CN203547928U - Novel pressure-controllable type air exhaust brake valve - Google Patents
Novel pressure-controllable type air exhaust brake valve Download PDFInfo
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- CN203547928U CN203547928U CN201320596360.3U CN201320596360U CN203547928U CN 203547928 U CN203547928 U CN 203547928U CN 201320596360 U CN201320596360 U CN 201320596360U CN 203547928 U CN203547928 U CN 203547928U
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Abstract
The utility model relates to a novel pressure-controllable type air exhaust brake valve, which comprises a main air cylinder and a slave air cylinder, wherein the main air cylinder comprises an air cylinder body and a driving rod, the driving rod is connected with a valve block, the interior of the air cylinder body is provided with a piston, the back end of the air cylinder body is provided with an end cap, the piston is connected with a push rod, a spring is arranged between the piston and the end cap, the slave air cylinder comprises a slave cylinder body, the interior of the slave cylinder body is provided with a slave piston, the front end of the slave cylinder body is provided with an end cap of the slave cylinder body, the push rod penetrates through the end cap at the back end of the air cylinder body and the end cap of the slave cylinder body and is connected with the slave piston, the slave piston and a top plate at the back end of the slave cylinder body are provided with a pressure adjusting spring, the top plate at the back end of the slave cylinder body is provided with a ball head, a rotary arm is movably connected between the ball head and the driving rod, and a gap is formed between the main air cylinder and the slave air cylinder. The air exhaust brake valve has the advantages that by additionally arranging the slave air cylinder, the structure is simple, the matching is compact, the seizure under the assembly working condition is avoided, the performance is stable, the durability is realized, and the working service life is greatly prolonged.
Description
Technical field
The utility model and a kind of auto parts machinery field, relate in particular to a kind of exhaust braking valve.
Background technique
For the exhaust braking valve of motor auxiliary braking, have plain edition and controlled pressure type in the market, wherein the structure of controlled pressure type has and on valve body, installs pressure control device additional, also has in valve block rotating shaft and adopts torsion bar to carry out pressure control.The structure of common controlled pressure type exhaust braking valve comprises cylinder, the driveshaft that cylinder comprises cylinder block, is connected with valve block, in cylinder block, be provided with piston, cylinder block rear end is provided with end cap, piston is connected with push rod, between piston and end cap, be provided with spring, between push rod and driveshaft, be connected with pivoted arm.During the work of exhaust brake valve assembly, after the suction port air inlet of cylinder block, piston promotes push rod and moves forward, and push rod has driven the rotation of pivoted arm, finally makes the valve block of driveshaft arrive closed position.Now the outlet pipe back pressure value of exhaust braking valve front end rises along with the rising of engine speed, treat the moment of torsion that outlet pipe back pressure produces on valve block, and the resistance of the cylinder of driveshaft front end is very large, and valve block is always in closed position.Because of the particularity of its exhaust braking valve operating mode, during its work, valve body surface problem can be up to more than 650 degrees Celsius.When removing exhaust brake, under the effect of the return spring of butterfly valve valve block in butterfly valve cylinder, reset, when between valve body and valve block, there is the impurity such as carbon distribution, laying dust, hair fastener while there will be valve body and the relative movement of butterfly valve valve block.Due to the restriction of spring material characteristic, pressure adjusting spring is under this severe operating mode in addition, and its life-span shortens greatly.
Model utility content
The utility model object is to overcome above-mentioned deficiency, increases with dynamic air cylinder, provide a kind of simple in structure, coordinate compact, use type exhaust brake valve assembly reliable, that the life-span is long.
