CN102852648B - Pressure limiting and air leaking auxiliary brake valve device with circular-arc-shaped pressure leaking port - Google Patents
Pressure limiting and air leaking auxiliary brake valve device with circular-arc-shaped pressure leaking port Download PDFInfo
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- CN102852648B CN102852648B CN201210344488.0A CN201210344488A CN102852648B CN 102852648 B CN102852648 B CN 102852648B CN 201210344488 A CN201210344488 A CN 201210344488A CN 102852648 B CN102852648 B CN 102852648B
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Abstract
The invention discloses a pressure limiting and air leaking auxiliary brake valve device with a circular-arc-shaped pressure leaking port. The pressure limiting and air leaking auxiliary brake valve device with the circular-arc-shaped pressure leaking port comprises a valve body, a butterfly sheet, a support device and a pressure regulating device; a support groove of the butterfly sheet is a circular ladder-shaped groove, a first ladder, a second ladder and a third ladder are respectively arranged from the outer edge of the butterfly sheet, and the inner diameters are sequentially decreased; the pressure leaking port device comprises a first pressure leaking port and a second pressure leaking port, wherein the first pressure leaking port is positioned on the groove wall of a third ladder of the support groove at one side of an air intake cavity of the butterfly sheet; the second pressure leaking port is positioned on the groove wall of a first ladder of the support groove at one side of an air exhaust cavity of the butterfly sheet; a channel positioned between the first pressure leaking port and the second pressure leaking port is in a zigzag shape; the first pressure leaking port and the second pressure leaking port are strip-shaped; and circular-arc-shaped through holes are formed at two ends of the first pressure leaking port and the second pressure leaking port. The pressure limiting and air leaking auxiliary brake valve device provided by the invention is compact in structure, and effectively controls the motion stroke of a piston tappet rod, improves the air exhaust back pressure value of an engine at the middle and low speeds, guarantees the small resistance of the tappet rod in reciprocating operation, prevents an inner spring from being invalid because of high temperature, thus the service life of an auxiliary brake valve device is long.
Description
Technical field
The present invention relates to a kind of complemental brake system is and in particular to the pressure limiting to a kind of circular arc pressure relief opening of vehicle is lost heart
Auxiliary braking valve gear.
Background technology
The disappointing auxiliary braking valve gear of pressure limiting is a kind of complemental brake system of vehicle, is particularly well-suited to commerial vehicle, energy
The usage frequency of the minimizing running brake of high degree, just can prevent by wagon control in the range of certain safe speed
Vehicle brake failure is it is ensured that traffic safety.
The disappointing auxiliary braking valve gear of the pressure limiting of prior art, is to rely on cylinder or the deflection of vacuum servo cylinder push-and-pull driving shaft
And tab (s) is deflected, driving shaft is fixed with rivet after inserting in tab (s), and the strength of driving shaft deflection acts on rivet, rivet
Bear very big oppressive force and be easily deformed fracture, tab (s) cannot realize its effective exercise.
China Patent No. 200710137250.x and 200810126049.6 discloses a kind of exhaust brake, including
Valve body, tab (s), support bar, support set, air relief valve, spring and adjusting screw, design when pressure exceedes setting value, is released in time
Put unnecessary pressure it is ensured that the stablizing of operating pressure, but air relief valve, when adjusting pressure and opening, can cause steam to surround bullet
Spring, very high temperature easily cause spring failure；And air relief valve, pressing plate and adjusting screw all no navigation designings, combination is unstable, pressure
Plate skew makes adjusting screw can not adjust suitable pressure；In addition, pressing plate and air relief valve easily rotate formation spring torsion causing
Spring breakage was lost efficacy.
Further, China Patent No. 200710137249.7 and 200810126050.9 discloses a kind of adjustable working pressure
Exhaust brake, which includes valve body, tab (s), support bar, support set, control bar, spring and adjusting screw, design is in pressure
When exceeding setting value, in time the unnecessary pressure of release is it is ensured that the stablizing of operating pressure, but wherein control bar is subject to air pressure
The pushing of side-thrust, causes the deflection of control bar, and frictional force easily forms clamping stagnation greatly, and leads to pressurized plane and valve body anti-
Not；Space residing for spring is not provided with regulator hole it is impossible to the back pressure in discriminant space is it is impossible to accurately adjust pressure；And, gas
Pressure feedback channel is easily blocked by the impurity in steam, forms the situation that pressure regulation has some setbacks；In addition, pressing plate no navigation designing, pressure
Plate is unstable with combining of spring, and pressing plate skew makes adjusting screw can not adjust suitable pressure.
