CN220980170U

CN220980170U - Internal respiration type spring brake air chamber

Info

Publication number: CN220980170U
Application number: CN202322480946.XU
Authority: CN
Inventors: 王淼
Original assignee: Zhejiang Jiajun Auto Parts Co ltd
Current assignee: Zhejiang Jiajun Auto Parts Co ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-05-17
Anticipated expiration: 2033-09-13

Abstract

The utility model discloses an internal respiration type spring brake chamber, which comprises a cylinder seat, a front shell and a rear shell which are hermetically assembled on the front side and the rear side of the cylinder seat, a diaphragm, a front supporting spring and a push rod which are assembled in the front shell, and a piston, a rear supporting spring and a guide cylinder which are assembled in the rear shell. The diaphragm is fixed between the front shell and the rear shell, the push rod is assembled in the front shell and is abutted against the diaphragm, the front supporting spring is abutted against the front shell and the push rod, the piston is assembled in the rear shell, the guide cylinder is fixedly connected to the piston and is slidably inserted into the cylinder seat, and the rear supporting spring is abutted against the piston and the rear shell; the air guide through groove is formed in the push rod, the front side hole is formed in the side wall of the push rod, the air guide through pipe assembled in the air guide through groove is fixedly connected to the front end of the guide cylinder, and the assembling through hole is formed in the rear end of the guide cylinder. The utility model can effectively prevent external dust and water vapor from entering the brake chamber, realizes effective isolation of the brake chamber from the external environment, and has the advantages of simple structure of parts and convenience in assembly and maintenance.

Description

Internal respiration type spring brake air chamber

Technical Field

The utility model relates to the technical field of automobile braking, in particular to an internal respiration type spring braking air chamber.

Background

The spring brake chamber is a device for an automobile brake system, and consists of a chamber and compressed air, wherein the braking is realized by controlling the pressure in the chamber, the braking effect is eliminated by spring return, and the brake shoe or the brake disc is pushed to be contacted with the wheel by the compressed air, so that the braking of the automobile is realized. Such braking is common in large commercial vehicles and heavy machinery. The brake has the characteristics of large braking force, sensitive braking, high reliability and the like, and can effectively ensure the safety and stability of the vehicle during braking.

In order to avoid that water vapor and dust existing in the external environment in the driving and parking processes enter the air chamber, the operation stability of each part is affected, the service life of the spring brake air chamber is guaranteed, the inner breathing type dark yellow brake air chamber is gradually popularized, and the air chamber is sealed with the external environment, so that the external dust and water vapor can be effectively prevented from entering the air chamber.

In the technical schemes existing or disclosed in the market at present, a front air chamber for service braking is provided with an air vent which is communicated with the external environment, so that the air in a push rod cavity of the front air chamber is discharged outwards during service braking, and further, the push rod is pushed outwards to achieve a braking effect.

In addition, the front chamber and the rear chamber of the traditional internal respiration type spring brake air chamber are linked through the guide cylinder and the one-way valve assembled in the guide cylinder, so that the front chamber and the rear chamber are communicated and linked, and the push rod of the guide cylinder acting on the front chamber can be stretched out to realize a braking effect when parking braking, but the scheme is complex in structure, various in parts and various in inconvenience exist in the assembly process.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model aims to provide the internal respiration type spring brake air chamber which can effectively prevent external dust and water vapor from entering the brake air chamber, realize effective isolation of the brake air chamber from the external environment and has the advantages of simple structure of parts and convenience in assembly and maintenance.

The technical scheme adopted by the utility model for achieving the purpose is as follows: an internal respiration type spring brake air chamber comprises a cylinder seat, a front shell and a rear shell which are assembled on the front side and the rear side of the cylinder seat in a sealing mode, a diaphragm, a front supporting spring and a push rod which are assembled in the front shell, and a piston, a rear supporting spring and a guide cylinder which are assembled in the rear shell.

