CN104401316A - Two-stage and three-stage snub brake main valve provided with filter screen for Dawei series - Google Patents
Two-stage and three-stage snub brake main valve provided with filter screen for Dawei series Download PDFInfo
- Publication number
- CN104401316A CN104401316A CN201410627775.1A CN201410627775A CN104401316A CN 104401316 A CN104401316 A CN 104401316A CN 201410627775 A CN201410627775 A CN 201410627775A CN 104401316 A CN104401316 A CN 104401316A
- Authority
- CN
- China
- Prior art keywords
- rack
- valve
- annular
- annular arrangement
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims description 66
- 238000005520 cutting process Methods 0.000 claims description 58
- 238000001914 filtration Methods 0.000 claims description 43
- 239000003351 stiffener Substances 0.000 claims description 33
- 239000004831 Hot glue Substances 0.000 claims description 18
- 239000000428 dust Substances 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 230000004913 activation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 1
- 229910001573 adamantine Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/04—Driver's valves
Abstract
The invention discloses a two-stage and three-stage snub brake main valve provided with a filter screen for Dawei series. The snub brake main valve comprises a pedal seat, an upper body and a lower body which are sealed and fixed together, wherein a balance piston sleeves the upper part of an inner cavity of the upper body; a first stage balance spring sleeves the outer part of a spring clamp sleeve, and a second stage balance spring sleeves the inner part of the spring clamp sleeve; an upper valve seat is clamped and fixed at the inner side of the wall of an upper valve by an elastic check ring, and a lower valve seat is clamped and fixed at the inner side of the wall of a lower valve by another elastic check ring. The filter screen of a valve core of a brake valve in the invention is simple in structure and convenient to install, and can be arranged outside the valve core of the brake valve, especially, the valve core of the brake main valve; the filter screen is directly arranged around the valve core, a solid shell carried in gas can be prevented from entering the valve core, so that the work reliability of the valve core is greatly improved; therefore, the brake accidents can be avoided.
Description
Technical field
The present invention relates to the parts technical field of brake valve of car, specifically a kind of band filter screen secondary for large prestige series and 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 series of patents of the two-stage cadence braking master valve that our unit successively proposes and three grades of dummy piston assemblies, such as publication number is the patent of invention of CN 101837774 A, can export " secondary points is stopped "." point is stopped " principle can make pressurized air, forms pulse, be applied to brake facing in the control gentle room of pipeline section, 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 patent is spring cutting ferrule, and because spring cutting ferrule shape matching is special, processing technology is complicated, and to need after casting fine limit work on lathe, cost is higher.The precision dimensional characteristic of this spring cutting ferrule is high, very high through inspection fraction defect after manufacture.In addition, because each part fits is poor, also there is the problem of mounting process complexity, after installing, test performance is different, and systematicness is poor, haves much room for improvement.
Generally all filter is provided with at present in the pipeline of brake system, for filtering the solid particle polluter with gas flowing in tracheae, thus ensure each brake component not by the impact of solid particle polluter, ensure the reliability of its work, but because filter is apart from spool distant of each valve, the gas after filtering can not be avoided before entering spool again by the solid particle pollution of other new generations, sometimes still there will be particulate matter and enter spool, affect the sealing of spool, cause the accident of gas leakage, need to propose new solution.
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 band filter screen secondary for large prestige series and three grades of cadence braking master valves, reaches with simplified structure, reduces costs and and improve the object of filter effect.
Technical scheme of the present invention is: a kind of two-stage cadence braking master valve for large prestige serial band filter screen, comprise pedal, pedal base, tappet and valve, and admission port and air extractor duct, comprise successively from top to bottom seal be fixed together pedal base, upper body and lower body, wherein, pedal base central upper portion is set with sliding sleeve, and the sealing of sliding sleeve inner chamber upper end also compresses mutually with tappet upper end, described pedal in pedal base side, pedal is provided with the bearing pin and flat gasket that coordinate with sliding sleeve upper end and compress by hinge, the top of intracoelomic cavity is set with dummy piston on described, and the upper end of dummy piston outwards arranges flange, is supported with retracing spring between this flange lower surface and upper body intracavity bottom, dummy piston upper end is docked with plunger cap inner chamber, and 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, the top of described plunger cap 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 and the 3rd body of rod from top to down, the hypomere of the 3rd body of rod inserts in the body of rod chamber B of dummy piston bottom, and width dish is arranged in the width dish chamber A in dummy piston by jump ring, described spring cutting ferrule is columnar structured, is arranged 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, and lower end is outwards provided with and flange under continuous print annular, spring cutting ferrule outer cover is equipped with one-level balance spring, and one-level balance spring to be supported 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 secondary balance spring, the lower end of secondary balance spring is supported on the lower surface of dummy piston width dish chamber A, the external diameter of the upper end of secondary balance spring is greater than annular upper overturning 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 secondary balance spring is less than the diameter of first body of rod, the elasticity modulus of one-level balance spring is greater than the elasticity modulus of secondary balance spring, 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 L3 to the distance of body of rod chamber B upper surface, distance between the upper surface of described spring cutting ferrule and width dish lower surface is L2, L1 < L3 < L2, the external diameter of described secondary balance spring mates with the internal diameter of spring cutting ferrule, 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 cutting ferrule, mutually compress bottom the lower end of described tappet and the central pit hole of plunger cap, the bottom of intracoelomic cavity is provided with the upper valve wall of annular on described, and the inner chamber of upper valve wall is communicated with upper air extractor duct, and the exocoel of upper valve wall is communicated with enterprising gas port, in upper valve wall inner chamber, sealing shroud is equipped with the upper valve of cylindrical shape and upper valve seat, the upper end of upper valve is provided with outward flanging and upper valve port force fit, be supported with spring between the downside of this outward flanging and upper valve seat, upper valve seat is fixed in the inner side of upper valve wall by circlip, upper valve core filtering net is set with inside upper valve wall, this upper valve core filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener between upper and lower annular arrangement end-rack, inside pillar stiffener or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, the annular arrangement end-rack on described top is connected with the upper sealing lip edge that ringwise cross-sectional plane is wedge shape, on this, the upper surface on sealing lip edge is high outside and low outside in the conical surface, for flexibly connecting between upper sealing lip edge and the annular arrangement end-rack on top, the annular arrangement end-rack of described bottom is connected with the lower seal edge that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge and bottom, in described lower intracoelomic cavity, be provided with the lower valve wall of annular, the inner chamber of lower valve wall is communicated with lower air extractor duct, and the exocoel of lower valve wall is communicated with lower admission port, in lower valve wall inner chamber, sealing shroud is equipped with lower valve and the lower valve seat of cylindrical shape, the upper end of lower valve is provided with outward flanging and lower valve mouth force fit, be supported with spring between the downside of this outward flanging and lower valve seat, lower valve seat is fixed in the inner side of lower valve wall by circlip, bottom spool filtering net is set with inside upper valve wall, this bottom spool filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener between upper and lower annular arrangement end-rack, inside pillar stiffener or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, the annular arrangement end-rack on described top is connected with the upper sealing lip edge that ringwise cross-sectional plane is wedge shape, on this, the upper surface on sealing lip edge is high outside and low outside in the conical surface, for flexibly connecting between upper sealing lip edge and the annular arrangement end-rack on top, the annular arrangement end-rack of described bottom is connected with the lower seal edge that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge and bottom, the inner chamber upper end of described relay piston is provided with admission port, and bottom the body of rod chamber B of dummy piston, be provided with exhausr port, this exhausr port is communicated with the admission port of relay piston upper end, in lower valve inner chamber lower end, sealing shroud is equipped with exhausr port, and this exhausr port center is provided with dust-proof cushion.Fix between sliding sleeve and pedal base and have dust protecting cap.The annular arrangement end-rack on described top, the annular arrangement end-rack of bottom, pillar stiffener, upper sealing lip edge, lower seal edge are the plastic material of integrated injection molding, described cylindrical filter net is stainless steel, the upper end of filtering net and the annular arrangement end-rack hot-melt adhesive paste on top, the lower end of filtering net and the annular arrangement end-rack hot-melt adhesive paste of bottom, the side of filtering net and pillar stiffener hot-melt adhesive paste.
