A spin-formed one-piece automotive brake chamber

Abstract

This invention discloses a spun-formed, one-piece automotive brake chamber, belonging to the technical field of automotive brake chambers. The spun-formed, one-piece automotive brake chamber includes a housing, with a service brake chamber and a parking brake chamber inside. A return bearing is fixedly connected to the outer wall of one end of the return spring, and a piston is fixedly connected to the outer wall of the push rod. A pressure balancing mechanism for protecting the return bearing and piston is provided on the inner wall of the push rod. When brake air is injected into the housing, it enters the area below the piston and the pressure chamber through an air inlet groove, connecting channel, and connecting pipe. As the piston and return bearing slide inside the housing, they compress the brake air below the piston and inside the pressure chamber, counteracting the pressure inside the housing. This reduces the net thrust exerted by the brake air on the surfaces of the piston and return bearing, thereby reducing the risk of deformation of the piston and return bearing, and ensuring the service life and sealing performance of the piston and return bearing.

Description

Technical Field

[0001] This invention relates to the technical field of automotive brake chambers, and in particular to a spin-formed automotive brake chamber. Background Technology

[0002] As the core actuator of the automotive braking system, the brake chamber is widely used in vehicles such as trucks, vans, and buses. Its core function is to convert the pressure of compressed air into mechanical thrust to drive the brake camshaft to rotate and achieve braking action. The structural stability, pressure bearing capacity, and sealing performance of the brake chamber directly determine the reliability and safety of vehicle braking, so there are strict requirements for its manufacturing process.

[0003] Chinese patent CN114439869B discloses a spring brake chamber with a gap-changing self-adjusting sealing function, including a first housing and a second housing, which are connected by a clamp. A partition is provided inside the first housing near one end of the second housing, and a sealing adjustment seat is provided in the middle of the partition. A sealing adjustment mechanism is provided on the sealing adjustment seat, so that when the vehicle is in a non-parking brake state, the parking brake mechanism will not move. At this time, the gas pressure in the parking brake chamber can be used to drive the sealing adjustment mechanism to seal the gap between the sealing adjustment seat and the parking brake mechanism, preventing gas in the parking brake chamber from entering the service brake chamber through the gap, which would cause the service brake force to be automatically activated in the driving state, affecting driving safety.

[0004] However, in this spring brake chamber with gap variation self-adjusting sealing function, when the brake air enters the service brake chamber and parking brake chamber and pushes the reset shaft disc and piston to move, there will be a huge pressure difference on both sides of the reset shaft disc and piston. This will inevitably exert a mechanical effect on the reset shaft disc and piston. After long-term use, it will inevitably damage the reset shaft disc and piston, thereby reducing the sealing performance of the reset shaft disc and piston during use. Summary of the Invention

[0005] The purpose of this invention is to provide a spin-formed, one-piece automotive brake chamber to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a spin-formed automotive brake chamber, comprising a housing, wherein a service brake chamber and a parking brake chamber are disposed inside the housing, a return spring is installed inside the service brake chamber, a return shaft disc is fixedly connected to the outer wall of one end of the return spring, a service brake lever is fixedly connected to the outer wall of the return shaft disc, a diaphragm adapted to the return shaft disc is disposed on the inner wall of the service brake chamber, a guide rod is fixedly connected to the inner wall of the parking brake chamber, a push rod is slidably connected to the surface of the guide rod, a piston is fixedly connected to the outer wall of the push rod, and an energy storage spring adapted to the piston is disposed on the inner wall of the parking brake chamber. The spring, the inner wall of the push rod is provided with a pressure balancing mechanism for protecting the reset shaft disc and the piston, the pressure balancing mechanism includes an air inlet groove, the air inlet groove is opened on the surface of the push rod, the inside of the push rod is provided with a sliding groove, the sliding groove is provided with a through hole, the inside of the push rod is slidably connected with a sliding rod, the inner wall of the push rod is provided with a first reset spring adapted to the sliding rod, the surface of the sliding rod is provided with an air inlet channel, the inside of the sliding groove is slidably connected with a slider, the surface of the slider is provided with a groove, the inner wall of the sliding groove is provided with a second reset spring adapted to the slider, the outer wall of the guide rod is fixedly connected with a push rod, the inner wall of the guide rod is provided with a connecting channel.

