CN219639310U - Internal breather valve device for internal circulation of air in piston type brake chamber - Google Patents

Abstract

The utility model discloses an internal breather valve device for internal circulation of air of a piston type brake chamber, and aims to provide the internal breather valve device for internal circulation of air of the piston type brake chamber, which has the advantages of compact structure, convenience in assembly, reduction of failure probability, improvement of air tightness and service life of a system. The novel energy storage spring comprises a guide cylinder cap and a special-shaped sealing ring, wherein the special-shaped sealing ring is sleeved with the guide cylinder cap, the guide cylinder cap is arranged in the guide cylinder and is in threaded connection with the guide cylinder, the side surface of the upper end of the guide cylinder cap is in sealing connection with the inner wall of the upper end of the guide cylinder, a guide cylinder cap vent hole is formed in the guide cylinder cap, a guide cylinder vent hole is formed in the guide cylinder, and the guide cylinder is communicated with the energy storage spring cavity. The beneficial effects of the utility model are as follows: the arrangement among the device structures is compact; the structure is convenient for rapid and accurate assembly; negative pressure supplement, pressurization and efficient air pressure balance have efficient working efficiency; the sealing performance is high; the overall service life of the structure and the device is prolonged; the use safety is improved.

Description

Internal breather valve device for internal circulation of air in piston type brake chamber

Technical Field

The utility model relates to the technical field of automobile braking, in particular to an internal breather valve device for internal circulation of air in a piston type braking air chamber.

Background

The piston type spring brake air chamber is provided with a piston shaft tube in the cylinder body, an air hole is arranged at the rear part of the cylinder body, an energy storage spring is arranged on the piston shaft tube, the middle body divides the air chamber into a front air chamber and a rear air chamber, when the air chamber is exhausted, a breathing air pipe on the rear air chamber is communicated with the front air chamber, and redundant air is exhausted through the front air chamber. The brake chamber with the structure can often suck a large amount of impurities such as silt and water stain into the air chamber, is not easy to discharge, is easy to cause corrosion damage to the energy storage spring, the sealing ring and the like, is easy to cause economic loss, and can seriously have larger brake potential safety hazards to cause traffic accidents. The device comprises a gas conveying technology through a gas conveying pipe, and the gas conveying technology is required to be carried out through another gas conveying pipe in respiration, so that the overall complex structure of the device is increased, the device is unfavorable for being placed and assembled in a narrow installation space, each gas conveying pipe and other accessories form a braking principle, the working range is too large, the number of accessories is increased, the fault probability is increased, and the air tightness and the service life of the system are reduced.

In summary, the device has complicated structure, is not beneficial to assembly, increases the fault probability, and reduces the air tightness and the service life of the system.

Disclosure of Invention

The utility model provides the internal breather valve device for the internal circulation of the air of the piston type brake chamber, which has the advantages of compact structure, convenient assembly, reduced fault probability and prolonged service life of the system, and aims to overcome the defects of the prior art that the structure of the external breather system is complicated and complicated, the assembly is not convenient, the fault probability is increased, the air tightness is reduced, and the service life of the system is prolonged.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an interior breather valve device that piston brake chamber air internal circulation used, including cylinder and protecgulum, the internal connection has the well body between cylinder and the protecgulum, be equipped with driving pressureless chamber and driving chamber between well body and the protecgulum, be equipped with air inlet one on the well body and be linked together with driving chamber, be equipped with parking chamber and energy storage spring chamber between well body and the cylinder, be equipped with air inlet two on the well body and be linked together with the parking chamber, be equipped with the diaphragm between driving pressureless chamber and the driving chamber, diaphragm fixed mounting is between well body and protecgulum, be equipped with the piston between parking chamber and the energy storage spring chamber, piston and cylinder sliding connection, be equipped with the guide cylinder in the parking chamber, the one end and the well body sliding connection of guide cylinder, be connected with the water conservancy diversion structure in the guide cylinder, the other end and piston connection of guide cylinder, the water conservancy diversion structure includes the guide cylinder cap, special seal circle is connected with the guide cylinder cap cover, the guide cylinder cap is arranged in the guide cylinder and is connected with guide cylinder threaded connection, the upper end side of guide cylinder cap and the upper end inner wall sealing connection of guide cylinder cap, be equipped with the guide cylinder cap air vent, be equipped with the guide cylinder vent on the guide cylinder cap, guide cylinder is linked together with energy storage spring chamber.