The edge of the diaphragm is fixed between the front shell and the rear shell, the push rod is slidably assembled at the axis of the front shell and is kept in abutting connection with the center of the diaphragm, the front supporting spring is arranged on the periphery of the push rod, two ends of the front supporting spring are respectively abutted with the front shell and the push rod, the piston is slidably assembled in the rear shell, the guide cylinder is fixedly connected to the axis of the piston and is slidably inserted into the cylinder seat, and the rear supporting spring is arranged on the periphery of the guide cylinder, and two ends of the rear supporting spring are respectively abutted with the piston and the rear shell.

The air guide through groove is formed in the axis of the push rod, a front side hole communicated with the air guide through groove is formed in the side wall of the push rod, an air guide through pipe assembled in the air guide through groove is fixedly connected to the front end of the guide cylinder, the air guide through pipe is communicated with the inner cavity of the guide cylinder, and an assembling through hole which is arranged behind the piston and communicated with the inner cavity is formed in the rear end of the guide cylinder.

In some implementations, in order to ensure that the front shell, the rear shell and the diaphragm are stably assembled on the cylinder seat and realize the sealing effect of the front air chamber and the rear air chamber, the inner breathing type spring brake air chamber is ensured to be stably assembled on the frame and matched with the brake to operate, and the following technical scheme is provided.

The outer edges of the front end and the rear end of the cylinder seat are fixedly connected with wing rings which are arranged in an everting manner, the front shell, the diaphragm and the wing rings on the front side of the cylinder seat are fixedly clamped through a front clamping hoop, the front side of the front shell is fixedly provided with an assembly bolt, and the rear shell is sleeved on the periphery of the wing rings on the rear side of the cylinder seat and is fixed to the cylinder seat through a rear clamping hoop.

In some implementations, in order to ensure that the push rod can be assembled in a sealing manner in a telescopic sliding mode in the front shell, ensure that the push rod is stably abutted with the diaphragm and realize stable assembly of the front supporting spring, the following technical scheme is provided.

The front telescopic through hole is formed in the axis of the front shell, the push rod penetrates through the front telescopic through hole, a front sealing rubber ring which is in sealing fit with the push rod is nested in the front telescopic through hole, an elastic dust cover is assembled on the outer side of the front shell, two ends of the elastic dust cover are respectively in sealing connection with the front shell and the push rod, a push disc which is in abutting connection with the membrane is fixedly connected to the rear side end of the push rod, and the front supporting spring is in abutting connection with the push disc.

In some implementations, in order to ensure that the guide cylinder is assembled in a sealing manner at the axis of the cylinder seat in a telescopic sliding manner, ensure that the piston slides in a sealing manner in the rear cylinder body and ensure that the rear supporting spring is assembled stably, the following technical scheme is provided.

The cylinder seat is characterized in that a rear telescopic through hole is formed in the axis of the cylinder seat, the guide cylinder penetrates through the rear telescopic through hole, a rear sealing rubber ring which is in sealing fit with the guide cylinder is nested in the rear telescopic through hole, a cushion seat is arranged on the inner side of the rear shell, the rear supporting spring is in abutting joint with the cushion seat, and a sealing gasket which is in sealing fit with the inner wall of the rear shell is sleeved on the outer edge of the piston.

In some implementations, in order to facilitate the braking effect of parking when the vehicle is towed behind the middle section of the power system, the following technical scheme is provided.

The rear shell is also provided with a brake release assembly, the brake release assembly comprises a sliding seat, a rotating seat, a threaded rod and a limiting seat, the rotating seat, the threaded rod and the limiting seat are fixedly connected with the axis in sequence, the rotating seat is rotatably arranged at the axes of the pad seat and the rear shell, the threaded rod and the limiting seat are arranged in the inner cavity of the guide cylinder, and the sliding seat is slidably arranged in the inner cavity of the guide cylinder and is in rotary connection with the threaded rod.

In some implementations, on the premise of assembling the brake release assembly, in order to facilitate air in the brake chamber to enter the breathing chamber through the brake release assembly or to realize reverse flow of air along the path, the following technical scheme is provided.

