CN102852653B - The reeded pressure limiting of driving shaft is lost heart auxiliary braking control valve unit - Google Patents
The reeded pressure limiting of driving shaft is lost heart auxiliary braking control valve unit Download PDFInfo
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- CN102852653B CN102852653B CN201210344590.0A CN201210344590A CN102852653B CN 102852653 B CN102852653 B CN 102852653B CN 201210344590 A CN201210344590 A CN 201210344590A CN 102852653 B CN102852653 B CN 102852653B
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Abstract
The present invention relates to the reeded pressure limiting of a kind of driving shaft to lose heart auxiliary braking control valve unit, comprise a valve body, valve body offers a fixed via; One tab (s), tab (s) is fixed in body cavity through fixed via by driving shaft; One support device; One regulator; One pressure relief opening device; The edge of tab (s) has a fixed gap, driving shaft offers one by the fixed groove in the center of circle and 2 milling limits through one end of fixed via, the width of fixed groove is greater than the thickness of tab (s) bottom fixed gap, distance in the middle of 2 milling limits is less than the width of fixed gap, and fixed gap is fixedly connected with tab (s) and driving shaft with rivet after inserting fixed groove.Compact structure of the present invention, the movement travel of effective control piston tappet; Improve exhaust back pressure value during low speed in motor; Resistance when guaranteeing bucket tappet to-and-fro motion is little, prevents inner spring Yin Gaowen and loses efficacy, making the longer service life of auxiliary braking control valve unit.
Description
Technical field
The present invention relates to a kind of complemental brake system, the reeded pressure limiting of driving shaft being specifically related to a kind of vehicle is lost heart auxiliary braking control valve unit.
Background technique
The pressure limiting auxiliary braking control valve unit that loses heart is a kind of complemental brake system of vehicle, be specially adapted to commerial vehicle, the frequency of utilization of the minimizing Service Brake of energy high degree, just can by wagon control within the scope of certain safe speed, prevention car brakeing is malfunctioning, guarantees traffic safety.
The pressure limiting of prior art is lost heart auxiliary braking control valve unit, that dependence cylinder or vacuum servo cylinder push-and-pull driving shaft deflect and tab (s) is deflected, driving shaft inserts after in tab (s) and fixes with rivet, the strength of driving shaft deflection acts on rivet, rivet bears very large oppressive force and is easily out of shape fracture, and tab (s) cannot realize its effective exercise.
China Patent No. 200710137250.X and 200810126049.6 discloses a kind of exhaust brake, which includes valve body, tab (s), strut, supporting sleeve, reduction valve, spring and adjusting screw, design is when pressure exceedes setting value, the pressure that timely release is unnecessary, ensure the stable of working pressure, but reduction valve is when regulating pressure to open, hot gas can be caused to surround spring, and very high temperature easily causes spring failure; And reduction valve, pressing plate and adjusting screw are all without navigation designing, combination is unstable, and pressing plate skew makes adjusting screw can not adjust 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, which includes valve body, tab (s), strut, supporting sleeve, controlling rod, spring and adjusting screw, design is when pressure exceedes setting value, the pressure that timely release is unnecessary, ensure 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 greatly easily forms clamping stagnation, and causes pressurized plane and valve body anti-other; Space residing for spring is not provided with regulator hole, cannot back pressure in discriminant space, accurately can not adjust pressure; And air pressure feedback channel is easily blocked by the impurity in hot gas, form 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 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, when engine exhaust enters the air-inlet cavity of valve body, a part of gas inevitably enters in the housing of regulator, causes obstruction to the to-and-fro motion of tappet, cannot Effective Regulation exhaust back pressure.Meanwhile, because the temperature of engine exhaust is very high, the structure closed causes regulator housing cavity 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 is seriously delayed, and sensitivity reduces greatly.Therefore, the pressure limiting of prior art is lost heart on auxiliary braking control valve unit and be there are some technical problems anxious to be resolved.
