CN104192131A - Delong-series second-stage main snub brake valve with retarder and Delong-series third-stage main snub brake valve with retarder - Google Patents
Delong-series second-stage main snub brake valve with retarder and Delong-series third-stage main snub brake valve with retarder Download PDFInfo
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- CN104192131A CN104192131A CN201410485423.7A CN201410485423A CN104192131A CN 104192131 A CN104192131 A CN 104192131A CN 201410485423 A CN201410485423 A CN 201410485423A CN 104192131 A CN104192131 A CN 104192131A
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Abstract
The invention discloses a Delong-series second-stage main snub brake valve with a retarder and a Delong-series third-stage main snub brake valve with a retarder. The Delong-series second-stage main snub brake valve comprises a pedal seat, an upper body, a middle body and a lower body, which are hermetically fixed together. A balance piston sleeves the upper portion of an inner cavity of the upper body, a first-stage balance spring is sleeved with the outer portion of a spring ferrule, and a second-stage balance spring is sleeved with the inside of the spring ferrule. The upper portion and the lower portion of the Delong-series second-stage main snub brake valve is provided with an inner annular flange and an outer annular flange respectively, the structure of the spring ferrule is simplified, processing and assembly difficulty is reduced, and yield of productions can be greatly increased. The retarder of the main snub brake valve is capable of improving brake effect and increasing brake speed, and when the retarder is combined with the snub brake structure, better brake effect is achieved.
Description
Technical field
The present invention relates to the parts technical field of brake valve of car, specifically a kind of secondary and three grades of cadence braking master valves of moral dragon serial band retarder.
Background technology
The brake system braking of truck of the prior art and heavy goods vehicles is too anxious, the bad control of feel, easily cause brake facing to heat up rapidly, cause carbonization, directly have influence on braking effect, it is too urgent to brake, also can cause partially sliding, affect resistance to overturning, thereby produce insecurity, or unnecessary economic loss.In order to solve these problem of truck in when brake, the secondary points braking structure that our unit successively proposes and the series of patents of three grades of dummy piston main valves, for example 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, in controlling the gentle chamber of pipeline section, forms pulse, is applied to brake facing, and every subpulse is all equivalent to brake facing of instrument wiping.Not only can accomplish the strong combination of brake hubs and brake facing, and also improved to a great extent brake facing carbonization or formed adamantine layer, thereby avoid the phenomenon of poor stop to occur, reach good braking effect.Critical component in above-mentioned patent is spring cutting ferrule, and because spring cutting ferrule shape matching is special, processing technology is complicated, needs after casting fine limit work on lathe, and cost is higher.The precision dimensional characteristic of this spring cutting ferrule is high, manufactures by check fraction defect very high.In addition, because each parts conformability is poor, also have the problem of mounting process complexity, after installing, test performance is different, and systematicness is poor, haves much room for improvement.
Summary of the invention
The problems referred to above that exist in order to solve existing some braking system, the present invention proposes a kind of moral serial secondary of dragon and three grades of some braking structures, reaches with simplified structure, reduces costs object, also by speed bump is set, improves braking effect.