The cross-sectional width of the connecting portion between described upper airtight edge and the annular end-rack on top is L1, the cross-sectional width L2 of the annular end-rack on top, and L1 is not more than 1/3 of L2; The cross-sectional width of the connecting portion between described lower airtight edge and the annular end-rack of bottom is L3, and the cross-sectional width L4 of the annular end-rack of bottom, L3 is not more than 1/3 of L4.
A kind of three grades of cadence braking master valves for large prestige serial band filter screen, comprise pedal, pedal base, tappet and valve, and air inlet and air extractor duct, comprise successively from top to bottom seal be fixed together pedal base, upper body and lower body, wherein, pedal base central upper portion is set with sliding sleeve, and the sealing of sliding sleeve inner chamber upper end also compresses mutually with tappet upper end, described pedal in pedal base side, pedal is provided with the bearing pin and flat gasket that coordinate with sliding sleeve upper end and compress by hinge, the top of intracoelomic cavity is set with dummy piston on described, and the upper end of dummy piston outwards arranges flange, is supported with retracing spring between this flange lower surface and upper body intracavity bottom, dummy piston upper end is docked with plunger cap inner chamber, and 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, the top of described plunger cap 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 and the 3rd body of rod from top to down, the hypomere of the 3rd body of rod inserts in the body of rod chamber B of dummy piston bottom, and width dish is arranged in the width dish chamber A in dummy piston by jump ring, described spring cutting ferrule is columnar structured, is arranged 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, and lower end is outwards provided with and flange under continuous print annular, spring cutting ferrule outer cover is equipped with one-level balance spring, and one-level balance spring to be supported 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 secondary balance spring, the lower end of secondary balance spring is supported on the lower surface of dummy piston width dish chamber A, the external diameter of the upper end of secondary balance spring is greater than annular upper overturning 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 secondary balance spring is less than the diameter of first body of rod, the elasticity modulus of one-level balance spring is greater than the elasticity modulus of secondary balance spring, three grades of balance springs are provided with in body of rod chamber B, 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 L3 to the distance of body of rod chamber B upper surface, the upper end of three grades of balance springs is L4 to the distance between the 3rd body of rod lower surface, distance between the upper surface of described spring cutting ferrule and width dish lower surface is L2, L1 < L4 < L3 < L2, the external diameter of described secondary balance spring mates with the internal diameter of spring cutting ferrule, 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 cutting ferrule, mutually compress bottom the lower end of described tappet and the central pit hole of plunger cap, the bottom of intracoelomic cavity is provided with the upper valve wall of annular on described, and the inner chamber of upper valve wall is communicated with upper air extractor duct, and the exocoel of upper valve wall is communicated with enterprising gas port, in upper valve wall inner chamber, sealing shroud is equipped with the upper valve of cylindrical shape and upper valve seat, the upper end of upper valve is provided with outward flanging and upper valve port force fit, be supported with spring between the downside of this outward flanging and upper valve seat, upper valve seat is fixed in the inner side of upper valve wall by circlip, upper valve core filtering net is set with inside upper valve wall, this upper valve core filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener between upper and lower annular arrangement end-rack, inside pillar stiffener or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, the annular arrangement end-rack on described top is connected with the upper sealing lip edge that ringwise cross-sectional plane is wedge shape, on this, the upper surface on sealing lip edge is high outside and low outside in the conical surface, for flexibly connecting between upper sealing lip edge and the annular arrangement end-rack on top, the annular arrangement end-rack of described bottom is connected with the lower seal edge that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge and bottom, in described lower intracoelomic cavity, be provided with the lower valve wall of annular, the inner chamber of lower valve wall is communicated with lower air extractor duct, and the exocoel of lower valve wall is communicated with lower admission port, in lower valve wall inner chamber, sealing shroud is equipped with lower valve and the lower valve seat of cylindrical shape, the upper end of lower valve is provided with outward flanging and lower valve mouth force fit, be supported with spring between the downside of this outward flanging and lower valve seat, lower valve seat is fixed in the inner side of lower valve wall by circlip, bottom spool filtering net is set with inside upper valve wall, this bottom spool filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener between upper and lower annular arrangement end-rack, inside pillar stiffener or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, the annular arrangement end-rack on described top is connected with the upper sealing lip edge that ringwise cross-sectional plane is wedge shape, on this, the upper surface on sealing lip edge is high outside and low outside in the conical surface, for flexibly connecting between upper sealing lip edge and the annular arrangement end-rack on top, the annular arrangement end-rack of described bottom is connected with the lower seal edge that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge and bottom, the inner chamber upper end of described relay piston is provided with admission port, and bottom the body of rod chamber B of dummy piston, be provided with exhausr port, this exhausr port is communicated with the admission port of relay piston upper end, in lower valve inner chamber lower end, sealing shroud is equipped with exhausr port, and this exhausr port center is provided with dust-proof cushion.Fix between sliding sleeve and pedal base and have dust protecting cap.The annular arrangement end-rack on described top, the annular arrangement end-rack of bottom, pillar stiffener, upper sealing lip edge, lower seal edge are the plastic material of integrated injection molding, described cylindrical filter net is stainless steel, the upper end of filtering net and the annular arrangement end-rack hot-melt adhesive paste on top, the lower end of filtering net and the annular arrangement end-rack hot-melt adhesive paste of bottom, the side of filtering net and pillar stiffener hot-melt adhesive paste.
