CN202789134U - Pressure-limiting gas relief auxiliary brake valve device with support guide sleeve - Google Patents
Pressure-limiting gas relief auxiliary brake valve device with support guide sleeve Download PDFInfo
- Publication number
- CN202789134U CN202789134U CN 201220473883 CN201220473883U CN202789134U CN 202789134 U CN202789134 U CN 202789134U CN 201220473883 CN201220473883 CN 201220473883 CN 201220473883 U CN201220473883 U CN 201220473883U CN 202789134 U CN202789134 U CN 202789134U
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- valve body
- guide pin
- pin bushing
- pressure
- regulator housing
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- Withdrawn - After Issue
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Abstract
The utility model provides a pressure-limiting gas relief auxiliary brake valve device with a support guide sleeve. The pressure-limiting gas relief auxiliary brake valve device comprises a valve body, a butterfly piece, a support device, a pressure-regulating device and a pressure relief port device, wherein a fixing through hole is formed in the valve body; a driving shaft of the butterfly piece penetrates the fixing through hole of the valve body to fix the butterfly piece in an inner cavity of the valve body, and a fixing gap is formed in the edge of the butterfly piece; a support hole is further formed in the valve body and positioned in a position, opposite to the fixing through hole, on the valve body, and the support hole and the fixing through hole are concentric; a support groove which is a circular step-like groove is formed in the butterfly piece; and the support device is the cylindrical guide sleeve and fixed in the support hole of the valve body, and the guide sleeve protrudes and extends into the inner cavity of the valve body and is correspondingly inserted into the support groove of the butterfly piece. The pressure-limiting gas relief auxiliary brake valve device disclosed by the utility model has a compact structure and can effectively control the motion stroke of the piston tappet, improve the exhaust back pressure value of an engine at middle-low speed, ensure small resistance of the piston tappet during reciprocating motion, prevent the failure of the inner spring due to high temperature and prolong the service life of the auxiliary brake valve device.
Description
Technical field
The utility model relates to a kind of complemental brake system, is specifically related to the disappointing auxiliary braking control valve unit of pressure limiting that having of a kind of vehicle supported guide pin bushing.
Background technique
The disappointing auxiliary braking control valve unit of pressure limiting is a kind of complemental brake system of vehicle, be specially adapted to commerial vehicle, greatly the frequency of utilization of the minimizing Service Brake of degree just can be controlled at vehicle in certain safety speed scope, the prevention car brakeing is malfunctioning, guarantees traffic safety.
The pressure limiting of the prior art auxiliary braking control valve unit that loses heart, to rely on cylinder or vacuum servo cylinder push-and-pull driving shaft deflection and so that the deflection of butterfly sheet, driving shaft is fixed with rivet after inserting in the butterfly sheet, the strength of driving shaft deflection acts on the rivet, rivet bears very large compressing power and is out of shape easily fracture, and the butterfly sheet can't be realized its effective exercise.
China Patent No. 200710137250.X and 200810126049.6 discloses a kind of exhaust brake, comprising valve body, butterfly sheet, strut, supporting sleeve, reduction valve, spring and adjusting screw, when design surpasses setting value at pressure, in time discharge unnecessary pressure, guarantee the stable of working pressure, when but reduction valve is opened at adjusting pressure, can cause hot gas to surround spring, very high temperature easily causes spring failure; And reduction valve, pressing plate and adjusting screw be all without navigation designing, makes up unstablely, and pressing plate is offset so that adjusting screw can not be adjusted suitable pressure; In addition, pressing plate and reduction valve easily rotate and form spring and reverse and cause spring breakage to lose efficacy.
Also have, China Patent No. 200710137249.7 and 200810126050.9 discloses a kind of exhaust brake of adjustable working pressure, comprising valve body, butterfly sheet, strut, supporting sleeve, controlling rod, spring and adjusting screw, when design surpasses setting value at pressure, in time discharge unnecessary pressure, guarantee the stable of working pressure, but wherein controlling rod is subject to the pushing of air pressure side-thrust, cause the deflection of controlling rod, frictional force is large to form clamping stagnation easily, and causes pressurized plane and valve body anti-other; The residing space of spring is not provided with regulator hole, and the back pressure in can't discriminant space can not accurately be adjusted pressure; And the air pressure feedback channel is stopped up by the impurity in the hot gas easily, forms the situation that pressure regulation has some setbacks; In addition, pressing plate is without navigation designing, and the combination of pressing plate and spring is unstable, and pressing plate is offset so that adjusting screw can not be adjusted suitable pressure.