The air guide device comprises a limit seat, a threaded rod, a vent hole, a rotary seat and a rear side hole, wherein the vent hole is formed in the axis of the limit seat and the axis of the threaded rod and is opposite to the air guide tube, and the rotary seat is internally provided with a rear side hole for communicating an air hole and a rear shell.

The utility model has the beneficial effects that: in the utility model, the brake cavity is communicated with the breathing cavity, and gas is pressed and transferred in the brake cavity and the breathing cavity in the automobile braking and driving processes, so that the complete isolation from the external environment is realized, the effective isolation between the brake air chamber and the external environment is realized, and the entry of external dust and water vapor into the brake air chamber can be effectively avoided. According to the utility model, through improving the guide cylinder, the push rod and the brake release assembly, when parking brake, service brake and normal running are switched, the breathing cavity can be linked with the brake cavity through the internal passage, so that the design requirement of internal breathing is further realized, each part has a simple structure, and the related one-way valve, the reset spring and the like are not required to be additionally arranged, so that the device has the advantages of convenience in assembly and maintenance.

Drawings

FIG. 1 is a schematic view of the appearance structure of the present utility model;

FIG. 2 is a schematic view of an external structure according to another aspect of the present utility model;

FIG. 3 is a schematic view of the structure of the present utility model in a disassembled state;

FIG. 4 is a schematic structural view of the front housing;

FIG. 5 is a schematic view of the cylinder block;

FIG. 6 is a schematic view of the piston and its assembly components;

FIG. 7 is a schematic cross-sectional view of the present utility model;

figure 8 is a schematic illustration of the structure in a sectioned state of the components involved for communicating with the brake chamber and the breathing chamber.

In the figure: 11 cylinder seat, 111 wing ring, 112 air inlet port, 113 exhaust port, 114 rear telescopic through hole, 115 rear sealing rubber ring, 12 front shell, 121 front telescopic through hole, 122 front sealing rubber ring, 123 elastic dust cover, 124 assembling bolt, 13 rear shell, 131 pad seat, 141 brake cavity, 142 ventilation cavity, 151 pressure storage cavity, 152 breathing cavity, 161 front clamp, 162 rear clamp, 21 diaphragm, 22 front supporting spring, 23 push rod, 231 air guide through groove, 232 front side hole, 233 push disc, 31 piston, 311 sealing washer, 32 rear supporting spring, 33 guide cylinder, 331 air guide through pipe, 332 assembling through hole, 333 guide seat, 334 communication hole, 41 sliding seat, 42 rotating seat, 43 threaded rod, 44 limit seat, 45 vent hole, 46 rear side hole.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Referring to fig. 1-8, an internal breathing spring brake chamber includes a cylinder seat 11, a front housing 12 and a rear housing 13 which are hermetically assembled on the front and rear sides of the cylinder seat 11, a diaphragm 21, a front support spring 22 and a push rod 23 which are assembled in the front housing 12, and a piston 31, a rear support spring 32 and a guide cylinder 33 which are assembled in the rear housing 13.

The edge of the diaphragm 21 is fixed between the front shell 12 and the rear shell 13, the push rod 23 is slidably assembled at the axle center of the front shell 12 and is kept in abutting contact with the center of the diaphragm 21, the front support spring 22 is arranged at the periphery of the push rod 23, two ends of the front support spring are respectively abutted with the front shell 12 and the push rod 23, the piston 31 is slidably assembled in the rear shell 13, the guide cylinder 33 is fixedly connected to the axle center of the piston 31 and is slidably inserted into the cylinder seat 11, and the rear support spring 32 is arranged at the periphery of the guide cylinder 33, and two ends of the rear support spring are respectively abutted with the piston 31 and the rear shell 13.

The axial center of the push rod 23 is provided with an air guide through groove 231, the side wall of the push rod 23 is provided with a front side hole 232 communicated with the air guide through groove 231, the front end of the guide cylinder 33 is fixedly connected with an air guide through pipe 331 assembled in the air guide through groove 231, the air guide through pipe 331 is communicated with the inner cavity of the guide cylinder 33, and the rear end of the guide cylinder 33 is provided with an assembling through hole 332 which is arranged behind the piston 31 and communicated with the inner cavity.