[0007] Preferably, the outer wall of the parking brake chamber is provided with a connecting pipe adapted to the service brake chamber, and the inner wall of the top of the service brake chamber is provided with multiple sets of interconnected connecting sleeves that can slide axially, which together with the reset shaft disc form a pressure chamber.

[0008] Preferably, the inner wall of the top of the housing is provided with multiple sets of sleeves that are interlocked and can slide axially; the outer wall of the reset shaft is provided with pressure relief holes adapted to the sleeves; the outer wall of the housing is provided with vent holes adapted to the sleeves; a limit spring is fixedly connected to the surface of the reset shaft; a connecting plate is fixedly connected to the top outer wall of the limit spring; a notch is opened on the outer wall of the connecting plate; a limit ring adapted to the connecting plate is provided on the inner wall of the innermost sleeve; a fixing block is fixedly connected to the inner wall of the vent hole; a limit rod adapted to the connecting plate is provided on the bottom outer wall of the fixing block; and an air outlet is opened on the surface of the fixing block.

[0009] Preferably, a fixing sleeve is fixedly connected to the bottom outer wall of the piston, a fixing rod is fixedly connected to the surface of the housing, a vent groove is provided on the inner wall of the fixing rod, a connection hole adapted to the vent groove is provided on the outer wall of the piston, a piston chamber adapted to the vent groove is provided on the inner wall of the fixing rod, an air inlet adapted to the piston chamber is provided on the surface of the fixing rod, a piston column is slidably connected inside the piston chamber, and an air outlet channel is provided on the bottom outer wall of the piston chamber.

[0010] Preferably, the piston has a storage groove on its outer wall, a sealing airbag is connected to the inner wall of the storage groove, and an air injection channel adapted to the sealing airbag is provided on the outer wall of the piston.

[0011] Preferably, the slider is slidably connected to the groove via a push rod, and multiple sets of grooves are equally spaced along the circumferential direction on the outer periphery of the slider.

[0012] Preferably, the connecting plate is slidably connected to the sleeve via a limiting rod, and multiple sets of notches are provided at equal intervals along the circumferential direction on the outer periphery of the connecting plate.

[0013] Preferably, the outer diameter of the limiting rod is smaller than the inner diameter of the limiting ring, and multiple sets of air outlets are evenly spaced on the surface of the fixing block.

[0014] Preferably, the fixing sleeve is slidably connected to the fixing rod via a piston, and the outer diameter of the piston column matches the inner diameter of the piston chamber.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) When the present invention injects brake air into the inside of the housing, the brake air enters the space below the piston and the pressure chamber through the air inlet groove, the connecting channel and the connecting pipe. When the pressure in the space below the piston reaches a certain height, the sliding rod is pushed upward to prevent the brake air from continuing to enter the space below the piston. Then the brake air continues to be injected into the inside of the housing, thereby pushing the piston and the reset shaft disc to move and squeezing the brake air in the space below the piston and the pressure chamber, thereby increasing the pressure in the space below the piston and the pressure chamber and counteracting the pressure inside the housing, reducing the net thrust of the brake air on the surface of the piston and the reset shaft disc, thereby reducing the risk of deformation of the piston and the reset shaft disc, and ensuring the service life and sealing of the piston and the reset shaft disc.

[0016] (2) When the brake air of the present invention lifts the reset shaft disc upward and squeezes the reset spring, it will push multiple sets of sleeves to retract. When the reset spring reaches its limit, the limit rod will push the connecting plate downward and squeeze the limit spring, and release the limit on the notch. At this time, the brake air located below the reset shaft disc will be discharged through the pressure relief hole and the exhaust hole, which can complete the pressure relief of the space of the vehicle brake chamber located below the reset shaft disc, thereby reducing the force of the brake air applied to the surface of the reset spring through the reset shaft disc and controlling it within a safe range, preventing the reset spring from being damaged due to excessive force. Attached Figure Description

[0017] Figure 1 This is a 3D physical image of a spin-formed automotive brake chamber according to the present invention; Figure 2 This is a schematic diagram of the overall structure of a spin-formed automotive brake chamber according to the present invention; Figure 3 This is a schematic diagram of the internal structure of the shell in this invention; Figure 4 This is a schematic diagram of the interlocking structure of the connecting channel and the connecting pipe in this invention; Figure 5 This is a schematic diagram of the connecting sleeve and the connecting sleeve mating structure in this invention; Figure 6 In this invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 7 In this invention Figure 5 Enlarged structural diagram at point B; Figure 8 In this invention Figure 4 Enlarged structural diagram at point C.