Summary of the invention
For above-mentioned defect, the object of this invention is to provide a kind of simple, efficient valve actuating device, to solve the technical problem of prior art.
For achieving the above object, present invention employs following technological scheme:
The reeded pressure limiting of a kind of driving shaft is lost heart auxiliary braking control valve unit, comprises a valve body, described valve body offers a fixed via; One tab (s), described tab (s) is fixed in body cavity through the fixed via of described valve body by driving shaft; One support device, described tab (s) is fixed in body cavity in conjunction with described driving shaft by described support device; One regulator, described regulator is arranged on described valve body, in order to regulate pressure; One pressure relief opening device, described pressure relief opening device is arranged in described tab (s), be connected in order to vented gasses with described regulator, the edge of described tab (s) has a fixed gap, described driving shaft offers one by the fixed groove in the center of circle and 2 milling limits through one end of described fixed via, the width of fixed groove is greater than the thickness of tab (s) bottom fixed gap, distance in the middle of 2 milling limits is less than the width of fixed gap, is fixedly connected with described tab (s) and described driving shaft after described fixed gap inserts described fixed groove with rivet.
To lose heart auxiliary braking control valve unit according to the reeded pressure limiting of the driving shaft described in the embodiment of the present invention, described valve body also offers a supported hole, and described supported hole is positioned on the valve body of described fixed via relative position, described supported hole and described fixed via concentric;
Described tab (s) relative to described fixed gap while offer a brace groove, described brace groove is a circular shape shape 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 tab (s).
To lose heart auxiliary braking control valve unit according to the reeded pressure limiting of the driving shaft described in the embodiment of the present invention, described regulator 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 has attacked internal thread away from one end of described supported hole, the internal diameter that described regulator housing attacks female one end is greater than the internal diameter that the other end does not have tapping thread, described regulator housing is attacked female place and is offered a tightening through hole, described regulator housing is being attacked internal thread and is not being had the position, boundary of tapping thread to offer tool withdrawal groove, at least one vent is offered in the radial direction of tool withdrawal groove,
One bucket tappet, described bucket tappet is a cylindrical body, and protrude out in described brace groove after described guide pin bushing is inserted by described regulator housing in one end of described bucket tappet, the external diameter of described bucket tappet is less than the internal diameter of described guide pin bushing;
One piston sleeve, described piston sleeve is a circular goblet, and described piston sleeve is placed in described regulator housing, the other end of described bucket tappet with at the bottom of the cup of described piston sleeve outside one side contact connection; One inner spring, described inner spring is placed in described regulator housing, one end of described inner spring with at the bottom of the cup of described piston sleeve inside one side contact connection;
One plug screw, described plug screw is a goblet, the other end of described inner spring with at the bottom of the cup of described plug screw inside one side contact connection, outside thread has been attacked in described plug screw one end at the bottom of cup, described plug screw and described regulator housing are spirally connected, and one 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 circular shape shape of the described brace groove of described tab (s), the first ladder is respectively by the outer genesis of described tab (s), second ladder and the 3rd ladder, the internal diameter of described first ladder is greater than the internal diameter of described second ladder, the internal diameter of described second ladder is greater than the internal diameter of described 3rd ladder, the internal diameter of described 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 first pressure relief opening is positioned on the cell wall of described brace groove of the side of the air-inlet cavity of described tab (s), be positioned at the place of described 3rd ladder, described second pressure relief opening is positioned on the cell wall of described brace groove of the side of the exhaust cavity of described tab (s), is positioned at the place of described first ladder, and the passage between described first pressure relief opening and described second pressure relief opening is in zigzag.
To lose heart auxiliary braking control valve unit according to the reeded pressure limiting of the driving shaft described in the embodiment of the present invention, described bucket tappet one end protruded out after inserting described guide pin bushing in described brace groove is a plane cone.
