CN102840256B - Spring braking cylinder internal respiration structure - Google Patents
Spring braking cylinder internal respiration structure Download PDFInfo
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- CN102840256B CN102840256B CN201210265120.5A CN201210265120A CN102840256B CN 102840256 B CN102840256 B CN 102840256B CN 201210265120 A CN201210265120 A CN 201210265120A CN 102840256 B CN102840256 B CN 102840256B
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- stuffing box
- box gland
- way valve
- spring
- piston bar
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Abstract
The invention discloses a spring braking cylinder internal respiration structure which comprises a cylindrical piston rod which is arranged inside a braking cylinder body, the rear end of the piston rod is sealed, a cylindrical sealing sleeve is arranged at the rear end of an inner cavity of the piston rod, the front end of the sealing sleeve is provided with a front cover and the rear end of the sealing sleeve is provided with an opening, a one-way valve is arranged inside an inner cavity of the sealing sleeve, a return spring is arranged between the front cover of the sealing sleeve and the one-way valve, a respiration front cavity is formed between the front cover of the sealing sleeve and the one-way valve, a respiration rear cavity is formed between the one-way valve and the bottom face of the inner cavity of the piston rod, the center of the front cover of the sealing sleeve is provided with an air vent which is communicated from front to back, an aeration space is arranged between the outer wall of the one-way valve and the inner wall of the piston rod, and a respiration hole which is communicated with the rear respiration cavity is arranged on the piston rod. The internal respiration structure is used in a spring braking cylinder, the matching is close, and sealing performance is good.
Description
Technical field
The present invention relates to a kind of breathing structure of piston type spring brake cylinder.
Background technique
Prior art is the UNICOM that directly realizes parking chamber and air by the pore on cylinder body, easily causes airborne waste flow to enter the bottom of parking chamber piston, make piston cavity wearing and tearing, and granule can cause piston hair fastener, gas leakage.
The patent No. is that the Chinese invention patent of CN200620104566.X discloses a kind of breathing apparatus in spring brake cylinder, comprise inhalation valve, inhalation valve comprises piston rod and the targeting part of establishing push rod, piston rod by seal ring and the active cross-under of Y type one-way sealing seal in targeting part, piston rod front end inside is embedded with check ring, between check ring and push rod, be fixed with the one-way sealing seat of cup-shaped, between one-way sealing seat and push rod, be provided with cavity one, and be provided with seal ring between piston rod inwall, one-way sealing seat bottom is provided with the pore being communicated with one-way sealing seat internal cavities, in described one-way sealing seat, be provided with one-way sealing seal, between one-way sealing seat and one-way sealing seal, be also provided with Compress Spring, between one-way sealing seat and one-way sealing seal sidewall, be provided with the gap that is communicated with one-way sealing seat and the formed cavity two of one-way sealing seal and described cavity one, described piston rod sidewall is also provided with the pore being communicated with cavity one.Although its good airproof performance, usability and working life have much room for improvement.
Summary of the invention
It is tight that technical problem to be solved by this invention is just to provide a kind of cooperation, good airproof performance, the piston type spring brake cylinder internal respiration structure of long service life.
For solving the problems of the technologies described above, the present invention adopts following technological scheme: a kind of spring brake cylinder internal respiration structure, comprise the trunk piston bar of being located in brake cylinder body, piston rod back-end closure, it is characterized in that: described piston rod cavity rear end is provided with tubular stuffing box gland, stuffing box gland front end is provided with protecgulum and open rearward end, in described stuffing box gland inner chamber, be provided with one-way valve, between described stuffing box gland protecgulum and one-way valve, be provided with return spring, between described stuffing box gland protecgulum and one-way valve, surround breathing ante-chamber, between described one-way valve and piston rod cavity bottom surface, surround breathing back cavity, the vent connecting before and after described stuffing box gland protecgulum center is provided with, between described one-way valve outer wall and piston rod inwall, be provided with airspace, described piston rod is provided with and is communicated with the spiracle of breathing back cavity.
As preferably, described stuffing box gland rear end is provided with the step of a decline, described step and piston rod inwall surround venting cavity, described spiracle is a straight hole and is communicated with venting cavity is anterior, is provided with clearance space and makes to breathe back cavity and be communicated with venting cavity rear portion between described stuffing box gland rear end and piston rod cavity bottom surface.
As preferably, described stuffing box gland front end is by the packing ring screens being installed in piston rod inwall annular groove, and described stuffing box gland front end outer wall seals with piston rod internal ring wall along being circumferentially with seal ring.
As preferably, before described stuffing box gland, the center of cover back-end and one-way valve front end is respectively equipped with the mounting hole of return spring.
As preferably, described stuffing box gland protecgulum front end is provided with the groove of ring-type around vent, in described groove, be provided with stiffening rib.
As preferably, center, described one-way valve rear end is provided with a cylinder table, and described piston rod cavity bottom center is provided with boss, and described cylinder table rear end apical grafting is on boss.
As preferably, in the middle part of described cylinder body, be provided with a valve body, described piston rod, through valve body, is provided with an O shape sealing and a y-shaped ring from front to back successively between described valve body and piston rod.