The technological scheme that the technical problem that the utility model solves adopts is:
A kind of novel controlled pressure type exhaust braking valve, comprise master cylinder, master cylinder comprises cylinder block, the driveshaft being connected with valve block, in cylinder block, be provided with piston, cylinder block rear end is provided with end cap, piston is connected with push rod, between piston and end cap, be provided with spring, it is characterized in that also comprising with dynamic air cylinder, with dynamic air cylinder, comprise servo-actuated cylinder body, in servo-actuated cylinder body, be provided with auxiliary follow up piston, servo-actuated cylinder body front end is provided with servo-actuated cylinder end caps, push rod is connected with auxiliary follow up piston with servo-actuated cylinder end caps through the end cap of cylinder block rear end, the top board of auxiliary follow up piston and servo-actuated rear end of the cylinder block is provided with pressure adjusting spring, on the top board of servo-actuated rear end of the cylinder block, be fixed with bulb, between bulb and driveshaft, be connected with pivoted arm, master cylinder and with being provided with gap between dynamic air cylinder.
During the work of exhaust brake valve assembly, after the suction port air inlet of cylinder block, piston promotes push rod and moves forward, and push rod promotes together with servo-actuated cylinder assembly to move by auxiliary follow up piston and pressure adjusting spring, servo-actuated cylinder body is fixedly connected with bulb, therefore the motion of piston has driven the rotation of pivoted arm, finally make the valve block of driveshaft arrive closed position, now the outlet pipe back pressure value of exhaust braking valve front end rises along with the rising of engine speed, when the moment of torsion producing on valve block until outlet pipe back pressure is greater than pressure adjusting spring and acts on the moment of torsion on pivoted arm, this moment of torsion overcomes the moment of torsion that pressure adjusting spring produces, thereby valve block is opened slightly, back pressure value in outlet pipe is declined, and now, valve block is under the effect of pressure adjusting spring, close again, whole working procedure, valve block will constantly be opened and close always, thereby in assurance outlet pipe, back pressure value in steady state.When brake off, the pressurized air in cylinder enters atmosphere through solenoid valve or push buttonvalve, and piston is return under the power effect of spring, because pressure adjusting spring has pretightening force, so in piston return process, cylinder and servo-actuated cylinder body can be considered it is rigidly connected.
Closing and opening by master cylinder and servo-actuated cylinder of the utility model valve block combined and controlled, master cylinder and with being that push rod with in cylinder is rigidly connected between dynamic air cylinder, push rod is connected with servo-actuated cylinder body by auxiliary follow up piston, piston movement in cylinder accurately limits while forming, between servo-actuated cylinder body and auxiliary follow up piston, by pressure adjusting spring, carry out floating connection, and to pressure adjusting spring, produce certain pretightening force by servo-actuated cylinder end caps, so that when return hydraulic cylinder, there will not be cumulative stroke, and make correctly return of valve block, can prevent under assembly working condition, there is catching phenomenon, thereby affect the pressure-controlled function of assembly.
The beneficial effects of the utility model are: the utility model has increased with dynamic air cylinder, simple in structure, coordinate compact, can prevent from occurring catching phenomenon under assembly working condition, stable performance, durable in use, extend greatly its operating life.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, model utility is further illustrated.
Fig. 1 is the utility model example structure schematic diagram.
In figure: 1, driveshaft 2, pivoted arm 3, bulb 4, connecting bolt 5, servo-actuated cylinder body 6, pressure adjusting spring 7, auxiliary follow up piston 8, servo-actuated cylinder end caps 9, push rod 10, piston 11, cylinder block 12, gap 13, master cylinder 14, with dynamic air cylinder 15, end cap 16, spring 17, suction port.
Embodiment
In Fig. 1, a kind of novel controlled pressure type exhaust braking valve, comprise master cylinder 13 and with dynamic air cylinder 14, master cylinder 13 comprises cylinder block 11, the driveshaft 1 being connected with valve block, in cylinder block 11, be provided with piston 10, cylinder block 11 rear ends are provided with end cap 15, piston 10 is connected with push rod 9, between piston 10 and end cap 15, be provided with spring 16, with dynamic air cylinder 14, comprise servo-actuated cylinder body 5, in servo-actuated cylinder body 5, be provided with auxiliary follow up piston 8, servo-actuated cylinder body 5 front ends are provided with servo-actuated cylinder end caps 8, push rod 9 is through being connected with nut between the end cap 15 of cylinder block 11 rear ends and servo-actuated cylinder end caps 8 and auxiliary follow up piston 7, the top board of auxiliary follow up piston 7 and servo-actuated cylinder body 5 rear ends is provided with pressure adjusting spring 6, on the top board of servo-actuated cylinder body 5 rear ends, with connecting bolt 4, be fixed with bulb 3, between bulb 3 and driveshaft 1, be connected with pivoted arm 2, master cylinder 13 and with being provided with gap 12 between dynamic air cylinder 14.