To lose heart auxiliary braking control valve unit according to the reeded pressure limiting of the driving shaft described in the embodiment of the present invention, the outer wall of the cup of described piston sleeve is circular arc, and the external diameter of described piston sleeve is less than the internal diameter that described regulator housing does not have tapping thread one end.
To lose heart auxiliary braking control valve unit according to the reeded pressure limiting of the driving shaft described in the embodiment of the present invention, described piston sleeve contacts wherein a kind of shape that the one side connected presents plane or groove with described bucket tappet.
To lose heart auxiliary braking control valve unit according to the reeded pressure limiting of the driving shaft described in the embodiment of the present invention, described plug screw cup bottom surface offers at least one vent.
To lose heart auxiliary braking control valve unit according to the reeded pressure limiting of the driving shaft described in the embodiment of the present invention, described first pressure relief opening and described second pressure relief opening are long strip through hole, and the two ends of described long strip through hole are circular arc.
Owing to have employed above technical characteristics, make the present invention compared to prior art, there is following advantage and good effect:
The first, driving shaft of the present invention makes tab (s) deflect with the contact force in face, and pressure limiting is lost heart the longer service life of auxiliary braking control valve unit;
The second, the present invention is simple and compact for structure, the position of effective control piston tappet and movement travel, reduces exhaust gas leakage, ensure that pressure limiting is lost heart the usability of auxiliary braking control valve unit;
Three, the present invention ensures the effective exercise of tab (s), and the fitted seal of tab (s) and regulator is good, improves exhaust back pressure value during low speed in motor;
Four, the vent offered of many places; ensure that pressure limiting is lost heart the unobstructed of regulator housing cavity in auxiliary braking control valve unit and air; resistance when guaranteeing bucket tappet to-and-fro motion is little; Effective Regulation engine exhaust back pressure 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, above whole technique effect might not be had simultaneously.
Accompanying drawing explanation
Fig. 1 is ancillary brake valve schematic diagram of the present invention;
Fig. 2 is valve body schematic top plan view of the present invention;
Fig. 3 is tab (s) schematic diagram of the present invention;
Fig. 4 is driving shaft schematic diagram of the present invention;
Fig. 5 is valve body cut-away diagram of the present invention;
Fig. 6 is tab (s) cut-away diagram of the present invention;
Fig. 7 is guide pin bushing schematic diagram of the present invention;
Fig. 8 is plug screw schematic diagram of the present invention;
Fig. 9 is bucket tappet schematic diagram of the present invention;
Figure 10 is piston sleeve schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, several preferred embodiment of the present invention is described in detail, but the present invention is not restricted to these embodiments.The present invention contain any make on marrow of the present invention and scope substitute, amendment, equivalent method and scheme.To have the present invention to make the public and understand thoroughly, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have the description of these details also can understand the present invention completely for a person skilled in the art.In addition, in order to avoid causing unnecessary obscuring to essence of the present invention, well-known method, process, flow process, element etc. are not described in detail.
Please refer to Fig. 1 ancillary brake valve schematic diagram of the present invention, ancillary brake valve forms primarily of cylinder 1, operating device 2 and the connected pressure limiting auxiliary braking control valve unit 3 that loses heart.Pressure limiting is lost heart auxiliary braking control valve unit 3, comprises valve body 31, tab (s) 32, support device, regulator 34 and a pressure relief opening device 35, please also refer to Fig. 2, described valve body 31 offers a fixed via 311, described tab (s) 32 is fixed in valve body 31 inner chamber through the fixed via 311 of described valve body 31 by driving shaft 21, described tab (s) 32 is fixed in valve body 31 inner chamber in conjunction with described driving shaft 21 by support device, described regulator 34 is arranged on described valve body 31, in order to regulate pressure, and described pressure relief opening device 35 is arranged in described tab (s) 32, be connected in order to vented gasses with described regulator 34, in addition, please also refer to Fig. 3 and Fig. 4, a fixed gap 321 is had in the edge of described tab (s) 32, described driving shaft 21 offers one by the fixed groove 211 in the center of circle and 2 milling limit (not shown) through one end of described fixed via 311, the width of described fixed groove 211 is greater than the thickness of tab (s) bottom fixed gap 321, distance in the middle of described 2 milling limits is less than the width of described fixed gap 321, described tab (s) 32 and described driving shaft 21 is fixedly connected with rivet after described fixed gap 321 inserts described fixed groove 211, thus, after described fixed gap 321 inserts described fixed groove 211, with the engaging of fixed groove 211 with fixed gap 321, also has the engaging of 2 milling limits and two paralleled inner faces of fixed gap 321, namely double card is closed and is added that rivet is fixedly connected with to support the connection campaign of described driving shaft 21 and described tab (s) 32, such combination is more firm.
