CN104192132B - Two grades and three grades of cadence braking master valves - Google Patents
Two grades and three grades of cadence braking master valves Download PDFInfo
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- CN104192132B CN104192132B CN201410485433.0A CN201410485433A CN104192132B CN 104192132 B CN104192132 B CN 104192132B CN 201410485433 A CN201410485433 A CN 201410485433A CN 104192132 B CN104192132 B CN 104192132B
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Abstract
The invention discloses a kind of two grades and three grades of cadence braking master valves, including upper body and lower body, and tappet, plunger cap, piston and valve, it is set with dummy piston on the top of upper intracoelomic cavity, spring cutting ferrule outer cover is equipped with one-level balancing spring, and internal sleeve is equipped with two grades of balancing springs；Two grades of balancing spring upper ends are L1 to the distance of the step surface of the first body of rod lower end, the step surface of the second body of rod lower end is L3 to the distance of body of rod chamber upper surface, distance between upper surface and the width dish lower surface of spring cutting ferrule is L2, meets L1 ＜ L3 ＜ L2.The present invention uses upper, annular in-flanges, the structure of lower annular flanging, simplifies the structure of spring cutting ferrule, reduces difficulty of processing and assembly difficulty, it is possible to the significantly qualification rate of improving product.Spring cutting ferrule can pass through machining straight forming, it is also possible to carries out one-time formed processing by Sheet Metal Forming Technology, and the course of processing is simple, and the present invention can synchronize two piston components about driving by balanced lever, it is achieved Synchronization Control purpose.
Description
Technical field
The present invention relates to the parts technical field of brake valve of car, specifically one two grades and three grades of some brakings total
Valve.
Background technology
The brake system of truck of the prior art and heavy goods vehicles is too anxious, and the bad control of feel easily causes brake
Sheet heats up rapidly, causes carbonization, directly influences braking effect, and it is too urgent to brake, and also can cause sliding inclined, affect stability in the large,
Thus produce insecurity, or unnecessary economic loss.Problem during in order to solve these brakes of truck, our unit is successively
The two-stage cadence braking master valve proposed and the series of patents of three grades of dummy piston assemblies, such as Publication No. CN 101837774 A
Patent of invention, it is possible to output " secondary points is stopped "." point is stopped " principle can make compressed air, forms arteries and veins in controlling pipeline section and air chamber
Punching, is applied to brake block, and every subpulse is all equivalent to brake block of instrument wiping.Be not only able to accomplish brake hubs with
Brake block combines effectively, and largely further improves brake block carbonization or form adamantine layer, thus avoids poor stop
Phenomenon occur, reach good braking effect.Critical component in above-mentioned patent is spring cutting ferrule, due to spring cutting ferrule shape
The most special, processing technique is complicated, needs polish on lathe after casting, and cost is higher.The precision size of this spring cutting ferrule
Require height, the highest through inspection defect rate after manufacture.Further, since each parts conformability is poor, there is also mounting process complexity
Problem, after installation, test performance is different, and systematicness is poor, haves much room for improvement.
Summary of the invention
In order to solve the problems referred to above that existing some braking system exists, the present invention proposes a kind of for the two of prestige series difficult to understand
Level and three grades of cadence braking master valves, reach to simplify structure, reduce cost purpose, also by arranging speed bump to improve braking
Effect.