The cross-sectional width of the connecting portion between described upper airtight edge and the annular end-rack on top is L1, the cross-sectional width L2 of the annular end-rack on top, and L1 is not more than 1/3 of L2; The cross-sectional width of the connecting portion between described lower airtight edge and the annular end-rack of bottom is L3, and the cross-sectional width L4 of the annular end-rack of bottom, L3 is not more than 1/3 of L4.
Technique effect of the present invention is:
1, the present invention is used for the band filter screen secondary of large prestige series and the spring cutting ferrule of three grades of cadence braking master valves, adopt the continuous in-flanges of upper, annular, the structure of the continuous flanging of lower annular, simplifies the structure of spring cutting ferrule, difficulty of processing is reduced greatly, can the qualification rate of significantly improving product.
2, in the present invention, spring cutting ferrule can pass through cutting straight forming, also one-time formed processing can be carried out by Sheet Metal Forming Technology, the course of processing is simple, reduces costs less than 1/10th to original paper, and the spring fitting of spring cutting ferrule inside is also simple many simultaneously.
3, in the present invention, brake activation valve spool filter screen structure is simple, easy for installation, the spool of the brake activation valve that can load particularly main brake valve is outside, directly filtering net is arranged on around spool, the solid housing carried in gas can be avoided to enter in spool, thus the functional reliability of significantly poppe tvalve core; Brake accident is avoided to occur.
Accompanying drawing explanation
Fig. 1 is two-stage cadence braking master valve structural representation of the present invention;
Fig. 2 is the birds-eye view of Fig. 1;
Fig. 3 is that secondary points is stopped dummy piston assembly structure schematic diagram;
Fig. 4 is the cross-sectional view of dummy piston;
Fig. 5 is the main TV structure schematic diagram of spring cutting ferrule;
Fig. 6 is the A-A cross-sectional view of Fig. 5;
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 the present invention's three grades of cadence braking master valve structural representations;
Figure 10 is that three grades of points in Fig. 9 are stopped dummy piston assembly structure schematic diagram;
Figure 11 is that the master of brake activation valve spool filtering net of the present invention looks cross-sectional view;
Figure 12 is the D-D cross-sectional view in Figure 11;
Figure 13 is the E portion structure for amplifying schematic diagram in Figure 11;
Figure 14 is the structural representation after Figure 13 stress deformation.
In figure on 1. dust-proof cushion 2. exhausr port 3. circlip 4.O type circle 5. valve seat 6.O type circle 7. lower valve seat 8. lower body 9. lower valve spring 10. relay piston 11.O type circle 12.O type circle 16. circlip 17.O type circle 18.O type circles 19. on valve seat 20. on valve spring 21.O type circle 22. retracing spring 23. bolt 24. upper body 28. pedal base 29. tappet 30. sliding sleeve 31. dust protecting cap 32. bolt 33.O type circle 34. lower valve 35.O type circle 36. valve 37. dummy piston 38. plunger cap 39. one-level balance spring (pre-compressed spring) 40. spring cutting ferrule 41. secondary balance spring 42. adjust screw 43. jam nut 44. pedal 45. slipmat 46. bearing pin 47. flat gasket 48. spring cotter 49. roller 50. bearing pin 51. flat gasket 52. spring cotter 53. elasticity backing pin, valve wall on 54., 55. lower valve walls, air extractor duct 58. auxilairy air intake 59. times admission ports 60. times air extractor ducts 61. 3 grades of balance spring 62. annular housings on 56. enterprising gas ports 57..701 is upper sealing lip edge, and 702 is the annular end-rack on top, and 703 is pillar stiffener, and 704 is filtering net, and 705 is the annular end-rack of bottom, and 706 is lower seal edge, and 701-1 is the upper surface on upper sealing edge.3801. width dishes, 3802. annular grooves, 3803. first bodies of rod, 3804. second bodies of rod, 3805. the 3rd bodies of rod, 4001. annular upper overturnings, the lower flange of 4002. annulars.
Detailed description of the invention
Embodiment 1: a kind of two-stage cadence braking master valve for large prestige serial band filter screen, see Fig. 1 and Fig. 2, comprises the pedal base 28, upper body 24 and lower body 8 etc. that seal and be fixed together from top to bottom successively.
Wherein, the top of pedal base 28 upwards extends to tubulose, and its center is set with sliding sleeve 30, between sliding sleeve 30 and pedal base 28, fix dust protecting cap 31.
Pedal 44 is hinged on the side of pedal base 28 by bearing pin 46, pedal 44 is provided with the bearing pin 50 and flat gasket 51 that coordinate with sliding sleeve 30 upper end and compress.
The inner chamber upper end of sliding sleeve 30 seals and mutually compresses with the upper end of tappet 29, mutually compresses bottom the lower end of tappet 29 and the central pit hole of plunger cap 39.
Be set with dummy piston 37 on the inner chamber top of upper body 24, the upper end of dummy piston 37 outwards arranges flange, is supported with retracing spring 22 between this flange lower surface and upper body intracavity bottom; Dummy piston 37 upper end and upper body are fixed together by the spacing back-up ring of annular, and the upper end of this spacing back-up ring is fixed on upper body inwall by circlip.
See Fig. 4, 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.
See Fig. 7 and Fig. 8, the top of plunger cap 38 is width dish 3801, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish 3801, be followed successively by first body of rod 3803, second body of rod 3804 and the 3rd body of rod 3805 from top to down, the hypomere of the 3rd body of rod 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 by jump ring 53 in the width dish chamber A in dummy piston 37.
