CN104192130B - Two grades, the three grades of cadence braking master valves that north benz band slows down - Google Patents
Two grades, the three grades of cadence braking master valves that north benz band slows down Download PDFInfo
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- CN104192130B CN104192130B CN201410485293.7A CN201410485293A CN104192130B CN 104192130 B CN104192130 B CN 104192130B CN 201410485293 A CN201410485293 A CN 201410485293A CN 104192130 B CN104192130 B CN 104192130B
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Abstract
Two grades, the three grades of cadence braking master valves that a kind of north benz band slows down, the spring bag card of its internal secondary points stops dummy piston and three grades of points are stopped dummy piston assembly, use upper, annular in-flanges, the structure of lower annular flanging, simplify the structure of spring bag card, reduce difficulty of processing and assembly difficulty, it is possible to the significantly qualification rate of improving product.Spring bag card can pass through machining straight forming, it is also possible to carries out one-time formed processing by Sheet Metal Forming Technology, and the course of processing is simple, many that spring installation spring bag card within simultaneously is the simplest.
Description
Technical field
The invention mainly relates to the technical field of the parts of brake valve of car, two grades, the three grades of cadence braking master valves that a kind of north benz band slows down.
Background technology
The brake system of truck of the prior art and heavy goods vehicles is too anxious, and the bad control of feel easily causes brake block and heats up rapidly, causes carbonization, directly influencing braking effect, it is too urgent to brake, and also can cause sliding inclined, affect stability in the large, thus produce insecurity, or unnecessary economic loss.Problem during in order to solve these brakes of truck, two-stage cadence braking master valve that our unit successively proposes and the patent of three grades of dummy piston assemblies, it is possible to output " two grades or three grades of points stop "." point is stopped " principle can make compressed air, forms pulse in controlling pipeline and air chamber, is applied to brake block, and every subpulse is all equivalent to brake block of instrument wiping.It is not only able to accomplish that brake hubs is combined effectively with brake block, and largely further improves brake block carbonization or form adamantine layer, thus avoid the phenomenon of poor stop to occur, reach good braking effect.Critical component in above-mentioned two patent is spring bag card, and owing to spring bag card shape matching is special, processing technique is complicated, and yield rate is the highest, additionally there are the problem that mounting process is complicated, has a great impact the quality of whole main brake valve.
Summary of the invention
In order to solve the problems referred to above, the present invention proposes two grades, the three grades of cadence braking master valves that a kind of north benz band slows down.
The technical scheme is that the two-stage cadence braking master valve that a kind of north benz band slows down, including the upper valve body being bolted together, middle valve body, lower valve body,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step,
Being provided with secondary points in this dummy piston chamber to stop dummy piston assembly, including dummy piston body, spring bag card, tip-lever support, the top of dummy piston body is columnar width dish chamber, and the cavity shape projection that the bottom of dummy piston body is stretched out is body of rod chamber；The top of described tip-lever support is width dish, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, it is followed successively by first body of rod, second body of rod, the 3rd body of rod from top to down, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, in the width dish chamber that width dish is arranged in dummy piston body by jump ring；Described spring Bao Kawei is columnar structured, and between the step body of rod and the inwall of dummy piston body width dish chamber of tip-lever support, the upper end of spring bag card is provided with inside annular upper overturning, and lower end is provided with flange under outside annular；Spring bag card outer cover is equipped with one-level balancing spring, and one-level balancing spring is supported under the lower surface of tip-lever support width dish and spring bag card annular between flange upper surface；It is provided with two grades of balancing springs between spring bag card inwall and the step body of rod, the lower end of two grades of balancing springs is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of two grades of balancing springs is more than upper overturning internal diameter, upper overturning internal diameter is more than or equal to the diameter of first body of rod, and the internal diameter of the upper end of two grades of balancing springs is less than the diameter of first body of rod；Two grades of balancing spring upper ends are L1 to the distance of the step surface of the first body of rod lower end, the step surface of the second body of rod lower end is L2 to the distance of body of rod chamber upper surface, distance between upper surface and the width dish lower surface of described spring bag card is L4, L1 ＜ L2 ＜ L4；The inside of tip-lever support is provided with push rod chamber,
The top of described dummy piston body is provided with the edge turned up, and is provided with back-moving spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge；The outer surface of dummy piston body is the face of being slidably matched with the lower inner surface of the step dummy piston chamber in upper valve body, and the bottom of the outer surface of described dummy piston body is provided with cannelure, is provided with sealing ring in this cannelure；Spacing back-up ring and jump ring, the spacing back-up ring gear outer edge in the upper end of dummy piston body it is provided with in the upper edge of dummy piston chamber；
The bottom of described upper valve body is upper valve member cavity, it is provided with interlayer between the outside and upper valve body housing of upper valve member cavity, the top of upper interlayer is through with dummy piston chamber, upper valve member cavity sidepiece is provided with the enterprising QI KOU protruding horizontally up upper valve body housing, and the sidepiece of upper valve body is additionally provided with the upper gas outlet protruding horizontally up and communicating with upper interlayer；The upper valve hole that inside flange is formed it is provided with on the top of upper valve member cavity, on this, valve hole is corresponding with the external end head position of the body of rod chamber that the bottom of described dummy piston body is stretched out, and on this, valve bore dia is more than the diameter of the external end head of body of rod chamber, is provided with valve member in upper valve member inside cavity；
Upper valve member includes upper valve and the upper valve seat of annular of tubular, and upper valve seat is sleeved on outside valve, for the face of being slidably matched between inwall and the outer wall of upper valve of upper valve seat, and is provided with sealing structure；Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring；For the face of being slidably matched between outer wall and the inwall of upper valve member cavity of upper valve seat, and it is provided with sealing structure；The upper end of described upper valve is annular disk body, forms in-flanges and flanging at upper valve end respectively, be provided with valve spring between this flanging lower surface and upper surface of upper valve seat inside and outside this annular disk body；The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms valve opening and closing structure with the edge in valve hole, and the annular protrusion of inner side forms valve venting on-off structure with the outer face of the body of rod chamber of dummy piston body bottom；
