CN204250021U - A kind of dust-proof foot brake valves - Google Patents
A kind of dust-proof foot brake valves Download PDFInfo
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- CN204250021U CN204250021U CN201420679410.9U CN201420679410U CN204250021U CN 204250021 U CN204250021 U CN 204250021U CN 201420679410 U CN201420679410 U CN 201420679410U CN 204250021 U CN204250021 U CN 204250021U
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- piston
- dust
- joystick
- valve casing
- foot brake
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Abstract
The utility model discloses a kind of dust-proof foot brake valves, comprise valve casing and joystick, the top of valve casing is provided with dust boot, the upper surface of dust boot is concordant with the top of valve casing, the central authorities of dust boot offer the through hole that can pass for joystick, the top peripheral border of joystick offers draw-in groove, the middle part of dust boot snaps in draw-in groove, the inside of valve casing is provided with plunger shaft, piston is provided with in plunger shaft, ventilative gap is there is between dust boot and the inwall of valve casing, piston is connected with joystick, the bottom of piston is provided with blow off valve, deflation hole piston being also provided with the containing cavity relative with exhaust valve positions and being communicated with containing cavity, deflation hole communicates with plunger shaft, float ball is provided with in containing cavity, the sphere diameter of float ball is greater than the aperture of deflation hole.The utility model improves the anti-dust performance of foot brake valves effectively, extends its service life in the presence of a harsh environment.
Description
Technical field
The utility model relates to a kind of foot brake valves, particularly relates to a kind of dust-proof foot brake valves.
Background technology
In foot brake valves working process, be deposited in pollutants on dust boot and can enter into the inside of foot brake valves along with the aspiratory action of piston, and the requirement of foot valve valve casing to cleanliness level itself is very high, dust enters the appearance that foot brake valves leakage phenomenon can be caused in valve casing inside, the air pressure of valve casing inside is reduced, cause foot brake valves to lose efficacy, affect the deceleration and stopping performance of automobile.At present, on foot brake valves, existing a kind of dust-tight manner is: arrange a respiration channel be connected with admission port with the piston of foot brake valves respectively in valve casing inside, and arrange a valve at admission port place, during braking, discharged valve casing by pressure gas by respiration channel in piston, brake off moment, valve one end is softened, seal up admission port, now, gas adds in piston by dust boot, and air pressure balances gradually, valve is return gradually, and respiration channel is opened.This kind of mode needs on housing, increase the hole that leads to enclosure interior, adds the probability that pollutants enters housing.In addition, also there is the slow problem of valve response in the dust-tight manner of this kind of form.
As can be seen here, prior art awaits further improving.
Utility model content
The utility model is the weak point avoiding above-mentioned prior art to exist, and provides a kind of dust-proof foot brake valves.
The technical scheme that the utility model adopts is:
A kind of dust-proof foot brake valves, comprise valve casing and joystick, the top of valve casing is provided with dust boot, the upper surface of dust boot is concordant with the top of valve casing, the central authorities of dust boot offer the through hole that can pass for joystick, the top peripheral border of joystick offers draw-in groove, the middle part of dust boot snaps in draw-in groove, the inside of valve casing is provided with plunger shaft, piston is provided with in plunger shaft, ventilative gap is there is between dust boot and the inwall of valve casing, piston is connected with joystick, the bottom of piston is provided with blow off valve, deflation hole piston being also provided with the containing cavity relative with exhaust valve positions and being communicated with containing cavity, deflation hole communicates with plunger shaft, float ball is provided with in containing cavity, the sphere diameter of float ball is greater than the aperture of deflation hole.
Described dust boot is wavy from the cross-sectional plane of central authorities to its edge.
The bottom of described joystick is equipped with rubber spring, the middle part of joystick is provided with the spring perch be connected with rubber spring, rubber spring and spring perch are all positioned at plunger shaft, joystick is also provided with the spring perch steady ring be connected with spring perch, spring perch steady ring is positioned at the top of spring perch, piston inner wall offers the positioning groove relative with spring perch steady ring position, spring perch steady ring snaps in positioning groove.
The inside of described valve casing is provided with piston limit ring, and the below of piston limit ring is provided with packing ring, and piston limit ring and packing ring are all positioned at the upper outside of piston.
The middle part outer race of described piston is equipped with O type circle.
The bottom of described piston is equipped with recoil spring.