See Fig. 5 and Fig. 6, spring cutting ferrule 40 is columnar structured, is arranged in the width dish chamber A of dummy piston 37, and the upper end of spring cutting ferrule 40 is inwardly provided with and continuous print annular upper overturning 4001, and lower end is outwards provided with and flange 4002 under continuous print annular.
Fig. 3 is the constructional drawing of two-stage cadence braking master valve, and spring cutting ferrule 40 outer cover is equipped with one-level balance spring 39, and one-level balance spring 39 to be supported under width dish 3801 lower surface of plunger cap 38 and the annular of spring cutting ferrule 40 between flange 4002 upper surface; Spring cutting ferrule 40 internal sleeve is equipped with secondary balance spring 41, the lower end of secondary balance spring 41 is supported on the lower surface of width dish chamber A of dummy piston 37, the external diameter of secondary balance spring 41 upper end is greater than the internal diameter of annular upper overturning 4001, the internal diameter of annular upper overturning 4001 is more than or equal to the diameter of first body of rod 3803, and the internal diameter of secondary balance spring 41 upper end is less than the diameter of first body of rod 3803; The elasticity modulus of one-level balance spring 39 is greater than the elasticity modulus of secondary balance spring 41; The upper end of secondary balance spring 41 is L1 to the distance of the step surface of the first body of rod 3803 lower end, the step surface of the second body of rod 3804 lower end is L3 to the distance of body of rod chamber B upper surface, distance between the upper surface of described spring cutting ferrule 40 and the lower surface of width dish 3801 is L2, meets L1 < L3 < L2.
Further, the external diameter of secondary balance spring 41 mates with the internal diameter of spring cutting ferrule 40, the internal diameter of secondary balance spring 41 and the diameter matches of second body of rod 3804; The internal diameter of described one-level balance spring 39 mates with the external diameter of spring cutting ferrule 40; Mutually compress bottom the lower end of described tappet 29 and the central pit hole of plunger cap 38.
See Fig. 1, be provided with the upper valve wall 54 of annular in the bottom of upper body 24 inner chamber, the inner chamber of upper valve wall 54 is communicated with upper air extractor duct 58, and the exocoel of upper valve wall 54 is communicated with enterprising gas port 57; In upper valve wall 54 inner chamber, sealing shroud is equipped with upper valve 36 and the upper valve seat 18 of cylindrical shape, the upper end of upper valve 36 is provided with outward flanging and upper valve port force fit, be supported with spring 20 between the downside of this outward flanging and upper valve seat 18, upper valve seat 18 is fixed in the inner side of upper valve wall 54 by circlip.
Be provided with the lower valve wall 55 of annular in the inner chamber of lower body 8, the inner chamber of lower valve wall 55 is communicated with lower air extractor duct 60, and the exocoel of lower valve wall 55 is communicated with lower admission port 59; In lower valve wall 55 inner chamber, sealing shroud is equipped with lower valve 34 and the lower valve seat 7 of cylindrical shape, the upper end of lower valve 34 is provided with outward flanging and lower valve mouth force fit, be supported with spring 9 between the downside of this outward flanging and lower valve seat 7, lower valve seat 7 is fixed in the inner side of lower valve wall 55 by circlip.
Be set with the relay piston 10 of hollow at the sealed bottom of upper body 13 inner chamber, the bottom of described dummy piston 37 controls upper valve member opening and closing, and the bottom of relay piston 10 controls the opening and closing of lower valve assembly.
The inner chamber upper end of the relay piston 10 in Fig. 1 is provided with admission port, and bottom the body of rod chamber B of dummy piston 37, be provided with exhausr port, this exhausr port is communicated with the admission port of relay piston 10 upper end; In lower valve 34 inner chamber lower end, sealing shroud is equipped with exhausr port 2, and this exhausr port 2 center is provided with dust-proof cushion 1.
Working process:
Plunger cap is first descending under external force, first to the effect of one-level balance spring, it is made to compress, after its stroke L1 completes with the descending of plunger cap, first body of rod lower surface of plunger cap 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 plunger cap 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.
Upper valve seat is fixed in the inner side of upper valve wall by circlip; Lower valve seat is fixed in the inner side of lower valve wall by circlip.See Figure 11-Figure 13, spool filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener 703 between upper and lower annular arrangement end-rack, inside pillar stiffener 703 or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, it is that the upper sealing lip of wedge shape is along 701 that the annular arrangement end-rack on described top is connected with ringwise cross-sectional plane, on this, sealing lip is high outside and low outside in the conical surface along the upper surface of 701, upper sealing lip along between 701 and the annular arrangement end-rack on top for flexibly connecting, the annular arrangement end-rack of described bottom is connected with the lower seal edge 706 that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge 706 is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge 706 and bottom.When this filtering net 704 is encased in the valve inner of brake activation valve, upper sealing lip along 701 and lower seal edge 706 under the pressure effect at upper and lower two ends, it flexibly connects and produces distortion, see Figure 14, the conical surface at the two ends after deformation closely can compress laminating with other parts, plays the effect of sealing, makes other can only pass through through filter screen, from two ends process, so just can not can shield particulate matter used.
The annular arrangement end-rack on described top, the annular arrangement end-rack of bottom, pillar stiffener 703, upper sealing lip along 701, lower seal edge 706 is the plastic material of integrated injection molding, described cylindrical filter net 704 is stainless steel, the upper end of filtering net 704 and the annular arrangement end-rack hot-melt adhesive paste on top, the lower end of filtering net 704 and the annular arrangement end-rack hot-melt adhesive paste of bottom, the side of filtering net 704 and pillar stiffener 703 hot-melt adhesive paste, injection mould one-shot forming can be passed through like this, part quality good stability, is convenient to the assembling in later stage.
The cross-sectional width of the connecting portion between described upper airtight edge and the annular end-rack 702 on top is L1, the cross-sectional width L2 of the annular end-rack 702 on top, and L1 is not more than 1/3 of L2; The cross-sectional width of the connecting portion between described lower airtight edge and the annular end-rack 705 of bottom is L3, the cross-sectional width L4 of the annular end-rack 705 of bottom, L3 is not more than 1/3 of L4, and the narrow sealing lip that is beneficial to of connecting portion is along being out of shape under pressure, more narrow better.