A front air chamber is formed between the front housing 12 and the cylinder block 11 so that the diaphragm 21, the front support spring 22, and the push rod 23 are stably assembled in the front air chamber, and a rear air chamber is formed between the rear housing 13 and the cylinder block 11 so that the piston 31, the rear support spring 32, and the guide cylinder 33 are stably assembled in the rear air chamber. In the front air chamber, the front side of the diaphragm 21 forms a braking chamber 141 with the front housing 12, while the rear side of the diaphragm 21 forms a ventilation chamber 142 with the cylinder block 11, and in the rear air chamber, the front side of the piston 31 forms a pressure storage chamber 151 with the rear housing 13, the cylinder block 11, and the rear side of the piston 31 forms a breathing chamber 152 with the rear housing 13.

In the normal running stage of the automobile, the brake chamber 141 and the breathing chamber 152 are both in a normal pressure state, and the pressure storage chamber 151 is filled with compressed gas to drive the piston 31 to move to one side of the breathing chamber 152.

During service braking, compressed gas is filled into the ventilation chamber 142 after the brake pedal is depressed, so as to push the diaphragm 21 to turn over to one side of the brake chamber 141, and further drive the push rod 23 to extend out of the front housing 12 to realize service braking, in this process, the front supporting spring 22 is compressed and stores elastic potential energy, while air in the brake chamber 141 is filled into the breathing chamber 152 through the front side hole 232, the air guide ventilation groove 231, the air guide ventilation tube 331 and the inner cavity of the guide cylinder 33, and the air pressure of the breathing chamber 152 is increased without driving the piston 31 and the guide cylinder 33 to change obviously due to the compressed gas filled in the pressure storage chamber 151.

When the service braking is canceled, when the compressed gas in the ventilation cavity 142 is discharged after the brake pedal is not stepped on, the front supporting spring 22 can release elastic potential energy and push the push rod 23 to shrink towards the inner side of the front air chamber, so as to drive the diaphragm 21 to reset, and as the volume of the braking cavity 141 is increased, part of air in the breathing cavity 152 can enter the braking cavity 141 from the inner cavity of the guide cylinder 33, the air guide through pipe 331, the air guide through groove 231 and the front side hole 232, so that the air pressure balance between the braking cavity 141 and the breathing cavity 152 is realized by supplementing air to the braking cavity 141.

In order to ensure that the front hole 232 is always located inside the front air chamber during the telescopic sliding of the push rod 23 on the front housing 12, the front hole 232 is provided on the side of the push rod 23 close to the diaphragm 21 based on this.

In the parking braking process, when the hand brake is pulled up to enable compressed gas in the control pressure storage cavity 151 to be discharged, the air pressure in the pressure storage cavity 151 is reduced, the compressed rear supporting spring 32 releases elastic potential energy and pushes the piston 31 to move towards the pressure storage side, and further the diaphragm 21 is pushed to move towards the braking cavity 141 side by the guide cylinder 33, so that the push rod 23 extends outwards to achieve the parking braking. In the process, the volume of the brake chamber 141 is reduced, wherein air enters the breathing chamber 152 through the front side hole 232, the air guide through groove 231, the air guide through pipe 331 and the inner cavity of the guide cylinder 33 to supplement the air to the breathing chamber 152 with increased volume.

When the parking brake is canceled, the hand brake is controlled to be put down so that compressed gas is filled into the pressure storage cavity 151, thereby pushing the piston 31 to move towards the breathing cavity 152 side, further enabling the rear supporting spring 32 to shrink and store elastic potential energy again, redundant air in the breathing cavity 152 with reduced volume is refilled into the brake cavity 141 through the inner cavity of the guide cylinder 33, the air guide tube 331, the front side hole 232, and the push rod 23 and the diaphragm 21 are driven to move towards the ventilation cavity 142 side under the action of the front supporting spring 22 to realize resetting, and the parking brake effect is canceled.