[0018] In the diagram: 1. Housing; 2. Service brake chamber; 3. Parking brake chamber; 4. Return spring; 5. Return shaft disc; 6. Service brake lever; 7. Diaphragm; 8. Guide rod; 9. Push rod; 10. Piston; 11. Energy storage spring; 12. Air inlet groove; 13. Slide groove; 14. Through hole; 15. Slide rod; 16. First return spring; 17. Air inlet passage; 18. Slider; 19. Groove; 20. Second return spring; 21. Push rod; 22. Connecting channel; 23. Connecting... 24. Connecting sleeve; 25. Sleeve; 26. Pressure relief hole; 27. Exhaust hole; 28. Limiting spring; 29. ​​Connecting plate; 30. Notch; 31. Limiting ring; 32. Fixing block; 33. Limiting rod; 34. Air outlet; 35. Fixing sleeve; 36. Fixing rod; 37. Vent groove; 38. Connecting hole; 39. Piston chamber; 40. Air inlet; 41. Piston column; 42. Air outlet channel; 43. Storage groove; 44. Sealing airbag; 45. Air injection channel. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Example 1: Please refer to Figures 1-8This invention provides a technical solution: a spin-formed automotive brake chamber, comprising a housing 1, with a service brake chamber 2 and a parking brake chamber 3 disposed inside the housing 1. A return spring 4 is installed inside the service brake chamber 2, and a return shaft disc 5 is fixedly connected to the outer wall of one end of the return spring 4. A service brake lever 6 is fixedly connected to the outer wall of the return shaft disc 5. A diaphragm 7 adapted to the return shaft disc 5 is disposed on the inner wall of the service brake chamber 2. A guide rod 8 is fixedly connected to the inner wall of the parking brake chamber 3, and a push rod 9 is slidably connected to the surface of the guide rod 8. A piston 10 is fixedly connected to the outer wall of the push rod 9. An energy storage spring 11 adapted to the piston 10 is disposed on the inner wall of the parking brake chamber 3. A diaphragm 7 adapted to the piston 10 is disposed on the inner wall of the push rod 9. A pressure balancing mechanism is provided to protect the reset shaft disc 5 and the piston 10. The pressure balancing mechanism includes an air inlet groove 12, which is formed on the surface of the push rod 9. The push rod 9 has a sliding groove 13 inside, and a through hole 14 in the sliding groove 13. A sliding rod 15 is slidably connected inside the push rod 9. A first reset spring 16 adapted to the sliding rod 15 is provided on the inner wall of the push rod 9. An air inlet channel 17 is formed on the surface of the sliding rod 15. A slider 18 is slidably connected inside the sliding groove 13. A groove 19 is formed on the surface of the slider 18. A second reset spring 20 adapted to the slider 18 is provided on the inner wall of the sliding groove 13. A push rod 21 is fixedly connected to the outer wall of the guide rod 8. A connecting channel 22 is formed on the inner wall of the guide rod 8.