In addition, please also refer to Fig. 3, Fig. 5, Fig. 6 and Fig. 7, described valve body 31 also offers a supported hole 312, described supported hole 312 is positioned on the valve body 31 of described fixed via 311 relative position, described supported hole 312 and described fixed via 311 concentric; And described tab (s) 32 relative to described fixed gap 321 while offer a brace groove 322, described brace groove 322 is a kind of circular shape shape grooves; 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 chamber, and corresponding inserted is in the brace groove 322 of described tab (s) 32.
In addition, please refer to Fig. 1, described regulator 34 comprises: a regulator housing 341, one bucket 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 the 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 attacked internal thread away from one end of described supported hole 312, the internal diameter that described regulator housing 341 attacks female one end is greater than the internal diameter that the other end does not have tapping thread, described regulator housing 341 is attacked female place and is offered a tightening through hole 347, described Cock screw 346 screws in the described tightening through hole 347 of described regulator housing 341, is stuck in tightly by described plug screw 345 in described regulator housing 341, described bucket tappet 342 is cylindrical bodys, and protrude out in described brace groove 322 after described guide pin bushing 33 is inserted by described regulator housing 341 in one end of described bucket tappet 342, the external diameter of described bucket 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 described regulator housing 341, the other end of described bucket tappet 342 with at the bottom of the cup of described piston sleeve 343 outside one side contact connection, in addition, described inner spring 344 is placed in described regulator housing 341, one end of described inner spring 344 with at the bottom of the cup of described piston sleeve 343 inside one side contact connection, the other end of described inner spring 344 with at the bottom of the cup of described plug screw 345 inside one side contact connection, in order to ensure that described plug screw 345 can not cause the torsion of described inner spring 344, high temperature grease can be coated on described plug screw 345 with the surface of contact of described inner spring 344, or ensure that the roughness of surface of contact is at below Ra3.2, in addition, described plug screw 345 is a round aecidioid body, outside thread has been attacked in one end at the bottom of close glass of described plug screw 345, described plug screw 345 is spirally connected with described regulator housing 341, one end of described plug screw 345 rim of a cup offers at least one breach 3451, in the present embodiment, the quantity of breach is 2 but can not be used for limiting this patent, described regulator housing 341 is being attacked internal thread and is not being had the position, boundary of tapping thread to offer tool withdrawal groove, at least one vent 3411 is offered in the radial direction of tool withdrawal groove, in the present embodiment, the quantity of vent 3411 is 2 but can not be used for limiting this patent.
In addition, please refer to Fig. 6, the described brace groove 322 of described tab (s) 32 is circular shape shape groove, the first ladder 3221, second ladder 3222 and the 3rd ladder 3223 is respectively by the outer genesis of described tab (s) 32, the internal diameter of described first ladder 3221 is greater than the internal diameter of described second ladder 3222, and the internal diameter of described second ladder 3222 is greater than the internal diameter of described 3rd ladder 3223; The internal diameter of described first ladder 3221 is greater than the external diameter of described guide pin bushing 33, the place of the first ladder 3221 described in the brace groove 322 that described guide pin bushing 33 is plugged in described tab (s) 32, when described tab (s) 32 rotates, the inwall of the first ladder 3221 is smooth-going on described guide pin bushing 33 trackslips; When described bucket tappet 342 pressurized moves back and forth, the end face of described bucket tappet 342 is movable between described second ladder 3222 and described guide pin bushing 33.