Middle valve body include upper end be connected shell and inner core, and the interlayer that bottom is uncovered between shell and inner core, it is provided with relay piston inside the inner core of middle valve body, vertical hollow rod body that relay piston includes center and the stepped piston body being connected to around the body of rod, stepped piston body includes upper piston and lower piston, lower piston is more than upper piston, for the face of being slidably matched between upper piston and the interior tube inner surface of middle valve body, the interlayer of middle valve body forms slow chamber with the upper surface of lower piston, sidewall at middle valve body is provided with the slow interface connected with interlayer, the upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston body from the middle part of upper valve；
The top of lower valve body housing is the lower piston chamber that the lower piston with dummy piston body is mated, and lower piston is the face of being slidably matched with the inwall of this lower piston chamber；
The bottom of lower valve body is lower valve assembly cavity, it is provided with lower interlayer between the outside of lower valve assembly cavity and lower valve body housing, the top of lower interlayer is through with lower piston chamber, lower valve assembly cavity sidepiece is provided with the lower air inlet protruding horizontally up lower valve body, and the sidepiece of lower valve body is additionally provided with the lower gas outlet protruding horizontally up and communicating with lower interlayer；The lower valve hole that inside flange is formed it is provided with on the top of lower valve assembly cavity, this lower valve hole is corresponding with the hollow rod body lower end position of described relay piston, and this lower valve bore dia is more than the diameter of the hollow rod body lower end of relay piston, is provided with lower valve assembly in lower valve assembly inside cavity；
Lower valve assembly includes lower valve and the lower valve seat of annular of tubular, and lower valve cover for seat is contained in outside lower valve, for the face of being slidably matched between inwall and the outer wall of lower valve of lower valve seat, and is provided with sealing structure；For the face of being slidably matched between outer wall and the inwall of lower valve assembly cavity of lower valve seat, and it is provided with sealing structure；The upper end of described lower valve is annular disk body, forms in-flanges and flanging respectively in lower valve end, be provided with lower valve spring between this flanging lower surface and upper surface of lower valve seat inside and outside this annular disk body；The upper surface of the annular disk body of lower valve upper end is provided with lower valve sealing gasket, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms lower valve on-off structure with the edge in lower valve hole, and the annular protrusion of inner side forms lower valve venting on-off structure with the hollow rod body lower end of relay piston；
It is provided with exhaust nozzle chamber at lower valve body, and it being installed with exhaust nozzle by jump ring, this exhaust nozzle includes urceolus and inner core, and the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on inside lower valve, for the face of being slidably matched between outer wall and the inwall of lower valve of inner core.
The external diameter of two grades of described balancing springs mates with the internal diameter of spring bag card, the internal diameter of two grades of described balancing springs and the diameter matches of second body of rod；The internal diameter of described one-level balancing spring mates with the external diameter of spring bag card.
Described width dish lower surface is provided with annular groove outside first body of rod；This annular groove width mates with the width of the upper end of spring bag card.
Periphery, described tip-lever support upper end is set with the dirt-proof boot of annular, and this dirt-proof boot covers the annular region between tip-lever support upper end and upper valve body upper end.
The lower end of described exhaust nozzle is provided with dust-proof cushion.
Three grades of cadence braking master valves that a kind of north benz band slows down, including the upper valve body being bolted together, middle valve body, lower valve body,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step, is provided with three grades of points and stops dummy piston assembly in dummy piston chamber,
These three grades of points are stopped dummy piston assembly, including dummy piston body, spring bag card, tip-lever support,
The top of dummy piston body is columnar width dish chamber, and the cavity shape projection that the bottom of dummy piston body is stretched out is body of rod chamber；
The top of described tip-lever support is width dish, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, it is followed successively by first body of rod, second body of rod, the 3rd body of rod from top to down, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, in the width dish chamber that width dish is arranged in dummy piston body by jump ring；Described spring Bao Kawei is columnar structured, and between the step body of rod and the inwall of dummy piston body width dish chamber of tip-lever support, the upper end of spring bag card is provided with inside annular upper overturning, and lower end is provided with flange under outside annular；Spring bag card outer cover is equipped with balancing spring first, and balancing spring first is supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface；It is provided with balancing spring second between spring bag card inwall and the step body of rod, the lower end of balancing spring second is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of balancing spring second is less than upper overturning diameter, upper overturning internal diameter is more than or equal to the diameter of first body of rod, and the internal diameter of the upper end of balancing spring second is less than the diameter of first body of rod；Balancing spring third it is provided with in body of rod chamber,
Balancing spring second upper end is L1 to the distance of the step surface of the first body of rod lower end, the step surface of the second body of rod lower end is L3 to the distance of body of rod chamber upper surface, the upper end of balancing spring third is L2 to the distance between the 3rd body of rod lower surface, distance between upper surface and the width dish lower surface of described spring bag card is L, 4, L1 ＜ L2 ＜ L3 ＜ L4；
The top of described dummy piston body is provided with the edge turned up, and is provided with back-moving spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge；The outer surface of dummy piston body is the face of being slidably matched with the lower inner surface of the step dummy piston chamber in upper valve body, and the bottom of the outer surface of described dummy piston body is provided with cannelure, is provided with sealing ring in this cannelure；Spacing back-up ring and jump ring, the spacing back-up ring gear outer edge in the upper end of dummy piston body it is provided with in the upper edge of dummy piston chamber；
The bottom of described upper valve body is upper valve member cavity, it is provided with interlayer between the outside and upper valve body housing of upper valve member cavity, the top of upper interlayer is through with dummy piston chamber, upper valve member cavity sidepiece is provided with the enterprising QI KOU protruding horizontally up upper valve body housing, and the sidepiece of upper valve body is additionally provided with the upper gas outlet protruding horizontally up and communicating with upper interlayer；The upper valve hole that inside flange is formed it is provided with on the top of upper valve member cavity, on this, valve hole is corresponding with the external end head position of the body of rod chamber that the bottom of described dummy piston body is stretched out, and on this, valve bore dia is more than the diameter of the external end head of body of rod chamber, is provided with valve member in upper valve member inside cavity；
