CN102849057B - The pressure limiting having circular arc piston to overlap is lost heart and is assisted braking valve unit - Google Patents
The pressure limiting having circular arc piston to overlap is lost heart and is assisted braking valve unit Download PDFInfo
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- CN102849057B CN102849057B CN201210344522.4A CN201210344522A CN102849057B CN 102849057 B CN102849057 B CN 102849057B CN 201210344522 A CN201210344522 A CN 201210344522A CN 102849057 B CN102849057 B CN 102849057B
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Abstract
The present invention relates to the disappointing auxiliary braking valve unit of a kind of pressure limiting having circular arc piston to overlap, comprise a valve body, valve body has been offered a fixing through hole; One tab (s), tab (s) is fixed in body cavity through the fixing through hole of valve body by main drive shaft; One bracing or strutting arrangement; One pressure regulation device comprises a pressure regulation device case, a piston tappet, an inner spring, a plug screw; One pressure relief opening device, pressure regulation device also comprises a piston cover, piston cover is a circular goblet, piston cover is placed in pressure regulation device case, outside at the bottom of the cup of piston cover, one side contacts connection with piston tappet, inside at the bottom of the cup of piston cover, one side contacts connection with inner spring, and the outer wall of the cup body of piston cover is circular arc. The compact construction of the present invention, the movement travel of effective control piston tappet; Improve exhaust back pressure value during low speed in engine; Resistance when guaranteeing piston tappet to-and-fro movement is little, prevents inner spring to lose efficacy because of high temperature so that the longer service life of auxiliary braking valve unit.
Description
Technical field
The present invention relates to a kind of auxiliary drift stop, it is specifically related to the disappointing auxiliary braking valve unit of the pressure limiting having circular arc piston to overlap of a kind of vehicle.
Background technology
The pressure limiting auxiliary braking valve unit that loses heart is the auxiliary drift stop of one of vehicle, being specially adapted to commercial vehicle, the use frequency of the minimizing running brake of the very big degree of energy, just can by wagon control within the scope of certain safety speed, prevention vehicle brake failure, it is ensured that driving safety.
The pressure limiting of prior art is lost heart and is assisted braking valve unit, it is that dependence cylinder or vacuum power-assisted cylinder push-and-pull main drive shaft deflect and tab (s) is deflected, fix with rivet after in main drive shaft insertion tab (s), the strength of main drive shaft deflection acts on rivet, rivet bears very big 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 stopper, which includes valve body, tab (s), support bar, support set, reducing valve, spring and set screw, design is when pressure exceedes set(ting)value, the pressure that release is unnecessary in time, ensure the stable of operating pressure, but reducing valve is when regulating pressure to open, hot gas being caused to surround spring, very high temperature easily causes spring failure; And reducing valve, pressing plate and set screw are all without navigation designing, combination is unstable, and pressing plate skew makes set screw can not adjust suitable pressure; In addition, pressing plate and reducing valve easily rotate formed spring reverse cause spring fracture failure.
Also have, China Patent No. 200710137249.7 and 200810126050.9 discloses the exhaust stopper of a kind of adjustable working pressure, which includes valve body, tab (s), support bar, support set, control lever, spring and set screw, design is when pressure exceedes set(ting)value, the pressure that release is unnecessary in time, ensure the stable of operating pressure, but wherein control lever is subject to the pushing of air pressure transverse thrust, cause the deflection of control lever, it is stagnant that frictional force greatly easily forms card, and causes by pressing face and valve body anti-other; Space residing for spring is not provided with regulator hole, cannot back pressure in discriminant space, can not accurately adjust pressure; And, air pressure feedback channel is easily blocked by the impurity in hot gas, forms the situation that pressure regulation has some setbacks; In addition, pressing plate is unstable without the combination of navigation designing, pressing plate and spring, and pressing plate skew makes set screw can not adjust suitable pressure.