In addition, the circular shape shape groove of described brace groove 322, also can be designed to more than three ladders, such as, set up the 0th ladder in the first ladder extension, allows described guide pin bushing 33 be inserted in the place of described 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, and described first pressure relief opening 351 is positioned on the cell wall of the described brace groove 322 of the side of the air-inlet cavity of described tab (s) 32, is positioned at the place of described 3rd ladder 3223; Described second pressure relief opening 352 is positioned on the cell wall of the described brace groove 322 of the side of the exhaust cavity of described tab (s) 32, be positioned at the place of described first ladder 3221, passage between described first pressure relief opening 351 and described second pressure relief opening 352 is in zigzag, passage can not produce lateral force in a zigzag, and tab (s) more stability is better; When air pressure does not reach setting pressure, the end face of described bucket tappet 342 is at described second ladder 3222 place, when air pressure raises gradually, gas is exerted pressure to described bucket tappet 342 by described first pressure relief opening 351, the direction of described bucket tappet 342 towards described regulator housing 341 is moved, when the end face of described bucket tappet 342 moves to the place of described first ladder 3221, gas enters exhaust cavity by described second pressure relief opening 352, and the pressure of air-inlet cavity is releived.
In addition, please refer to Fig. 9, described bucket tappet 342 after inserting described guide pin bushing 33 one end protruded out in described brace groove 322 be a plane cone 3421, can reduce when described bucket tappet 342 moves and the frictional force of described guide pin bushing 33 and described brace groove 322, move more smooth and easy longer service life.
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 less than the internal diameter that described regulator housing 341 does not have tapping thread one end, when described piston sleeve 343 moves in described regulator housing 341, the skew of described piston sleeve 343 is caused via the gas penetrated between described bucket tappet 342 and described guide pin bushing 33, the outer wall of described piston sleeve 343 circular arc makes skew more smooth, also makes the gas penetrated flow more smoothly.
Also have, described piston sleeve 343 contacts wherein a kind of shape that the one side connected presents plane or groove with described bucket tappet 342, the present embodiment is used as example with the shape of groove, one side outside namely at the bottom of described piston sleeve 343 glasss is inwardly recessed, when gas causes the skew of described piston sleeve 343, described bucket tappet 342 and described piston sleeve 343 still can be stable connection, the performance of described regulator 34 can not be affected, described bucket tappet 342 contacts with described piston sleeve 343 one side connected can be designed to circular arc, during skew, described bucket tappet 342 contacts more stable with described piston sleeve 343.
In addition, please refer to Fig. 8, 345 glasss of bottom surfaces offer at least one vent 3452 to described plug screw, in the present embodiment, the quantity of vent 3452 is 2, but can not be used for limiting this patent, when tab (s) 32 is closed, when engine exhaust enters the air-inlet cavity of valve body 31, part gas inevitably enters in the housing of regulator 34, because the temperature of engine exhaust is very high, continuous high temperature can make inner spring 344 temperature distortion, even lost efficacy, make the braking action of ancillary brake valve delayed, sensitivity decrease, can the gas penetrated be discharged rapidly in air so offer vent 3452, the performance of described regulator 34 can not be affected.
Also have, described first pressure relief opening 351 and described second pressure relief opening 352 are long strip through hole, the two ends of described long strip through hole are circular arc, square design easily leaves stress and breach at corner, because the temperature of engine exhaust is very high, continuous high temperature can make square pressure relief opening produce slight crack, and reduce working life, the design of circular arc does not just have the misgivings of this respect.
