CN217002810U - Spring brake air chamber - Google Patents

Abstract

The utility model relates to a spring brake air chamber, which comprises a middle body and a left end cover, wherein a leather membrane and the middle body are arranged between the middle body and the left end cover, the outer sides of the whole edges of the leather membrane and the left end cover are sleeved with the clamp, the leather membrane is provided with the connecting fork, the outer side of the connecting fork extending to the left end cover is provided with the push rod, the reset spring is arranged between the connecting fork and the left end cover, the reset spring is sleeved on the push rod, one side of the left end cover close to the middle body is provided with the limiting plate, one side of the limiting plate close to the connecting fork is provided with the limiting lug, the limiting lug is matched with the inner diameter of the reset spring, two sides of the edge parts of the middle body and the left end cover are respectively provided with the sealing groove, two sides of the edge of the leather membrane and the inside of the clamp are respectively and correspondingly provided with the sealing bulge, and the edge of the clamp is provided with the guide edge corresponding to the sealing bulge.

Description

Spring brake air chamber

Technical Field

The utility model relates to the technical field of brake chambers, in particular to a spring brake chamber.

Background

The brake chamber is a device composed of an air inlet, a cover, a diaphragm, a supporting disc, a return spring, a shell, a push rod, a connecting fork, a clamp, a bolt and the like, and is also called a slave pump, the function of the slave pump is to convert the pressure of compressed air into mechanical force for rotating a brake camshaft so as to realize braking action, when an automobile brakes, air enters the brake chamber from the air inlet, the diaphragm is deformed under the action of the air pressure, the push rod is pushed, a brake adjusting arm is driven, a brake cam is rotated, and a brake shoe friction plate is pressed to a brake drum so as to generate braking.

Chinese patent document No. CN205715377U provides a diaphragm type spring brake chamber, which includes a housing, the housing includes a left end cap, a middle housing and a right end cap; a parking cavity is arranged between the left end cover and the middle shell, and a travelling cavity is arranged between the right end cover and the middle shell; the middle shell is provided with a first air inlet and a second air inlet, the first air inlet is connected with the manual valve and communicated with the parking cavity, and the second air inlet is connected with the foot brake valve and communicated with the driving cavity; a diaphragm is arranged in the travelling crane cavity; the left end cover is provided with an integrated caulking groove, and the middle shell and the diaphragm stretch into the caulking groove and are pressed and buckled in the caulking groove.

Adopt the caulking groove of integral type to buckle middle casing and diaphragm in the above-mentioned scheme and press fixedly, middle casing and diaphragm extrusion deformation just can fill in the caulking groove like this, otherwise can't realize in the casing and the left end lid and the right-hand member between be connected, and in the actual production, middle casing and end cover lead to long adoption have the material of certain hardness to support, can't realize warping the card and go into, the equipment is not accurate, influence the convenience and the leakproofness of whole equipment, in addition, in the use, return spring produces the displacement at the in-process that reciprocal compression and resume easily, when will lead to the involucra to overcome return spring's elasticity and promote the yoke and remove like this, the yoke can produce the skew, make the one end that the end cover was worn out to the yoke produce the friction with the end cover, cause the wearing and tearing of yoke.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a spring brake chamber to solve the above problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a spring brake air chamber, includes well body and left end lid, be provided with the involucra between well body and the left end lid, the whole edge outside cover of well body, involucra and left end lid is equipped with the clamp, be provided with the clevis on the involucra, the outside that the clevis extends to the left end lid is provided with the push rod, be provided with reset spring between clevis and the left end lid, reset spring overlaps and establishes on the push rod, one side that the left end lid is close to the well body is provided with the limiting plate, one side that limiting plate and clevis are close to each other all is provided with spacing lug, spacing lug matches with reset spring's internal diameter, the marginal position both sides of well body and left end lid all are provided with sealed concave groove, the marginal both sides of involucra and the inside of clamp all correspond and are provided with sealed arch, the marginal correspondence of clamp is provided with the direction limit.