In the air chamber, separate cylinder and protecgulum into two cavities through the well body, form driving pressureless chamber and driving chamber between well body and the protecgulum, separate through the diaphragm between driving pressureless chamber and the driving chamber, form parking chamber and energy storage spring chamber between well body and the cylinder, the piston separates energy storage spring chamber and parking chamber into two cavitys. The non-pressure cavity of the travelling crane is internally connected with a return spring, the return spring is connected with a push rod and a shifting fork, the push rod is pushed and pulled by the return spring to extend out of the combined shifting fork to brake the automobile, and the release of braking is realized by the retraction of the push rod. The diaphragm has elasticity, and then realizes the shrink of return spring through the deformation of diaphragm towards return spring, realizes the diaphragm to the deformation of the other end by the elasticity of return spring again. The energy storage spring cavity is connected with an energy storage spring, the energy storage spring realizes the back and forth sliding of the piston in the parking cavity, meanwhile, one end of a guide cylinder is connected to the piston, and the other end of the guide cylinder is inserted into the middle body and opposite to the diaphragm. The guide cylinder cap is connected with the guide cylinder at the port of one end of the middle body in a threaded manner, so that the assembly is convenient; the special-shaped sealing ring is sleeved on the guide cylinder cap, the inner side edge of the special-shaped sealing ring is arranged on the side, which is attached to the guide cylinder cap, of the special-shaped sealing ring, the outer side edge of the special-shaped sealing ring is attached to the guide cylinder wall, the guide cylinder is provided with a guide cylinder vent hole, the guide cylinder cap is provided with a guide cylinder cap vent hole, the special-shaped sealing ring is sleeved on the same horizontal height of the guide cylinder cap vent hole and is staggered with the height of the guide cylinder vent hole, and the special-shaped sealing ring is used for sealing the guide cylinder cap vent hole: 1. when the parking brake is carried out, the parking handle is braked, the special-shaped sealing ring is in a non-stressed state, and the driving cavity and the energy storage spring cavity are communicated with a gap between the guide cylinder and the wall of the guide cylinder cap, a gap between the guide cylinder and the guide cylinder cap and a vent hole between the guide cylinder cap through the guide cylinder and the vent hole of the guide cylinder, so that the negative pressure state in the energy storage spring cavity is eliminated; 2. when the parking brake is released and the hand brake is released and the foot brake is operated, the air in the driving cavity is fed, the air in the driving cavity enters the gap between the guide cylinder and the guide cylinder cap through the guide cylinder vent hole, the air in the gap applies pressure to the special-shaped sealing ring to deform, the inner side edge of the special-shaped sealing ring presses the surface of the guide cylinder cap to seal the guide cylinder cap vent hole, the other outer side edge presses the guide cylinder wall to seal the guide cylinder cavity, the air in the guide cylinder cavity is further cut off from the gap between the guide cylinder and the guide cylinder cap, and the energy storage spring cavity is not communicated with external air, so that the braking state is maintained; 3. releasing the parking brake to release the hand brake: the parking cavity is used for air intake, air pressure enables the piston and the guide cylinder to retreat by the retreating shifting fork, the energy storage spring is compressed, and the pressure in the energy storage spring cavity is gradually converted into supercharging; 4. loosening a foot brake: the air of driving chamber is arranged outward, loosens promptly and is exerted pressure to abnormal shape sealing washer, and on the other hand makes abnormal shape sealing washer by the reverse flushing owing to energy storage spring chamber pressure boost: the pressurized gas flows into the inner cavity of the guide cylinder, the vent hole of the guide cylinder cap, the special-shaped sealing ring and the gap between the inner side edge of the special-shaped sealing ring and the wall of the guide cylinder cap from the powerful spring cavity, and is internally flushed out of the gap, the gap between the guide cylinder and the guide cylinder cap, the vent hole of the guide cylinder and the travelling cavity and discharged together, so that the pressurization in the energy storage spring cavity is eliminated. The negative pressure in the energy storage spring cavity can be supplemented and pressurized under the opening and closing actions of the special-shaped sealing ring through the actions of the guide cylinder cap vent hole, the guide cylinder vent hole and the special-shaped sealing ring, and the effects of compact structure, convenience in assembly, high sealing performance, high-efficiency air pressure balance and service life improvement are achieved.