Upper valve member includes upper valve and the upper valve seat of annular of tubular, and upper valve seat is sleeved on outside valve, for the face of being slidably matched between inwall and the outer wall of upper valve of upper valve seat, and is provided with sealing structure；Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring；For the face of being slidably matched between outer wall and the inwall of upper valve member cavity of upper valve seat, and it is provided with sealing structure；The upper end of described upper valve is annular disk body, forms in-flanges and flanging at upper valve end respectively, be provided with valve spring between this flanging lower surface and upper surface of upper valve seat inside and outside this annular disk body；The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms valve opening and closing structure with the edge in valve hole, and the annular protrusion of inner side forms valve venting on-off structure with the outer face of the body of rod chamber of dummy piston body bottom；
Middle valve body include upper end be connected shell and inner core, and the interlayer that bottom is uncovered between shell and inner core, it is provided with relay piston inside the inner core of middle valve body, vertical hollow rod body that relay piston includes center and the stepped piston body being connected to around the body of rod, stepped piston body includes upper piston and lower piston, lower piston is more than upper piston, for the face of being slidably matched between upper piston and the interior tube inner surface of middle valve body, the interlayer of middle valve body forms slow chamber with the upper surface of lower piston, sidewall at middle valve body is provided with the slow interface connected with interlayer, the upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston body from the middle part of upper valve；
The top of lower valve body housing is the lower piston chamber that the lower piston with dummy piston body is mated, and lower piston is the face of being slidably matched with the inwall of this lower piston chamber；
The bottom of lower valve body is lower valve assembly cavity, it is provided with lower interlayer between the outside of lower valve assembly cavity and lower valve body housing, the top of lower interlayer is through with lower piston chamber, lower valve assembly cavity sidepiece is provided with the lower air inlet protruded horizontally up, and the sidepiece of lower valve body is additionally provided with the lower gas outlet protruding horizontally up and communicating with lower interlayer；The lower valve hole that inside flange is formed it is provided with on the top of lower valve assembly cavity, this lower valve hole is corresponding with the hollow rod body lower end position of described relay piston, and this lower valve bore dia is more than the diameter of the hollow rod body lower end of relay piston, is provided with lower valve assembly in lower valve assembly inside cavity；
Lower valve assembly includes lower valve and the lower valve seat of annular of tubular, and lower valve cover for seat is contained in outside lower valve, for the face of being slidably matched between inwall and the outer wall of lower valve of lower valve seat, and is provided with sealing structure；For the face of being slidably matched between outer wall and the inwall of lower valve assembly cavity of lower valve seat, and it is provided with sealing structure；The upper end of described lower valve is annular disk body, forms in-flanges and flanging respectively in lower valve end, be provided with lower valve spring between this flanging lower surface and upper surface of lower valve seat inside and outside this annular disk body；The upper surface of the annular disk body of lower valve upper end is provided with lower valve sealing gasket, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms lower valve on-off structure with the edge in lower valve hole, and the annular protrusion of inner side forms lower valve venting on-off structure with the hollow rod body lower end of relay piston；
It is provided with exhaust nozzle chamber at lower valve body, and it being installed with exhaust nozzle by jump ring, this exhaust nozzle includes urceolus and inner core, and the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on inside lower valve, for the face of being slidably matched between outer wall and the inwall of lower valve of inner core.
The external diameter of described balancing spring second mates with the internal diameter of spring bag card, the internal diameter of described balancing spring second and the diameter matches of second body of rod；The internal diameter of described balancing spring first mates with the external diameter of spring bag card；Described balancing spring third is rubber spring.
Described width dish lower surface is provided with annular groove outside first body of rod；This annular groove width mates with the width of the upper end of spring bag card.
Periphery, described tip-lever support upper end is set with the dirt-proof boot of annular, and this dirt-proof boot covers the annular region between tip-lever support upper end and upper valve body upper end.
The lower end of described exhaust nozzle is provided with dust-proof cushion.
The solution have the advantages that:
Two grades, the three grades of cadence braking master valves that this north benz band slows down, the spring bag card of its internal secondary points stops dummy piston and three grades of points are stopped dummy piston assembly, use upper, annular in-flanges, the structure of lower annular flanging, simplify the structure of spring bag card, reduce difficulty of processing and assembly difficulty, it is possible to the significantly qualification rate of improving product.
Spring bag card can pass through machining straight forming, it is also possible to carries out one-time formed processing by Sheet Metal Forming Technology, and the course of processing is simple, many that spring installation spring bag card within simultaneously is the simplest.
Accompanying drawing explanation
The cross-sectional view of the two-stage cadence braking master valve that this north of Fig. 1 benz band slows down；
The cross-sectional view of three grades of cadence braking master valves that this north of Fig. 2 benz band slows down；
Fig. 3 is that this secondary points is stopped the main TV structure schematic diagram of dummy piston assembly；
Fig. 4 is that these three grades of points are stopped the main TV structure schematic diagram of dummy piston assembly；
Fig. 5 is the main TV structure schematic diagram of spring bag card；
Fig. 6 is the A-A cross-sectional view of Fig. 5；
Fig. 7 is the main TV structure schematic diagram of tip-lever support；
Fig. 8 is the B-B cross-sectional view of Fig. 7；
null1. dust-proof cushion in figure、2. exhaust nozzle、3. jump ring、4.O type circle、5.O type circle、6.O type circle、7. lower valve spring、8. descend valve body、9. relay piston、10.O type circle、11.O type circle、Valve body in 12.、13.O type circle、14. jump rings、15.O type circle、16.O type circle、Valve spring on 17.、18.O type circle、19. back-moving springs、20. spacing back-up rings、21. dirt-proof boots、22 jump rings、23. bolts、24.O type circle、25. lower valve seats、26. lower valves、27.O type circle、28.O type circle、Valve seat on 29.、Valve on 30.、31. dummy piston body 32. tip-lever support 33. one-level balancing spring or balancing spring first、34. spring bag cards、35. 2 grades of balancing springs or balancing spring second、36. jump rings、37. upper valve bodies、38、Balancing spring third、39. enterprising QI KOU、Gas outlet on 40.、41 times air inlets、42. times gas outlets、43. slow interfaces；
Wherein flange under 32-1. width dish, 32-2. annular groove, 32-3. first body of rod, 32-4. second body of rod, 32-5. the 3rd body of rod, 34-1. upper overturning, 34-2..
