CN102019922A - Two-stage point brake master valve - Google Patents
Two-stage point brake master valve Download PDFInfo
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- CN102019922A CN102019922A CN 201010186590 CN201010186590A CN102019922A CN 102019922 A CN102019922 A CN 102019922A CN 201010186590 CN201010186590 CN 201010186590 CN 201010186590 A CN201010186590 A CN 201010186590A CN 102019922 A CN102019922 A CN 102019922A
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Abstract
The invention relates to a two-stage point brake master valve which comprises a lever seat, an upper valve body and a lower valve body, wherein a jacking rod is arranged between the lever seat and the upper valve body; both the upper valve and the lower valve body are respectively provided with an air inlet hole and an air outlet hole; the upper valve body and the lower valve body are fixed in a sealed way; the upper part in the upper valve body is provided with an upper piston assembly, and the lower part of the upper valve body is provided with an upper valve assembly; the middle part of the lower valve body is provided with a lower valve assembly; the upper valve assembly and the lower valve assembly carry out transmission through a lower piston arranged on the upper part in the lower valve body; and the upper piston assembly comprises a piston sleeve, an upper piston, a spring package card and a jacking rod seat. The brake master valve can generate immediate promotion energy at the initial weak pressure stage of braking and can promote a brake sheet and a brake drum to quickly and powerfully combine so as to have a good combining condition and guarantee a good brake effect all the time. Meanwhile, friction between the brake sheet and the brake drum can be furthest reduced so as to prevent the brake sheet from carbonizing and prolong the service li8fe of the brake system.
Description
One, technical field
The present invention relates to a kind of automobile brake main valve, particularly relate to a kind of two-stage cadence braking master valve (IV type).
Two, background technology
Existing standard form braking main valve has a little less than the braking force control brake distance that can not be good during heavy duty; Also have the controlled pedal bounce heavy, this shortcoming directly has influence on operation comfort, can increase shortcomings such as chaufeur physical demands in addition.
In order to improve above-mentioned shortcoming, people have invented a kind of " the potent master cylinder of light load ", this technology has clear improvement to above-mentioned shortcoming, but also there are many defectives in it, and the principle of this technology is to have changed air-flow velocity, after the air-flow speedup under the equal conditions, than being easier to damage the brake system annex, as brake facing, brake drum, pipe fitting etc., heavy then have influence on suspension system, under equal conditions braking is too anxious in addition, the bad control of feel, cause brake facing to heat up rapidly easily, cause carbonization, directly have influence on braking effect, it is too urgent to brake, also can cause partially sliding, influence resistance to overturning, thereby produce insecurity, or unnecessary economic loss.
Three, summary of the invention
To the objective of the invention is in order addressing the above problem, a kind of two-stage cadence braking master valve (IV type) to be provided, this master cylinder has improved safety, operation comfort and economy, can improve the shortcoming of above-mentioned conventional art fully.
