset disc deforms and resets and drives the corresponding friction plate to be separated from the brake disc and then reset, surface contact is adopted to transfer restoring force, the stress is balanced in the process of resetting the friction plate, and stability is good.

In some embodiments, each of the elastic reset plates includes:

the deformable disc is tightly sleeved on the guide shaft;

the hard disc is sleeved on the periphery of the deformable disc, the hard disc is attached to a corresponding friction plate, and when the friction plate is close to the brake disc, the friction plate drives the hard disc and deforms the deformable disc.

In some embodiments, the hard disc is provided with an annular groove, the deformable disc is embedded in the annular groove, and a chamfer with a preset size is formed on one side of the annular groove, which is close to the corresponding friction plate.

In some embodiments, the deformable disc is made of rubber and the rigid disc is made of a rigid metal.

In some embodiments, each caliper housing is formed with a piston cavity having a piston disposed therein for driving one of the friction pads toward the brake disc.

In some embodiments, a flexible plate is disposed on a side of each friction plate adjacent to the corresponding piston.

In some embodiments, a guide shaft sleeve is arranged at one end of the guide shaft.

In some embodiments, two friction plate return assemblies are arranged between two caliper covers, and the two friction plate return assemblies are symmetrical along the vertical axial section of the wheel.

In a second aspect, there is provided a caliper brake comprising the aforementioned caliper brake pad return mechanism.

In a third aspect, an automobile is provided, comprising the caliper brake as described above.

The technical scheme provided by the invention has the beneficial effects that:

the embodiment of the invention provides a caliper brake friction plate return mechanism, a caliper brake and an automobile, wherein the caliper brake friction plate return mechanism is provided with at least one friction plate return assembly, and each friction plate return assembly comprises: the elastic reset plate is symmetrically sleeved on the guide shaft, and one surface of the elastic reset plate is used for being attached to a corresponding friction plate. When the caliper brake brakes, each friction plate is close to the brake disc and drives the corresponding elastic reset disc to deform; when the caliper brake releases braking, the elastic reset disc deforms and resets and drives the corresponding friction plate to be separated from the brake disc and then reset, surface contact is adopted to transfer restoring force, the stress is balanced in the process of resetting the friction plate, and stability is good.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a friction plate return mechanism of a caliper brake according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1 provided in accordance with an embodiment of the present invention;

FIG. 3 is an enlarged partial schematic view of FIG. 1 according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an elastic reset plate according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an elastic reset plate according to an embodiment of the present invention;

in the figure: 1. a friction plate return assembly; 11. a guide shaft; 12. an elastic reset plate; 121. a deformable disc; 122. a hard disk; 1221. an annular groove; 1222. chamfering; 13. a guide shaft sleeve; 2. a caliper housing; 21. a piston cavity; 22. a piston; 3. a friction plate; 4. a brake disc; 5. a flexible sheet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the prior art, a steel disc spring is generally adopted to provide a force for a friction disc to separate from a brake disc, the force bearing point is arranged at the upper end of a back plate of the friction disc, and when braking is relieved, the steel disc spring pushes the friction disc to separate from the brake disc, so that the friction disc is actively returned. However, the above-described scheme has the following problems:

the friction plate is unbalanced in stress, and the friction plate tends to incline in the caliper, so that the friction plate cannot be completely separated from the brake disc, and the problem of offset wear of the friction plate can occur for a long time;

along with the normal wearing and tearing of friction disc and brake disc, the friction disc leads to pushing the starting force grow of friction disc to the compression grow of return mechanism spring, can influence whole brake caliper's starting pressure.

The embodiment of the invention provides a return mechanism of a friction plate of a caliper brake, which can solve the technical problems of unbalanced stress and unstable friction plate in the return process of the friction plate in the prior art.

Referring to fig. 1 and 2, an embodiment of the present invention provides a caliper brake friction plate return mechanism, including: at least one friction disc return assembly 1 of locating between two calliper covers 2, every friction disc return assembly 1 all includes: a guide shaft 11 and two elastic reset disks 12.

Two ends of the guide shaft 11 are connected with the caliper cover 2, the elastic reset discs 12 are symmetrically sleeved on the guide shaft 11, and each elastic reset disc 12 is used for being attached to a corresponding friction plate 3. When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives a corresponding elastic reset disc 12 to deform; when the caliper brake is released, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 to be separated from the brake disc 4 and then reset.