Plug screw on the pressure regulation device of prior art and the housing of pressure regulation device are full-closed structure. When tab (s) is closed, when engine exhaust enters the inlet chamber of valve body, in the housing entering pressure regulation device that part gas is inevitable, the to-and-fro movement of tappet is caused obstruction, cannot effectively regulate and control exhaust back pressure. Meanwhile, owing to the temperature of engine exhaust is very high, the structure closed causes pressure regulation device case inner chamber to dispel the heat, and continuous high temperature can make pressure limiting spring temperature distortion, even lost efficacy, and the braking effect of auxiliary brake valve is seriously delayed, and sensitivity reduces greatly. Therefore, the pressure limiting of prior art is lost heart and be there are some technical problems anxious to be resolved on auxiliary braking valve unit.
Summary of the invention
For above-mentioned defect, it is an object of the invention to provide a kind of valve executive device simple, efficient, to solve the technical problem of prior art.
For achieving the above object, present invention employs following technical scheme:
The pressure limiting having circular arc piston to overlap is lost heart and is assisted a braking valve unit, comprises a valve body, and described valve body has been offered a fixing through hole; One tab (s), described tab (s) is fixed in body cavity through the fixing through hole of described valve body by main drive shaft; One bracing or strutting arrangement, described tab (s) is fixed in body cavity in conjunction with described main drive shaft by described bracing or strutting arrangement; One pressure regulation device, described pressure regulation device is arranged on described valve body, and in order to regulate pressure, described pressure regulation device comprises a pressure regulation device case, a piston tappet, an inner spring, a plug screw; One pressure relief opening device, described pressure relief opening device is arranged in described tab (s), it is connected in order to vented gasses with described pressure regulation device, described pressure regulation device also comprises a piston cover, described piston cover is a circular goblet, and described piston cover is placed in described pressure regulation device case, and outside at the bottom of the cup of described piston cover, one side contacts connection with described piston tappet, inside at the bottom of the cup of described piston cover, one side contacts connection with described inner spring, and the outer wall of the cup body of described piston cover is circular arc.
Lose heart according to the pressure limiting having circular arc piston to overlap described in the embodiment of the present invention and assist braking valve unit, the edge of described tab (s) has a fixed gap, described main drive shaft offers a fixed groove by the center of circle and 2 milling limits through one end of described fixing through hole, 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, and described fixed gap is fixedly connected with described tab (s) and described main drive shaft with rivet after inserting described fixed groove.
Lose heart according to the pressure limiting having circular arc piston to overlap described in the embodiment of the present invention and assist braking valve unit, described valve body has also been offered a support hole, described support hole is positioned on the valve body of described fixing through hole relative position, and described support hole and described fixing through hole are concentric; Described tab (s) relative to described fixed gap while offered a brace groove, described brace groove is a circular shape shape groove; Described bracing or strutting arrangement is a guide pin bushing, and described guide pin bushing is a cylinder body, and described guide pin bushing is fixed in the support 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).
Lose heart according to the pressure limiting having circular arc piston to overlap described in the embodiment of the present invention and assist braking valve unit, described pressure regulation device case is arranged on the outer wall in described support hole of described valve body, described pressure regulation device case is a cylinder body, described pressure regulation device case is concentric with described support hole, the internal diameter of described pressure regulation device case is greater than the internal diameter in described support hole, described pressure regulation device case is attacked away from the one end in described support hole and is provided with internal thread, the internal diameter that described pressure regulation device case attacks the one end being provided with internal thread is greater than the other end and does not attack the internal diameter establishing internal thread, described pressure regulation device case is attacked the place being provided with internal thread and has been offered a tightening through hole, described pressure regulation device case is being attacked internal thread and is not being had the position, boundary of tapping thread to offer relief groove, radial direction at relief groove has offered at least one ventilating pit, described piston tappet is a right cylinder, and one end of described piston tappet protrudes out in described brace groove after inserting described guide pin bushing by described pressure regulation device case, and the external diameter of described piston tappet is less than the internal diameter of described guide pin bushing, described inner spring is placed in described pressure regulation device case, and inside at the bottom of the cup that one end of described inner spring is overlapped with described piston, one side contacts connection, 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, described plug screw one end at the bottom of cup is attacked and is provided with outside screw, and described plug screw and described pressure regulation device case spiral shell connect, and at least one breach has been offered in one end of described plug screw cup mouth, described pressure regulation device also comprises a tightening screw, described tightening screw screws in the described tightening through hole of described pressure regulation device case, in addition, the circular shape shape of the described brace groove of described tab (s), it is respectively the first ladder by the outer genesis of described tab (s), second-order ladder and the 3rd ladder, the internal diameter of described first ladder is greater than the internal diameter of described second-order ladder, the internal diameter of described second-order 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 2nd pressure relief opening, described first pressure relief opening is positioned on the cell wall of the described brace groove of the side of the inlet chamber of described tab (s), it is positioned at the place of described 3rd ladder, described 2nd pressure relief opening is positioned on the cell wall of the described brace groove of the side of the discharge chamber of described tab (s), is positioned at the place of described first ladder, and the passage between described first pressure relief opening and described 2nd pressure relief opening is in a zigzag.