As a further scheme of the utility model: the one end that limiting plate and yoke kept away from each other all is provided with the linkage segment, one side that left end lid and involucra kept away from each other all is provided with solid fixed ring, the linkage segment passes threaded connection between corresponding left end lid and involucra and the solid fixed ring respectively, and through linkage segment and solid fixed ring's cooperation make between limiting plate and the left end lid and between yoke and the involucra demountable installation, be convenient for equipment, overhaul and change.

As a still further scheme of the utility model: one end of the push rod is fixed on the connecting fork, the other end of the push rod sequentially penetrates through the limiting lug, the limiting plate, the left end cover, the connecting section and the fixing ring outwards, a sealing gasket ring is arranged between the limiting plate and the left end cover, and the whole sealing performance is enhanced.

As a still further scheme of the utility model: the two ends of the clamp are provided with fastening ends, two fastening bolt pieces are arranged between the fastening ends, the two ends of the clamp are fixed through the matching of the fastening ends and the fastening bolt pieces, and the clamp is convenient to mount and dismount.

As a still further scheme of the utility model: the other side of the middle body is provided with a right end cover, and the fixing mode between the right end cover and the middle body is the same as that between the left end cover and the middle body, so that the whole assembly is facilitated.

As a still further scheme of the utility model: the middle part of the middle body is penetrated with a plug rod in a sliding mode, one side, close to the right end cover, of the plug rod is provided with a piston, the piston is matched with an inner cavity of the right end cover, a parking brake spring is arranged between the piston and the right end cover, and the whole parking brake is achieved through the cooperation of the plug rod, the piston, the brake spring and compressed gas input from the outside.

As a still further scheme of the utility model: the middle part of the middle body is provided with a guide block, the guidance quality of the plug rod during movement is enhanced, the stability of the plug rod during movement is improved, the guide block sleeve is arranged on the outer side of the plug rod, a limiting push plate is arranged on one side, close to the leather membrane, of the plug rod, the limiting push plate can prevent the plug rod from being separated from the middle body, meanwhile, the more stable leather membrane can be pushed to move, and the movement of the push rod is achieved.

As a still further scheme of the utility model: the middle body is provided with a first air inlet and a second air inlet, the first air inlet is communicated with a cavity formed between the skin membrane and the middle body, the second air inlet is communicated with the cavity formed between the middle body and the piston, and the outside compressed gas is injected and discharged through the first air inlet and the second air inlet.

Compared with the prior art, the utility model has the advantages that:

1. the utility model comprises a middle body and a left end cover, wherein a limiting plate is arranged on one side of the left end cover close to the middle body, a limiting lug is arranged on one side of the limiting plate close to the connecting fork, the two ends of a return spring are sleeved on the outer sides of the limiting lugs, and the movement of the return spring during compression or extension is limited by the limiting lugs, so that the return spring is prevented from generating deflection in the repeated compression process, the movement stability of the connecting fork and a push rod is kept, and the abrasion between the push rod and the left end cover is reduced.

2. According to the utility model, the limiting plate and the connecting fork are respectively arranged on the corresponding left end cover and the corresponding leather membrane through the matching of the connecting section and the fixing ring, so that the assembly and disassembly of the limiting plate and the connecting fork are convenient, the maintenance is convenient, meanwhile, the guiding and guiding of the push rod in the moving process can be enhanced through the matching of the connecting section, the limiting plate and the limiting lug, and the moving stability is improved.

3. The sealing grooves are respectively arranged on the two sides of the edge of the middle body and the left end cover, the sealing bulges are respectively correspondingly arranged on the two sides of the edge of the membrane and the inner part of the clamp, the sealing performance among the middle body, the membrane and the left end cover is enhanced through the matching of the sealing bulges and the sealing grooves, the integral sealing performance is improved, meanwhile, the locking performance of the clamp can be enhanced through the matching of the sealing bulges on the clamp and the corresponding sealing grooves on the middle body and the left end cover, the phenomenon of slipping of the clamp is prevented, and the guide edge is arranged on the edge of the clamp corresponding to the sealing bulges, so that the clamp can be conveniently clamped in during assembly.