Plug screw on the regulator of prior art and the housing of regulator, are full-closed structure.When tab (s) is closed, send out
When motivation waste gas enters the inlet chamber of valve body, a part of gas inevitably enters in the housing of regulator, to tappet
Reciprocating motion causes to hinder it is impossible to Effective Regulation exhaust back pressure.Simultaneously as the temperature of engine exhaust is very high, the knot of closing
Structure causes regulator housing cavity cannot radiate, and continuous high temperature can make pressure limiting spring temperature distortion, or even loses efficacy, auxiliary braking
The braking action of valve is seriously delayed, and sensitivity substantially reduces.Therefore, the disappointing auxiliary braking valve gear of the pressure limiting of prior art is deposited
In some technical problems anxious to be resolved.
Content of the invention
For drawbacks described above, it is an object of the invention to provide a kind of simple, efficient valve performs device, existing to solve
The technical problem of technology.
For achieving the above object, present invention employs following technical scheme:
A kind of pressure limiting of circular arc pressure relief opening is lost heart auxiliary braking valve gear, including a valve body, described valve body offers
One fixed via；One tab (s), driving shaft passes through the fixed via of described valve body that described tab (s) is fixed in body cavity, described
The edge of tab (s) has a fixed gap, and described tab (s) offers a brace groove with respect to described fixed gap；
The described brace groove of one support meanss, described support meanss and described tab (s) connects, and described support meanss combine described active
Described tab (s) is fixed in body cavity axle；One regulator, described regulator is arranged on described valve body, in order to adjust
Pressure；One pressure relief opening device, described pressure relief opening device is arranged in described tab (s), is connected to drain gas with described regulator
Body, the circular shape shape of the described brace groove of described tab (s), the first ladder, second-order are respectively by the outer genesis of described tab (s)
Ladder and the 3rd ladder, the internal diameter of described first ladder is more than the internal diameter of described second ladder, and the internal diameter of described second ladder is more than
The internal diameter of described 3rd ladder, the internal diameter of described first ladder is more than the external diameter of described guide pin bushing, and described pressure relief opening device includes: the
One pressure relief opening and the second pressure relief opening, described first pressure relief opening is located at the described brace groove of the side of inlet chamber of described tab (s)
On cell wall, positioned at the place of described 3rd ladder；Described second pressure relief opening is located at the described of the side of discharge chamber of described tab (s)
On the cell wall of brace groove, positioned between the place of described first ladder, described first pressure relief opening and described second pressure relief opening
Passage is in a zigzag, and described first pressure relief opening and described second pressure relief opening are strip through hole, the two ends of described strip through hole
For circular arc.
According to the disappointing auxiliary braking valve gear of the pressure limiting of the circular arc pressure relief opening described in the embodiment of the present invention, described driving shaft
One end through described fixed via offers a fixed groove passing through the center of circle and 2 milling sides, the width of described fixed groove
More than the thickness of fixed gap bottom tab (s), the distance in the middle of described 2 milling sides is less than the width of described fixed gap to degree, described
Fixed gap is fixedly connected described tab (s) and described driving shaft with rivet after inserting described fixed groove.
According to the disappointing auxiliary braking valve gear of the pressure limiting of the circular arc pressure relief opening described in the embodiment of the present invention, on described valve body
It is further opened with a supported hole, described supported hole is located on the valve body of described fixed via relative position, described supported hole and described
Fixed via is concentric；Described support meanss are a guide pin bushing, and described guide pin bushing is a cylinder, and described guide pin bushing is fixed on described valve body
In supported hole, described guide pin bushing projects to described body cavity, and corresponding inserted is in the brace groove of described tab (s), described tab (s)
Described first ladder of brace groove internal diameter be more than described guide pin bushing external diameter, the brace groove of described guide pin bushing and described tab (s)
Described first ladder be flexibly connected.