The technical scheme is that a kind of two-stage cadence braking master valve, including upper body and lower body, and tappet, tappet
Seat, piston and valve, on upper body, middle side part is provided with inner chamber, is set with dummy piston in inner chamber, and by circlip pair
Dummy piston positions；The top of dummy piston is columnar width dish chamber A, the cavity shape that the bottom of dummy piston is stretched out
Projection is body of rod chamber B；The top of described plunger cap is width dish, and bottom is attenuate successively the three sections of steps stretched out from width dish
The body of rod, is followed successively by first body of rod, second body of rod and the 3rd body of rod from top to down, and the hypomere of the 3rd body of rod inserts dummy piston bottom
Body of rod chamber B in, in the width dish chamber A that width dish is arranged in dummy piston by jump ring；The lower end of described tappet and tappet
Mutually compressing bottom the central pit hole of seat, have torque arm in side, upper body by hinge, one end of torque arm is crimped on plunger cap
Upper end, is sealed and installed with dirt-proof boot between plunger cap upper end and upper end, upper body inner chamber outer rim simultaneously；Spring cutting ferrule is cylindrical shape
Structure, is positioned in the width dish chamber A of dummy piston, and the upper end of spring cutting ferrule is inwardly provided with and continuous print annular upper overturning, lower end
It is provided with flange outwards and under continuous print annular；Spring cutting ferrule outer cover is supported on equipped with one-level balancing spring, one-level balancing spring
Under the lower surface of plunger cap width dish and Spring Card collar-shaped between flange upper surface；Spring cutting ferrule internal sleeve is equipped with two grades of equilibrium bombs
Spring, the lower end of two grades of balancing springs is supported on the lower surface of dummy piston width dish chamber A, outside the upper end of two grades of balancing springs
Footpath is more than annular upper overturning internal diameter, and annular upper overturning internal diameter is more than or equal to the diameter of first body of rod, the upper end of two grades of balancing springs
Internal diameter less than the diameter of first body of rod；The coefficient of elasticity of one-level balancing spring is more than the coefficient of elasticity of two grades of balancing springs；Two
Level balancing spring upper end is L1 to the distance of the step surface of the first body of rod lower end, and the step surface of the second body of rod lower end is to body of rod chamber
The distance of B upper surface is L3, and the distance between upper surface and the width dish lower surface of described spring cutting ferrule is L2, L1 ＜ L3 ＜
L2；The external diameter of two grades of described balancing springs mates with the internal diameter of spring cutting ferrule, the internal diameter of two grades of described balancing springs and
The diameter matches of bipole body；The internal diameter of described one-level balancing spring mates with the external diameter of spring cutting ferrule；At the bottom of the inner chamber of upper body
Portion is provided with balanced lever, and the upper end center of this balanced lever is provided with groove and is provided with steel ball in groove, described balance
The bottom of piston is docked with this steel ball coupling；Arranged on left and right sides at lower body is respectively arranged with left valve group and right valve group, and
Left air inlet and left gas outlet, right air inlet and right gas outlet；The bottom, two ends of described balanced lever respectively connect have left thimble and
Right thimble, left thimble and right thimble and bottom are respectively fixed with left piston and right piston, left piston and right piston and lay respectively at a left side
On the upside of valve member and on the upside of right valve member, and left piston and right piston are connected with lower body by back-moving spring respectively.
Described left valve member and right valve member include valve seat, valve and valve spring respectively, on left thimble and top
Being provided with air inlet, left piston and right piston in the middle part of pin is hollow structure, and left valve and right valve are hollow structure, and connect successively
Lead in valve seat center, at the centrally disposed air vent of valve seat and be provided with dust-proof cushion.
