Three-cylinder linkage caliper with anti-lock function

Abstract

The utility model relates to a three-cylinder linkage belt antilock caliper, which comprises a caliper body, an upper brake shoe block, a lower brake shoe block and two groups of friction plates, the upper brake shoe block is linked with a piston assembly, the piston assembly comprises a main piston mechanism distributed in the middle of the upper brake shoe block, two groups of auxiliary piston mechanisms are arranged on two sides of the main piston mechanism respectively, and the auxiliary piston mechanisms are arranged on two sides of the main piston mechanism respectively. One group of auxiliary piston mechanism is linked with the left end part of the upper brake shoe, the other group of auxiliary piston mechanism is linked with the right end part of the upper brake shoe, the main piston mechanism and the auxiliary piston mechanism respectively comprise a piston cylinder and a piston, and the piston cylinder is provided with an oil inlet; and the lower brake shoe block is fixedly mounted on one side of the jaw. The utility model provides a pair of three-cylinder linkage calipers with an anti-lock function, which effectively solves the problems of complicated structure, high manufacturing and maintenance cost, non-uniform braking force distribution, wheel lock and the like caused by non-uniform stress of pistons in the traditional four-piston calipers.

Description

Technical Field

[0001] The utility model specifically relates to a three-cylinder linkage anti-lock caliper. Background Art

[0002] A caliper is a key component in a vehicle braking system, mainly used to convert hydraulic pressure into a braking action to decelerate or stop the vehicle. During braking, the pistons inside the caliper are affected by hydraulic pressure and press against the rotating component - the brake disc connected to the wheel. This pressure is transmitted to the brake disc through the brake pads, causing the vehicle to decelerate or stop.

[0003] The Chinese utility model patent document with the publication number "CN220956546U" discloses a four-piston caliper, which mainly consists of a large caliper body, a small caliper body, brake pads, spring plates, socket head cap screws, grease hole screws, sealing rings, five-wire bodies, O-rings, hexagon socket head cap screws with oil holes, hexagon socket head cap screws with perforations, and round head socket head cap screws, etc. Among them, a pair of upper and lower large caliper pistons and a pair of lower small caliper pistons are respectively arranged on the lower side of the large caliper body and the upper side of the small caliper body. Caliper large piston oil seals and caliper small piston oil seals are respectively arranged on the outer peripheries of the large caliper pistons and the small caliper pistons. A pair of brake pads is arranged between the caliper large piston oil seal and the caliper small piston oil seal, and a spring plate is arranged between the pair of brake pads. The O-ring of the five-wire body is installed on the lower side of the small caliper body and is connected to the lower side of the small caliper body through a hexagon socket head cap screw with an oil hole.

[0004] The main technical problems existing in the use of four pistons in this technical solution are as follows:

[0005] Firstly, the design of four pistons increases the structural complexity of the caliper, thereby increasing the difficulty and cost of manufacturing and maintenance;

[0006] Secondly, since the four pistons are divided into two groups in pairs and respectively correspond to a group of brake pads, there are only two force application points on each group of brake pads. Once the hydraulic pressure distribution is uneven, it will inevitably lead to uneven forces on the large caliper body and the small caliper body when they are stressed, resulting in a relatively large braking force at or near a certain force application point, and it is very easy to cause wheel lock-up. Content of the Utility Model

[0007] The technical problem to be solved by the utility model is to provide a three-cylinder linkage anti-lock caliper aiming at the deficiencies of the above-mentioned prior art, effectively solving the problems of structural complexity, high manufacturing and maintenance costs, uneven braking force distribution caused by uneven piston forces, and wheel lock-up in traditional four-piston calipers.

