CN204172891U - Yangze river and Huai river secondary, three grades of cadence braking master valves - Google Patents
Yangze river and Huai river secondary, three grades of cadence braking master valves Download PDFInfo
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- CN204172891U CN204172891U CN201420544394.2U CN201420544394U CN204172891U CN 204172891 U CN204172891 U CN 204172891U CN 201420544394 U CN201420544394 U CN 201420544394U CN 204172891 U CN204172891 U CN 204172891U
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Abstract
A kind of Yangze river and Huai river secondary, three grades of cadence braking master valves, stop dummy piston and three grades of points of the secondary points of its inside is stopped the spring bag card of dummy piston assembly, adopt upper, annular in-flanges, the structure of lower annular flanging, simplify the structure of spring bag card, reduce difficulty of processing and assembly difficulty, can the qualification rate of significantly 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.
Description
Technical field
The utility model relates generally to the technical field of the parts of brake valve of car, specifically a kind of Yangze river and Huai river secondary, three grades of cadence braking master valves.
Background technology
The brake system of truck of the prior art and heavy goods vehicles is too anxious, the bad control of feel, brake facing is easily caused 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, thus produce insecurity, or unnecessary economic loss.Problem during in order to solve these brakes of truck, the patent of the two-stage cadence braking master valve that our unit successively proposes and three grades of dummy piston assemblies, can export " secondary or three grades of points are stopped "." point is stopped " principle can make pressurized air, forms pulse, be applied to brake facing in the control gentle room of pipeline, and every subpulse is all equivalent to instrument wiping brake facing.Not only can accomplish that brake hubs is combined effectively with brake facing, and further improve brake facing carbonization to a great extent or form adamantine layer, thus avoid the phenomenon of poor stop to occur, reach good braking effect.Critical component in above-mentioned two patents is spring bag card, and because spring bag card shape matching is special, processing technology is complicated, and yield rate is not high, also there is the problem of mounting process complexity in addition, has a great impact the quality of whole main brake valve.
Utility model content
In order to solve the problem, the utility model proposes a kind of Yangze river and Huai river secondary, three grades of cadence braking master valves.
The technical solution of the utility model is: a kind of Yangze river and Huai river two-stage cadence braking master valve, comprises the upper valve body be bolted together, lower valve body,
Described upper valve body upper end is provided with Middle face on pedal base, pedal base and is provided with opening, is provided with the cylindrical slide sleeve of upper end closed 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, is provided with the upper end that rotatable pinch roller is pressed in sliding sleeve in the middle part of pedal,
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 secondary points to stop dummy piston assembly, 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 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, be 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, 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 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 balance spring, and one-level balance spring to be supported under the lower surface of tip-lever support width dish and spring bag snap ring shape between flange upper surface; Secondary balance spring is provided with between spring bag card inwall and the step body of rod, 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 the upper surface of described spring bag card and width dish lower surface 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, be provided with push rod;
The top of described dummy piston body is provided with the edge turned up, and is provided with retracing spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge; The lower inner surface of the step dummy piston chamber in the outside face of dummy piston body and upper valve body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, is provided with seal ring in this circular groove;
The middle part of described upper valve body is upper valve member cavity, interlayer is provided with between the outside and upper valve body housing of upper valve member cavity, top and the dummy piston chamber of upper interlayer are through, upper valve member cavity sidepiece is provided with the enterprising gas port that level stretches out upper valve body housing, and the sidepiece of upper valve body is also provided with level and stretches out and the upper air extractor duct communicated with upper interlayer; The upper valve hole that inside flange is formed 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 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; Be bearing fit face between the outer wall of upper valve seat and the inwall of upper valve member cavity, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging at upper valve end respectively, between this flanging lower surface and upper surface of upper valve seat, be provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in valve hole and forms valve opening and closing structure, and the outer face of the annular protrusion of inner side and the body of rod chamber of dummy piston bottom forms valve and to exit on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, the vertical hollow rod body that relay piston comprises center and the piston body be connected to around the body of rod, 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 inwall of piston body and relay piston chamber is bearing fit face;
The top of lower valve body is lower valve assembly cavity, lower interlayer is provided with between the outside of lower valve assembly cavity and lower valve body housing, top and the lower piston chamber of lower interlayer are through, lower valve assembly cavity sidepiece is provided with the lower admission port that level stretches out lower valve body, and the sidepiece of lower valve body is also provided with level and stretches out and the lower air extractor duct communicated with lower interlayer; The lower valve hole that inside flange is formed 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 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 the lower valve seat of annular, 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; Be bearing fit face between the outer wall of lower valve seat and the inwall of lower valve assembly cavity, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging in lower valve end respectively, between this flanging lower surface and upper surface of lower valve seat, be 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, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in lower valve hole and forms lower valve on-off structure, and the annular protrusion of inner side and the hollow rod body lower end of relay piston form lower valve and to exit on-off structure;
Exhaust nozzle chamber is provided with in lower valve body lower portion, and being installed with exhaust nozzle by jump ring, this exhaust nozzle comprises 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 lower valve inside, is bearing fit face between the outer wall of inner core and the inwall of lower valve.