Plug screw on the regulator of prior art and the housing of regulator are full-closed structure.When the butterfly sheet is closed, when engine exhaust entered the air-inlet cavity of valve body, a part of gas inevitably entered in the housing of regulator, and the to-and-fro motion of tappet is caused obstruction, can't the Effective Regulation exhaust back pressure.Simultaneously, because the temperature of engine exhaust is very high, the structure of sealing causes regulator housing inner chamber to dispel the heat, and continuous high temperature can make the temperature distortion of pressure limiting spring, even loses efficacy, and the braking action of ancillary brake valve seriously lags behind, and sensitivity reduces greatly.Therefore, there are some technical problems anxious to be resolved on the disappointing auxiliary braking control valve unit of the pressure limiting of prior art.
The model utility content
For defects, the purpose of this utility model provides a kind of simple and compact for structure, and the reeded pressure limiting of the driving shaft of the stable performance auxiliary braking control valve unit that loses heart is with the lose heart technical problem of auxiliary braking control valve unit of the pressure limiting that solves prior art.
For achieving the above object, the utility model has adopted following technological scheme:
A kind of disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged comprises a valve body, offers a fixed via on the described valve body; The fixed via that one butterfly sheet, driving shaft pass described valve body is fixed on described butterfly sheet in the body cavity, and the edge of described butterfly sheet offers a fixed gap; One support device, described support device is fixed on described butterfly sheet in the body cavity in conjunction with described driving shaft; One regulator, described regulator are arranged on the described valve body, in order to regulate pressure; One pressure relief opening device, described pressure relief opening device is arranged on the described butterfly sheet, is connected to drain gas with described regulator, also offers a supported hole on the described valve body, described supported hole is positioned on the valve body of described fixed via relative position, and described supported hole and described fixed via are concentric; Described butterfly sheet offers a brace groove with respect to one side of described fixed gap, and described brace groove is a circular cascade groove; Described support device is a guide pin bushing, and described guide pin bushing is a cylindrical body, and described guide pin bushing is fixed in the supported hole of described valve body, and described guide pin bushing protrudes out described body cavity, and corresponding inserted is in the brace groove of described butterfly sheet.
According to the described disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged of the utility model embodiment, described regulator comprises: 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 cylindrical body, described regulator housing is concentric with described supported hole, the internal diameter of described regulator housing is greater than the internal diameter of described supported hole, described regulator housing is attacked away from an end of described supported hole and is provided with internal thread, described regulator housing is attacked the internal diameter of an end that is provided with internal thread and is not attacked the internal diameter of establishing internal thread greater than the other end, described regulator housing is attacked the place that is provided with internal thread and is offered a tightening through hole, described regulator housing offers tool withdrawal groove in the position, boundary of attacking internal thread and not attacking internal thread, offers at least one vent in the radial direction of tool withdrawal groove; One piston tappet, described piston tappet is a cylindrical body, and an end of described piston tappet protrudes out in the described brace groove after inserting described guide pin bushing by described regulator housing, and the external diameter of described piston tappet is less than the internal diameter of described guide pin bushing; One piston sleeve, described piston sleeve are a circular goblet, and described piston sleeve is placed in the described regulator housing, and the other end of described piston tappet is connected with the cup end outside one side contact of described piston sleeve; One inner spring, described inner spring are placed in the described regulator housing, and an end of described inner spring is connected with the inboard one side contact in the cup end of described piston sleeve; One plug screw, described plug screw is a goblet, the other end of described inner spring is connected with the inboard one side contact in the cup end of described plug screw, described plug screw is attacked near an end at the cup end and is provided with outside thread, described plug screw and described regulator housing are spirally connected, and an end of described plug screw rim of a cup offers at least one breach; One Cock screw, described Cock screw screws in the described tightening through hole of described regulator housing, in addition, the described brace groove of described butterfly sheet circular stepped, outer genesis by described butterfly sheet is respectively the first ladder, the second ladder and the 3rd ladder, the internal diameter of described the first ladder is greater than the internal diameter of described the second ladder, the internal diameter of described the second ladder is greater than the internal diameter of described the 3rd ladder, the internal diameter of described the first ladder is greater than the external diameter of described guide pin bushing, described pressure relief opening device comprises: the first pressure relief opening and the second pressure relief opening, described the first pressure relief opening is positioned on the cell wall of described brace groove of a side of air-inlet cavity of described butterfly sheet, is positioned at the place of described the 3rd ladder; Described the second pressure relief opening is positioned on the cell wall of described brace groove of a side of exhaust cavity of described butterfly sheet, is positioned at the place of described the first ladder, and the passage between described the first pressure relief opening and described the second pressure relief opening is in a zigzag.