[0008] To achieve the above object, the utility model provides the following technical solutions:

[0009] A three-cylinder linkage anti-lock caliper, comprising a caliper body, wherein an open-shaped caliper jaw is provided on the caliper body, upper and lower brake shoe blocks straddling both sides of the brake disc are symmetrically arranged on both sides of the caliper jaw, friction plates are adhered to one side of both the upper and lower brake shoe blocks facing the brake disc, and a piston assembly installed in the caliper body is linked to the side of the upper brake shoe block away from the friction plate. It is characterized in that: the piston assembly includes a main piston mechanism distributed in the middle of the upper brake shoe block, a set of secondary piston mechanisms are provided on both sides of the main piston mechanism, one set of secondary piston mechanisms is linked to the left end of the upper brake shoe block, and the other set of secondary piston mechanisms is linked to the right end of the upper brake shoe block. The main piston mechanism and the secondary piston mechanisms both include a piston cylinder fixedly installed in the caliper body and a piston capable of sliding in the piston cylinder and linked to the upper brake shoe block. An oil inlet is provided at one end of the piston cylinder away from the upper brake shoe block; the lower brake shoe block is fixedly installed on one side of the caliper jaw, and the main piston mechanism and the two sets of secondary piston mechanisms can synchronously drive the upper brake shoe block to approach or move away from the lower brake shoe block.

[0010] With the above technical solution, by adopting the design of a three-cylinder linkage anti-lock caliper, the problems existing in the traditional four-piston caliper, such as structural complexity, high manufacturing and maintenance costs, and uneven braking force distribution and wheel locking caused by uneven piston forces, are effectively solved. The main piston mechanism of this technical solution is located at the center of the upper brake shoe block, ensuring that the hydraulic pressure can be evenly transmitted to the upper brake shoe block. The two sets of secondary piston mechanisms are symmetrically arranged on both sides of the main piston mechanism and are linked to the left and right ends of the upper brake shoe block. Such a layout ensures the synchronous transmission of force and uniform force application, so that the clamping force of the friction plate on the brake disc is uniform, avoiding the risk of wheel locking. At the same time, by reducing the number of pistons and integrating them into the upper brake shoe block, the lower brake shoe block does not need to be linked with pistons, thus reducing the structural complexity of the caliper and the production and maintenance costs.

[0011] The above-mentioned three-cylinder linkage anti-lock caliper can be further set as: the piston includes a plug body, a telescopic spring, and a baffle plate arranged in sequence along the direction of the piston cylinder facing the upper brake shoe block. A spring installation cavity is provided at one end of the plug body facing the baffle plate. One end of the telescopic spring is inserted into the spring installation cavity and the other end is connected to the baffle plate. A compensation ring is provided between the baffle plate and the upper brake shoe block. The compensation ring is circular and a set of openings are provided in the circumferential direction.

[0012] The above technical solution improves the response speed and uniformity of the caliper's braking force. First, the plug body, telescopic spring, and baffle are arranged in sequence: this layout ensures that the telescopic spring can be compressed when the piston is subjected to hydraulic pressure, thereby providing a certain buffer and reducing the impact of the impact force on the system. The telescopic spring allows the piston to have a certain displacement when it is subjected to force, which helps to absorb the impact and protect the caliper and brake disc from overload damage. Secondly, the plug body is provided with a spring installation cavity: this design feature allows the telescopic spring to be stably installed inside the piston, ensuring the correct position of the spring during movement, thereby improving the reliability and stability of the entire caliper. Furthermore, the telescopic spring is connected to the baffle: one end of the telescopic spring is connected to the baffle, and this design enables the telescopic spring to effectively transmit force to the baffle when the plug body moves, thereby pushing the upper brake shoe to brake. Finally, the compensation ring between the baffle and the upper brake shoe: the design of the compensation ring helps to compensate for the gap, and the circular design and circumferential opening of the compensation ring provide a certain elasticity, so that it can be automatically adjusted during the braking process to keep the contact pressure between the brake pad and the brake disc uniform.