The external diameter of described secondary balance spring mates with the internal diameter of spring bag card, the internal diameter of described secondary balance spring and the diameter matches 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 outside first body of rod; 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.
A kind of Yangze river and Huai river three grades of cadence braking master valves, comprise the upper valve body be bolted together, lower valve body,
Described upper valve body upper end is provided with Middle face on pedal base, pedal base and is provided with opening, is provided with the cylindrical slide sleeve of upper end closed 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, is provided with the upper end that rotatable pinch roller is pressed in sliding sleeve in the middle part of pedal,
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, 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 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, be 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, 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 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 balance spring first, and balance spring first to be supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface; Balance spring second is provided with between spring bag card inwall and the step body of rod, 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; Balance spring the third is provided with in body of rod chamber,
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, the upper end of balance spring third is L2 to the distance between the 3rd body of rod lower surface, distance between the upper surface of described spring bag card and width dish lower surface 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 retracing spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge; The lower inner surface of the step dummy piston chamber in the outside face of dummy piston body and upper valve body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, is provided with seal ring in this circular groove;
The middle part of described upper valve body is upper valve member cavity, interlayer is provided with between the outside and upper valve body housing of upper valve member cavity, top and the dummy piston chamber of upper interlayer are through, upper valve member cavity sidepiece is provided with the enterprising gas port that level stretches out upper valve body housing, and the sidepiece of upper valve body is also provided with level and stretches out and the upper air extractor duct communicated with upper interlayer; The upper valve hole that inside flange is formed 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 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; Be bearing fit face between the outer wall of upper valve seat and the inwall of upper valve member cavity, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging at upper valve end respectively, between this flanging lower surface and upper surface of upper valve seat, be provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in valve hole and forms valve opening and closing structure, and the outer face of the annular protrusion of inner side and the body of rod chamber of dummy piston bottom forms valve and to exit on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, the vertical hollow rod body that relay piston comprises center and the piston body be connected to around the body of rod, 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 inwall of piston body and relay piston chamber is bearing fit face;
The top of lower valve body is lower valve assembly cavity, lower interlayer is provided with between the outside of lower valve assembly cavity and lower valve body housing, top and the lower piston chamber of lower interlayer are through, lower valve assembly cavity sidepiece is provided with the lower admission port that level stretches out lower valve body, and the sidepiece of lower valve body is also provided with level and stretches out and the lower air extractor duct communicated with lower interlayer; The lower valve hole that inside flange is formed 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 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 the lower valve seat of annular, 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; Be bearing fit face between the outer wall of lower valve seat and the inwall of lower valve assembly cavity, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging in lower valve end respectively, between this flanging lower surface and upper surface of lower valve seat, be 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, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in lower valve hole and forms lower valve on-off structure, and the annular protrusion of inner side and the hollow rod body lower end of relay piston form lower valve and to exit on-off structure;
Exhaust nozzle chamber is provided with in lower valve body lower portion, and being installed with exhaust nozzle by jump ring, this exhaust nozzle comprises 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 lower valve inside, is bearing fit face between the outer wall of inner core and the inwall of lower valve.
The external diameter of described balance spring second mates with the internal diameter of spring bag card, the internal diameter of described balance spring second and the diameter matches 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 outside first body of rod; 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 utility model is:
This Yangze river and Huai river secondary, three grades of cadence braking master valves, stop dummy piston and three grades of points of the secondary points of its inside is stopped the spring bag card of dummy piston assembly, adopt upper, annular in-flanges, the structure of lower annular flanging, simplify the structure of spring bag card, reduce difficulty of processing and assembly difficulty, can the qualification rate of significantly 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.
