Floating caliper type radial pneumatic disc brake

Abstract

The invention relates to a floating caliper type radial air pressure disc brake which comprises a support, a caliper body, a pair of friction plates, a push rod assembly and a lever. A brake cavity and a caliper inner cavity are formed in the caliper body, the brake cavity vertically penetrates through the caliper body, and the caliper inner cavity communicates with the brake cavity; a mounting surface is formed on the caliper body at the rear port of the caliper body, and the mounting surface is a horizontal plane; a synchronous face is formed on the rear side of the caliper body and is a vertical plane, the synchronous face is of an n-shaped structure, a main adjusting installation hole and an auxiliary adjusting installation hole are formed in the two sides of the lower end of the synchronous face respectively, and four dragging rods used for supporting a chain are arranged at the upper end of the synchronous face. The caliper body is directly and integrally formed, and meanwhile, the structure of the caliper body is optimally designed, so that the light weight and the overall strength of the brake are realized, and the brake is convenient to assemble, maintain and maintain.

Description

Technical Field

[0001] The invention relates to the field of automobile brakes, and in particular to a floating caliper radial pneumatic disc brake. Background Art

[0002] The existing radial pneumatic disc brakes still have the following shortcomings: (1) The brake is large in size and heavy in weight. Due to the narrow space on the rear axle, its scope of use is limited and it cannot meet the requirements for lightweighting of the entire vehicle. (2) Most brake caliper bodies are complex split structures with many parts, which is not conducive to processing and assembly. In addition, there is a risk of failure in bolted connections, and more sealing surfaces are required; (3) The parts of the self-adjusting mechanism inside the brake are scattered, which is not conducive to assembly and performance control, and is not convenient for repair and maintenance; (4) The brake split structure is complex and the caliper body has a large rigid deformation, which affects the stable output of the braking torque.

[0003] like Fig. 9 As shown, the caliper body of the conventional brake mainly consists of three parts, a caliper body part A, a caliper body part B and a caliper body part C. The three parts are fastened together by bolts, and various components of the brake are respectively installed in the three caliper body parts.

[0004] The problems with this radial air disc brake in the past are: (1) The brake caliper is large in size and heavy in weight. Due to the narrow space on the rear axle, its scope of use is limited and it cannot meet the requirements for lightweighting of the entire vehicle. (2) The brake caliper body is a split structure with many parts, which is not conducive to processing and assembly. In addition, there is a risk of failure in the bolt connection, and more sealing surfaces are required; (3) The parts of the self-adjusting mechanism inside the brake are scattered, which is not conducive to assembly and performance control, and is not convenient for repair and maintenance; (4) The brake split structure is complex and the caliper body has a large rigid deformation, which affects the stable output of the braking torque. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a floating caliper radial pneumatic disc brake to solve the problem that the previous brakes are of split structure, resulting in complex brake structure and inconvenient assembly.

[0006] The technical solution adopted by the present invention to solve the technical problem is: A floating caliper radial pneumatic disc brake is provided, comprising: bracket, caliper body, a pair of friction plates, pushrod assembly, and lever; A brake cavity and a clamp inner cavity are formed on the caliper body. The brake cavity penetrates the caliper body vertically. The clamp inner cavity communicates with the brake cavity, and the rear port of the clamp inner cavity is adapted to connect to an external air chamber. The upper end of the bracket and the friction plate are both located in the brake cavity, and the friction plate is arranged at the upper end of the bracket. The push rod assembly and the lever are both arranged in the clamp inner cavity. The push rod assembly is adapted to push the friction plate. The lever is horizontally arranged in the clamp inner cavity, with its front end connected to the push rod assembly and its rear end extending to the rear port of the clamp inner cavity. An installation surface is formed on the caliper body at the rear port of the caliper body, and the installation surface is a horizontal plane. A synchronization surface is formed at the rear side of the caliper body. The synchronization surface is a vertical plane and has a "冂" - shaped structure. Main adjustment installation holes and slave adjustment installation holes are respectively opened on both sides at the lower end of the synchronization surface, and four drag rods for supporting the chain are arranged at the upper end of the synchronization surface. A main adjustment mechanism and a slave adjustment mechanism are arranged at the rear side of the push rod assembly. The rear ends of the main adjustment mechanism and the slave adjustment mechanism respectively extend out from the main adjustment installation hole and the slave adjustment installation hole. A main sprocket is arranged at the rear end of the main adjustment mechanism, a slave sprocket is arranged at the rear side of the slave adjustment mechanism, and a chain is connected between the main sprocket and the slave sprocket. The chain is placed on the four drag rods.