[0013] The above-mentioned three-cylinder linkage caliper with anti-lock braking can be further configured as follows: the piston cylinder is provided with a first mounting shaft hole for slidingly cooperating with the plug body, and a second mounting shaft hole cooperating with the baffle, the inner diameter of the second mounting shaft hole is larger than the inner diameter of the second mounting shaft hole, the outer diameter of the baffle is larger than the outer diameter of the plug body, and a slope is provided at the connection between the first mounting shaft hole and the second mounting shaft hole; the outer peripheral sleeve of the piston cylinder is provided with two groups of oil seals, and the two groups of oil seals are distributed in the first mounting shaft hole.

[0014] By adopting the above technical solution, the design of "the first mounting shaft hole and the plug body slidingly cooperate, and the second mounting shaft hole and the baffle cooperate" allows the plug body to slide smoothly in the piston cylinder to adapt to the displacement requirements under different pressures, that is, to control the forward and backward movement of the upper rotating shoe. The design of "the inner diameter of the second mounting shaft hole is larger than the inner diameter of the second mounting shaft hole, and the outer diameter of the baffle is larger than the outer diameter of the plug body" can, on the one hand, avoid excessive resetting of the piston from causing a large impact on the upper brake shoe; on the other hand, the contact area between the baffle and the upper brake shoe is larger than the direct contact area between the piston and the upper brake shoe, which can more effectively transmit power to the upper brake shoe. The design of the inclined surface helps to smoothly transition the different diameters of the two shaft holes, reduce stress concentration, and make the piston smoother during movement, reducing stress concentration caused by sudden diameter changes. Double oil seals are designed to prevent hydraulic oil leakage. At the same time, the oil seal can also keep the piston cylinder clean and prevent contaminants from entering.

[0015] The above-mentioned three-cylinder linkage anti-lock caliper can be further set as follows: The caliper body is provided with a main mounting shaft hole for installing the main piston mechanism, and two groups of sub-mounting shaft holes for installing two groups of sub-piston mechanisms respectively. The inner diameter of the main mounting shaft hole is larger than that of the sub-mounting shaft hole, and the inner diameters of the two groups of sub-mounting shaft holes are the same. Two dust covers are respectively sleeved on the outer circumferences of the main piston cylinder and the sub-piston cylinder.

[0016] Adopting the above technical solution, the design of "the inner diameter of the main mounting shaft hole is larger than that of the sub-mounting shaft hole, and the inner diameters of the two groups of sub-mounting shaft holes are the same" can realize the installation of the main piston mechanism with a larger power, and the powers of the two sub-piston mechanisms installed on both sides are the same. On the one hand, it improves the driving force, and on the other hand, it avoids the situation of force imbalance. The design of the dust cover prevents dust and impurities from entering the inside of the piston cylinder, reduces the wear between the piston and the cylinder block, and extends the service life of the braking system.

[0017] The above-mentioned three-cylinder linkage anti-lock caliper can be further set as follows: On one side of the caliper body corresponding to the lower brake shoe, there are 3 process holes. The process holes are circular, and the upper ends of the process holes are open; A guide post is provided at the lower part of the caliper body, and the guide post is integrally formed with the caliper body through a flange.

[0018] Adopting the above technical solution, the design of the process holes helps to reduce the weight of the caliper body, and at the same time provides convenience for fixing or positioning during the manufacturing and assembly processes. Designing the process holes as circular helps to disperse stress concentration. The design of the guide post provides a stable reference point to ensure the correct position and movement path of the brake shoe during braking. This helps to improve the braking accuracy and reduce unnecessary wear caused by the misalignment of the shoe. The design of integrally forming the guide post and the caliper body improves the structural strength between the guide post and the caliper body and reduces potential failure points.

[0019] The above-mentioned three-cylinder linkage anti-lock caliper can be further set as follows: The caliper body includes an active clamping block and a driven clamping block that are distributed oppositely and integrally formed. The piston assembly and the upper brake shoe are installed on the active clamping block, and the lower brake shoe and the 3 process holes are all distributed on the driven clamping block; Connecting holes are respectively provided at the same ends of the active clamping block and the driven clamping block, a guide pin is provided between the two connecting holes, guide pin holes are respectively provided at the same ends of the upper brake shoe and the lower brake shoe, and the guide pin sequentially slides through the two guide pin holes.

