CN204548082U - Brake activation valve double-piston spool - Google Patents
Brake activation valve double-piston spool Download PDFInfo
- Publication number
- CN204548082U CN204548082U CN201520050980.6U CN201520050980U CN204548082U CN 204548082 U CN204548082 U CN 204548082U CN 201520050980 U CN201520050980 U CN 201520050980U CN 204548082 U CN204548082 U CN 204548082U
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- CN
- China
- Prior art keywords
- piston
- brake
- bush
- activation valve
- brake activation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000004913 activation Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Braking Arrangements (AREA)
Abstract
The utility model discloses a kind of brake activation valve double-piston spool, comprise piston bush, first piston is provided with inside described piston bush, the second piston is provided with inside first piston, periphery, first piston one end is provided with flange and is connected piston bush, the other end is connected the annular protrusion be located at inside piston bush, is provided with the first retracing spring between annular protrusion and the flange of first piston; Second described piston one end is that column structure is connected the endoporus of first piston bottom center, endoporus center is provided with the deflation hole of undergauge, the second piston other end is provided with the bulge loop in the first piston inner side step hole that is connected, and is provided with the second retracing spring between bulge loop and first piston bottom surface.The utility model is divided into twice by the pressurized air that double-piston spool controls to enter compressed air brake cylinder and puts in place, first time controls a large amount of brake gas emergency brake brake wheel by first piston, second time controls a small amount of brake gas by the second piston, wheel braking is stopped, the basis of snap catch avoids the technical failures such as the excessive locking caused of braking force.
Description
Technical field
The utility model relates to a kind of spool, particularly relates to a kind of brake activation valve double-piston spool.
Background technology
Brake activation valve belongs to a part for automobile air brake brake system, in the brake system of autotruck, when chaufeur steps on stretcher, torque arm one end is made to press down balance spring by stretching pull bar, equilibrium arm is moved down, first drain tap is closed, open air intake valve, now the pressurized air of air receiver is filled with compressed air brake cylinder through air inlet valve, promotes air chamber diaphragm and makes brake shoe expander rotate thus realize wheel braking.It is one-time-reach-place that existing brake activation valve spool is the pressurized air that single piston structure namely enters compressed air brake cylinder, often under emergency brake situation, causes the technical failures such as the excessive locking caused of wheel braking force.Under the prerequisite guaranteeing brake control power, how to avoid the locking fault caused because braking force is excessive to be the object that those skilled in the art study always.
The Chinese utility model patent patent No. 200920298599.6 discloses one and puts brake activation valve soon.This valve is made up of rapid release valve body and braking valve body, rapid release valve body has rapid release valve admission port, rapid release valve gas delivery port, rapid release valve air flue, valve block and rapid release valve gas delivery port, braking valve body has brake activation valve first piston, brake activation valve second piston, brake activation valve second piston reset spring, brake activation valve air flue, brake activation valve exhausr port, brake activation valve first admission port, brake activation valve second admission port and brake activation valve gas delivery port, brake activation valve first piston has brake activation valve first piston cavity, brake activation valve second piston has brake activation valve second piston cavity, brake activation valve first piston has brake activation valve first piston extension, brake activation valve air flue has brake activation valve air flue lug boss, the outer wall of brake activation valve first piston extension and the inwall of brake activation valve air flue lug boss match to merge and form sealing pair.But although this kind puts brake activation valve soon can improve brake sensitivity structure relative complex, also do not prevent technical clarification or the solution of the aspects such as locking.
Summary of the invention
The utility model provides that a kind of structure is simple, the brake reaction time is short, the brake activation valve double-piston spool of emergency brake anti-lock.
A kind of brake activation valve double-piston spool, comprise piston bush, first piston is provided with inside described piston bush, the second piston is provided with inside first piston, periphery, first piston one end is provided with flange and is connected piston bush, the other end is connected the annular protrusion be located at inside piston bush, is provided with the first retracing spring between annular protrusion and the flange of first piston; Second described piston one end is that column structure is connected the endoporus of first piston bottom center, endoporus center is provided with the deflation hole of undergauge, the second piston other end is provided with the bulge loop in the first piston inner side step hole that is connected, and is provided with the second retracing spring between bulge loop and first piston bottom surface.The first seal ring is provided with between the flange of described first piston and piston bush.This kind of brake activation valve with double-piston spool when after drag, the pressurized air that brake activation valve controls to enter compressed air brake cylinder is divided into twice and puts in place, first time controls a large amount of brake gas emergency brake brake wheel by first piston, but this process does not stop wheel braking, but control a small amount of brake gas by the second piston, wheel braking is stopped, the basis of snap catch avoids the technical failures such as the excessive locking caused of braking force.
The upper and lower both sides of described piston bush are equipped with the seal groove of annular protrusion, and seal groove is embedded with seal ring, technical failure that the hermetically-sealed construction of upper and lower both sides prevents that spool from leaking air etc.