Owing to have employed technique scheme, the beneficial effect acquired by the utility model is:
The upper surface of the dust boot 1, in the utility model is concordant with the top of valve casing, match with car load attachment face after installing, can effectively prevent the accumulation of dust from permeating, ensure that the cleanliness level of foot brake valves, avoid the generation of foot brake valves leakage phenomenon, extend foot brake valves service life in the presence of a harsh environment, improve the dirt exclusion capabilities of foot brake valves and the deceleration and stopping performance of automobile.
2, during automobile brake, plunger shaft of the present utility model is compressed, and float ball drops down onto below containing cavity, and deflation hole is opened, and the gas in plunger shaft is normally discharged; When brake off, the cubic expansion of piston intracavity gas, inner formation negative pressure, the top of the gaseous tension overhead containing cavity that float ball is inhaled into, deflation hole is closed, and gas adds in plunger shaft by the ventilative gap between dust boot and valve casing, air pressure balances gradually, float ball falls, and deflation hole is opened, and blow off valve ensure that dust boot can not back down by the air pressure increased sharply instantaneously in piston cavity inside.
3, the utility model structure is simple, and installation and maintenance are convenient, and cost of manufacture is lower.
Accompanying drawing explanation
Fig. 1 of the present utility modelly partly cuts open structural representation.
The view of float ball in the utility model when Fig. 2 is automobile brake.
Fig. 3 is the view of float ball in automobile brake off moment the utility model.
Fig. 4 is the birds-eye view of dust boot in the utility model.
Wherein,
1, dust boot 2, piston limit ring 3, packing ring 4, O type circle 5, recoil spring 6, valve casing 7, blow off valve 8, float ball 9, containing cavity 10, deflation hole 11, piston 12, plunger shaft 13, rubber spring 14, spring perch 15, spring perch steady ring 16, joystick 17, draw-in groove 18, positioning groove 19, through hole
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail, but the utility model is not limited to these embodiments.
As shown in Figures 1 to 4, a kind of dust-proof foot brake valves, comprise valve casing 6 and joystick 16, the top of valve casing 6 is provided with dust boot 1, the upper surface of dust boot 1 is concordant with the top of valve casing 6, the accumulation of dust is prevented to permeate, the central authorities of dust boot 1 offer the through hole 19 that can pass for joystick 16, dust boot 1 is wavy from the cross-sectional plane of central authorities to its edge, dust boot 1 can with joystick 16 up-and-down movement, wavy dust boot 1 adds its extendible length, make dust boot 1 in the process with joystick 16 up-and-down movement, can not depart from from the installation site valve casing 6 because of the stressed dust boot 1 that makes, the top peripheral border of joystick 16 offers draw-in groove 17, the middle part of dust boot 1 snaps in draw-in groove, the inside of valve casing 6 is provided with plunger shaft, the bottom of described joystick 16 is equipped with rubber spring 13, the middle part of joystick 16 is provided with the spring perch 14 be connected with rubber spring 13, rubber spring 13 and spring perch 14 are all positioned at plunger shaft 12, joystick 16 is also provided with the spring perch steady ring 15 be connected with spring perch 14, spring perch steady ring 15 is positioned at the top of spring perch 14, piston 11 is provided with in described plunger shaft 12, ventilative gap is there is between the inwall of dust boot 1 and valve casing 6, piston 11 is connected with joystick 16 by rubber spring 13, piston 11 inwall offers the positioning groove 18 relative with spring perch steady ring 15 position, spring perch steady ring 15 snaps in positioning groove 18, the inside of valve casing 6 is provided with piston limit ring 2, the below of piston limit ring 2 is provided with packing ring 3, piston limit ring 2 and packing ring 3 are all positioned at the upper outside of piston 11, the middle part outer race of piston 11 is equipped with O type circle 4, the bottom of piston 11 is equipped with recoil spring 5, the bottom of piston 11 is provided with blow off valve 7, the deflation hole 10 piston 11 being also provided with the containing cavity 9 relative with blow off valve 7 position and being communicated with containing cavity 9, deflation hole 10 communicates with plunger shaft 12, float ball 8 is provided with in containing cavity 9, the sphere diameter of float ball 8 is greater than the aperture of deflation hole 10, acting as of blow off valve 7: during automobile brake, plunger shaft 12 is compressed.When brake off moment, plunger shaft 12 cubic expansion, inner formation negative pressure, float ball 8 rises and blocks deflation hole 10, blow off valve 7 is closed, gas is supplemented in valve casing by the gap between dust boot 1 and valve casing 6, and in valve casing, negative pressure balances gradually, and float ball 8 falls, blow off valve 7 is opened, gas enters valve inner by blow off valve 7, and valve inner air pressure and external atmosphere pressure reach balance, ensure that dust boot 1 can not depart from from the installed position valve casing 6.