Detailed description of the invention
Embodiment: see Fig. 1,3, Fig. 5-8, a kind of the north benz band slow down two-stage cadence braking master valve, including the upper valve body being bolted together, middle valve body, lower valve body,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step,
Being provided with secondary points in this dummy piston chamber to stop dummy piston assembly, including dummy piston body, spring bag card, tip-lever support, the top of dummy piston body is columnar width dish chamber, and the cavity shape projection that the bottom of dummy piston body is stretched out is body of rod chamber；The top of described tip-lever support is width dish, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, it is followed successively by first body of rod, second body of rod, the 3rd body of rod from top to down, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, in the width dish chamber that width dish is arranged in dummy piston body by jump ring；Described spring Bao Kawei is columnar structured, and between the step body of rod and the inwall of dummy piston body width dish chamber of tip-lever support, the upper end of spring bag card is provided with inside annular upper overturning, and lower end is provided with flange under outside annular；Spring bag card outer cover is equipped with one-level balancing spring, and one-level balancing spring is supported under the lower surface of tip-lever support width dish and spring bag card annular between flange upper surface；It is provided with two grades of balancing springs between spring bag card inwall and the step body of rod, the lower end of two grades of balancing springs is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of two grades of balancing springs is more than upper overturning internal diameter, upper overturning internal diameter is more than or equal to the diameter of first body of rod, and the internal diameter of the upper end of two grades of balancing springs is less than the diameter of first body of rod；Two grades of balancing spring upper ends are L1 to the distance of the step surface of the first body of rod lower end, the step surface of the second body of rod lower end is L2 to the distance of body of rod chamber upper surface, distance between upper surface and the width dish lower surface of described spring bag card is L4, L1 ＜ L2 ＜ L4；The inside of tip-lever support is provided with push rod chamber,
The top of described dummy piston body is provided with the edge turned up, and is provided with back-moving spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge；The outer surface of dummy piston body is the face of being slidably matched with the lower inner surface of the step dummy piston chamber in upper valve body, and the bottom of the outer surface of described dummy piston body is provided with cannelure, is provided with sealing ring in this cannelure；Spacing back-up ring and jump ring, the spacing back-up ring gear outer edge in the upper end of dummy piston body it is provided with in the upper edge of dummy piston chamber.
The bottom of described upper valve body is upper valve member cavity, it is provided with interlayer between the outside and upper valve body housing of upper valve member cavity, the top of upper interlayer is through with dummy piston chamber, upper valve member cavity sidepiece is provided with the enterprising QI KOU protruding horizontally up upper valve body housing, and the sidepiece of upper valve body is additionally provided with the upper gas outlet protruding horizontally up and communicating with upper interlayer；The upper valve hole that inside flange is formed it is provided with on the top of upper valve member cavity, on this, valve hole is corresponding with the external end head position of the body of rod chamber that the bottom of described dummy piston body is stretched out, and on this, valve bore dia is more than the diameter of the external end head of body of rod chamber, is provided with valve member in upper valve member inside cavity；
Upper valve member includes upper valve and the upper valve seat of annular of tubular, and upper valve seat is sleeved on outside valve, for the face of being slidably matched between inwall and the outer wall of upper valve of upper valve seat, and is provided with sealing structure；Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring；For the face of being slidably matched between outer wall and the inwall of upper valve member cavity of upper valve seat, and it is provided with sealing structure；The upper end of described upper valve is annular disk body, forms in-flanges and flanging at upper valve end respectively, be provided with valve spring between this flanging lower surface and upper surface of upper valve seat inside and outside this annular disk body；The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms valve opening and closing structure with the edge in valve hole, and the annular protrusion of inner side forms valve venting on-off structure with the outer face of the body of rod chamber of dummy piston body bottom；
Middle valve body include upper end be connected shell and inner core, and the interlayer that bottom is uncovered between shell and inner core, it is provided with relay piston inside the inner core of middle valve body, vertical hollow rod body that relay piston includes center and the stepped piston body being connected to around the body of rod, stepped piston body includes upper piston and lower piston, lower piston is more than upper piston, for the face of being slidably matched between upper piston and the interior tube inner surface of middle valve body, the interlayer of middle valve body forms slow chamber with the upper surface of lower piston, sidewall at middle valve body is provided with the slow interface connected with interlayer, the upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston body from the middle part of upper valve；
The top of lower valve body housing is the lower piston chamber that the lower piston with dummy piston body is mated, and lower piston is the face of being slidably matched with the inwall of this lower piston chamber；
The bottom of lower valve body is lower valve assembly cavity, it is provided with lower interlayer between the outside of lower valve assembly cavity and lower valve body housing, the top of lower interlayer is through with lower piston chamber, lower valve assembly cavity sidepiece is provided with the lower air inlet protruding horizontally up lower valve body, and the sidepiece of lower valve body is additionally provided with the lower gas outlet protruding horizontally up and communicating with lower interlayer；The lower valve hole that inside flange is formed it is provided with on the top of lower valve assembly cavity, this lower valve hole is corresponding with the hollow rod body lower end position of described relay piston, and this lower valve bore dia is more than the diameter of the hollow rod body lower end of relay piston, is provided with lower valve assembly in lower valve assembly inside cavity；
Lower valve assembly includes lower valve and the lower valve seat of annular of tubular, and lower valve cover for seat is contained in outside lower valve, for the face of being slidably matched between inwall and the outer wall of lower valve of lower valve seat, and is provided with sealing structure；For the face of being slidably matched between outer wall and the inwall of lower valve assembly cavity of lower valve seat, and it is provided with sealing structure；The upper end of described lower valve is annular disk body, forms in-flanges and flanging respectively in lower valve end, be provided with lower valve spring between this flanging lower surface and upper surface of lower valve seat inside and outside this annular disk body；The upper surface of the annular disk body of lower valve upper end is provided with lower valve sealing gasket, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms lower valve on-off structure with the edge in lower valve hole, and the annular protrusion of inner side forms lower valve venting on-off structure with the hollow rod body lower end of relay piston；
It is provided with exhaust nozzle chamber at lower valve body, and it being installed with exhaust nozzle by jump ring, this exhaust nozzle includes urceolus and inner core, and the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on inside lower valve, for the face of being slidably matched between outer wall and the inwall of lower valve of inner core.
The external diameter of two grades of described balancing springs mates with the internal diameter of spring bag card, the internal diameter of two grades of described balancing springs and the diameter matches of second body of rod；The internal diameter of described one-level balancing spring mates with the external diameter of spring bag card.
Described width dish lower surface is provided with annular groove outside first body of rod；This annular groove width mates with the width of the upper end of spring bag card.
Periphery, described tip-lever support upper end is set with the dirt-proof boot of annular, and this dirt-proof boot covers the annular region between tip-lever support upper end and upper valve body upper end.