Losing heart according to the pressure limiting having circular arc piston to overlap described in the embodiment of the present invention and assist braking valve unit, described piston cover contacts wherein a kind of shape that the one side connected presents plane or groove with described piston tappet.
Lose heart according to the pressure limiting having circular arc piston to overlap described in the embodiment of the present invention and assist braking valve unit, at least one ventilating pit has been offered in described plug screw cup bottom surface.
Losing heart according to the pressure limiting having circular arc piston to overlap described in the embodiment of the present invention and assist braking valve unit, described first pressure relief opening and described 2nd pressure relief opening are long strip shape through hole, and the two ends of described long strip shape through hole are circular arc.
Owing to have employed above technology feature so that the present invention, compared to prior art, has following advantage and positively effect:
The first, the main drive shaft of the present invention makes tab (s) deflect with the contact force in face so that pressure limiting is lost heart the longer service life of auxiliary braking valve unit;
Two, present configuration is simply compact, the position of effective control piston tappet and movement travel, reduces exhaust gas leakage, it is ensured that pressure limiting is lost heart the use properties of auxiliary braking valve unit;
Three, the present invention ensures the effective exercise of tab (s), and the fitted seal of tab (s) and pressure regulation device is good, it is to increase exhaust back pressure value during low speed in engine;
Four, the ventilating pit that many places are offered; ensure that the unobstructed of the pressure regulation device case inner chamber that pressure limiting is lost heart in auxiliary braking valve unit and air; resistance when guaranteeing piston tappet to-and-fro movement is little; effectively regulation and control engine exhaust back pressure also dispels the heat in time, prevents inner spring to lose efficacy because of high temperature and allows longer service life.
Certainly, implement any one specific embodiment of content of the present invention, might not have above whole technique effect simultaneously.
Accompanying drawing explanation
Fig. 1 is the auxiliary brake valve schematic diagram of the present invention;
Fig. 2 is the valve body schematic top plan view of the present invention;
Fig. 3 is the tab (s) schematic diagram of the present invention;
Fig. 4 is the main drive shaft schematic diagram of the present invention;
Fig. 5 is the valve body cut-away diagram of the present invention;
Fig. 6 is the tab (s) cut-away diagram of the present invention;
Fig. 7 is the guide pin bushing schematic diagram of the present invention;
Fig. 8 is the plug screw schematic diagram of the present invention;
Fig. 9 is the piston tappet schematic diagram of the present invention;
Figure 10 is the piston cover schematic 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. Replacement, amendment, equivalent method and the scheme made are contained in any marrow in the present invention and scope in the present invention. In order to make the public the present invention had and understand thoroughly, the following preferred embodiment of the present invention specifically understands concrete details, and the description not having these details for a person skilled in the art can also understand the present invention completely. In addition, in order to avoid the essence to the present invention to cause unnecessary obscuring, well-known method, process, flow process, element etc. it are not described in detail.