According to the disappointing auxiliary braking valve gear of the pressure limiting of the circular arc pressure relief opening described in the embodiment of the present invention, described pressure regulation dress
Put including: a regulator housing, described regulator housing is arranged on the outer wall of described supported hole of described valve body, described
Regulator housing is a cylinder, and described regulator housing is concentric with described supported hole, described regulator housing interior
Footpath is more than the internal diameter of described supported hole, and described regulator housing is attacked and is provided with female thread away from one end of described supported hole, described
Regulator housing is attacked and is set the internal diameter of female one end and do not attack the internal diameter setting female thread, described pressure regulation dress more than the other end
Encloser body is attacked and is set female place and offer a tightening through hole, and described regulator housing is being tapped with female thread and is not attacking
The boundary position of female thread offers escape, offers at least one passage in the radial direction of escape；One piston is endured
Bar, described bucket tappet is a cylinder, and one end of described bucket tappet is passed through described regulator housing and inserted described guide pin bushing
After project in described brace groove, the external diameter of described bucket tappet is less than the internal diameter of described guide pin bushing；One piston bush, described piston
Cover for a circular goblet, described piston bush is placed in described regulator housing, the other end of described bucket tappet and institute
State simultaneously contact connection outside the cup bottom of piston bush；One inner spring, described inner spring is placed in described regulator housing, institute
The one end stating inner spring simultaneously contacts connection with inside the cup bottom of described piston bush；One plug screw, described plug screw is a goblet, institute
The other end stating inner spring is attacked near the one end at cup bottom and is provided with simultaneously contacting connection, described plug screw inside the cup bottom of described plug screw
External screw thread, described plug screw is spirally connected with described regulator housing, and one end of described plug screw rim of a cup offers at least one breach；One
Holding screw, described holding screw screws in the described tightening through hole of described regulator housing.
According to the disappointing auxiliary braking valve gear of the pressure limiting of the circular arc pressure relief opening described in the embodiment of the present invention, described piston is endured
Bar projects in described brace groove one end after inserting described guide pin bushing is a plane cone.
According to the disappointing auxiliary braking valve gear of the pressure limiting of the circular arc pressure relief opening described in the embodiment of the present invention, described piston bush
The outer wall of cup be circular arc, the external diameter of described piston bush do not attack less than described regulator housing and sets female thread one end
Internal diameter.
Due to employing above technical characteristic so that the present invention is compared to prior art, have such advantages as and amass
Pole effect:
Firstth, the driving shaft of the present invention makes tab (s) deflection with the contact force in face so that the disappointing ancillary brake valve of pressure limiting fills
The service life put is longer；
Secondth, present configuration is simply compact, the position of effective control bucket tappet and movement travel, reduces waste gas and lets out
The serviceability of leakage auxiliary braking valve gear it is ensured that pressure limiting is lost heart；
3rd, the present invention ensures the effective exercise of tab (s), and tab (s) is good with the fitted seal of regulator, improves electromotor
Exhaust back pressure value during middle low speed；
4th, many places open up passage is it is ensured that in the regulator housing that loses heart in auxiliary braking valve gear of pressure limiting
With the unobstructed of air it is ensured that resistance when bucket tappet moves back and forth is little, Effective Regulation engine exhaust back pressure simultaneously dissipates in time in chamber
Heat, prevents inner spring to lose efficacy because of high temperature and makes service life longer.
Certainly, implement any one specific embodiment of present invention, might not have the skill of all of the above simultaneously
Art effect.
Brief description
Fig. 1 is the ancillary brake valve schematic diagram of the present invention；
Fig. 2 is the valve body schematic top plan view of the present invention；
Fig. 3 is the tab (s) schematic diagram of the present invention；
Fig. 4 is the driving shaft schematic diagram of the present invention；
Fig. 5 is the valve body cut-away diagram of the present invention；
Fig. 6 is the tab (s) cut-away diagram of the present invention；
Fig. 7 is the guide pin bushing schematic diagram of the present invention；
Fig. 8 is the plug screw schematic diagram of the present invention；
Fig. 9 is the bucket tappet schematic diagram of the present invention；
Figure 10 is the piston bush schematic diagram of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, several preferred embodiments of the present invention are described in detail, but the present invention is not restricted to
These embodiments.The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and side
Case.In order that the public has to the present invention thoroughly understanding, it is described in detail specifically thin in present invention below preferred embodiment
Section, and description without these details can also understand the present invention completely for a person skilled in the art.In addition, in order to avoid
Unnecessary obscuring is caused to the essence of the present invention, is not described in detail well-known method, process, flow process, element etc..