Technical scheme of the present invention is: a kind of two-stage cadence braking master valve (IV type), contain lever seat, upper valve body and following valve body, be provided with push rod between described lever seat and the upper valve body, be equipped with induction opening and air gate on upper valve body and the following valve body, also sealing and fixing is inserted in the upper edge of valve body down in the lower edge of described upper valve body, described upper valve body internal upper part is equipped with the upper piston assembly, described upper valve body bottom is equipped with valve member, the middle part is equipped with the lower valve assembly in the described valve body down, between the described up and down valve member by being installed in down the lower piston transmission of valve body internal upper part, described upper piston assembly contains piston bush, upper piston, spring bag card, tip-lever support, described piston bush is installed in the stepped hole on upper valve body top by jump ring and dust-proof cushion deck, described upper piston is installed in the piston bush by jump ring, described upper piston is the inner piston of cavity that is, form the bearing fit face by hermetically-sealed construction between the outside face of upper piston and the piston bush inside face, be provided with pull back spring between upper piston and the piston bush; The upper piston bottom is stretched out cavity shape projection and is pusher body, and this pusher body is over against the described valve member of going up; The body of rod hypomere of described tip-lever support inserts in the cavity of described upper piston bottom pusher body, periphery, top at tip-lever support is a disc width of cloth dish, described spring Bao Kawei is columnar structured, upper wall is provided with reducing, the body of rod diameter coupling of this reentrant diameter and tip-lever support, the spring bag card sidewall first half and top are provided with three breach that are communicated in the reducing, make spring bag card top form three extensions, spring bag card lower edges is respectively equipped with three interior flangings and three in-flangess, three in-flangess are corresponding with three breach, and three flangings are corresponding with three extensions; The width of cloth dish of described tip-lever support is provided with and the cooresponding width of cloth of described extension hole, the body of rod of described tip-lever support penetrates from the reducing of spring bag card, its body of rod hypomere passes the center of three in-flangess of spring bag card, and the extension of spring bag card inserts in the described width of cloth hole; The interior flanging of described spring bag card bottom is sitting in the lower surface in the described upper piston cavity; Upper edge in the described upper piston cavity is provided with annular spring, the width of cloth dish of tip-lever support is positioned under the jump ring, the outer pressure-stabilizing spring that is set with of described spring bag card, this pressure-stabilizing spring lower support are on the flanging of spring bag card, and the upper support of pressure-stabilizing spring is below the width of cloth dish of tip-lever support; The described spring Bao Kanei tip-lever support body of rod is set with the pressure spring outward, and the lower support of this pressure spring is on the in-flanges of spring bag card, and there is certain distance on the top of pressure spring apart from the lower surface of the width of cloth dish of tip-lever support.
Described upper valve body and following valve body connecting portion are provided with seal ring; Be provided with hermetically-sealed construction in described piston bush outside face and the upper valve body and between the inside face of its coupling.
Be provided with the upper shell that communicates with the upper valve body induction opening in the described upper valve body, the upper edge of this upper shell is provided with annular in-flanges; By jump ring valve member is installed in the described upper shell, last valve member comprises that cavity shape is gone up valve, is coated on valve upper surface packing seal; The upper end that should go up valve is provided with inside and outside step, is provided with convex annular edge upwards at interior step edge; The described valve of going up is set with the valve plug outward, and surfaces externally and internally of valve plug forms the bearing fit face with last valve outside face and upper shell inside face respectively on this, and is provided with hermetically-sealed construction; Described going up between valve plug top and the outer step of last valve is supported with retracing spring; This retracing spring supports the in-flanges of going up valve and packing seal and upper shell top and forms valve, and the jump ring location that is installed in upper shell inwall bottom is arranged at the described valve plug bottom of going up; Be cavity between described upper shell and the upper valve body, this cavity is communicated with the upper valve body air gate;
Between the inner surface of outer cover on described valve body top down and the described lower piston is the bearing fit face, and the top guide bar of this lower piston inserts in the cavity of going up valve, and this top guide bar outside face and last valve cavity inside face form the bearing fit face, and are provided with hermetically-sealed construction; Form air chamber between the upper surface of this lower piston and the last valve plug surface, this air chamber is communicated with cavity between the upper valve body shell by pore and described upper shell; Described lower piston bottom is provided with lower guide rod, and this lower guide rod is over against the lower valve assembly;
Be provided with and the identical lower shell of following valve body induction opening in the valve body under described, the top of this lower shell is provided with in-flanges; Described lower shell is equipped with the lower valve assembly by jump ring, and the lower valve assembly comprises valve under the cavity shape, is coated on down the packing seal of valve upper surface; The upper end of this time valve is provided with inside and outside step, is provided with convex annular edge upwards at interior step edge; Described valve down is set with down the valve plug outward, and the surfaces externally and internally of this time valve plug forms the bearing fit face with following valve outside face and lower shell inside face respectively, and is provided with hermetically-sealed construction; Be supported with retracing spring between the outer step of described valve plug top down and following valve, the in-flanges on valve and packing seal and lower shell top formed valve under this retracing spring supported; Described valve plug bottom is down supported by the plug that is installed in down valve body lower end by jump ring; This plug middle part is extended with interior pipe, and pipe inserts in the described valve cavity down in this, forms the bearing fit face by hermetically-sealed construction and following valve cavity inside face; Between described lower shell and the following valve shell is cavity, and this cavity is communicated with following valve body air gate; Being provided with hermetically-sealed construction between described plug outside face and the following valve interior surface, is air chamber between described plug upper surface and the following valve plug lower surface, and this air chamber is communicated to cavity between lower shell and the following valve body by pore.