The lower end of described exhaust nozzle is provided with dust-proof cushion.
Work process:
After driver steps on pedal, act on push rod, tip-lever support is the most descending under push rod effect, first to one-level balancing spring effect, it is made to compress with the descending of tip-lever support, after its stroke L1 completes, the first body of rod lower surface of tip-lever support and two grades of balancing spring upper-end contact, then one-level balancing spring and two grades of balancing spring cooperation；
For further description structure herein, need to select suitable one-level balancing spring and two grades of balancing springs, the rigidity of described one-level balancing spring is installed rear stage balancing spring more than the rigidity of two grades of balancing springs, this dummy piston assembly the lower flange of spring bag card is pressed onto the lower surface of width dish chamber；So first act on one-level balancing spring when tip-lever support is descending, after the stroke of L1 completes, simultaneously act on firsts and seconds balancing spring, two spring its effects side by side again, thus form twice buffering.
Another situation be exactly the spring selecting length just to mate with spring bag card internal height as two grades of balancing springs, thus need not limit the rigidity of two grades of balancing springs, also can realize secondary buffer.
Embodiment two: see Fig. 2,4, Fig. 5-8,5. one kind the north benz band slow down three grades of cadence braking master valves, including the upper valve body being bolted together, middle valve body, lower valve body,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step, is provided with three grades of points and stops dummy piston assembly in dummy piston chamber,
These three grades of points are stopped dummy piston assembly, including dummy piston body, spring bag card, tip-lever support,
The top of dummy piston body is columnar width dish chamber, and the cavity shape projection that the bottom of dummy piston body is stretched out is body of rod chamber；
The top of described tip-lever support is width dish, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, it is followed successively by first body of rod, second body of rod, the 3rd body of rod from top to down, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, in the width dish chamber that width dish is arranged in dummy piston body by jump ring；Described spring Bao Kawei is columnar structured, and between the step body of rod and the inwall of dummy piston body width dish chamber of tip-lever support, the upper end of spring bag card is provided with inside annular upper overturning, and lower end is provided with flange under outside annular；Spring bag card outer cover is equipped with balancing spring first, and balancing spring first is supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface；It is provided with balancing spring second between spring bag card inwall and the step body of rod, the lower end of balancing spring second is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of balancing spring second is less than upper overturning diameter, upper overturning internal diameter is more than or equal to the diameter of first body of rod, and the internal diameter of the upper end of balancing spring second is less than the diameter of first body of rod；Balancing spring third it is provided with in body of rod chamber,
Balancing spring second upper end is L1 to the distance of the step surface of the first body of rod lower end, the step surface of the second body of rod lower end is L3 to the distance of body of rod chamber upper surface, the upper end of balancing spring third is L2 to the distance between the 3rd body of rod lower surface, distance between upper surface and the width dish lower surface of described spring bag card is L, 4, L1 ＜ L2 ＜ L3 ＜ L4；
The top of described dummy piston body is provided with the edge turned up, and is provided with back-moving spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge；The outer surface of dummy piston body is the face of being slidably matched with the lower inner surface of the step dummy piston chamber in upper valve body, and the bottom of the outer surface of described dummy piston body is provided with cannelure, is provided with sealing ring in this cannelure；Spacing back-up ring and jump ring, the spacing back-up ring gear outer edge in the upper end of dummy piston body it is provided with in the upper edge of dummy piston chamber.
The bottom of described upper valve body is upper valve member cavity, it is provided with interlayer between the outside and upper valve body housing of upper valve member cavity, the top of upper interlayer is through with dummy piston chamber, upper valve member cavity sidepiece is provided with the enterprising QI KOU protruding horizontally up upper valve body housing, and the sidepiece of upper valve body is additionally provided with the upper gas outlet protruding horizontally up and communicating with upper interlayer；The upper valve hole that inside flange is formed it is provided with on the top of upper valve member cavity, on this, valve hole is corresponding with the external end head position of the body of rod chamber that the bottom of described dummy piston body is stretched out, and on this, valve bore dia is more than the diameter of the external end head of body of rod chamber, is provided with valve member in upper valve member inside cavity；
Upper valve member includes upper valve and the upper valve seat of annular of tubular, and upper valve seat is sleeved on outside valve, for the face of being slidably matched between inwall and the outer wall of upper valve of upper valve seat, and is provided with sealing structure；Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring；For the face of being slidably matched between outer wall and the inwall of upper valve member cavity of upper valve seat, and it is provided with sealing structure；The upper end of described upper valve is annular disk body, forms in-flanges and flanging at upper valve end respectively, be provided with valve spring between this flanging lower surface and upper surface of upper valve seat inside and outside this annular disk body；The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms valve opening and closing structure with the edge in valve hole, and the annular protrusion of inner side forms valve venting on-off structure with the outer face of the body of rod chamber of dummy piston body bottom；
Middle valve body include upper end be connected shell and inner core, and the interlayer that bottom is uncovered between shell and inner core, it is provided with relay piston inside the inner core of middle valve body, vertical hollow rod body that relay piston includes center and the stepped piston body being connected to around the body of rod, stepped piston body includes upper piston and lower piston, lower piston is more than upper piston, for the face of being slidably matched between upper piston and the interior tube inner surface of middle valve body, the interlayer of middle valve body forms slow chamber with the upper surface of lower piston, sidewall at middle valve body is provided with the slow interface connected with interlayer, the upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston body from the middle part of upper valve；
The top of lower valve body housing is the lower piston chamber that the lower piston with dummy piston body is mated, and lower piston is the face of being slidably matched with the inwall of this lower piston chamber；
The bottom of lower valve body is lower valve assembly cavity, it is provided with lower interlayer between the outside of lower valve assembly cavity and lower valve body housing, the top of lower interlayer is through with lower piston chamber, lower valve assembly cavity sidepiece is provided with the lower air inlet protruded horizontally up, and the sidepiece of lower valve body is additionally provided with the lower gas outlet protruding horizontally up and communicating with lower interlayer；The lower valve hole that inside flange is formed it is provided with on the top of lower valve assembly cavity, this lower valve hole is corresponding with the hollow rod body lower end position of described relay piston, and this lower valve bore dia is more than the diameter of the hollow rod body lower end of relay piston, is provided with lower valve assembly in lower valve assembly inside cavity；
Lower valve assembly includes lower valve and the lower valve seat of annular of tubular, and lower valve cover for seat is contained in outside lower valve, for the face of being slidably matched between inwall and the outer wall of lower valve of lower valve seat, and is provided with sealing structure；For the face of being slidably matched between outer wall and the inwall of lower valve assembly cavity of lower valve seat, and it is provided with sealing structure；The upper end of described lower valve is annular disk body, forms in-flanges and flanging respectively in lower valve end, be provided with lower valve spring between this flanging lower surface and upper surface of lower valve seat inside and outside this annular disk body；The upper surface of the annular disk body of lower valve upper end is provided with lower valve sealing gasket, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms lower valve on-off structure with the edge in lower valve hole, and the annular protrusion of inner side forms lower valve venting on-off structure with the hollow rod body lower end of relay piston；
It is provided with exhaust nozzle chamber at lower valve body, and it being installed with exhaust nozzle by jump ring, this exhaust nozzle includes urceolus and inner core, and the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on inside lower valve, for the face of being slidably matched between outer wall and the inwall of lower valve of inner core.