[0007] Furthermore, a protective cover is arranged on the synchronization surface. The main sprocket, the slave sprocket, and the chain are all located inside the protective cover, and the protective cover has a "冂" - shaped structure.

[0008] Furthermore, a pair of bearing installation grooves are formed in the clamp inner cavity. The bearing installation grooves are semi - circular structures, and clamping grooves are opened at both the upper end and the lower end of the bearing installation grooves. Semicircular needle roller bearings are arranged in the bearing installation grooves. A pair of clamping blocks are arranged on the bearing seats of the semicircular needle roller bearings, and the clamping blocks cooperate with the clamping grooves to fix the semicircular needle roller bearings in the bearing installation grooves. The lever forms two arc - shaped supporting parts, and the lever cooperates with the semicircular needle roller bearings through the arc - shaped supporting parts.

[0009] Furthermore, a connecting surface is formed at the front port of the clamp inner cavity, and a plurality of connecting holes are opened on the connecting surface. The mounting plate of the push rod assembly is connected to the connecting holes by screws, thereby fixing the mounting plate on the connecting surface.

[0010] Furthermore, the push rod assembly includes a mounting plate, a support seat, a return spring, a pair of retaining rings, a pair of push rods, a main adjustment mechanism, and a slave adjustment mechanism; The push rods are arranged on both sides of the support seat and form a spiral fit with the support seat. The front ends of the push rods pass through the mounting plate and are connected to a push plate, and the push plate is adapted to cooperate with the friction plate. A return spring is arranged between the front side of the support seat and the mounting plate, and the rear side of the support seat cooperates with the lever; The main adjustment mechanism and the secondary adjustment mechanism are respectively connected to two push rods.

[0011] Furthermore, the inner cavity of the caliper includes a first inner cavity and a second inner cavity of the caliper. The first inner cavity of the caliper is a wide cavity and is connected to the brake cavity. The push rod assembly is located in the first inner cavity of the caliper. The second inner cavity of the caliper is a narrow cavity. The rear end of the lever extends into the second inner cavity of the caliper. The rear port of the caliper body is connected to the rear end of the second inner cavity of the caliper; A flange body is formed on the caliper body at the junction of the first inner cavity and the second inner cavity of the caliper. The flange body has a "冂" - shaped structure, and the synchronization surface is located on the rear side of the flange body.

[0012] The beneficial effects of the present invention are: For the floating - caliper radial pneumatic disc brake of the present invention, the caliper body is directly integrally formed, and at the same time, the structure of the caliper body is optimized. This can achieve the lightweight and overall strength of the brake, and also facilitate the assembly, maintenance, and repair of the brake.

[0013] The main adjustment mounting hole and the secondary adjustment mounting hole are directly opened on the rear side of the caliper body, so that the rear ends of the main adjustment mechanism and the secondary adjustment mechanism can directly extend out from the main adjustment mounting hole and the secondary adjustment mounting hole. The main sprocket, the secondary sprocket, and the chain can be directly installed outside the caliper body, which is convenient for the disassembly and assembly of the brake.

[0014] In the brake, the semi - circular needle roller bearing is directly clamped to the caliper body through a clamping block, making it more convenient to install the lever in the brake caliper body. Brief Description of the Drawings

[0015] The present invention will be further described below with reference to the drawings.