Please refer to the auxiliary brake valve schematic diagram of Fig. 1 the present invention, auxiliary brake valve loses heart primarily of cylinder 1, operating mechanism 2 and connected pressure limiting and assists braking valve unit 3 to form. pressure limiting is lost heart and is assisted braking valve unit 3, comprises valve body 31, tab (s) 32, bracing or strutting arrangement, pressure regulation device 34 and a pressure relief opening device 35, please also refer to Fig. 2, and described valve body 31 has been offered a fixing through hole 311, described tab (s) 32 is fixed in valve body 31 inner chamber through the fixing through hole 311 of described valve body 31 by main drive shaft 21, described tab (s) 32 is fixed in valve body 31 inner chamber in conjunction with described main drive shaft 21 by bracing or strutting arrangement, described pressure regulation device 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, it is connected in order to vented gasses with described pressure regulation device 34, in addition, please also refer to Fig. 3 and Fig. 4, edge in described tab (s) 32 has a fixed gap 321, described main drive shaft 21 offers a fixed groove 211 by the center of circle and 2 milling limit (not shown) through one end of described fixing through hole 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 fixed gap 321 is fixedly connected with described tab (s) 32 and described main drive shaft 21 with rivet after inserting described fixed groove 211, thus, after described fixed gap 321 inserts described fixed groove 211, it is close with the card of fixed groove 211 with fixed gap 321, the card of two paralleled inner faces of 2 milling limits and fixed gap 321 is also had to close, also it is exactly that double card conjunction adds that rivet is fixedly connected with the connection campaign supporting described main drive 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 has also been offered a support hole 312, described support hole 312 is positioned on the valve body 31 of described fixing through hole 311 relative position, and described support hole 312 and described fixing through hole 311 are concentric; And described tab (s) 32 relative to described fixed gap 321 while offered a brace groove 322, described brace groove 322 is a kind of circular shape shape groove; Described bracing or strutting arrangement is the guide pin bushing 33 of a cylinder body in the present embodiment, and described guide pin bushing 33 is fixed in the support 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 pressure regulation device 34 comprises: a pressure regulation device case 341, one piston tappet 342, one piston cover 343, one inner spring 344, one plug screw 345 and a tightening screw 346, described pressure regulation device case 341 is arranged on the outer wall in described support hole 312 of described valve body 31, described pressure regulation device case 341 and what described valve body 31 was made of one piece in the present embodiment, described pressure regulation device case 341 is a cylinder body, described pressure regulation device case 341 is concentric with described support hole 312, the internal diameter of described pressure regulation device case 341 is greater than the internal diameter in described support hole 312, described pressure regulation device case 341 has attacked internal thread away from the one end in described support hole 312, the internal diameter that described pressure regulation device case 341 attacks one end of internal thread is greater than the internal diameter that the other end does not have tapping thread, a tightening through hole 347 has been offered in the place that described pressure regulation device case 341 attacks internal thread, described tightening screw 346 screws in the described tightening through hole 347 of described pressure regulation device case 341, tightly is stuck in described pressure regulation device case 341 by described plug screw 345, described piston tappet 342 is a right cylinder, and one end of described piston tappet 342 protrudes out in described brace groove 322 after inserting described guide pin bushing 33 by described pressure regulation device case 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 cover 343 to be a circular goblet be placed in described pressure regulation device case 341, the other end of described piston tappet 342 with at the bottom of the cup of described piston cover 343 outside simultaneously contact connection, in addition, described inner spring 344 is placed in described pressure regulation device case 341, one end of described inner spring 344 and described piston overlap one side inside at the bottom of the cup of 343 and 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 fat can be coated on described plug screw 345 with the contact surface of described inner spring 344, or ensure that the roughness of contact surface is at below Ra3.2, in addition, described plug screw 345 is a round aecidioid body, outside screw has been attacked in one end at the bottom of close glass of described plug screw 345, described plug screw 345 connects with described pressure regulation device case 341 spiral shell, at least one breach 3451 has been offered in one end of described plug screw 345 glasss of mouths, in the present embodiment the quantity of breach be 2 but can not be used for restriction this patent, described pressure regulation device case 341 is being attacked internal thread and is not being had the position, boundary of tapping thread to offer relief groove, radial direction at relief groove has offered at least one ventilating pit 3411, in the present embodiment the quantity of ventilating pit 3411 be 2 but can not be used for restriction this patent.
In addition, please refer to Fig. 6, the described brace groove 322 of described tab (s) 32 is circular shape shape groove, it is respectively the first ladder 3221, second-order ladder 3222 and the 3rd ladder 3223 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-order ladder 3222, and the internal diameter of described second-order 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, described guide pin bushing 33 is plugged in the place of the first ladder 3221 described in the brace groove 322 of described tab (s) 32, and 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 piston tappet 342 moves back and forth by pressure, the end face of described piston tappet 342 is movable between described second-order ladder 3222 and described guide pin bushing 33.