The caliper brake friction plate return mechanism in the embodiment of the invention is provided with at least one friction plate return assembly 1, and each friction plate return assembly 1 comprises: the elastic reset plate comprises a guide shaft 11 and two elastic reset plates 12, wherein the elastic reset plates 12 are symmetrically sleeved on the guide shaft 11, and each elastic reset plate 12 is used for being attached to a corresponding friction plate 3. When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives a corresponding elastic reset disc 12 to deform; when the caliper brake is released from braking, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 to be separated from the brake disc 4 and then reset, surface contact is adopted to transfer restoring force, the stress is balanced in the process of resetting the friction plate, and the stability is good.

Further, in one embodiment, referring to fig. 3, each of the elastic reset plates 12 includes: a deformable disc 121 and a rigid disc 122.

The deformable disc 121 is tightly sleeved on the guide shaft 11, the hard disc 122 is sleeved on the periphery of the deformable disc 121, the hard disc 122 is attached to a corresponding friction plate 3, and when the friction plate 3 is close to the brake disc 4, the friction plate 3 drives the hard disc 122 and deforms the deformable disc 121. The elastic reset plate 12 has a simple structure and is convenient to mount and dismount.

Further, in one embodiment, referring to fig. 1 and 4, the hard plate 122 is provided with an annular groove 1221, the deformable plate 121 is embedded in the annular groove 1221, and a chamfer 1222 with a predetermined size is formed on one side of the annular groove 1221 adjacent to the corresponding one of the friction plates 3.

The chamfer 1222 with a preset size can control the maximum deformation of the deformable disc 121, and when the friction plate 3 and the brake disc 4 are worn, the displacement of the friction plate 3 driving the hard disc 122 to move is larger than the maximum deformation of the deformable disc 121. Referring to fig. 1, assuming that the friction plate 3 and the brake disc 4 are worn out greatly, the displacement of the left friction plate 3 driving the hard disc 122 to move may be greater than the maximum deformation of the deformable disc 121, at this time, the deformable disc 121 will be driven to slide along the guide shaft 11 by a certain amount, and the deformable disc 121 will be tightly sleeved on the new position of the guide shaft 11, so that the return force and the return gap provided by the deformable disc 121 to the friction plate 3 are not changed, so that the starting force for pushing the friction plate 3 will not be increased, and the starting pressure of the whole brake caliper will not be affected.

Further, in one embodiment, the deformable disc 121 is made of rubber and the hard disc 122 is made of hard metal. Preferably, the deformable disc 121 is made of EPDM (ethylene Propylene Diene monomer), which is a terpolymer of ethylene, Propylene and non-conjugated Diene, and the EPDM has the most important characteristics of excellent oxidation resistance, ozone resistance and erosion resistance, has the lowest specific gravity, can absorb a large amount of filler and oil without greatly affecting the characteristics, and can be made of a rubber compound with low cost. Preferably, the hard disc 122 is made of 45 steel, and the 45 steel is medium carbon structural steel, and has good cold and hot workability, good mechanical properties, low price and wide application.

Further, in one embodiment, referring to fig. 1, each caliper housing 2 is formed with a piston cavity 21, and a piston 22 is provided in the piston cavity 21, and the piston 22 is used for driving each friction plate 3 to approach the brake disc 4.

Furthermore, in one embodiment, referring to fig. 1, a flexible sheet 5 is disposed on a surface of each friction plate 3 close to the corresponding piston, and the flexible sheet 5 can play a role in damping and silencing.

Furthermore, in one embodiment, referring to fig. 1 and 5, a guide shaft sleeve 13 is disposed at one end of the guide shaft 11, and the guide shaft sleeve 13 facilitates the radial positioning and installation of the guide shaft 11.

Furthermore, in one embodiment, referring to fig. 1, two friction plate returning assemblies 1 are arranged between two caliper covers 2, and the two friction plate returning assemblies 1 are symmetrical along a vertical axial section of the wheel, so that the friction plates 3 are stressed more evenly and have better stability in the returning process.

The embodiment of the invention also provides a caliper brake, which comprises the caliper brake friction plate return mechanism. Friction disc return mechanism includes: at least one friction disc return assembly 1 of locating between two calliper covers 2, every friction disc return assembly 1 all includes: a guide shaft 11 and two elastic reset disks 12.

Two ends of the guide shaft 11 are connected with the caliper cover 2, the elastic reset discs 12 are symmetrically sleeved on the guide shaft 11, and each elastic reset disc 12 is used for being attached to a corresponding friction plate 3. When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives a corresponding elastic reset disc 12 to deform; when the caliper brake is released, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 to be separated from the brake disc 4 and then reset.

