CN104192128A - Jiefang151 two-stage/three-stage inching brake master valve - Google Patents
Jiefang151 two-stage/three-stage inching brake master valve Download PDFInfo
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- CN104192128A CN104192128A CN201410485249.6A CN201410485249A CN104192128A CN 104192128 A CN104192128 A CN 104192128A CN 201410485249 A CN201410485249 A CN 201410485249A CN 104192128 A CN104192128 A CN 104192128A
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Abstract
A Jiefang151 two-stage/three-stage inching brake master valve is characterized in that a spring clamp of a two-stage piston balance piston and three-stage piston balance piston is in a structure with an upper inner circular flange and a lower outer circular flange, the structure of the spring clamp is simplified, processing and assembly are easier, and yield of products can be greatly increased. The spring clamp can be directly made by cutting and can also be made once by a stamping process; the processing process is simple; meanwhile, a spring in the spring clamp is simpler to mount.
Description
Technical field
The present invention relates generally to the technical field of the parts of brake valve of car, specifically a kind of liberation 151 secondarys, three grades of cadence braking master valves.
Background technology
The brake system braking of truck of the prior art and heavy goods vehicles is too anxious, the bad control of feel, easily cause brake facing to heat up rapidly, cause carbonization, directly have influence on braking effect, it is too urgent to brake, also can cause partially sliding, affect resistance to overturning, thereby produce insecurity, or unnecessary economic loss.In order to solve these problem of truck, the two-stage cadence braking master valve that our unit successively proposes and the patent of three grades of dummy piston assemblies, can export " secondary or three grades of points are stopped " when brake in." point is stopped " principle can make pressurized air, in the control gentle chamber of pipeline, forms pulse, is applied to brake facing, and every subpulse is all equivalent to brake facing of instrument wiping.Not only can accomplish the strong combination of brake hubs and brake facing, and also improved to a great extent brake facing carbonization or formed adamantine layer, thereby avoid the phenomenon of poor stop to occur, reach good braking effect.Critical component in above-mentioned two patents is spring bag card, because spring bag card shape matching is special, and processing technology complexity, yield rate is not high, also has in addition the problem of mounting process complexity, and the quality of whole main brake valve is had a great impact.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of liberation 151 secondarys, three grades of cadence braking master valves.
Technical scheme of the present invention is: a kind of liberation 151 two-stage cadence braking master valves, comprise the upper valve body being bolted together, lower valve body,
Described upper valve body upper end is provided with pedal base, above pedal base, middle part is provided with opening, and the tubular sliding sleeve of upper end closed is installed in this opening, and sliding sleeve can move up and down in opening; Pedal lower end is hinged on the support otic placode on pedal base, and pedal middle part is provided with rotatable pinch roller and is pressed in the upper end of sliding sleeve,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step,
In this dummy piston chamber, be provided with the secondary points dummy piston assembly of stopping, comprise 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 stretch out the bottom of dummy piston body is body of rod chamber; The top of described tip-lever support is width dish, bottom is the three sections of step bodies of rod that attenuate successively that stretch out from width dish, be followed successively by from top to down first body of rod, second body of rod, the 3rd body of rod, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, and width dish is arranged in the width dish chamber in dummy piston body by jump ring; Described spring Bao Kawei is columnar structured, and between the step body of rod of tip-lever support and the inwall of dummy piston body width dish chamber, 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 balance spring, and one-level balance spring is supported under the lower surface of tip-lever support width dish and spring bag snap ring shape between flange upper surface; Between spring bag card inwall and the step body of rod, be provided with secondary balance spring, the lower end of secondary balance spring is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of secondary balance spring is greater 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 secondary balance spring is less than the diameter of first body of rod; Secondary balance spring 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 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, between push rod chamber and the upper surface of sliding sleeve, is provided with push rod;
The top of described dummy piston body is provided with the edge turning up, and between the step of the step dummy piston chamber in lower surface and the upper valve body at this edge, is provided with retracing spring first; The lower inner surface of the step dummy piston chamber in outside face and the upper valve body of dummy piston body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, in this circular groove, is provided with seal ring;
The middle part of described upper valve body is upper valve member cavity, between the outside of upper valve member cavity and upper valve body housing, be provided with interlayer, the top of upper interlayer and dummy piston chamber connect, upper valve member cavity sidepiece is provided with level and stretches out the enterprising gas port of upper valve body housing, and the sidepiece of upper valve body is also provided with the upper air extractor duct that level is stretched out and communicate with upper interlayer; Be provided with the upper valve hole that inside flange forms on the top of upper valve member cavity, the external end head position of the body of rod chamber that on this, stretch out with the bottom of described dummy piston body in valve hole is corresponding, and valve bore dia is greater than the diameter of the external end head of body of rod chamber on this, be provided with valve member in upper valve member inside cavity;