Preferably, the special-shaped sealing ring is connected with a lip edge I and a lip edge II, the lip edge I is arranged on one side close to the guide cylinder cap and corresponds to the guide cylinder cap vent hole, the lip edge II is arranged on one side close to the guide cylinder and below the guide cylinder vent hole, and a gap between the lip edge I and the lip edge II is a pneumatic groove. The two sides of one end of the special-shaped sealing ring comprise a lip edge I and a lip edge II, the lip edge I is close to the vent hole of the guide cylinder cap, and can realize outward compaction and sealing, loosening and inward punching opening of the vent hole, the lip edge II is close to the inner wall of the guide cylinder, and can realize compaction and loosening of the inner wall of the guide cylinder, so that the inner wall of the guide cylinder is sealed or circulated, a concave gap between the lip edge I and the lip edge II is set as an air pressure groove, the air pressure groove is arranged at one end facing the vent hole of the guide cylinder, and the end surface of the special-shaped sealing ring generates pressure according to pressure difference, so that efficient air pressure balance is realized.

Preferably, the special-shaped sealing ring is connected with a lock catch, the guide cylinder cap is provided with a limit clamping groove, and the special-shaped sealing ring is buckled with the guide cylinder cap through the matching of the lock catch and the limit clamping groove. The outer surface of the guide cylinder cap is provided with a concave limiting clamping groove, the upper part of the special-shaped sealing ring is connected with a lock catch, and the lock catch protrudes out of the end surface of the special-shaped sealing ring, so that the special-shaped sealing ring is in scarf joint with the limiting clamping groove, thereby being convenient for assembling the special-shaped sealing ring and the guide cylinder cap and preventing reverse assembling.

Preferably, the cylinder barrel is provided with a jack, a release bolt is arranged in the jack, and the release bolt is in threaded connection with the jack. When the pressure in the braking system is lost, the piston can be pulled back to release the braking by rotating the release bolt, so that the operability is improved and emergency measures are provided.

Preferably, the upper end of the guide cylinder cap is connected with a limiting convex ring, the limiting convex ring and the guide cylinder cap are integrally formed, and the limiting convex ring is attached to the upper end face of the guide cylinder. The diameter of the limiting convex ring is larger than that of the guide cylinder, so that the connection position of the guide cylinder cap and the guide cylinder can be conveniently limited in a positioning way when the guide cylinder cap is connected through threads.

Preferably, the guide structure further comprises an O-shaped sealing ring, the O-shaped sealing ring is sleeved with the guide cylinder cap, the guide cylinder cap is in sealing connection with the guide cylinder through the O-shaped sealing ring, a limiting groove is formed in the outer side of the guide cylinder cap, the O-shaped sealing ring is sleeved with the limiting groove, external threads are formed in the lower surface of the outer side of the guide cylinder cap, internal threads are formed in the inner side wall of the guide cylinder, the guide cylinder cap is in threaded connection with the guide cylinder through the matching of the external threads and the internal threads, and the O-shaped sealing ring, the guide cylinder cap vent hole and the guide cylinder vent hole are all arranged between the limiting groove and the external threads. The guide cylinder cap is sleeved with the O-shaped sealing ring, the O-shaped sealing ring is close to the guide cylinder port, so that the air tightness of the inner cavity of the guide cylinder is improved, gap air flow when the guide cylinder is connected with the guide cylinder cap is prevented from being discharged from the connection part of the guide cylinder cap and the guide cylinder, and the air tightness of the structure is improved. The surface of the guide cylinder cap is provided with the concave limit groove, so that the O-shaped seal ring can be partially clamped into the limit groove when the O-shaped seal ring is sleeved, the O-shaped seal ring is prevented from moving and deforming when the guide cylinder cap is assembled with the guide cylinder in a threaded connection manner, and the compactness and stability of the structure assembly are improved.

