CN201052777Y - Automobile pressure-variable relay valve - Google Patents
Automobile pressure-variable relay valve Download PDFInfo
- Publication number
- CN201052777Y CN201052777Y CNU2007201161190U CN200720116119U CN201052777Y CN 201052777 Y CN201052777 Y CN 201052777Y CN U2007201161190 U CNU2007201161190 U CN U2007201161190U CN 200720116119 U CN200720116119 U CN 200720116119U CN 201052777 Y CN201052777 Y CN 201052777Y
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- Prior art keywords
- piston
- cavity
- air
- upper shell
- relay valve
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- Expired - Fee Related
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- 230000006698 induction Effects 0.000 claims description 27
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The utility model discloses a car pressure-changing type relay valve which comprises an upper shell, a lower shell, pistons, an air intake valve and an air vent valve, wherein, the upper shell is provided with air inlets, two pistons are arranged inside the cavity of the lower shell, the lower ends of the two pistons are respectively provided with the air intake valve and the air vent valve, the wall of the shell is provided with air inlets and an air outlet; one piston can also be arranged in the cavity of the upper shell, the cross-section area of the piston is more than or equal to the sum of the cross-section areas of the two pistons in the cavity of the lower shell. The pistons with different cross-section areas are respectively arranged in the cavity of the shell of the utility model , are used adjust the pressure in the brake chamber by air inlet of different air inlets and supply the brake chamber with rational and different pressure according to the different static weight conditions of the main driving axle and the trailer axle, thereby achieving the effect of the synchronous brake of all axles, being capable of quickly returning gas and overcoming the disadvantages that the axles of the prior relay valve are not synchronous in brake. The utility model has the advantages of quick speed reduction, no abrasion on the tyre, preventing the side sliding and easy driving operation.
Description
Technical field
The utility model belongs to the compressed air brake valve technology field, is specifically related to the compressed air brake brake servo valve that trailer or trailer use.
Background technology
When automobile superimposed trailer and towed vehicle empty wagons, all exist main car and back trailer can not realize the shortcoming of synchronous brake.At present, the brake relay valve that uses on superimposed trailer and the towed vehicle does not have depressurization, and braking effectively in the time of can only guaranteeing loaded vehicle.The empty wagons glancing impact is because trailer axle weight is lighter, during general three bridge trailer empty wagons between the total weight 6.5-7T, every tire has only 550-580kg to ground-surface pressure, and main drive axle focuses between the 4.4-5T, every tire is 1100-1250kg with ground-surface pressure, can't solve because of trailing weight glancing impact passenger tyre and easily drag extremely, tire is easy to wear, main drive axle weight does not also play desirable braking effect greatly, cause deceleration bad, drive not easy to operately, return-air is slow during the brake off of brake back, the shortcoming of waste fuel oil.
Summary of the invention
The purpose of this utility model is to provide a kind of automobile pressure swing type relay valve.Under the bare weight different condition, supply with the rational different pressures in drag chamber according to main drive axle, trailer axle, thereby play the effect of each bridge synchronous braking, return-air has overcome each bridge of relay valve in the past and has braked nonsynchronous shortcoming faster.
The technical solution of the utility model is: a kind of automobile pressure swing type relay valve, comprise upper shell, lower house, piston and intake and exhaust valve, upper shell is connected with lower house, upper shell is provided with induction opening, upper piston and lower piston are set in the lower house cavity, the push rod of lower piston is arranged in the groove of upper piston, and the two-piston lower end is respectively equipped with the intake and exhaust valve; The lower casing body wall has induction opening and air gate.
In the described upper shell cavity piston is set, housing wall is provided with two induction openings; The cross-sectional area of described upper shell cavity inner carrier is more than or equal to the cross-sectional area sum of two-piston in the lower house cavity.
Be respectively equipped with pull back spring on the two-piston about described.Be provided with a bearing cap shim in the groove of described upper piston.
Only be provided with a piston in the described lower house cavity, the cross-sectional area of upper shell cavity inner carrier is less than 1/2nd of the cross-sectional area of lower house cavity inner carrier.
The utility model is provided with the long-pending piston of varying cross-section respectively in shell cavity, from different induction opening air inlets, in order to adjust the drag room pressure, make brake equalization, and it is fast to slow down, and tire does not does not wear and tear, and prevents to break away, and drives easy to operate.
Description of drawings
Fig. 1 is the cutaway view of the utility model automobile pressure swing type relay valve front view;
Fig. 2 is the cutaway view of the utility model automobile pressure swing type relay valve one embodiment front view;
Fig. 3 is the cutaway view of another embodiment front view of the utility model automobile pressure swing type relay valve.
The specific embodiment
As shown in Figure 1, automobile pressure swing type relay valve, it comprises upper shell 1, lower house 2, piston and intake and exhaust valve, is connected between the upper and lower casing, and upper shell is provided with induction opening 7, and induction opening 7 is connected with the master cylinder freeing pipe.Upper piston 4 and lower piston 5 are set in the cavity of lower house 2, and the push rod of lower piston is arranged in the groove 6 of upper piston, is provided with a bearing cap shim in the groove of described upper piston.Upper piston is provided with pull back spring 8, and lower piston is provided with pull back spring 9, and the upper piston lower end is provided with intake and exhaust valve 10, and lower piston is provided with intake and exhaust valve 11, and the valve below is provided with dust boot 16; Housing wall has induction opening 12 and induction opening 13 is connected with air receiver respectively, and described air inlet position can be provided with breather check valve.Housing wall has air gate 14 and air gate 15 is connected with the drag chamber respectively.Have induction opening 18 on the housing wall and be connected with triple valve, described triple valve one end communicates with atmosphere, and the other end communicates with the master cylinder freeing pipe, and triple valve can be selected for use manually or motorized valve.
