CN202100635U

CN202100635U - Internal-respiration piston type energy storage spring brake chamber

Info

Publication number: CN202100635U
Application number: CN2011201934119U
Authority: CN
Inventors: 孙浩良
Original assignee: JIANG GUOFEN
Current assignee: Jiangsu Hengxin sunthone Technology Co. Ltd.
Priority date: 2011-06-10
Filing date: 2011-06-10
Publication date: 2012-01-04
Anticipated expiration: 2021-06-10

Abstract

The utility model relates to an internal-respiration piston type energy storage spring brake chamber, which comprises a cylinder body, an end cover and a middle body used for connecting the cylinder body and the end cover. The cylinder body is internally provided with an energy storage spring, a piston and a piston pipe connected with the piston, a plugging cover is arranged in the piston pipe, an air hole is arranged on a top cover of the plugging cover, the air hole is communicated with the outside of the piston pipe, an air through hole is arranged on the plugging cover, a gap is reserved between the plugging cover and the piston pipe, and the air through hole on the plugging cover is communicated with the air hole on the top cover through the gap between the plugging cover and the piston pipe. An O-shaped seal ring is arranged on the connecting portion of the middle body and the piston pipe, when the piston moves to be at the lowest bottom of the cylinder body, the air hole on the top cover is arranged in front of the O-shaped seal ring. Cleanness of a back compensating chamber of the spring brake chamber is improved, the service life of the whole spring brake chamber is prolonged. The internal-respiration piston type energy storage spring brake chamber is compact in structure, high in working efficiency, long in service life and stable and reliable in operation.

Description

Internal respiration piston type energy storage spring brake chamber

Technical field

The utility model relates to a kind of automobile and uses braking device, and what be specifically related to is a kind of internal respiration spring braking air chamber.

Background technique

As shown in Figure 1; In the prior art, the spring braking air chamber is provided with a rubber base in cylinder base post-compensation chamber, on the end cap of air chamber precompensation chamber, also is provided with a rubber base; Two rubber bases link to each other with a nylon tube, and air chamber precompensation chamber end cap has the direct and atmosphere of vent in addition.During parking braking; Back cavity exhaust, post-compensation chamber are prone to suck foreign material such as dust, silt through precompensation chamber and nylon tube because volume increases the sucking pump effect that produces; And damage inner surface of cylinder block and energy storage spring and y-type seal ring; Can reduce the working life of parking braking part, and nylon tube collides with easily in the vehicle driving process and come off, foreign material such as dust, silt are prone to directly to get into the post-compensation chamber through the pore on the cylinder body and cause that working environment significantly worsens in the cylinder body; Produce phenomenons such as surface tear plucking, energy storage spring rust corrosion, y-type seal ring damage gas leakage, thereby parking braking was lost efficacy in advance.

The model utility content

The technical problem that the utility model will solve is: overcome the deficiency of existing technology, the internal respiration spring braking air chamber of a kind of compact structure, high working efficiency, long service life, stable and reliable operation is provided.

The utility model solves the technological scheme that its technical problem adopted: a kind of internal respiration piston type energy storage spring brake chamber; Middle body with cylinder body, end cap, connection cylinder body and end cap; The piston tube that be provided with energy storage spring, piston in the described cylinder body, links to each other with piston is equipped with blanking cover in the described piston tube, has pore on the top cover of described blanking cover; The exterior of pore and piston tube; Have vent on the described blanking cover, have the gap between blanking cover and the piston tube, the vent on the blanking cover communicates with pore on the top cover through the gap between blanking cover and the piston tube.

Further, described middle body and piston tube joint are provided with the O RunddichtringO, and when piston motion to cylinder body bottommost, the pore on the top cover is positioned at before the O RunddichtringO.

Further; Be provided with diaphragm of rubber, push-plate assembly and return spring in the described end cap; Form the precompensation chamber between described diaphragm of rubber and the end cap; Form ante-chamber between described diaphragm of rubber and the middle body, described cylinder body is separated into back cavity and post-compensation chamber by piston, and the O RunddichtringO that middle body is connected with piston tube is between ante-chamber and back cavity.

Further, be provided with one-way valve in the described blanking cover, described one-way valve one end is provided with valve seat and spring.

Further, be connected through seal ring between described blanking cover and the piston tube inwall, the vent on the blanking cover is arranged on before the seal ring, has the space between the blanking cover outer wall of seal ring front end and the piston tube inwall.