Also mate on the described packing seal circumference side of going up on the valve and be enclosed with one deck bag circle.
Upper end, described tip-lever support side is provided with draw-in groove, between this draw-in groove and the described dust-proof cushion deck dust-proof cushion is installed.
Pass through the fastener captive joint between the described upper and lower valve body.
Described valve body up and down is equipped with an induction opening and three air gates.
Beneficial effect of the present invention
This braking main valve can produce a kind of short energy in initial weak pressure stage of brake, can impel between brake facing and the brake drum rapidly and strong combining, thereby the good binding condition is arranged all the time, guarantees to have good braking effect all the time.Can at utmost reduce simultaneously the friction between brake facing and the brake drum, prevent the brake facing carbonization, prolong the service life of brake system.
Four, description of drawings
Fig. 1 is that this two-stage cadence braking master valve (IV type) is faced the sectional structure scheme drawing
Fig. 2 is the structural representation of facing of the spring bag card among Fig. 1
Fig. 3 is the plan structure scheme drawing of Fig. 2
Fig. 4 is the A-A cross-sectional view of Fig. 3
Fig. 5 is the perspective view of this spring bag card
Fig. 6 is the structural representation of facing of tip-lever support among Fig. 1
Fig. 7 is a B-B sectional structure scheme drawing among Fig. 6
Fig. 8 is the plan structure scheme drawing of Fig. 6
Fig. 9 is the perspective view of this tip-lever support
Five, the specific embodiment
Referring to Fig. 1-Fig. 9,1. plugs among the figure, 2.O type circle, 3. descend valve body, 4. spring, 5. bag encloses, 6.O type circle, 7.O type circle, 8. jump ring, 9.O type circle, 10.O type circle, 11. bag circle, 12.O type circle, 13. upper valve body, 14. spring bag card, 15. lever seat, 16. tip-lever support, 17. jump ring, 18. push rod, 19. dust protecting cap, 20. rivet, 21. lining, 22. dust-proof cushion, 23. gland, 24. bolt of rear end plate, 25.O type circle, 26. valve, 27. lower piston, 28. plug, 29.O type circle, 30. retracing spring, 31. valve, 32. pressure spring, 33. pull back spring, 34. upper piston (main piston), 35. bolt of rear end plate, 36. pressure-stabilizing spring, 37. upper valve body induction opening, 38. upper valve body air gate, 39. following valve body induction opening, 40. following valve body air gate, 41. bolt of rear end plate.
Wherein, wherein 14-1. reducing, 14-2. breach, 14-3. sidewall, 14-4. flanging, 14-5. in-flanges, 16-1. width of cloth dish, 16-2. width of cloth hole, 16-4. draw-in groove, the 16-5. body of rod.
Embodiment: referring to institute's drawings attached, a kind of two-stage cadence braking master valve (IV type), contain lever seat 15, upper valve body 13 and following valve body 3, be provided with push rod 18 between described lever seat 15 and the upper valve body 13, be equipped with induction opening and air gate on upper valve body 13 and the following valve body 3, wherein label 37 is represented the induction opening of upper valve bodies, label 38 expression upper valve body air gates, on upper valve body, be provided with an induction opening and three air gates altogether, vertical mutually in twos between admission port and the air gate, wherein label 39 is represented the induction opening of valve body down, label 40 expressions are the valve body air gate down, be provided with an induction opening and three air gates altogether on the valve body down, vertical mutually in twos between admission port and the air gate.Also sealing and fixing is inserted in the upper edge of valve body 3 down in the lower edge of described upper valve body 13, described upper valve body 13 internal upper parts are equipped with the upper piston assembly, described upper valve body bottom is equipped with valve member, the middle part is equipped with the lower valve assembly in the described down valve body, between the described upper and lower valve member by being installed in down the lower piston transmission of valve body internal upper part.