Accompanying drawing explanation
The cross-sectional view of this Yangze river and Huai river two-stage cadence braking master valve of Fig. 1;
The cross-sectional view of this Yangze river and Huai river of Fig. 2 three grades of cadence braking master valves;
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;
1. dust-proof cushions in figure, 2. exhaust nozzle, 3. jump ring, 4.O type circle, 5.O type circle, 6.O type circle, 7.O type circle, 8. bolt, 9. descend valve body, 10. upper valve body, 11. jump rings, 12.O type circle, 13.O type circle, 14. retracing springs, 15. bolts, 16. pedal bases, 17. push rods, 18. sliding sleeves, 19. dust protecting caps, 20. lower valve seats, 21. lower valves, 22. lower valve springs, 23.O type circle, 24. relay pistons, 25.O type circle, 26.O type circle, valve seat on 27., valve spring on 28., valve on 29., 30.O type circle, 31. one-level balance springs or balance spring first, 32. secondary balance springs or balance spring second, 33. spring bag cards, 34. dummy pistons, 35. jump rings, 36. tip-lever supports, 37. adjustment screws, 38. jam nuts, 39. pedals, 40. Anti-slip covers, 41. bearing pins, 42. flat gaskets, 43. spring cotters, 44. rollers, 45. bearing pins, 46. flat gaskets, 47. spring cotters, 48. balance springs third, 49. enterprising gas ports, air extractor duct on 50, 51. times admission ports, 52. 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: see Fig. 1,3, Fig. 5-8, a kind of Yangze river and Huai river two-stage cadence braking master valve, comprises the upper valve body be bolted together, lower valve body,
Described upper valve body upper end is provided with Middle face on pedal base, pedal base and is provided with opening, is provided with the cylindrical slide sleeve of upper end closed 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, is provided with the upper end that rotatable pinch roller is pressed in sliding sleeve in the middle part of pedal,
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 secondary points to stop dummy piston assembly, 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 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, be 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, 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 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 balance spring, and one-level balance spring to be supported under the lower surface of tip-lever support width dish and spring bag snap ring shape between flange upper surface; Secondary balance spring is provided with between spring bag card inwall and the step body of rod, 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 the upper surface of described spring bag card and width dish lower surface 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, be provided with push rod;
The top of described dummy piston body is provided with the edge turned up, and is provided with retracing spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge; The lower inner surface of the step dummy piston chamber in the outside face of dummy piston body and upper valve body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, is provided with seal ring in this circular groove;
The middle part of described upper valve body is upper valve member cavity, interlayer is provided with between the outside and upper valve body housing of upper valve member cavity, top and the dummy piston chamber of upper interlayer are through, upper valve member cavity sidepiece is provided with the enterprising gas port that level stretches out upper valve body housing, and the sidepiece of upper valve body is also provided with level and stretches out and the upper air extractor duct communicated with upper interlayer; The upper valve hole that inside flange is formed 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 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; Be bearing fit face between the outer wall of upper valve seat and the inwall of upper valve member cavity, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging at upper valve end respectively, between this flanging lower surface and upper surface of upper valve seat, be provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in valve hole and forms valve opening and closing structure, and the outer face of the annular protrusion of inner side and the body of rod chamber of dummy piston bottom forms valve and to exit on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, the vertical hollow rod body that relay piston comprises center and the piston body be connected to around the body of rod, 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 inwall of piston body and relay piston chamber is bearing fit face;
The top of lower valve body is lower valve assembly cavity, lower interlayer is provided with between the outside of lower valve assembly cavity and lower valve body housing, top and the lower piston chamber of lower interlayer are through, lower valve assembly cavity sidepiece is provided with the lower admission port that level stretches out lower valve body, and the sidepiece of lower valve body is also provided with level and stretches out and the lower air extractor duct communicated with lower interlayer; The lower valve hole that inside flange is formed 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 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 the lower valve seat of annular, 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; Be bearing fit face between the outer wall of lower valve seat and the inwall of lower valve assembly cavity, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging in lower valve end respectively, between this flanging lower surface and upper surface of lower valve seat, be 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, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in lower valve hole and forms lower valve on-off structure, and the annular protrusion of inner side and the hollow rod body lower end of relay piston form lower valve and to exit on-off structure;
Exhaust nozzle chamber is provided with in lower valve body lower portion, and being installed with exhaust nozzle by jump ring, this exhaust nozzle comprises 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 lower valve inside, is bearing fit face between the outer wall of inner core and the inwall of lower valve.