The caliper brake friction plate return mechanism in the embodiment of the invention is provided with at least one friction plate return assembly 1, and each friction plate return assembly 1 comprises: the elastic reset plate comprises a guide shaft 11 and two elastic reset plates 12, wherein the elastic reset plates 12 are symmetrically sleeved on the guide shaft 11, and each elastic reset plate 12 is used for being attached to a corresponding friction plate 3. When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives a corresponding elastic reset disc 12 to deform; when the caliper brake is released from braking, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 to be separated from the brake disc 4 and then reset, surface contact is adopted to transfer restoring force, the stress is balanced in the process of resetting the friction plate, and the stability is good.

Further, in one embodiment, referring to fig. 3, each of the elastic reset plates 12 includes: a deformable disc 121 and a rigid disc 122.

The deformable disc 121 is tightly sleeved on the guide shaft 11, the hard disc 122 is sleeved on the periphery of the deformable disc 121, the hard disc 122 is attached to a corresponding friction plate 3, and when the friction plate 3 is close to the brake disc 4, the friction plate 3 drives the hard disc 122 and deforms the deformable disc 121. The elastic reset plate 12 has a simple structure and is convenient to mount and dismount.

Further, in one embodiment, referring to fig. 1 and 4, the hard plate 122 is provided with an annular groove 1221, the deformable plate 121 is embedded in the annular groove 1221, and a chamfer 1222 with a predetermined size is formed on one side of the annular groove 1221 adjacent to the corresponding one of the friction plates 3.

The chamfer 1222 with a preset size can control the maximum deformation of the deformable disc 121, and when the friction plate 3 and the brake disc 4 are worn, the displacement of the friction plate 3 driving the hard disc 122 to move is larger than the maximum deformation of the deformable disc 121. Referring to fig. 1, assuming that the friction plate 3 and the brake disc 4 are worn out greatly, the displacement of the left friction plate 3 driving the hard disc 122 to move may be greater than the maximum deformation of the deformable disc 121, at this time, the deformable disc 121 will be driven to slide along the guide shaft 11 by a certain amount, and the deformable disc 121 will be tightly sleeved on the new position of the guide shaft 11, so that the return force and the return gap provided by the deformable disc 121 to the friction plate 3 are not changed, so that the starting force for pushing the friction plate 3 will not be increased, and the starting pressure of the whole brake caliper will not be affected.

Further, in one embodiment, the deformable disc 121 is made of rubber and the hard disc 122 is made of hard metal. Preferably, the deformable disc 121 is made of EPDM (ethylene Propylene Diene monomer), which is a terpolymer of ethylene, Propylene and non-conjugated Diene, and the EPDM has the most important characteristics of excellent oxidation resistance, ozone resistance and erosion resistance, has the lowest specific gravity, can absorb a large amount of filler and oil without greatly affecting the characteristics, and can be made of a rubber compound with low cost. Preferably, the hard disc 122 is made of 45 steel, and the 45 steel is medium carbon structural steel, and has good cold and hot workability, good mechanical properties, low price and wide application.

Further, in one embodiment, referring to fig. 1, each caliper housing 2 is formed with a piston cavity 21, and a piston 22 is provided in the piston cavity 21, and the piston 22 is used for driving each friction plate 3 to approach the brake disc 4.

Furthermore, in one embodiment, referring to fig. 1, a flexible sheet 5 is disposed on a surface of each friction plate 3 close to the corresponding piston, and the flexible sheet 5 can play a role in damping and silencing.

Furthermore, in one embodiment, referring to fig. 1 and 5, a guide shaft sleeve 13 is disposed at one end of the guide shaft 11, and the guide shaft sleeve 13 facilitates the radial positioning and installation of the guide shaft 11.

Furthermore, in one embodiment, referring to fig. 1, two friction plate returning assemblies 1 are arranged between two caliper covers 2, and the two friction plate returning assemblies 1 are symmetrical along a vertical axial section of the wheel, so that the friction plates 3 are stressed more evenly and have better stability in the returning process.

The embodiment of the invention also provides an automobile which comprises the caliper brake, wherein the caliper brake comprises the caliper brake friction plate return mechanism. Friction disc return mechanism includes: at least one friction disc return assembly 1 of locating between two calliper covers 2, every friction disc return assembly 1 all includes: a guide shaft 11 and two elastic reset disks 12.