Technical scheme of the present invention is: a kind of two-stage cadence braking master valve of moral dragon serial band retarder, comprise pedal, tappet and valve, and admission port and air extractor duct, comprise successively the upper body that sealing is fixed together from top to bottom, middle body and lower body, wherein, the top of upper body is tubular structure, on the top of upper body, inner chamber is set with dummy piston, the top inner chamber of upper body is also provided with the spacing back-up ring that prevents that dummy piston is ejected, the upper outside coupling of upper body is set with dust protecting cap, after the suit clip of dust protecting cap outside, be fixed on outside, upper body, dust protecting cap arranges centre hole and is provided with interlock groove at central hole location, the upper end of described dummy piston outwards arranges flange, between this flange lower surface and upper body intracavity bottom, is supported with retracing spring, the top of dummy piston is columnar width dish chamber A, and the cavity shape projection that stretch out the bottom of dummy piston is body of rod chamber B, the top of described plunger cap is width dish, the three section step bodies of rod successively attenuating of bottom for stretching out from width dish, be 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, 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 provided with inside and continuous annular upper overturning, and lower end is provided with flange under outside and continuous annular, spring cutting ferrule outer cover is equipped with one-level balance spring, and one-level balance spring is 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, and the internal diameter of described secondary balance spring mates with the diameter of second body of rod, the internal diameter of described one-level balance spring mates with the external diameter of spring cutting ferrule, the shrinkage pool bottom, center of the lower end of described tappet and plunger cap compresses mutually, 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 upper valve and the upper valve seat of cylindrical shape, the upper end of upper valve is provided with outward flanging and upper valve port force fit, between the downside of this outward flanging and upper valve seat, be supported with spring, upper valve seat fixes the inner side at upper valve wall by circlip, in described lower intracoelomic cavity, be provided with annular lower valve wall, 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, between the downside of this outward flanging and lower valve seat, be supported with spring, lower valve seat fixes the inner side at lower valve wall by circlip, the relay piston of hollow is housed at described middle body inner seal sleeve, and the bottom of described dummy piston is controlled upper valve member and is opened and closed, and the bottom of relay piston is controlled lower valve assembly and opened and closed, described relay piston is disposed with the first pipeline section, the second pipeline section and the 3rd pipeline section that diameter increases successively from top to bottom, wherein the first pipeline section external diameter and upper valve inner wall sealing are set with, the second pipeline section and middle body inner wall sealing suit, the 3rd pipeline section and lower body inner wall sealing suit, described middle body inwall is provided with ring-shaped air chamber, and be provided with auxilairy air intake in middle body one side, this auxilairy air intake is communicated with ring-shaped air chamber, the lower ending opening of described ring-shaped air chamber and with the step surface regional connectivity of described the second pipeline section and the 3rd pipeline section.The inner chamber upper end of described relay piston is provided with admission port, in the body of rod chamber B 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.Between sliding sleeve and pedal base, fix and have dust protecting cap.
A kind of three grades of cadence braking master valves of moral dragon serial band retarder, comprise pedal, tappet and valve, and admission port and air extractor duct, comprise successively the upper body that sealing is fixed together from top to bottom, middle body and lower body, wherein, the top of upper body is tubular structure, on the top of upper body, inner chamber is set with dummy piston, the top inner chamber of upper body is also provided with the spacing back-up ring that prevents that dummy piston is ejected, the upper outside coupling of upper body is set with dust protecting cap, after the suit clip of dust protecting cap outside, be fixed on outside, upper body, dust protecting cap arranges centre hole and is provided with interlock groove at central hole location, dock with plunger cap inner chamber dummy piston upper end, and the top of dummy piston is columnar width dish chamber A, and the cavity shape projection that stretch out the bottom of dummy piston is body of rod chamber B, the top of described plunger cap is width dish, the three section step bodies of rod successively attenuating of bottom for stretching out from width dish, be 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, 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 provided with inside and continuous annular upper overturning, and lower end is provided with flange under outside and continuous annular, spring cutting ferrule outer cover is equipped with one-level balance spring, and one-level balance spring is 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, in body of rod chamber B, be provided with three grades of balance springs, 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 three body of rod lower surfaces, upper end to the of three grades of balance springs is L4, 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, and the internal diameter of described secondary balance spring mates with the diameter of second body of rod, the internal diameter of described one-level balance spring mates with the external diameter of spring cutting ferrule, the shrinkage pool bottom, center of the lower end of described tappet and plunger cap compresses mutually, 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 upper valve and the upper valve seat of cylindrical shape, the upper end of upper valve is provided with outward flanging and upper valve port force fit, between the downside of this outward flanging and upper valve seat, be supported with spring, upper valve seat fixes the inner side at upper valve wall by circlip, in described lower intracoelomic cavity, be provided with annular lower valve wall, 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, between the downside of this outward flanging and lower valve seat, be supported with spring, lower valve seat fixes the inner side at lower valve wall by circlip, the relay piston of hollow is housed at described middle body inner seal sleeve, and the bottom of described dummy piston is controlled upper valve member and is opened and closed, and the bottom of relay piston is controlled lower valve assembly and opened and closed, described relay piston is disposed with the first pipeline section, the second pipeline section and the 3rd pipeline section that diameter increases successively from top to bottom, wherein the first pipeline section external diameter and upper valve inner wall sealing are set with, the second pipeline section and middle body inner wall sealing suit, the 3rd pipeline section and lower body inner wall sealing suit, described middle body inwall is provided with ring-shaped air chamber, and be provided with auxilairy air intake in middle body one side, this auxilairy air intake is communicated with ring-shaped air chamber, the lower ending opening of described ring-shaped air chamber and with the step surface regional connectivity of described the second pipeline section and the 3rd pipeline section.The inner chamber upper end of described relay piston is provided with admission port, in the body of rod chamber B 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.Between sliding sleeve and pedal base, fix and have dust protecting cap.
