CN113738795B - Caliper brake friction disc return mechanism, caliper brake and automobile - Google Patents

Abstract

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. The friction plate return mechanism includes: at least one friction plate return assembly arranged between two caliper covers, each of the friction plate return components includes: a guide shaft and two elastic reset discs, the two ends of the guide shaft are connected to the caliper cover; Close to the brake disc and drive the corresponding one of the elastic reset discs to deform; when the caliper brake is released, the elastic reset disc deforms and resets and drives the corresponding friction plate to disengage from the brake disc and return to its position. When the elastic reset disc of the present invention deforms and resets and drives the corresponding friction plate and the brake disc to return to their original positions, surface contact is adopted, so that the force of the friction plates is balanced during the return process, and the stability is good.

Description

Caliper brake friction disc return mechanism, caliper brake and automobile

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 technique

As people's requirements for energy saving and environmental protection are getting higher and higher, it is becoming 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 mileage. A large part of the driving resistance of the vehicle comes from the dragging force of the brakes. A brake is a device that has the functions of decelerating, stopping or maintaining a stopped state of a moving part (or a moving machine), and is a mechanical part that stops or slows down a moving part in a machine. Commonly known as brakes, brakes. The brake is mainly composed of frame, brake parts and operating device. Some brakes are also equipped with an automatic adjustment device for the clearance of the brake parts.

Caliper brakes are a type of brake commonly used in vehicles. During the braking process of the whole vehicle, the brake converts the brake hydraulic pressure into the pressure of the friction plate pressed on the brake disc to generate friction force, thereby generating braking torque to slow down or stop the vehicle. However, when the brake is released, the friction plate cannot actively disengage from the brake disc, so that the friction plate and the brake disc can still rub against each other to generate drag when the vehicle is running, which will lead to an increase in energy consumption of the vehicle.

In the prior art, steel plate springs are usually used to give the friction plate a force to break away from the brake disc. The force point is at the upper end of the back plate of the friction plate. When the brake is released, the steel plate spring pushes the friction plate away from the brake disc to realize the active return of the friction plate. But the above scheme has the following problems:

The force on the friction plate is unbalanced, and the friction plate has a tendency to tilt in the caliper, which will cause the friction plate to not be completely separated from the brake disc, and the problem of offset wear of the friction plate will occur for a long time;

With the normal wear of the friction plate and the brake disc, the compression of the friction plate to the spring of the return mechanism becomes larger, resulting in a larger starting force to push the friction plate, which will affect the starting pressure of the entire brake caliper.

Contents of the invention

Embodiments of the present invention provide a caliper brake friction plate return mechanism, a caliper brake and an automobile to solve the technical problems of unbalanced forces and unstable friction plates in the process of returning the friction plate in the related art.

In the first aspect, a caliper brake friction plate return mechanism is provided, including:

At least one friction plate return assembly arranged between two caliper covers, each of the friction plate return assemblies includes:

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

Two elastic reset disks are symmetrically sleeved on the guide shaft, and one side of each elastic reset disk is attached to a corresponding friction plate; and

When the caliper brake brakes, each friction plate approaches the brake disc and drives a corresponding elastic return disc to deform; when the caliper brake is released, the elastic return disc deforms and resets and drives the corresponding friction plate to disengage from the brake disc and return to its original position.

Since each friction disc return assembly includes: a guide shaft and two elastic reset discs, the two elastic reset discs are symmetrically sheathed on the guide shaft, and one side of each elastic reset disc is used to fit a corresponding friction disc. When the caliper brake brakes, each friction plate is close to the brake disc and drives the corresponding one of the elastic reset discs to deform; when the caliper brake is released, the elastic reset disc deforms and resets and drives the corresponding friction plate to separate from the brake disc and return to its original position. Surface contact is used to transmit the restoring force, and the friction plates are balanced in force during the return process and have good stability.

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

a deformable disc, the deformable disc is tightly sleeved on the guide shaft;

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

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

In some embodiments, the deformable disk is made of rubber, and the hard disk is made of hard metal.

In some embodiments, each caliper cover is formed with a piston cavity, and a piston is disposed in the piston cavity, and the piston is used to drive a friction plate close to the brake disc.

