CN202132420U - Spring brake chamber adopting internal respiration - Google Patents
Spring brake chamber adopting internal respiration Download PDFInfo
- Publication number
- CN202132420U CN202132420U CN201120193425U CN201120193425U CN202132420U CN 202132420 U CN202132420 U CN 202132420U CN 201120193425 U CN201120193425 U CN 201120193425U CN 201120193425 U CN201120193425 U CN 201120193425U CN 202132420 U CN202132420 U CN 202132420U
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- Prior art keywords
- piston
- lip
- blanking cover
- cylinder body
- piston tube
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Abstract
The utility model relates to a spring brake chamber adopting internal respiration. The spring brake chamber is provided with a cylinder body, an end cover, and a middle body for connecting the cylinder body and the end cover, wherein an energy storage spring, a piston and a piston pipe connected with the piston are arranged in the cylinder body; a double-lip sealing ring capable of performing two-way sealing is arranged at the connecting part between the middle body and the piston pipe, and is provided with a front sealing lip and a rear sealing lip; an air hole formed on the piston pipe is positioned between the front and the rear sealing lips of the double-lip sealing ring when the piston moves to the utmost bottom of the cylinder body; and a blanking cover with an air vent formed thereon is mounted in the piston pipe, a gap is formed between the blanking cover and the piston pipe, and the air vent on the blanking cover is communicated with the air hole on the piston pipe via the gap between the blanking cover and the piston pipe. By adopting the spring brake chamber provided by the utility model, the brake safety of a vehicle is ensured, a rear compensating cavity of the spring brake chamber becomes cleaner, and the service life of the entire spring brake chamber is prolonged.
Description
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; But body and piston tube joint are provided with the double-lip sealing ring of two way sealed in described, and described double-lip sealing ring has preceding sealing lip and back sealing lip, has pore on the described piston tube; When piston motion to cylinder body bottommost, the pore on the piston tube is between the preceding sealing lip and back sealing lip of double-lip sealing ring.
Further, the preceding sealing lip of described double-lip sealing ring is Y shape sealing lip with the back sealing lip.
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 distance of preceding sealing lip to the ante-chamber of described double-lip sealing ring is less than the distance of back sealing lip 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: the utility model is provided with double-lip sealing ring in middle body after; 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, has guaranteed the vehicle braked Safety performance.The utility model is provided with the one-way valve breathing structure 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, 6. double-lip sealing ring; 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, 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.
But middle body 4 and piston tube 12 joints are provided with the double-lip sealing ring 6 of two way sealed; Double-lip sealing ring 6 has preceding sealing lip and back sealing lip; The preceding sealing lip of double-lip sealing ring 6 is Y shape sealing lip with the back sealing lip, and the preceding sealing lip of double-lip sealing ring 6 to the distance of ante-chamber B is less than the distance of back sealing lip to ante-chamber B.
Have pore 15 on the piston tube 12, when piston 10 moved to cylinder body 8 bottommosts, the pore 15 on the piston tube 12 was between the preceding sealing lip and back sealing lip of double-lip sealing ring 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; 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 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.
Piston tube 12 is provided with double-lip sealing ring 6 with the joint of middle body 4; 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, if the spring braking air chamber uses for a long time, after y-type seal ring 11 wearing and tearing have slight gas leakage; The body that leaks gas also can pass through piston tube 12, valve seat 17, one-way valve 16, vent 19, pore 15 and discharge near the preceding sealing lip of the side of ante-chamber B from double-lip sealing ring 6; Can not avoid making vehicle to be in the state of the non-brake of seemingly braking, reduce braking hub and brake shoe wearing and tearing and intensification because of the y-type seal ring 11 D build-up pressure that slightly leaks gas in the post-compensation chamber.
Be provided with spring 18 at one- way valve 16 and 17 of valve seats; When damaging appears in double-lip sealing ring 6; Air gets into ante-chamber B through preceding vent 21, and the gas pressure of ante-chamber B is on one-way valve 16, and one-way valve 16 overcomes the drag throttle down of spring 18; The Pneumatic pipe cleaner that prevents ante-chamber B is crossed piston tube 12 entering post-compensation chamber D destruction brakings, thereby makes 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 (8)
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: body (4) and piston tube (12) in described but the joint is provided with the double-lip sealing ring (6) of two way sealed, described double-lip sealing ring (6) has preceding sealing lip and back sealing lip, has 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 the preceding sealing lip and back sealing lip of double-lip sealing ring (6).
2. a kind of internal respiration spring braking air chamber according to claim 1 is characterized in that: the preceding sealing lip of described double-lip sealing ring (6) is Y shape sealing lip with the back sealing lip.
3. a kind of 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 preceding sealing lip to the ante-chamber (B) of described double-lip sealing ring (6) is less than the distance of back sealing lip to ante-chamber (B).
4. a kind of 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 (12), 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).
5. a kind of internal respiration spring braking air chamber according to claim 4 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).
6. a kind of internal respiration spring braking air chamber according to claim 4; 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.
7. a kind of 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).
8. a kind of internal respiration spring braking air chamber according to claim 3; 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120193425U CN202132420U (en) | 2011-06-10 | 2011-06-10 | Spring brake chamber adopting internal respiration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120193425U CN202132420U (en) | 2011-06-10 | 2011-06-10 | Spring brake chamber adopting internal respiration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202132420U true CN202132420U (en) | 2012-02-01 |
Family
ID=45521187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120193425U Expired - Lifetime CN202132420U (en) | 2011-06-10 | 2011-06-10 | Spring brake chamber adopting internal respiration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202132420U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012164587A2 (en) * | 2011-05-26 | 2012-12-06 | Wabco India Limited | Internal breather valve for spring brake actuators |
-
2011
- 2011-06-10 CN CN201120193425U patent/CN202132420U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012164587A2 (en) * | 2011-05-26 | 2012-12-06 | Wabco India Limited | Internal breather valve for spring brake actuators |
| WO2012164587A3 (en) * | 2011-05-26 | 2013-06-27 | Wabco India Limited | Internal breather valve for spring brake actuators |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170105 Address after: Wujin Nanxiashu street Jiangsu city Changzhou province 213000 ryushi Road No. 55 Patentee after: Jiangsu Hengxin sunthone Technology Co. Ltd. Address before: 213155 Dongan City, Jiangsu province Wujin District, the town of post circuit number 10-1 Patentee before: Jiang Guofen |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120201 |
|
| CX01 | Expiry of patent term |