Spring brake cylinder of the present invention has adopted internal respiration structure, and it coordinates closely, good airproof performance.Compared with prior art, there is following obvious advantage:
(1) the present invention has improved the adaptability of environment.
(2) the present invention has improved the working life of product.
(3) the anti-piston rod of the present invention and piston push rod combine as a whole, and can effectively prevent loosening the coming off of producing of scyewed joint.
(4) piston rod of the present invention adopts aluminum alloy, makes product lightweight.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is the schematic diagram of internal respiration structure of the present invention;
Fig. 2 is K place structure enlarged view in Fig. 1.
Embodiment
Below in conjunction with Fig. 1 and Fig. 2, illustrate the embodiment of a kind of spring brake cylinder internal respiration of the present invention structure, comprise the trunk piston bar 7 of being located in brake cylinder body 5, piston rod back-end closure, described piston rod cavity rear end is provided with tubular stuffing box gland 11, stuffing box gland front end is provided with protecgulum and open rearward end, in described stuffing box gland inner chamber, be provided with one-way valve 10, between described stuffing box gland protecgulum and one-way valve, be provided with return spring 9, between described stuffing box gland protecgulum and one-way valve, surround and breathe ante-chamber D, between described one-way valve and piston rod cavity bottom surface, surround and breathe back cavity E, the vent 21 connecting before and after described stuffing box gland protecgulum center is provided with, between described one-way valve outer wall and piston rod inwall, be provided with airspace 31, described piston rod is provided with and is communicated with the spiracle a that breathes back cavity.Described stuffing box gland rear end is provided with the step 12 of a decline, described step and piston rod inwall surround venting cavity, described spiracle is a straight hole and is communicated with venting cavity is anterior, is provided with clearance space b and makes to breathe back cavity and be communicated with venting cavity rear portion between described stuffing box gland rear end and piston rod cavity bottom surface.Described stuffing box gland front end is by packing ring 8 screens that are installed in piston rod inwall annular groove, described stuffing box gland front end outer wall is along being circumferentially with seal ring and the sealing of piston rod internal ring wall, and before described stuffing box gland, the center of cover back-end and one-way valve front end is respectively equipped with the mounting hole of return spring.
Described stuffing box gland protecgulum front end is provided with the groove 20 of ring-type around vent, in described groove, be provided with stiffening rib.Center, described unidirectional rear end is provided with a cylinder table 30, and described piston rod cavity bottom center is provided with boss, and described cylinder table rear end apical grafting is on boss.Described cylinder body middle part is provided with a valve body 1, and described piston rod, through valve body, is provided with an O-ring seals 4 and a y-shaped ring 3 from front to back successively between described valve body and piston rod.
In cylinder body 5, be provided with brake spring 6, brake spring 6 is positioned at brake spring chamber A, has piston 2 on brake spring 6, and on piston 2, with piston rod 7, inner chamber of cylinder block has been divided into driving chamber C and parking chamber B by valve body 1.Valve body is provided with the first suction port d being communicated with parking chamber B and the second suction port e being communicated with driving chamber C.
When vehicle is removed parking braking, gas unnecessary in the A of brake spring chamber, by piston rod 7, through the middle vent 21 of stuffing box gland 11 and one-way valve 10 side clearancies, flows to the spiracle a of piston rod 7, enters driving chamber C and enters atmosphere; When carrying out parking braking, brake spring chamber A need carry out tonifying Qi, the gas of driving chamber C is by the spiracle a of piston rod 7, gap through one-way valve 10 and stuffing box gland 11, through piston rod 7, enter brake spring chamber A again, guaranteed the smooth work of piston, 1 of piston rod 7 and valve body are provided with O-ring seals 4 and y-shaped ring 3, O-ring seals 4 plays seal action, prevents collaborating and gas leak phenomenon between two chambeies.Y-shaped ring 3 plays the one-way sealing of driving chamber C and parking chamber B, a small amount of residual air of brake spring chamber A flow to driving chamber C by the single effect of y-shaped ring 3, enter atmosphere, in the middle of one-way valve 10 and stuffing box gland 11, be provided with return spring 9, when damaging appears in y-shaped ring 3, the pressurized air of driving chamber C is used on one-way valve 10, overcomes the elastic force throttle down of return spring 9, the pressurized air of chamber C of preventing from driving a vehicle enters brake spring chamber A, makes automobile normal running.
Owing to having adopted internal respiration structure of the present invention, there is corresponding raising the working life of piston type spring brake cylinder.