The external diameter of described secondary balance spring mates with the internal diameter of spring bag card, the internal diameter of described secondary balance spring and the diameter matches 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 outside first body of rod; 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, 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 secondary balance spring upper-end contact, then one-level balance spring and secondary balance spring co-operation;
In order to 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 this dummy piston assembly installs the lower surface that the lower flange of spring bag card is pressed onto width dish chamber by rear stage balance spring; First act on one-level balance spring when tip-lever support is descending like this, after the stroke of L1 completes, act on firsts and seconds balance spring more simultaneously, two spring its effects side by side, thus form twice buffering.
Another situation is exactly select the spring that just mates with spring bag card internal height of length as secondary balance spring, so just need not limit the rigidity of secondary balance spring, also can realize secondary buffer.
Embodiment two: see Fig. 2,4, a kind of Yangze river and Huai river three grades of cadence braking master valves in Fig. 5-8, figure, comprise the upper valve body be bolted together, lower valve body,
Described upper valve body upper end is provided with Middle face on pedal base, pedal base and is provided with opening, is provided with the cylindrical slide sleeve of upper end closed 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, is provided with the upper end that rotatable pinch roller is pressed in sliding sleeve in the middle part of pedal,
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, 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 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, be 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, 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 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 balance spring first, and balance spring first to be supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface; Balance spring second is provided with between spring bag card inwall and the step body of rod, 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; Balance spring the third is provided with in body of rod chamber,
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, the upper end of balance spring third is L2 to the distance between the 3rd body of rod lower surface, distance between the upper surface of described spring bag card and width dish lower surface 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 retracing spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge; The lower inner surface of the step dummy piston chamber in the outside face of dummy piston body and upper valve body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, is provided with seal ring in this circular groove;
The middle part of described upper valve body is upper valve member cavity, interlayer is provided with between the outside and upper valve body housing of upper valve member cavity, top and the dummy piston chamber of upper interlayer are through, upper valve member cavity sidepiece is provided with the enterprising gas port that level stretches out upper valve body housing, and the sidepiece of upper valve body is also provided with level and stretches out and the upper air extractor duct communicated with upper interlayer; The upper valve hole that inside flange is formed 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 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; Be bearing fit face between the outer wall of upper valve seat and the inwall of upper valve member cavity, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging at upper valve end respectively, between this flanging lower surface and upper surface of upper valve seat, be provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in valve hole and forms valve opening and closing structure, and the outer face of the annular protrusion of inner side and the body of rod chamber of dummy piston bottom forms valve and to exit on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, the vertical hollow rod body that relay piston comprises center and the piston body be connected to around the body of rod, 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 inwall of piston body and relay piston chamber is bearing fit face;
The top of lower valve body is lower valve assembly cavity, lower interlayer is provided with between the outside of lower valve assembly cavity and lower valve body housing, top and the lower piston chamber of lower interlayer are through, lower valve assembly cavity sidepiece is provided with the lower admission port that level stretches out lower valve body, and the sidepiece of lower valve body is also provided with level and stretches out and the lower air extractor duct communicated with lower interlayer; The lower valve hole that inside flange is formed 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 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 the lower valve seat of annular, 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; Be bearing fit face between the outer wall of lower valve seat and the inwall of lower valve assembly cavity, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging in lower valve end respectively, between this flanging lower surface and upper surface of lower valve seat, be 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, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in lower valve hole and forms lower valve on-off structure, and the annular protrusion of inner side and the hollow rod body lower end of relay piston form lower valve and to exit on-off structure;
Exhaust nozzle chamber is provided with in lower valve body lower portion, and being installed with exhaust nozzle by jump ring, this exhaust nozzle comprises 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 lower valve inside, is bearing fit face between the outer wall of inner core and the inwall of lower valve.
The external diameter of described balance spring second mates with the internal diameter of spring bag card, the internal diameter of described balance spring second and the diameter matches 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 outside first body of rod; 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 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 balance spring third, now balance spring third and the combined action of balance spring first, after its L2 stroke completes, first body of rod lower surface of tip-lever support and balance spring second upper-end contact, now balance spring first, balance spring third and balance spring second co-operation;
In order to 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 installs the lower surface that the lower flange of spring bag card is pressed onto width dish chamber by back balance spring first; First act on balance spring first when tip-lever support is descending like this, after the stroke of L2 completes, act on balance spring first, second, third more simultaneously, three spring its effects side by side.