Preferably, the upper end face of the guide cylinder cap is provided with a guide cylinder cap end face vent hole II, and the position of the guide cylinder cap end face vent hole II corresponds to the position of the air pressure groove on the special-shaped sealing ring in an up-down mode. The second air vent on the end face of the guide cylinder cap is arranged in the upper end face of the guide cylinder cap and is communicated with the driving cavity, so that the air flow exchange efficiency is increased when the first air inlet pressing lip edge and the first air flushing lip edge are used for discharging air, and the air pressure balance effect is further improved.

The beneficial effects of the utility model are as follows: the arrangement among the device structures is compact; the structure is convenient for rapid and accurate assembly; negative pressure supplement, pressurization and efficient air pressure balance have efficient working efficiency; the sealing performance is high; the overall service life of the structure and the device is prolonged; the use safety is improved.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a schematic structural view of a guide cap of embodiment 1;

FIG. 5 is a cross-sectional view of the guide cap of example 1 (with O-ring seal attached);

FIG. 6 is a schematic structural view of a guide cap of embodiment 2;

fig. 7 is a sectional view of the guide cap of example 2.

In the figure: 1. the hydraulic engine comprises a cylinder barrel, a middle body, a driving non-pressure cavity, a driving cavity, a first air inlet, a parking cavity, a 7 energy storage spring cavity, a second air inlet, a 9 diaphragm, a 10 piston, a 11 guide cylinder, a 12 guide structure, a 13 release bolt, a 14 guide cylinder cap, a 15 special-shaped sealing ring, a 16O-shaped sealing ring, a 17 guide cylinder cap vent hole, a 18 guide cylinder vent hole, a 19 lock catch, a 20 mounting hole, a 21 limit groove, a 22 limit clamping groove, a 23 lip I, a 24 lip II, a 25 air pressure groove, a 26 jack, a 27 limit convex ring, a 28 push rod, a 29, a shifting fork, a 30 return spring, a 31 energy storage spring, a 32 front cover and a 33 guide cylinder cap end face vent hole II.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be otherwise oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, processes and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

Example 1:

as shown in fig. 1-3, an internal breather valve device for air internal circulation of a piston brake chamber comprises a cylinder 1 and a front cover 32, a middle body 2 is connected between the cylinder 1 and the front cover 32, a driving non-pressure cavity 3 and a driving cavity 4 are arranged between the middle body 2 and the front cover 32, a first air inlet 5 is arranged on the middle body 2 and is communicated with the driving cavity 4, a parking cavity 6 and an energy storage spring cavity 7 are arranged between the middle body 2 and the cylinder 1, an air inlet 8 is arranged on the middle body 2 and is communicated with the parking cavity 6, a diaphragm 9 is arranged between the driving non-pressure cavity 3 and the driving cavity 4, the diaphragm 9 is fixedly arranged between the middle body 2 and the front cover 32, a piston 10 is arranged between the parking cavity 6 and the energy storage spring cavity 7, the piston 10 is in sliding connection with the cylinder 1, a guide cylinder 11 is arranged in the parking cavity 6, one end of the guide cylinder 11 is in sliding connection with the middle body 2, a guide structure 12 is connected with the guide cylinder 11, the other end of the guide cylinder 11 is connected with the piston 10, the guide structure 12 comprises a guide cylinder cap 14 and a special-shaped sealing ring 15, the guide cylinder cap 14 is arranged in the guide cylinder 11 and is connected with the guide cap 11, the upper side surface of the guide cylinder cap 14 is connected with the guide cylinder 11, the guide cylinder cap is provided with the upper end of the guide cylinder 11, and the guide cylinder 11 is connected with the air vent hole 17.