Upper valve member comprises the upper valve of tubular and the upper valve seat of annular, and upper valve seat is sleeved on outside valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of upper valve seat and the outer wall of upper valve; Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring; Between the inwall of the outer wall of upper valve seat and upper valve member cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in upper valve end, between this flanging lower surface and the upper surface of upper valve seat, is provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates the upper valve opening and closing structure of formation with the edge in valve hole, the outer face of the body of rod chamber of the annular protrusion of inner side and dummy piston bottom forms valve venting on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, relay piston comprises the vertical hollow rod body at center and is connected to body of rod piston body around, in piston body outer cover, piston bush is housed, between the inwall of piston bush and the outer wall of piston body, be bearing fit face, the inwall of piston bush and relay piston chamber is bearing fit face; The upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston from the middle part of upper valve; The lower surface of piston body is provided with spring between lower valve body upper end;
The top of lower valve body is lower valve assembly cavity, between the outside of lower valve assembly cavity and lower valve body housing, be provided with lower interlayer, the top of lower interlayer and lower piston chamber connect, lower valve assembly cavity sidepiece is provided with level and stretches out the lower admission port of lower valve body, and the sidepiece of lower valve body is also provided with the lower air extractor duct that level is stretched out and communicate with lower interlayer; Be provided with the lower valve hole that inside flange forms 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 greater than the diameter of the hollow rod body lower end of relay piston, be provided with lower valve assembly in lower valve assembly inside cavity;
Lower valve assembly comprises the lower valve of tubular and annular lower valve seat, and lower valve cover for seat is contained in outside lower valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of lower valve seat and the outer wall of lower valve; Between the inwall of the outer wall of lower valve seat and lower valve assembly cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in lower valve end, between this flanging lower surface and the upper surface of lower valve seat, is provided with lower valve spring; The upper surface of the annular disk body of lower valve upper end is provided with lower valve packing seal, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates formation lower valve on-off structure with the edge in lower valve hole, the hollow rod body lower end of the annular protrusion of inner side and relay piston forms lower valve venting on-off structure;
Be provided with exhaust nozzle chamber in lower valve body lower portion, and be installed with exhaust nozzle by jump ring, and this exhaust nozzle comprises urceolus and inner core, the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on lower valve inside, between the outer wall of inner core and the inwall of lower valve, is bearing fit face.
The external diameter of described secondary balance spring mates with the internal diameter of spring bag card, and the internal diameter of described secondary balance spring mates with the diameter of second body of rod; The internal diameter of described one-level balance spring mates with the external diameter of spring bag card.
Described width dish lower surface is provided with annular groove in the first body of rod outside; This annular groove width mates with the width of the upper end of spring bag card.
The lower end of described exhaust nozzle is provided with dust-proof cushion.
151 3 grades of cadence braking master valves of a kind of liberation, comprise the upper valve body being bolted together, lower valve body,
Described upper valve body upper end is provided with pedal base, above pedal base, middle part is provided with opening, and the tubular sliding sleeve of upper end closed is installed in this opening, and sliding sleeve can move up and down in opening; Pedal lower end is hinged on the support otic placode on pedal base, and pedal middle part is provided with rotatable pinch roller and is pressed in the upper end of sliding sleeve,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step, is provided with three grades of somes dummy piston assembly of stopping in dummy piston chamber,
These three grades of somes dummy piston assembly of stopping, comprises 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 stretch out the bottom of dummy piston body is body of rod chamber;
The top of described tip-lever support is width dish, bottom is the three sections of step bodies of rod that attenuate successively that stretch out from width dish, be followed successively by from top to down first body of rod, second body of rod, the 3rd body of rod, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, and width dish is arranged in the width dish chamber in dummy piston body by jump ring; Described spring Bao Kawei is columnar structured, and between the step body of rod of tip-lever support and the inwall of dummy piston body width dish chamber, 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 balance spring first, and balance spring first is supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface; Between spring bag card inwall and the step body of rod, be provided with balance spring second, the lower end of balance spring second is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of balance 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 balance spring second is less than the diameter of first body of rod; In body of rod chamber, be provided with balance spring the third,
Balance 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, distance between three body of rod lower surfaces, upper end to the of balance spring third is L2, 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 turning up, and between the step of the step dummy piston chamber in lower surface and the upper valve body at this edge, is provided with retracing spring first; The lower inner surface of the step dummy piston chamber in outside face and the upper valve body of dummy piston body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, in this circular groove, is provided with seal ring;
The middle part of described upper valve body is upper valve member cavity, between the outside of upper valve member cavity and upper valve body housing, be provided with interlayer, the top of upper interlayer and dummy piston chamber connect, upper valve member cavity sidepiece is provided with level and stretches out the enterprising gas port of upper valve body housing, and the sidepiece of upper valve body is also provided with the upper air extractor duct that level is stretched out and communicate with upper interlayer; Be provided with the upper valve hole that inside flange forms on the top of upper valve member cavity, the external end head position of the body of rod chamber that on this, stretch out with the bottom of described dummy piston body in valve hole is corresponding, and valve bore dia is greater than the diameter of the external end head of body of rod chamber on this, be provided with valve member in upper valve member inside cavity;
