CN202100636U

CN202100636U - Internal respiration spring braking gas chamber

Info

Publication number: CN202100636U
Application number: CN2011201934157U
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 spring braking gas chamber, which comprises a cylinder body, an end cover and an intermediate body connected with the cylinder body and the end cover. An energy storage spring, a piston and a piston pipe connected with the piston are arranged in the cylinder body, the connection part of the intermediate body and the piston pipe are provided with a front O-shaped sealing ring and a rear O-shaped sealing ring, the piston pipe is provided with a gas hole, and when the piston moves to the bottom of the cylinder body, the gas hole on the piston pipe is positioned between the front O-shaped sealing ring and the rear O-shaped sealing ring. A plug cover is arranged in the piston pipe and is provided with a ventilation hole, a clearance is formed between the plug cover and the piston pipe, and the ventilation hole on the plug cover is communicated with the gas hole on the piston pipe through the clearance between the plug cover and the piston pipe. The braking safety of a vehicle can be better ensured. The cleanness of the rear compensation cavity of the spring braking gas chamber can be improved, and the service life of the whole spring braking gas chamber can be prolonged.

Description

Internal respiration spring braking air 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 spring braking air 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; O RunddichtringO and back O RunddichtringO before body and piston tube joint are provided with in described; Have pore on the described piston tube, when piston motion to cylinder body bottommost, the pore on the piston tube is between preceding O RunddichtringO and back O RunddichtringO.

Further; Be provided with diaphragm of rubber, push-plate assembly and return spring in the described end cap; Described diaphragm of rubber and end cap and between form the precompensation chamber; 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 distance of described preceding O RunddichtringO to ante-chamber is less than the distance of back O RunddichtringO to ante-chamber.

Further, in the described piston tube blanking cover is housed, has vent on the blanking cover, have the gap between blanking cover and the piston tube, the vent on the blanking cover communicates with pore on the piston tube through the gap between blanking cover and the piston tube.

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 two seal rings between described blanking cover and the piston tube inwall, the vent on the blanking cover is arranged between two seal rings, has the space between blanking cover outer wall between two seal rings 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: O RunddichtringO and back O RunddichtringO before the middle body of the utility model is provided with; Can guarantee the sealing of ante-chamber and back cavity to the post-compensation chamber; Can guarantee that again unnecessary air can thoroughly drain through ante-chamber in the post-compensation chamber; Can also stop the pressurized air that in the time need carrying out service brake, charges into ante-chamber to get into one-way valve through the pore on the piston tube; Reduce the motion frequency of one-way valve, and then reduce the possibility that one-way valve lost efficacy, guaranteed the vehicle braked Safety performance more.The utility model is provided with breathing structures such as one-way valve in piston tube after; Make post-compensation chamber gas through one-way valve inspiration and discharge; No longer carry out, improved the turbidity test in spring braking air chamber post-compensation chamber, the working life of having improved whole spring braking air chamber through the vent on the end cap.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;

Fig. 4 is the structural representation of the utility model when removing the parking braking state;

Fig. 5 is the structural representation at F place among Fig. 4;

Wherein: 1. return spring, 2. push-plate assembly, 3. diaphragm of rubber, 4. in body, 5.O shape circle, O RunddichtringO before the 6-1., O RunddichtringO behind the 6-2.; 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 5 like Fig. 2 Fig. 3 Fig. 4; A kind of internal respiration spring braking air 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; 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; Be tightly connected through y-type seal ring 11 between piston 10 and cylinder body 8 inwalls, 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.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.

O RunddichtringO 6-1 and back O RunddichtringO 6-2 before middle body 4 is provided with piston tube 12 joints; Have pore 15 on the piston tube 12; When piston 10 moves to cylinder body 8 bottommosts; Pore 15 on the piston tube 12 between preceding O RunddichtringO 6-1 and back O RunddichtringO 6-2, preceding O RunddichtringO 6-1 to the distance of ante-chamber B less than the distance of back O RunddichtringO 6-2 to ante-chamber B.

Blanking cover 14 is housed in the piston tube 12; Have vent 19 on the blanking cover 14; 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, are connected through two seal rings between blanking cover 14 and piston tube 12 inwalls, and the vent 19 on the blanking cover 14 is arranged between two seal rings; Have the space between blanking cover 14 outer walls between two seal rings and piston tube 12 inwalls, the vent 19 on the blanking cover 14 communicates with pore 15 on the piston tube 12 through the gap between blanking cover 14 and the piston tube 12.

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; Through the vent 19 on valve seat 17, one-way valve 16, the blanking cover 14, the pore 15 on the piston tube 12, enter atmosphere through the preceding vent 21 of ante-chamber B.

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 the preceding vent 21 of ante-chamber B, through the pore 15 on the piston tube 12, 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; Cylinder body 8 internal surfaces have been protected; 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.

Middle body 4 is provided with promptly preceding O RunddichtringO 6-1 of two seal rings and back O RunddichtringO 6-2; Can guarantee ante-chamber B and back cavity C sealing to post-compensation chamber D; Can guarantee that again unnecessary air can thoroughly drain through ante-chamber B among the D of post-compensation chamber; Can also stop the pressurized air that in the time need carrying out service brake, charges into ante-chamber B to get into one-way valve 16 through the pore on the piston tube 12 15; Reduce the motion frequency of one-way valve 16, and then reduce the possibility that one-way valve 16 lost efficacy, guaranteed the vehicle braked Safety performance more.

Be provided with spring 18 at one-

way valve

16 and 17 of valve seats; When one of them occurs damaging among preceding O RunddichtringO 6-1 on the central body 4 and the back O RunddichtringO 6-2; Air gets into one-way valve 16 through the pore on the piston tube 12 15, and gas pressure is on one-way valve 16, and one-way valve 16 overcomes the drag throttle down of spring 18; Prevent that pressurized air from getting into post-compensation chamber D and destroying braking, thereby make vehicle driving safer.

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 spring braking air 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: O RunddichtringO (6-1) and back O RunddichtringO (6-2) before body (4) is provided with piston tube (12) joint in described; Have pore (15) on the described piston tube (12), when piston (10) moved to cylinder body (8) bottommost, the pore (15) on the piston tube (12) was positioned between preceding O RunddichtringO (6-1) and the back O RunddichtringO (6-2).

2. internal respiration spring braking air chamber according to claim 1; 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 distance of described preceding O RunddichtringO (6-1) to ante-chamber (B) is less than the distance of back O RunddichtringO (6-2) to ante-chamber (B).

3. internal respiration spring braking air chamber according to claim 1; It is characterized in that: blanking cover (14) is housed in the described piston tube (12); Have vent (19) on the blanking cover (14); Have the gap between blanking cover (14) and the piston tube (19), the vent (19) on the blanking cover (14) communicates with pore (15) on the piston tube (12) through the gap between blanking cover (14) and the piston tube (12).

4. internal respiration spring braking air chamber according to claim 3 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 spring braking air chamber according to claim 3; It is characterized in that: be connected through two seal rings between described blanking cover (14) and piston tube (12) inwall; Vent (19) on the blanking cover (14) is arranged between two seal rings, has the space between blanking cover (14) outer wall between two seal rings and piston tube (12) inwall.

6. internal respiration spring braking air chamber according to claim 1 is characterized in that: seal through O shape circle (5) between the casing wall of the casing wall of described cylinder body (8) and middle body (4).

7. internal respiration spring braking air chamber according to claim 2; 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).