[0020] Adopting the above technical solution, the caliper body is composed of an integrally formed active clamping block and a driven clamping block, which improves the rigidity and durability of the caliper. The design of the guide pin, connecting hole, and guide pin hole ensures that the upper brake shoe and the lower brake shoe can maintain the same movement trajectory during braking, reduces unnecessary wear caused by the misalignment of the brake shoe, and improves the overall performance of the braking system.

[0021] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0022] Figure 1 is an exploded view of an embodiment of the present utility model;

[0023] Figure 2 is a schematic view of the pliers body of an embodiment of the present utility model;

[0024] Figure 3 is a schematic view of the structure after removing the pliers body of an embodiment of the present utility model;

[0025] Figure 4 is an exploded view of the main piston mechanism of an embodiment of the present utility model;

[0026] Figure 5 is a schematic view of the assembled state of an embodiment of the present utility model.

[0027] Label annotation: pliers body 1, upper brake shoe 2, lower brake shoe 3, friction plate 4, main piston mechanism 5, auxiliary piston mechanism 6, piston cylinder 7, piston 8, oil inlet 9, plug body 10, telescopic spring 11, baffle 12, spring installation cavity 13, compensation ring 14, first mounting shaft hole 15, second mounting shaft hole 16, inclined surface 17, oil seal 18, main mounting shaft hole 19, auxiliary mounting shaft hole 20, dust cover 21, process hole 22, guide post 23, active clamping block 24, driven clamping block 25, connection hole 26, guide pin 27, guide pin hole 28. Specific Embodiments

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] As Figures 1 to 5A three-cylinder linkage anti-lock caliper shown, comprising a caliper body 1, on which there is an open caliper mouth. On both sides of the caliper mouth, an upper brake shoe 2 and a lower brake shoe 3 straddling both sides of the brake disc are symmetrically arranged. On the side facing the brake disc of the upper brake shoe 2 and the lower brake shoe 3, friction pads 4 are adhered respectively. On the side of the upper brake shoe 2 away from the friction pad 4, a piston assembly installed in the caliper body 1 is linked. The piston assembly includes a main piston mechanism 5 distributed in the middle of the upper brake shoe 2. On both sides of the main piston mechanism 5, a set of secondary piston mechanisms 6 are provided. One set of secondary piston mechanisms 6 is linked to the left end of the upper brake shoe 2, and the other set of secondary piston mechanisms 6 is linked to the right end of the upper brake shoe 2. The main piston mechanism 5 and the secondary piston mechanisms 6 both include a piston cylinder 7 fixedly installed in the caliper body 1 and a piston 8 that can slide in the piston cylinder 7 and is linked to the upper brake shoe 2. At the end of the piston cylinder 7 away from the upper brake shoe 2, there is an oil inlet 9; the lower brake shoe 3 is fixedly installed on one side of the caliper mouth. The main piston mechanism 5 and the two sets of secondary piston mechanisms 6 can synchronously drive the upper brake shoe 2 to approach or move away from the lower brake shoe 3. By adopting the design of the three-cylinder linkage anti-lock caliper, the problems existing in the traditional four-piston 8 caliper, such as structural complexity, high manufacturing and maintenance costs, and uneven braking force distribution and wheel lock-up caused by uneven force on the piston 8, are effectively solved. The main piston mechanism 5 of this technical solution is located at the center of the upper brake shoe 2, ensuring that the hydraulic pressure can be evenly transmitted to the upper brake shoe 2. The two sets of secondary piston mechanisms 6 are symmetrically arranged on both sides of the main piston mechanism 5 and are linked to the left and right ends of the upper brake shoe 2. Such a layout ensures the synchronous transmission of force and uniform force application, so that the clamping force of the friction pad 4 on the brake disc is uniform, avoiding the risk of wheel lock-up. At the same time, by reducing the number of pistons 8 and integrating them into the upper brake shoe 2, the lower brake shoe 3 does not need to be linked to the piston 8, thereby reducing the structural complexity of the caliper and the production and maintenance costs.