Another situation is exactly select the spring that just mates with spring bag card internal height of length as balance spring second, so just need not limit the rigidity of balance spring second.
Claims (8)
1. a Yangze river and Huai river two-stage cadence braking master valve, comprises the upper valve body be bolted together, lower valve body,
Described upper valve body upper end is provided with Middle face on pedal base, pedal base and is provided with opening, is provided with the cylindrical slide sleeve of upper end closed 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, is provided with the upper end that rotatable pinch roller is pressed in sliding sleeve in the middle part of pedal,
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 secondary points to stop dummy piston assembly, 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 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, be 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, 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 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 balance spring, and one-level balance spring to be supported under the lower surface of tip-lever support width dish and spring bag snap ring shape between flange upper surface; Secondary balance spring is provided with between spring bag card inwall and the step body of rod, 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 the upper surface of described spring bag card and width dish lower surface 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, be provided with push rod;
The top of described dummy piston body is provided with the edge turned up, and is provided with retracing spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge; The lower inner surface of the step dummy piston chamber in the outside face of dummy piston body and upper valve body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, is provided with seal ring in this circular groove;
The middle part of described upper valve body is upper valve member cavity, interlayer is provided with between the outside and upper valve body housing of upper valve member cavity, top and the dummy piston chamber of upper interlayer are through, upper valve member cavity sidepiece is provided with the enterprising gas port that level stretches out upper valve body housing, and the sidepiece of upper valve body is also provided with level and stretches out and the upper air extractor duct communicated with upper interlayer; The upper valve hole that inside flange is formed 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 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; Be bearing fit face between the outer wall of upper valve seat and the inwall of upper valve member cavity, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging at upper valve end respectively, between this flanging lower surface and upper surface of upper valve seat, be provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in valve hole and forms valve opening and closing structure, and the outer face of the annular protrusion of inner side and the body of rod chamber of dummy piston bottom forms valve and to exit on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, the vertical hollow rod body that relay piston comprises center and the piston body be connected to around the body of rod, 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 inwall of piston body and relay piston chamber is bearing fit face;
The top of lower valve body is lower valve assembly cavity, lower interlayer is provided with between the outside of lower valve assembly cavity and lower valve body housing, top and the lower piston chamber of lower interlayer are through, lower valve assembly cavity sidepiece is provided with the lower admission port that level stretches out lower valve body, and the sidepiece of lower valve body is also provided with level and stretches out and the lower air extractor duct communicated with lower interlayer; The lower valve hole that inside flange is formed 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 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 the lower valve seat of annular, 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; Be bearing fit face between the outer wall of lower valve seat and the inwall of lower valve assembly cavity, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging in lower valve end respectively, between this flanging lower surface and upper surface of lower valve seat, be 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, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in lower valve hole and forms lower valve on-off structure, and the annular protrusion of inner side and the hollow rod body lower end of relay piston form lower valve and to exit on-off structure;
Exhaust nozzle chamber is provided with in lower valve body lower portion, and being installed with exhaust nozzle by jump ring, this exhaust nozzle comprises 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 lower valve inside, is bearing fit face between the outer wall of inner core and the inwall of lower valve.
2. Yangze river and Huai river two-stage cadence braking master valve 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, the internal diameter of described secondary balance spring and the diameter matches of second body of rod; The internal diameter of described one-level balance spring mates with the external diameter of spring bag card.
3. Yangze river and Huai river two-stage cadence braking master valve according to claim 1, 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.
4. Yangze river and Huai river two-stage cadence braking master valve according to claim 1, is characterized in that: the lower end of described exhaust nozzle is provided with dust-proof cushion.