Described upper piston assembly contains upper piston (or claiming main piston) 34, spring bag card 14 and tip-lever support 16.Described upper piston 34 is that a kind of inside is the piston of cavity, form bearing fit face (hermetically-sealed construction sees that label among Fig. 1 is 12 O type circle) by hermetically-sealed construction between the outside face of upper piston 34 and upper valve body 13 inside faces, be provided with pull back spring 33 between upper piston 34 and the upper valve body 13.The upper piston bottom is stretched out cavity shape projection and is pusher body (end face is an annular ring), and this pusher body is over against the described valve member of going up.The body of rod hypomere of described tip-lever support 16 inserts in the cavity of described upper piston 34 bottom pusher bodies, periphery, top at tip-lever support 16 is disc width of cloth dish 16-1, described spring bag card 14 is columnar structured, upper wall is provided with reducing 14-1, the body of rod 16-2 diameter coupling of this reducing 14-1 diameter and tip-lever support, the spring bag card 14 sidewall first halves and top are provided with three breach 14-2 that are communicated in the reducing, make spring bag card top form three extensions, spring bag card lower edges is respectively equipped with three interior flanging 14-4 and three in-flanges 14-5, three in-flanges 14-5 are corresponding with three breach 14-2, and three flanging 14-4 are corresponding with three extensions.The width of cloth dish of described tip-lever support 16 is provided with and the cooresponding width of cloth of described extension hole 16-3, the body of rod 16-2 of described tip-lever support penetrates from the reducing 14-1 of spring bag card 14, its body of rod hypomere passes the center of three in-flanges 14-5 of spring bag card 14, and the extension of spring bag card 14 inserts in the described width of cloth hole; The inside and outside flange of described spring bag card bottom is sitting in the lower surface in described upper piston 34 cavitys.Upper edge in described upper piston 34 cavitys is provided with annular spring 17, the width of cloth dish 14-4 of tip-lever support 16 is positioned under the jump ring, the outer pressure-stabilizing spring 36 that is set with of described spring bag card 14, this pressure-stabilizing spring lower support is on the flanging 14-4 of spring bag card, and the upper support of pressure-stabilizing spring 36 is below the width of cloth dish 16-1 of tip-lever support; The tip-lever support body of rod is set with pressure spring 32 outward in the described spring bag card 14, and the lower support of this pressure spring is on the in-flanges 14-5 of spring bag card, and there is certain distance on the top of pressure spring 32 apart from the lower surface of the width of cloth dish 16-1 of tip-lever support.
Described upper valve body and following valve body connecting portion are provided with seal ring; Be provided with hermetically-sealed construction in described piston bush outside face and the upper valve body and between the inside face of its coupling.