As the flange outer face of the preferred first piston of structure, spacing by the first snap ring be located at inside piston bush.First piston, under the first action of reset spring, is between the annular protrusion inside the first snap ring and piston bush by brake-power control crank motion.
The bulge loop outer face of the second described piston, spacing by the second snap ring be located at inside first piston.Second piston, under the second action of reset spring, is between the second snap ring and first piston bottom surface by brake-power control crank motion.
The utility model is divided into twice by the pressurized air that double-piston spool controls to enter compressed air brake cylinder and puts in place, first time controls a large amount of brake gas emergency brake brake wheel by first piston, but this process does not stop wheel braking, but control a small amount of brake gas by the second piston, wheel braking is stopped, the basis of snap catch avoids the technical failures such as the excessive locking caused of braking force.
Accompanying drawing explanation
Fig. 1 is that the utility model brake activation valve double-piston spool master looks sectional structure schematic diagram.
Detailed description of the invention
A kind of brake activation valve double-piston spool as shown in Figure 1, comprise piston bush 1, first piston 3 is provided with inside piston bush 1, the second piston 9 is provided with inside first piston 3, periphery, first piston 3 one end is provided with flange and is connected piston bush, the other end is connected the annular protrusion be located at inside piston bush, is provided with the first retracing spring 8 between annular protrusion and the flange of first piston.Second piston 9 one end is that column structure is connected the endoporus of first piston bottom center, endoporus center is provided with the deflation hole of undergauge to improve the speed of discharging brake gas, second piston 9 other end is provided with the bulge loop in the first piston inner side step hole that is connected, and is provided with the second retracing spring 4 between bulge loop and first piston bottom surface.The first seal ring 2 is provided with between the flange of first piston and piston bush.
Overlap as structure piston the seal groove that upper and lower both sides are equipped with annular protrusion, seal groove is embedded with seal ring 5, improves the sealing property of whole brake activation valve, Leakage prevention.
In order to realize the crank motion in first piston braking procedure, the flange outer face of first piston, by the first snap ring spacing 6 be located at inside piston bush.First piston 3, under the first retracing spring 8 acts on, is between the annular protrusion inside the first snap ring 6 and piston bush 1 by brake-power control crank motion.
In order to realize the crank motion in the second piston deceleration process, the bulge loop outer face of the second piston, by the second snap ring spacing 7 be located at inside first piston.Second piston 9, under the second retracing spring 4 acts on, is between the second snap ring 7 and first piston bottom surface by brake-power control crank motion.
Claims (5)
1. a brake activation valve double-piston spool, comprise piston bush, it is characterized in that: inside described piston bush, be provided with first piston, the second piston is provided with inside first piston, periphery, first piston one end is provided with flange and is connected piston bush, the other end is connected the annular protrusion be located at inside piston bush, is provided with the first retracing spring between annular protrusion and the flange of first piston; Second described piston one end is that column structure is connected the endoporus of first piston bottom center, endoporus center is provided with the deflation hole of undergauge, the second piston other end is provided with the bulge loop in the first piston inner side step hole that is connected, and is provided with the second retracing spring between bulge loop and first piston bottom surface.
2. brake activation valve double-piston spool as claimed in claim 1, is characterized in that: the upper and lower both sides of described piston bush are equipped with the seal groove of annular protrusion, and seal groove is embedded with seal ring.
3. brake activation valve double-piston spool as claimed in claim 1, is characterized in that: the flange outer face of described first piston, spacing by the first snap ring be located at inside piston bush.
4. brake activation valve double-piston spool as claimed in claim 1, is characterized in that: the bulge loop outer face of the second described piston, spacing by the second snap ring be located at inside first piston.
5. brake activation valve double-piston spool as claimed in claim 1, is characterized in that: be provided with the first seal ring between the flange of described first piston and piston bush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520050980.6U CN204548082U (en) | 2015-01-17 | 2015-01-17 | Brake activation valve double-piston spool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520050980.6U CN204548082U (en) | 2015-01-17 | 2015-01-17 | Brake activation valve double-piston spool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204548082U true CN204548082U (en) | 2015-08-12 |
Family
ID=53823230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520050980.6U Expired - Fee Related CN204548082U (en) | 2015-01-17 | 2015-01-17 | Brake activation valve double-piston spool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204548082U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107399311A (en) * | 2017-05-24 | 2017-11-28 | 浙江万安科技股份有限公司 | A kind of limiting mechanism of pressure and electric-controlled type air brake valve assembly |
-
2015
- 2015-01-17 CN CN201520050980.6U patent/CN204548082U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107399311A (en) * | 2017-05-24 | 2017-11-28 | 浙江万安科技股份有限公司 | A kind of limiting mechanism of pressure and electric-controlled type air brake valve assembly |
| CN107399311B (en) * | 2017-05-24 | 2023-08-08 | 浙江万安科技股份有限公司 | Pressure limiting mechanism and electric control type air brake valve assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 |