A kind of three grades of cadence braking master valves, including upper body and lower body, and tappet, plunger cap, piston and valve, in upper body
Upper middle side part is provided with inner chamber, is set with dummy piston, and is positioned dummy piston by circlip in inner chamber；Balance
The top of piston is columnar width dish chamber A, and the cavity shape projection that the bottom of dummy piston is stretched out is body of rod chamber B；Described
The top of plunger cap be width dish, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, is followed successively by from top to down
First body of rod, second body of rod and the 3rd body of rod, the hypomere of the 3rd body of rod inserts in the body of rod chamber B of dummy piston bottom, width dish
By in the width dish chamber A that jump ring is arranged in dummy piston；Spring cutting ferrule is columnar structured, is positioned at the width dish of dummy piston
In chamber A, the upper end of spring cutting ferrule is inwardly provided with and continuous print annular upper overturning, and lower end is outwards provided with and turns under continuous print annular
Limit；Spring cutting ferrule outer cover is equipped with one-level balancing spring, and one-level balancing spring is supported on lower surface and the spring of plunger cap width dish
Under card collar-shaped between flange upper surface；Spring cutting ferrule internal sleeve is propped up equipped with two grades of balancing springs, the lower end of two grades of balancing springs
Support is on the lower surface of dummy piston width dish chamber A, and the external diameter of the upper end of two grades of balancing springs is more than annular upper overturning internal diameter, ring
Shape upper overturning internal diameter is more than or equal to the diameter of first body of rod, and the internal diameter of the upper end of two grades of balancing springs is straight less than first body of rod
Footpath；The coefficient of elasticity of one-level balancing spring is more than the coefficient of elasticity of two grades of balancing springs；Three grades of balances it are provided with in body of rod chamber B
Spring, the distance of two grades of balancing spring upper ends to the step surface of the first body of rod lower end is L1, and the step surface of the second body of rod lower end arrives
The distance of body of rod chamber B upper surface is L3, and the distance between the upper end of three grades of balancing springs to the 3rd body of rod lower surface is L4, institute
Distance between upper surface and the width dish lower surface of the spring cutting ferrule stated is L2, L1 ＜ L4 ＜ L3 ＜ L2；Two grades of described balances
The external diameter of spring mates with the internal diameter of spring cutting ferrule, the internal diameter of two grades of described balancing springs and the diameter matches of second body of rod；
The internal diameter of described one-level balancing spring mates with the external diameter of spring cutting ferrule；Intracavity bottom in upper body is provided with balanced lever,
The upper end center of this balanced lever is provided with groove and is provided with steel ball in groove, the bottom of described dummy piston and this steel ball
Coupling docking；Arranged on left and right sides at lower body is respectively arranged with left valve group and right valve group, and gives vent to anger in left air inlet and a left side
Mouth, right air inlet and right gas outlet；The bottom, two ends of described balanced lever respectively connects left thimble and right thimble, left thimble and the right side
Thimble and bottom are respectively fixed with left piston and right piston, left piston and right piston and lay respectively on the upside of left valve member and right valve
On the upside of door assembly, and left piston and right piston are connected with lower body by back-moving spring respectively.
Described left valve member and right valve member include valve seat, valve and valve spring respectively, on left thimble and top
Being provided with air inlet, left piston and right piston in the middle part of pin is hollow structure, and left valve and right valve are hollow structure, and connect successively
Lead in valve seat center, at the centrally disposed air vent of valve seat and be provided with dust-proof cushion.
The solution have the advantages that:
1, the present invention is for the spring cutting ferrule of two grades and three grades cadence braking master valves of prestige series difficult to understand, uses upper, annular even
Continuous in-flanges, the structure of the continuous flanging of lower annular, simplify the structure of spring cutting ferrule, make difficulty of processing be substantially reduced, energy
The qualification rate of enough significantly improving products.
2, in the present invention, spring cutting ferrule can pass through machining straight forming, it is also possible to is carried out once by Sheet Metal Forming Technology
The processing of molding, the course of processing is simple, reduction cost to less than 1/10th of original paper, simultaneously the spring peace within spring cutting ferrule
Fill many simplest.
3, in the present invention, one-level spring has precompressed effect, and two-level spring has a balanced action, and and the bullet of spring
Property coefficient is more than the coefficient of elasticity of two-level spring, and pressure increases the most step by step, reaches the most handling.
4, the present invention can synchronize two piston components about driving by balanced lever, it is achieved Synchronization Control purpose.
Accompanying drawing explanation
Fig. 1 is two-stage cadence braking master valve structural representation of the present invention；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is that secondary points is stopped dummy piston assembly structure schematic diagram；
Fig. 4 is the main TV structure schematic diagram of spring cutting ferrule；
Fig. 5 is the cross-sectional view of dummy piston；
Fig. 6 is the A-A cross-sectional view of Fig. 4；
Fig. 7 is the main TV structure schematic diagram of plunger cap；
Fig. 8 is the B-B cross-sectional view of Fig. 7；
Fig. 9 is three grades of cadence braking master valve structural representations of the present invention；
Figure 10 is that three grades of points in Fig. 9 are stopped dummy piston assembly structure schematic diagram.