Upper valve member comprises the upper valve of tubular and the upper valve seat of annular, and upper valve seat is sleeved on outside valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of upper valve seat and the outer wall of upper valve; Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring; Between the inwall of the outer wall of upper valve seat and upper valve member cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in upper valve end, between this flanging lower surface and the upper surface of upper valve seat, is provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates the upper valve opening and closing structure of formation with the edge in valve hole, the outer face of the body of rod chamber of the annular protrusion of inner side and dummy piston bottom forms valve venting on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, relay piston comprises the vertical hollow rod body at center and is connected to body of rod piston body around, in piston body outer cover, piston bush is housed, between the inwall of piston bush and the outer wall of piston body, be bearing fit face, the inwall of piston bush and relay piston chamber is bearing fit face; The upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston from the middle part of upper valve; The lower surface of piston body is provided with spring between lower valve body upper end;
The top of lower valve body is lower valve assembly cavity, between the outside of lower valve assembly cavity and lower valve body housing, be provided with lower interlayer, the top of lower interlayer and lower piston chamber connect, lower valve assembly cavity sidepiece is provided with level and stretches out the lower admission port of lower valve body, and the sidepiece of lower valve body is also provided with the lower air extractor duct that level is stretched out and communicate with lower interlayer; Be provided with the lower valve hole that inside flange forms 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 greater than the diameter of the hollow rod body lower end of relay piston, be provided with lower valve assembly in lower valve assembly inside cavity;
Lower valve assembly comprises the lower valve of tubular and annular lower valve seat, and lower valve cover for seat is contained in outside lower valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of lower valve seat and the outer wall of lower valve; Between the inwall of the outer wall of lower valve seat and lower valve assembly cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in lower valve end, between this flanging lower surface and the upper surface of lower valve seat, is provided with lower valve spring; The upper surface of the annular disk body of lower valve upper end is provided with lower valve packing seal, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates formation lower valve on-off structure with the edge in lower valve hole, the hollow rod body lower end of the annular protrusion of inner side and relay piston forms lower valve venting on-off structure;
Be provided with exhaust nozzle chamber in lower valve body lower portion, and be installed with exhaust nozzle by jump ring, and this exhaust nozzle comprises urceolus and inner core, the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on lower valve inside, between the outer wall of inner core and the inwall of lower valve, is bearing fit face.
The external diameter of described balance spring second mates with the internal diameter of spring bag card, and the internal diameter of described balance spring second mates with the diameter of second body of rod; The internal diameter of described balance spring first mates with the external diameter of spring bag card; Described balance spring third is rubber spring.
Described width dish lower surface is provided with annular groove in the first body of rod outside; This annular groove width mates with the width of the upper end of spring bag card.
The lower end of described exhaust nozzle is provided with dust-proof cushion.
Technique effect of the present invention is:
These liberation 151 secondarys, three grades of cadence braking master valves, its inner secondary points stop spring bag card of dummy piston assembly of dummy piston and three grades of points of stopping, adopt upper, annular in-flanges, the structure of lower annular flanging, simplify the structure of spring bag card, difficulty of processing and assembly difficulty are reduced, significantly the qualification rate of improving product.
Spring bag card can pass through cutting straight forming, also can carry out one-time formed processing by Sheet Metal Forming Technology, and the course of processing is simple, and the spring fitting of spring bag card inside is also simple many simultaneously.
Brief description of the drawings
The cross-sectional view of these liberation 151 two-stage cadence braking master valves of Fig. 1;
The cross-sectional view of 151 3 grades of cadence braking master valves of this liberation of Fig. 2;
Fig. 3 is the stop main TV structure schematic diagram of dummy piston assembly of this secondary points;
Fig. 4 is the stop main TV structure schematic diagrams of dummy piston assembly of these three grades of points;
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;
1. dust-proof cushions in figure, 2. exhaust nozzle, 3. jump ring, 4.O type circle, 5. lower valve seat, 6. descend valve body, 7.O type circle, 8.O type circle, 9.O type circle, 10. lower valve spring, 11.O type circle, 12. springs, 13.O type circle, 14. piston bush, 15. relay pistons, 16. upper valve bodies, 17. retracing springs, 18. pedal bases, 19. bolts, 20. sliding sleeves, 21. push rods, 22. dust-proof cushions, 23.O type circle, 24. lower valves, 25. bolts, 26.O type circle, 27. jump rings, 28.O type circle, 29.O type circle, valve seat on 30., valve on 31., valve spring on 32., 33. dummy pistons, 34. tip-lever supports, 35.O type circle, 36. one-level balance springs or balance spring first, 37. spring bag cards, 38. secondary balance springs or balance spring second, 39. jump rings, 40. adjust screw, 41. jam nuts, 42. pedals, 43. slipmat, 44. bearing pins, 45. flat gaskets, 46. spring cotters, 47. rollers, 48. bearing pins, 49. flat gaskets, 50. spring cotters, 51. balance springs third, 52. enterprising gas ports, air extractor duct on 53, 54. times admission ports, 55. times air extractor ducts,
Wherein flange under 36-1. width dish, 36-2. annular groove, 36-3. first body of rod, 36-4. second body of rod, 36-5. the 3rd body of rod, 33-1. upper overturning, 33-2..