In some embodiments, each friction plate is provided with a flexible plate on a side close to the corresponding piston.

In some embodiments, one end of the guide shaft is provided with a guide sleeve.

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

In a second aspect, a caliper brake is provided, including the aforementioned caliper brake friction disc return mechanism.

In a third aspect, an automobile is provided, including the aforementioned caliper brake.

The beneficial effects brought by the technical solution provided by the invention include:

An embodiment of the present invention provides a caliper brake friction plate return mechanism, a caliper brake and an automobile. The caliper brake friction plate return mechanism is provided with at least one friction plate return assembly. Each of the friction plate return assemblies includes: a guide shaft and two elastic reset disks. The two elastic reset disks are symmetrically sleeved on the guide shaft. One side of each elastic reset disk is used to fit a corresponding friction plate. When the caliper brake brakes, each friction plate is close to the brake disc and drives the corresponding one of the elastic reset discs to deform; when the caliper brake is released, the elastic reset disc deforms and resets and drives the corresponding friction plate to separate from the brake disc and return to its original position. Surface contact is used to transmit the restoring force, and the friction plates are balanced in force during the return process and have good stability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work.

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

Fig. 2 is the top view of Fig. 1 provided by the embodiment of the present invention;

FIG. 3 is a partially enlarged schematic diagram of FIG. 1 provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of an elastic reset disc provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of an elastic reset disc provided by an embodiment of the present invention;

In the figure: 1, friction disc return assembly; 11, guide shaft; 12, elastic reset disc; 121, deformable disc; 122, hard disc; 1221, annular groove; 1222, chamfering;

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the prior art, steel plate springs are usually used to give the friction plate a force to break away from the brake disc. The force point is at the upper end of the back plate of the friction plate. When the brake is released, the steel plate spring pushes the friction plate away from the brake disc to realize the active return of the friction plate. But the above scheme has the following problems:

The force on the friction plate is unbalanced, and the friction plate has a tendency to tilt in the caliper, which will cause the friction plate to not be completely separated from the brake disc, and the problem of offset wear of the friction plate will occur for a long time;

With the normal wear of the friction plate and the brake disc, the compression of the friction plate to the spring of the return mechanism becomes larger, resulting in a larger starting force to push the friction plate, which will affect the starting pressure of the entire brake caliper.

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

1 and 2, the embodiment of the present invention provides a caliper brake friction plate return mechanism, the friction plate return mechanism includes: at least one friction plate return assembly 1 arranged between two caliper covers 2, each of the friction plate return assemblies 1 includes: a guide shaft 11 and two elastic return disks 12.

Both ends of the guide shaft 11 are connected to the caliper cover 2 , and two elastic reset discs 12 are symmetrically sleeved on the guide shaft 11 , and one side of each elastic reset disc 12 is used to fit a corresponding friction plate 3 . When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives the corresponding one of the elastic reset discs 12 to deform;

The friction plate return mechanism of the caliper brake in the embodiment of the present invention is provided with at least one friction plate return assembly 1, and each of the friction plate return assemblies 1 includes: a guide shaft 11 and two elastic reset discs 12, the two elastic reset discs 12 are symmetrically sleeved on the guide shaft 11, and one side of each elastic reset disc 12 is used to fit a corresponding friction plate 3. 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 is released, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 and brake disc 4 to return after disengagement, and the surface contact is used to transmit the restoring force.

Furthermore, in one embodiment, as shown in FIG. 3 , each elastic reset disk 12 includes: a deformable disk 121 and a hard disk 122 .

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

Furthermore, in one embodiment, as shown in FIG. 1 and FIG. 4 , the hard disk 122 is provided with an annular groove 1221 , the deformable disk 121 is embedded in the annular groove 1221 , and a chamfer 1222 of a predetermined size is formed on the side of the annular groove 1221 close to a corresponding friction plate 3 .