The external diameter of described balancing spring second mates with the internal diameter of spring bag card, the internal diameter of described balancing spring second and the diameter matches of second body of rod；The internal diameter of described balancing spring first mates with the external diameter of spring bag card；Described balancing spring third is rubber spring.
Described width dish lower surface is provided with annular groove outside first body of rod；This annular groove width mates with the width of the upper end of spring bag card.
Periphery, described tip-lever support upper end is set with the dirt-proof boot of annular, and this dirt-proof boot covers the annular region between tip-lever support upper end and upper valve body upper end.
The lower end of described exhaust nozzle is provided with dust-proof cushion.
Work process:
After driver steps on pedal, act on push rod, tip-lever support is the most descending under push rod effect, first to balancing spring first effect so that it is compress with the descending of tip-lever support, after its stroke L1 completes, 3rd body of rod lower end of tip-lever support contacts with balancing spring third, and now balancing spring third and balancing spring first act on jointly, after its L2 stroke completes, first body of rod lower surface of tip-lever support and balancing spring second upper-end contact, now balancing spring first, balancing spring third and balancing spring second cooperation；
For further description structure herein, need to select suitable balancing spring first and balancing spring second, the rigidity of described balancing spring first is installed back balance spring first more than the rigidity of balancing spring second, this dummy piston assembly the lower flange of spring bag card is pressed onto the lower surface of width dish chamber；So first act on balancing spring first when tip-lever support is descending, simultaneously act on again after the stroke of L2 completes balancing spring first, second, third, its effects side by side of three springs.
Another situation be exactly the spring selecting length just to mate with spring bag card internal height as balancing spring second, thus need not limit the rigidity of balancing spring second.
Claims (10)
1. the two-stage cadence braking master valve that benz band in the north slows down, including the upper valve body being bolted together, middle valve body, lower valve body,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step,
Being provided with secondary points in this dummy piston chamber to stop dummy piston assembly, including dummy piston body, spring bag card, tip-lever support, the top of dummy piston body is columnar width dish chamber, and the cavity shape projection that the bottom of dummy piston body is stretched out is body of rod chamber；The top of described tip-lever support is width dish, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, it is followed successively by first body of rod, second body of rod, the 3rd body of rod from top to down, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, in the width dish chamber that width dish is arranged in dummy piston body by jump ring；Described spring Bao Kawei is columnar structured, and between the step body of rod and the inwall of dummy piston body width dish chamber of tip-lever support, the upper end of spring bag card is provided with inside annular upper overturning, and lower end is provided with flange under outside annular；Spring bag card outer cover is equipped with one-level balancing spring, and one-level balancing spring is supported under the lower surface of tip-lever support width dish and spring bag card annular between flange upper surface；It is provided with two grades of balancing springs between spring bag card inwall and the step body of rod, the lower end of two grades of balancing springs is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of two grades of balancing springs is more than upper overturning internal diameter, upper overturning internal diameter is more than or equal to the diameter of first body of rod, and the internal diameter of the upper end of two grades of balancing springs is less than the diameter of first body of rod；
Two grades of balancing spring upper ends are L1 to the distance of the step surface of the first body of rod lower end, the step surface of the second body of rod lower end is L2 to the distance of body of rod chamber upper surface, distance between upper surface and the width dish lower surface of described spring bag card is L4, L1 ＜ L2 ＜ L4；The inside of tip-lever support is provided with push rod chamber,
The top of described dummy piston body is provided with the edge turned up, and is provided with back-moving spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge；The outer surface of dummy piston body is the face of being slidably matched with the lower inner surface of the step dummy piston chamber in upper valve body, and the bottom of the outer surface of described dummy piston body is provided with cannelure, is provided with sealing ring in this cannelure；Spacing back-up ring and jump ring, the spacing back-up ring gear outer edge in the upper end of dummy piston body it is provided with in the upper edge of dummy piston chamber；
The bottom of described upper valve body is upper valve member cavity, it is provided with interlayer between the outside and upper valve body housing of upper valve member cavity, the top of upper interlayer is through with dummy piston chamber, upper valve member cavity sidepiece is provided with the enterprising QI KOU protruding horizontally up upper valve body housing, and the sidepiece of upper valve body is additionally provided with the upper gas outlet protruding horizontally up and communicating with upper interlayer；The upper valve hole that inside flange is formed it is provided with on the top of upper valve member cavity, on this, valve hole is corresponding with the external end head position of the body of rod chamber that the bottom of described dummy piston body is stretched out, and on this, valve bore dia is more than the diameter of the external end head of body of rod chamber, is provided with valve member in upper valve member inside cavity；
Upper valve member includes upper valve and the upper valve seat of annular of tubular, and upper valve seat is sleeved on outside valve, for the face of being slidably matched between inwall and the outer wall of upper valve of upper valve seat, and is provided with sealing structure；Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring；For the face of being slidably matched between outer wall and the inwall of upper valve member cavity of upper valve seat, and it is provided with sealing structure；The upper end of described upper valve is annular disk body, forms in-flanges and flanging at upper valve end respectively, be provided with valve spring between this flanging lower surface and upper surface of upper valve seat inside and outside this annular disk body；The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms valve opening and closing structure with the edge in valve hole, and the annular protrusion of inner side forms valve venting on-off structure with the outer face of the body of rod chamber of dummy piston body bottom；
Middle valve body include upper end be connected shell and inner core, and the interlayer that bottom is uncovered between shell and inner core, it is provided with relay piston inside the inner core of middle valve body, vertical hollow rod body that relay piston includes center and the stepped piston body being connected to around the body of rod, stepped piston body includes upper piston and lower piston, lower piston is more than upper piston, for the face of being slidably matched between upper piston and the interior tube inner surface of middle valve body, the interlayer of middle valve body forms slow chamber with the upper surface of lower piston, sidewall at middle valve body is provided with the slow interface connected with interlayer, the upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston body from the middle part of upper valve；