In figure: 1. the dust-proof cushion 2. valve seat 3.O type circle 4. planar sealing pad 5.O left valve of type circle 6. valve spring 7.
Door 8. left piston 9. back-moving spring 10.O type circle 11. circlip 12. lower body 13. thimble 14. steel balls 15. balance
Lever 16. upper body 17. adjusts bolt 18. locking nut 19. bearing pin 20. plain washer 21. split pin 22. torque arm 23.
Bolt 24. pad 29. tappet 32. dirt-proof boot 37. dummy piston 38. plunger cap 39. one-level spring (pre-compressed spring) 40.
Two-level spring (balancing spring) 41. cutting ferrule 53. circlip.
3801. width dishes, 3802. annular grooves, 3803. first bodies of rod, 3804. second bodies of rod, 3805. the 3rd bodies of rod,
The lower flange of 4001. annular upper overturnings, 4002. annulars.
Detailed description of the invention
Embodiment 1: a kind of two-stage cadence braking master valve, sees Fig. 1 and Fig. 2, including upper body and lower body, and tappet, very
Pole socket, piston and valve etc..
On upper body, middle side part is provided with inner chamber, is set with dummy piston, and is lived balance by circlip in inner chamber
Fill in row location；The top of dummy piston is columnar width dish chamber A, and the cavity shape projection that the bottom of dummy piston is stretched out is
Body of rod chamber B；
Seeing Fig. 4, the top of dummy piston is columnar width dish chamber A, the cavity shape that the bottom of dummy piston is stretched out
Projection is body of rod chamber B.
Seeing Fig. 7 and Fig. 8, the top of plunger cap 38 is width dish 3801, and bottom is to attenuate successively from what width dish 3801 stretched out
Three sections of step bodies of rod, be followed successively by first body of rod 3803, second body of rod 3804 and the 3rd body of rod 3805, the 3rd body of rod from top to down
The hypomere of 3805 inserts in the body of rod chamber B of dummy piston 37 bottom, and the upper end of width dish 3801 is sleeved on balance by jump ring 53
In width dish chamber A in piston 37.
Seeing Fig. 5 and Fig. 6, spring cutting ferrule 40 is columnar structured, is positioned in the width dish chamber A of dummy piston 37, spring
The upper end of cutting ferrule 40 is inwardly provided with and continuous print annular upper overturning 4001, and lower end is outwards provided with and flange under continuous print annular
4002。
Fig. 3 is the structure chart of two-stage cadence braking master valve, and spring cutting ferrule 40 outer cover is equipped with one-level balancing spring 39, one-level
Balancing spring 39 be supported under width dish 3801 lower surface of plunger cap 38 and the annular of spring cutting ferrule 40 flange 4002 upper surface it
Between；Spring cutting ferrule 40 internal sleeve is supported on dummy piston 37 equipped with two grades of balancing springs 41, the lower end of two grades of balancing springs 41
On the lower surface of width dish chamber A, the external diameter of two grades of balancing spring 41 upper ends, more than the internal diameter of annular upper overturning 4001, annular is turned over
The internal diameter on limit 4001 is less than first body of rod more than or equal to the diameter of first body of rod 3803, the internal diameter of two grades of balancing spring 41 upper ends
The diameter of 3803；The coefficient of elasticity of one-level balancing spring 39 is more than the coefficient of elasticity of two grades of balancing springs 41；Two grades of balancing springs
The upper end of 41 is L1 to the distance of the step surface of the first body of rod 3803 lower end, and the step surface of the second body of rod 3804 lower end is to body of rod chamber
The distance of B upper surface, room is L3, and the distance between upper surface and the lower surface of width dish 3801 of described spring cutting ferrule 40 is L2,
Meet L1 ＜ L3 ＜ L2.