The part do not addressed in the utility model adopts or uses for reference prior art and can realize.
Although more employ the terms such as piston limit ring 2, recoil spring 5, valve casing 6, containing cavity 9, rubber spring 13, joystick 16 herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Specific embodiment described herein is only to spiritual example explanation of the present utility model.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (6)
1. a dust-proof foot brake valves, comprise valve casing and joystick, the top of valve casing is provided with dust boot, it is characterized in that: the upper surface of dust boot is concordant with the top of valve casing, the central authorities of dust boot offer the through hole that can pass for joystick, the top peripheral border of joystick offers draw-in groove, the middle part of dust boot snaps in draw-in groove, the inside of valve casing is provided with plunger shaft, piston is provided with in plunger shaft, ventilative gap is there is between dust boot and the inwall of valve casing, piston is connected with joystick, the bottom of piston is provided with blow off valve, deflation hole piston being also provided with the containing cavity relative with exhaust valve positions and being communicated with containing cavity, deflation hole communicates with plunger shaft, float ball is provided with in containing cavity, the sphere diameter of float ball is greater than the aperture of deflation hole.
2. the dust-proof foot brake valves of one according to claim 1, is characterized in that: described dust boot is wavy from the cross-sectional plane of central authorities to its edge.
3. the dust-proof foot brake valves of one according to claim 1, it is characterized in that: the bottom of described joystick is equipped with rubber spring, the middle part of joystick is provided with the spring perch be connected with rubber spring, rubber spring and spring perch are all positioned at plunger shaft, joystick is also provided with the spring perch steady ring be connected with spring perch, spring perch steady ring is positioned at the top of spring perch, and piston inner wall offers the positioning groove relative with spring perch steady ring position, spring perch steady ring snaps in positioning groove.
4. the dust-proof foot brake valves of one according to claim 1, is characterized in that: the inside of described valve casing is provided with piston limit ring, and the below of piston limit ring is provided with packing ring, and piston limit ring and packing ring are all positioned at the upper outside of piston.
5. the dust-proof foot brake valves of the one according to claim 1 or 4, is characterized in that: the middle part outer race of described piston is equipped with O type circle.
6. the dust-proof foot brake valves of one according to claim 5, is characterized in that: the bottom of described piston is equipped with recoil spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420679410.9U CN204250021U (en) | 2014-11-14 | 2014-11-14 | A kind of dust-proof foot brake valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420679410.9U CN204250021U (en) | 2014-11-14 | 2014-11-14 | A kind of dust-proof foot brake valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204250021U true CN204250021U (en) | 2015-04-08 |
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ID=52954353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420679410.9U Active CN204250021U (en) | 2014-11-14 | 2014-11-14 | A kind of dust-proof foot brake valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204250021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107839680A (en) * | 2017-09-22 | 2018-03-27 | 威伯科汽车控制系统（中国）有限公司 | A kind of foot brake valves of relay piston component and adjustable output air pressure pressure difference |
-
2014
- 2014-11-14 CN CN201420679410.9U patent/CN204250021U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107839680A (en) * | 2017-09-22 | 2018-03-27 | 威伯科汽车控制系统（中国）有限公司 | A kind of foot brake valves of relay piston component and adjustable output air pressure pressure difference |
| CN107839680B (en) * | 2017-09-22 | 2019-07-23 | 威伯科汽车控制系统（中国）有限公司 | A kind of foot brake valves of relay piston component and adjustable output air pressure pressure difference |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.917 Weihe Road, Qingdao Economic and Technological Development Zone, Shandong Province 266510 Patentee after: ZF commercial vehicle systems (Qingdao) Co.,Ltd. Address before: No.917 Weihe Road, Qingdao Economic and Technological Development Zone, Shandong Province 266510 Patentee before: Wabco (China) Co.,Ltd. |