In order to ensure that air in the brake cavity 141 can enter the air guide tube 331 through the front side hole 232 and the air guide through groove 231, a guide seat is fixedly connected to the end part of the air guide tube 331, and a communication hole 334 for communicating the air guide through groove 231 and the air guide tube 331 is formed in the guide seat.

In order to ensure that the front shell 12, the rear shell 13 and the diaphragm 21 are stably assembled on the cylinder seat 11 and realize the sealing effect of the front air chamber and the rear air chamber, the inner breathing type spring brake air chamber is ensured to be stably assembled on the frame and matched with a brake to operate, and the following technical scheme is provided.

The outer edges of the front end and the rear end of the cylinder seat 11 are fixedly connected with wing rings which are arranged in an everting manner, the front shell 12, the diaphragm 21 and the wing rings on the front side of the cylinder seat 11 are fixedly clamped through a front clamp 161, the front side of the front shell 12 is fixedly provided with an assembly bolt 124, and the rear shell 13 is sleeved on the periphery of the wing rings on the rear side of the cylinder seat 11 and is fixed to the cylinder seat 11 through a rear clamp 162.

The arrangement of the wing rings can ensure that the front shell 12, the membrane 21 and the rear shell 13 are stably assembled on the cylinder seat 11 under the action of the front clamp 161 and the rear clamp 162 and realize the sealing effect of the front air chamber and the rear air chamber, and the arrangement of the assembling bolts 124 can ensure that one side of the front shell 12 is stably assembled on the frame, so that the push rod 23 and the brake are linked.

An air inlet 112 and an air outlet 113 are formed on the cylinder seat 11, the air inlet 112 is communicated to one side of the ventilation cavity 142, and the air outlet 113 is communicated to one side of the pressure storage cavity 151, so that the normal charging and discharging of compressed gas are ensured.

In order to ensure that the push rod 23 can be assembled in a sealing manner in the front housing 12 in a telescopic sliding manner, to ensure a stable abutment of the push rod 23 with the membrane 21 and to achieve a stable assembly of the front support spring 22, the following technical scheme is provided.

The axle center department of preceding casing 12 has seted up preceding flexible through-hole 121, and push rod 23 runs through preceding flexible through-hole 121 and arranges, and the nested front seal rubber ring 122 that keeps sealed laminating with push rod 23 that installs in preceding flexible through-hole 121, the outside of preceding casing 12 is equipped with elasticity dust cover 123, and elasticity dust cover 123 both ends respectively keep sealed connection with preceding casing 12, push rod 23, the rear side end of push rod 23 is fixed firmly and is kept the push away dish 233 of butt with diaphragm 21, preceding supporting spring 22 keeps the butt with push away dish 233.

The front telescopic through hole 121 ensures that the push rod 23 is stably assembled in the front shell 12, the arrangement of the front sealing rubber ring 122 can prevent air in the brake cavity 141 from leaking from the front telescopic through hole 121, dust and air in the external environment are prevented from entering the brake cavity 141 from the front telescopic through hole, the elastic dust cover 123 can further prevent dust and water vapor in the external environment from adhering to the push rod 23 and entering the brake cavity 141, the front supporting spring 22 and the push rod 23 are ensured to be stably assembled in a combined mode, and the contact area between the push rod 23 and the diaphragm 21 can be increased by the arrangement of the push disc 233, so that the stable realization of a brake function is ensured.

In order to ensure that the guide cylinder 33 is assembled in a sealing manner in a telescopic sliding manner at the axial center of the cylinder seat 11, and that the piston 31 slides in a sealing manner in the rear cylinder body, and that the rear support spring 32 is assembled stably, the following technical scheme is provided.

The center of the cylinder seat 11 is provided with a rear telescopic through hole 114, the guide cylinder 33 penetrates through the rear telescopic through hole 114, a rear sealing rubber ring 115 which is in sealing fit with the guide cylinder 33 is nested in the rear telescopic through hole 114, the inner side of the rear shell 13 is provided with a cushion seat 131, the rear supporting spring 32 is in abutting connection with the cushion seat 131, and the outer edge of the piston 31 is sleeved with a sealing gasket 311 which is in sealing fit with the inner wall of the rear shell 13.