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 2: a kind of three grades of cadence braking master valves for large prestige serial band filter screen, content is substantially the same manner as Example 1, and difference is: see Figure 10, and dummy piston unit replacement of secondary points being stopped is that three grades of points are stopped dummy piston assembly.See Figure 11, these three grades of somes dummy piston assembly of stopping comprises dummy piston 37, spring cutting ferrule 40, plunger cap 38, and the top of dummy piston 37 is columnar width dish chamber A, and 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, bottom is attenuate successively the three sections of step bodies of rod stretched out from width dish 3801, be followed successively by first body of rod 3803, second body of rod 3804, the 3rd body of rod 3805 from top to down, the hypomere of the 3rd body of rod 3805 inserts in the body of rod chamber B of dummy piston 37 bottom, and width dish 3801 is sleeved in the width dish 3801 chamber A in dummy piston 37 by jump ring; Described spring cutting ferrule 40 is columnar structured, 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 is inwardly provided with and continuous print annular upper overturning 4001, and lower end is outwards provided with and flange under continuous print annular; Spring cutting ferrule 40 outer cover is equipped with one-level balance spring 39, and one-level balance spring 39 to be supported under the lower surface of plunger cap 38 width dish 3801 and the annular of spring cutting ferrule 40 between flange 4002 upper surface; Secondary balance spring 41 is provided with between the inwall of spring cutting ferrule 40 and the step body of rod of plunger cap 38, the lower end of secondary balance spring 41 is supported on the lower surface of dummy piston 37 width dish 3801 chamber A, the external diameter of the upper end of secondary balance spring 41 is less than annular upper overturning 4001 diameter, annular upper overturning 4001 internal diameter is more than or equal to the diameter of first body of rod 3803, and the internal diameter of the upper end of secondary balance spring 41 is less than the diameter of first body of rod 3803; Three grades of balance springs are provided with in body of rod chamber B,
Secondary balance spring 41 upper end is L1 to the distance of the step surface of the first body of rod 3803 lower end, the step surface of the second body of rod 3804 lower end is L3 to the distance of body of rod chamber B upper surface, the upper end of three grades of balance springs is L4 to the distance between the 3rd body of rod 3805 lower surface, distance between the upper surface of described spring cutting ferrule 40 and width dish 3801 lower surface 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 described secondary balance spring 41 mates with the internal diameter of spring cutting ferrule 40, the internal diameter of described secondary balance spring 41 and the diameter matches of second body of rod 3804; The internal diameter of described one-level balance spring 39 mates with the external diameter of spring cutting ferrule 40.Such one-level balance spring 39 and secondary balance spring 41 all give axial location, avoid its horizontal looseness, ensure the stability of work.
Described width dish 3801 lower surface is provided with annular groove outside first body of rod 3803; This annular groove width mates with the width of the upper end of spring cutting ferrule 40.Annular groove is set like this and can makes more compact structure, reduce the height dimension of whole assembly
The bottom of the outside face of described dummy piston 37 is circumferentially provided with the annular slot caved inward in face, and this annular slot inner seal sleeve is equipped with seal ring.Thus the thickness that can reduce bottom dummy piston 37, prevent from forming pore in its casting process, still cause poorly sealed problem after a polish.
Upper valve seat is fixed in the inner side of upper valve wall by circlip; Lower valve seat is fixed in the inner side of lower valve wall by circlip.See Figure 11-Figure 13, spool filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener 703 between upper and lower annular arrangement end-rack, inside pillar stiffener 703 or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, it is that the upper sealing lip of wedge shape is along 701 that the annular arrangement end-rack on described top is connected with ringwise cross-sectional plane, on this, sealing lip is high outside and low outside in the conical surface along the upper surface of 701, upper sealing lip along between 701 and the annular arrangement end-rack on top for flexibly connecting, the annular arrangement end-rack of described bottom is connected with the lower seal edge 706 that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge 706 is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge 706 and bottom.When this filtering net 704 is encased in the valve inner of brake activation valve, upper sealing lip along 701 and lower seal edge 706 under the pressure effect at upper and lower two ends, it flexibly connects and produces distortion, see Figure 14, the conical surface at the two ends after deformation closely can compress laminating with other parts, plays the effect of sealing, makes other can only pass through through filter screen, from two ends process, so just can not can shield particulate matter used.
The annular arrangement end-rack on described top, the annular arrangement end-rack of bottom, pillar stiffener 703, upper sealing lip along 701, lower seal edge 706 is the plastic material of integrated injection molding, described cylindrical filter net 704 is stainless steel, the upper end of filtering net 704 and the annular arrangement end-rack hot-melt adhesive paste on top, the lower end of filtering net 704 and the annular arrangement end-rack hot-melt adhesive paste of bottom, the side of filtering net 704 and pillar stiffener 703 hot-melt adhesive paste, injection mould one-shot forming can be passed through like this, part quality good stability, is convenient to the assembling in later stage.
The cross-sectional width of the connecting portion between described upper airtight edge and the annular end-rack 702 on top is L1, the cross-sectional width L2 of the annular end-rack 702 on top, and L1 is not more than 1/3 of L2; The cross-sectional width of the connecting portion between described lower airtight edge and the annular end-rack 705 of bottom is L3, the cross-sectional width L4 of the annular end-rack 705 of bottom, L3 is not more than 1/3 of L4, and the narrow sealing lip that is beneficial to of connecting portion is along being out of shape under pressure, more narrow better.
Working process:
Plunger cap 38 is first descending under external force, first one-level balance spring 39 is acted on, it is made to compress with the descending of plunger cap 38, after its stroke L1 completes, 3rd body of rod 3805 lower end of plunger cap 38 contacts with three grades of balance springs, now three grades of balance springs and one-level balance spring 39 combined action, after its L4 stroke completes, first body of rod 3803 lower surface of plunger cap 38 and secondary balance spring 41 upper-end contact, now one-level balance spring 39, three grades of balance springs and secondary balance spring 41 co-operation;
In order to further description structure herein, need to select suitable one-level balance spring 39 and secondary balance spring 41, the rigidity of described one-level balance spring 39 is greater than the rigidity of secondary balance spring 41, and this dummy piston 37 assembly installs the lower surface that the lower flange of spring cutting ferrule 40 is pressed onto width dish 3801 chamber A by rear stage balance spring 39; First act on one-level balance spring 39 when plunger cap 38 is descending like this, after the stroke of L4 completes, act on one-level balance spring 39, secondary balance spring 41 and three grades of balance spring its effects side by side more simultaneously.