Further, pass through seal with O ring between the casing wall of the casing wall of described cylinder body and middle body.

Further, described middle body is positioned at the ante-chamber position and has the preceding vent that communicates with ante-chamber, and described middle body is positioned at the back cavity position and has the back vent that communicates with back cavity.

The beneficial effect of the utility model is: the joint of the utility model piston tube and middle body is provided with an O-ring seals, has guaranteed the sealing of ante-chamber B and back cavity C.Pore of the utility model and vent all are arranged on the blanking cover, breathing structure such as one-way valve is set in piston tube after, make post-compensation chamber gas through one-way valve inspiration and discharge; Unnecessary gas passes through piston tube; Vent on valve seat, one-way valve, blanking cover and pore enter atmosphere through ante-chamber through front-seat pore, no longer carry out through the vent on the end cap; The turbidity test in spring braking air chamber post-compensation chamber have been improved, the working life of having improved whole spring braking air chamber.The utility model compact structure, high working efficiency, long service life, stable and reliable operation.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the prior art constructions schematic representation;

Fig. 2 is the structural representation of the utility model when the parking braking state;

Fig. 3 is the enlarged diagram at E place among Fig. 2;

Wherein: 1. return spring, 2. push-plate assembly, 3. diaphragm of rubber, 4. in body, 5.O shape circle, 6.O RunddichtringO; 7. energy storage spring, 8. cylinder body, 10. piston, 11.Y RunddichtringO, 12. piston tube, 13. end caps; 14. blanking cover, 15. pores, 16. one-way valves, 17. valve seats, 18. springs, 19. vents; 21. preceding vent, 22. back vents, A. precompensation chamber, B. ante-chamber, C. back cavity, D. post-compensation chamber.

Embodiment

Combine accompanying drawing that the utility model is further described now.The schematic representation that these accompanying drawings are simplification is only explained the basic structure of the utility model in a schematic way, so it only shows the formation relevant with the utility model.

Shown in Figure 3 like Fig. 2, a kind of internal respiration piston type energy storage spring brake chamber has cylinder body 8, end cap 13, connects the middle body 4 of cylinder body 8 and end cap 13, seals through O shape circle 5 between the casing wall of the casing wall of cylinder body 8 and middle body 4.

Be provided with diaphragm of rubber 3, push-plate assembly 2 and return spring 1 in the end cap 13; Form precompensation chamber A between diaphragm of rubber 3 and the end cap 13; Form ante-chamber B between diaphragm of rubber 3 and the middle body 4; Cylinder body 8 is separated into back cavity C and post-compensation chamber D by piston 10, and middle body 4 is positioned at ante-chamber B position and has the preceding vent 21 that communicates with ante-chamber B, and middle body 4 is positioned at back cavity C position and has the back vent 22 that communicates with back cavity C.

The piston tube 12 that be provided with energy storage spring 7, piston 10 in the cylinder body 8, links to each other with piston 10 is tightly connected through y-type seal ring 11 between piston 10 and cylinder body 8 inwalls.

Blanking cover 14 is housed in the piston tube 12; Have pore 15 on the top cover of blanking cover 14, the exterior of pore 15 and piston tube 12 has vent 19 on the blanking cover 14; Be connected through seal ring between blanking cover 14 and piston tube 12 inwalls; Vent 19 on the blanking cover 14 is arranged on before the seal ring, has the space between blanking cover 14 outer walls of seal ring front end and piston tube 12 inwalls, and the vent 19 on the blanking cover 14 communicates with pore 15 on the top cover through the gap between blanking cover 14 and the piston tube 12.Be provided with one-way valve 16 in the blanking cover 14, one-way valve 16 1 ends are provided with valve seat 17 and spring 18.Middle body 4 is provided with O RunddichtringO 6 with piston tube 12 joints, and the O RunddichtringO 6 that middle body 4 is connected with piston tube 12 is between ante-chamber B and back cavity C, and when piston 10 moved to cylinder body 8 bottommosts, the pore 15 on the top cover was positioned at before the O RunddichtringO 6.

When vehicle is removed parking braking; Back cavity C charges into pressurized air through back vent 22; Piston 10 compressed energy-storage springs 7 are to the motion of cylinder body 8 bottoms, and post-compensation chamber D volume reduces, and unnecessary gas is through piston tube 12; Vent 19 on valve seat 17, one-way valve 16, blanking cover 14 and pore 15 enter atmosphere through ante-chamber B through front-seat pore 21.