When closing triple valve not to induction opening 18 air feed, make the logical atmosphere in the back side of lower piston 5, lower piston 5 becomes passive piston and plays depressurization.When opening the triple valve switch to air extractor vent 18 air feed, promote lower piston 5 motions, make piston 5 become active piston, do not play depressurization.
As shown in Figure 2, automobile pressure swing type relay valve, the rear wheel brake that is mainly used in trailer uses.It comprises upper shell 1, lower house 2, three pistons and intake and exhaust valves, be connected between the upper and lower casing, a piston 3 is set in the upper shell cavity, housing wall is provided with two induction openings 7 and 17, induction opening 7 is connected with the master cylinder freeing pipe, and induction opening 17 is connected with triple valve.Upper piston 4 and lower piston 5 are set in the cavity of lower house 2, and the push rod of lower piston is arranged in the groove 6 of upper piston, is provided with a bearing cap shim in the groove of described upper piston.Be respectively equipped with pull back spring 8 and 9 on the two-piston, the two-piston lower end is respectively equipped with intake and exhaust valve 10 and 11, and the valve below is provided with dust boot 16; Housing wall has induction opening 12 and induction opening 13 is connected with air receiver respectively, and described air inlet position can be provided with breather check valve.Housing wall has air gate 14 and air gate 15 is connected with the drag chamber respectively.Having deflation hole 18 on the housing wall communicates with atmosphere.
Working process: when heavily loaded drag, when closing triple valve, this device cavity is communicated with atmosphere, intracavity gas is discharged, upper casing body cavity inner carrier is moved down, promote two-piston co-operation in the lower house, open air intake valve 10 and 11, air enters in the cavity by induction opening 12,13, enters into the drag chamber by air gate 14,15 and brakes.During empty wagons, open induction opening 17, this device of air admission makes upper casing body cavity inner carrier pressure at both sides equalization, and piston quits work, the gas compression upper piston that enters into the piston lower end moves down, upper piston promotes lower piston work, and aerification in the air gate 14,15 makes two piston antagonistic forces implement decompression, the gaseous tension that enters main drive wheel is about two times of trailer pressure, and it is balanced that each bridge is prevented.
As shown in Figure 3, the another kind of embodiment of automobile pressure swing type relay valve, its preceding wheel brake that is mainly used in trailer uses.It comprises upper shell 1, lower house 2, piston 3,4 and intake and exhaust valve 10, be connected between the upper and lower casing, piston 3 is set in the upper shell cavity, housing wall is provided with two induction openings 7 and 17, induction opening 7 is connected with the master cylinder freeing pipe, and induction opening 17 is connected with triple valve.One piston 4 is set in the cavity of lower house, and piston is provided with pull back spring 8, and the piston lower end is provided with intake and exhaust valve 10, and housing wall has induction opening 12 and is connected with air receiver, and described air inlet position can be provided with breather check valve.Housing wall has air gate 14 and is connected with the drag chamber, and 19 is deflation hole.The cross-sectional area of described upper shell cavity inner carrier is less than 1/2nd of the cross-sectional area of lower house cavity inner carrier.
When empty wagons, to open induction opening 7 air and enter in the cavity from induction opening, air compression upper casing body cavity inner carrier, piston promote lower casing body cavity inner carrier and move down, and open valve and carry out brake work.Because the upper shell piston area is approximately 1/2nd of lower house piston area, so whole device plays depressurization.When heavy duty, open induction opening 17, the air admission cavity directly enters in the piston cavity through upper shell inner carrier through hole, promotes the lower house pistons work, and relay valve turnover pressure is equated.
Claims (5)
1. automobile pressure swing type relay valve, comprise upper shell (1), lower house (2), piston and drain tap (10,11), upper shell is connected with lower house, it is characterized in that: upper shell is provided with induction opening (7), two-piston (4,5) up and down is set in the lower house cavity, the push rod of lower piston is arranged in the groove (6) of upper piston, and the two-piston lower end is respectively equipped with the intake and exhaust valve; The lower casing body wall has induction opening (12,13,18) and air gate (14,15).
2. automobile pressure swing type relay valve according to claim 1, it is characterized in that: a piston (3) is set in the upper shell cavity, two induction openings (7,17) are set on the housing wall, and the cross-sectional area of described piston (3) is more than or equal to the cross-sectional area sum of two-piston in the lower house cavity (4,5).
3. automobile pressure swing type relay valve according to claim 1 and 2 is characterized in that: two-piston is respectively equipped with pull back spring (8,9) in the described lower house cavity.
4. automobile pressure swing type relay valve according to claim 1 and 2 is characterized in that: be provided with a bearing cap shim in the groove of upper piston in the described lower house cavity.
5. automobile pressure swing type relay valve according to claim 1 is characterized in that: be provided with a piston (4) in the described lower house cavity, the cross-sectional area of upper shell cavity inner carrier (3) is less than 1/2nd of the cross-sectional area of lower house cavity inner carrier (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201161190U CN201052777Y (en) | 2007-04-26 | 2007-04-26 | Automobile pressure-variable relay valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201161190U CN201052777Y (en) | 2007-04-26 | 2007-04-26 | Automobile pressure-variable relay valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201052777Y true CN201052777Y (en) | 2008-04-30 |
Family
ID=39392445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201161190U Expired - Fee Related CN201052777Y (en) | 2007-04-26 | 2007-04-26 | Automobile pressure-variable relay valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201052777Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962013A (en) * | 2010-09-16 | 2011-02-02 | 贾可义 | Brake device for heavy duty truck |
-
2007
- 2007-04-26 CN CNU2007201161190U patent/CN201052777Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962013A (en) * | 2010-09-16 | 2011-02-02 | 贾可义 | Brake device for heavy duty truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20100426 |