Further, the external diameter of two grades of balancing springs 41 mates with the internal diameter of spring cutting ferrule 40, the internal diameter of two grades of balancing springs 41
Diameter matches with second body of rod 3804；The internal diameter of described one-level balancing spring 39 mates with the external diameter of spring cutting ferrule 40；Institute
The lower end stating tappet 29 mutually compresses bottom the central pit hole of plunger cap 38.
Seeing Fig. 1, the intracavity bottom in upper body is provided with balanced lever, and the upper end center of this balanced lever is provided with groove
And steel ball is installed in groove, the bottom of described dummy piston is docked with this steel ball coupling；Arranged on left and right sides difference at lower body
It is provided with left valve group and right valve group, and left air inlet and left gas outlet, right air inlet and right gas outlet；Described balance bar
The bottom, two ends of bar respectively connects has left thimble and right thimble, left thimble and right thimble and bottom to be respectively fixed with left piston and right work
Plug, left piston and right piston lay respectively on the upside of left valve member and on the upside of right valve member, and left piston and right piston divide
Tong Guo not be connected with lower body by back-moving spring.
Described left valve member and right valve member include valve seat, valve and valve spring respectively, on left thimble and top
Being provided with air inlet, left piston and right piston in the middle part of pin is hollow structure, and left valve and right valve are hollow structure, and connect successively
Lead in valve seat center, at the centrally disposed air vent of valve seat and be provided with dust-proof cushion.
Embodiment 2: a kind of three grades of cadence braking master valves, content is substantially the same manner as Example 1, is a difference in that: see figure
9, dummy piston unit replacement of secondary points being stopped is that three grades of points are stopped dummy piston assembly.Seeing Figure 10, these three grades of points are stopped to balance and are lived
Plug assembly includes dummy piston 37, spring cutting ferrule 40, plunger cap 38, and the top of dummy piston 37 is columnar width dish chamber A,
The cavity shape projection that the bottom of dummy piston 37 is stretched out is body of rod chamber B；The top of described plunger cap 38 is width dish, and bottom is
Attenuate successively the three sections of step bodies of rod stretched out from width dish 3801, are followed successively by first body of rod 3803, second body of rod from top to down
3804, the 3rd body of rod 3805, the hypomere of the 3rd body of rod 3805 inserts in the body of rod chamber B of dummy piston 37 bottom, width dish 3801
By in the width dish 3801 chamber A that jump ring is sleeved in dummy piston 37；Described spring cutting ferrule 40 is columnar structured, is positioned at
Between the step body of rod and the inwall of dummy piston 37 width dish 3801 chamber A of plunger cap 38, the upper end of spring cutting ferrule 40 be provided with to
In and continuous print annular upper overturning 4001, lower end is provided with outwards and flange under continuous print annular；Spring cutting ferrule 40 outer cover equipped with
One-level balancing spring 39, one-level balancing spring 39 is supported on the lower surface of plunger cap 38 width dish 3801 and the annular of spring cutting ferrule 40
Between lower flange 4002 upper surface；It is provided with two grades of balancing springs between inwall and the step body of rod of plunger cap 38 of spring cutting ferrule 40
41, the lower end of two grades of balancing springs 41 is supported on the lower surface of dummy piston 37 width dish 3801 chamber A, two grades of balancing springs 41
The external diameter of upper end less than annular upper overturning 4001 diameter, straight more than or equal to first body of rod 3803 of annular upper overturning 4001 internal diameter
Footpath, the internal diameter of the upper end of two grades of balancing springs 41 is less than the diameter of first body of rod 3803；Three grades of balances it are provided with in body of rod chamber B
Spring,
Two grades of balancing spring 41 upper ends are L1 to the distance of the step surface of the first body of rod 3803 lower end, second body of rod 3804 times
The step surface of end is L3 to the distance of body of rod chamber B upper surface, and the upper end of three grades of balancing springs is to the 3rd body of rod 3805 lower surface
Between distance be L4, the distance between upper surface and width dish 3801 lower surface of described spring cutting ferrule 40 is L4, L1 ＜ L4
＜ L3 ＜ L2.If the distance of L2 is too short, then L3, L4 and L1 will be inoperative.