4. The middle part of the middle body is provided with the guide block, the guide block is sleeved on the outer side of the plug rod, the limit push plate is arranged on one side, close to the membrane, of the plug rod, the plug rod can be prevented from being separated from the middle body through the limit push plate, the moving stability is improved, meanwhile, the guide block is matched with the fixing ring on the membrane, the pushing stability is improved, the abrasion of the membrane is prevented, the guide block can be arranged to strengthen the guide when the plug rod moves, and the moving stability of the plug rod is further improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a spring brake chamber according to the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is a cross-sectional view of the overall internal structure of the present invention;

FIG. 4 is an exploded view of the connection structure between the limiting plate and the fixing plate according to the present invention;

fig. 5 is a schematic view of the overall structure of the clip of the present invention.

In the figure: 1. a middle body; 2. a left end cap; 3. a skin membrane; 4. a clamping hoop; 5. a connecting fork; 6. a push rod; 7. a return spring; 8. a limiting plate; 9. a limiting bump; 10. sealing the groove; 11. sealing the protrusion; 12. a guide edge; 13. a connecting section; 14. a fixing ring; 15. a sealing gasket ring; 16. a fastening end; 17. a fastening bolt member; 18. a right end cap; 19. a plug rod; 20. a piston; 21. a parking brake spring; 22. a guide block; 23. a limiting push plate; 24. a first air inlet; 25. a second air inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1 to 5, in the embodiment of the present invention:

a spring brake air chamber comprises a middle body 1 and a left end cover 2, a leather membrane 3 is arranged between the middle body 1 and the left end cover 2, the middle body 1, the clamping hoop 4 is sleeved on the outer side of the whole edge of the leather membrane 3 and the left end cover 2, the connecting fork 5 is arranged on the leather membrane 3, a push rod 6 is arranged on the outer side of the connecting fork 5 extending to the left end cover 2, a reset spring 7 is arranged between the connecting fork 5 and the left end cover 2, the reset spring 7 is sleeved on the push rod 6, a limiting plate 8 is arranged on one side, close to the middle body 1, of the left end cover 2, a limiting lug 9 is arranged on one side, close to the limiting plate 8 and the connecting fork 5, of each other, the limiting lug 9 is matched with the inner diameter of the reset spring 7, sealing grooves 10 are arranged on two sides of the edge of the middle body 1 and the edge of the left end cover 2, sealing bulges 11 are correspondingly arranged on two sides of the edge of the leather membrane 3 and inside of the clamping hoop 4, and guiding edges 12 are arranged corresponding to the sealing bulges 11 on the edge of the clamping hoop 4.

In the embodiment of the utility model: the end, far away from each other, of each of the limiting plate 8 and the corresponding connecting fork 5 is provided with a connecting section 13, one side, far away from each other, of each of the left end cover 2 and the corresponding leather diaphragm 3 is provided with a fixing ring 14, each connecting section 13 penetrates through the corresponding left end cover 2 and the corresponding leather diaphragm 3 to be in threaded connection with the fixing ring 14, the limiting plate 8 is detachably mounted on the left end cover 2 through the matching of the fixing ring 14 and the connecting section 13, and the connecting fork 5 is detachably mounted on the leather diaphragm 3 at the same time, so that when the connecting fork 5 or the limiting plate 8 is damaged, the maintenance and the replacement are convenient, and the integral assembly is convenient, one end of the push rod 6 is fixed on the connecting fork 5, the other end of the push rod sequentially penetrates through the limiting lug 9, the limiting plate 8, the left end cover 2, the connecting section 13 and the fixing ring 14, a sealing gasket ring 15 is arranged between the limiting plate 8 and the left end cover 2, and the sealing performance between the limiting plate 8 and the left end cover 2 can be enhanced through the sealing gasket ring 15, the overall sealing performance is improved.