Refer to the ancillary brake valve schematic diagram of Fig. 1 present invention, ancillary brake valve mainly by cylinder 1, operating mechanism 2 and with
The disappointing auxiliary braking valve gear 3 of pressure limiting that it connects forms.Pressure limiting is lost heart auxiliary braking valve gear 3, including a valve body 31, a butterfly
Piece 32, support meanss, a regulator 34 and a pressure relief opening device 35, please also refer to Fig. 2, and described valve body 31 offers
One fixed via 311；Driving shaft 21 passes through the fixed via 311 of described valve body 31 that described tab (s) 32 is fixed on valve body 31 inner chamber
In；Support meanss with reference to described driving shaft 21, described tab (s) 32 are fixed in valve body 31 inner chamber；Described regulator 34 is arranged
On described valve body 31, in order to adjust pressure；And described pressure relief opening device 35 is arranged in described tab (s) 32, with described pressure regulation dress
Put 34 connections in order to vented gasses, additionally, please also refer to Fig. 3 and Fig. 4, having one to fix in the edge of described tab (s) 32 and lacking
Mouth 321, described driving shaft 21 passes through one end of described fixed via 311 to offer a fixed groove 211 and 2 passing through the center of circle
Individual milling side (not shown), the width of described fixed groove 211 is more than the thickness of fixed gap 321 bottom tab (s), described 2 milling sides
Middle distance is less than the width of described fixed gap 321, and described fixed gap 321 is inserted after described fixed groove 211 with riveting
Nail is fixedly connected described tab (s) 32 and described driving shaft 21, and thus, described fixed gap 321 inserts described fixed groove
After 211, it is that also 2 milling sides are parallel interior with two of fixed gap 321 with fixed groove 211 engaging with fixed gap 321
The engaging in face, that is, double card closes and is fixedly connected plus rivet to support described driving shaft 21 and the connection of described tab (s) 32 to transport
Dynamic, such combination is more firm.
In addition, please also refer to Fig. 3, Fig. 5, Fig. 6 and Fig. 7, described valve body 31 is further opened with a supported hole 312, described
Supported hole 312 is located on the valve body 31 of described fixed via 311 relative position, described supported hole 312 and described fixed via 311
With one heart；And in described tab (s) 32 with respect to described fixed gap 321 while offering a brace groove 322, described support is recessed
Groove 322 is a kind of circular shape shape groove；Described support meanss are the guide pin bushing 33 of a cylinder in the present embodiment, described guide pin bushing
In 33 supported holes 312 being fixed on described valve body 31, described guide pin bushing 33 projects to described valve body 31 inner chamber, and corresponding inserted is in institute
State in the brace groove 322 of tab (s) 32.