Detailed description of the invention
Embodiment: referring to Fig. 1,3, Fig. 5-8, a kind of liberation 151 two-stage cadence braking master valves, comprise the upper valve body being bolted together, lower valve body,
Described upper valve body upper end is provided with pedal base, above pedal base, middle part is provided with opening, and the tubular sliding sleeve of upper end closed is installed in this opening, and sliding sleeve can move up and down in opening; Pedal lower end is hinged on the support otic placode on pedal base, and pedal middle part is provided with rotatable pinch roller and is pressed in the upper end of sliding sleeve,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step,
In this dummy piston chamber, be provided with the secondary points dummy piston assembly of stopping, comprise 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 stretch out the bottom of dummy piston body is body of rod chamber; The top of described tip-lever support is width dish, bottom is the three sections of step bodies of rod that attenuate successively that stretch out from width dish, be followed successively by from top to down first body of rod, second body of rod, the 3rd body of rod, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, and width dish is arranged in the width dish chamber in dummy piston body by jump ring; Described spring Bao Kawei is columnar structured, and between the step body of rod of tip-lever support and the inwall of dummy piston body width dish chamber, 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 balance spring, and one-level balance spring is supported under the lower surface of tip-lever support width dish and spring bag snap ring shape between flange upper surface; Between spring bag card inwall and the step body of rod, be provided with secondary balance spring, the lower end of secondary balance spring is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of secondary balance spring is greater 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 secondary balance spring is less than the diameter of first body of rod; Secondary balance spring 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 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, between push rod chamber and the upper surface of sliding sleeve, is provided with push rod;
The top of described dummy piston body is provided with the edge turning up, and between the step of the step dummy piston chamber in lower surface and the upper valve body at this edge, is provided with retracing spring first; The lower inner surface of the step dummy piston chamber in outside face and the upper valve body of dummy piston body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, in this circular groove, is provided with seal ring;
The middle part of described upper valve body is upper valve member cavity, between the outside of upper valve member cavity and upper valve body housing, be provided with interlayer, the top of upper interlayer and dummy piston chamber connect, upper valve member cavity sidepiece is provided with level and stretches out the enterprising gas port of upper valve body housing, and the sidepiece of upper valve body is also provided with the upper air extractor duct that level is stretched out and communicate with upper interlayer; Be provided with the upper valve hole that inside flange forms on the top of upper valve member cavity, the external end head position of the body of rod chamber that on this, stretch out with the bottom of described dummy piston body in valve hole is corresponding, and valve bore dia is greater than the diameter of the external end head of body of rod chamber on this, be provided with valve member in upper valve member inside cavity;
Upper valve member comprises the upper valve of tubular and the upper valve seat of annular, and upper valve seat is sleeved on outside valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of upper valve seat and the outer wall of upper valve; Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring; Between the inwall of the outer wall of upper valve seat and upper valve member cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in upper valve end, between this flanging lower surface and the upper surface of upper valve seat, is provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates the upper valve opening and closing structure of formation with the edge in valve hole, the outer face of the body of rod chamber of the annular protrusion of inner side and dummy piston bottom forms valve venting on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, relay piston comprises the vertical hollow rod body at center and is connected to body of rod piston body around, in piston body outer cover, piston bush is housed, between the inwall of piston bush and the outer wall of piston body, be bearing fit face, the inwall of piston bush and relay piston chamber is bearing fit face; The upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston from the middle part of upper valve; The lower surface of piston body is provided with spring between lower valve body upper end;
The top of lower valve body is lower valve assembly cavity, between the outside of lower valve assembly cavity and lower valve body housing, be provided with lower interlayer, the top of lower interlayer and lower piston chamber connect, lower valve assembly cavity sidepiece is provided with level and stretches out the lower admission port of lower valve body, and the sidepiece of lower valve body is also provided with the lower air extractor duct that level is stretched out and communicate with lower interlayer; Be provided with the lower valve hole that inside flange forms 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 greater than the diameter of the hollow rod body lower end of relay piston, be provided with lower valve assembly in lower valve assembly inside cavity;
Lower valve assembly comprises the lower valve of tubular and annular lower valve seat, and lower valve cover for seat is contained in outside lower valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of lower valve seat and the outer wall of lower valve; Between the inwall of the outer wall of lower valve seat and lower valve assembly cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in lower valve end, between this flanging lower surface and the upper surface of lower valve seat, is provided with lower valve spring; The upper surface of the annular disk body of lower valve upper end is provided with lower valve packing seal, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates formation lower valve on-off structure with the edge in lower valve hole, the hollow rod body lower end of the annular protrusion of inner side and relay piston forms lower valve venting on-off structure;
Be provided with exhaust nozzle chamber in lower valve body lower portion, and be installed with exhaust nozzle by jump ring, and this exhaust nozzle comprises urceolus and inner core, the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on lower valve inside, between the outer wall of inner core and the inwall of lower valve, is bearing fit face.
The external diameter of described secondary balance spring mates with the internal diameter of spring bag card, and the internal diameter of described secondary balance spring mates with the diameter of second body of rod; The internal diameter of described one-level balance spring mates with the external diameter of spring bag card.
Described width dish lower surface is provided with annular groove in the first body of rod outside; This annular groove width mates with the width of the upper end of spring bag card.
The lower end of described exhaust nozzle is provided with dust-proof cushion.
