CN202451332U - Armature and needle valve component embedded with abrasion resistant retainer ring - Google Patents
Armature and needle valve component embedded with abrasion resistant retainer ring Download PDFInfo
- Publication number
- CN202451332U CN202451332U CN2011205683482U CN201120568348U CN202451332U CN 202451332 U CN202451332 U CN 202451332U CN 2011205683482 U CN2011205683482 U CN 2011205683482U CN 201120568348 U CN201120568348 U CN 201120568348U CN 202451332 U CN202451332 U CN 202451332U
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- armature
- wear
- ring
- resisting back
- needle valve
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses an armature and needle valve component embedded with an abrasion resistant retainer ring. An armature and a needle valve tube are integral, the inner chamber of the armature is step-shaped, a bowl-shaped abrasion resistant retainer ring is embedded into the inner chamber of the armature, the outer wall of the upper portion of the abrasion resistant retainer ring is in interference fit with the inner chamber of the armature, the bottom surface of the abrasion resistant retainer ring is in contact with the bottom of the inner chamber of the armature, and the height difference between the upper end face of the abrasion resistant retainer ring and the end face of the armature is identical to the height of a residual magnetic gap between the armature and needle valve component and an iron core. According to the armature and needle valve component embedded with the abrasion resistant retainer ring, the abrasion resistant retainer ring is utilized for replacing armature end face chromium plating processes which are high in cost and complicated, the abrasion resistance of an impact surface of the component is guaranteed, and further by the aid of the common difference between the inner chamber depth of the cambered surface deformation compensation integration armature located at the bottom of the retainer ring and the height of the abrasion resistant retainer ring, on the premise that the manufacturing accuracy of auxiliary parts is not improved, the residual magnetic gap can be guaranteed. The integration armature is subjected to injection molding by metals, the manufacturing cost is lowered, the degree of freedom of the design is increased, and a long needle valve design can be easily achieved.
Description
Technical field
The utility model relates to the petrol engine electromagnetic valve type fuel injector, specifically belongs to a kind of armature-needle valve assembly of embedded wear-resisting back-up ring.
Background technique
In the electromagnetic valve type fuel injector of petrol engine, armature-needle valve assembly is the moving element and the sealing force transferring elements of solenoid valve, mainly plays magnetic conduction, spacing, transmission spring force and the effect that is connected seal element.Armature-needle valve assembly comprises armature and needle-valve pipe; Mainly contain two kinds of processing modes at present; A kind of is to adopt machining that armature and needle-valve pipe is one-body molded, and another kind is independent machining armature and punching press needle-valve pipe, through laser armature and needle-valve pipe is welded together then.
In the structure that above-mentioned two kinds of processing modes form; All have higher micro-boss of dimension precision requirement or inner conical surface on the armature end face; Make to form the residue magnetic gap between armature and the iron core, when coil blackout,, drive seal element and realize sealing to guarantee that armature breaks away from iron core fast.In addition, armature need carry out hard chromium plating to the end face of armature after carrying out the machining completion, and this is because armature and iron core all are to adopt the lower soft magnetic material of hardness to process, and can't guarantee the hardness and the reliability of armature and iron core collision plane like not chromium plating.
Adopt the integrated armature-needle valve assembly of machining, its amount of machining is very big, and technology is very complicated, and this processing method is not suitable for armature-needle valve assembly of producing than long.And in the method that processing is welded again separately, for size and the form and position tolerance that guarantees the needle-valve pipe, the stamping process of needle-valve pipe and laser welding process are all comparatively complicated.
The model utility content
The utility model technical problem to be solved provides a kind of armature-needle valve assembly of embedded wear-resisting back-up ring, can guarantee the residue magnetic gap between armature and the iron core, reduces the difficulty of processing of product simultaneously.
For solving the problems of the technologies described above; Armature-the needle valve assembly of the embedded wear-resisting back-up ring that the utility model provides; Wherein armature and needle-valve pipe are structure as a whole; The inner chamber of said armature is step-like, and a bowl-shape wear-resisting back-up ring is embedded in the inner chamber of armature, the outer wall on said wear-resisting back-up ring top and the inner chamber interference fit of armature; The bottom surface of wear-resisting back-up ring contacts with the intracavity bottom of armature, and the height difference between the upper-end surface of wear-resisting back-up ring and the armature end face equals the residue magnetic gap between armature-needle valve assembly and the iron core.