As shown in fig. 3-5, the special-shaped sealing ring 15 is connected with a lip edge one 23 and a lip edge two 24, the lip edge one 23 is arranged on one side close to the guide cylinder cap 14 and corresponds to the guide cylinder cap vent hole 17, the lip edge two 24 is arranged on one side close to the guide cylinder and below the guide cylinder vent hole 18, and a gap between the lip edge one 23 and the lip edge two 24 is set as an air pressure groove 25. The special-shaped sealing ring 15 is connected with a lock catch 19, the guide cylinder cap 14 is provided with a limit clamping groove 22, and the special-shaped sealing ring 15 is buckled with the guide cylinder cap 14 through the matching of the lock catch 19 and the limit clamping groove 22. The guide structure 12 further comprises an O-shaped sealing ring 16, the O-shaped sealing ring 16 is sleeved with the guide cylinder cap 14, the guide cylinder cap 14 is in sealing connection with the guide cylinder 11 through the O-shaped sealing ring 16, a limiting groove 21 is formed in the outer side of the guide cylinder cap 14, the O-shaped sealing ring 16 is sleeved with the limiting groove 21, external threads are formed in the lower surface of the outer side of the guide cylinder cap 14, internal threads are formed in the inner side wall of the guide cylinder 11, the guide cylinder cap 14 is in threaded connection with the guide cylinder 11 through the matching of the external threads and the internal threads, and the O-shaped sealing ring 16, the guide cylinder cap vent hole 17 and the guide cylinder vent hole 18 are all arranged between the limiting groove 21 and the external threads.

As shown in fig. 2, the cylinder barrel 1 is provided with a jack 26, a release bolt 13 is arranged in the jack 26, and the release bolt 13 is in threaded connection with the jack 26. The upper end of the guide cylinder cap 14 is connected with a limiting convex ring 27, the limiting convex ring 27 and the guide cylinder cap 14 are integrally formed, and the limiting convex ring 27 is attached to the upper end face of the guide cylinder 11.

As shown in fig. 1-5: the push rod 28 is connected in the driving pressureless cavity 3, the structural shape of the push rod 28 is T-shaped, one end of the push rod 28 is attached to the membrane 9, the other end of the push rod 28 is connected with the shifting fork 29, the push rod 28 is sleeved with the return spring 30 for pushing the push rod 28 to reset, the driving pressureless cavity 3 is provided with the air outlet hole for discharging air from the driving pressureless cavity 3, and the energy storage spring cavity 7 is internally connected with the energy storage spring 31.

The guide cylinder cap 21 and the guide cylinder cap 15 are made of the same material as the guide cylinder 11, so that looseness caused by expansion caused by heat and contraction caused by change of external environment is prevented.

Internal respiratory system workflow:

igniting an air source when the vehicle is in flameout and parking, and stepping on the foot brake: the driving cavity 4 is accessed through the first air inlet 5, the air flow of the driving cavity 4 enters the gap between the guide cylinder 11 and the guide cylinder cap 14 through the guide cylinder vent hole 18, the air flow of the gap washes down the air pressure groove 25, and then the lip edge 23 and the lip edge 24 on the two sides are pressed outwards, so that the lip edge 23 can press the surface of the guide cylinder cap 14, the guide cylinder cap vent hole 17 can be closed, the lip edge 24 can press the wall of the guide cylinder 11, the inside of the guide cylinder 11 is closed, the air flow is cut off between the inside of the guide cylinder 11 and the gap between the guide cylinder 11 and the guide cylinder cap 14, and the energy storage spring cavity 7 is not circulated with the outside air flow, and the braking state is kept;

and (5) releasing the hand brake: the parking cavity 6 is filled with air through the air inlet II 8, the air pressure enables the piston 10 and the guide cylinder 11 to retract, the push rod 28 is gradually pushed to retract by the air pressure to release the retraction spring 30, the shifting fork 29 is gradually pushed to retract, the energy storage spring 31 is compressed, and the pressure in the energy storage spring cavity 7 is gradually converted into pressure boost;

and (5) foot brake loosening: the air of the driving cavity 4 is discharged from the first air inlet 5, namely the pressure on the special-shaped sealing ring 15 is released, and on the other hand, the special-shaped sealing ring 15 (lip one 23) is reversely flushed due to the pressurization of the energy storage spring cavity 7: the pressurized gas flows through the inner cavity of the guide cylinder 11, the guide cylinder cap vent hole 17, the special-shaped sealing ring 15 and the first gap lip 23 of the wall of the guide cylinder cap 14 from the energy storage spring cavity 7, is internally flushed out of the gap, the gap between the guide cylinder 11 and the guide cylinder cap 14, the guide cylinder vent hole 18 and the driving cavity 5 and is discharged together, so that the pressurization in the energy storage spring cavity 7 is eliminated. The automobile runs.