[0030] The piston 8 includes a plug body 10, a telescopic spring 11, and a baffle 12 which are arranged in sequence along the direction of the piston cylinder 7 toward the upper brake shoe 2. The plug body 10 is provided with a spring installation cavity 13 at one end facing the baffle 12. One end of the telescopic spring 11 is inserted into the spring installation cavity 13 and the other end is connected to the baffle 12. A compensation ring 14 is provided between the baffle 12 and the upper brake shoe 2. The compensation ring 14 is circular and has a group of openings in the circumferential direction. The response speed of the caliper and the uniformity of the braking force are improved. First, the plug body 10, the telescopic spring 11, and the baffle 12 are arranged in sequence: this layout ensures that when the piston 8 is subjected to hydraulic pressure, the telescopic spring 11 can be compressed, thereby providing a certain buffer and reducing the impact of the impact force on the system. The telescopic spring 11 allows the piston 8 to have a certain displacement when subjected to force, which helps to absorb the impact and protect the caliper and the brake disc from overload damage. Secondly, the plug body 10 is provided with a spring installation cavity 13: this design feature allows the telescopic spring 11 to be stably installed inside the piston 8, ensuring the correct position of the spring during movement, thereby improving the reliability and stability of the entire caliper. Furthermore, the telescopic spring 11 is connected to the baffle 12: one end of the telescopic spring 11 is connected to the baffle 12. This design allows the telescopic spring 11 to effectively transfer force to the baffle 12 when the plug body 10 moves, thereby pushing the upper brake shoe 2 to brake. Finally, the compensation ring 14 between the baffle 12 and the upper brake shoe 2: the design of the compensation ring 14 helps to compensate for the gap. The circular design and circumferential opening of the compensation ring 14 provide a certain degree of elasticity, so that it can be automatically adjusted during the braking process to keep the contact pressure between the brake pad and the brake disc uniform.

[0031] The piston cylinder 7 includes a first mounting shaft hole 15 for slidingly mating with the plug body 10 and a second mounting shaft hole 16 for mating with the baffle 12. The inner diameter of the second mounting shaft hole 16 is larger than that of the second mounting shaft hole 16 (should this be a typo? Assuming it means the first mounting shaft hole 15), the outer diameter of the baffle 12 is larger than the outer diameter of the plug body 10, and a chamfer 17 is provided at the connection between the first mounting shaft hole 15 and the second mounting shaft hole 16; two sets of oil seals 18 are sleeved on the outer periphery of the piston cylinder 7, and the two sets of oil seals 18 are distributed within the first mounting shaft hole 15. By designing that "the first mounting shaft hole 15 slidingly mates with the plug body 10 and the second mounting shaft hole 16 mates with the baffle 12", the plug body 10 can slide smoothly within the piston cylinder 7 to adapt to the displacement requirements under different pressures, that is, to control the forward and backward movement of the upper rotating shoe. By designing that "the inner diameter of the second mounting shaft hole 16 is larger than that of the first mounting shaft hole 15 (again, assuming correction of the typo), and the outer diameter of the baffle 12 is larger than the outer diameter of the plug body 10", on the one hand, it avoids a large impact on the upper brake shoe 2 caused by the excessive reset of the piston 8; on the other hand, the contact area between the baffle 12 and the upper brake shoe 2 is larger than the contact area between the piston 8 directly and the upper brake shoe 2, which can more effectively transmit power to the upper brake shoe 2. The design of the chamfer 17 helps to smoothly transition the different diameters of the two shaft holes, reduce stress concentration, and make the piston 8 move more smoothly during operation, reducing the stress concentration caused by sudden diameter changes. The design of the double oil seals 18 prevents hydraulic oil leakage, and at the same time, the oil seals 18 can also keep the inside of the piston cylinder 7 clean and prevent contaminants from entering.