Technique effect of the present invention is:
1, the secondary of moral dragon series of the present invention and the spring cutting ferrule of three grades of some braking structures, adopt the continuous in-flanges of upper, annular, the structure of the continuous flanging of lower annular, has simplified the structure of spring cutting ferrule, difficulty of processing is reduced greatly, significantly the qualification rate of improving product.
2, medi-spring cutting ferrule of the present invention can pass through cutting straight forming, also can carry out one-time formed processing by Sheet Metal Forming Technology, the course of processing is simple, reduces costs to below 1/10th of original paper, and the spring fitting of spring cutting ferrule inside is also simple many simultaneously.
3, the retarder arranging in the present invention can improve braking effect, can adjustable brake speed, combine with above-mentioned some braking structure, and reach better braking effect.
Accompanying drawing explanation
Fig. 1 is band retarder secondary points braking structural representation of the present invention;
Fig. 2 is the cross-sectional view of spring cutting ferrule peace weighing apparatus Piston assembling;
Fig. 3 is the main TV structure schematic diagram of spring cutting ferrule;
Fig. 4 is the cross-sectional view of dummy piston;
Fig. 5 is the A-A cross-sectional view of Fig. 4;
Fig. 6 is the main TV structure schematic diagram of plunger cap;
Fig. 7 is the B-B cross-sectional view of Fig. 6;
Fig. 8 is relay piston structural representation;
Fig. 9 is middle body structure schematic diagram;
Figure 10 is three grades of some braking structural representations of band retarder of the present invention;
Figure 11 is the dummy piston main valve structural representations of stopping of three grades of points in Figure 10.
Valve 37. dummy piston 38. plunger cap 39. one-level balance spring (pre-compressed spring) 40. spring cutting ferrule 41. secondary balance spring 53. elasticity backing pins on valve spring 21.O type circle 22. retracing springs 23. interlock groove 24. upper body 27. circlip 31. dust protecting cap 32. bolt 33.O type circle 34. lower valve 35.O type circles 36. on valve seat 20. on body 14.O type circle 15.O type circle 16. circlip 17.O type circle 18.O type circles 19. in 1. clip 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 circles 13. in figure, valve wall on 54., 55. lower valve walls, 61. 3 grades of balance spring 62. annular housings of 60. times air extractor ducts of 59. times admission ports of air extractor duct 58. auxilairy air intake on 56. enterprising gas ports 57..1001. first pipeline section 1002. second pipeline section 1003. the 3rd pipeline section 1004. pressure step surface 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.
The specific embodiment
Embodiment 1: a kind of secondary points braking structure of moral dragon serial band retarder, referring to Fig. 1, comprises upper body 24, middle body 13 and lower body 8 etc. that sealing is fixed together from top to bottom successively.
The top of upper body is tubular structure, in upper body, 24 top inner chamber is set with dummy piston 37, the top inner chamber of upper body 24 is also provided with the spacing back-up ring 27 that prevents that dummy piston is ejected, the upper outside coupling of upper body 24 is set with dust protecting cap 31, after dust protecting cap 31 outside suit clips 1, be fixed on 24 outsides, upper body, dust protecting cap 31 arranges centre hole and is provided with interlock groove 23 at central hole location.