In sum, owing to have employed above technical characteristics, the present invention is made to have following advantage and good effect compared to prior art:
The first, driving shaft of the present invention makes tab (s) deflect with the contact force in face, and pressure limiting is lost heart the longer service life of auxiliary braking control valve unit;
The second, the present invention is simple and compact for structure, the position of effective control piston tappet and movement travel, reduces exhaust gas leakage, ensure that pressure limiting is lost heart the usability of auxiliary braking control valve unit;
Three, the present invention ensures the effective exercise of tab (s), and the fitted seal of tab (s) and regulator is good, improves exhaust back pressure value during low speed in motor;
Four, the vent offered of many places; ensure that pressure limiting is lost heart the unobstructed of regulator housing cavity in auxiliary braking control valve unit and air; resistance when guaranteeing bucket tappet to-and-fro motion is little; Effective Regulation engine exhaust back pressure in time heat radiation, prevent inner spring Yin Gaowen and lost efficacy and allow longer service life.
Invention preferred embodiment just sets forth the present invention for helping.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the embodiment that this invention is only described yet.Obviously, according to the content of this specification, can make many modifications and variations.This specification is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technician can utilize the present invention well.The present invention is only subject to the restriction of claims and four corner and equivalent.It is only preferred embodiment of the present invention above; but be not used for limiting itself; anyly have the knack of those skilled in the art when without prejudice to spiritual connotation of the present invention, the equalization change done and changing, all should drop in protection scope of the present invention.
Claims (8)
1. the reeded pressure limiting of driving shaft is lost heart an auxiliary braking control valve unit, comprises a valve body, described valve body offers a fixed via, one tab (s), described tab (s) is fixed in body cavity through the fixed via of described valve body by driving shaft, one support device, described tab (s) is fixed in body cavity in conjunction with described driving shaft by described support device, one regulator, described regulator is arranged on described valve body, in order to regulate pressure, one pressure relief opening device, described pressure relief opening device is arranged in described tab (s), be connected in order to vented gasses with described regulator, it is characterized in that, the edge of described tab (s) has a fixed gap, described driving shaft offers one by the fixed groove in the center of circle and 2 milling limits through one end of described fixed via, the width of described fixed groove is greater than the thickness of tab (s) bottom fixed gap, distance in the middle of described 2 milling limits is less than the width of described fixed gap, described tab (s) and described driving shaft is fixedly connected with rivet after described fixed gap inserts described fixed groove,
Described tab (s) relative to described fixed gap while offer a brace groove, described brace groove is a circular shape shape groove; Described support device is a guide pin bushing,
The circular shape shape of the described brace groove of described tab (s), the first ladder, the second ladder and the 3rd ladder is respectively by the outer genesis of described tab (s), the internal diameter of described first ladder is greater than the internal diameter of described second ladder, the internal diameter of described second ladder is greater than the internal diameter of described 3rd ladder, the internal diameter of described 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 first pressure relief opening is positioned on the cell wall of described brace groove of the side of the air-inlet cavity of described tab (s), is positioned at the place of described 3rd ladder; Described second pressure relief opening is positioned on the cell wall of described brace groove of the side of the exhaust cavity of described tab (s), is positioned at the place of described first ladder, and the passage between described first pressure relief opening and described second pressure relief opening is in zigzag.
2. the reeded pressure limiting of driving shaft as claimed in claim 1 is lost heart auxiliary braking control valve unit, it is characterized in that, described valve body also offers a supported hole, and described supported hole is positioned on the valve body of described fixed via relative position, described supported hole and described fixed via concentric; 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 tab (s).