[0016] Figure 1 is a schematic diagram of the floating - caliper radial pneumatic disc brake of the present invention; Figure 2 is a half - sectional view of the floating - caliper radial pneumatic disc brake of the present invention; Figure 3 and Figure 4 is a schematic diagram of the caliper body; Figure 5 is a half - sectional view of the caliper body; Figure 6 is a schematic diagram of the chain connecting the main adjustment mechanism and the secondary adjustment mechanism; Figure 7 is a schematic diagram of the semi - circular needle roller bearing; Figure 8 is a schematic diagram of the push rod assembly; Fig. 9 is a schematic diagram of a traditional split - type caliper body; Among them, 1. Bracket, 11. Friction plate; 2. caliper body, 2a. brake chamber, 2b. first chamber in the caliper, 2c. second chamber in the caliper; 21. Mounting surface, 21-1. Rear port, 22. Synchronous surface, 22-1. Main adjustment mounting hole, 22-2. Slave adjustment mounting hole, 23. Drag rod, 24. Connection surface, 25. Flange body; 3. push rod assembly, 31. support seat, 32. push rod, 33. main adjustment mechanism, 33-1. main sprocket, 34. slave adjustment mechanism, 34-1. slave sprocket, 35. chain, 36. mounting plate, 37. return spring, 38. retaining ring; 4. Protective cover, 5. Lever, 6. Semicircular needle roller bearing, 61. Block. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present application provides a floating caliper radial pneumatic disc brake, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0019] In order to solve the technical problem that the brake in the prior art is a split structure, resulting in a complex brake structure and inconvenient assembly, an embodiment of the present application provides a floating caliper radial pneumatic disc brake, which is described in detail below.

[0020] like Figures 1 to 8 As shown, a floating caliper radial pneumatic disc brake comprises A bracket 1, a caliper body 2, a pair of friction plates 11, a push rod assembly 3 and a lever 5; The caliper body 2 is provided with a brake chamber 2a and a caliper inner chamber, the brake chamber 2a passes through the caliper body 2 from top to bottom, the caliper inner chamber is communicated with the brake chamber 2a, and the rear port 21-1 of the caliper inner chamber is suitable for connecting to an external air chamber; The upper end of the bracket 1 and the friction plate 11 are both located in the brake chamber 2a, and the friction plate 11 is arranged at the upper end of the bracket 1; The push rod assembly 3 and the lever 5 are both arranged in the caliper cavity. The push rod assembly 3 is adapted to push the friction plate 11. The lever 5 is horizontally arranged in the caliper cavity, with its front end connected to the push rod assembly 3 and its rear end extending to the rear port 21-1 of the caliper cavity. An installation surface 21 is formed on the caliper body 2 at the rear port 21-1 of the caliper body 2, and the installation surface 21 is a horizontal plane. A synchronization surface 22 is formed at the rear side of the caliper body 2. The synchronization surface 22 is a vertical plane. The synchronization surface 22 is in a "冂" - shaped structure. Main adjustment mounting holes 22-1 and secondary adjustment mounting holes 22-2 are respectively opened on both sides at the lower end of the synchronization surface 22. Four drag rods 23 for supporting the chain 35 are arranged at the upper end of the synchronization surface 22. A main adjustment mechanism 33 and a secondary adjustment mechanism 34 are arranged at the rear side of the push rod assembly 3. The rear ends of the main adjustment mechanism 33 and the secondary adjustment mechanism 34 respectively extend out from the main adjustment mounting hole 22-1 and the secondary adjustment mounting hole 22-2. A main sprocket 33-1 is arranged at the rear end of the main adjustment mechanism 33, as Figure 6 shown. A secondary sprocket 34-1 is arranged at the rear side of the secondary adjustment mechanism 34. A chain 35 is connected between the main sprocket 33-1 and the secondary sprocket 34-1, and the chain 35 is placed on the four drag rods 23.