Another situation is exactly select the spring that just mates with spring cutting ferrule 40 internal height of length as secondary balance spring 41, so just need not limit the rigidity of secondary balance spring 41.
Claims (10)
1. the two-stage cadence braking master valve for large prestige serial band filter screen, comprise comprise successively from top to bottom seal be fixed together pedal base, upper body and lower body, and pedal, tappet and valve, admission port and air extractor duct, it is characterized in that: pedal base central upper portion is set with sliding sleeve, the sealing of sliding sleeve inner chamber upper end also compresses mutually with tappet upper end, described pedal in pedal base side, pedal is provided with the bearing pin and flat gasket that coordinate with sliding sleeve upper end and compress by hinge, the top of intracoelomic cavity is set with dummy piston on described, and the upper end of dummy piston outwards arranges flange, is supported with retracing spring between this flange lower surface and upper body intracavity bottom, dummy piston upper end is docked with plunger cap inner chamber, and the top of dummy piston is columnar width dish chamber, and the cavity shape projection that the bottom of dummy piston is stretched out is body of rod chamber, the top of described plunger cap 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 and 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 bottom, and width dish is arranged in the width dish chamber in dummy piston by jump ring, described spring cutting ferrule is columnar structured, is arranged in the width dish chamber of dummy piston, and 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 flange under continuous print annular, spring cutting ferrule outer cover is equipped with one-level balance spring, and one-level balance spring to be supported 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 secondary balance spring, the lower end of secondary balance spring is supported on the lower surface of dummy piston width dish chamber, the external diameter of the upper end of secondary balance spring is greater than annular upper overturning 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 secondary balance spring is less than the diameter of first body of rod, the elasticity modulus of one-level balance spring is greater than the elasticity modulus of secondary balance spring, 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 L3 to the distance of body of rod chamber upper surface, distance between the upper surface of described spring cutting ferrule and width dish lower surface is L2, L1 < L3 < L2, the external diameter of described secondary balance spring mates with the internal diameter of spring cutting ferrule, 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 cutting ferrule, mutually compress bottom the lower end of described tappet and the central pit hole of plunger cap, the bottom of intracoelomic cavity is provided with the upper valve wall of annular on described, and the inner chamber of upper valve wall is communicated with upper air extractor duct, and the exocoel of upper valve wall is communicated with enterprising gas port, in upper valve wall inner chamber, sealing shroud is equipped with the upper valve of cylindrical shape and upper valve seat, the upper end of upper valve is provided with outward flanging and upper valve port force fit, be supported with spring between the downside of this outward flanging and upper valve seat, upper valve seat is fixed in the inner side of upper valve wall by circlip, upper valve core filtering net is set with inside upper valve wall, this upper valve core filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener between upper and lower annular arrangement end-rack, inside pillar stiffener or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, the annular arrangement end-rack on described top is connected with the upper sealing lip edge that ringwise cross-sectional plane is wedge shape, on this, the upper surface on sealing lip edge is high outside and low outside in the conical surface, for flexibly connecting between upper sealing lip edge and the annular arrangement end-rack on top, the annular arrangement end-rack of described bottom is connected with the lower seal edge that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge and bottom, in described lower intracoelomic cavity, be provided with the lower valve wall of annular, the inner chamber of lower valve wall is communicated with lower air extractor duct, and the exocoel of lower valve wall is communicated with lower admission port, in lower valve wall inner chamber, sealing shroud is equipped with lower valve and the lower valve seat of cylindrical shape, the upper end of lower valve is provided with outward flanging and lower valve mouth force fit, be supported with spring between the downside of this outward flanging and lower valve seat, lower valve seat is fixed in the inner side of lower valve wall by circlip, bottom spool filtering net is set with inside upper valve wall, this bottom spool filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener between upper and lower annular arrangement end-rack, inside pillar stiffener or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, the annular arrangement end-rack on described top is connected with the upper sealing lip edge that ringwise cross-sectional plane is wedge shape, on this, the upper surface on sealing lip edge is high outside and low outside in the conical surface, for flexibly connecting between upper sealing lip edge and the annular arrangement end-rack on top, the annular arrangement end-rack of described bottom is connected with the lower seal edge that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge and bottom, the relay piston of hollow is housed at described upper body intracavity bottom sealing shroud, and the bottom of described dummy piston controls upper valve member opening and closing, and the bottom of relay piston controls the opening and closing of lower valve assembly.
2. two-stage cadence braking master valve according to claim 1, is characterized in that: the inner chamber upper end of described relay piston is provided with admission port, and the body of rod cavity bottom of dummy piston is provided with exhausr port, and this exhausr port is communicated with the admission port of relay piston upper end; In lower valve inner chamber lower end, sealing shroud is equipped with exhausr port, and this exhausr port center is provided with dust-proof cushion.
3. two-stage cadence braking master valve according to claim 1, is characterized in that: fixing between sliding sleeve and pedal base has dust protecting cap.
4. two-stage cadence braking master valve according to claim 1, it is characterized in that: the annular arrangement end-rack on described top, the annular arrangement end-rack of bottom, pillar stiffener, upper sealing lip edge, lower seal edge are the plastic material of integrated injection molding, described cylindrical filter net is stainless steel, the upper end of filtering net and the annular arrangement end-rack hot-melt adhesive paste on top, the lower end of filtering net and the annular arrangement end-rack hot-melt adhesive paste of bottom, the side of filtering net and pillar stiffener hot-melt adhesive paste.
5. two-stage cadence braking master valve according to claim 1, is characterized in that: the cross-sectional width of the connecting portion between described upper airtight edge and the annular end-rack on top is L1, the cross-sectional width L2 of the annular end-rack on top, and L1 is not more than 1/3 of L2; The cross-sectional width of the connecting portion between described lower airtight edge and the annular end-rack of bottom is L3, and the cross-sectional width L4 of the annular end-rack of bottom, L3 is not more than 1/3 of L4.