[0022] During use, before the brake air is injected into the parking brake chamber 3, the push rod 21 at the top of the guide rod 8 will push the slider 18 upward, causing the slider 18 to slide upward inside the groove 13 and squeeze the second return spring 20, separating the bottom end of the slider 18 from the surface of the groove 13, thereby releasing the restriction on the groove 19. After the brake air is injected into the parking brake chamber 3, the thrust applied to the surface of the piston 10 by the energy storage spring 11 causes the brake air to first enter the air intake groove 12 and then enter the groove 13 through the air intake channel 17. After entering the groove 13, the brake air will pass through the groove 19 and enter the through hole 14, and then enter the connecting channel 22 and be discharged into the space below the piston 10 inside the parking brake chamber 3. When the pressure in the space below the piston 10 inside the parking brake chamber 3 reaches a certain height, the pressure inside the groove 13 will also increase accordingly. The piston 10 is pushed upward by a force applied to the lower part of the slide rod 15, thereby pushing the slide rod 15 upward and squeezing the first return spring 16. When the slide rod 15 slides upward, it will drive the intake channel 17 to move synchronously, so that one end of the intake channel 17 is separated from the surface of the intake groove 12, and the brake air is limited, preventing the brake air from continuing to enter the space below the piston 10. Then, the brake air continues to be injected into the interior of the parking brake chamber 3, increasing the pressure in the space above the piston 10 inside the parking brake chamber 3, thereby pushing the piston 10 downward along the inner wall of the parking brake chamber 3 and squeezing the energy storage spring 11. When the piston 10 moves downward, it will squeeze the brake air below, increasing the pressure in the space below the piston 10 and counteracting the pressure above the piston 10, reducing the net downward thrust of the brake air on the surface of the piston 10, thereby reducing the risk of piston deformation and ensuring the service life and sealing of the piston 10.

[0023] The outer wall of the parking brake chamber 3 is provided with a connecting pipe 23 that is compatible with the service brake chamber 2. The inner wall of the top of the service brake chamber 2 is provided with multiple sets of connecting sleeves 24 that are interlocked and can slide along the axial direction, and together with the reset shaft disc 5, they form a pressure chamber.

[0024] In use, after the brake air enters the space below the piston 10 inside the parking brake chamber 3, it is injected into the pressure chamber through the connecting pipe 23, increasing the pressure inside the pressure chamber. When the brake air is injected into the service brake chamber 2, it increases the pressure inside the service brake chamber 2, thereby pushing the reset shaft disc 5 to move upward and squeezing the reset spring 4. At the same time, it also causes the diaphragm 7 to deform. Through the upward movement of the reset shaft disc 5, the reset shaft disc 5 pushes the multiple sets of connecting sleeves 24 to contract, reducing the space of the pressure chamber, increasing the pressure inside the pressure chamber, and counteracting the pressure below the reset shaft disc 5. This reduces the net upward thrust of the brake air on the surface of the reset shaft disc 5, thereby reducing the risk of deformation of the reset shaft disc 5 and ensuring the service life of the reset shaft disc 5. At the same time, through the contraction of the multiple sets of connecting sleeves 24, the wall thickness of the pressure chamber increases, increasing the structural strength of the pressure chamber and preventing the connecting sleeves 24 from deforming due to the pressure caused by the compression of the brake air.

[0025] Multiple sets of sleeves 25 are provided on the inner wall of the top of the housing 1, which are interlocked and can slide axially. The outer wall of the reset shaft disk 5 is provided with a pressure relief hole 26 that is adapted to the sleeve 25. The outer wall of the housing 1 is provided with an exhaust hole 27 that is adapted to the sleeve 25. A limit spring 28 is fixedly connected to the surface of the reset shaft disk 5. A connecting plate 29 is fixedly connected to the outer wall of the top of the limit spring 28. A notch 30 is opened on the outer wall of the connecting plate 29. A limit ring 31 adapted to the connecting plate 29 is provided on the inner wall of the innermost sleeve 25. A fixing block 32 is fixedly connected to the inner wall of the exhaust hole 27. A limit rod 33 adapted to the connecting plate 29 is provided on the outer wall of the bottom end of the fixing block 32. An air outlet 34 is opened on the surface of the fixing block 32.

[0026] During use, when brake air is injected into the service brake chamber 2, the thrust applied to the surface of the connecting plate 29 by the limiting spring 28 pushes the surface of the connecting plate 29 to fit against the limiting ring 31, so that the limiting ring 31 limits the notch 30, preventing the brake air entering the service brake chamber 2 from entering the sleeve 25. When the brake air pushes the return shaft disc 5 upward and squeezes the return spring 4, it also pushes multiple sets of sleeves 25 to retract and shortens the distance between the limiting rod 33 and the connecting plate 29. When the return spring 4 reaches its limit, the limiting rod 33 will push the connecting plate 29 downward. The limiting spring 28 is squeezed, causing the connecting plate 29 to separate from the limiting ring 31 and release the limiting of the notch 30. At this time, the brake air located below the reset shaft disc 5 enters the interior of the sleeve 25 through the pressure relief hole 26, passes through the notch 30 and enters the interior of the exhaust hole 27, and finally passes through the air outlet 34 and the fixing block 32 to be discharged from the exhaust hole 27. This completes the pressure relief of the space of the vehicle brake chamber 2 located below the reset shaft disc 5, thereby reducing the force of the brake air applied to the surface of the reset spring 4 through the reset shaft disc 5 and controlling it within a safe range, preventing the reset spring 4 from being damaged due to excessive force.