The external diameter of two grades of described balancing springs 41 mates with the internal diameter of spring cutting ferrule 40, two grades of described balancing springs 41
Internal diameter and the diameter matches of second body of rod 3804；The internal diameter of described one-level balancing spring 39 and the external diameter of spring cutting ferrule 40
Join.So one-level balancing spring 39 and two grades of balancing springs 41 all give axial location, it is to avoid its horizontal looseness, it is ensured that work
The stability made.
Described width dish 3801 lower surface is provided with annular groove outside first body of rod 3803；This annular groove width and bullet
The width coupling of the upper end of spring cutting ferrule 40.Annular groove is so set and can make more compact structure, reduce the height of whole assembly
Size
The circumferentially face, bottom of the outer surface of described dummy piston 37 is provided with the annular slot caved inward, this annular snap
Groove inner seal sleeve is equipped with sealing ring.Such that it is able to reduce the thickness bottom dummy piston 37, prevent from its casting process is formed carefully
Hole, the most still causes poorly sealed problem.
Work process:
Plunger cap 38 is the most descending, first acts on one-level balancing spring 39 so that it is with plunger cap 38
Descending and compress, after its stroke L1 completes, the 3rd body of rod 3805 lower end of plunger cap 38 contacts with three grades of balancing springs, this
Time three grades of balancing springs and one-level balancing spring 39 jointly act on, after its L4 stroke completes, first body of rod of plunger cap 38
3803 lower surfaces and two grades of balancing spring 41 upper-end contact, now 39, three grades of balancing springs of one-level balancing spring and two grades of balances
Spring 41 cooperation；
For further description structure herein, need to select suitable one-level balancing spring 39 and two grades of equilibrium bombs
Spring 41, the rigidity of described one-level balancing spring 39 is installed more than the rigidity of two grades of balancing springs 41, this dummy piston 37 assembly
The lower flange of spring cutting ferrule 40 is pressed onto the lower surface of width dish 3801 chamber A by rear stage balancing spring 39；So at plunger cap 38
First act on one-level balancing spring 39 time descending, after the stroke of L4 completes, simultaneously act on one-level balancing spring 39, two grades again
Balancing spring 41 and three grades of balancing spring its effects side by side.
Another situation is exactly that the spring selecting length just to mate with spring cutting ferrule 40 internal height is put down as two grades
Weighing apparatus spring 41, thus need not limit the rigidity of two grades of balancing springs 41.
Claims (4)
1. a two-stage cadence braking master valve, including upper body and lower body, and tappet, plunger cap, piston and valve, its feature
It is: on upper body, middle side part is provided with inner chamber inner chamber to be set with dummy piston, and by circlip, dummy piston is carried out
Location；The top of dummy piston is columnar width dish chamber A, and the cavity shape projection that the bottom of dummy piston is stretched out is body of rod chamber
Room B；The top of described plunger cap is width dish, and bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, from upper past
Under be followed successively by first body of rod, second body of rod and the 3rd body of rod, the hypomere of the 3rd body of rod inserts the body of rod chamber B of dummy piston bottom
In, in the width dish chamber A that width dish is arranged in dummy piston by jump ring；The lower end of described tappet and the central pit hole of plunger cap
Bottom mutually compresses, and has torque arm in side, upper body by hinge, and one end of torque arm is crimped on plunger cap upper end, simultaneously very
It is sealed and installed with dirt-proof boot between pole socket upper end and upper end, upper body inner chamber outer rim；Spring cutting ferrule is columnar structured, is positioned at balance
In the width dish chamber A of piston, the upper end of spring cutting ferrule is inwardly provided with and continuous print annular upper overturning, and lower end is provided with outside and continuous
Annular under flange；Spring cutting ferrule outer cover is equipped with one-level balancing spring, and one-level balancing spring is supported under plunger cap width dish
Under surface and Spring Card collar-shaped between flange upper surface；Spring cutting ferrule internal sleeve is equipped with two grades of balancing springs, two grades of equilibrium bombs