[0021] Specifically, as an alternative implementation in this embodiment, as Figure 1 and Figure 6 shown, a protective cover 4 is arranged on the synchronization surface 22. The main sprocket 33-1, the secondary sprocket 34-1, and the chain 35 are all located inside the protective cover 4. The protective cover 4 is in a "冂" - shaped structure.

[0022] The protective cover 4 is fixed on the synchronization surface 22 by screws, and the sprockets and the chain 35 located outside the caliper body 2 are shielded and protected by the protective cover 4.

[0023] Specifically, as an alternative implementation in this embodiment, as Figure 2 and Figure 7 shown, a pair of bearing installation grooves are arranged in the caliper cavity. The bearing installation grooves are in a semi - circular structure, and clamping grooves are opened at both the upper end and the lower end of the bearing installation grooves. A semi - circular needle roller bearing 6 is arranged in the bearing installation groove. A pair of clamping blocks 61 are arranged on the bearing seat of the semi - circular needle roller bearing 6, and the clamping blocks 61 cooperate with the clamping grooves to fix the semi - circular needle roller bearing 6 in the bearing installation groove. The lever 5 forms two arc - shaped supporting parts, and the lever 5 cooperates with the semi - circular needle roller bearing 6 through the arc - shaped supporting parts.

[0024] The semi - circular needle roller bearing 6, as Figure 7 shown, forms clamping blocks 61 at both ends of its arc - shaped shaft seat, so that it can be clamped in the caliper body 2.

[0025] Specifically, as an optional implementation in this embodiment, Figure 4 and Figure 8 As shown, the front end of the inner cavity of the forceps forms a circle of connecting surface 24, and a plurality of connecting holes are provided on the connecting surface 24. The mounting plate 36 of the push rod assembly 3 is connected to the connecting holes by screws, so that the mounting plate 36 is fixed to the connecting surface 24.

[0026] Specifically, as an optional implementation in this embodiment, Figure 8 As shown, the push rod assembly 3 includes A mounting plate 36, a support seat 31, a return spring 37, a pair of retaining rings 38, a pair of push rods 32, a main adjustment mechanism 33 and a slave adjustment mechanism 34; The push rod 32 is arranged on both sides of the support seat 31 and forms a spiral fit with the support seat 31. The front end of the push rod 32 passes through the mounting plate 36 and is connected to the push plate. The push plate is suitable for matching with the friction plate 11. A return spring 37 is provided between the front side of the support seat 31 and the mounting plate 36, and the rear side of the support seat 31 cooperates with the lever 5; The main adjustment mechanism 33 and the slave adjustment mechanism 34 are respectively connected to two push rods 32. The push rods 32 are screw rods.

[0027] The retaining ring 38 is connected to the support seat 31 and is pressed onto the support seat 31. The retaining ring 38 is a rubber part with a steel ring installed in its small-diameter mouth, which is then pressed onto the support seat 31. The surface of the retaining ring 38 has tiny holes for ventilation. The function of the retaining ring 38 is to protect the screw sealing cover to prevent oil and dirt from entering.

[0028] Working principle of push rod assembly 3: the rear end of lever 5 cooperates with the air chamber push rod. When the air chamber push rod pushes lever 5 downward, the front end of lever 5 pushes support seat 31 forward, and support seat 31 drives two push rods 32 and push plate to move forward together, so as to realize the braking of friction plate 11. When the air chamber push rod is released, support seat 31 and lever 5 are reset backward under the action of return spring 37.

[0029] The main adjusting mechanism 33 and the slave adjusting mechanism 34 are mainly used to adjust the relative position of the push rod 32 on the support seat 31, thereby adjusting the position of the push plate relative to the support seat 31, and finally controlling the brake clearance between the friction plate 11 and the friction plate on the vehicle.

[0030] The principles of the main adjustment mechanism 33 and the slave adjustment mechanism 34 in this embodiment are existing and will not be elaborated here.