Claims (6)
1. a spring brake cylinder internal respiration structure, comprise brake cylinder body (5), in described brake cylinder body (5), be provided with brake spring (6), described brake spring (6) is positioned at brake spring chamber (A), on described brake spring (6), there is piston (2), described piston (2) is upper with trunk piston bar (7), the sealing of trunk piston rod rear end, it is characterized in that: trunk piston bar intracavity posterior end is provided with tubular stuffing box gland (11), tubular stuffing box gland front end is provided with protecgulum and open rearward end, in tubular stuffing box gland inner chamber, be provided with one-way valve (10), between tubular stuffing box gland protecgulum and one-way valve, be provided with return spring (9), between tubular stuffing box gland protecgulum and one-way valve, surround and breathe ante-chamber (D), between described one-way valve and trunk piston bar inner chamber bottom surface, surround and breathe back cavity (E), the vent (21) connecting before and after tubular stuffing box gland protecgulum center is provided with, between one-way valve outer wall and trunk piston bar inwall, be provided with airspace (31), described trunk piston bar is provided with and is communicated with the spiracle (a) of breathing back cavity (E), described tubular stuffing box gland (11) rear end is provided with the step (12) of a decline, described step and trunk piston bar inwall surround venting cavity, described spiracle (a) is a straight hole and is communicated with venting cavity is anterior, between tubular stuffing box gland rear end and trunk piston bar inner chamber bottom surface, being provided with clearance space (b) makes to breathe back cavity (E) and is communicated with venting cavity rear portion.
2. a kind of spring brake cylinder internal respiration structure according to claim 1, it is characterized in that: described tubular stuffing box gland (11) front end is by packing ring (8) screens being installed in trunk piston bar inwall annular groove, and tubular stuffing box gland front end outer wall is along being circumferentially with seal ring and trunk piston bar inner wall sealing.
3. a kind of spring brake cylinder internal respiration structure according to claim 1, is characterized in that: the center of the front cover back-end of tubular stuffing box gland (11) and one-way valve front end is respectively equipped with the mounting hole of return spring (9).
4. according to a kind of spring brake cylinder internal respiration structure described in claims 1 to 3 any one, it is characterized in that: tubular stuffing box gland (11) protecgulum front end is provided with the groove (20) of ring-type around vent (21), in described groove, be provided with stiffening rib.
5. a kind of spring brake cylinder internal respiration structure according to claim 4, it is characterized in that: one-way valve (10) center, rear end is provided with a cylinder table (30), described trunk piston bar inner chamber bottom center is provided with boss, and described cylinder table rear end apical grafting is on boss.
6. a kind of spring brake cylinder internal respiration structure according to claim 4, it is characterized in that: described brake cylinder body (5) middle part is provided with a valve body (1), described trunk piston bar, through valve body, is provided with an O-ring seals (4) and a y-shaped ring (3) from front to back successively between described valve body and trunk piston bar (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210265120.5A CN102840256B (en) | 2012-07-27 | 2012-07-27 | Spring braking cylinder internal respiration structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210265120.5A CN102840256B (en) | 2012-07-27 | 2012-07-27 | Spring braking cylinder internal respiration structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102840256A CN102840256A (en) | 2012-12-26 |
| CN102840256B true CN102840256B (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210265120.5A Active CN102840256B (en) | 2012-07-27 | 2012-07-27 | Spring braking cylinder internal respiration structure |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747629A (en) * | 2014-07-24 | 2015-07-01 | 宋鲁江 | Rapid resetting device for brake cylinder piston |
| CN104747630A (en) * | 2014-07-24 | 2015-07-01 | 宋鲁江 | Brake cylinder piston with noise reduction function |
| CN107719351A (en) * | 2017-11-13 | 2018-02-23 | 浙江万安科技股份有限公司 | Spring brake cylinder and internal respiration structure |
| CN110173524A (en) * | 2019-06-21 | 2019-08-27 | 莱州虎威机械科技有限公司 | A kind of new brake pump |
| CN113446336B (en) * | 2021-06-30 | 2022-12-27 | 采埃孚商用车系统(青岛)有限公司 | Double-piston spring brake air chamber |
| CN113819282A (en) * | 2021-08-23 | 2021-12-21 | 浙江工正机械有限公司 | Modular breather valve for spring brake chamber and spring brake chamber |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6394462B1 (en) * | 2000-01-26 | 2002-05-28 | Tse Brakes, Inc. | Push rod seal for disc brake actuator |
| CN2918875Y (en) * | 2006-06-12 | 2007-07-04 | 万安集团有限公司 | Breathing apparatus in spring brake cylinder |
| CN102537149A (en) * | 2010-12-13 | 2012-07-04 | 杨乃根 | Internal breathing spring braking air chamber |
| CN202100635U (en) * | 2011-06-10 | 2012-01-04 | 蒋国芬 | Internal-respiration piston type energy storage spring brake chamber |
| CN202091411U (en) * | 2011-07-11 | 2011-12-28 | 宜宾三江机械有限责任公司 | Energy-storage piston type spring braking suction and exhaust structure device in air chamber |
| CN202811936U (en) * | 2012-07-27 | 2013-03-20 | 浙江万安科技股份有限公司 | Internal respiratory structure for spring brake cylinder |
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2012
- 2012-07-27 CN CN201210265120.5A patent/CN102840256B/en active Active
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| CN102840256A (en) | 2012-12-26 |
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Denomination of invention: A breathing structure in spring brake cylinder Effective date of registration: 20200730 Granted publication date: 20140416 Pledgee: Diankou sub branch of Zhejiang Zhuji Rural Commercial Bank Co., Ltd Pledgor: ZHEJIANG VIE SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2020330000528 |