In addition, the circular shape shape groove of described brace groove 322, it is also possible to be designed to more than three 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 2nd 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 inlet chamber of described tab (s) 32, is positioned at the place of described 3rd ladder 3223; Described 2nd pressure relief opening 352 is positioned on the cell wall of the described brace groove 322 of the side of the discharge chamber of described tab (s) 32, it is positioned at the place of described first ladder 3221, passage between described first pressure relief opening 351 and described 2nd pressure relief opening 352 is in a zigzag, passage can not produce side force in a zigzag, and more stability is better for tab (s); When air pressure does not reach setting pressure, the end face of described piston tappet 342 is at described second-order ladder 3222 places, when air pressure raises gradually, gas is exerted pressure to described piston tappet 342 by described first pressure relief opening 351, the direction of described piston tappet 342 towards described pressure regulation device case 341 is moved, when the end face of described piston tappet 342 moves to the place of described first ladder 3221, gas enters discharge chamber by described 2nd pressure relief opening 352, and the pressure of inlet chamber is releived.
In addition, please refer to Fig. 9, one end that described piston tappet 342 protrudes out in described brace groove 322 after inserting described guide pin bushing 33 is a plane taper body 3421, can reduce when described piston 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 body of described piston cover 343 is circular arc, the external diameter of described piston cover 343 is less than the internal diameter that described pressure regulation device case 341 does not have tapping thread one end, when described piston cover 343 moves in described pressure regulation device case 341, the skew of described piston cover 343 is caused via the gas penetrated between described piston tappet 342 and described guide pin bushing 33, the outer wall that described piston overlaps 343 circular arcs makes skew more smooth, and the gas also making to penetrate flows more smoothly.
Also have, described piston cover 343 contacts wherein a kind of shape that the one side connected presents plane or groove with described piston tappet 342, the present embodiment is used as example with the shape of groove, also it is exactly that described piston overlaps the one side outside at the bottom of 343 glasss and is inwardly recessed, when gas causes the skew of described piston cover 343, described piston tappet 342 and described piston cover 343 still can be stable connection, the performance of described pressure regulation device 34 can not be affected, described piston tappet 342 overlaps 343 one sides contacting connection with described piston can be designed to circular arc, during skew, described piston tappet 342 contacts more stable with described piston cover 343.
In addition, please refer to Fig. 8, described plug screw has offered at least one ventilating pit 3452 on 345 glasss of bottom surfaces, in the present embodiment, the quantity of ventilating pit 3452 is 2, but restriction this patent can not be used for, when tab (s) 32 is closed, when engine exhaust enters the inlet chamber of valve body 31, in the housing entering pressure regulation device 34 that part gas is inevitable, owing to the temperature of engine exhaust is very high, continuous high temperature can make inner spring 344 temperature distortion, even lost efficacy, make the braking effect of auxiliary brake valve delayed, sensitivity decrease, can the gas that penetrate be discharged rapidly in air so offering ventilating pit 3452, the performance of described pressure regulation device 34 can not be affected.
Also have, described first pressure relief opening 351 and described 2nd pressure relief opening 352 are long strip shape through hole, the two ends of described long strip shape through hole are circular arc, square design easily leaves stress and breach at corner, owing to the temperature of engine exhaust is very high, continuous high temperature can make square pressure relief opening produce slight crack, reduces work-ing life, and the design of circular arc does not just have the misgivings of this respect.
In sum, owing to have employed above technology feature so that the present invention has following advantage and positively effect compared to prior art:
The first, the main drive shaft of the present invention makes tab (s) deflect with the contact force in face so that pressure limiting is lost heart the longer service life of auxiliary braking valve unit;
Two, present configuration is simply compact, the position of effective control piston tappet and movement travel, reduces exhaust gas leakage, it is ensured that pressure limiting is lost heart the use properties of auxiliary braking valve unit;
Three, the present invention ensures the effective exercise of tab (s), and the fitted seal of tab (s) and pressure regulation device is good, it is to increase exhaust back pressure value during low speed in engine;
Four, the ventilating pit that many places are offered; ensure that the unobstructed of the pressure regulation device case inner chamber that pressure limiting is lost heart in auxiliary braking valve unit and air; resistance when guaranteeing piston tappet to-and-fro movement is little; effectively regulation and control engine exhaust back pressure also dispels the heat in time, prevents inner spring to lose efficacy because of high temperature and allows longer service life.