Stopping running and stepping on the foot brake: the driving cavity 4 is accessed through the first air inlet 5, and air pressure enables the diaphragm to squeeze the return spring 30, so that the return spring 30 is contracted. The guide cylinder 11 is not blocked by the elastic force of the return spring 30, the piston 10 and the guide cylinder 11 advance into the driving cavity 4, the air pressure presses the lip I23, and the push rod 28 and the shifting fork 29 extend along with the movement of the piston 10 and the guide cylinder 11;

handle brake: the parking cavity 6 is exhausted through the second air inlet 8, the piston 10 and the guide cylinder 11 move towards the middle body 2, and the energy storage spring 31 stretches, so that the space of the energy storage spring cavity is enlarged to form a negative pressure state;

and (5) foot brake loosening: the air in the driving cavity 4 is discharged from the first air inlet 5, namely, the pressure on the lip edge 23 is released, the air flow enters the guide cylinder cap vent hole 17 from the gap between the lip edge 23 and the guide cylinder cap 14, enters the energy storage spring cavity 7 through the inside of the guide cylinder 11 to supplement the pressure of the energy storage spring cavity 7 in a short time to maintain balance, the negative pressure in the energy storage spring cavity 7 is eliminated, and the energy storage spring 31 brakes. The parking brake is put out and stopped.

Example 2:

as shown in fig. 1-3, an internal breather valve device for air internal circulation of a piston brake chamber comprises a cylinder 1 and a front cover 32, a middle body 2 is connected between the cylinder 1 and the front cover 32, a driving non-pressure cavity 3 and a driving cavity 4 are arranged between the middle body 2 and the front cover 32, a first air inlet 5 is arranged on the middle body 2 and is communicated with the driving cavity 4, a parking cavity 6 and an energy storage spring cavity 7 are arranged between the middle body 2 and the cylinder 1, an air inlet 8 is arranged on the middle body 2 and is communicated with the parking cavity 6, a diaphragm 9 is arranged between the driving non-pressure cavity 3 and the driving cavity 4, the diaphragm 9 is fixedly arranged between the middle body 2 and the front cover 32, a piston 10 is arranged between the parking cavity 6 and the energy storage spring cavity 7, the piston 10 is in sliding connection with the cylinder 1, a guide cylinder 11 is arranged in the parking cavity 6, one end of the guide cylinder 11 is in sliding connection with the middle body 2, a guide structure 12 is connected with the guide cylinder 11, the other end of the guide cylinder 11 is connected with the piston 10, the guide structure 12 comprises a guide cylinder cap 14 and a special-shaped sealing ring 15, the guide cylinder cap 14 is arranged in the guide cylinder 11 and is connected with the guide cap 11, the upper side surface of the guide cylinder cap 14 is connected with the guide cylinder 11, the guide cylinder cap is provided with the upper end of the guide cylinder 11, and the guide cylinder 11 is connected with the air vent hole 17.

As shown in fig. 3, the special-shaped sealing ring 15 is connected with a lip edge one 23 and a lip edge two 24, the lip edge one 23 is arranged on one side close to the guide cylinder cap 14 and corresponds to the guide cylinder cap vent hole 17, the lip edge two 24 is arranged on one side close to the guide cylinder and below the guide cylinder vent hole 18, and a gap between the lip edge one 23 and the lip edge two 24 is set as an air pressure groove 25. The special-shaped sealing ring 15 is connected with a lock catch 19, the guide cylinder cap 14 is provided with a limit clamping groove 22, and the special-shaped sealing ring 15 is buckled with the guide cylinder cap 14 through the matching of the lock catch 19 and the limit clamping groove 22.

As shown in fig. 2, the cylinder barrel 1 is provided with a jack 26, a release bolt 13 is arranged in the jack 26, and the release bolt 13 is in threaded connection with the jack 26. The upper end of the guide cylinder cap 14 is connected with a limiting convex ring 27, the limiting convex ring 27 and the guide cylinder cap 14 are integrally formed, and the limiting convex ring 27 is attached to the upper end face of the guide cylinder 11.