The rear telescopic through hole 114 ensures that the guide cylinder 33 is stably assembled in the cylinder seat 11, the rear sealing rubber ring 115 can prevent the ventilation cavity 142 and the pressure storage cavity 151 from leaking, and the sealing gasket 311 can ensure that the piston 31 stably slides in the rear housing 13 and simultaneously realize the sealing of the pressure storage cavity 151 and the breathing cavity 152. The cushion seat 131 can improve the strength of the rear end of the rear housing 13, and the support spring and the rear housing 13 can be stably assembled by means of the support assembly of the rear support spring 32 on the cushion seat 131.

In order to facilitate the braking effect cancellation of the parking brake when the vehicle is towed after the middle section of the power system and the electric power system, the following technical scheme is provided.

The rear housing 13 is also provided with a brake release assembly, the brake release assembly comprises a sliding seat 41, a rotating seat 42, a threaded rod 43 and a limiting seat 44, wherein the rotating seat 42, the threaded rod 43 and the limiting seat 44 are fixedly connected with the axle center in sequence, the rotating seat 42 is rotatably arranged at the axle centers of the cushion seat 131 and the rear housing 13, the threaded rod 43 and the limiting seat 44 are arranged in the inner cavity of the guide cylinder 33, and the sliding seat 41 is slidably arranged in the inner cavity of the guide cylinder 33 and is in rotary connection with the threaded rod 43.

The inner cavity of the guide cylinder 33 is arranged in a hexagonal groove, the sliding seat 41 is arranged in a hexagonal column mode, the sliding seat 41 can slide stably in the inner cavity of the guide cylinder 33, the hexagonal column is arranged on the outer side of the rotating seat 42, the rotating seat 42 is convenient to screw to drive the threaded rod 43 to rotate stably, the sliding seat 41 is driven to slide stably in the inner cavity of the guide cylinder 33, and the limiting seat 44 can ensure that the sliding seat 41 is connected with the threaded rod 43 in a screwing mode.

When the parking brake is triggered, the piston 31 and the guide cylinder 33 move towards the ventilation cavity 142, while the sliding seat 41 is positioned at the assembling port 332 of the guide cylinder 33, after the middle section of the power system and the electric power system, the rotary seat 42 and the threaded rod 43 can be operated to rotate so as to facilitate the dragging of the vehicle, and then the sliding seat 41 is driven to move towards the breathing cavity 152, at the moment, the sliding seat 41 is abutted with the assembling port 332, and then the guide cylinder 33 and the piston 31 are driven to move towards the breathing cavity 152, so that the cancellation of the parking brake is realized.

On the premise of assembling the brake release assembly, in order to facilitate air in the brake chamber 141 to enter the breathing chamber 152 through the brake release assembly or to realize reverse flow of air along the path, the following technical scheme is provided.

The limiting seat 44 and the axis of the threaded rod 43 are provided with vent holes 45 which are arranged opposite to the air guide tube 331, and the rotating seat 42 is provided with rear side holes 46 for communicating air holes and the rear shell 13.