Pedal is hinged on a side of upper body or pedal base by bearing pin, be provided with and coordinate bearing pin and the flat gasket compressing with sliding sleeve upper end on pedal.Tappet upper end is connected with pedal, and the shrinkage pool bottom, center of lower end and plunger cap compresses mutually.
In upper body, 24 inner chamber top is set with dummy piston 37, and the upper end of dummy piston 37 outwards arranges flange, between this flange lower surface and upper body intracavity bottom, is supported with retracing spring 22; Dummy piston 37 upper ends 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.
Referring to Fig. 3, the top of dummy piston is columnar width dish chamber A, and the cavity shape projection that stretch out the bottom of dummy piston is body of rod chamber B.
Referring to Fig. 6 and Fig. 7, the top of plunger cap 38 is width dish 3801, the three section step bodies of rod successively attenuating of bottom for stretching out from width dish 3801, be followed successively by from top to down first body of rod 3803, second body of rod 3804 and 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 bottoms, and the upper end of width dish 3801 is sleeved in the width dish chamber A in dummy piston 37 by jump ring 53.
Referring to Fig. 4 and Fig. 5, 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 provided with inside and continuous annular upper overturning 4001, and lower end is provided with flange 4002 under outside and continuous annular.
In Fig. 2, spring cutting ferrule 40 outer cover are equipped with one-level balance spring 39, and one-level balance spring 39 is supported under width dish 3801 lower surfaces of plunger cap 38 and the annular of spring cutting ferrule 40 between flange 4002 upper surfaces; Spring cutting ferrule 40 internal sleeve are 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 ends 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 ends 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 ends, the step surface of the second body of rod 3804 lower ends 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.
And 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 mates with the diameter 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; The lower end of described tappet and plunger cap 38 center shrinkage pool bottom compress mutually.
Referring to Fig. 1, in upper body, the bottom of 24 inner chambers is provided with the upper valve wall 54 of annular, and 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 chambers, 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, between the downside of this outward flanging and upper valve seat 18, be supported with spring 20, upper valve seat 18 fixes the inner side at upper valve wall 54 by circlip.
In the inner chamber of lower body 8, be provided with annular lower valve wall 55, 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 chambers, 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, between the downside of this outward flanging and lower valve seat 7, be supported with spring 9, lower valve seat 7 fixes the inner side at lower valve wall 55 by circlip.
The relay piston 10 of hollow is housed at middle body 13 inner seal sleeves, and the bottom of described dummy piston 37 is controlled upper valve member and is opened and closed, and the bottom of relay piston 10 is controlled lower valve assembly and opened and closed.Referring to Fig. 8, described relay piston 10 is disposed with the first pipeline section 1001, the second pipeline section 1002 and the 3rd pipeline section 1003 that diameter increases successively from top to bottom, wherein the first pipeline section 1001 external diameters and upper valve 36 inner wall sealings are set with, the second pipeline section 1002 is set with the inner wall sealing of middle body 13, and the 3rd pipeline section 1003 is set with the inner wall sealing of lower body 8.Referring to Fig. 9, middle body 13 inwalls are provided with ring-shaped air chamber 62, and be provided with auxilairy air intake 58 in middle body 13 1 sides, this auxilairy air intake 58 is communicated with ring-shaped air chamber 62, the lower ending opening of described ring-shaped air chamber 62 and with the step surface regional connectivity of described relay piston 10 second pipeline sections 1002 and the 3rd pipeline section 1003.This auxilairy air intake 58 can regulate relay piston 10, regulates the pressure that dummy piston 37 and relay piston 10 are born to reach optimum regime, reaches retarded acting.
The inner chamber upper end of the relay piston 10 in Fig. 1 is provided with admission port, in the body of rod chamber B bottom of dummy piston 37, is provided with exhausr port, and this exhausr port is communicated with the admission port of relay piston 10 upper ends; At lower valve 34 inner chamber lower end sealing shrouds, exhausr port 2 is housed, these exhausr port 2 centers are provided with dust-proof cushion 1.
