CN205277662U - Needle subassembly and armature of sprayer - Google Patents
Needle subassembly and armature of sprayer Download PDFInfo
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- CN205277662U CN205277662U CN201520924976.8U CN201520924976U CN205277662U CN 205277662 U CN205277662 U CN 205277662U CN 201520924976 U CN201520924976 U CN 201520924976U CN 205277662 U CN205277662 U CN 205277662U
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- armature
- needle
- oil
- gear ring
- centre hole
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Abstract
The utility model discloses a needle subassembly of sprayer, including armature, nedle stem, fender ring, spacer sleeve, it reaches to keep off the ring the spacer sleeve, the looks spaced is fixed on the nedle stem, it is located to keep off the ring the spacer sleeve below, armature, the cover that the centre bore that sets up through the centre can move about is from top to bottom established keep off the ring together on the nedle stem between the spacer sleeve, keep off the ring, the up end is the plane, armature, the downward arch of lower terminal surface inner edge. The utility model also discloses an armature. The utility model discloses, needle valve subassembly response speed can be improved, the flow precision of sprayer is promoted.
Description
Technical field
The utility model relates to engine technology, in particular to one.
Background technology
Along with the energy and environmental requirement is increasingly strict, the more accurate spraying technique of this kind of in-cylinder direct-jet is widely used in client's engine. High pressure fuel injector is one of important part in automotive electronics injection system, it is possible to the fuel oil required for being supplied to engine accurately, forms good spraying preparation with air.
Chinese patent 200810044197.3 discloses the needle valve structure of a kind of oil thrower, and wherein armature 3 has no longer been fixedly attached on needle-valve bar 5 (being generally welding), and armature 3 socket-connects for mobilizable with needle-valve bar 5. this needle valve structure is in preparation process, on first gear ring 4 being welded on needle-valve bar 5 a suitable position, it is socketed upper armature 3 again, return spring 2 is overlapped after on interstage sleeve 1 and it is inserted in together again on needle-valve bar 5, after adjusting the free stroke of armature 3, interstage sleeve 1 is fixed on needle-valve bar 5 and (is generally welding), finally valve ball 6 is welded on the other end of needle-valve bar 5. the needle-valve of this non-fixed armature opens principle of work: as can be seen from Figure 2, in the needle valve structure of non-fixed armature, there is individual main spring 7 interstage sleeve 1 upper surface, usually this main spring 7 be provided with certain preliminary tension for push down needle-valve bar 5 to ensure valve ball 6 do not lift off a seat 8 at fuel pressure effect lower valve ball 6. when oil thrower needs work, ECU (electronic regulator) is to signal, magnetic valve produces magnetic field power under galvanic action, magnetic force is not constant, increase gradually, armature 3 is under the effect of magnetic force, overcome the gravity of self and the reactive force of return spring 2 starts toward the motion of interstage sleeve l direction, before armature 3 strikes shelves cover, valve ball 6 is still parked on valve seat 8 trim, when armature 3 moves to interstage sleeve l lower surface, for the unlatching of needle-valve provides initial kinetic energy, armature 3 and interstage sleeve l fit together, the reactive force overcoming main spring 7 under the effect of electromagnetic force makes valve ball 6 lift off a seat 8 trims, fuel oil sprays from spray orifice.
When oil thrower needs to stop work, ECU cuts off to stop instruction, electric current, and magnetic valve magnetic force weakens, under the reactive force of main spring 7, forcing needle-valve bar 5 toward the motion of valve seat 8 direction together with armature 3, when valve ball 6 contacts with valve seat 8, needle-valve bar 5 is under the effect of main spring 7, with valve ball 6, fuel sealing is lived, armature 3 is separated with interstage sleeve 1 lower surface simultaneously, does relatively independent motion, is finally fitted on the upper surface of gear ring 4 under return spring 2 acts on. The needle valve structure of this oil thrower, adopts the needle valve structure of non-fixed armature, in needle-valve opening process, owing to armature is separated with the gear ring upper surface in needle valve structure, needle-valve response can be made fast; And in needle-valve closedown process, because armature is separated with interstage sleeve lower surface, the surging force between valve ball and valve seat can be reduced, and be conducive to the abrasion between minimizing valve ball and valve seat, the noise that valve ball and valve seat produce also can reduce, meanwhile owing to the needle-valve quality of non-fixed armature alleviates relatively, it is possible to avoiding needle-valve to rebound, oil spout is more accurate.
The needle valve structure of this oil thrower, needle assembly adopts without resilience design, armature 3 and needle-valve bar 5 separate design. In opening process, armature 3 starts motion under less electromagnetic force, and opening for needle assembly provides initial kinetic energy, is conducive to oil thrower to open fast; Absorb Impact energy in closedown process, reduce needle assembly resilience.