Further, said wear-resisting back-up ring sidewall and joint, bottom surface are globoidal structure, have the gap between the inner chamber of itself and armature.
Further, the top open part of said wear-resisting back-up ring is formed with outwardly directed prominent wall, and this prominent wall contacts with the step at armature top.
Further, said wear-resisting back-up ring sidewall is followed successively by one section straight tube sidewall and one section sidewalls from top to bottom; The outer diameter of said straight tube sidewall is greater than the intracavity diameter of armature, and the outer diameter of said sidewalls is less than the intracavity diameter of armature.
Wherein, the bottom of said wear-resisting back-up ring has through hole, and the inner chamber of said through hole and needle-valve pipe connects.
Preferably, said wear-resisting back-up ring is processed by the stainless steel material punching press; The armature of said integrative-structure and needle-valve pipe adopt the metal injection once-through.
The beneficial effect of the utility model is:
1, adopts wear-resisting back-up ring to replace with high costs and complicated armature end face chrome-plated process, guarantee the wearability of armature-needle valve assembly impact face;
2, adopt the wear-resisting back-up ring of bowl structure, globoidal structure is adopted in the back-up ring bottom, through the deformation-compensated integrated armature inner chamber degree of depth of cambered surface and the tolerance of wear-resisting back-up ring height, thereby under the prerequisite that does not improve sub-part accuracy of manufacturing, guarantees the residue magnetic gap;
3, adopt metal injection molded integrated armature, compare traditional machining armature, can reduce manufacture cost, increase design freedom simultaneously, the design of convenient realization minute hand valve.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation:
Fig. 1 is that the armature-needle valve assembly of the utility model is installed in the schematic representation in the oil sprayer;
Fig. 2 is the partial enlarged drawing of frame of broken lines among Fig. 1;
Fig. 3 is wear-resisting back-up ring and the knocked-down schematic perspective view of armature;
Fig. 4 is the partial sectional view of wear-resisting back-up ring;
Fig. 5 is the partial sectional view of the embedded wear-resisting back-up ring of armature;
Fig. 6 is the enlarged view at A place among Fig. 5;
Fig. 7 is the enlarged view at B place among Fig. 5;
Fig. 8 is the tolerance range schematic representation of the armature inner chamber degree of depth;
Fig. 9 a-Fig. 9 f is the assembly technology figure of armature-needle valve assembly;
Figure 10 is the enlarged view at C place among Fig. 9 b;
Figure 11 is the enlarged view at D place among Fig. 9 c;
Figure 12 is the enlarged view at E place among Fig. 9 d;
Figure 13 is the enlarged view at F place among Fig. 9 e;
Figure 14 is the enlarged view at G place among Fig. 9 e;
Figure 15 is the enlarged view at H place among Fig. 9 f;
Figure 16 is the enlarged view at I place among Fig. 9 f.
Wherein description of reference numerals is following:
1 is armature; 2 is wear-resisting back-up ring; 3 is iron core; 4 is spring; 5 are the residue magnetic gap; 6 is mounting base; 7 is pressure head; X is last seal face; Y is following seal face.
Embodiment
Armature-the needle valve assembly of the embedded wear-resisting back-up ring of the utility model is used for electromagnetic valve type fuel injector; As shown in Figure 1, wherein armature and needle-valve pipe adopt the integrated armature of metal injection once-through, and be as shown in Figure 3; The inner chamber of said armature is step-like; A bowl-shape wear-resisting back-up ring 2 is embedded in the inner chamber of armature 1, and the lower end surface of the upper-end surface of wear-resisting back-up ring 2 and iron core 3 is collision plane, and is as shown in Figure 2.
Said wear-resisting back-up ring 2 is processed by the stainless steel material punching press, the outer wall on wear-resisting back-up ring 2 tops and the inner chamber interference fit of armature, and the bottom surface of wear-resisting back-up ring 2 contacts with the intracavity bottom of armature 1, like Fig. 5, shown in Figure 7.Height difference between the upper-end surface of wear-resisting back-up ring 2 and armature 1 end face equals the residue magnetic gap 5 between armature-needle valve assembly and the iron core 3, and is as shown in Figure 2.