The top of lower valve body housing is the lower piston chamber that the lower piston with dummy piston body is mated, and lower piston is the face of being slidably matched with the inwall of this lower piston chamber；
The bottom of lower valve body is lower valve assembly cavity, it is provided with lower interlayer between the outside of lower valve assembly cavity and lower valve body housing, the top of lower interlayer is through with lower piston chamber, lower valve assembly cavity sidepiece is provided with the lower air inlet protruding horizontally up lower valve body, and the sidepiece of lower valve body is additionally provided with the lower gas outlet protruding horizontally up and communicating with lower interlayer；The lower valve hole that inside flange is formed it is provided with on the top of lower valve assembly cavity, this lower valve hole is corresponding with the hollow rod body lower end position of described relay piston, and this lower valve bore dia is more than the diameter of the hollow rod body lower end of relay piston, is provided with lower valve assembly in lower valve assembly inside cavity；
Lower valve assembly includes lower valve and the lower valve seat of annular of tubular, and lower valve cover for seat is contained in outside lower valve, for the face of being slidably matched between inwall and the outer wall of lower valve of lower valve seat, and is provided with sealing structure；For the face of being slidably matched between outer wall and the inwall of lower valve assembly cavity of lower valve seat, and it is provided with sealing structure；The upper end of described lower valve is annular disk body, forms in-flanges and flanging respectively in lower valve end, be provided with lower valve spring between this flanging lower surface and upper surface of lower valve seat inside and outside this annular disk body；The upper surface of the annular disk body of lower valve upper end is provided with lower valve sealing gasket, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms lower valve on-off structure with the edge in lower valve hole, and the annular protrusion of inner side forms lower valve venting on-off structure with the hollow rod body lower end of relay piston；
It is provided with exhaust nozzle chamber at lower valve body, and it being installed with exhaust nozzle by jump ring, this exhaust nozzle includes urceolus and inner core, and the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on inside lower valve, for the face of being slidably matched between outer wall and the inwall of lower valve of inner core.
The two-stage cadence braking master valve that the north the most according to claim 1 benz band slows down, is characterized in that: the external diameter of two grades of described balancing springs mates with the internal diameter of spring bag card, the internal diameter of two grades of described balancing springs and the diameter matches of second body of rod；The internal diameter of described one-level balancing spring mates with the external diameter of spring bag card.
The two-stage cadence braking master valve that the north the most according to claim 1 benz band slows down, is characterized in that: described width dish lower surface is provided with annular groove outside first body of rod；This annular groove width mates with the width of the upper end of spring bag card.
The two-stage cadence braking master valve that the north the most according to claim 1 benz band slows down, is characterized in that: periphery, described tip-lever support upper end is set with the dirt-proof boot of annular, this dirt-proof boot covers the annular region between tip-lever support upper end and upper valve body upper end.
The two-stage cadence braking master valve that the north the most according to claim 1 benz band slows down, is characterized in that: the lower end of described exhaust nozzle is provided with dust-proof cushion.
6. three grades of cadence braking master valves that benz band in the north slows down, including the upper valve body being bolted together, middle valve body, lower valve body,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step, is provided with three grades of points and stops dummy piston assembly in dummy piston chamber,
These three grades of points are stopped dummy piston assembly, including dummy piston body, spring bag card, tip-lever support,
The top of dummy piston body is columnar width dish chamber, and the cavity shape projection that the bottom of dummy piston body is stretched out is body of rod chamber；
The top of described tip-lever support is width dish, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, it is followed successively by first body of rod, second body of rod, the 3rd body of rod from top to down, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, in the width dish chamber that width dish is arranged in dummy piston body by jump ring；Described spring Bao Kawei is columnar structured, and between the step body of rod and the inwall of dummy piston body width dish chamber of tip-lever support, the upper end of spring bag card is provided with inside annular upper overturning, and lower end is provided with flange under outside annular；Spring bag card outer cover is equipped with balancing spring first, and balancing spring first is supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface；It is provided with balancing spring second between spring bag card inwall and the step body of rod, the lower end of balancing spring second is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of balancing spring second is less than upper overturning diameter, upper overturning internal diameter is more than or equal to the diameter of first body of rod, and the internal diameter of the upper end of balancing spring second is less than the diameter of first body of rod；Balancing spring third it is provided with in body of rod chamber,
Balancing spring second upper end is L1 to the distance of the step surface of the first body of rod lower end, the step surface of the second body of rod lower end is L3 to the distance of body of rod chamber upper surface, the upper end of balancing spring third is L2 to the distance between the 3rd body of rod lower surface, distance between upper surface and the width dish lower surface of described spring bag card is L, 4, L1 ＜ L2 ＜ L3 ＜ L4；
The top of described dummy piston body is provided with the edge turned up, and is provided with back-moving spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge；The outer surface of dummy piston body is the face of being slidably matched with the lower inner surface of the step dummy piston chamber in upper valve body, and the bottom of the outer surface of described dummy piston body is provided with cannelure, is provided with sealing ring in this cannelure；Spacing back-up ring and jump ring, the spacing back-up ring gear outer edge in the upper end of dummy piston body it is provided with in the upper edge of dummy piston chamber；
The bottom of described upper valve body is upper valve member cavity, it is provided with interlayer between the outside and upper valve body housing of upper valve member cavity, the top of upper interlayer is through with dummy piston chamber, upper valve member cavity sidepiece is provided with the enterprising QI KOU protruding horizontally up upper valve body housing, and the sidepiece of upper valve body is additionally provided with the upper gas outlet protruding horizontally up and communicating with upper interlayer；The upper valve hole that inside flange is formed it is provided with on the top of upper valve member cavity, on this, valve hole is corresponding with the external end head position of the body of rod chamber that the bottom of described dummy piston body is stretched out, and on this, valve bore dia is more than the diameter of the external end head of body of rod chamber, is provided with valve member in upper valve member inside cavity；