Invention preferred embodiment just sets forth the present invention for helping. The preferred embodiment details that detailed descriptionthe is not all, does not limit the embodiment that this invention is only described yet. Obviously, according to the content of this specification sheets, can make many modifications and variations. This specification sheets is chosen and is specifically described these embodiments, is the principle in order to explain the present invention better and practical application, thus makes art technician can utilize the present invention well. The present invention is only by the restriction of right claim and whole scope and equivalent. It it is only the better embodiment of the present invention disclosed in above; but not it is used for limiting itself; any technician haveing the knack of this area is not when running counter to spiritual connotation of the present invention, and the impartial change done and changing, all should drop in protection scope of the present invention.
Claims (7)
1. the pressure limiting having circular arc piston to overlap is lost heart and is assisted a braking valve unit, comprises a valve body, and described valve body has been offered a fixing through hole; One tab (s), described tab (s) is fixed in body cavity through the fixing through hole of described valve body by main drive shaft; One bracing or strutting arrangement, described tab (s) is fixed in body cavity in conjunction with described main drive shaft by described bracing or strutting arrangement; One pressure regulation device, described pressure regulation device is arranged on described valve body, and in order to regulate pressure, described pressure regulation device comprises a pressure regulation device case, a piston tappet, an inner spring, a plug screw; One pressure relief opening device, described pressure relief opening device is arranged in described tab (s), it is connected in order to vented gasses with described pressure regulation device, it is characterized in that, described pressure regulation device also comprises a piston cover, and described piston cover is a circular goblet, described piston cover is placed in described pressure regulation device case, outside at the bottom of the cup of described piston cover, one side contacts connection with described piston tappet, and inside at the bottom of the cup of described piston cover, one side contacts connection with described inner spring, and the outer wall of the cup body of described piston cover is circular arc;
The edge of described tab (s) has a fixed gap, described tab (s) relative to described fixed gap while offered a brace groove, described brace groove is a circular shape shape groove, the circular shape shape of described brace groove, it is respectively the first ladder by the outer genesis of described tab (s), second-order ladder and the 3rd ladder, the internal diameter of described first ladder is greater than the internal diameter of described second-order ladder, the internal diameter of described second-order ladder is greater than the internal diameter of described 3rd ladder, described pressure relief opening device comprises: the first pressure relief opening and the 2nd pressure relief opening, described first pressure relief opening is positioned on the cell wall of the described brace groove of the side of the inlet chamber of described tab (s), it is positioned at the place of described 3rd ladder, described 2nd pressure relief opening is positioned on the cell wall of the described brace groove of the side of the discharge chamber of described tab (s), is positioned at the place of described first ladder, and the passage between described first pressure relief opening and described 2nd pressure relief opening is in a zigzag.
2. the pressure limiting having circular arc piston to overlap as claimed in claim 1 is lost heart and is assisted braking valve unit, it is characterized in that, described main drive shaft offers a fixed groove by the center of circle and 2 milling limits through one end of described fixing through hole, 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, and described fixed gap is fixedly connected with described tab (s) and described main drive shaft with rivet after inserting described fixed groove.
3. the pressure limiting having circular arc piston to overlap as claimed in claim 2 is lost heart and is assisted braking valve unit, it is characterized in that, also having offered a support hole on described valve body, described support hole is positioned on the valve body of described fixing through hole relative position, and described support hole and described fixing through hole are concentric; Described bracing or strutting arrangement is a guide pin bushing, and described guide pin bushing is a cylinder body, and described guide pin bushing is fixed in the support 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).