[0031] The caliper body 2 in the brake is integrally designed. When installing the push rod assembly 3 into this caliper body 2, the push rod assembly 3 can be pre-assembled first. The two remaining sprockets and the chain 35 at the rear ends of the main adjustment mechanism 33 and the sub-adjustment mechanism 34 are not installed temporarily. The push rod assembly 3 is inserted into the caliper inner cavity from the front port of the caliper body 2. The mounting plate 36 is tightly connected to the connection surface 24. The rear ends of the main adjustment mechanism 33 and the sub-adjustment mechanism 34 extend out from the main adjustment mounting hole 22-1 and the sub-adjustment mounting hole 22-2 respectively, and then the main sprocket 33-1 and the sub-sprocket 34-1 are installed respectively, and finally the chain 35 is connected.

[0032] This installation method reduces the assembly difficulty of the brake and facilitates disassembly and repair.

[0033] Specifically, as an alternative implementation method in this embodiment, as Figure 3 、 Figure 4 and Figure 5 shown, the caliper inner cavity includes a first caliper inner cavity 2b and a second caliper inner cavity 2c. The first caliper inner cavity 2b is a wide cavity and is connected to the brake cavity 2a. The push rod assembly 3 is located in the first caliper inner cavity 2b. The second caliper inner cavity 2c is a narrow cavity. The rear end of the lever 5 extends into the second caliper inner cavity 2c. The rear port 21-1 of the caliper body 2 is connected to the rear end of the second caliper inner cavity 2c; A flange body 25 is formed on the caliper body 2 at the junction of the first caliper inner cavity 2b and the second caliper inner cavity 2c. The flange body 25 is in a "冂" - shaped structure. The synchronization surface 22 is located on the rear side of the flange body 25.

[0034] The caliper body 2 is integrally formed, and the structure of the caliper inner cavity is optimized. In the past, for the split caliper body 2, the sprockets and the chain 35 of the main adjustment mechanism 33 and the sub-adjustment mechanism 34 were all located inside the caliper body 2. Each component of the push plate assembly was assembled while assembling the split caliper body 2 into a whole, and the assembly efficiency was very low during this process. Now, the integrally formed caliper body 2 has also re-optimized the inner cavity. The sprockets and the chain 35 of the main adjustment mechanism 33 and the sub-adjustment mechanism 34 are all installed outside the caliper body 2, thereby reducing the overall weight of the caliper body 2, achieving lightweight, and the integral structure also makes the caliper body 2 have higher overall strength.

[0035] The caliper body 2 is of an integrally formed structure, and its force-bearing structure is better, avoiding the problem of the failure of the connection bolts of the split caliper, reducing the number of assembled parts, reducing the weight of the brake, having a small rigid deformation amount, improving the rigidity and hardness of the brake, and at the same time increasing the sealing performance of the brake, preventing water and dust from entering the caliper, and improving the service life of the brake.

[0036] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0037] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0040] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0041] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0042] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A floating caliper radial pneumatic disc brake, characterized in that: Comprising: a bracket (1), a caliper body (2), a pair of friction plates (11), a push rod assembly (3) and a lever (5); a brake cavity (2a) and a caliper inner cavity are formed on the caliper body (2), the brake cavity (2a) runs through the caliper body (2) vertically, the caliper inner cavity is communicated with the brake cavity (2a), and the rear port (21-1) of the caliper inner cavity is adapted to connect to an external air chamber; the upper end of the bracket (1) and the friction plates (11) are both located in the brake cavity (2a), and the friction plates (11) are arranged at the upper end of the bracket (1); the push rod assembly (3) and the lever (5) are both arranged in the caliper inner cavity, the push rod assembly (3) is adapted to push the friction plates (11), the lever (5) is horizontally arranged in the caliper inner cavity, its front end is connected to the push rod assembly (3), and its rear end extends to the rear port (21-1) of the caliper inner cavity; an installation surface (21) is formed on the caliper body (2) at the rear port (21-1) of the caliper body (2), and the installation surface (21) is a horizontal plane; a synchronization surface (22) is formed at the rear side of the caliper body (2), the synchronization surface (22) is a vertical plane, the synchronization surface (22) is in a "冂" shaped structure, main adjustment mounting holes (22-1) and secondary adjustment mounting holes (22-2) are respectively opened at both sides of the lower end of the synchronization surface (22), and four drag rods (23) for supporting a chain (35) are arranged at the upper end of the synchronization surface (22); a main adjustment mechanism (33) and a secondary adjustment mechanism (34) are arranged at the rear side of the push rod assembly (3), the rear ends of the main adjustment mechanism (33) and the secondary adjustment mechanism (34) respectively extend out from the main adjustment mounting hole (22-1) and the secondary adjustment mounting hole (22-2), a main sprocket (33-1) is arranged at the rear end of the main adjustment mechanism (33), a secondary sprocket (34-1) is arranged at the rear side of the secondary adjustment mechanism (34), a chain (35) is connected between the main sprocket (33-1) and the secondary sprocket (34-1), and the chain (35) is placed on the four drag rods (23).