Working process:
After driver's push down on the pedal, act on push rod, tip-lever support is first descending under push rod effect, first to the effect of one-level balance spring, make it follow the descending of tip-lever support and compress, after its stroke L1 completes, end in contact on the first body of rod lower surface of tip-lever support and secondary balance spring, then one-level balance spring and secondary balance spring co-operation;
For further description structure herein, need to select suitable one-level balance spring and secondary balance spring, the rigidity of described one-level balance spring is greater than the rigidity of secondary balance spring, and after this dummy piston assembly installation, one-level balance spring is pressed onto the lower flange of spring bag card the lower surface of width dish chamber; In the time that tip-lever support is descending, first act on like this one-level balance spring, after the stroke of L1 completes, act on again firsts and seconds balance spring simultaneously, two spring its effects side by side, thus form twice buffering.
Another situation is exactly to select the spring that just mates with spring bag card internal height of length as secondary balance spring, so just needn't limit the rigidity of secondary balance spring, also can realize secondary buffer.
Embodiment bis-: referring to Fig. 2,4, Fig. 5-8, in figure, 151 3 grades of cadence braking master valves of a kind of liberation, comprise the upper valve body being bolted together, lower valve body,
Described upper valve body upper end is provided with pedal base, above pedal base, middle part is provided with opening, and the tubular sliding sleeve of upper end closed is installed in this opening, and sliding sleeve can move up and down in opening; Pedal lower end is hinged on the support otic placode on pedal base, and pedal middle part is provided with rotatable pinch roller and is pressed in the upper end of sliding sleeve,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step, is provided with three grades of somes dummy piston assembly of stopping in dummy piston chamber,
These three grades of somes dummy piston assembly of stopping, comprises 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 stretch out the bottom of dummy piston body is body of rod chamber;
The top of described tip-lever support is width dish, bottom is the three sections of step bodies of rod that attenuate successively that stretch out from width dish, be followed successively by from top to down first body of rod, second body of rod, the 3rd body of rod, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, and width dish is arranged in the width dish chamber in dummy piston body by jump ring; Described spring Bao Kawei is columnar structured, and between the step body of rod of tip-lever support and the inwall of dummy piston body width dish chamber, 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 balance spring first, and balance spring first is supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface; Between spring bag card inwall and the step body of rod, be provided with balance spring second, the lower end of balance spring second is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of balance 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 balance spring second is less than the diameter of first body of rod; In body of rod chamber, be provided with balance spring the third,
Balance 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, distance between three body of rod lower surfaces, upper end to the of balance spring third is L2, 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 turning up, and between the step of the step dummy piston chamber in lower surface and the upper valve body at this edge, is provided with retracing spring first; The lower inner surface of the step dummy piston chamber in outside face and the upper valve body of dummy piston body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, in this circular groove, is provided with seal ring;
The middle part of described upper valve body is upper valve member cavity, between the outside of upper valve member cavity and upper valve body housing, be provided with interlayer, the top of upper interlayer and dummy piston chamber connect, upper valve member cavity sidepiece is provided with level and stretches out the enterprising gas port of upper valve body housing, and the sidepiece of upper valve body is also provided with the upper air extractor duct that level is stretched out and communicate with upper interlayer; Be provided with the upper valve hole that inside flange forms on the top of upper valve member cavity, the external end head position of the body of rod chamber that on this, stretch out with the bottom of described dummy piston body in valve hole is corresponding, and valve bore dia is greater than the diameter of the external end head of body of rod chamber on this, be provided with valve member in upper valve member inside cavity;
Upper valve member comprises the upper valve of tubular and the upper valve seat of annular, and upper valve seat is sleeved on outside valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of upper valve seat and the outer wall of upper valve; Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring; Between the inwall of the outer wall of upper valve seat and upper valve member cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in upper valve end, between this flanging lower surface and the upper surface of upper valve seat, is provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates the upper valve opening and closing structure of formation with the edge in valve hole, the outer face of the body of rod chamber of the annular protrusion of inner side and dummy piston bottom forms valve venting on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, relay piston comprises the vertical hollow rod body at center and is connected to body of rod piston body around, in piston body outer cover, piston bush is housed, between the inwall of piston bush and the outer wall of piston body, be bearing fit face, the inwall of piston bush and relay piston chamber is bearing fit face; The upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston from the middle part of upper valve; The lower surface of piston body is provided with spring between lower valve body upper end;
The top of lower valve body is lower valve assembly cavity, between the outside of lower valve assembly cavity and lower valve body housing, be provided with lower interlayer, the top of lower interlayer and lower piston chamber connect, lower valve assembly cavity sidepiece is provided with level and stretches out the lower admission port of lower valve body, and the sidepiece of lower valve body is also provided with the lower air extractor duct that level is stretched out and communicate with lower interlayer; Be provided with the lower valve hole that inside flange forms 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 greater than the diameter of the hollow rod body lower end of relay piston, be provided with lower valve assembly in lower valve assembly inside cavity;
Lower valve assembly comprises the lower valve of tubular and annular lower valve seat, and lower valve cover for seat is contained in outside lower valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of lower valve seat and the outer wall of lower valve; Between the inwall of the outer wall of lower valve seat and lower valve assembly cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in lower valve end, between this flanging lower surface and the upper surface of lower valve seat, is provided with lower valve spring; The upper surface of the annular disk body of lower valve upper end is provided with lower valve packing seal, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates formation lower valve on-off structure with the edge in lower valve hole, the hollow rod body lower end of the annular protrusion of inner side and relay piston forms lower valve venting on-off structure;
Be provided with exhaust nozzle chamber in lower valve body lower portion, and be installed with exhaust nozzle by jump ring, and this exhaust nozzle comprises urceolus and inner core, the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on lower valve inside, between the outer wall of inner core and the inwall of lower valve, is bearing fit face.