6. three grades of cadence braking master valves for large prestige serial band filter screen, comprise comprise successively from top to bottom seal be fixed together pedal base, upper body and lower body, and pedal, tappet and valve, admission port and air extractor duct, it is characterized in that: pedal base central upper portion is set with sliding sleeve, the sealing of sliding sleeve inner chamber upper end also compresses mutually with tappet upper end, described pedal in pedal base side, pedal is provided with the bearing pin and flat gasket that coordinate with sliding sleeve upper end and compress by hinge, the top of intracoelomic cavity is set with dummy piston on described, and the upper end of dummy piston outwards arranges flange, is supported with retracing spring between this flange lower surface and upper body intracavity bottom, dummy piston upper end is docked with plunger cap inner chamber, and the top of dummy piston is columnar width dish chamber, and the cavity shape projection that the bottom of dummy piston is stretched out is body of rod chamber, the top of described plunger cap 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 and 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 bottom, and width dish is arranged in the width dish chamber in dummy piston by jump ring, described spring cutting ferrule is columnar structured, is arranged in the width dish chamber of dummy piston, and 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 flange under continuous print annular, spring cutting ferrule outer cover is equipped with one-level balance spring, and one-level balance spring to be supported 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 secondary balance spring, the lower end of secondary balance spring is supported on the lower surface of dummy piston width dish chamber, the external diameter of the upper end of secondary balance spring is greater than annular upper overturning 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 secondary balance spring is less than the diameter of first body of rod, the elasticity modulus of one-level balance spring is greater than the elasticity modulus of secondary balance spring, three grades of balance springs are provided with in body of rod chamber, 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 L3 to the distance of body of rod chamber upper surface, the upper end of three grades of balance springs is L4 to the distance between the 3rd body of rod lower surface, distance between the upper surface of described spring cutting ferrule and width dish lower surface is L2, L1 < L4 < L3 < L2, the external diameter of described secondary balance spring mates with the internal diameter of spring cutting ferrule, 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 cutting ferrule, mutually compress bottom the lower end of described tappet and the central pit hole of plunger cap, the bottom of intracoelomic cavity is provided with the upper valve wall of annular on described, and the inner chamber of upper valve wall is communicated with upper air extractor duct, and the exocoel of upper valve wall is communicated with enterprising gas port, in upper valve wall inner chamber, sealing shroud is equipped with the upper valve of cylindrical shape and upper valve seat, the upper end of upper valve is provided with outward flanging and upper valve port force fit, be supported with spring between the downside of this outward flanging and upper valve seat, upper valve seat is fixed in the inner side of upper valve wall by circlip, upper valve core filtering net is set with inside upper valve wall, this upper valve core filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener between upper and lower annular arrangement end-rack, inside pillar stiffener or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, the annular arrangement end-rack on described top is connected with the upper sealing lip edge that ringwise cross-sectional plane is wedge shape, on this, the upper surface on sealing lip edge is high outside and low outside in the conical surface, for flexibly connecting between upper sealing lip edge and the annular arrangement end-rack on top, the annular arrangement end-rack of described bottom is connected with the lower seal edge that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge and bottom, in described lower intracoelomic cavity, be provided with the lower valve wall of annular, the inner chamber of lower valve wall is communicated with lower air extractor duct, and the exocoel of lower valve wall is communicated with lower admission port, in lower valve wall inner chamber, sealing shroud is equipped with lower valve and the lower valve seat of cylindrical shape, the upper end of lower valve is provided with outward flanging and lower valve mouth force fit, be supported with spring between the downside of this outward flanging and lower valve seat, lower valve seat is fixed in the inner side of lower valve wall by circlip, bottom spool filtering net is set with inside upper valve wall, this bottom spool filtering net comprises the annular arrangement end-rack on top and the annular arrangement end-rack of bottom, be connected to the pillar stiffener between upper and lower annular arrangement end-rack, inside pillar stiffener or outside be provided with columnar filter screen, the upper end of this filter screen is connected with the circular end-rack on top, the lower end of this filter screen is connected with the annular arrangement end-rack of bottom, the annular arrangement end-rack on described top is connected with the upper sealing lip edge that ringwise cross-sectional plane is wedge shape, on this, the upper surface on sealing lip edge is high outside and low outside in the conical surface, for flexibly connecting between upper sealing lip edge and the annular arrangement end-rack on top, the annular arrangement end-rack of described bottom is connected with the lower seal edge that ringwise cross-sectional plane is wedge shape, and the lower surface at this lower seal edge is outer low and inner high in the conical surface, for flexibly connecting between the annular arrangement end-rack of lower seal edge and bottom, the relay piston of hollow is housed at described upper body intracavity bottom sealing shroud, and the bottom of described dummy piston controls upper valve member opening and closing, and the bottom of relay piston controls the opening and closing of lower valve assembly.
7. three grades of cadence braking master valves according to claim 6, it is characterized in that: the inner chamber upper end of described relay piston is provided with admission port, the body of rod cavity bottom of dummy piston is provided with exhausr port, and this exhausr port is communicated with the admission port of relay piston upper end; In lower valve inner chamber lower end, sealing shroud is equipped with exhausr port, and this exhausr port center is provided with dust-proof cushion.
8. three grades of cadence braking master valves according to claim 6, is characterized in that: fixing between sliding sleeve and pedal base has dust protecting cap.
9. three grades of cadence braking master valves according to claim 6, it is characterized in that: the annular arrangement end-rack on described top, the annular arrangement end-rack of bottom, pillar stiffener, upper sealing lip edge, lower seal edge are the plastic material of integrated injection molding, described cylindrical filter net is stainless steel, the upper end of filtering net and the annular arrangement end-rack hot-melt adhesive paste on top, the lower end of filtering net and the annular arrangement end-rack hot-melt adhesive paste of bottom, the side of filtering net and pillar stiffener hot-melt adhesive paste.
