CN201849462U - Full-automatic boosted braking device - Google Patents
Full-automatic boosted braking device Download PDFInfo
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- CN201849462U CN201849462U CN2010206155747U CN201020615574U CN201849462U CN 201849462 U CN201849462 U CN 201849462U CN 2010206155747 U CN2010206155747 U CN 2010206155747U CN 201020615574 U CN201020615574 U CN 201020615574U CN 201849462 U CN201849462 U CN 201849462U
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Abstract
The utility model relates to a full-automatic boosted braking device which comprises a relay valve, an automatic booster, a valve, an air inlet cavity and an air outlet cavity, wherein the automatic booster and the upper end of a valve body of the relay valve adopt an integrated casting structure, the upper part of the valve body is fixedly connected with the lower part of the valve body by a screw, a big piston and a small piston are arranged in the valve body of the relay valve, and the valve body also comprises a medium-sized piston; the big piston, the medium-sized piston and the small piston adopt an up-and-down close sheathing structure; the big piston is communicated with the central position of the medium-sized piston by an air inlet hole, and cavities are respectively arranged between the up-and-down close sheathing surfaces of the three pistons; the small piston is not provide with the air inlet hole, the lower middle part of the small piston is a cylinder, and the bottom part of the cylinder of the small piston is matched with the valve. As the three pistons are adopted to transfer air pressure and the weight of the small piston is pretty light, an operator can push the small piston with small mass to descend to exert high pressure on the valve only by exerting a small force on the big piston; moreover, the lower surface of the small piston is also provided with grooves, so that air in an air inlet chamber can easily pass through a channel between the valve and the small piston to enter an air outlet chamber; therefore, the braking is more convenient and the sensitivity is higher.
Description
Technical field
The utility model belongs to the self-propelled vehicle brake field, especially relates to a kind of servobrake device.
Background technology
Relay valve belongs to the part of Automobile air braking system.In the vehicle of many bridges trailer of use emergency brake valve, superimposed trailer, the normal employing installed two or more emergency relay valve at present, and this structure often causes the vehicle tyre locking, and wear on tyres is irregular.For solving this technical matters, China Patent No. is ZL2006200875536, the utility model name is called many bridges back pressure type emergency synchronous brake valve and discloses a kind of brake activation valve, it comprises upper valve body, following valve body, piston, emergency piston, valve, valve seat, lining, piston is installed in down valve body top, be with outward every dish, middle lower portion places in the top of emergency piston, be provided with air intake structure on the valve body down, mounted valve and valve seat in the emergency piston lower port, emergency piston is installed in down in the valve body by lining, and this brake activation valve mainly is by coming the ratio of the area up and down of adjusting piston every dish, braking soon thereby reach, remove fast purpose.But the shortcoming of this structure is: use when dish comes the area up and down of adjusting piston, appearance is gently stopped normally easily, so under power during hard braking; If instead hard braking is normal, so gently braking, then braking force is excessive.
For this reason, China Patent No. ZL2008201806759, the utility model name is called the urgent relay valve synchronously of many bridges automatic ABS power-assisted and discloses a kind of relay valve, it is characterized in that being provided with two pistons in the valve body of emergency relay valve, two pistons are up-down structures, the big piston bottom is a valve piston, and the cylinder outer setting at middle part has the piston spring under valve piston, is provided with total valve in the cylindrical middle and lower part of valve piston; The cylinder bottom of valve piston bottom is connected with total valve is closed.Adopt after this structure, the Shi Buhui that gently touches on the brake causes brake locking, has reduced the wear on tyres degree that causes because of brake, has increased braking strength during hard braking.
Though but in the valve body of the urgent relay valve synchronously of this many bridges automatic ABS power-assisted two piston actions are arranged, convenient more many than using every the ratio of the area up and down that coils adjusting piston, but in practical operation, because valve piston quality wherein is bigger, still not really light when the operator touches on the brake, sensitivity neither be very high.
Summary of the invention
It is lighter that the technical problems to be solved in the utility model provides a kind of brake, the servobrake device that sensitivity is higher.
For this reason, the technical solution of the utility model is such
,The full-automatic servo-brake device, comprise relay valve, automatic power booster, valve, inlet chamber, outlet chamber, the valve body upper end of automatic power booster and relay valve is the integral type cast structure, captive joint with screw with valve body lower portion in valve body top, be provided with big piston, valve piston in the valve body of relay valve, it is characterized in that: also comprise a middle piston, described big piston, middle piston, valve piston are tight shrink-fit structure up and down, big piston and middle piston centre have induction opening to be communicated with, and three pistons have cavity between the fit face up and down; Valve piston does not have induction opening, and the following middle part of described valve piston is a cylinder, and the cylinder bottom of described valve piston cooperates with valve.
Further, big piston, middle piston, middle part, valve piston outside circumference respectively are provided with cushion rubber.
Further, the induction opening diameter of big piston is greater than the induction opening diameter of middle piston.
The valve piston lower surface can have some grooves.Groove on the valve piston can have four, is crossing distribution.
The cylinder of valve piston can be hollow.The cylinder of valve piston is outside equipped with retracing spring.
Adopt after the technique scheme, automobile is carrying out the pneumatic brake glancing impact, when stepping on brake pedal, speed-slackening signal gas enters the speed-slackening signal air chamber by braking signal gas port, act on big piston, descending by the induction opening on the big piston, enter the middle air cavity of big piston and middle piston, because the air cavity during big piston and the tight fit of middle piston, gas will go downwards to by the induction opening of middle piston between piston and the valve piston.The induction opening diameter of big piston makes descending air pressure increase greater than the induction opening diameter of middle piston.