According to the described disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged of the utility model embodiment, it is a plane cone that described piston tappet inserts an end that protrudes out in the described brace groove behind the described guide pin bushing.
According to the described disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged of the utility model embodiment, the outer wall of the cup of described piston sleeve is circular arc, and the external diameter of described piston sleeve is not attacked the internal diameter of establishing internal thread one end less than described regulator housing.
According to the described disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged of the utility model embodiment, the one side that described piston sleeve is connected with described piston tappet contact presents wherein a kind of shape of plane or groove.
According to the described disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged of the utility model embodiment, described plug screw cup offers at least one vent on the bottom surface.
Since adopted above technical characteristics, so that the utility model has following advantage and good effect than prior art:
The first, driving shaft of the present utility model with the contact force of face so that the deflection of butterfly sheet the longer service life of auxiliary braking control valve unit so that pressure limiting is lost heart;
The second, the utility model is simple and compact for structure, and effectively position and the movement travel of control piston tappet reduces exhaust gas leakage, has guaranteed the usability of the disappointing auxiliary braking control valve unit of pressure limiting;
Three, the utility model guarantees the effective exercise of butterfly sheet, and the fitted seal of butterfly sheet and regulator is good, the exhaust back pressure value in the raising motor during low speed;
Four, the vent offered of many places; guaranteed pressure limiting the unobstructed of regulator housing inner chamber in the auxiliary braking control valve unit and atmosphere that lose heart; resistance when guaranteeing the to-and-fro motion of piston tappet is little; Effective Regulation engine exhaust back pressure and in time heat radiation prevent inner spring Yin Gaowen and lost efficacy and allow longer service life.
Certainly, implement any one specific embodiment of the utility model content, might not have simultaneously above whole technique effect.
Description of drawings
Fig. 1 is ancillary brake valve schematic representation of the present utility model;
Fig. 2 is valve body schematic top plan view of the present utility model;
Fig. 3 is butterfly sheet schematic representation of the present utility model;
Fig. 4 is driving shaft schematic representation of the present utility model;
Fig. 5 is valve body cut-away diagram of the present utility model;
Fig. 6 is butterfly sheet cut-away diagram of the present utility model;
Fig. 7 is guide pin bushing schematic representation of the present utility model;
Fig. 8 is plug screw schematic representation of the present utility model;
Fig. 9 is piston tappet schematic representation of the present utility model;
Figure 10 is piston sleeve schematic representation of the present utility model.
Embodiment
For ease of understanding, preferred embodiment of the present utility model is done being described in further detail below in conjunction with accompanying drawing.