Be provided with the upper shell that communicates with the upper valve body induction opening in the described upper valve body, the upper edge of this upper shell is provided with annular in-flanges; By jump ring valve member is installed in the described upper shell, last valve member comprises that cavity shape is gone up valve, is coated on valve upper surface packing seal; The upper end that should go up valve is provided with inside and outside step, is provided with convex annular edge upwards at interior step edge; The described valve of going up is set with the valve plug outward, and surfaces externally and internally of valve plug forms the bearing fit face with last valve outside face and upper shell inside face respectively on this, and is provided with hermetically-sealed construction; Described going up between valve plug top and the outer step of last valve is supported with retracing spring; This retracing spring supports the in-flanges of going up valve and packing seal and upper shell top and forms valve, and the jump ring location that is installed in upper shell inwall bottom is arranged at the described valve plug bottom of going up; Be cavity between described upper shell and the upper valve body, this cavity is communicated with the upper valve body air gate;
Between the inner surface of outer cover on described valve body top down and the described lower piston is the bearing fit face, and the top guide bar of this lower piston inserts in the cavity of going up valve, and this top guide bar outside face and last valve cavity inside face form the bearing fit face, and are provided with hermetically-sealed construction; Form air chamber between the upper surface of this lower piston and the last valve plug surface, this air chamber is communicated with cavity between the upper valve body shell by pore and described upper shell; Described lower piston bottom is provided with lower guide rod, and this lower guide rod is over against the lower valve assembly;
Be provided with and the identical lower shell of following valve body induction opening in the valve body under described, the top of this lower shell is provided with in-flanges; Described lower shell is equipped with the lower valve assembly by jump ring, and the lower valve assembly comprises valve under the cavity shape, is coated on down the packing seal of valve upper surface; The upper end of this time valve is provided with inside and outside step, is provided with convex annular edge upwards at interior step edge; Described valve down is set with down the valve plug outward, and the surfaces externally and internally of this time valve plug forms the bearing fit face with following valve outside face and lower shell inside face respectively, and is provided with hermetically-sealed construction; Be supported with retracing spring between the outer step of described valve plug top down and following valve, the in-flanges on valve and packing seal and lower shell top formed valve under this retracing spring supported; Described valve plug bottom is down supported by the plug that is installed in down valve body lower end by jump ring; This plug middle part is extended with interior pipe, and pipe inserts in the described valve cavity down in this, forms the bearing fit face by hermetically-sealed construction and following valve cavity inside face; Between described lower shell and the following valve shell is cavity, and this cavity is communicated with following valve body air gate; Being provided with hermetically-sealed construction between described plug outside face and the following valve interior surface, is air chamber between described plug upper surface and the following valve plug lower surface, and this air chamber is communicated to cavity between lower shell and the following valve body by pore.
Also mate on the described packing seal circumference side of going up on the valve and be enclosed with one deck bag circle.
Upper end, described tip-lever support side is provided with draw-in groove, between this draw-in groove and the described dust-proof cushion deck dust-proof cushion is installed.
Pass through the fastener captive joint between the described upper and lower valve body.
When tip-lever support presses down, tip-lever support presses down pressure-stabilizing spring by width of cloth dish and gives upper piston with transmission of pressure, and upper piston is descending, and its pusher body is given last valve with transmission of pressure, last valve is descending and open, be communicated with induction opening and air gate, when last valve was opened, air pressure can form on the ground of upper piston and upward pressure, the upper piston back-pressure that makes progress, upper piston roof pressure pressure-stabilizing spring, pressure-stabilizing spring shrinks under the situation of bidirectional stress
When described tip-lever support is descending as required, the extension of spring bag card passes the width of cloth hole upward movement of tip-lever support, because in-to-in pressure spring upper surface has certain distance apart from the width of cloth dish lower surface of tip-lever support, at tip-lever support width of cloth dish lower surface and this segment distance of pressure spring upper surface, has only outside pressure-stabilizing spring pressure-bearing, after treating the width of cloth dish lower surface of in-to-in pressure spring bump tip-lever support, thereby can produce a kind of short energy, at this moment it is the starting stage of pressure process, it also is the weak pressure stage of air pressure, the energy that both clash into generation can make air pressure under equal conditions raise rapidly, and return rapidly, thereby strengthen the dynamics that combines of brake facing and brake drum, form and put the effect of stopping; thereupon can guarantee that brake facing and brake drum have the good binding condition all the time, guarantee to have good braking effect all the time.Here it is described " secondary points is stopped ".
Simultaneously, when pressure-stabilizing spring and the common pressure-bearing of pressure spring and when working simultaneously, can form a kind of surging energy, can make braking force produce a kind of have intermittent energy impact and fluctuation under the equal conditions of this energy in the air pressure range of setting in the pressure process, summary by theory and practice, this spring up to be actually strengthened braking force, improved braking effect.