As shown in fig. 6 and 7, the upper end surface of the guide cylinder cap 14 is provided with a second guide cylinder cap end surface vent hole 33, and the position of the second guide cylinder cap end surface vent hole 33 corresponds to the position of the air pressure groove 25 on the special-shaped sealing ring 15 in an up-down manner.

Internal respiratory system workflow:

igniting an air source when the vehicle is in flameout and parking, and stepping on the foot brake: the driving cavity 4 is accessed through the first air inlet 5, the air flow of the driving cavity 4 enters the gap between the guide cylinder 11 and the guide cylinder cap 14 through the second air inlet 33 and the guide cylinder air inlet 18, the air flow of the gap washes down the air pressure groove 25, and then the lip edge one 23 and the lip edge two 24 on two sides are pressed outwards, so that the lip edge one 23 is pressed against the surface of the guide cylinder cap 14 to seal the guide cylinder cap air inlet 17, the lip edge two 24 is pressed against the guide cylinder 11 wall to seal the inside of the guide cylinder 11 cavity, and then the air flow is cut off between the inside of the guide cylinder 11 cavity and the gap between the guide cylinder 11 and the guide cylinder cap 14, so that the energy storage spring cavity 7 does not circulate with the outside air flow, and the brake state is kept;

and (5) releasing the hand brake: the parking cavity 6 is filled with air through the air inlet II 8, the air pressure enables the piston 10 and the guide cylinder 11 to retract back to the position spring 30 to release and gradually push the push rod 28 to retract back and the shifting fork 45 to retract, the energy storage spring 31 is compressed, and the pressure in the energy storage spring cavity 7 is gradually changed into supercharging;

and (5) foot brake loosening: the air of the driving cavity 4 is discharged from the first air inlet 5, namely the pressure on the special-shaped sealing ring 15 is released, and on the other hand, the special-shaped sealing ring 15 (lip one 23) is reversely flushed due to the pressurization of the energy storage spring cavity 7: the pressurized gas flows through the inner cavity of the guide cylinder 11, the guide cylinder cap vent hole 17, the special-shaped sealing ring 15 and the first gap lip 23 of the wall of the guide cylinder cap 14 from the energy storage spring cavity 7, is internally flushed out of the gap, the gap between the guide cylinder 11 and the guide cylinder cap 14, the second vent hole 33 of the end surface of the guide cylinder cap, the guide cylinder vent hole 18 and the driving cavity 5 and is discharged together, so that the pressurization in the energy storage spring cavity 7 is eliminated. The automobile runs.

Stopping running and stepping on the foot brake: the driving cavity 4 is accessed through the first air inlet 5, and air pressure enables the diaphragm to squeeze the return spring 30, so that the return spring 30 is contracted. The guide cylinder 11 is not blocked by the elastic force of the return spring 30, the piston 10 and the guide cylinder 11 advance into the driving cavity 4, the air pressure presses the lip I23, and the push rod 28 and the shifting fork 29 extend along with the movement of the piston 10 and the guide cylinder 11;

handle brake: the parking cavity 6 is exhausted through the second air inlet 8, the piston 10 and the guide cylinder 11 move towards the middle body 2, and the energy storage spring 31 stretches, so that the space of the energy storage spring cavity 7 is enlarged to form a negative pressure state;

and (5) foot brake loosening: the air in the driving cavity 4 is discharged from the first air inlet 5, namely, the pressure on the lip edge 23 is released, the air flow enters the guide cylinder cap vent hole 17 from the gap between the lip edge 23 and the guide cylinder cap 14, enters the energy storage spring cavity 7 through the inside of the guide cylinder 11 to supplement the pressure of the energy storage spring cavity 7 in a short time to maintain balance, the negative pressure in the energy storage spring cavity 7 is eliminated, and the energy storage spring 31 brakes. The parking brake is put out and stopped.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (7)