Embodiment 2: three grades of some braking structures of a kind of moral dragon serial band retarder, and content is substantially the same manner as Example 1, and difference is: referring to Figure 10, the secondary points dummy piston main valve of stopping is replaced by three grades of somes dummy piston main valve of stopping.Referring to Figure 11, these three grades of somes dummy piston main valve 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 stretch out the bottom of dummy piston 37 is body of rod chamber B; The top of described plunger cap 38 is width dish, the three section step bodies of rod successively attenuating of bottom for stretching out from width dish 3801, be followed successively by from top to down first body of rod 3803, second body of rod 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 bottoms, 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 of plunger cap 38 and the inwall of dummy piston 37 width dish 3801 chamber A, the upper end of spring cutting ferrule 40 is provided with inside and continuous annular upper overturning 4001, and lower end is provided with flange under outside and continuous annular; Spring cutting ferrule 40 outer cover are equipped with one-level balance spring 39, and one-level balance spring 39 is supported under the lower surface of plunger cap 38 width dishes 3801 and the annular of spring cutting ferrule 40 between flange 4002 upper surfaces; Between the step body of rod of the inwall of spring cutting ferrule 40 and plunger cap 38, be provided with secondary balance spring 41, 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 diameters, annular upper overturning 4001 internal diameters are 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; In body of rod chamber B, be provided with three grades of balance springs,
Secondary balance spring 41 upper ends are L1 to the distance of the step surface of the first body of rod 3803 lower ends, the step surface of the second body of rod 3804 lower ends is L3 to the distance of body of rod chamber B upper surface, distance between three body of rod 3805 lower surfaces, upper end to the of three grades of balance springs is L4, distance between the upper surface of described spring cutting ferrule 40 and width dish 3801 lower surfaces is L4, L1 < L4 < L3 < L2.If the distance of L2 is too short, 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, and the internal diameter of described secondary balance spring 41 mates with the diameter 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.One-level balance spring 39 and secondary balance spring 41 have all given axial location like this, avoid its horizontal looseness, guarantee the stability of work.
Described width dish 3801 lower surfaces are provided with annular groove in the first body of rod 3803 outsides; 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 main valve
The bottom of the outside face of described dummy piston 37 is provided with the annular slot caving inward along periphery, this annular slot inner seal sleeve is equipped with seal ring.Thereby can reduce the thickness of dummy piston 37 bottoms, prevent from forming pore in its casting process, after polishing, still cause poorly sealed problem.
Working process:
Plunger cap 38 is first descending under external force, first to 39 effects of one-level balance spring, make it follow the descending of plunger cap 38 and compress, after its stroke L1 completes, the 3rd body of rod 3805 lower ends of plunger cap 38 contact with three grades of balance springs, now three grades of balance springs and 39 combineds action of one-level balance spring, after its L4 stroke completes, end in contact on the first body of rod 3803 lower surfaces of plunger cap 38 and secondary balance spring 41, now one-level balance spring 39, three grades of balance springs and secondary balance spring 41 co-operation;
For 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 these dummy piston 37 main valves are installed rear one-level balance spring 39 and the lower flange of spring cutting ferrule 40 are pressed onto to the lower surface of width dish 3801 chamber A; When plunger cap 38 is descending, first act on one-level balance spring 39 like this, after the stroke of L4 completes, act on again one-level balance spring 39, secondary balance spring 41 and three grades of balance spring its effects side by side simultaneously.
Another situation is exactly to select spring that length just mates with spring cutting ferrule 40 internal height as secondary balance spring 41, so just needn't limit the rigidity of secondary balance spring 41.