3. the reeded pressure limiting of driving shaft as claimed in claim 2 is lost heart auxiliary braking control valve unit, 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 has attacked internal thread away from one end of described supported hole, the internal diameter that described regulator housing attacks female one end is greater than the internal diameter that the other end does not have tapping thread, described regulator housing is attacked female place and is offered a tightening through hole, described regulator housing is being attacked internal thread and is not being had the position, boundary of tapping thread to offer tool withdrawal groove, at least one vent is offered in the radial direction of tool withdrawal groove, one bucket tappet, described bucket tappet is a cylindrical body, and protrude out in described brace groove after described guide pin bushing is inserted by described regulator housing in one end of described bucket tappet, the external diameter of described bucket tappet is less than the internal diameter of described guide pin bushing, one piston sleeve, described piston sleeve is a circular goblet, and described piston sleeve is placed in described regulator housing, the other end of described bucket tappet with at the bottom of the cup of described piston sleeve outside one side contact connection, one inner spring, described inner spring is placed in described regulator housing, one end of described inner spring with at the bottom of the cup of described piston sleeve inside one side contact connection, one plug screw, described plug screw is a goblet, the other end of described inner spring with at the bottom of the cup of described plug screw inside one side contact connection, outside thread has been attacked in described plug screw one end at the bottom of cup, described plug screw and described regulator housing are spirally connected, and one 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.
4. the reeded pressure limiting of driving shaft as claimed in claim 3 is lost heart auxiliary braking control valve unit, and it is characterized in that, described bucket tappet one end protruded out after inserting described guide pin bushing in described brace groove is a plane cone.
5. the reeded pressure limiting of driving shaft as claimed in claim 3 is lost heart auxiliary braking control valve unit, and it 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 less than the internal diameter that described regulator housing does not have tapping thread one end.
6. the reeded pressure limiting of driving shaft as claimed in claim 5 is lost heart auxiliary braking control valve unit, and it is characterized in that, described piston sleeve contacts wherein a kind of shape that the one side connected presents plane or groove with described bucket tappet.
7. the reeded pressure limiting of driving shaft as claimed in claim 6 is lost heart auxiliary braking control valve unit, it is characterized in that, described plug screw cup bottom surface offers at least one vent.
8. the reeded pressure limiting of driving shaft as claimed in claim 7 is lost heart auxiliary braking control valve unit, and it is characterized in that, described first pressure relief opening and described second pressure relief opening are 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 |
|---|---|---|---|
| CN201210344590.0A CN102852653B (en) | 2012-09-18 | 2012-09-18 | The reeded pressure limiting of driving shaft is lost heart auxiliary braking control valve unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210344590.0A CN102852653B (en) | 2012-09-18 | 2012-09-18 | The reeded pressure limiting of driving shaft is lost heart auxiliary braking control valve unit |
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| CN102852653A CN102852653A (en) | 2013-01-02 |
| CN102852653B true CN102852653B (en) | 2016-02-03 |
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| CN201210344590.0A Expired - Fee Related CN102852653B (en) | 2012-09-18 | 2012-09-18 | The reeded pressure limiting of driving shaft is lost heart auxiliary braking control valve unit |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08270465A (en) * | 1995-03-31 | 1996-10-15 | Nissan Diesel Motor Co Ltd | Exhaust brake device |
| JPH09144569A (en) * | 1995-11-28 | 1997-06-03 | Jidosha Kiki Co Ltd | Exhaust brake device |
| CN101251049A (en) * | 2007-07-15 | 2008-08-27 | 李瑞强 | Exhaust brake capable of adjusting working pressure |
| CN101251048A (en) * | 2007-07-15 | 2008-08-27 | 李瑞强 | Exhaust brake |
| CN201963407U (en) * | 2011-01-25 | 2011-09-07 | 浙江亿日气动科技有限公司 | Exhaust brake butterfly valve |
| CN202789133U (en) * | 2012-09-18 | 2013-03-13 | 浙江亿日气动科技有限公司 | Pressure-limiting gas relief auxiliary brake valve device with grooved driving shaft |
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2012
- 2012-09-18 CN CN201210344590.0A patent/CN102852653B/en not_active Expired - Fee Related
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| CN102852653A (en) | 2013-01-02 |
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Granted publication date: 20160203 Termination date: 20200918 |