In the embodiment of the utility model: the both ends of clamp 4 are provided with fastening end 16, are provided with fastening bolt spare 17 between two fastening ends 16, and it is fixed to connect between two fastening ends 16 through fastening bolt spare 17 to realize the fixed at the both ends of clamp 4, and then realize the tight fixed of clamp between left end cover 2, involucra 3 and the well body 1, the holistic equipment of being convenient for.

In the embodiment of the utility model: the other side of the middle body 1 is provided with a right end cover 18, the fixing mode between the right end cover 18 and the middle body 1 is the same as the fixing mode between the left end cover 2 and the middle body 1, the same fixing mode is adopted, the assembly efficiency is improved, the middle part of the middle body 1 is provided with a plug rod 19 in a sliding penetrating mode, one side of the plug rod 19 close to the right end cover 18 is provided with a piston 20, the piston 20 is matched with the inner cavity of the right end cover 18, a parking brake spring 21 is arranged between the piston 20 and the right end cover 18, the middle part of the middle body 1 is provided with a guide block 22, the guide block 22 is sleeved on the outer side of the plug rod 19, one side of the plug rod 19 close to the leather diaphragm 3 is provided with a limiting push plate 23, the middle body 1 is provided with a first air inlet 24 and a second air inlet 25, the first air inlet 24 is communicated with a cavity formed between the leather diaphragm 3 and the middle body 1, the second air inlet 25 is communicated with the cavity formed between the middle body 1 and the piston 20, when parking brake is needed to be realized, the second air inlet 25 is connected to the outside atmosphere, and the air pressure at the second air inlet 25 is released, and at this time, under the action of the parking brake spring 21, the piston 20 is pushed to move towards the middle body 1 by the elastic force of the parking brake spring 21, the piston 20 drives the plug rod 19 to move, the plug rod 19 drives the limit push plate 23 to move, the limiting push plate 23 pushes the leather diaphragm 3 to move, the movement of the leather diaphragm 3 pushes the connecting fork 5 to move, the push rod 6 is pushed to move outwards by the movement of the connecting fork 5, the brake of the external brake drum is realized, the stopper rod 19 can be prevented from separating from the middle body 1 by arranging the limit push plate 23, the moving stability is improved, meanwhile, the stopper rod is matched with a fixing ring 14 positioned on the coating 3, so that the pushing stability is improved, the coating 3 is prevented from being abraded, the guide block 22 can be used for enhancing the guide and the guide when the stopper rod 19 moves, and the moving stability of the stopper rod 19 is further improved.

Example 2:

referring to fig. 1 to 5, the utility model relates to a spring brake chamber, which comprises a middle body 1 and a left end cover 2, wherein a service brake chamber is formed between the middle body 1 and the left end cover 2, when service braking is required to be realized, compressed gas is injected into the service brake chamber through a first gas inlet 24, the compressed gas enters between the middle body 1 and a skin membrane 3 and extrudes the skin membrane 3, so that the skin membrane 3 moves, a connecting fork 5 is driven by the skin membrane 3 to move, a push rod 6 is driven by the connecting fork 5 to move outwards, braking of an external brake drum is realized, in the process, the movement of the connecting fork 5 can extrude a return spring 7, so that the return spring 7 generates elastic force, when service braking is required to be relieved, the compressed gas injected through the first gas inlet 24 is exhausted, so that the first gas inlet 24 is connected with the atmosphere, at this time, the connecting fork 5 is driven to move to the original position under the elastic force of the return spring 7, the connecting fork 5 drives the push rod 6 to return to the original position, so that the service brake is released, the limiting lugs 9 are arranged on the connecting fork 5, two ends of the return spring 7 are sleeved outside the limiting lugs 9, the movement of the return spring 7 during compression or extension is limited by the limiting lugs 9, the return spring 7 is prevented from deviating during repeated compression, the movement stability of the connecting fork 5 and the push rod 6 is kept, the abrasion between the push rod 6 and the left end cover 2 is reduced, meanwhile, the limiting plate 8 and the connecting fork 5 are respectively arranged on the corresponding left end cover 2 and the corresponding membrane 3 through the matching of the connecting section 13 and the fixing ring 14, so that the assembly and disassembly of the limiting plate 8 and the connecting fork 5 are convenient, the maintenance is convenient, and the guiding guide of the push rod 6 during the movement can be enhanced through the matching of the connecting section 13, the limiting plate 8 and the limiting lugs 9, the movement stability is improved.