In addition, refer to Fig. 1, described regulator 34 includes: a regulator housing 341, a bucket tappet 342,
Piston bush 343, an inner spring 344, a plug screw 345 and a holding screw 346, described regulator housing 341 is arranged on described
On the outer wall of described supported hole 312 of valve body 31, described regulator housing 341 and described valve body 31 are one in the present embodiment
Body formed make, described regulator housing 341 is a cylinder, described regulator housing 341 and described supported hole 312
With one heart, the internal diameter of described regulator housing 341 be more than described supported hole 312 internal diameter, described regulator housing 341 away from
One end of described supported hole 312 is tapped with female thread, and the internal diameter that described regulator housing 341 attacks female one end is more than separately
One end does not have the internal diameter of tapping thread, and described regulator housing 341 is attacked female place and offered a tightening through hole
347；Described holding screw 346 screws in the described tightening through hole 347 of described regulator housing 341, will be tight for described plug screw 345
Tightly it is stuck in described regulator housing 341；Described bucket tappet 342 is a cylinder, one end of described bucket tappet 342
Being inserted by described regulator housing 341 projects in described brace groove 322 after described guide pin bushing 33, described bucket tappet
342 external diameter is less than the internal diameter of described guide pin bushing 33；And described piston bush 343 to be a circular goblet be placed on described regulator
In housing 341, the other end of described bucket tappet 342 simultaneously contacts connection with outside the cup bottom of described piston bush 343；In addition,
Described inner spring 344 is placed in described regulator housing 341, one end of described inner spring 344 and described piston bush 343
Inside cup bottom, simultaneously contact connects, the other end of described inner spring 344 and the simultaneously company of contact inside the cup bottom of described plug screw 345
Connect, in order to ensure that described plug screw 345 do not result in the torsion of described inner spring 344, can be in described plug screw 345 and described interior bullet
High temperature grease is coated on the contact surface of spring 344, or ensures the roughness of contact surface in below ra3.2；Additionally, described plug screw 345
For a round aecidioid body, described plug screw 345 is externally threaded near the one end at glass bottom, described plug screw 345 and described regulator shell
Body 341 is spirally connected, and one end of described plug screw 345 rim of a cup offers at least one breach 3451, and in the present embodiment, the quantity of breach is 2
Individual but can not be used for limit this patent, described regulator housing 341 is being tapped with female thread and the boundary position not having tapping thread
Put and offer escape, offer at least one passage 3411, passage in the present embodiment in the radial direction of escape
3411 quantity is 2 but can not be for limiting this patent.
In addition, refer to Fig. 6, the described brace groove 322 of described tab (s) 32 is circular shape shape groove, by described tab (s)
32 outer genesis is respectively the first ladder 3221, the second ladder 3222 and the 3rd ladder 3223, described first ladder 3221 interior
Footpath is more than the internal diameter of described second ladder 3222, and the internal diameter of described second ladder 3222 is more than the interior of described 3rd ladder 3223
Footpath；The internal diameter of described first ladder 3221 is more than the external diameter of described guide pin bushing 33, and described guide pin bushing 33 is plugged in propping up of described tab (s) 32
The place of the first ladder 3221 described in support groove 322, during described tab (s) 32 rotation, the inwall of the first ladder 3221 is led described
Smooth out on set 33 and trackslip；Described bucket tappet 342 is pressurized when moving back and forth, and the end face of described bucket tappet 342 is in institute
State activity between the second ladder 3222 and described guide pin bushing 33.
In addition, the circular shape shape groove of described brace groove 322 it is also possible to be designed to more than three ladder, such as exists
First ladder extension sets up the 0th ladder, allows described guide pin bushing 33 be inserted in the place of described 0th ladder.
In addition, refer to Fig. 6, described pressure relief opening device 35 includes: the first pressure relief opening 351 and the second pressure relief opening 352, described
First pressure relief opening 351 is located on the cell wall of described brace groove 322 of the side of inlet chamber of described tab (s) 32, positioned at described the
The place of three ladders 3223；Described second pressure relief opening 352 is located at the described brace groove of the side of discharge chamber of described tab (s) 32
On 322 cell wall, positioned at the place of described first ladder 3221, described first pressure relief opening 351 and described second pressure relief opening 352 it
Between passage be in a zigzag, zigzag passage will not produce side force, and the more stable performance of tab (s) is more preferable；Do not reach setting in air pressure
During pressure, the end face of described bucket tappet 342 is at described second ladder 3222, and when air pressure gradually rises, gas passes through institute
State the first pressure relief opening 351 to press to described bucket tappet 342, by described bucket tappet 342 towards described regulator housing 341
Direction move, when the end face of described bucket tappet 342 moves to the place of described first ladder 3221, gas passes through described the
Two pressure relief opening 352 enters discharge chamber, and the pressure of inlet chamber is releived.
Additionally, refer to Fig. 9, described bucket tappet 342 projects in described brace groove 322 after inserting described guide pin bushing 33
One end be a plane cone 3421, it is possible to reduce with described guide pin bushing 33 and described when described bucket tappet 342 is mobile
The frictional force of support groove 322, moves more smooth service life longer.