Claims (6)
1. the two-stage cadence braking master valve of moral dragon serial band retarder, comprise pedal, tappet and valve, and admission port and air extractor duct, comprise successively the upper body that sealing is fixed together from top to bottom, middle body and lower body, it is characterized in that: the top of upper body is tubular structure, on the top of upper body, inner chamber is set with dummy piston, the top inner chamber of upper body is also provided with the spacing back-up ring that prevents that dummy piston is ejected, the upper outside coupling of upper body is set with dust protecting cap, after the suit clip of dust protecting cap outside, be fixed on outside, upper body, dust protecting cap arranges centre hole and is provided with interlock groove at central hole location, the upper end of described dummy piston outwards arranges flange, between this flange lower surface and upper body intracavity bottom, is supported with retracing spring, the top of dummy piston is columnar width dish chamber A, and the cavity shape projection that stretch out the bottom of dummy piston is body of rod chamber B, the top of described plunger cap is width dish, the three section step bodies of rod successively attenuating of bottom for stretching out from width dish, be 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, 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 provided with inside and continuous annular upper overturning, and lower end is provided with flange under outside and continuous annular, spring cutting ferrule outer cover is equipped with one-level balance spring, and one-level balance spring is 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, and the internal diameter of described secondary balance spring mates with the diameter of second body of rod, the internal diameter of described one-level balance spring mates with the external diameter of spring cutting ferrule, the shrinkage pool bottom, center of the lower end of described tappet and plunger cap compresses mutually, 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 upper valve and the upper valve seat of cylindrical shape, the upper end of upper valve is provided with outward flanging and upper valve port force fit, between the downside of this outward flanging and upper valve seat, be supported with spring, upper valve seat fixes the inner side at upper valve wall by circlip, in described lower intracoelomic cavity, be provided with annular lower valve wall, 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, between the downside of this outward flanging and lower valve seat, be supported with spring, lower valve seat fixes the inner side at lower valve wall by circlip, the relay piston of hollow is housed at described middle body inner seal sleeve, and the bottom of described dummy piston is controlled upper valve member and is opened and closed, and the bottom of relay piston is controlled lower valve assembly and opened and closed, described relay piston is disposed with the first pipeline section, the second pipeline section and the 3rd pipeline section that diameter increases successively from top to bottom, wherein the first pipeline section external diameter and upper valve inner wall sealing are set with, the second pipeline section and middle body inner wall sealing suit, the 3rd pipeline section and lower body inner wall sealing suit, described middle body inwall is provided with ring-shaped air chamber, and be provided with auxilairy air intake in middle body one side, this auxilairy air intake is communicated with ring-shaped air chamber, the lower ending opening of described ring-shaped air chamber and with the step surface regional connectivity of described the second pipeline section and the 3rd pipeline section.
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, in the body of rod chamber B 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: between sliding sleeve and pedal base, fix and have dust protecting cap.
4. three grades of cadence braking master valves of moral dragon serial band retarder, comprise pedal, tappet and valve, and admission port and air extractor duct, comprise successively the upper body that sealing is fixed together from top to bottom, middle body and lower body, it is characterized in that: the top of upper body is tubular structure, on the top of upper body, inner chamber is set with dummy piston, the top inner chamber of upper body is also provided with the spacing back-up ring that prevents that dummy piston is ejected, the upper outside coupling of upper body is set with dust protecting cap, after the suit clip of dust protecting cap outside, be fixed on outside, upper body, dust protecting cap arranges centre hole and is provided with interlock groove at central hole location, dock with plunger cap inner chamber dummy piston upper end, and the top of dummy piston is columnar width dish chamber A, and the cavity shape projection that stretch out the bottom of dummy piston is body of rod chamber B, the top of described plunger cap is width dish, the three section step bodies of rod successively attenuating of bottom for stretching out from width dish, be 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, 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 provided with inside and continuous annular upper overturning, and lower end is provided with flange under outside