4. the pressure limiting having circular arc piston to overlap as claimed in claim 3 is lost heart and is assisted braking valve unit, it is characterized in that, described pressure regulation device case is arranged on the outer wall in described support hole of described valve body, described pressure regulation device case is a cylinder body, described pressure regulation device case is concentric with described support hole, the internal diameter of described pressure regulation device case is greater than the internal diameter in described support hole, described pressure regulation device case is attacked away from the one end in described support hole and is provided with internal thread, the internal diameter that described pressure regulation device case attacks the one end being provided with internal thread is greater than the other end and does not attack the internal diameter establishing internal thread, described pressure regulation device case is attacked the place being provided with internal thread and has been offered a tightening through hole, described pressure regulation device case is being attacked internal thread and is not being had the position, boundary of tapping thread to offer relief groove, radial direction at relief groove has offered at least one ventilating pit, described piston tappet is a right cylinder, and one end of described piston tappet protrudes out in described brace groove after inserting described guide pin bushing by described pressure regulation device case, and the external diameter of described piston tappet is less than the internal diameter of described guide pin bushing, described inner spring is placed in described pressure regulation device case, and inside at the bottom of the cup that one end of described inner spring is overlapped with described piston, one side contacts connection, 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, described plug screw one end at the bottom of cup is attacked and is provided with outside screw, and described plug screw and described pressure regulation device case spiral shell connect, and at least one breach has been offered in one end of described plug screw cup mouth, described pressure regulation device also comprises a tightening screw, and described tightening screw screws in the described tightening through hole of described pressure regulation device case.
5. the pressure limiting having circular arc piston to overlap as claimed in claim 4 is lost heart and is assisted braking valve unit, it is characterised in that, described piston cover contacts wherein a kind of shape that the one side connected presents plane or groove with described piston tappet.
6. the pressure limiting having circular arc piston to overlap as claimed in claim 5 is lost heart and is assisted braking valve unit, it is characterised in that, at least one ventilating pit has been offered in described plug screw cup bottom surface.
7. the pressure limiting having circular arc piston to overlap as claimed in claim 6 is lost heart and is assisted braking valve unit, it is characterised in that, described first pressure relief opening and described 2nd pressure relief opening are long strip shape through hole, and the two ends of described long strip shape through hole are circular arc.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210344522.4A CN102849057B (en) | 2012-09-18 | 2012-09-18 | The pressure limiting having circular arc piston to overlap is lost heart and is assisted braking valve unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210344522.4A CN102849057B (en) | 2012-09-18 | 2012-09-18 | The pressure limiting having circular arc piston to overlap is lost heart and is assisted braking valve unit |
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| CN102849057A CN102849057A (en) | 2013-01-02 |
| CN102849057B true CN102849057B (en) | 2016-06-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415510A (en) * | 2001-11-01 | 2003-05-07 | 现代自动车株式会社 | Automotive auxiliary brake |
| CN101103190A (en) * | 2004-11-22 | 2008-01-09 | 雅各布斯车辆系统公司 | Apparatus and method for controlling exhaust pressure |
| CN102182563A (en) * | 2011-01-25 | 2011-09-14 | 浙江亿日气动科技有限公司 | Pressure limiting seal piston and exhaust brake butterfly valve thereof |
| CN102182564A (en) * | 2011-01-25 | 2011-09-14 | 浙江亿日气动科技有限公司 | Butterfly sheet of exhausting brake butterfly valve and exhausting brake butterfly valve |
| CN202789135U (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 circular arc-shaped piston sleeve |
-
2012
- 2012-09-18 CN CN201210344522.4A patent/CN102849057B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415510A (en) * | 2001-11-01 | 2003-05-07 | 现代自动车株式会社 | Automotive auxiliary brake |
| CN101103190A (en) * | 2004-11-22 | 2008-01-09 | 雅各布斯车辆系统公司 | Apparatus and method for controlling exhaust pressure |
| CN102182563A (en) * | 2011-01-25 | 2011-09-14 | 浙江亿日气动科技有限公司 | Pressure limiting seal piston and exhaust brake butterfly valve thereof |
| CN102182564A (en) * | 2011-01-25 | 2011-09-14 | 浙江亿日气动科技有限公司 | Butterfly sheet of exhausting brake butterfly valve and exhausting brake butterfly valve |
| CN202789135U (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 circular arc-shaped piston sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102849057A (en) | 2013-01-02 |
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