In addition, refer to Figure 10, the outer wall of the cup of described piston bush 343 is circular arc, the external diameter of described piston bush 343
There is no the internal diameter of tapping thread one end less than described regulator housing 341, described piston bush 343 is in described regulator housing
When moving in 341, the gas penetrating between described bucket tappet 342 and described guide pin bushing 33 causes described piston bush
343 skew, the outer wall of described piston bush 343 circular arc makes that skew is more smooth, and the gas also permitting the pass through is more smooth
Flowing.
Further, described piston bush 343 is contacted the one side connecting and assumes plane or groove wherein with described bucket tappet 342
A kind of shape, the present embodiment is the one side being used as with the shape of groove outside example, that is, 343 glasss of bottoms of described piston bush
It is inwardly recessed, when gas causes the skew of described piston bush 343, described bucket tappet 342 and described piston bush 343 still may be used
With stable connection, do not interfere with the performance of described regulator 34, described bucket tappet 342 is contacted with described piston bush 343
The one side connecting can design in the arc-shaped, and during skew, described bucket tappet 342 contacts more stable with described piston bush 343.
In addition, refer to Fig. 8, described 345 glasss of bottom surfaces of plug screw offer at least one passage 3452, in the present embodiment
The quantity of passage 3452 is 2, but can not be used for limiting this patent, and when tab (s) 32 is closed, engine exhaust enters valve body
During 31 inlet chamber, a part of gas inevitably enters in the housing of regulator 34, due to the temperature of engine exhaust
Very high, continuous high temperature can make inner spring 344 temperature distortion, or even lost efficacy so that the braking action of ancillary brake valve is delayed, sensitive
Degree reduces, so open up passage 3452 gas that penetrate can be discharged rapidly in air, does not interfere with described tune
The performance of pressure device 34.
Further, described first pressure relief opening 351 and described second pressure relief opening 352 are strip through hole, described strip through hole
Two ends be circular arc, square design easily leaves stress and breach in corner, due to engine exhaust temperature very
Height, continuous high temperature can make square pressure relief opening produce slight crack, reduces service life, and the design of circular arc does not just have this respect
Misgivings.
In sum, due to employ above technical characteristic so that the present invention have compared to prior art following
Advantage and good effect:
Firstth, the driving shaft of the present invention makes tab (s) deflection with the contact force in face so that the disappointing ancillary brake valve of pressure limiting fills
The service life put is longer；
Secondth, present configuration is simply compact, the position of effective control bucket tappet and movement travel, reduces waste gas and lets out
The serviceability of leakage auxiliary braking valve gear it is ensured that pressure limiting is lost heart；
3rd, the present invention ensures the effective exercise of tab (s), and tab (s) is good with the fitted seal of regulator, improves electromotor
Exhaust back pressure value during middle low speed；
4th, many places open up passage is it is ensured that in the regulator housing that loses heart in auxiliary braking valve gear of pressure limiting
With the unobstructed of air it is ensured that resistance when bucket tappet moves back and forth is little, Effective Regulation engine exhaust back pressure simultaneously dissipates in time in chamber
Heat, prevents inner spring to lose efficacy because of high temperature and makes service life longer.
Invention preferred embodiment is only intended to help illustrate the present invention.It is all of thin that preferred embodiment does not have detailed descriptionthe
Section, does not limit the specific embodiment that this invention is only described yet.Obviously, the content according to this specification, can make a lot of repairing
Change and change.This specification is chosen and is specifically described these embodiments, is to preferably explain the principle of the present invention and reality
Application, so that skilled artisan can utilize the present invention well.The present invention is only subject to claims and its complete
Portion's scope and the restriction of equivalent.Disclosed above is only presently preferred embodiments of the present invention, but is not used for limiting itself,
Any be familiar with those skilled in the art without prejudice in the case of spiritual connotation of the present invention, the impartial change done and change,
All should be within the scope of the present invention.