The lower end of spring is supported on the lower surface of dummy piston width dish chamber A, and the external diameter of the upper end of two grades of balancing springs is more than in annular
Flange internal diameter, annular upper overturning internal diameter is more than or equal to the diameter of first body of rod, and the internal diameter of the upper end of two grades of balancing springs is less than the
The diameter of one body of rod；The coefficient of elasticity of one-level balancing spring is more than the coefficient of elasticity of two grades of balancing springs；On two grades of balancing springs
The distance of step surface holding the first body of rod lower end is L1, the step surface of the second body of rod lower end to body of rod chamber B upper surface away from
From for L3, the distance between upper surface and the width dish lower surface of described spring cutting ferrule is L2, L1 ＜ L3 ＜ L2；Described two grades
The external diameter of balancing spring mates with the internal diameter of spring cutting ferrule, the internal diameter of two grades of described balancing springs and the diameter of second body of rod
Join；The internal diameter of described one-level balancing spring mates with the external diameter of spring cutting ferrule；Intracavity bottom in upper body is provided with balance bar
Bar, the upper end center of this balanced lever is provided with groove and is provided with steel ball in groove, the bottom of described dummy piston with should
Steel ball coupling docking；Arranged on left and right sides at lower body is respectively arranged with left valve group and right valve group, and left air inlet and a left side go out
QI KOU, right air inlet and right gas outlet；The bottom, two ends of described balanced lever respectively connects left thimble and right thimble, left thimble and
Right thimble and bottom are respectively fixed with left piston and right piston, left piston and right piston and lay respectively on the upside of left valve member and the right side
On the upside of valve member, and left piston and right piston are connected with lower body by back-moving spring respectively.
Two-stage cadence braking master valve the most according to claim 1, is characterized in that: described left valve member and right valve member
Including valve seat, valve and valve spring respectively, being provided with air inlet, left piston and right piston in the middle part of left thimble and thimble is
Hollow structure, left valve and right valve are hollow structure, and are sequentially communicated in valve seat center, in the centrally disposed aerofluxus of valve seat
Mouth is also provided with dust-proof cushion.
3. three grades of cadence braking master valves, including upper body and lower body, and tappet, plunger cap, piston and valve, its feature
It is: on upper body, middle side part is provided with inner chamber inner chamber to be set with dummy piston, and by circlip, dummy piston is carried out
Location；The top of dummy piston is columnar width dish chamber A, and the cavity shape projection that the bottom of dummy piston is stretched out is body of rod chamber
Room B；The top of described plunger cap is width dish, and bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish, from upper past
Under be followed successively by first body of rod, second body of rod and the 3rd body of rod, the hypomere of the 3rd body of rod inserts the body of rod chamber B of dummy piston bottom
In, in the width dish chamber A that width dish is arranged in dummy piston by jump ring；Spring cutting ferrule is columnar structured, is positioned at balance and lives
In the width dish chamber A of plug, the upper end of spring cutting ferrule is inwardly provided with and continuous print annular upper overturning, and lower end is outwards provided with and continuous print
The lower flange of annular；Spring cutting ferrule outer cover is supported on the following table of plunger cap width dish equipped with one-level balancing spring, one-level balancing spring
Under face and Spring Card collar-shaped between flange upper surface；Spring cutting ferrule internal sleeve is equipped with two grades of balancing springs, two grades of balancing springs
Lower end be supported on the lower surface of dummy piston width dish chamber A, the external diameter of the upper end of two grades of balancing springs is more than turning in annular
Limit internal diameter, annular upper overturning internal diameter is less than first more than or equal to the diameter of first body of rod, the internal diameter of the upper end of two grades of balancing springs