The rear side hole 46 is used for communicating the vent hole 45 and the breathing cavity 152, so that the breathing cavity 152 and the braking cavity 141 are communicated with each other through the front side hole 232, the air guide through groove 231, the communication hole 334, the air guide through pipe 331, the inner cavity of the guide cylinder 33, the vent hole 45 and the rear side hole 46.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. An internal breathing spring brake chamber, characterized by: the device comprises a cylinder seat (11), a front shell (12) and a rear shell (13) which are assembled on the front side and the rear side of the cylinder seat (11) in a sealing manner, a diaphragm (21), a front supporting spring (22) and a push rod (23) which are assembled in the front shell (12), and a piston (31), a rear supporting spring (32) and a guide cylinder (33) which are assembled in the rear shell (13), wherein the edge of the diaphragm (21) is fixed between the front shell (12) and the rear shell (13), the push rod (23) is assembled at the axial center of the front shell (12) in a sliding manner and is kept in abutting connection with the center of the diaphragm (21), the front supporting spring (22) is arranged at the periphery of the push rod (23) and the two ends of the front supporting spring are respectively in abutting connection with the front shell (12) and the push rod (23), the piston (31) is assembled in the rear shell (13), the guide cylinder (33) is fixedly connected to the axial center of the piston (31) in a sliding manner and is inserted in the cylinder seat (11), and the rear supporting spring (32) is arranged at the periphery of the guide cylinder (33) and the two ends of the guide cylinder (31) are respectively in abutting connection with the rear shell (13). The utility model discloses a piston, including push rod (23), guide tube (331) and guide tube (33) inner chamber keep intercommunication, guide tube (33) rear end has been seted up and has been arranged in piston (31) rear and with inner chamber intercommunication's assembly opening (332) are offered on push rod (23) axle center department has been offered air guide through groove (231), and offer on push rod (23) lateral wall with air guide through groove (231) keep the preceding side opening (232) of intercommunication, the front end rigid coupling of guide tube (33) has the air guide through tube (331) of assembly in air guide through groove (231).

2. An internal breathing spring brake chamber as claimed in claim 1, wherein: the front and rear end outer edges of the cylinder seat (11) are fixedly connected with wing rings which are arranged in an everting mode, the front shell (12), the diaphragm (21) and the wing rings on the front side of the cylinder seat (11) are fixedly clamped through a front clamp (161), the front side of the front shell (12) is fixedly provided with an assembly bolt (124), and the rear shell (13) is sleeved on the periphery of the wing rings on the rear side of the cylinder seat (11) and is fixed to the cylinder seat (11) through a rear clamp (162).

3. An internal breathing spring brake chamber as claimed in claim 1, wherein: the utility model discloses a flexible push plate, including flexible push plate (233), diaphragm (21), front housing (12), push rod (23), flexible through-hole (121) before having seted up in the axle center department of front housing (12), push rod (23) run through flexible through-hole (121) and arrange, and nested install in flexible through-hole (121) before with push rod (23) keep sealed laminating seal rubber ring (122), the outside of front housing (12) is equipped with elasticity dust cover (123), and elasticity dust cover (123) both ends keep sealing connection with front housing (12), push rod (23) respectively, the rear side end of push rod (23) fixedly connected with push plate (233) of diaphragm (21) keep the butt, preceding supporting spring (22) keeps the butt with push plate (233).

4. An internal breathing spring brake chamber as claimed in claim 1, wherein: the novel telescopic cylinder is characterized in that a rear telescopic through hole (114) is formed in the axis of the cylinder seat (11), the guide cylinder (33) penetrates through the rear telescopic through hole (114) to be arranged, a rear sealing rubber ring (115) which is in sealing fit with the guide cylinder (33) is nested and installed in the rear telescopic through hole (114), a cushion seat (131) is arranged on the inner side of the rear shell (13), the rear supporting spring (32) is in contact with the cushion seat (131), and a sealing gasket (311) which is in sealing fit with the inner wall of the rear shell (13) is sleeved on the outer edge of the piston (31).

5. An internal breathing spring brake chamber as defined in claim 4, wherein: the rear shell (13) is also provided with a brake release assembly, the brake release assembly comprises a sliding seat (41), a rotating seat (42) for keeping the axis to be sequentially fixedly connected, a threaded rod (43) and a limiting seat (44), the rotating seat (42) is rotatably installed at the axes of the pad seat (131) and the rear shell (13), the threaded rod (43) and the limiting seat (44) are arranged in the inner cavity of the guide cylinder (33), and the sliding seat (41) is slidably installed in the inner cavity of the guide cylinder (33) and is kept in screwed connection with the threaded rod (43).

6. An internal breathing spring brake chamber as defined in claim 5, wherein: the air guide device is characterized in that vent holes (45) which are oppositely arranged with the air guide tube (331) are formed in the positions of the limiting seat (44) and the axis of the threaded rod (43), and rear side holes (46) which are used for communicating air holes and the rear shell (13) are formed in the rotating seat (42).