The chamfer 1222 with a preset size can control the maximum deformation of the deformable disc 121 , when the friction disc 3 and the brake disc 4 are worn, the displacement of the hard disc 122 driven by the friction disc 3 will be greater than the maximum deformation of the deformable disc 121 . Referring to Fig. 1, assuming that the friction disc 3 and the brake disc 4 are greatly worn, the displacement of the hard disc 122 driven by the left friction disc 3 may be greater than the maximum deformation of the deformable disc 121. At this time, the deformable disc 121 will be driven to slide a certain amount along the guide shaft 11, and the deformable disc 121 will be tightly nested in the new position of the guide shaft 11, thereby ensuring that the return force and the return gap provided by the deformable disc 121 to the friction disc 3 remain unchanged, so that the starting force of the friction disc 3 is pushed. It does not get bigger and does not affect the starting pressure of the entire brake caliper.

Furthermore, in one embodiment, the deformable disk 121 is made of rubber, and the hard disk 122 is made of hard metal. Preferably, the material of the deformable disk 121 is EPDM (Ethylene Propylene Diene Monomer). EPDM is a terpolymer of ethylene, propylene and non-conjugated diene. The main characteristic of EPDM is its superior resistance to oxidation, ozone and erosion. EPDM has the lowest specific gravity, can absorb a large amount of fillers and oils and has little effect on the properties, and can produce low-cost rubber compounds. Preferably, the hard disc 122 is made of No. 45 steel, which is a medium-carbon structural steel with good cold and hot workability, good mechanical properties, low price, and wide application.

Furthermore, in one embodiment, as shown in FIG. 1 , each caliper cover 2 is formed with a piston cavity 21 , and a piston 22 is disposed in the piston cavity 21 , and the piston 22 is used to drive each friction plate 3 close to the brake disc 4 .

Furthermore, in one embodiment, as shown in FIG. 1 , each friction plate 3 is provided with a flexible plate 5 on a side close to the corresponding piston, and the flexible plate 5 can play a role of shock absorption and noise reduction.

Furthermore, in one embodiment, as shown in FIG. 1 and FIG. 5 , one end of the guide shaft 11 is provided with a guide sleeve 13 , and the guide sleeve 13 facilitates radial positioning and installation of the guide shaft 11 .

Furthermore, in one embodiment, as shown in FIG. 1, two friction plate return assemblies 1 are arranged between two caliper covers 2, and the two friction plate return assemblies 1 are symmetrical along the vertical axial section of the wheel, so that the force of the friction plate 3 during the return process is more balanced and the stability is better.

An embodiment of the present invention also provides a caliper brake, including the aforementioned mechanism for returning the friction plate of the caliper brake. The friction plate return mechanism includes: at least one friction plate return assembly 1 arranged between two caliper covers 2 , and each friction plate return assembly 1 includes: a guide shaft 11 and two elastic return disks 12 .

Both ends of the guide shaft 11 are connected to the caliper cover 2 , and two elastic reset discs 12 are symmetrically sleeved on the guide shaft 11 , and one side of each elastic reset disc 12 is used to fit a corresponding friction plate 3 . When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives the corresponding one of the elastic reset discs 12 to deform;

The friction plate return mechanism of the caliper brake in the embodiment of the present invention is provided with at least one friction plate return assembly 1, and each of the friction plate return assemblies 1 includes: a guide shaft 11 and two elastic reset discs 12, the two elastic reset discs 12 are symmetrically sleeved on the guide shaft 11, and one side of each elastic reset disc 12 is used to fit a corresponding friction plate 3. 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 is released, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 and brake disc 4 to return after disengagement, and the surface contact is used to transmit the restoring force.

Furthermore, in one embodiment, as shown in FIG. 3 , each elastic reset disk 12 includes: a deformable disk 121 and a hard disk 122 .

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

Furthermore, in one embodiment, as shown in FIG. 1 and FIG. 4 , the hard disk 122 is provided with an annular groove 1221 , the deformable disk 121 is embedded in the annular groove 1221 , and a chamfer 1222 of a predetermined size is formed on the side of the annular groove 1221 close to a corresponding friction plate 3 .