Claims (7)
1. two-stage cadence braking master valve, contain lever seat, upper valve body and following valve body, be provided with push rod between described lever seat and the upper valve body, be equipped with induction opening and air gate on upper valve body and the following valve body, also sealing and fixing is inserted in the upper edge of valve body down in the lower edge of described upper valve body, described upper valve body internal upper part is equipped with the upper piston assembly, described upper valve body bottom is equipped with valve member, the middle part is equipped with the lower valve assembly in the described valve body down, on described, between the lower valve assembly by being installed in down the lower piston transmission of valve body internal upper part, it is characterized in that: described upper piston assembly contains piston bush, upper piston, spring bag card, tip-lever support, described piston bush is installed in the stepped hole on upper valve body top by jump ring and dust-proof cushion deck, described upper piston is installed in the piston bush by jump ring, described upper piston is the inner piston of cavity that is, form the bearing fit face by hermetically-sealed construction between the outside face of upper piston and the piston bush inside face, be provided with pull back spring between upper piston and the piston bush; The upper piston bottom is stretched out cavity shape projection and is pusher body, and this pusher body is over against the described valve member of going up; The body of rod hypomere of described tip-lever support inserts in the cavity of described upper piston bottom pusher body, periphery, top at tip-lever support is a disc width of cloth dish, described spring Bao Kawei is columnar structured, upper wall is provided with reducing, the body of rod diameter coupling of this reentrant diameter and tip-lever support, the spring bag card sidewall first half and top are provided with three breach that are communicated in the reducing, make spring bag card top form three extensions, spring bag card lower edges is respectively equipped with three interior flangings and three in-flangess, three in-flangess are corresponding with three breach, and three flangings are corresponding with three extensions; The width of cloth dish of described tip-lever support is provided with and the cooresponding width of cloth of described extension hole, the body of rod of described tip-lever support penetrates from the reducing of spring bag card, its body of rod hypomere passes the center of three in-flangess of spring bag card, and the extension of spring bag card inserts in the described width of cloth hole; The interior flanging of described spring bag card bottom is sitting in the lower surface in the described upper piston cavity; Upper edge in the described upper piston cavity is provided with annular spring, the width of cloth dish of tip-lever support is positioned under the jump ring, the outer pressure-stabilizing spring that is set with of described spring bag card, this pressure-stabilizing spring lower support are on the flanging of spring bag card, and the upper support of pressure-stabilizing spring is below the width of cloth dish of tip-lever support; The described spring Bao Kanei tip-lever support body of rod is set with the pressure spring outward, and the lower support of this pressure spring is on the in-flanges of spring bag card, and there is certain distance on the top of pressure spring apart from the lower surface of the width of cloth dish of tip-lever support.
2. two-stage cadence braking master valve according to claim 1 is characterized in that: described upper valve body and following valve body connecting portion are provided with seal ring; Be provided with hermetically-sealed construction in described piston bush outside face and the upper valve body and between the inside face of its coupling.
3. two-stage cadence braking master valve according to claim 1 is characterized in that: be provided with the upper shell that communicates with the upper valve body induction opening in the described upper valve body, the upper edge of this upper shell is provided with annular in-flanges; By jump ring valve member is installed in the described upper shell, last valve member comprises that cavity shape is gone up valve, is coated on valve upper surface packing seal; The upper end that should go up valve is provided with inside and outside step, is provided with convex annular edge upwards at interior step edge; The described valve of going up is set with the valve plug outward, and surfaces externally and internally of valve plug forms the bearing fit face with last valve outside face and upper shell inside face respectively on this, and is provided with hermetically-sealed construction; Described going up between valve plug top and the outer step of last valve is supported with retracing spring; This retracing spring supports the in-flanges of going up valve and packing seal and upper shell top and forms valve, and the jump ring location that is installed in upper shell inwall bottom is arranged at the described valve plug bottom of going up; Be cavity between described upper shell and the upper valve body, this cavity is communicated with the upper valve body air gate;