and continuous annular, spring cutting ferrule outer cover is equipped with one-level balance spring, and one-level balance spring is 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, in body of rod chamber B, be provided with three grades of balance springs, 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 three body of rod lower surfaces, upper end to the of three grades of balance springs is L4, 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, and the internal diameter of described secondary balance spring mates with the diameter of second body of rod, the internal diameter of described one-level balance spring mates with the external diameter of spring cutting ferrule, the shrinkage pool bottom, center of the lower end of described tappet and plunger cap compresses mutually, 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 upper valve and the upper valve seat of cylindrical shape, the upper end of upper valve is provided with outward flanging and upper valve port force fit, between the downside of this outward flanging and upper valve seat, be supported with spring, upper valve seat fixes the inner side at upper valve wall by circlip, in described lower intracoelomic cavity, be provided with annular lower valve wall, 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, between the downside of this outward flanging and lower valve seat, be supported with spring, lower valve seat fixes the inner side at lower valve wall by circlip, the relay piston of hollow is housed at described middle body inner seal sleeve, and the bottom of described dummy piston is controlled upper valve member and is opened and closed, and the bottom of relay piston is controlled lower valve assembly and opened and closed, described relay piston is disposed with the first pipeline section, the second pipeline section and the 3rd pipeline section that diameter increases successively from top to bottom, wherein the first pipeline section external diameter and upper valve inner wall sealing are set with, the second pipeline section and middle body inner wall sealing suit, the 3rd pipeline section and lower body inner wall sealing suit, described middle body inwall is provided with ring-shaped air chamber, and be provided with auxilairy air intake in middle body one side, this auxilairy air intake is communicated with ring-shaped air chamber, the lower ending opening of described ring-shaped air chamber and with the step surface regional connectivity of described the second pipeline section and the 3rd pipeline section.
5. three grades of cadence braking master valves according to claim 4, is characterized in that: the inner chamber upper end of described relay piston is provided with admission port, in the body of rod chamber B bottom of dummy piston, are 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.
6. three grades of cadence braking master valves according to claim 4, is characterized in that: between sliding sleeve and pedal base, fix and have dust protecting cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410485423.7A CN104192131B (en) | 2014-09-22 | 2014-09-22 | With retarder two grades and three grades of cadence braking master valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410485423.7A CN104192131B (en) | 2014-09-22 | 2014-09-22 | With retarder two grades and three grades of cadence braking master valves |
Publications (2)
| Publication Number | Publication Date |
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| CN104192131A true CN104192131A (en) | 2014-12-10 |
| CN104192131B CN104192131B (en) | 2016-08-24 |
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| CN201410485423.7A Expired - Fee Related CN104192131B (en) | 2014-09-22 | 2014-09-22 | With retarder two grades and three grades of cadence braking master valves |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6276137B1 (en) * | 2000-01-14 | 2001-08-21 | Delphi Technologies, Inc. | Brake master cylinder with dual check valve compensation through secondary piston |
| CN101028814A (en) * | 2006-09-30 | 2007-09-05 | 田青锋 | Three-inlet and multi-exit two-stage electromagnetic booster braking general pump |
| 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) |
| CN201769819U (en) * | 2010-05-18 | 2011-03-23 | 河南昌通科技有限公司 | Secondary-snub-braking master valve |
| CN204323320U (en) * | 2014-09-22 | 2015-05-13 | 昌通科技有限公司 | The secondary of moral dragon serial band retarder and three grades of cadence braking master valves |
-
2014
- 2014-09-22 CN CN201410485423.7A patent/CN104192131B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6276137B1 (en) * | 2000-01-14 | 2001-08-21 | Delphi Technologies, Inc. | Brake master cylinder with dual check valve compensation through secondary piston |
| CN101028814A (en) * | 2006-09-30 | 2007-09-05 | 田青锋 | Three-inlet and multi-exit two-stage electromagnetic booster braking general pump |
| CN201769819U (en) * | 2010-05-18 | 2011-03-23 | 河南昌通科技有限公司 | Secondary-snub-braking master valve |
| CN101837774A (en) * | 2010-05-31 | 2010-09-22 | 河南昌通科技有限公司 | Two-stage cadence braking master valve (type V) |
| CN204323320U (en) * | 2014-09-22 | 2015-05-13 | 昌通科技有限公司 | The secondary of moral dragon serial band retarder and three grades of cadence braking master valves |
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|---|---|
| CN104192131B (en) | 2016-08-24 |
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