The chamfer 1222 with a preset size can control the maximum deformation of the deformable disc 121 , when the friction disc 3 and the brake disc 4 are worn, the displacement of the hard disc 122 driven by the friction disc 3 will be greater than the maximum deformation of the deformable disc 121 . Referring to Fig. 1, assuming that the friction disc 3 and the brake disc 4 are greatly worn, the displacement of the hard disc 122 driven by the left friction disc 3 may be greater than the maximum deformation of the deformable disc 121. At this time, the deformable disc 121 will be driven to slide a certain amount along the guide shaft 11, and the deformable disc 121 will be tightly nested in the new position of the guide shaft 11, thereby ensuring that the return force and the return gap provided by the deformable disc 121 to the friction disc 3 remain unchanged, so that the starting force of the friction disc 3 is pushed. It does not get bigger and does not affect the starting pressure of the entire brake caliper.

Furthermore, in one embodiment, the deformable disk 121 is made of rubber, and the hard disk 122 is made of hard metal. Preferably, the material of the deformable disk 121 is EPDM (Ethylene Propylene Diene Monomer). EPDM is a terpolymer of ethylene, propylene and non-conjugated diene. The main characteristic of EPDM is its superior resistance to oxidation, ozone and erosion. EPDM has the lowest specific gravity, can absorb a large amount of fillers and oils and has little effect on the properties, and can produce low-cost rubber compounds. Preferably, the hard disc 122 is made of No. 45 steel, which is a medium-carbon structural steel with good cold and hot workability, good mechanical properties, low price, and wide application.

Furthermore, in one embodiment, as shown in FIG. 1 , each caliper cover 2 is formed with a piston cavity 21 , and a piston 22 is disposed in the piston cavity 21 , and the piston 22 is used to drive each friction plate 3 close to the brake disc 4 .

Furthermore, in one embodiment, as shown in FIG. 1 , each friction plate 3 is provided with a flexible plate 5 on a side close to the corresponding piston, and the flexible plate 5 can play a role of shock absorption and noise reduction.

Furthermore, in one embodiment, as shown in FIG. 1 and FIG. 5 , one end of the guide shaft 11 is provided with a guide sleeve 13 , and the guide sleeve 13 facilitates radial positioning and installation of the guide shaft 11 .

Furthermore, in one embodiment, as shown in FIG. 1, two friction plate return assemblies 1 are arranged between two caliper covers 2, and the two friction plate return assemblies 1 are symmetrical along the vertical axial section of the wheel, so that the force of the friction plate 3 during the return process is more balanced and the stability is better.

An embodiment of the present invention also provides an automobile, including the aforementioned caliper brake, and the caliper brake includes the aforementioned caliper brake friction plate return mechanism. The friction plate return mechanism includes: at least one friction plate return assembly 1 arranged between two caliper covers 2 , and each friction plate return assembly 1 includes: a guide shaft 11 and two elastic return disks 12 .

Both ends of the guide shaft 11 are connected to the caliper cover 2 , and two elastic reset discs 12 are symmetrically sleeved on the guide shaft 11 , and one side of each elastic reset disc 12 is used to fit a corresponding friction plate 3 . When the caliper brake brakes, each friction plate 3 is close to the brake disc 4 and drives the corresponding one of the elastic reset discs 12 to deform;

The friction plate return mechanism of the caliper brake in the embodiment of the present invention is provided with at least one friction plate return assembly 1, and each of the friction plate return assemblies 1 includes: a guide shaft 11 and two elastic reset discs 12, the two elastic reset discs 12 are symmetrically sleeved on the guide shaft 11, and one side of each elastic reset disc 12 is used to fit a corresponding friction plate 3. 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 is released, the elastic reset disc 12 deforms and resets and drives the corresponding friction plate 3 and brake disc 4 to return after disengagement, and the surface contact is used to transmit the restoring force.

Furthermore, in one embodiment, as shown in FIG. 3 , each elastic reset disk 12 includes: a deformable disk 121 and a hard disk 122 .

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

Furthermore, in one embodiment, as shown in FIG. 1 and FIG. 4 , the hard disk 122 is provided with an annular groove 1221 , the deformable disk 121 is embedded in the annular groove 1221 , and a chamfer 1222 of a predetermined size is formed on the side of the annular groove 1221 close to a corresponding friction plate 3 .