Between the inner surface of outer cover on described valve body top down and the described lower piston is the bearing fit face, and the top guide bar of this lower piston inserts in the cavity of going up valve, and this top guide bar outside face and last valve cavity inside face form the bearing fit face, and are provided with hermetically-sealed construction; Form air chamber between the upper surface of this lower piston and the last valve plug surface, this air chamber is communicated with cavity between the upper valve body shell by pore and described upper shell; Described lower piston bottom is provided with lower guide rod, and this lower guide rod is over against the lower valve assembly;
Be provided with and the identical lower shell of following valve body induction opening in the valve body under described, the top of this lower shell is provided with in-flanges; Described lower shell is equipped with the lower valve assembly by jump ring, and the lower valve assembly comprises valve under the cavity shape, is coated on down the packing seal of valve upper surface; The upper end of this time valve is provided with inside and outside step, is provided with convex annular edge upwards at interior step edge; Described valve down is set with down the valve plug outward, and the surfaces externally and internally of this time valve plug forms the bearing fit face with following valve outside face and lower shell inside face respectively, and is provided with hermetically-sealed construction; Be supported with retracing spring between the outer step of described valve plug top down and following valve, the in-flanges on valve and packing seal and lower shell top formed valve under this retracing spring supported; Described valve plug bottom is down supported by the plug that is installed in down valve body lower end by jump ring; This plug middle part is extended with interior pipe, and pipe inserts in the described valve cavity down in this, forms the bearing fit face by hermetically-sealed construction and following valve cavity inside face; Between described lower shell and the following valve shell is cavity, and this cavity is communicated with following valve body air gate; Being provided with hermetically-sealed construction between described plug outside face and the following valve interior surface, is air chamber between described plug upper surface and the following valve plug lower surface, and this air chamber is communicated to cavity between lower shell and the following valve body by pore.
4. two-stage cadence braking master valve according to claim 1 is characterized in that: on the described packing seal circumference side of going up on the valve also coupling be enclosed with one deck bag circle.
5. two-stage cadence braking master valve according to claim 1 is characterized in that: upper end, described tip-lever support side is provided with draw-in groove, between this draw-in groove and the described dust-proof cushion deck dust-proof cushion is installed.
6. two-stage cadence braking master valve according to claim 1 is characterized in that: pass through the fastener captive joint between the described upper and lower valve body.
7. two-stage cadence braking master valve according to claim 1 is characterized in that: described valve body up and down is equipped with an induction opening and three air gates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010186590 CN102019922B (en) | 2010-05-31 | 2010-05-31 | Two-stage point brake master valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010186590 CN102019922B (en) | 2010-05-31 | 2010-05-31 | Two-stage point brake master valve |
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| Publication Number | Publication Date |
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| CN102019922A true CN102019922A (en) | 2011-04-20 |
| CN102019922B CN102019922B (en) | 2013-05-22 |
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| CN 201010186590 Expired - Fee Related CN102019922B (en) | 2010-05-31 | 2010-05-31 | Two-stage point brake master valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192126A (en) * | 2014-09-22 | 2014-12-10 | 昌通科技有限公司 | Three-stage point brake balance piston assembly |
| CN104386051A (en) * | 2014-11-10 | 2015-03-04 | 昌通科技有限公司 | HOWO braking main valve with filter net |
| CN104401315A (en) * | 2014-11-10 | 2015-03-11 | 昌通科技有限公司 | Two-stage and three-stage snub brake main valve provided with filter screen for Dongfeng 140 |
| CN104354689B (en) * | 2014-09-22 | 2016-10-05 | 昌通科技有限公司 | Two grades and three grades of cadence braking master valves |
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| US5947446A (en) * | 1997-09-26 | 1999-09-07 | New York Air Brake Corporation | Control valve bushing with anodized aluminum surface with teflon |
| US6276137B1 (en) * | 2000-01-14 | 2001-08-21 | Delphi Technologies, Inc. | Brake master cylinder with dual check valve compensation through secondary piston |
| CN2671895Y (en) * | 2004-01-09 | 2005-01-19 | 张应彪 | Light and soft type automobile braking valve assembly |
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| CN201816584U (en) * | 2010-05-31 | 2011-05-04 | 河南昌通科技有限公司 | Main secondary snub braking valve |
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