The external diameter of described balance spring second mates with the internal diameter of spring bag card, and the internal diameter of described balance spring second mates with the diameter of second body of rod; The internal diameter of described balance spring first mates with the external diameter of spring bag card; Described balance spring third is rubber spring.
Described width dish lower surface is provided with annular groove in the first body of rod outside; This annular groove width mates with the width of the upper end of spring bag card.
The lower end of described exhaust nozzle is provided with dust-proof cushion.
Working process:
After driver's push down on the pedal, act on push rod, tip-lever support is first descending under push rod effect, first to the effect of balance spring first, makes it follow the descending of tip-lever support and compress, after its stroke L1 completes, the 3rd body of rod lower end of tip-lever support contacts with balance spring third, and now balance spring third and the combined action of balance spring first, after its L2 stroke completes, end in contact in the first body of rod lower surface of tip-lever support and balance spring second, now balance spring first, balance spring third and balance spring second co-operation;
For further description structure herein, need to select suitable balance spring first and balance spring second, the rigidity of described balance spring first is greater than the rigidity of balance spring second, and this dummy piston assembly installation back balance spring first is pressed onto the lower flange of spring bag card the lower surface of width dish chamber; In the time that tip-lever support is descending, first act on like this balance spring first, after the stroke of L2 completes, act on again balance spring first, second, the third, three spring its effect side by side simultaneously.
Another situation is exactly to select the spring that just mates with spring bag card internal height of length as balance spring second, so just needn't limit the rigidity of balance spring second.
Claims (8)
1. liberation 151 two-stage cadence braking master valves, comprise the upper valve body being bolted together, lower valve body,
Described upper valve body upper end is provided with pedal base, above pedal base, middle part is provided with opening, and the tubular sliding sleeve of upper end closed is installed in this opening, and sliding sleeve can move up and down in opening; Pedal lower end is hinged on the support otic placode on pedal base, and pedal middle part is provided with rotatable pinch roller and is pressed in the upper end of sliding sleeve,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step,
In this dummy piston chamber, be provided with the secondary points dummy piston assembly of stopping, comprise 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 stretch out the bottom of dummy piston body is body of rod chamber; The top of described tip-lever support is width dish, bottom is the three sections of step bodies of rod that attenuate successively that stretch out from width dish, be followed successively by from top to down first body of rod, second body of rod, the 3rd body of rod, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, and width dish is arranged in the width dish chamber in dummy piston body by jump ring; Described spring Bao Kawei is columnar structured, and between the step body of rod of tip-lever support and the inwall of dummy piston body width dish chamber, 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 balance spring, and one-level balance spring is supported under the lower surface of tip-lever support width dish and spring bag snap ring shape between flange upper surface; Between spring bag card inwall and the step body of rod, be provided with secondary balance spring, the lower end of secondary balance spring is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of secondary balance spring is greater 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 secondary balance spring is less than the diameter of first body of rod; Secondary balance spring 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 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, between push rod chamber and the upper surface of sliding sleeve, is provided with push rod;
The top of described dummy piston body is provided with the edge turning up, and between the step of the step dummy piston chamber in lower surface and the upper valve body at this edge, is provided with retracing spring first; The lower inner surface of the step dummy piston chamber in outside face and the upper valve body of dummy piston body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, in this circular groove, is provided with seal ring;
The middle part of described upper valve body is upper valve member cavity, between the outside of upper valve member cavity and upper valve body housing, be provided with interlayer, the top of upper interlayer and dummy piston chamber connect, upper valve member cavity sidepiece is provided with level and stretches out the enterprising gas port of upper valve body housing, and the sidepiece of upper valve body is also provided with the upper air extractor duct that level is stretched out and communicate with upper interlayer; Be provided with the upper valve hole that inside flange forms on the top of upper valve member cavity, the external end head position of the body of rod chamber that on this, stretch out with the bottom of described dummy piston body in valve hole is corresponding, and valve bore dia is greater than the diameter of the external end head of body of rod chamber on this, be provided with valve member in upper valve member inside cavity;
Upper valve member comprises the upper valve of tubular and the upper valve seat of annular, and upper valve seat is sleeved on outside valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of upper valve seat and the outer wall of upper valve; Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring; Between the inwall of the outer wall of upper valve seat and upper valve member cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in upper valve end, between this flanging lower surface and the upper surface of upper valve seat, is provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates the upper valve opening and closing structure of formation with the edge in valve hole, the outer face of the body of rod chamber of the annular protrusion of inner side and dummy piston bottom forms valve venting on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, relay piston comprises the vertical hollow rod body at center and is connected to body of rod piston body around, in piston body outer cover, piston bush is housed, between the inwall of piston bush and the outer wall of piston body, be bearing fit face, the inwall of piston bush and relay piston chamber is bearing fit face; The upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston from the middle part of upper valve; The lower surface of piston body is provided with spring between lower valve body upper end;