The chamfer 1222 with a preset size can control the maximum deformation of the deformable disc 121 , when the friction disc 3 and the brake disc 4 are worn, the displacement of the hard disc 122 driven by the friction disc 3 will be greater than the maximum deformation of the deformable disc 121 . Referring to Fig. 1, assuming that the friction disc 3 and the brake disc 4 are greatly worn, the displacement of the hard disc 122 driven by the left friction disc 3 may be greater than the maximum deformation of the deformable disc 121. At this time, the deformable disc 121 will be driven to slide a certain amount along the guide shaft 11, and the deformable disc 121 will be tightly nested in the new position of the guide shaft 11, thereby ensuring that the return force and the return gap provided by the deformable disc 121 to the friction disc 3 remain unchanged, so that the starting force of the friction disc 3 is pushed. It does not get bigger and does not affect the starting pressure of the entire brake caliper.

Furthermore, in one embodiment, the deformable disk 121 is made of rubber, and the hard disk 122 is made of hard metal. Preferably, the material of the deformable disk 121 is EPDM (Ethylene Propylene Diene Monomer). EPDM is a terpolymer of ethylene, propylene and non-conjugated diene. The main characteristic of EPDM is its superior resistance to oxidation, ozone and erosion. EPDM has the lowest specific gravity, can absorb a large amount of fillers and oils and has little effect on the properties, and can produce low-cost rubber compounds. Preferably, the hard disc 122 is made of No. 45 steel, which is a medium-carbon structural steel with good cold and hot workability, good mechanical properties, low price, and wide application.

Furthermore, in one embodiment, as shown in FIG. 1 , each caliper cover 2 is formed with a piston cavity 21 , and a piston 22 is disposed in the piston cavity 21 , and the piston 22 is used to drive each friction plate 3 close to the brake disc 4 .

Furthermore, in one embodiment, as shown in FIG. 1 , each friction plate 3 is provided with a flexible plate 5 on a side close to the corresponding piston, and the flexible plate 5 can play a role of shock absorption and noise reduction.

Furthermore, in one embodiment, as shown in FIG. 1 and FIG. 5 , one end of the guide shaft 11 is provided with a guide sleeve 13 , and the guide sleeve 13 facilitates radial positioning and installation of the guide shaft 11 .

Furthermore, in one embodiment, as shown in FIG. 1, two friction plate return assemblies 1 are arranged between two caliper covers 2, and the two friction plate return assemblies 1 are symmetrical along the vertical axial section of the wheel, so that the force of the friction plate 3 during the return process is more balanced and the stability is better.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the present invention. Unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be an internal connection between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

It should be noted that in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements but also other elements not expressly listed or which are inherent to such process, method, article or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention will not be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims (5)

1. A caliper brake friction plate return mechanism comprising:

at least one friction plate return assembly (1) arranged between two caliper covers (2), each friction plate return assembly (1) comprises:

the two ends of the guide shaft (11) are fixedly connected with the caliper cover (2);

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) approaches the brake disc (4) and drives a corresponding elastic reset disc (12) to deform; when the caliper brake releases the brake, the elastic reset disc (12) deforms and resets and drives the corresponding friction plate (3) to separate from the brake disc (4) and then returns;

each of said resilient return discs (12) comprises:

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

a hard disc (122), wherein the hard disc (122) is sleeved on the periphery of the deformable disc (121), the hard disc (122) is attached with a corresponding friction plate (3), and when the friction plate (3) approaches to the brake disc (4), the friction plate (3) drives the hard disc (122) and deforms the deformable disc (121);

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 angle (1222) with a preset size is formed on one side, close to a corresponding friction plate (3), of the annular groove (1221);

each caliper cover (2) is formed by a piston cavity (21), a piston (22) is arranged in the piston cavity (21), the piston (22) is used for driving each friction plate (3) to be close to a brake disc (4), and one surface of each friction plate (3) close to the corresponding piston (22) is provided with a flexible plate (5);

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

2. The caliper brake pad return mechanism of claim 1 wherein:

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

3. The caliper brake pad return mechanism of claim 1 wherein:

two friction plate return assemblies (1) are arranged between the two caliper covers (2), and the two friction plate return assemblies (1) are symmetrical along the vertical axial section of the wheel.

4. A caliper brake comprising a caliper brake pad return mechanism as claimed in any one of claims 1 to 3.

5. An automobile comprising a caliper brake as defined in claim 4.