Please refer to Fig. 1 ancillary brake valve schematic representation of the present utility model, ancillary brake valve mainly is comprised of the disappointing auxiliary braking control valve unit 3 of cylinder 1, operating device 2 and connected pressure limiting.The pressure limiting auxiliary braking control valve unit 3 that loses heart comprises a valve body 31, a butterfly sheet 32, a support device, a regulator 34 and a pressure relief opening device 35, please also refer to Fig. 2, offers a fixed via 311 on the described valve body 31; The fixed via 311 that driving shaft 21 passes described valve body 31 is fixed on described butterfly sheet 32 in valve body 31 inner chambers; Support device is fixed on described butterfly sheet 32 in valve body 31 inner chambers in conjunction with described driving shaft 21; Described regulator 34 is arranged on the described valve body 31, in order to regulate pressure; And described pressure relief opening device 35 is arranged on the described butterfly sheet 32, be connected to drain gas with described regulator 34, in addition, please also refer to Fig. 3 and Fig. 4, offer a fixed gap 321 at the edge of described butterfly sheet 32, the end that described driving shaft 21 passes described fixed via 311 offer one by the center of circle fixed groove 211 and 2 mill the limit (not shown), the width of described fixed groove 211 is greater than the thickness of fixed gap 321 bottom butterfly sheets, described 2 are milled the middle distance in limit less than the width of described fixed gap 321, after inserting described fixed groove 211, described fixed gap 321 is fixedly connected with described butterfly sheet 32 and described driving shaft 21 with rivet, thus, after described fixed gap 321 is inserted described fixed groove 211, engaging with fixed groove 211 and fixed gap 321, also have 2 engagings of milling limit and two parallel inner faces of fixed gap 321, namely double card is closed and is added that rivet is fixedly connected with to support the motion that is connected of described driving shaft 21 and described butterfly sheet 32, and such combination is more firm.
In addition, please also refer to Fig. 3, Fig. 5, Fig. 6 and Fig. 7, also offer a supported hole 312 on the described valve body 31, described supported hole 312 is positioned on the valve body 31 of described fixed via 311 relative positions, and described supported hole 312 and described fixed via 311 are concentric; And offering a brace groove 322 at described butterfly sheet 32 with respect to one side of described fixed gap 321, described brace groove 322 is a kind of circular cascade groove; Described support device is the guide pin bushing 33 of a cylindrical body in the present embodiment, and described guide pin bushing 33 is fixed in the supported hole 312 of described valve body 31, and described guide pin bushing 33 protrudes out described valve body 31 inner chambers, and corresponding inserted is in the brace groove 322 of described butterfly sheet 32.
In addition, please refer to Fig. 1, described regulator 34 comprises: a regulator housing 341, one piston tappet 342, one piston sleeve 343, one inner spring 344, one plug screw 345 and a Cock screw 346, described regulator housing 341 is arranged on the outer wall of described supported hole 312 of described valve body 31, described regulator housing 341 and described valve body 31 are made of one piece in the present embodiment, described regulator housing 341 is a cylindrical body, described regulator housing 341 is concentric with described supported hole 312, the internal diameter of described regulator housing 341 is greater than the internal diameter of described supported hole 312, described regulator housing 341 has been attacked internal thread away from an end of described supported hole 312, the internal diameter that described regulator housing 341 is attacked a female end is not attacked the internal diameter of internal thread greater than the other end, and described regulator housing 341 is attacked female place and offered a tightening through hole 347; Described Cock screw 346 screws in the described tightening through hole 347 of described regulator housing 341, and described plug screw 345 is stuck in the described regulator housing 341 tightly; Described piston tappet 342 is cylindrical bodys, and an end of described piston tappet 342 protrudes out in the described brace groove 322 after inserting described guide pin bushing 33 by described regulator housing 341, and the external diameter of described piston tappet 342 is less than the internal diameter of described guide pin bushing 33; And described piston sleeve 343 to be circular goblets be placed in the described regulator housing 341, the other end of described piston tappet 342 is connected with the cup end outside one side contact of described piston sleeve 343; In addition, described inner spring 344 is placed in the described regulator housing 341, one end of described inner spring 344 is connected with the inboard one side contact in the cup end of described piston sleeve 343, the other end of described inner spring 344 is connected with the inboard one side contact in the cup end of described plug screw 345, in order to guarantee that described plug screw 345 can not cause reversing of described inner spring 344, can coat high temperature grease at described plug screw 345 and the surface of contact of described inner spring 344, guarantee that perhaps the roughness of surface of contact is below Ra3.2; In addition, described plug screw 345 is a round aecidioid body, described plug screw 345 near glass at the bottom of an end attacked outside thread, described plug screw 345 is spirally connected with described regulator housing 341, one end of described plug screw 345 rims of a cup offers at least one breach 3451, the quantity of breach is 2 but can not be used for limiting this patent in the present embodiment, described regulator housing 341 offers tool withdrawal groove in the position, boundary of attacking internal thread and not attacking internal thread, radial direction at tool withdrawal groove offers at least one vent 3411, and the quantity of vent 3411 is 2 but can not be used for limiting this patent in the present embodiment.
In addition, please refer to Fig. 6, the described brace groove 322 of described butterfly sheet 32 is circular cascade groove, outer genesis by described butterfly sheet 32 is respectively the first ladder 3221, the second ladder 3222 and the 3rd ladder 3223, the internal diameter of described the first ladder 3221 is greater than the internal diameter of described the second ladder 3222, and the internal diameter of described the second ladder 3222 is greater than the internal diameter of described the 3rd ladder 3223; The internal diameter of described the first ladder 3221 is greater than the external diameter of described guide pin bushing 33, described guide pin bushing 33 is plugged in the place of the first ladder 3221 described in the brace groove 322 of described butterfly sheet 32, inwall smooth-going trackslipping on described guide pin bushing 33 of the first ladder 3221 during described butterfly sheet 32 rotation; When described piston tappet 342 pressurizeds moved back and forth, the end face of described piston tappet 342 was movable between described the second ladder 3222 and described guide pin bushing 33.
In addition, the circular cascade groove of described brace groove 322 also can be designed to for example set up the 0th ladder in the first ladder extension more than three ladders, allows described guide pin bushing 33 be inserted in the place of described the 0th ladder.
In addition, please refer to Fig. 6, described pressure relief opening device 35 comprises: the first pressure relief opening 351 and the second pressure relief opening 352, described the first pressure relief opening 351 are positioned on the cell wall of described brace groove 322 of a side of air-inlet cavity of described butterfly sheet 32, are positioned at the place of described the 3rd ladder 3223; Described the second pressure relief opening 352 is positioned on the cell wall of described brace groove 322 of a side of exhaust cavity of described butterfly sheet 32, be positioned at the place of described the first ladder 3221, passage between described the first pressure relief opening 351 and described the second pressure relief opening 352 is in a zigzag, passage can not produce lateral force in a zigzag, and butterfly sheet more stability is better; When air pressure does not reach setting pressure, the end face of described piston tappet 342 is at described the second ladder 3222 places, when air pressure raises gradually, gas is exerted pressure to described piston tappet 342 by described the first pressure relief opening 351, described piston tappet 342 is moved towards the direction of described regulator housing 341, when the end face of described piston tappet 342 moves to the place of described the first ladder 3221, gas enters exhaust cavity by described the second pressure relief opening 352, and the pressure of air-inlet cavity is releived.
In addition, please refer to Fig. 9, it is a plane cone 3421 that described piston tappet 342 inserts an end that protrudes out in the described brace groove 322 behind the described guide pin bushing 33, in the time of can reducing described piston tappet 342 and move and the frictional force of described guide pin bushing 33 and described brace groove 322, the mobile more smooth and easy longer service life of getting up.
In addition, please refer to Figure 10, the outer wall of the cup of described piston sleeve 343 is circular arc, the external diameter of described piston sleeve 343 is not attacked the internal diameter of internal thread one end less than described regulator housing 341, when described piston sleeve 343 moves in described regulator housing 341, cause the skew of described piston sleeve 343 via the gas that penetrates between described piston tappet 342 and the described guide pin bushing 33, the outer wall of described piston sleeve 343 circular arcs is so that skew is more sliding suitable, also so that the gas that penetrates is more mobile.
Also have, the one side that described piston sleeve 343 is connected with 342 contacts of described piston tappet presents the wherein a kind of shape of plane or groove, present embodiment is that the shape with groove is used as example, namely 343 glasss of basolateral one sides of described piston sleeve are inwardly recessed, when gas causes the skew of described piston sleeve 343, described piston tappet 342 be connected the connection that piston sleeve 343 still can be stable, can not affect the performance of described regulator 34, described piston tappet 342 can be designed to circular arc with the one side that described piston sleeve 343 contacts are connected, during skew, described piston tappet 342 contacts more stable with described piston sleeve 343.
In addition, please refer to Fig. 8, described plug screw offers at least one vent 3452 on 345 glasss of bottom surfaces, the quantity of vent 3452 is 2 in the present embodiment, but can not be used for limiting this patent, when butterfly sheet 32 is closed, when engine exhaust entered the air-inlet cavity of valve body 31, a part of gas inevitably entered in the housing of regulator 34, because the temperature of engine exhaust is very high, continuous high temperature can make inner spring 344 temperature distortions, even lost efficacy, so that the braking action of ancillary brake valve lags behind sensitivity, the gas that penetrates can be discharged rapidly in the atmosphere so offer vent 3452, can not affect the performance of described regulator 34.
Also have, described the first pressure relief opening 351 and described the second pressure relief opening 352 are the long strip through hole, the two ends of described long strip through hole are circular arc, square design stays stress and breach at corner easily, because the temperature of engine exhaust is very high, the continuous high temperature meeting reduces working life so that square pressure relief opening produces slight crack, and the design of circular arc does not just have the misgivings of this respect.
Since adopted above technical characteristics, so that the utility model has following advantage and good effect than prior art:
The first, driving shaft of the present utility model with the contact force of face so that the deflection of butterfly sheet the longer service life of auxiliary braking control valve unit so that pressure limiting is lost heart;
The second, the utility model is simple and compact for structure, and effectively position and the movement travel of control piston tappet reduces exhaust gas leakage, has guaranteed the usability of the disappointing auxiliary braking control valve unit of pressure limiting;
Three, the utility model guarantees the effective exercise of butterfly sheet, and the fitted seal of butterfly sheet and regulator is good, the exhaust back pressure value in the raising motor during low speed;
Four, the vent offered of many places; guaranteed pressure limiting the unobstructed of regulator housing inner chamber in the auxiliary braking control valve unit and atmosphere that lose heart; resistance when guaranteeing the to-and-fro motion of piston tappet is little; Effective Regulation engine exhaust back pressure and in time heat radiation prevent inner spring Yin Gaowen and lost efficacy and allow longer service life.
Certainly, implement any one specific embodiment of the utility model content, might not have simultaneously above whole technique effect.More than disclosed only be preferred embodiment of the present utility model; but be not to limit itself; anyly have the knack of those skilled in the art in the situation of the utility model spiritual connotation, the equalization of doing changes and changes, and all should drop in the protection domain of the present utility model.
Claims (6)
1. one kind has the disappointing auxiliary braking control valve unit of the pressure limiting of supporting guide pin bushing, comprises a valve body, offers a fixed via on the described valve body; The fixed via that one butterfly sheet, driving shaft pass described valve body is fixed on described butterfly sheet in the body cavity, and the edge of described butterfly sheet offers a fixed gap; One support device, described support device is fixed on described butterfly sheet in the body cavity in conjunction with described driving shaft; One regulator, described regulator are arranged on the described valve body, in order to regulate pressure; One pressure relief opening device, described pressure relief opening device is arranged on the described butterfly sheet, be connected to drain gas with described regulator, it is characterized in that, also offer a supported hole on the described valve body, described supported hole is positioned on the valve body of described fixed via relative position, and described supported hole and described fixed via are concentric; Described butterfly sheet offers a brace groove with respect to one side of described fixed gap, and described brace groove is a circular cascade groove; Described support device is a guide pin bushing, and described guide pin bushing is a cylindrical body, and described guide pin bushing is fixed in the supported hole of described valve body, and described guide pin bushing protrudes out described body cavity, and corresponding inserted is in the brace groove of described butterfly sheet.
2. as claimed in claim 1 have the pressure limiting of supporting a guide pin bushing auxiliary braking control valve unit that loses heart, it is characterized in that, described regulator comprises: 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 cylindrical body, described regulator housing is concentric with described supported hole, the internal diameter of described regulator housing is greater than the internal diameter of described supported hole, described regulator housing is attacked away from an end of described supported hole and is provided with internal thread, described regulator housing is attacked the internal diameter of an end that is provided with internal thread and is not attacked the internal diameter of establishing internal thread greater than the other end, described regulator housing is attacked the place that is provided with internal thread and is offered a tightening through hole, described regulator housing offers tool withdrawal groove in the position, boundary of attacking internal thread and not attacking internal thread, offers at least one vent in the radial direction of tool withdrawal groove; One piston tappet, described piston tappet is a cylindrical body, and an end of described piston tappet protrudes out in the described brace groove after inserting described guide pin bushing by described regulator housing, and the external diameter of described piston tappet is less than the internal diameter of described guide pin bushing; One piston sleeve, described piston sleeve are a circular goblet, and described piston sleeve is placed in the described regulator housing, and the other end of described piston tappet is connected with the cup end outside one side contact of described piston sleeve; One inner spring, described inner spring are placed in the described regulator housing, and an end of described inner spring is connected with the inboard one side contact in the cup end of described piston sleeve; One plug screw, described plug screw is a goblet, the other end of described inner spring is connected with the inboard one side contact in the cup end of described plug screw, described plug screw is attacked near an end at the cup end and is provided with outside thread, described plug screw and described regulator housing are spirally connected, and an end of described plug screw rim of a cup offers at least one breach; One Cock screw, described Cock screw screws in the described tightening through hole of described regulator housing, in addition, the described brace groove of described butterfly sheet circular stepped, outer genesis by described butterfly sheet is respectively the first ladder, the second ladder and the 3rd ladder, the internal diameter of described the first ladder is greater than the internal diameter of described the second ladder, the internal diameter of described the second ladder is greater than the internal diameter of described the 3rd ladder, the internal diameter of described the first ladder is greater than the external diameter of described guide pin bushing, described pressure relief opening device comprises: the first pressure relief opening and the second pressure relief opening, described the first pressure relief opening is positioned on the cell wall of described brace groove of a side of air-inlet cavity of described butterfly sheet, is positioned at the place of described the 3rd ladder; Described the second pressure relief opening is positioned on the cell wall of described brace groove of a side of exhaust cavity of described butterfly sheet, is positioned at the place of described the first ladder, and the passage between described the first pressure relief opening and described the second pressure relief opening is in a zigzag.
3. the disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged as claimed in claim 2 is characterized in that it is a plane cone that described piston tappet inserts an end that protrudes out in the described brace groove behind the described guide pin bushing.
4. the disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged as claimed in claim 3 is characterized in that the outer wall of the cup of described piston sleeve is circular arc, and the external diameter of described piston sleeve is not attacked the internal diameter of establishing internal thread one end less than described regulator housing.
5. the disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged as claimed in claim 4 is characterized in that, the one side that described piston sleeve is connected with described piston tappet contact presents wherein a kind of shape of plane or groove.
6. the disappointing auxiliary braking control valve unit of pressure limiting that the support guide pin bushing is arranged as claimed in claim 5 is characterized in that described plug screw cup offers at least one vent on the bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220473883 CN202789134U (en) | 2012-09-18 | 2012-09-18 | Pressure-limiting gas relief auxiliary brake valve device with support guide sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220473883 CN202789134U (en) | 2012-09-18 | 2012-09-18 | Pressure-limiting gas relief auxiliary brake valve device with support guide sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789134U true CN202789134U (en) | 2013-03-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220473883 Withdrawn - After Issue CN202789134U (en) | 2012-09-18 | 2012-09-18 | Pressure-limiting gas relief auxiliary brake valve device with support guide sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789134U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852650A (en) * | 2012-09-18 | 2013-01-02 | 浙江亿日气动科技有限公司 | Pressure limiting and air leaking auxiliary brake valve device with supporting guide sleeve |
| WO2015180507A1 (en) * | 2014-05-28 | 2015-12-03 | 昆山隆中麦士格瑞汽车部件有限公司 | Constant pressure-type exhaust brake butterfly valve |
-
2012
- 2012-09-18 CN CN 201220473883 patent/CN202789134U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852650A (en) * | 2012-09-18 | 2013-01-02 | 浙江亿日气动科技有限公司 | Pressure limiting and air leaking auxiliary brake valve device with supporting guide sleeve |
| CN102852650B (en) * | 2012-09-18 | 2015-12-30 | 浙江亿日气动科技有限公司 | Have and support the pressure limiting of guide pin bushing and to lose heart auxiliary braking control valve unit |
| WO2015180507A1 (en) * | 2014-05-28 | 2015-12-03 | 昆山隆中麦士格瑞汽车部件有限公司 | Constant pressure-type exhaust brake butterfly valve |
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