[0032] The pliers body 1 is provided with a main mounting shaft hole 19 for mounting the main piston mechanism 5 and two sets of sub-mounting shaft holes 20 for respectively mounting two sets of sub-piston mechanisms 6. The inner diameter of the main mounting shaft hole 19 is larger than the inner diameter of the sub-mounting shaft holes 20, the inner diameters of the two sets of sub-mounting shaft holes 20 are the same, and two sets of dust covers 21 are respectively sleeved on the outer peripheries of the main piston cylinder 7 and the sub-piston cylinder 7. By designing that "the inner diameter of the main mounting shaft hole 19 is larger than the inner diameter of the sub-mounting shaft holes 20 and the inner diameters of the two sets of sub-mounting shaft holes 20 are the same", a main piston mechanism 5 with a larger installation power can be realized, and the powers of the two sets of sub-piston mechanisms 6 mounted on both sides are the same. On the one hand, it improves the driving force, and on the other hand, it avoids the situation of force imbalance. The design of the dust covers 21 prevents dust and impurities from entering the inside of the piston cylinder 7, reduces the wear between the piston 8 and the cylinder block, and extends the service life of the braking system.

[0033] On one side of the caliper body 1 corresponding to the lower brake shoe 3, there are three groups of process holes 22. The process holes 22 are circular, and the upper ends of the process holes 22 are open. A guide post 23 is provided at the lower part of the caliper body 1, and the guide post 23 is integrally formed with the caliper body 1 through a flange. The design of the process holes 22 helps to reduce the weight of the caliper body 1 and at the same time provides convenience for fixing or positioning during manufacturing and assembly. Designing the process holes 22 as circular helps to disperse stress concentration. The design of the guide post 23 provides a stable reference point to ensure the correct position and movement path of the brake shoe during braking. This helps to improve the braking accuracy and reduce unnecessary wear caused by the misalignment of the brake shoes. The design of integrally forming the guide post 23 with the caliper body 1 improves the structural strength between the guide post 23 and the caliper body 1 and reduces potential failure points.

[0034] The caliper body 1 includes an active clamping block 24 and a driven clamping block 25 which are distributed oppositely and integrally formed. The piston assembly and the upper brake shoe 2 are installed on the active clamping block 24, and the lower brake shoes 3 and the three groups of process holes 22 are all distributed on the driven clamping block 25. Connecting holes 26 are respectively provided at the same ends of the active clamping block 24 and the driven clamping block 25. A guide pin 27 is provided between the two groups of connecting holes 26. Guide pin holes 28 are respectively provided at the same ends of the upper brake shoe 2 and the lower brake shoe 3, and the guide pin 27 sequentially slides through the two groups of guide pin holes 28. The caliper body 1 is composed of the integrally formed active clamping block 24 and the driven clamping block 25, which improves the rigidity and durability of the caliper. The design of the guide pin, the connecting holes 26 and the guide pin holes 28 ensures that the upper brake shoe 2 and the lower brake shoe 3 can maintain the same movement trajectory during braking, reduces unnecessary wear caused by the misalignment of the brake shoes, and improves the overall performance of the braking system.

[0035] When hydraulic pressure acts on the piston assembly, the main piston mechanism 5 and the two groups of sub-piston mechanisms 6 synchronously push the upper brake shoe 2 to move towards the lower brake shoe 3. Until the friction plate 4 connected to the upper brake shoe 2 contacts the brake disc, the whole caliper (except the upper brake shoe 2 and the friction plate 4) will move in the opposite direction as a whole. Until the friction plate 4 connected to the lower brake shoe 3 also contacts the brake disc, so that the two friction plates 4 contact the brake disc to generate braking force. The design of three-cylinder linkage ensures the uniform transmission and distribution of force and avoids the risk of wheel locking. At the same time, components such as the telescopic spring 11, the baffle 12 and the compensation ring 14 in the caliper provide a certain amount of buffering and clearance compensation, ensuring the smoothness and reliability of braking. The designs of the guide post 23, the process holes 22, the dust cover 21, etc. improve the structural strength, manufacturing convenience and maintenance performance of the caliper.