The top of lower valve body is lower valve assembly cavity, between the outside of lower valve assembly cavity and lower valve body housing, be provided with lower interlayer, the top of lower interlayer and lower piston chamber connect, lower valve assembly cavity sidepiece is provided with level and stretches out the lower admission port of lower valve body, and the sidepiece of lower valve body is also provided with the lower air extractor duct that level is stretched out and communicate with lower interlayer; Be provided with the lower valve hole that inside flange forms 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 greater than the diameter of the hollow rod body lower end of relay piston, be provided with lower valve assembly in lower valve assembly inside cavity;
Lower valve assembly comprises the lower valve of tubular and annular lower valve seat, and lower valve cover for seat is contained in outside lower valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of lower valve seat and the outer wall of lower valve; Between the inwall of the outer wall of lower valve seat and lower valve assembly cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in lower valve end, between this flanging lower surface and the upper surface of lower valve seat, is provided with lower valve spring; The upper surface of the annular disk body of lower valve upper end is provided with lower valve packing seal, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates formation lower valve on-off structure with the edge in lower valve hole, the hollow rod body lower end of the annular protrusion of inner side and relay piston forms lower valve venting on-off structure;
Be provided with exhaust nozzle chamber in lower valve body lower portion, and be installed with exhaust nozzle by jump ring, and this exhaust nozzle comprises urceolus and inner core, the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on lower valve inside, between the outer wall of inner core and the inwall of lower valve, is bearing fit face.
2. liberation 151 two-stage cadence braking master valves according to claim 1, is characterized in that: the external diameter of described secondary balance spring mates with the internal diameter of spring bag card, and the internal diameter of described secondary balance spring mates with the diameter of second body of rod; The internal diameter of described one-level balance spring mates with the external diameter of spring bag card.
3. liberation 151 two-stage cadence braking master valves according to claim 1, is characterized in that: described width dish lower surface is provided with annular groove in the first body of rod outside; This annular groove width mates with the width of the upper end of spring bag card.
4. liberation 151 two-stage cadence braking master valves according to claim 1, is characterized in that: the lower end of described exhaust nozzle is provided with dust-proof cushion.
5. 151 3 grades of cadence braking master valves of liberation, comprise the upper valve body being bolted together, lower valve body,
Described upper valve body upper end is provided with pedal base, above pedal base, middle part is provided with opening, and the tubular sliding sleeve of upper end closed is installed in this opening, and sliding sleeve can move up and down in opening; Pedal lower end is hinged on the support otic placode on pedal base, and pedal middle part is provided with rotatable pinch roller and is pressed in the upper end of sliding sleeve,
The first half of upper valve body enclosure interior is provided with the dummy piston chamber of step, is provided with three grades of somes dummy piston assembly of stopping in dummy piston chamber,
These three grades of somes dummy piston assembly of stopping, comprises 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 stretch out the bottom of dummy piston body is body of rod chamber;
The top of described tip-lever support is width dish, bottom is the three sections of step bodies of rod that attenuate successively that stretch out from width dish, be followed successively by from top to down first body of rod, second body of rod, the 3rd body of rod, the hypomere of the 3rd body of rod inserts in the body of rod chamber of dummy piston body bottom, and width dish is arranged in the width dish chamber in dummy piston body by jump ring; Described spring Bao Kawei is columnar structured, and between the step body of rod of tip-lever support and the inwall of dummy piston body width dish chamber, 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 balance spring first, and balance spring first is supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface; Between spring bag card inwall and the step body of rod, be provided with balance spring second, the lower end of balance spring second is supported on the lower surface of dummy piston body width dish chamber, the external diameter of the upper end of balance 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 balance spring second is less than the diameter of first body of rod; In body of rod chamber, be provided with balance spring the third,
Balance 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, distance between three body of rod lower surfaces, upper end to the of balance spring third is L2, 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 turning up, and between the step of the step dummy piston chamber in lower surface and the upper valve body at this edge, is provided with retracing spring first; The lower inner surface of the step dummy piston chamber in outside face and the upper valve body of dummy piston body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, in this circular groove, is provided with seal ring;
The middle part of described upper valve body is upper valve member cavity, between the outside of upper valve member cavity and upper valve body housing, be provided with interlayer, the top of upper interlayer and dummy piston chamber connect, upper valve member cavity sidepiece is provided with level and stretches out the enterprising gas port of upper valve body housing, and the sidepiece of upper valve body is also provided with the upper air extractor duct that level is stretched out and communicate with upper interlayer; Be provided with the upper valve hole that inside flange forms on the top of upper valve member cavity, the external end head position of the body of rod chamber that on this, stretch out with the bottom of described dummy piston body in valve hole is corresponding, and valve bore dia is greater than the diameter of the external end head of body of rod chamber on this, be provided with valve member in upper valve member inside cavity;