2. The floating caliper radial pneumatic disc brake according to claim 1, characterized in that a protective cover (4) is arranged on the synchronization surface (22), the main sprocket (33-1), the secondary sprocket (34-1) and the chain (35) are all located inside the protective cover (4), and the protective cover (4) is in a "冂" shaped structure.

3. The floating caliper radial pneumatic disc brake according to claim 1, characterized in that a pair of bearing mounting grooves are arranged in the caliper inner cavity, the bearing mounting grooves are in a semi-circular structure, and clamping grooves are opened at both the upper end and the lower end of the bearing mounting grooves; semi-circular needle roller bearings (6) are arranged in the bearing mounting grooves, a pair of clamping blocks (61) are arranged on the bearing seats of the semi-circular needle roller bearings (6), and the clamping blocks (61) are matched with the clamping grooves to fix the semi-circular needle roller bearings (6) in the bearing mounting grooves; the lever (5) forms two arc-shaped supporting parts, and the lever (5) is matched with the semi-circular needle roller bearings (6) through the arc-shaped supporting parts.

4. The floating caliper radial pneumatic disc brake according to claim 1, characterized in that A connecting surface (24) is formed at the front port of the inner cavity of the clamp. A plurality of connecting holes are formed in the connecting surface (24). The mounting plate (36) of the push rod assembly (3) is connected to the connecting holes by screws, so as to fix the mounting plate (36) on the connecting surface (24).

5. The floating caliper radial pneumatic disc brake according to claim 1, wherein the push rod assembly (3) includes a mounting plate (36), a support seat (31), a return spring (37), a pair of retaining rings (38), a pair of push rods (32), a main adjustment mechanism (33) and a secondary adjustment mechanism (34); the push rods (32) are arranged on both sides of the support seat (31) and form a spiral fit with the support seat (31). The front ends of the push rods (32) pass through the mounting plate (36) and then are connected to a push plate, and the push plate is adapted to cooperate with the friction plate (11); a return spring (37) is arranged between the front side of the support seat (31) and the mounting plate (36), and the rear side of the support seat (31) cooperates with the lever (5); the main adjustment mechanism (33) and the secondary adjustment mechanism (34) are respectively connected to the two push rods (32).

6. The floating caliper radial pneumatic disc brake according to claim 1, wherein the inner cavity of the clamp includes a first inner cavity (2b) and a second inner cavity (2c) of the clamp. The first inner cavity (2b) of the clamp is a wide cavity and is connected to the brake cavity (2a). The push rod assembly (3) is located in the first inner cavity (2b) of the clamp. The second inner cavity (2c) of the clamp is a narrow cavity. The rear end of the lever (5) extends into the second inner cavity (2c) of the clamp. The rear port (21-1) of the caliper body (2) is connected to the rear end of the second inner cavity (2c) of the clamp; a flange body (25) is formed on the caliper body (2) at the junction of the first inner cavity (2b) and the second inner cavity (2c) of the clamp. The flange body (25) is in a "冂" shaped structure, and the synchronization surface (22) is located on the rear side surface of the flange body (25).

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