During the work of exhaust brake valve assembly, after suction port 17 air inlets of cylinder block 11, piston 10 promotes push rod 9 and moves forward, and push rod 9 moves together with promoting servo-actuated cylinder assembly by auxiliary follow up piston 7 with pressure adjusting spring 6, servo-actuated cylinder body 5 is fixedly connected with bulb 3, therefore the motion of piston 10 has driven the rotation of pivoted arm 2, finally make the valve block that driveshaft 1 connects arrive closed position, now the outlet pipe back pressure value of exhaust braking valve front end rises along with the rising of engine speed, when the moment of torsion producing on valve block until outlet pipe back pressure is greater than pressure adjusting spring 6 and acts on the moment of torsion on pivoted arm 2, this moment of torsion overcomes the moment of torsion that pressure adjusting spring 6 produces, thereby valve block is opened slightly, back pressure value in outlet pipe is declined, and now, valve block is under the effect of pressure adjusting spring 6, close again, whole working procedure, valve block will constantly be opened and close always, thereby in assurance outlet pipe, back pressure value in steady state.When brake off, pressurized air in cylinder enters atmosphere through solenoid valve or push buttonvalve, and piston 10 is return under the power effect of spring 16, because pressure adjusting spring 6 has pretightening force, so in piston 10 return processes, master cylinder 13 and can be considered it is rigidly connected with dynamic air cylinder 14.
Above-described embodiment is to explanation of the present utility model, is not to restriction of the present utility model, any on the utility model basis the structure after simple transformation all belong to protection domain of the present utility model.
Claims (1)
1. a novel controlled pressure type exhaust braking valve, comprise master cylinder, master cylinder comprises cylinder block, the driveshaft being connected with valve block, in cylinder block, be provided with piston, cylinder block rear end is provided with end cap, piston is connected with push rod, between piston and end cap, be provided with spring, it is characterized in that also comprising with dynamic air cylinder, with dynamic air cylinder, comprise servo-actuated cylinder body, in servo-actuated cylinder body, be provided with auxiliary follow up piston, servo-actuated cylinder body front end is provided with servo-actuated cylinder end caps, push rod is connected with auxiliary follow up piston with servo-actuated cylinder end caps through the end cap of cylinder block rear end, the top board of auxiliary follow up piston and servo-actuated rear end of the cylinder block is provided with pressure adjusting spring, on the top board of servo-actuated rear end of the cylinder block, be fixed with bulb, between bulb and driveshaft, be connected with pivoted arm, master cylinder and with being provided with gap between dynamic air cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320596360.3U CN203547928U (en) | 2013-09-26 | 2013-09-26 | Novel pressure-controllable type air exhaust brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320596360.3U CN203547928U (en) | 2013-09-26 | 2013-09-26 | Novel pressure-controllable type air exhaust brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203547928U true CN203547928U (en) | 2014-04-16 |
Family
ID=50466056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320596360.3U Expired - Lifetime CN203547928U (en) | 2013-09-26 | 2013-09-26 | Novel pressure-controllable type air exhaust brake valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203547928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976251A (en) * | 2015-07-29 | 2015-10-14 | 安徽江淮汽车股份有限公司 | Exhaust-assisted brake |
-
2013
- 2013-09-26 CN CN201320596360.3U patent/CN203547928U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976251A (en) * | 2015-07-29 | 2015-10-14 | 安徽江淮汽车股份有限公司 | Exhaust-assisted brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |