CN102889139A - Pressure-limit air-leakage auxiliary braking valve device with air vent of piston tappet sleeve - Google Patents
Pressure-limit air-leakage auxiliary braking valve device with air vent of piston tappet sleeve Download PDFInfo
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- CN102889139A CN102889139A CN2012104105200A CN201210410520A CN102889139A CN 102889139 A CN102889139 A CN 102889139A CN 2012104105200 A CN2012104105200 A CN 2012104105200A CN 201210410520 A CN201210410520 A CN 201210410520A CN 102889139 A CN102889139 A CN 102889139A
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Abstract
The invention relates to a pressure-limit air-leakage auxiliary braking valve device with an air vent of a piston tappet sleeve. The pressure-limit air-leakage auxiliary braking valve device comprises a valve body, a butterfly sheet, a supporting device, a pressure adjusting device and a decompression opening device, wherein the pressure adjusting device comprises the piston tappet sleeve; the piston tappet sleeve comprises a piston tappet part and a piston sleeve part, which are integrally manufactured; the piston tappet part is a cylinder; one end of the piston tappet part convexly extends into a supporting groove through the supporting device, and moves by receiving different air pressures transmitted by the decompression opening device; one end of the piston tappet part, which is inserted into the supporting groove, is an end face; and furthermore, a pressure stabilizing ventilation hole is formed in a valve body at one side of an air inlet cavity, and is communicated with the air inlet cavity and the pressure adjusting device. The pressure-limit air-leakage auxiliary braking valve device provided by the invention has the advantages that the structure is compact; the motion process of the piston tappet sleeve is effectively controlled; the exhaust back pressure value with the low speed in an engine is increased; the resistance is small when the piston tappet sleeve does the reciprocating motion; and an inner spring is prevented from losing efficiency due to a high temperature, so that the service life of the pressure-limit air-leakage auxiliary braking valve device can be long.
Description
Technical field
The present invention relates to a kind of complemental brake system, be specifically related to a kind of disappointing auxiliary braking control valve unit of the pressure limiting that piston tappet sleeve pore is arranged of vehicle.
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.
Summary of the invention
For defects, the purpose of this invention is to provide a kind of simple, disappointing auxiliary braking control valve unit of efficiently pressure limiting, to solve the technical problem of prior art.
For achieving the above object, the present invention has adopted following technological scheme:
A kind of disappointing auxiliary braking control valve unit of pressure limiting that piston tappet sleeve pore 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 described butterfly sheet is respectively arranged with a fixed gap and a brace groove on the relative two edges by the center of circle; 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, described pressure relief opening device comprises: the first pressure relief opening and the second pressure relief opening, described regulator comprises a piston tappet sleeve, described piston tappet sleeve comprises: a piston tappet section and a piston sleeve section, one-body molded the making of described piston tappet section and described piston sleeve section; Described piston tappet section is a cylindrical body, one end of described piston tappet section protrudes out in the described brace groove after by described support device, described piston tappet section is between described support device and described brace groove, accept described pressure relief opening device and transmit different air pressure and move, the end that described piston tappet section inserts in the described brace groove is an end face; Described piston sleeve section is a circular goblet, the outside, the cup end and the piston tappet section connection of being connected of described piston sleeve section, and described piston tappet section and described piston sleeve section are concentric; Also have, offer a voltage stabilizing vent at the described valve body of a side of air-inlet cavity, an end of described voltage stabilizing vent is air-inlet cavity, and the other end of described voltage stabilizing vent is described regulator.
According to the described disappointing auxiliary braking control valve unit of pressure limiting that piston tappet sleeve pore is arranged of the embodiment of the invention, 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; The described brace groove of described butterfly sheet 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 piston tappet sleeve pore is arranged of the embodiment of the invention, 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 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 piston tappet sleeve pore is arranged of the embodiment of the invention, the described brace groove of described butterfly sheet circular stepped, outer genesis by described butterfly sheet is respectively the first ladder and the second 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 first ladder is greater than the external diameter of described guide pin bushing, 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 second 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 piston tappet sleeve pore is arranged of the embodiment of the invention, the end that described driving shaft passes described fixed via offer one by the center of circle fixed groove and 2 mill the limit, the width of described fixed groove is greater than the thickness of fixed gap bottom butterfly sheet, described 2 are milled the middle distance in limit less than the width of described fixed gap, and described fixed gap is fixedly connected with described butterfly sheet and described driving shaft with rivet after inserting described fixed groove.
According to the described disappointing auxiliary braking control valve unit of pressure limiting that piston tappet sleeve pore is arranged of the embodiment of the invention, described regulator also 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
,Described piston tappet sleeve is placed in the described regulator housing; 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 section; 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 screw in the described tightening through hole of described regulator housing.
According to the described pressure limiting that piston tappet sleeve pore arranged of the embodiment of the invention auxiliary braking control valve unit that loses heart, the external diameter of described piston sleeve section 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 piston tappet sleeve pore is arranged of the embodiment of the invention, described plug screw cup offers at least one vent on the bottom surface.
According to the described disappointing auxiliary braking control valve unit of pressure limiting that piston tappet sleeve pore is arranged of the embodiment of the invention, described the first pressure relief opening and described the second pressure relief opening are the long strip through hole, and the two ends of described long strip through hole are circular arc.
Since adopted above technical characteristics, so that the present invention, has following advantage and good effect than prior art:
The first, driving shaft of the present invention 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 present invention is simple and compact for structure, and effectively position and the movement travel of control piston tappet sleeve reduces exhaust gas leakage, has guaranteed the usability of the disappointing auxiliary braking control valve unit of pressure limiting;
Three, the present invention guarantees the effective exercise of butterfly sheet, and the fitted seal of butterfly sheet and regulator is good, the exhaust back pressure value when improving low speed in the motor;
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 sleeve 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 content of the present invention, might not have simultaneously above whole technique effect.
Description of drawings
Fig. 1 is ancillary brake valve schematic representation of the present invention;
Fig. 2 is valve body schematic top plan view of the present invention;
Fig. 3 is butterfly sheet schematic representation of the present invention;
Fig. 4 is driving shaft schematic representation of the present invention;
Fig. 5 is valve body cut-away diagram of the present invention;
Fig. 6 is butterfly sheet cut-away diagram of the present invention;
Fig. 7 is guide pin bushing schematic representation of the present invention;
Fig. 8 is plug screw schematic representation of the present invention;
Fig. 9 is piston tappet sleeve schematic representation of the present invention;
Figure 10 is another butterfly sheet schematic representation of the present invention;
Figure 11 is another butterfly sheet cut-away diagram of the present invention.
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 is contained any in substituting of making of marrow of the present invention and scope, modification, equivalent method and scheme.Understand for the public is had thoroughly the present invention, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have for a person skilled in the art the description of these details also can understand the present invention fully.In addition, for fear of essence of the present invention is caused unnecessary obscuring, do not describe well-known method, process, flow process, element etc. in detail.
Please refer to Fig. 1 ancillary brake valve schematic representation of the present invention, 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 and Fig. 9, described regulator 34 comprises: a regulator housing 341, one piston tappet sleeve 342, 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; As shown in Figure 9, described piston tappet sleeve 342 comprises: a piston tappet section 3421 and a piston sleeve section 3422, described piston tappet section 3421 and described piston sleeve section 3422 one-body molded making.
Described piston tappet section 3421 is a cylindrical body, one end of described piston tappet section 3421 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 section 3421 is less than the internal diameter of described guide pin bushing 33; Described piston tappet section 3421 is between described support device (described support device is the guide pin bushing 33 of a cylindrical body in the present embodiment) and described brace groove 322, accept described pressure relief opening device and transmit different air pressure and move, the end that described piston tappet section 3421 inserts in the described brace groove is an end face 3423; Described piston sleeve section 3422 is a circular goblet, the outside, the cup end of described piston sleeve section 3422 and piston tappet section 3421 connections of being connected, described piston tappet section 3421 and described piston sleeve section 3422 are concentric, the diameter of piston sleeve section 3422 is greater than the internal diameter of guide pin bushing 33, therefore, after piston tappet section 3421 inserted described guide pin bushing 33, piston sleeve section 3422 was retained in the described regulator housing 341.
Also have, please refer to Fig. 1 and Fig. 5, described valve body 31 in a side of air-inlet cavity offers a voltage stabilizing vent 313, one end of described voltage stabilizing vent 313 is air-inlet cavitys, the other end of described voltage stabilizing vent 313 is sides that regulator housing 341 is not attacked internal thread, when the air pressure of air-inlet cavity one side reaches setting value, the described pressure relief opening device of described piston tappet sleeve 342 acceptance transmits different air pressure and moves, arranging directly the air pressure compressing of air-inlet cavity one side in described piston sleeve section 3422 of described voltage stabilizing vent 313, so, can be more smooth and easy so that piston tappet sleeve 342 moves, excessive frictions can not occur with regulator housing 341 or block in piston tappet sleeve 342.
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 section 3422, 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 sleeve 342 pressurizeds moved back and forth, the end face 3423 of the described piston tappet section 3421 of described piston tappet sleeve 342 was movable between described the first ladder 3221 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 and Fig. 9, 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 3423 of the described piston tappet section 3421 of described piston tappet sleeve 342 is at described the first ladder 3221 places, when air pressure raises gradually, gas is exerted pressure to described piston tappet sleeve 342 by described the first pressure relief opening 351, described piston tappet sleeve 342 is moved towards the direction of described regulator housing 341, move to the place of described the second pressure relief opening 352 when the end face 3423 of the described piston tappet section 3421 of described piston tappet sleeve 342, gas is smooth and easy to enter exhaust cavity by described the second pressure relief opening 352, and the pressure of air-inlet cavity is releived.
Another mode of execution of the present invention, please refer to Fig. 9, Figure 10 and Figure 11, the described brace groove 322 of described butterfly sheet circular stepped, outer genesis by described butterfly sheet is respectively the first ladder 3224 and the second ladder 3225, the internal diameter of described the first ladder 3224 is greater than the internal diameter of described the second ladder 3225, the internal diameter of described the first ladder 3224 is greater than the external diameter of described guide pin bushing 33, described the first pressure relief opening 351 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 second ladder 3225; Described the second pressure relief opening 352 is positioned on the cell wall of described brace groove of a side of exhaust cavity of described butterfly sheet, be positioned at the place of described the first ladder 3224, 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.Described guide pin bushing 33 is plugged in the place of the first ladder 3224 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 3224 during described butterfly sheet 32 rotation; When described piston tappet sleeve 342 pressurizeds moved back and forth, the end face 3423 of the described piston tappet section 3421 of described piston tappet sleeve 342 was movable between described the first ladder 3224 and described guide pin bushing 33.When air pressure does not reach setting pressure, the end face 3423 of the described piston tappet section 3421 of described piston tappet sleeve 342 is at described the first ladder 3224 places, when air pressure raises gradually, gas is exerted pressure to described piston tappet sleeve 342 by described the first pressure relief opening 351, described piston tappet sleeve 342 is moved towards the direction of described regulator housing 341, move to the place of described the second pressure relief opening 352 when the end face 3423 of the described piston tappet section 3421 of described piston tappet sleeve 342, gas is smooth and easy to enter 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, an end that protrudes out in the described brace groove 322 behind the described guide pin bushing 33 of described piston tappet section's 3421 insertions of described piston tappet sleeve 342 is an end face 3423, end face can be more firm contact with brace groove 322, and when accepting gas pressure and moving, can be more steady, move more smooth and easy longer service life; In addition, the section of the outer wall of the cup of described piston sleeve section 3422 is lineal shape, the external diameter of described piston sleeve section 3422 is not attacked the internal diameter of internal thread one end less than described regulator housing 341, described piston sleeve section 3422 is in described regulator housing 341, and rectilinear design is so that flow more smoothly via the gas that penetrates between described piston tappet section 3421 and the described guide pin bushing 33.
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.
In sum, owing to adopted above technical characteristics, so that the present invention has following advantage and good effect than prior art:
The first, driving shaft of the present invention 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 present invention is simple and compact for structure, and effectively position and the movement travel of control piston tappet sleeve reduces exhaust gas leakage, has guaranteed the usability of the disappointing auxiliary braking control valve unit of pressure limiting;
Three, the present invention guarantees the effective exercise of butterfly sheet, and the fitted seal of butterfly sheet and regulator is good, the exhaust back pressure value when improving low speed in the motor;
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 sleeve 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.
The invention preferred embodiment just is used for helping to set forth the present invention.Preferred embodiment does not have all details of detailed descriptionthe, does not limit this invention yet and only is described embodiment.Obviously, according to the content of this specification, can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to explain better principle of the present invention and practical application, thereby the technical field technician can utilize the present invention well under making.The present invention only is subjected to the restriction of claims and four corner and equivalent.More than disclosed only be preferred embodiment of the present invention; but be not to limit itself; anyly have the knack of those skilled in the art in the situation of spiritual connotation of the present invention, the equalization of doing changes and changes, and all should drop in protection scope of the present invention.
Claims (9)
1. the disappointing auxiliary braking control valve unit of pressure limiting that piston tappet sleeve pore 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 described butterfly sheet is respectively arranged with a fixed gap and a brace groove on the relative two edges by the center of circle; 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, described pressure relief opening device comprises: the first pressure relief opening and the second pressure relief opening, it is characterized in that, described regulator comprises a piston tappet sleeve, and described piston tappet sleeve comprises: a piston tappet section and a piston sleeve section, one-body molded the making of described piston tappet section and described piston sleeve section;
Described piston tappet section is a cylindrical body, one end of described piston tappet section protrudes out in the described brace groove after by described support device, described piston tappet section is between described support device and described brace groove, accept described pressure relief opening device and transmit different air pressure and move, the end that described piston tappet section inserts in the described brace groove is an end face;
Described piston sleeve section is a circular goblet, the outside, the cup end and the piston tappet section connection of being connected of described piston sleeve section, and described piston tappet section and described piston sleeve section are concentric;
Also have, offer a voltage stabilizing vent at the described valve body of a side of air-inlet cavity, an end of described voltage stabilizing vent is air-inlet cavity, and the other end of described voltage stabilizing vent is described regulator.
2. the pressure limiting that piston tappet sleeve pore the arranged as claimed in claim 1 auxiliary braking control valve unit that loses heart, 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; The described brace groove of described butterfly sheet 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.
3. the pressure limiting that piston tappet sleeve pore the arranged as claimed in claim 2 auxiliary braking control valve unit that loses heart, it is characterized in that, 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 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.
4. the pressure limiting that piston tappet sleeve pore the arranged as claimed in claim 2 auxiliary braking control valve unit that loses heart, it is characterized in that, the described brace groove of described butterfly sheet circular stepped, outer genesis by described butterfly sheet is respectively the first ladder and the second 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 first ladder is greater than the external diameter of described guide pin bushing, 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 second 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.
5. such as claim 3 or the 4 described disappointing auxiliary braking control valve units of pressure limiting that piston tappet sleeve pore is arranged, it is characterized in that, the end that described driving shaft passes described fixed via offer one by the center of circle fixed groove and 2 mill the limit, the width of described fixed groove is greater than the thickness of fixed gap bottom butterfly sheet, described 2 are milled the middle distance in limit less than the width of described fixed gap, and described fixed gap is fixedly connected with described butterfly sheet and described driving shaft with rivet after inserting described fixed groove.
6. the pressure limiting that piston tappet sleeve pore the arranged as claimed in claim 5 auxiliary braking control valve unit that loses heart is characterized in that described regulator also comprises:
One 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
,Described piston tappet sleeve is placed in the described regulator housing;
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 section;
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 screw in the described tightening through hole of described regulator housing.
7. the pressure limiting that piston tappet sleeve pore the arranged as claimed in claim 6 auxiliary braking control valve unit that loses heart is characterized in that, the external diameter of described piston sleeve section is not attacked the internal diameter of establishing internal thread one end less than described regulator housing.
8. the disappointing auxiliary braking control valve unit of pressure limiting that piston tappet sleeve pore is arranged as claimed in claim 7 is characterized in that described plug screw cup offers at least one vent on the bottom surface.
9. the disappointing auxiliary braking control valve unit of pressure limiting that piston tappet sleeve pore is arranged as claimed in claim 8 is characterized in that described the first pressure relief opening and described the second pressure relief opening are the long strip through hole, and the two ends of described long strip through hole are circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410520.0A CN102889139B (en) | 2012-10-25 | 2012-10-25 | Have bucket tappet to overlap the pressure limiting of pore to lose heart auxiliary braking control valve unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410520.0A CN102889139B (en) | 2012-10-25 | 2012-10-25 | Have bucket tappet to overlap the pressure limiting of pore to lose heart auxiliary braking control valve unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102889139A true CN102889139A (en) | 2013-01-23 |
| CN102889139B CN102889139B (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210410520.0A Active CN102889139B (en) | 2012-10-25 | 2012-10-25 | Have bucket tappet to overlap the pressure limiting of pore to lose heart auxiliary braking control valve unit |
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| CN (1) | CN102889139B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07145866A (en) * | 1993-11-24 | 1995-06-06 | Fuji Oozx Inc | Moldingmethod for butterfly type valve disc |
| JPH11294200A (en) * | 1998-04-07 | 1999-10-26 | Jidosha Kiki Co Ltd | Butterfly valve |
| EP0835998B1 (en) * | 1996-10-11 | 2002-01-09 | Ecia - Equipements Et Composants Pour L'industrie Automobile | Valve, especially for an exhaust pipe manifold |
| CN101251049A (en) * | 2007-07-15 | 2008-08-27 | 李瑞强 | Exhaust brake capable of adjusting working pressure |
| CN201963407U (en) * | 2011-01-25 | 2011-09-07 | 浙江亿日气动科技有限公司 | Exhaust brake butterfly valve |
| CN202883128U (en) * | 2012-10-25 | 2013-04-17 | 浙江亿日气动科技有限公司 | Pressure limiting air leakage auxiliary braking valve device with piston tappet sleeve air hole |
-
2012
- 2012-10-25 CN CN201210410520.0A patent/CN102889139B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07145866A (en) * | 1993-11-24 | 1995-06-06 | Fuji Oozx Inc | Moldingmethod for butterfly type valve disc |
| EP0835998B1 (en) * | 1996-10-11 | 2002-01-09 | Ecia - Equipements Et Composants Pour L'industrie Automobile | Valve, especially for an exhaust pipe manifold |
| JPH11294200A (en) * | 1998-04-07 | 1999-10-26 | Jidosha Kiki Co Ltd | Butterfly valve |
| CN101251049A (en) * | 2007-07-15 | 2008-08-27 | 李瑞强 | Exhaust brake capable of adjusting working pressure |
| CN201963407U (en) * | 2011-01-25 | 2011-09-07 | 浙江亿日气动科技有限公司 | Exhaust brake butterfly valve |
| CN202883128U (en) * | 2012-10-25 | 2013-04-17 | 浙江亿日气动科技有限公司 | Pressure limiting air leakage auxiliary braking valve device with piston tappet sleeve air hole |
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| Publication number | Publication date |
|---|---|
| CN102889139B (en) | 2015-12-30 |
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