But, existing design armature 3 is that face contacts with gear ring 4 upper surface, is subject to the impact of the liquid binder power of whole, and liquid resistance when armature 3 departs from shelves ring 4 is relatively big, affects oil thrower and opens speed; In addition, it is subject to the impact that sub-part contact position surface profile is inconsistent, the cohesive force that the armature 3 of each oil thrower is subject to is different, armature 3 is separated power difference, thus affect injector opening time difference, finally have influence on the flow tolerance range (ti is less than 0.5ms) under the flow tolerance range between oil thrower and oil thrower, particularly little pulsewidth.
Practical novel content
The technical problems to be solved in the utility model improves needle valve assembly response speed, promotes the flow accuracy of oil thrower.
For solving the problems of the technologies described above, the needle assembly of the oil thrower that the utility model provides, comprises armature, needle-valve bar, gear ring, interstage sleeve; Described gear ring and described interstage sleeve, separately be fixed on described needle-valve bar, described gear ring is positioned at below described interstage sleeve; Described armature, the centre hole arranged by centre is movable up and down is set in described gear ring with on the needle-valve bar between described interstage sleeve; Described gear ring, upper surface is plane; Described armature, in lower surface, edge is to lower convexity.
Preferably, described armature, is evenly provided with multiple oil leaking hole at the interior edge place of projection around described centre hole.
Preferably, described armature, its lower surface is provided with the recessed grain being connected described centre hole with each oil leaking hole.
Preferably, described armature, is evenly provided with 4 oil leaking holes at the interior edge place of projection around described centre hole;
The recessed grain of the connection centre hole that described armature lower surface is arranged and oil leaking hole is circular arc shape.
Preferably, in the interior edge of described armature lower surface projection and/or described gear ring upper surface, edge is formed with coating.
Preferably, the needle assembly of described oil thrower also comprises return spring, spring cover;
Described return spring, its upper end is sheathed is fixed on the described lower end of gear ring, and its lower end is fixed on the described lower end of spring cover;
Described spring cover upper end is fixed on described armature lower surface outer rim.
For solving the problems of the technologies described above, the armature that the utility model provides, is provided with centre hole in the middle of it, and in lower surface, edge is to lower convexity.
Preferably, multiple oil leaking hole evenly it is provided with at the interior edge place of projection around described centre hole.
Preferably, armature lower surface is provided with the recessed grain being connected described centre hole with each oil leaking hole.
Preferably, 4 oil leaking holes evenly it are provided with at the interior edge place of projection around described centre hole;
The recessed grain of the connection centre hole that armature lower surface is arranged and oil leaking hole is circular arc shape.
The needle assembly of oil thrower of the present utility model, in armature lower surface, edge is to lower convexity, thus edge is with stepped between outer rim in armature lower surface, such armature forms certain difference of altitude from inside to outside with the collision area of gear ring, collision area is optimized to linear contact lay by face contact, thus reducing the cohesive force between moving armature and lower baffle ring, it is to increase needle valve assembly response speed, promotes the flow accuracy of oil thrower.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical solution of the utility model, below the accompanying drawing used required for the utility model is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the floor map of existing a kind of needle valve structure;
Fig. 2 is the working state schematic representation of existing a kind of needle valve structure;
Fig. 3 is the needle assembly one example structure figure of oil thrower of the present utility model;
Fig. 4 is the needle assembly one embodiment armature same gear loop interface partial enlargement figure of oil thrower of the present utility model;
Fig. 5 is the needle assembly one embodiment armature upward view of oil thrower of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the utility model is carried out clear, complete description, it is clear that described embodiment is part embodiment of the present utility model, instead of whole embodiments. Based on the embodiment in the utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of the utility model protection.
Embodiment one
The needle assembly of oil thrower, as shown in Figure 3, Figure 4, comprises armature 3, needle-valve bar 5, gear ring 4, interstage sleeve 1;
Described gear ring 4 and described interstage sleeve 1, separately be fixed on described needle-valve bar 5, described gear ring 4 is positioned at below described interstage sleeve 1;
Described armature 3, the centre hole arranged by centre is movable up and down is set in described gear ring 4 with on the needle-valve bar 5 between described interstage sleeve 1;
Described gear ring 4, upper surface is plane;
Described armature 3, in lower surface, edge is to lower convexity.
The needle assembly of the oil thrower of embodiment one, in described armature 3 lower surface, edge is to lower convexity, thus edge is with stepped between outer rim in described armature 3 lower surface, described like this armature 3 forms certain difference of altitude from inside to outside with the collision area of described gear ring 4, collision area is optimized to linear contact lay by face contact, thus reducing the cohesive force between moving armature 3 and lower baffle ring 4, it is to increase needle valve assembly response speed, promotes the flow accuracy of oil thrower.
Embodiment two
Based on the needle assembly of embodiment one oil thrower, described armature 3 as shown in Figure 5, is evenly provided with multiple (such as 4) oil leaking hole at the interior edge place of projection around described centre hole.
The needle assembly of embodiment two oil thrower, armature 3 is evenly provided with multiple oil leaking hole at the interior edge place of projection around centre hole, the liquid between contact surface is conducive to flow out, under the prerequisite not affecting useful effect area, flowed friction can be reduced, improving flow consistence, especially little flow consistence, is conducive to engine combustion and discharge.