Two ends of the guide shaft 11 are connected with the caliper cover 2, the elastic reset discs 12 are symmetrically sleeved on the guide shaft 11, and each elastic reset disc 12 is used for being attached to a corresponding friction plate 3. When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives a corresponding elastic reset disc 12 to deform; when the caliper brake is released, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 to be separated from the brake disc 4 and then reset.

The caliper brake friction plate return mechanism in the embodiment of the invention is provided with at least one friction plate return assembly 1, and each friction plate return assembly 1 comprises: the elastic reset plate comprises a guide shaft 11 and two elastic reset plates 12, wherein the elastic reset plates 12 are symmetrically sleeved on the guide shaft 11, and each elastic reset plate 12 is used for being attached to a corresponding friction plate 3. When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives a corresponding elastic reset disc 12 to deform; when the caliper brake is released from braking, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 to be separated from the brake disc 4 and then reset, surface contact is adopted to transfer restoring force, the stress is balanced in the process of resetting the friction plate, and the stability is good.

Further, in one embodiment, referring to fig. 3, each of the elastic reset plates 12 includes: a deformable disc 121 and a rigid disc 122.

The deformable disc 121 is tightly sleeved on the guide shaft 11, the hard disc 122 is sleeved on the periphery of the deformable disc 121, the hard disc 122 is attached to a corresponding friction plate 3, and when the friction plate 3 is close to the brake disc 4, the friction plate 3 drives the hard disc 122 and deforms the deformable disc 121. The elastic reset plate 12 has a simple structure and is convenient to mount and dismount.

Further, in one embodiment, referring to fig. 1 and 4, the hard plate 122 is provided with an annular groove 1221, the deformable plate 121 is embedded in the annular groove 1221, and a chamfer 1222 with a predetermined size is formed on one side of the annular groove 1221 adjacent to the corresponding one of the friction plates 3.

The chamfer 1222 with a preset size can control the maximum deformation of the deformable disc 121, and when the friction plate 3 and the brake disc 4 are worn, the displacement of the friction plate 3 driving the hard disc 122 to move is larger than the maximum deformation of the deformable disc 121. Referring to fig. 1, assuming that the friction plate 3 and the brake disc 4 are worn out greatly, the displacement of the left friction plate 3 driving the hard disc 122 to move may be greater than the maximum deformation of the deformable disc 121, at this time, the deformable disc 121 will be driven to slide along the guide shaft 11 by a certain amount, and the deformable disc 121 will be tightly sleeved on the new position of the guide shaft 11, so that the return force and the return gap provided by the deformable disc 121 to the friction plate 3 are not changed, so that the starting force for pushing the friction plate 3 will not be increased, and the starting pressure of the whole brake caliper will not be affected.

Further, in one embodiment, the deformable disc 121 is made of rubber and the hard disc 122 is made of hard metal. Preferably, the deformable disc 121 is made of EPDM (ethylene Propylene Diene monomer), which is a terpolymer of ethylene, Propylene and non-conjugated Diene, and the EPDM has the most important characteristics of excellent oxidation resistance, ozone resistance and erosion resistance, has the lowest specific gravity, can absorb a large amount of filler and oil without greatly affecting the characteristics, and can be made of a rubber compound with low cost. Preferably, the hard disc 122 is made of 45 steel, and the 45 steel is medium carbon structural steel, and has good cold and hot workability, good mechanical properties, low price and wide application.

Further, in one embodiment, referring to fig. 1, each caliper housing 2 is formed with a piston cavity 21, and a piston 22 is provided in the piston cavity 21, and the piston 22 is used for driving each friction plate 3 to approach the brake disc 4.

Furthermore, in one embodiment, referring to fig. 1, a flexible sheet 5 is disposed on a surface of each friction plate 3 close to the corresponding piston, and the flexible sheet 5 can play a role in damping and silencing.

Furthermore, in one embodiment, referring to fig. 1 and 5, a guide shaft sleeve 13 is disposed at one end of the guide shaft 11, and the guide shaft sleeve 13 facilitates the radial positioning and installation of the guide shaft 11.

Furthermore, in one embodiment, referring to fig. 1, two friction plate returning assemblies 1 are arranged between two caliper covers 2, and the two friction plate returning assemblies 1 are symmetrical along a vertical axial section of the wheel, so that the friction plates 3 are stressed more evenly and have better stability in the returning process.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.