Owing to do not have induction opening on the valve piston, in entering between piston and the valve piston gas of air cavity will to promote valve piston descending.With pressure valve under the cylinder of the valve piston of valve coupling, the valve appropriateness that is under pressure is opened, and at this moment the passage opened after pressing down by valve of the gas in the inlet chamber enters in the outlet chamber, is the wheel cylinder air feed by air extractor duct then, reaches the brake purpose.
Owing to adopted three pistons to transmit air pressure, three pistons are up and down closely shrink-fit structure, the induction opening diameter of big piston is greater than middle piston intake bore dia, the valve piston lighter weight, make the operator as long as apply less power to big piston, just can promote that the less valve piston of quality is descending to apply big pressure to valve, and the valve piston lower surface groove that distributing again, make that the gas in the inlet chamber is easier of the passage between valve and the valve piston, enter in the outlet chamber, therefore brake is more light, and sensitivity is also higher.When groove was distributed as criss cross, effect was better.When the cylinder on the valve piston is hollow, make the valve piston quality further alleviate on the one hand, more light when promoting valve piston, can save material again.
Behind the brake off state, after promptly brake pedal lifted, because the air pressure that acts on the big piston disappears, valve was no longer stressed, resets under the effect of regulating spring, promotes horizontal reset on the valve piston.Certainly, the cylinder outside of the hollow of valve piston lower end can also be provided with retracing spring, helps it to reset.
Description of drawings
Fig. 1 is a generalized section of the present utility model.
The specific embodiment
Below in conjunction with Fig. 1 the utility model is described.
Accompanying drawing 1 is a generalized section of the present utility model, comprises speed-slackening signal air chamber 1, big piston 2, middle piston 3, valve piston 4, the induction opening 5 of big piston, air cavity 6 between big piston and the middle piston, the air cavity 7 between middle piston and the valve piston, valve 8, inlet chamber 9, outlet chamber 10, air extractor duct 11, cushion rubber 12, the cylinder 13 of valve piston, the induction opening 14 of middle piston.Automobile is carrying out the pneumatic brake glancing impact, when stepping on brake pedal, speed-slackening signal gas enters speed-slackening signal air chamber 1 by braking signal gas port, act on big piston 2, descending by the induction opening on the big piston 25, enter the air cavity 6 of big piston 2 and middle piston 3 centres, because big piston and the tight fit of middle piston, under gas pressure, gas is the air cavity 7 between piston 3 and the valve piston 4 during the induction opening 14 by middle piston 3 goes downwards to again, owing to do not have induction opening on the valve piston 4, in therefore entering between piston and the valve piston gas of air cavity will to promote valve piston 4 descending.The cylinder 13 and the valve 8 of valve piston 4 match, the cylinder 13 of valve piston 4 directly descends pressure valve 8 behind the pressurized, valve 8 appropriateness that is under pressure is opened, at this moment the passage opened after pressing down by valve 8 of the gas in the inlet chamber 9 enters in the outlet chamber 10, by air extractor duct 11 is the wheel cylinder air feed, reaches the brake purpose.
Behind the brake off state, after promptly brake pedal lifted, because the air pressure that acts on the big piston 2 disappears, valve 8 was no longer stressed, resets under the effect of regulating spring, promotes horizontal reset on the valve piston 4.Certainly, cylinder 13 outsides of the hollow of valve piston lower end can also be provided with retracing spring, help it to reset.
Claims (7)
1. full-automatic servo-brake device, comprise relay valve, automatic power booster, valve, inlet chamber, outlet chamber, the valve body upper end of automatic power booster and relay valve is the integral type cast structure, captive joint with screw with valve body lower portion in valve body top, be provided with big piston, valve piston in the valve body of relay valve, it is characterized in that: also comprise a middle piston, described big piston, middle piston, valve piston are tight shrink-fit structure up and down, big piston and middle piston centre have induction opening to be communicated with, and three pistons have cavity between the fit face up and down; Valve piston does not have induction opening, and the following middle part of described valve piston is a cylinder, and the cylinder bottom of described valve piston cooperates with valve.
2. full-automatic servo-brake device as claimed in claim 1 is characterized in that: big piston, middle piston, middle part, valve piston outside circumference respectively are provided with cushion rubber.
3. full-automatic servo-brake device as claimed in claim 2 is characterized in that: the induction opening diameter of big piston is greater than the induction opening diameter of middle piston.
4. full-automatic servo-brake device as claimed in claim 3 is characterized in that: the valve piston lower surface has some grooves.
5. full-automatic servo-brake device as claimed in claim 4 is characterized in that: the groove on the valve piston has four, is crossing distribution.
6. full-automatic servo-brake device as claimed in claim 3 is characterized in that: the cylinder of valve piston is a hollow.
7. full-automatic servo-brake device as claimed in claim 6 is characterized in that: the cylinder of valve piston is outside equipped with retracing spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206155747U CN201849462U (en) | 2010-11-19 | 2010-11-19 | Full-automatic boosted braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206155747U CN201849462U (en) | 2010-11-19 | 2010-11-19 | Full-automatic boosted braking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201849462U true CN201849462U (en) | 2011-06-01 |
Family
ID=44091868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206155747U Expired - Fee Related CN201849462U (en) | 2010-11-19 | 2010-11-19 | Full-automatic boosted braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201849462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103287550A (en) * | 2013-05-29 | 2013-09-11 | 明光市留香泵业有限公司 | Surface operating platform special for sand sucker pump |
-
2010
- 2010-11-19 CN CN2010206155747U patent/CN201849462U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103287550A (en) * | 2013-05-29 | 2013-09-11 | 明光市留香泵业有限公司 | Surface operating platform special for sand sucker pump |
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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: 20110601 Termination date: 20111119 |