Claims (2)
1. a kind of disappointing auxiliary braking valve gear of pressure limiting of circular arc pressure relief opening, including a valve body, described valve body offers one
Fixed via；One tab (s), driving shaft passes through the fixed via of described valve body that described tab (s) is fixed in body cavity, described butterfly
The edge of piece has a fixed gap, and described tab (s) offers a brace groove with respect to described fixed gap；One
The described brace groove of support meanss, described support meanss and described tab (s) connects, and described support meanss combine described driving shaft
Described tab (s) is fixed in body cavity, described support meanss are a guide pin bushing；One regulator, described regulator is arranged on
On described valve body, in order to adjust pressure；One pressure relief opening device, described pressure relief opening device is arranged in described tab (s), with described tune
Pressure device connects in order to vented gasses it is characterised in that the circular shape shape of the described brace groove of described tab (s), by described butterfly
The outer genesis of piece is respectively the first ladder, the second ladder and the 3rd ladder, and the internal diameter of described first ladder is more than described second-order
The internal diameter of ladder, the internal diameter of described second ladder is more than the internal diameter of described 3rd ladder, and the internal diameter of described first ladder is more than described
The external diameter of guide pin bushing, described pressure relief opening device includes: the first pressure relief opening and the second pressure relief opening, and described first pressure relief opening is located at described butterfly
On the cell wall of described brace groove of the side of the inlet chamber of piece, positioned at the place of described 3rd ladder；Described second pressure relief opening
On the cell wall of the described brace groove of the side of the discharge chamber of described tab (s), positioned at the place of described first ladder, described
Passage between first pressure relief opening and described second pressure relief opening is in a zigzag, and described first pressure relief opening and described second pressure relief opening are
Strip through hole, the two ends of described strip through hole are circular arc.
2. the pressure limiting of circular arc pressure relief opening as claimed in claim 1 loses heart auxiliary braking valve gear it is characterised in that described master
Moving axis passes through one end of described fixed via to offer a fixed groove passing through the center of circle and 2 milling sides, described fixed groove
Width be more than the thickness of fixed gap bottom tab (s), the distance in the middle of described 2 milling sides is less than the width of described fixed gap,
Described fixed gap is fixedly connected described tab (s) and described driving shaft with rivet after inserting described fixed groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210344488.0A CN102852648B (en) | 2012-09-18 | 2012-09-18 | Pressure limiting and air leaking auxiliary brake valve device with circular-arc-shaped pressure leaking port |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210344488.0A CN102852648B (en) | 2012-09-18 | 2012-09-18 | Pressure limiting and air leaking auxiliary brake valve device with circular-arc-shaped pressure leaking port |
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| CN102852648B true CN102852648B (en) | 2017-02-01 |
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| CN102182564A (en) * | 2011-01-25 | 2011-09-14 | 浙江亿日气动科技有限公司 | Butterfly sheet of exhausting brake butterfly valve and exhausting brake butterfly valve |
| CN202900422U (en) * | 2012-09-18 | 2013-04-24 | 浙江亿日气动科技有限公司 | Pressure limiting air relief auxiliary brake valve device of arc-shaped pressure relief opening |
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| DE10159362A1 (en) * | 2001-12-04 | 2003-06-18 | Visteon Global Tech Inc | Pressure control valve, especially for exhaust systems |
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| EP0215201A2 (en) * | 1985-09-19 | 1987-03-25 | Alfred Schmidt | Dynamic pressure limiting with a safety valve |
| CN1894493A (en) * | 2003-12-16 | 2007-01-10 | 嘉娜拉企业有限公司 | Apparatus and method for pressure relief in an exhaust brake |
| CN101103190A (en) * | 2004-11-22 | 2008-01-09 | 雅各布斯车辆系统公司 | Apparatus and method for controlling exhaust pressure |
| CN201137522Y (en) * | 2007-07-15 | 2008-10-22 | 李瑞强 | Operating pressure adjustable air exhausting brake |
| CN201283860Y (en) * | 2008-08-27 | 2009-08-05 | 瑞立集团瑞安汽车零部件有限公司 | Exhaust brake butterfly valve with voltage limiting structure |
| CN102182564A (en) * | 2011-01-25 | 2011-09-14 | 浙江亿日气动科技有限公司 | Butterfly sheet of exhausting brake butterfly valve and exhausting brake butterfly valve |
| CN202900422U (en) * | 2012-09-18 | 2013-04-24 | 浙江亿日气动科技有限公司 | Pressure limiting air relief auxiliary brake valve device of arc-shaped pressure relief opening |
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| CN102852648A (en) | 2013-01-02 |
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