Preferably, described armature 3, its lower surface is provided with the recessed grain being connected described centre hole with each oil leaking hole. In armature 3 lower surface, collision area carries out trench design, not only can reduce grade ring 4 long-pending with the relative contact of armature 3 lower surface, and be conducive to the liquid between contact surface to flow out.
Preferably, the recessed grain of the connection centre hole that described armature 3 lower surface is arranged and oil leaking hole is circular arc shape. The recessed grain of circular arc shape, processing of being more convenient for.
Embodiment three
Based on the needle assembly of embodiment one oil thrower, in the interior edge of described armature 3 lower surface projection and/or described gear ring 4 upper surface, edge is formed with coating (such as chromium plating).
The needle assembly of embodiment three oil thrower, separately to contact surface surface quality optimization design, only zonule contact surface is carried out surface treatment, only need lower cost just can further thus reduce the cohesive force between moving armature 3 and lower baffle ring 4, improve needle valve assembly response speed, promote the flow accuracy of oil thrower.
Embodiment four
Based on embodiment one, the needle assembly of oil thrower also comprises return spring 2, spring cover 10;
Described return spring 2, its upper end is sheathed is fixed on described gear ring 4 times ends, and its lower end is fixed on described spring cover 10 times ends;
Described spring cover 10 upper end is fixed on described armature 3 lower surface outer rim.
The needle assembly of embodiment four oil thrower, armature 3 is under the effect of electromagnetic force, and the reactive force driving spring cover 10 to overcome return spring 2 together moves toward gear ring 4 direction. When magnetic valve magnetic force weakens, under the reactive force of return spring 2, spring cover 10 band moving armature 3 is forced to move toward interstage sleeve 1 direction together.
The foregoing is only better embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replacements, improvement etc., all should be included within the scope that the utility model is protected.
Claims (10)
1. a needle assembly for oil thrower, comprises armature, needle-valve bar, gear ring, interstage sleeve; Described gear ring and described interstage sleeve, separately be fixed on described needle-valve bar, described gear ring is positioned at below described interstage sleeve; Described armature, the centre hole arranged by centre is movable up and down is set in described gear ring with on the needle-valve bar between described interstage sleeve; It is characterized in that,
Described gear ring, upper surface is plane;
Described armature, in lower surface, edge is to lower convexity.
2. the needle assembly of oil thrower according to claim 1, it is characterised in that,
Described armature, is evenly provided with multiple oil leaking hole at the interior edge place of projection around described centre hole.
3. the needle assembly of oil thrower according to claim 2, it is characterised in that,
Described armature, its lower surface is provided with the recessed grain being connected described centre hole with each oil leaking hole.
4. the needle assembly of oil thrower according to claim 3, it is characterised in that,
Described armature, is evenly provided with 4 oil leaking holes at the interior edge place of projection around described centre hole;
The recessed grain of the connection centre hole that described armature lower surface is arranged and oil leaking hole is circular arc shape.
5. the needle assembly of oil thrower according to claim 1, it is characterised in that,
In the interior edge of described armature lower surface projection and/or described gear ring upper surface, edge is formed with coating.
6. the needle assembly of oil thrower according to claim 1, it is characterised in that,
The needle assembly of described oil thrower also comprises return spring, spring cover;
Described return spring, its upper end is sheathed is fixed on the described lower end of gear ring, and its lower end is fixed on the described lower end of spring cover;
Described spring cover upper end is fixed on described armature lower surface outer rim.
7. an armature, it is characterised in that, centre is provided with centre hole, and in lower surface, edge is to lower convexity.
8. armature according to claim 7, it is characterised in that,
Multiple oil leaking hole evenly it is provided with around described centre hole at the interior edge place of projection.
9. armature according to claim 8, it is characterised in that,
Armature lower surface is provided with the recessed grain being connected described centre hole with each oil leaking hole.
10. armature according to claim 9, it is characterised in that,
4 oil leaking holes evenly it are provided with around described centre hole at the interior edge place of projection;
The recessed grain of the connection centre hole that armature lower surface is arranged and oil leaking hole is circular arc shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520924976.8U CN205277662U (en) | 2015-11-19 | 2015-11-19 | Needle subassembly and armature of sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520924976.8U CN205277662U (en) | 2015-11-19 | 2015-11-19 | Needle subassembly and armature of sprayer |
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| CN205277662U true CN205277662U (en) | 2016-06-01 |
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| CN201520924976.8U Active CN205277662U (en) | 2015-11-19 | 2015-11-19 | Needle subassembly and armature of sprayer |
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| CN (1) | CN205277662U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762302A (en) * | 2015-11-19 | 2017-05-31 | 联合汽车电子有限公司 | The needle component and armature of fuel injector |
-
2015
- 2015-11-19 CN CN201520924976.8U patent/CN205277662U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762302A (en) * | 2015-11-19 | 2017-05-31 | 联合汽车电子有限公司 | The needle component and armature of fuel injector |
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