10. three grades of cadence braking master valves according to claim 6, is characterized in that: the cross-sectional width of the connecting portion between described upper airtight edge and the annular end-rack on top is L1, the cross-sectional width L2 of the annular end-rack on top, and L1 is not more than 1/3 of L2; The cross-sectional width of the connecting portion between described lower airtight edge and the annular end-rack of bottom is L3, and the cross-sectional width L4 of the annular end-rack of bottom, L3 is not more than 1/3 of L4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410627775.1A CN104401316B (en) | 2014-11-10 | 2014-11-10 | For two grades of the band filter screen and three-level cadence braking master valve of big prestige series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410627775.1A CN104401316B (en) | 2014-11-10 | 2014-11-10 | For two grades of the band filter screen and three-level cadence braking master valve of big prestige series |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104401316A true CN104401316A (en) | 2015-03-11 |
| CN104401316B CN104401316B (en) | 2017-07-07 |
Family
ID=52639009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410627775.1A Expired - Fee Related CN104401316B (en) | 2014-11-10 | 2014-11-10 | For two grades of the band filter screen and three-level cadence braking master valve of big prestige series |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104401316B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09164942A (en) * | 1995-12-15 | 1997-06-24 | Jidosha Kiki Co Ltd | Brake valve |
| JPH09175379A (en) * | 1995-12-28 | 1997-07-08 | Jidosha Kiki Co Ltd | Brake valve |
| DE19815599A1 (en) * | 1997-04-09 | 1998-10-22 | Aisin Seiki | Electromagnetic vehicle brake valve with coil and piston assemblies |
| CN2913111Y (en) * | 2006-07-12 | 2007-06-20 | 瑞立集团有限公司 | Multifunctional automobile braking valve |
| CN201511956U (en) * | 2009-08-12 | 2010-06-23 | 瑞立集团瑞安汽车零部件有限公司 | Groove-shaped structural master brake valve with filter |
| CN101837774A (en) * | 2010-05-31 | 2010-09-22 | 河南昌通科技有限公司 | Two-stage cadence braking master valve (type V) |
| CN201816582U (en) * | 2010-05-31 | 2011-05-04 | 河南昌通科技有限公司 | Secondary snub brake main valve |
| CN203920713U (en) * | 2013-12-27 | 2014-11-05 | 芜湖盛力科技股份有限公司 | Braking system of diesel engine of commercial vehicle list chamber Piston Pneumatic Brake Valve |
| CN204250025U (en) * | 2014-11-10 | 2015-04-08 | 昌通科技有限公司 | For band filter screen secondary and three grades of cadence braking master valves of large prestige series |
-
2014
- 2014-11-10 CN CN201410627775.1A patent/CN104401316B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09164942A (en) * | 1995-12-15 | 1997-06-24 | Jidosha Kiki Co Ltd | Brake valve |
| JPH09175379A (en) * | 1995-12-28 | 1997-07-08 | Jidosha Kiki Co Ltd | Brake valve |
| DE19815599A1 (en) * | 1997-04-09 | 1998-10-22 | Aisin Seiki | Electromagnetic vehicle brake valve with coil and piston assemblies |
| CN2913111Y (en) * | 2006-07-12 | 2007-06-20 | 瑞立集团有限公司 | Multifunctional automobile braking valve |
| CN201511956U (en) * | 2009-08-12 | 2010-06-23 | 瑞立集团瑞安汽车零部件有限公司 | Groove-shaped structural master brake valve with filter |
| CN101837774A (en) * | 2010-05-31 | 2010-09-22 | 河南昌通科技有限公司 | Two-stage cadence braking master valve (type V) |
| CN201816582U (en) * | 2010-05-31 | 2011-05-04 | 河南昌通科技有限公司 | Secondary snub brake main valve |
| CN203920713U (en) * | 2013-12-27 | 2014-11-05 | 芜湖盛力科技股份有限公司 | Braking system of diesel engine of commercial vehicle list chamber Piston Pneumatic Brake Valve |
| CN204250025U (en) * | 2014-11-10 | 2015-04-08 | 昌通科技有限公司 | For band filter screen secondary and three grades of cadence braking master valves of large prestige series |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104401316B (en) | 2017-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204250025U (en) | For band filter screen secondary and three grades of cadence braking master valves of large prestige series | |
| CN204250024U (en) | For large prestige serial band filter screen band retarder secondary and three grades of cadence braking master valves | |
| CN204250026U (en) | For band filter screen secondary and three grades of some braking structures of east wind 153 | |
| CN204250023U (en) | The secondary of moral dragon serial band filter screen and three grades of cadence braking master valves | |
| CN204250031U (en) | For prestige serial band filter screen band retarder secondary difficult to understand and three grades of cadence braking master valves | |
| CN204250029U (en) | For band filter screen five hole secondary and three grades of cadence braking master valves of moral dragon series | |
| CN204250027U (en) | The secondary of moral dragon serial band filter screen band retarder and three grades of cadence braking master valves | |
| CN204323318U (en) | For secondary and three grades of cadence braking master valves of large prestige series | |
| CN204250030U (en) | For band filter screen secondary and three grades of cadence braking master valves of prestige series difficult to understand | |
| CN204250028U (en) | For the secondary of east wind 140 with filter screen and three grades of cadence braking master valves | |
| CN204323323U (en) | For secondary and three grades of some braking structures of east wind 153 | |
| CN204172877U (en) | For secondary and three grades of cadence braking master valves of large prestige serial band retarder | |
| CN204172888U (en) | For secondary and three grades of cadence braking master valves of prestige series difficult to understand | |
| CN104401316A (en) | Two-stage and three-stage snub brake main valve provided with filter screen for Dawei series | |
| CN204172896U (en) | The secondary of moral dragon series and three grades of cadence braking master valves | |
| CN204323320U (en) | The secondary of moral dragon serial band retarder and three grades of cadence braking master valves | |
| CN104401313A (en) | Two-stage and three-stage snub brake main valve provided with filter screen and retarder for Dawei series | |
| CN204323322U (en) | For secondary and three grades of cadence braking master valves of prestige serial band retarder difficult to understand | |
| CN104386054A (en) | Two-stage snub braking structure and three-stage snub braking structure provided with filter screens and used on Dongfeng 153 | |
| CN104401314A (en) | Delong-series secondary and third snub brake master valve with filter mesh | |
| CN104401317A (en) | Five-hole two-stage and three-stage snub brake main valve provided with filter screen for Deron series | |
| CN204323321U (en) | For five hole secondarys and three grades of cadence braking master valves of moral dragon series | |
| CN104386053A (en) | Secondary and third snub braking main valve provided with filter screen and retarder and used for Aowei series | |
| CN104442788A (en) | Second-level and third-level inching braking master valve with filtering screen for Aowei series | |
| CN104401318A (en) | Delong-series secondary and third snub brake master valve with filter mesh and retarder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180508 Granted publication date: 20170707 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20200508 Granted publication date: 20170707 |
|
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20200508 Granted publication date: 20170707 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220508 Granted publication date: 20170707 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170707 Termination date: 20201110 |