When carrying out parking braking, back cavity C dies, and energy storage spring 7 discharges; Promote piston 10 and move to middle body 4 directions, post-compensation chamber D volume increases, and forms negative pressure; Produce inspiratory phenomenon, inspiration gas gets into from ante-chamber B, through pore 15 and the vent 19 on the blanking cover 14; Flow through one-way valve 16 and valve seat 17 after piston tube 12 gets into post-compensation chamber D, guarantee the work of piston 10.

Because of sucking gas from braking line; Through the filtration of one-way valve 16 braking members such as class such as valve such as grade, prevented that foreign material such as silt from sneaking into post-compensation air cavity D, greatly improved the working environment of parking braking chamber piston 10; Protected inner surface of cylinder block; Make the y-type seal ring 11 on the piston 10 obtain long-term sufficient lubricating, thereby guaranteed the task performance of spring braking air chamber, further improved its working life.

Piston tube 12 is provided with an O-ring seals 6 with the joint of middle body 4, has guaranteed the sealing of ante-chamber B and back cavity C.Be provided with spring 18 at one-

way valve

16 and 17 of valve seats; When the need service brake when inflate in the B chamber; The gas pressure of ante-chamber B is on one-way valve 16; One-way valve 16 overcomes the drag throttle down of spring 18, prevents that the Pneumatic pipe cleaner of ante-chamber B from crossing piston tube 12 entering post-compensation chamber D destruction brakings, has guaranteed the validity of braking.

The utility model is greatly improved the spring braking air chamber working life, and task performance has also had corresponding lifting, has the excellent popularization using value.The utility model compact structure, high working efficiency, long service life, stable and reliable operation.

With above-mentioned desirable embodiment according to the utility model is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this model utility technological thought.The technical scope of this model utility is not limited to the content on the specification, must confirm its technical scope according to the claim scope.

Claims

1. internal respiration piston type energy storage spring brake chamber; Middle body (4) with cylinder body (8), end cap (13), connection cylinder body (8) and end cap (13); The piston tube (12) that be provided with energy storage spring (7), piston (10) in the described cylinder body (8), links to each other with piston (10); It is characterized in that: blanking cover (14) is housed in the described piston tube (12); Have pore (15) on the top cover of described blanking cover (14), the exterior of pore (15) and piston tube (12) has vent (19) on the described blanking cover (14); Have the gap between blanking cover (14) and the piston tube (12), the vent (19) on the blanking cover (14) communicates with pore (15) on the top cover through the gap between blanking cover (14) and the piston tube (12).

2. internal respiration piston type according to claim 1 energy storage spring brake chamber; It is characterized in that: body (4) is provided with O RunddichtringO (6) with piston tube (12) joint in described; When piston (10) moved to cylinder body (8) bottommost, the pore on the top cover (15) was positioned at O RunddichtringO (6) before.

3. internal respiration piston type according to claim 2 energy storage spring brake chamber; It is characterized in that: be provided with diaphragm of rubber (3), push-plate assembly (2) and return spring (1) in the described end cap (13); Form precompensation chamber (A) between described diaphragm of rubber (3) and the end cap (13); Form ante-chamber (B) between described diaphragm of rubber (3) and the middle body (4); Described cylinder body (8) is separated into back cavity (C) and post-compensation chamber (D) by piston (10), and the O RunddichtringO (6) that middle body (4) is connected with piston tube (12) is positioned between ante-chamber (B) and the back cavity (C).

4. internal respiration piston type according to claim 1 energy storage spring brake chamber, it is characterized in that: be provided with one-way valve (16) in the described blanking cover (14), described one-way valve (16) one ends are provided with valve seat (17) and spring (18).

5. internal respiration piston type according to claim 1 energy storage spring brake chamber; It is characterized in that: be connected through seal ring between described blanking cover (14) and piston tube (12) inwall; Vent (19) on the blanking cover (14) is arranged on before the seal ring, has the space between the blanking cover of seal ring front end (14) outer wall and piston tube (12) inwall.

6. internal respiration piston type according to claim 1 energy storage spring brake chamber is characterized in that: between the casing wall of the casing wall of described cylinder body (8) and middle body (4) through O shape circle (5) sealing.

7. internal respiration piston type according to claim 3 energy storage spring brake chamber; It is characterized in that: described middle body (4) is positioned at ante-chamber (B) position and has the preceding vent (21) that communicates with ante-chamber (B), and described middle body (4) is positioned at back cavity (C) position and has the back vent (22) that communicates with back cavity (C).