[0027] A fixing sleeve 35 is fixedly connected to the bottom outer wall of the piston 10, and a fixing rod 36 is fixedly connected to the surface of the housing 1. A venting groove 37 is provided on the inner wall of the fixing rod 36. A connecting hole 38 adapted to the venting groove 37 is provided on the outer wall of the piston 10. A piston chamber 39 adapted to the venting groove 37 is provided on the inner wall of the fixing rod 36. An air inlet 40 adapted to the piston chamber 39 is provided on the surface of the fixing rod 36. A piston column 41 is slidably connected inside the piston chamber 39. An air outlet channel 42 is provided on the bottom outer wall of the piston chamber 39.

[0028] During use, when brake air is injected into the parking brake chamber 3, the brake air enters the vent groove 37 through the connecting hole 38, and finally enters the piston chamber 39. This increases the internal pressure of the piston chamber 39 and applies a thrust to the surface of the piston rod 41, causing the piston rod 41 to limit the air inlet 40, preventing the brake air entering the space below the piston 10 from being discharged through the air inlet 40. When the vehicle is parked, the brake air in the service brake chamber 2 and the parking brake chamber 3 is drawn out. At this time, due to the misalignment of the air inlet groove 12 and the air inlet passage 17, the brake air in the space below the piston 10 cannot flow back to the top of the piston 10 and be discharged. As the brake above the piston 10 is drawn out, the energy storage spring 11 is forced to push the piston 10 upward. The piston moves and pulls the fixed sleeve 35 to slide upward along the surface of the fixed rod 36, thereby reducing the pressure in the space above the piston 10. The brake air inside the piston chamber 39 is extracted through the vent groove 37 and the connecting hole 38, reducing the pressure inside the piston chamber 39. The piston rod 41 is then pulled upward along the surface of the piston chamber 39, releasing the piston rod 41 from its restriction on the air inlet 40. At this time, the brake air in the space below the piston 10 will enter the interior of the piston chamber 39 through the air inlet 40 and finally be discharged through the air outlet 42, reducing the pressure in the space below the piston 10. At this time, the brake air inside the pressure chamber will be subjected to pressure and enter the space below the piston 10 in the parking brake chamber 3 through the connecting pipe 23, and finally be discharged through the air outlet 42.

[0029] A storage groove 43 is provided on the outer wall of the piston 10, and a sealing airbag 44 is connected to the inner wall of the storage groove 43. An air injection channel 45 adapted to the sealing airbag 44 is provided on the outer wall of the piston 10.

[0030] When in use, the piston 10 will compress the brake air below when it descends. After being compressed, the brake air will enter the interior of the sealing airbag 44 through the air injection channel 45, causing the sealing airbag 44 to expand inside the receiving groove 43 and compress the inner wall of the parking brake cavity 3, thereby improving the sealing between the piston 10 and the parking brake cavity 3 when it descends.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A spin-formed automotive brake chamber, comprising a housing (1), wherein a service brake chamber (2) and a parking brake chamber (3) are provided inside the housing (1), a return spring (4) is installed inside the service brake chamber (2), a return shaft disc (5) is fixedly connected to the outer wall of one end of the return spring (4), a service brake lever (6) is fixedly connected to the outer wall of the return shaft disc (5), a diaphragm (7) adapted to the return shaft disc (5) is provided on the inner wall of the service brake chamber (2), a guide rod (8) is fixedly connected to the inner wall of the parking brake chamber (3), a push rod (9) is slidably connected to the surface of the guide rod (8), a piston (10) is fixedly connected to the outer wall of the push rod (9), and an energy storage spring (11) adapted to the piston (10) is provided on the inner wall of the parking brake chamber (3), characterized in that: The inner wall of the push rod (9) is provided with a pressure balancing mechanism for protecting the reset shaft disc (5) and the piston (10); The pressure balancing mechanism includes an air inlet groove (12), which is formed on the surface of the push rod (9). The push rod (9) has a sliding groove (13) inside, and a through hole (14) in the sliding groove (13). A slide rod (15) is slidably connected inside the push rod (9). A first return spring (16) adapted to the slide rod (15) is provided on the inner wall of the push rod (9). An air inlet channel (17) is formed on the surface of the slide rod (15). A slider (18) is slidably connected inside the sliding groove (13). A groove (19) is formed on the surface of the slider (18). A second return spring (20) adapted to the slider (18) is provided on the inner wall of the sliding groove (13). A push rod (21) is fixedly connected to the outer wall of the guide rod (8). A connecting channel (22) is formed on the inner wall of the guide rod (8).