1. The utility model provides an interior breather valve device that piston brake chamber air internal circulation used, its characterized in that includes cylinder (1) and protecgulum (32), be connected with well body (2) in between cylinder (1) and protecgulum (32), be equipped with driving pressureless chamber (3) and driving chamber (4) between well body (2) and protecgulum (32), be equipped with air inlet one (5) and be linked together with driving chamber (4) on well body (2), be equipped with parking chamber (6) and energy storage spring chamber (7) between well body (2) and cylinder (1), be equipped with air inlet two (8) on well body (2) and be linked together with parking chamber (6), be equipped with diaphragm (9) between driving pressureless chamber (3) and driving chamber (4), diaphragm (9) fixed mounting is between well body (2) and protecgulum (32), be equipped with piston (10) between well body (6) and energy storage spring chamber (7), piston (10) and (1) sliding connection, be equipped with guide cylinder (11) and guide cylinder (11) are connected to one end in the guide cylinder (11), the guide structure (12) comprises a guide cylinder cap (14) and a special-shaped sealing ring (15), the special-shaped sealing ring (15) is sleeved with the guide cylinder cap (14), the guide cylinder cap (14) is arranged in the guide cylinder (11) and is in threaded connection with the guide cylinder (11), the side surface of the upper end of the guide cylinder cap (14) is in sealing connection with the inner wall of the upper end of the guide cylinder (11), a guide cylinder cap vent hole (17) is formed in the guide cylinder cap (14), a guide cylinder vent hole (18) is formed in the guide cylinder (11), and the guide cylinder (11) is communicated with the energy storage spring cavity (7).

2. An internal breather valve device for air internal circulation of a piston brake chamber according to claim 1, wherein the special-shaped sealing ring (15) is connected with a lip edge one (23) and a lip edge two (24), the lip edge one (23) is arranged at one side close to the guide cylinder cap (14) and corresponds to the guide cylinder cap vent hole (17), the lip edge two (24) is arranged at one side close to the guide cylinder and is arranged below the guide cylinder vent hole (18), and a gap between the lip edge one (23) and the lip edge two (24) is set as an air pressure groove (25).

3. The internal breather valve device for the internal circulation of the air of the piston type brake chamber according to claim 2, wherein the special-shaped sealing ring (15) is connected with a lock catch (19), the guide cylinder cap (14) is provided with a limit clamping groove (22), and the special-shaped sealing ring (15) is buckled with the guide cylinder cap (14) through the matching of the lock catch (19) and the limit clamping groove (22).

4. The internal breather valve device for the internal circulation of air in the piston brake chamber according to claim 1, wherein the cylinder (1) is provided with a jack (26), a release bolt (13) is arranged in the jack (26), and the release bolt (13) is in threaded connection with the jack (26).

5. An internal breather valve device for air internal circulation of a piston brake chamber according to claim 3, wherein the upper end of the guide cylinder cap (14) is connected with a limit convex ring (27), the limit convex ring (27) and the guide cylinder cap (14) are integrally formed, and the limit convex ring (27) is attached to the upper end face of the guide cylinder (11).

6. The internal breather valve device for the internal circulation of air in the piston brake chamber according to claim 1, wherein the flow guiding structure (12) further comprises an O-shaped sealing ring (16), the O-shaped sealing ring (16) is sleeved with the guide cylinder cap (14), the guide cylinder cap (14) is in sealing connection with the guide cylinder (11) through the O-shaped sealing ring (16), a limiting groove (21) is formed in the outer side of the guide cylinder cap (14), the O-shaped sealing ring (16) is sleeved with the limiting groove (21), an external thread is formed in the lower surface of the outer side of the guide cylinder cap (14), an internal thread is formed in the inner side wall of the guide cylinder (11), the guide cylinder cap (14) is in threaded connection with the guide cylinder (11) through the cooperation of the external thread and the internal thread, and the O-shaped sealing ring (16), the guide cylinder cap vent hole (17) and the guide cylinder vent hole (18) are all arranged between the limiting groove (21) and the external thread.

7. The internal breather valve device for the internal circulation of air in the piston brake chamber according to claim 1 or 6, wherein the upper end surface of the guide cylinder cap (14) is provided with a guide cylinder cap end surface vent hole II (33), and the position of the guide cylinder cap end surface vent hole II (33) corresponds to the position of the air pressure groove (25) on the special-shaped sealing ring (15) up and down.