5. Yangze river and Huai river three grades of cadence braking master valves, comprise the upper valve body be bolted together, lower valve body,
Described upper valve body upper end is provided with Middle face on pedal base, pedal base and is provided with opening, is provided with the cylindrical slide sleeve of upper end closed 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, is provided with the upper end that rotatable pinch roller is pressed in sliding sleeve in the middle part of pedal,
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, 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 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, be 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, 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 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 balance spring first, and balance spring first to be supported under the lower surface of tip-lever support width dish and spring bag card arc between flange upper surface; Balance spring second is provided with between spring bag card inwall and the step body of rod, 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; Balance spring the third is provided with in body of rod chamber,
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, the upper end of balance spring third is L2 to the distance between the 3rd body of rod lower surface, distance between the upper surface of described spring bag card and width dish lower surface 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 retracing spring first between the step of the step dummy piston chamber in the lower surface and upper valve body at this edge; The lower inner surface of the step dummy piston chamber in the outside face of dummy piston body and upper valve body is bearing fit face, and the bottom of the outside face of described dummy piston body is provided with circular groove, is provided with seal ring in this circular groove;
The middle part of described upper valve body is upper valve member cavity, interlayer is provided with between the outside and upper valve body housing of upper valve member cavity, top and the dummy piston chamber of upper interlayer are through, upper valve member cavity sidepiece is provided with the enterprising gas port that level stretches out upper valve body housing, and the sidepiece of upper valve body is also provided with level and stretches out and the upper air extractor duct communicated with upper interlayer; The upper valve hole that inside flange is formed 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 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; Be bearing fit face between the outer wall of upper valve seat and the inwall of upper valve member cavity, and be provided with hermetically-sealed construction; The upper end of described upper valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging at upper valve end respectively, between this flanging lower surface and upper surface of upper valve seat, be provided with valve spring; The upper surface of the annular disk body of upper valve upper end is provided with sealing gasket for valve, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in valve hole and forms valve opening and closing structure, and the outer face of the annular protrusion of inner side and the body of rod chamber of dummy piston bottom forms valve and to exit on-off structure;
Upper valve body bottom is relay piston chamber, relay piston chamber interior is provided with relay piston, the vertical hollow rod body that relay piston comprises center and the piston body be connected to around the body of rod, 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 inwall of piston body and relay piston chamber is bearing fit face;
The top of lower valve body is lower valve assembly cavity, lower interlayer is provided with between the outside of lower valve assembly cavity and lower valve body housing, top and the lower piston chamber of lower interlayer are through, lower valve assembly cavity sidepiece is provided with the lower admission port that level stretches out lower valve body, and the sidepiece of lower valve body is also provided with level and stretches out and the lower air extractor duct communicated with lower interlayer; The lower valve hole that inside flange is formed 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 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 the lower valve seat of annular, 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; Be bearing fit face between the outer wall of lower valve seat and the inwall of lower valve assembly cavity, and be provided with hermetically-sealed construction; The upper end of described lower valve is annular disk body, and inside and outside this annular disk body, both sides form in-flanges and flanging in lower valve end respectively, between this flanging lower surface and upper surface of lower valve seat, be 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, two annular protrusions are provided with at the upper surface of sealing pad, the annular protrusion in outside coordinates with the edge in lower valve hole and forms lower valve on-off structure, and the annular protrusion of inner side and the hollow rod body lower end of relay piston form lower valve and to exit on-off structure;
Exhaust nozzle chamber is provided with in lower valve body lower portion, and being installed with exhaust nozzle by jump ring, this exhaust nozzle comprises 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 lower valve inside, is bearing fit face between the outer wall of inner core and the inwall of lower valve.
6. Yangze river and Huai river according to claim 5 three grades of cadence braking master valves, is characterized in that: the external diameter of described balance spring second mates with the internal diameter of spring bag card, the internal diameter of described balance spring second and the diameter matches 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. Yangze river and Huai river according to claim 5 three grades of cadence braking master valves, 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.
8. Yangze river and Huai river according to claim 5 three grades of cadence braking master valves, is characterized in that: the lower end of described exhaust nozzle is provided with dust-proof cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420544394.2U CN204172891U (en) | 2014-09-22 | 2014-09-22 | Yangze river and Huai river secondary, three grades of cadence braking master valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420544394.2U CN204172891U (en) | 2014-09-22 | 2014-09-22 | Yangze river and Huai river secondary, three grades of cadence braking master valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204172891U true CN204172891U (en) | 2015-02-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420544394.2U Withdrawn - After Issue CN204172891U (en) | 2014-09-22 | 2014-09-22 | Yangze river and Huai river secondary, three grades of cadence braking master valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204172891U (en) |
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2014
- 2014-09-22 CN CN201420544394.2U patent/CN204172891U/en not_active Withdrawn - After Issue
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