Upper valve member comprises the upper valve of tubular and the upper valve seat of annular, and upper valve seat is sleeved on outside valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of upper valve seat and the outer wall of upper valve; Upper valve seat is arranged on the lower end of upper valve member chamber by jump ring; Between the inwall of the outer wall of upper valve seat and upper valve member cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in upper valve end, between this flanging lower surface and the upper surface of upper valve seat, is provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates the upper valve opening and closing structure of formation with the edge in valve hole, the outer face of the body of rod chamber of the annular protrusion of inner side and dummy piston bottom forms valve venting on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, relay piston comprises the vertical hollow rod body at center and is connected to body of rod piston body around, in piston body outer cover, piston bush is housed, between the inwall of piston bush and the outer wall of piston body, be bearing fit face, the inwall of piston bush and relay piston chamber is bearing fit face; The upper end of the hollow rod body of relay piston passes corresponding with the body of rod chamber lower end of dummy piston from the middle part of upper valve; The lower surface of piston body is provided with spring between lower valve body upper end;
The top of lower valve body is lower valve assembly cavity, between the outside of lower valve assembly cavity and lower valve body housing, be provided with lower interlayer, the top of lower interlayer and lower piston chamber connect, lower valve assembly cavity sidepiece is provided with level and stretches out the lower admission port of lower valve body, and the sidepiece of lower valve body is also provided with the lower air extractor duct that level is stretched out and communicate with lower interlayer; Be provided with the lower valve hole that inside flange forms 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 greater than the diameter of the hollow rod body lower end of relay piston, be provided with lower valve assembly in lower valve assembly inside cavity;
Lower valve assembly comprises the lower valve of tubular and annular lower valve seat, and lower valve cover for seat is contained in outside lower valve, is bearing fit face, and is provided with hermetically-sealed construction between the inwall of lower valve seat and the outer wall of lower valve; Between the inwall of the outer wall of lower valve seat and lower valve assembly cavity, be bearing fit face, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, forms respectively in-flanges and flanging in the inside and outside both sides of this annular disk body in lower valve end, between this flanging lower surface and the upper surface of lower valve seat, is provided with lower valve spring; The upper surface of the annular disk body of lower valve upper end is provided with lower valve packing seal, be provided with two annular protrusions at the upper surface of sealing pad, the annular protrusion in outside coordinates formation lower valve on-off structure with the edge in lower valve hole, the hollow rod body lower end of the annular protrusion of inner side and relay piston forms lower valve venting on-off structure;
Be provided with exhaust nozzle chamber in lower valve body lower portion, and be installed with exhaust nozzle by jump ring, and this exhaust nozzle comprises urceolus and inner core, the urceolus of exhaust nozzle is supported on the lower end of lower valve cover for seat, inner core is sleeved on lower valve inside, between the outer wall of inner core and the inwall of lower valve, is bearing fit face.
6. 151 3 grades of cadence braking master valves of liberation according to claim 5, is characterized in that: the external diameter of described balance spring second mates with the internal diameter of spring bag card, and the internal diameter of described balance spring second mates with the diameter of second body of rod; The internal diameter of described balance spring first mates with the external diameter of spring bag card; Described balance spring third is rubber spring.
7. 151 3 grades of cadence braking master valves of liberation according to claim 5, is characterized in that: described width dish lower surface is provided with annular groove in the first body of rod outside; This annular groove width mates with the width of the upper end of spring bag card.
8. 151 3 grades of cadence braking master valves of liberation according to claim 5, is characterized in that: the lower end of described exhaust nozzle is provided with dust-proof cushion.
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| CN201410485249.6A CN104192128B (en) | 2014-09-22 | 2014-09-22 | Jiefang151 two-stage/three-stage inching brake master valve |
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| CN104192128B CN104192128B (en) | 2017-01-25 |
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| DE2817991A1 (en) * | 1978-04-25 | 1979-11-08 | Bosch Gmbh Robert | TWO-CIRCUIT CONTROL VALVE |
| CN201494429U (en) * | 2009-07-21 | 2010-06-02 | 广西柳工机械股份有限公司 | Full hydraulic brake valve |
| CN101837774A (en) * | 2010-05-31 | 2010-09-22 | 河南昌通科技有限公司 | Two-stage cadence braking master valve (type V) |
| 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 |
| CN204172889U (en) * | 2014-09-22 | 2015-02-25 | 昌通科技有限公司 | Liberate 151 secondarys, three grades of cadence braking master valves |
-
2014
- 2014-09-22 CN CN201410485249.6A patent/CN104192128B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2817991A1 (en) * | 1978-04-25 | 1979-11-08 | Bosch Gmbh Robert | TWO-CIRCUIT CONTROL VALVE |
| CN201494429U (en) * | 2009-07-21 | 2010-06-02 | 广西柳工机械股份有限公司 | Full hydraulic brake valve |
| 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 |
| CN101837774A (en) * | 2010-05-31 | 2010-09-22 | 河南昌通科技有限公司 | Two-stage cadence braking master valve (type V) |
| CN204172889U (en) * | 2014-09-22 | 2015-02-25 | 昌通科技有限公司 | Liberate 151 secondarys, three grades of cadence braking master valves |
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Granted publication date: 20170125 Termination date: 20200922 |
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| CF01 | Termination of patent right due to non-payment of annual fee |