Upper valve member includes upper valve and the upper valve seat of annular of tubular, and upper valve seat is sleeved on outside valve, for the face of being slidably matched between inwall and the outer wall of upper valve of upper valve seat, and is provided with sealing structure；Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring；For the face of being slidably matched between outer wall and the inwall of upper valve member cavity of upper valve seat, and it is provided with sealing structure；The upper end of described upper valve is annular disk body, forms in-flanges and flanging at upper valve end respectively, be provided with valve spring between this flanging lower surface and upper surface of upper valve seat inside and outside this annular disk body；The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms valve opening and closing structure with the edge in valve hole, and the annular protrusion of inner side forms valve venting on-off structure with the outer face of the body of rod chamber of dummy piston body bottom；
Middle valve body include upper end be connected shell and inner core, and the interlayer that bottom is uncovered between shell and inner core, it is provided with relay piston inside the inner core of middle valve body, vertical hollow rod body that relay piston includes center and the stepped piston body being connected to around the body of rod, stepped piston body includes upper piston and lower piston, lower piston is more than upper piston, for the face of being slidably matched between upper piston and the interior tube inner surface of middle valve body, the interlayer of middle valve body forms slow chamber with the upper surface of lower piston, sidewall at middle valve body is provided with the slow interface connected with interlayer, the upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston body from the middle part of upper valve；
The top of lower valve body housing is the lower piston chamber that the lower piston with dummy piston body is mated, and lower piston is the face of being slidably matched with the inwall of this lower piston chamber；
The bottom of lower valve body is lower valve assembly cavity, it is provided with lower interlayer between the outside of lower valve assembly cavity and lower valve body housing, the top of lower interlayer is through with lower piston chamber, lower valve assembly cavity sidepiece is provided with the lower air inlet protruded horizontally up, and the sidepiece of lower valve body is additionally provided with the lower gas outlet protruding horizontally up and communicating with lower interlayer；The lower valve hole that inside flange is formed it is provided with on the top of lower valve assembly cavity, this lower valve hole is corresponding with the hollow rod body lower end position of described relay piston, and this lower valve bore dia is more than the diameter of the hollow rod body lower end of relay piston, is provided with lower valve assembly in lower valve assembly inside cavity；
Lower valve assembly includes lower valve and the lower valve seat of annular of tubular, and lower valve cover for seat is contained in outside lower valve, for the face of being slidably matched between inwall and the outer wall of lower valve of lower valve seat, and is provided with sealing structure；For the face of being slidably matched between outer wall and the inwall of lower valve assembly cavity of lower valve seat, and it is provided with sealing structure；The upper end of described lower valve is annular disk body, forms in-flanges and flanging respectively in lower valve end, be provided with lower valve spring between this flanging lower surface and upper surface of lower valve seat inside and outside this annular disk body；The upper surface of the annular disk body of lower valve upper end is provided with lower valve sealing gasket, upper surface at this sealing gasket is provided with two annular protrusions, the annular protrusion in outside cooperatively forms lower valve on-off structure with the edge in lower valve hole, and the annular protrusion of inner side forms lower valve venting on-off structure with the hollow rod body lower end of relay piston；
It is provided with exhaust nozzle chamber at lower valve body, and it being installed with exhaust nozzle by jump ring, this exhaust nozzle includes urceolus and inner core, and the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on inside lower valve, for the face of being slidably matched between outer wall and the inwall of lower valve of inner core.
Three grades of cadence braking master valves that the north the most according to claim 6 benz band slows down, is characterized in that: the external diameter of described balancing spring second mates with the internal diameter of spring bag card, the internal diameter of described balancing spring second and the diameter matches of second body of rod；The internal diameter of described balancing spring first mates with the external diameter of spring bag card；Described balancing spring third is rubber spring.
Three grades of cadence braking master valves that the north the most according to claim 6 benz band slows down, is characterized in that: described width dish lower surface is provided with annular groove outside first body of rod；This annular groove width mates with the width of the upper end of spring bag card.
Three grades of cadence braking master valves that the north the most according to claim 6 benz band slows down, is characterized in that: periphery, described tip-lever support upper end is set with the dirt-proof boot of annular, this dirt-proof boot covers the annular region between tip-lever support upper end and upper valve body upper end.
Three grades of cadence braking master valves that the north the most according to claim 6 benz band slows down, is characterized in that: the lower end of described exhaust nozzle is provided with dust-proof cushion.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0241437A1 (en) * | 1986-04-02 | 1987-10-14 | INDUSTRIE MAGNETI MARELLI S.r.l. | Pneumatic distributor of the duplex type for motor vehicle braking systems |
| CN2671895Y (en) * | 2004-01-09 | 2005-01-19 | 张应彪 | Light and soft type automobile braking valve assembly |
| CN101857018A (en) * | 2010-05-18 | 2010-10-13 | 河南昌通科技有限公司 | Two-stage foot braking master valve |
| CN101857020A (en) * | 2010-05-18 | 2010-10-13 | 河南昌通科技有限公司 | Two-stage stab-braking brake master valve |
| CN204172894U (en) * | 2014-09-22 | 2015-02-25 | 昌通科技有限公司 | Secondary, three grades of cadence braking master valves that north benz band slows down |
-
2014
- 2014-09-22 CN CN201410485293.7A patent/CN104192130B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0241437A1 (en) * | 1986-04-02 | 1987-10-14 | INDUSTRIE MAGNETI MARELLI S.r.l. | Pneumatic distributor of the duplex type for motor vehicle braking systems |
| CN2671895Y (en) * | 2004-01-09 | 2005-01-19 | 张应彪 | Light and soft type automobile braking valve assembly |
| CN101857018A (en) * | 2010-05-18 | 2010-10-13 | 河南昌通科技有限公司 | Two-stage foot braking master valve |
| CN101857020A (en) * | 2010-05-18 | 2010-10-13 | 河南昌通科技有限公司 | Two-stage stab-braking brake master valve |
| CN204172894U (en) * | 2014-09-22 | 2015-02-25 | 昌通科技有限公司 | Secondary, three grades of cadence braking master valves that north benz band slows down |
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