Example 3:

referring to fig. 1 to 5, on the basis of embodiment 2, the utility model relates to a spring brake air chamber, which includes a middle body 1 and a right end cover 18, a parking brake chamber is formed between the middle body 1 and the right end cover 18, a plug rod 19 is slidably inserted into the middle of the middle body 1, a piston 20 is disposed on one side of the plug rod 19 close to the right end cover 18, the piston 20 is matched with an inner cavity of the right end cover 18, a parking brake spring 21 is disposed between the piston 20 and the right end cover 18, when parking brake is required, a second air inlet 25 is connected to the outside atmosphere and contacts with air pressure at the second air inlet 25, at this time, under the action of the parking brake spring 21, the piston 20 is pushed to move towards the middle body 1 by the elastic force of the parking brake spring 21, the plug rod 19 is driven to move by the piston 20, the plug rod 19 is driven to move by limiting, the push plate 23 is pushed to move by the limiting push plate 23, the movement of the connection fork 5 is pushed by the movement of the limiting membrane 3, the push rod 6 is pushed to move outwards through the movement of the connecting fork 5, the brake of an external brake drum is realized, when the parking brake needs to be relieved, compressed gas is injected between the middle body 1 and the piston 20 through the second air inlet 25, the pressure of the compressed gas for extruding the piston 20 overcomes the elastic force of the parking brake spring 21, the piston 20 pushes the piston 20 to the original position, the piston 20 drives the plug rod 19 to return to the original position, and thus the membrane 3 returns to the original position under the action of the reset spring 7, so that the connecting fork 5 drives the push rod 6 to return to the original position, and the contact of the parking brake is realized, the middle part of the middle body 1 is provided with the guide block 22, the guide block 22 is sleeved on the outer side of the plug rod 19, one side of the plug rod 19 close to the membrane 3 is provided with the limiting push plate 23, the plug rod 19 can be prevented from being separated from the middle body 1 through the limiting push plate 23, the movement stability is improved, and the fixing ring 14 on the membrane 3 is matched at the same time, the pushing stability is improved, abrasion of the coating 3 is prevented, and the guide block 22 is provided to enhance the guide when the stopper rod 19 moves, thereby further improving the movement stability of the stopper rod 19.

Example 4:

on the basis of the embodiment 2 and the embodiment 3, the utility model is provided with the sealing grooves 10 at two sides of the edge parts of the middle body 1 and the left end cover 2, the sealing bulges 11 at two sides of the edge of the skin 3 and the inside of the clamp 4 are correspondingly provided, the edge of the clamp 4 is provided with the guide edges 12 corresponding to the sealing bulges 11, when the connection and fixation among the middle body 1, the skin 3 and the left end cover 2 are required, the sealing bulges 11 on the skin 3 are matched with the corresponding sealing grooves 10 on the middle body 1 and the left end cover 2, then two side edges of the clamp 4 are respectively sleeved at the outer sides of the middle body 1 and the left end cover 2, so that the sealing bulges 11 on the clamp 4 are respectively matched with the corresponding sealing grooves 10 on the left end cover 2 and the middle body 1, the clamping and fixation among the left end cover 2, the skin 3 and the middle body 1 are realized, the guide plate is arranged on the clamp 4, thus the clamp 4 can be better clamped in when being clamped, improve the equipment convenience, later, it is fixed to connect between the fastening end 16 at clamp 4 both ends through fastening bolt spare 17 to realize the connection at clamp 4 both ends fixed, the installation between body 1, left end lid 2 and the involucra 3 is fixed in the realization, improves the equipment convenience, strengthens holistic leakproofness and locking performance through the cooperation of sealed arch 11 and sealed recess 10 simultaneously, prevents that clamp 4 from producing the slippage.