The diameter of the body of rod；The coefficient of elasticity of one-level balancing spring is more than the coefficient of elasticity of two grades of balancing springs；It is provided with in body of rod chamber B
Three grades of balancing springs, the distance of two grades of balancing spring upper ends to the step surface of the first body of rod lower end is L1, the second body of rod lower end
Step surface is L3 to the distance of body of rod chamber B upper surface, between the upper end of three grades of balancing springs to the 3rd body of rod lower surface away from
From for L4, the distance between upper surface and the width dish lower surface of described spring cutting ferrule is L2, L1 ＜ L4 ＜ L3 ＜ L2；Described
The external diameter of two grades of balancing springs mates with the internal diameter of spring cutting ferrule, the internal diameter of two grades of described balancing springs and second body of rod straight
Footpath is mated；The internal diameter of described one-level balancing spring mates with the external diameter of spring cutting ferrule；Intracavity bottom in upper body is provided with flat
Weighing apparatus lever, the upper end center of this balanced lever is provided with groove and is provided with steel ball in groove, the bottom of described dummy piston
Dock with this steel ball coupling；Arranged on left and right sides at lower body is respectively arranged with left valve group and right valve group, and left air inlet and
Left gas outlet, right air inlet and right gas outlet；The bottom, two ends of described balanced lever respectively connects left thimble and right thimble, left top
Pin and right thimble and bottom are respectively fixed with left piston and right piston, left piston and right piston and lay respectively on the upside of left valve member
On the upside of right valve member, and left piston and right piston are connected with lower body by back-moving spring respectively.
Three grades of cadence braking master valves the most according to claim 3, is characterized in that: described left valve member and right valve member
Including valve seat, valve and valve spring respectively, being provided with air inlet, left piston and right piston in the middle part of left thimble and thimble is
Hollow structure, left valve and right valve are hollow structure, and are sequentially communicated in valve seat center, in the centrally disposed aerofluxus of valve seat
Mouth is also provided with dust-proof cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410485433.0A CN104192132B (en) | 2014-09-22 | 2014-09-22 | Two grades and three grades of cadence braking master valves |
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| CN201410485433.0A CN104192132B (en) | 2014-09-22 | 2014-09-22 | Two grades and three grades of cadence braking master valves |
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| CN104192132A CN104192132A (en) | 2014-12-10 |
| CN104192132B true CN104192132B (en) | 2016-08-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2059545A (en) * | 1979-09-26 | 1981-04-23 | Aisin Seiki | Vehicle brake modulators |
| EP1595764A1 (en) * | 2004-05-11 | 2005-11-16 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Pressure-reducing valve |
| CN1944129A (en) * | 2006-09-22 | 2007-04-11 | 田青锋 | Double chamber parallel electromagnetic control secondary booster automobile brake general pump |
| CN101857019A (en) * | 2010-05-18 | 2010-10-13 | 河南昌通科技有限公司 | Two-stage stab-braking double-cavity parallel arrangement type brake master valve |
| CN204323319U (en) * | 2014-09-22 | 2015-05-13 | 昌通科技有限公司 | For secondary and three grades of cadence braking master valves of east wind 140 |
-
2014
- 2014-09-22 CN CN201410485433.0A patent/CN104192132B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2059545A (en) * | 1979-09-26 | 1981-04-23 | Aisin Seiki | Vehicle brake modulators |
| EP1595764A1 (en) * | 2004-05-11 | 2005-11-16 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Pressure-reducing valve |
| CN1944129A (en) * | 2006-09-22 | 2007-04-11 | 田青锋 | Double chamber parallel electromagnetic control secondary booster automobile brake general pump |
| CN101857019A (en) * | 2010-05-18 | 2010-10-13 | 河南昌通科技有限公司 | Two-stage stab-braking double-cavity parallel arrangement type brake master valve |
| CN204323319U (en) * | 2014-09-22 | 2015-05-13 | 昌通科技有限公司 | For secondary and three grades of cadence braking master valves of east wind 140 |
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| CN104192132A (en) | 2014-12-10 |
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