Claims

1. A three-cylinder linkage caliper with anti-lock brake, comprising a caliper body, the caliper body is provided with an open jaw, the two sides of the jaw are symmetrically provided with an upper brake shoe and a lower brake shoe straddling the two sides of the brake disc, the upper brake shoe and the lower brake shoe are respectively located on the side facing the brake disc and are adhered with a friction plate, the upper brake shoe is located on the side away from the friction plate and is linked with a piston assembly installed in the caliper body, characterized in that: The piston assembly includes a main piston mechanism distributed in the middle of the upper brake shoe, a group of auxiliary piston mechanisms are provided on both sides of the main piston mechanism, one group of auxiliary piston mechanisms is linked to the left end of the upper brake shoe, and the other group of auxiliary piston mechanisms is linked to the right end of the upper brake shoe. The main piston mechanism and the auxiliary piston mechanism both include a piston cylinder fixedly installed in the caliper body, a piston that can slide in the piston cylinder and link with the upper brake shoe, and an oil inlet is provided at the end of the piston cylinder away from the upper brake shoe; the lower brake shoe is fixedly installed on one side of the caliper, and the main piston mechanism and the two groups of auxiliary piston mechanisms can synchronously drive the upper brake shoe to approach or move away from the lower brake shoe.

2. A three-cylinder linkage caliper with anti-lock brake according to claim 1, characterized in that: The piston includes a plug body, a telescopic spring and a baffle which are arranged in sequence along the direction of the piston cylinder toward the upper brake shoe. The plug body is provided with a spring installation cavity at one end facing the baffle. One end of the telescopic spring is inserted into the spring installation cavity and the other end is connected to the baffle. A compensation ring is provided between the baffle and the upper brake shoe. The compensation ring is circular and has a group of openings circumferentially.

3. A three-cylinder linkage caliper with anti-lock brake according to claim 2, characterized in that: The piston cylinder is provided with a first mounting shaft hole for slidingly cooperating with the plug body and a second mounting shaft hole cooperating with the baffle plate, the inner diameter of the second mounting shaft hole is larger than the inner diameter of the second mounting shaft hole, the outer diameter of the baffle plate is larger than the outer diameter of the plug body, and a slope is provided at the connection between the first mounting shaft hole and the second mounting shaft hole; the outer peripheral sleeve of the piston cylinder is provided with two groups of oil seals, and the two groups of oil seals are distributed in the first mounting shaft hole.

4. A three-cylinder linkage caliper with anti-lock brake according to claim 3, characterized in that: The caliper body is provided with a main mounting shaft hole for installing a main piston mechanism and two groups of secondary mounting shaft holes for installing two groups of secondary piston mechanisms respectively. The inner diameter of the main mounting shaft hole is larger than the inner diameter of the secondary mounting shaft hole. The inner diameters of the two groups of secondary mounting shaft holes are consistent. The outer circumferences of the main piston cylinder and the secondary piston cylinder are respectively covered with two groups of dust covers.

5. The three-cylinder linkage caliper with anti-lock brake according to claim 4, characterized in that: The caliper body is provided with three groups of process holes on one side corresponding to the lower brake shoe, the process holes are circular, and the upper ends of the process holes are open; the lower part of the caliper body is provided with a guide column, and the guide column is integrally formed with the caliper body through a flange edge.

6. A three-cylinder linkage caliper with anti-lock brake according to claim 5, characterized in that: The caliper body includes an active clamping block and a passive clamping block which are relatively distributed and integrally formed. The piston assembly and the upper brake shoe are installed on the active clamping block, and the lower brake shoe and three groups of process holes are distributed on the passive clamping block. The active clamping block and the passive clamping block are respectively provided with connecting holes at the same end, and a guide pin is provided between the two groups of connecting holes. The upper brake shoe and the lower brake shoe are respectively provided with guide pin holes at the same end, and the guide pin slides through the two groups of guide pin holes in sequence.

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