In all the above-mentioned embodiments, the connection between the two components may be selected from welding, matching connection of bolt and nut, bolt or screw connection, or other known connection methods according to practical situations, which are not described herein in detail, and the above-mentioned embodiments are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can be within the technical scope of the present invention, and equivalent substitutions or changes can be made according to the technical solution of the present invention and the practical idea thereof, and all the modifications and changes are intended to be covered by the scope of the present invention.

Claims (8)

1. The utility model provides a spring brake chamber, includes well body (1) and left end housing (2), be provided with involucra (3) between well body (1) and left end housing (2), the whole marginal outside cover of well body (1), involucra (3) and left end housing (2) is equipped with clamp (4), be provided with fork (5) on involucra (3), the outside that fork (5) extend to left end housing (2) is provided with push rod (6), be provided with reset spring (7) between fork (5) and left end housing (2), reset spring (7) cover is established on push rod (6), its characterized in that: one side that left end cover (2) is close to well body (1) is provided with limiting plate (8), limiting plate (8) and yoke (5) one side that is close to each other all is provided with spacing lug (9), spacing lug (9) match with the internal diameter of reset spring (7), the marginal portion both sides of well body (1) and left end cover (2) all are provided with sealed concave groove (10), the marginal both sides of involucra (3) and the inside of clamp (4) all correspond and are provided with sealed arch (11), the edge of clamp (4) corresponds sealed arch (11) and is provided with guiding edge (12).

2. A spring brake chamber according to claim 1, wherein: limiting plate (8) and clevis (5) one end of keeping away from each other all are provided with linkage segment (13), one side that left end lid (2) and involucra (3) kept away from each other all is provided with solid fixed ring (14), threaded connection between left end lid (2) and involucra (3) and the solid fixed ring (14) that correspond is passed respectively in linkage segment (13).

3. A spring brake chamber according to claim 2, wherein: push rod (6) one end is fixed on yoke (5), and the other end outwards passes spacing lug (9), limiting plate (8), left end lid (2), linkage segment (13) and solid fixed ring (14) in proper order, just be provided with between limiting plate (8) and left end lid (2) sealing gasket ring (15).

4. A spring brake chamber according to claim 3, wherein: fastening ends (16) are arranged at two ends of the clamp (4), and a fastening bolt piece (17) is arranged between the two fastening ends (16).

5. A spring brake chamber according to claim 4, wherein: the other side of the middle body (1) is provided with a right end cover (18), and the fixing mode between the right end cover (18) and the middle body (1) is the same as the fixing mode between the left end cover (2) and the middle body (1).

6. A spring brake chamber according to claim 5, wherein: the middle part of the middle body (1) is provided with a plug rod (19) in a sliding penetrating mode, one side, close to the right end cover (18), of the plug rod (19) is provided with a piston (20), the piston (20) is matched with an inner cavity of the right end cover (18), and a parking brake spring (21) is arranged between the piston (20) and the right end cover (18).

7. A spring brake chamber according to claim 6, wherein: the middle part of the middle body (1) is provided with a guide block (22), the guide block (22) is sleeved on the outer side of the plug rod (19), and a limiting push plate (23) is arranged on one side, close to the leather membrane (3), of the plug rod (19).

8. A spring brake chamber according to claim 6, wherein: the middle body (1) is provided with a first air inlet (24) and a second air inlet (25), the first air inlet (24) is communicated with a cavity formed between the coating (3) and the middle body (1), and the second air inlet (25) is communicated with a cavity formed between the middle body (1) and the piston (20).

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