2. The integrally formed automotive brake chamber according to claim 1, characterized in that: The outer wall of the parking brake chamber (3) is provided with a connecting pipe (23) adapted to the service brake chamber (2). The inner wall of the top of the service brake chamber (2) is provided with multiple sets of connecting sleeves (24) that are interlocked and can slide along the axial direction, and together with the reset shaft disc (5) to form a pressure chamber.

3. The integrally formed automotive brake chamber according to claim 1, characterized in that: The top inner wall of the housing (1) is provided with multiple sets of sleeves (25) that are interlocked and can slide along the axial direction. The outer wall of the reset shaft disk (5) is provided with a pressure relief hole (26) that is adapted to the sleeve (25). The outer wall of the housing (1) is provided with an exhaust hole (27) that is adapted to the sleeve (25). A limit spring (28) is fixedly connected to the surface of the reset shaft disk (5). A connecting plate (29) is fixedly connected to the top outer wall of the limit spring (28). A notch (30) is opened on the outer wall of the connecting plate (29). A limit ring (31) that is adapted to the connecting plate (29) is provided on the inner wall of the innermost sleeve (25). A fixing block (32) is fixedly connected to the inner wall of the exhaust hole (27). A limit rod (33) that is adapted to the connecting plate (29) is provided on the bottom outer wall of the fixing block (32). An air outlet (34) is opened on the surface of the fixing block (32).

4. The integrally formed automotive brake chamber according to claim 1, characterized in that: A fixed sleeve (35) is fixedly connected to the bottom outer wall of the piston (10), a fixed rod (36) is fixedly connected to the surface of the housing (1), a ventilation groove (37) is provided on the inner wall of the fixed rod (36), a connection hole (38) adapted to the ventilation groove (37) is provided on the outer wall of the piston (10), a piston chamber (39) adapted to the ventilation groove (37) is provided on the inner wall of the fixed rod (36), an air inlet (40) adapted to the piston chamber (39) is provided on the surface of the fixed rod (36), a piston column (41) is slidably connected inside the piston chamber (39), and an air outlet channel (42) is provided on the bottom outer wall of the piston chamber (39).

5. The integrally formed automotive brake chamber according to claim 4, characterized in that: The piston (10) has a storage groove (43) on its outer wall, and a sealing airbag (44) is connected to the inner wall of the storage groove (43). The piston (10) has an air injection channel (45) adapted to the sealing airbag (44) on its outer wall.

6. The integrally formed automotive brake chamber according to claim 1, characterized in that: The slider (18) is slidably connected to the groove (13) via the push rod (21), and the groove (19) is provided in multiple sets at equal intervals along the circumferential direction on the outer periphery of the slider (18).

7. The integrally formed automotive brake chamber according to claim 3, characterized in that: The connecting plate (29) is slidably connected to the sleeve (25) via the limiting rod (33), and the notch (30) is provided at equal intervals along the circumferential direction on the outer periphery of the connecting plate (29).

8. The integrally formed automotive brake chamber according to claim 3, characterized in that: The outer diameter of the limiting rod (33) is smaller than the inner diameter of the limiting ring (31), and the air outlet (34) is provided in multiple sets at equal intervals on the surface of the fixing block (32).

9. The integrally formed automotive brake chamber according to claim 4, characterized in that: The fixed sleeve (35) is slidably connected to the fixed rod (36) via the piston (10), and the outer diameter of the piston column (41) matches the inner diameter of the piston chamber (39).

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