As shown in Figure 7, wear-resisting back-up ring 2 sidewalls and joint, bottom surface are globoidal structure, have the gap between the inner chamber of itself and armature 1.As shown in Figure 4, said wear-resisting back-up ring 2 sidewalls are followed successively by one section straight tube sidewall and one section sidewalls from top to bottom; The outer diameter of said straight tube sidewall is greater than the intracavity diameter of armature, and the outer diameter of said sidewalls is less than the intracavity diameter of armature.The top open part of said wear-resisting back-up ring 2 is formed with outwardly directed prominent wall, and this prominent wall contacts with the step at armature 1 top, and is as shown in Figure 6.The bottom of said wear-resisting back-up ring 2 has through hole, and the inner chamber of said through hole and needle-valve pipe connects, and spring 4 is against the bottom of wear-resisting back-up ring 2, and is as shown in Figure 5.
Wear-resisting back-up ring 2 need have been considered 2 points in design process, the one, and the raising armature-wearability of working surface when needle valve assembly clashes into iron core 3, the 2nd, between armature-needle valve assembly and iron core 3, form accurate in size residue magnetic gap.
To first point, the wear-resisting back-up ring 2 of the utility model is chosen the martensite stainless steel material with certain degree of hardness, and after punching press, heat-treats, and guarantees the hardness and the wear-resistant requirement of material self.On the structure, wear-resisting back-up ring 2 adopts bowl structure, and bottom support is on the intracavity bottom of integrated armature 1, and the inner chamber interference fit of straight tube sidewall and integrated armature 1.The rim of a bowl place adopts the prominent wall of flange, has increased the surface area of wear-resisting back-up ring 2 impact faces, can guarantee like this in the oil sprayer Life cycle, and the position of impact face and surface quality change in tolerance interval.Consider the assembling capacity of assembly, lower half portion of wear-resisting back-up ring 2 is a sidewalls, guarantees the guidance quality when wear-resisting back-up ring 2 is pressed into integrated armature 1 so on the one hand, reduces the length of interference fit face on the other hand, regulates being pressed into the power size.
To second point, the residue magnetic gap is 5 very little, and (0.01～0.03mm) and precision high (be generally ± 0.005), the machining accuracy of wear-resisting back-up ring 2 and integrated armature 1 can't guarantee.The utility model is a globoidal structure in the bottom of wear-resisting back-up ring 2; As shown in Figure 4; Size design through wear-resisting back-up ring 2 and integrated armature 1 also cooperates the assembly method of armature-needle valve assembly; Make wear-resisting back-up ring 2 cooperate the variable height of integrated armature 1 inner chamber and produce a certain amount of deformation, guarantee that under the prerequisite of the requirement on machining accuracy that does not improve part the dimensional accuracy of residue magnetic gap reaches requirement.
For this reason, the moulding assembly method of armature-needle valve assembly that the utility model provides may further comprise the steps:
1) adopt the metal injection once-through with armature and being integral of needle-valve control armature 1;
2) the wear-resisting back-up ring 2 of punching press;
3) integrated armature 1 is fixedly mounted in the mounting base 6, shown in Fig. 9 a; Mounting base 6 is a hollow structure, and its inner chamber is provided with annular boss with fixed armature 1;
4) wear-resisting back-up ring 2 is packed in the integrated armature 1, because lower half portion is a sidewalls, and auxiliary suitable work feeder, wear-resisting back-up ring 2 centerings, and begin to contact with integrated armature 1 inner chamber, like Fig. 9 b, shown in Figure 10;
5) pressure head 7 and wear-resisting back-up ring 2 centerings, and prepare to be pressed into, shown in Fig. 9 c; Said pressure head 7 is the multidiameter shaft structure, comprises head, middle part and afterbody, and said head inserts in the through hole of wear-resisting back-up ring 2 bottoms, and the middle part contacts with the inwall of wear-resisting back-up ring 2, and afterbody has the cavity that plugs work feeder.Being connected on the end face (to call second junction surface in the following text) of said pressure head 7 middle parts and afterbody has a groove, and be shown in figure 11, and the degree of depth of said groove is identical with the height of residue magnetic gap 5;
6) pressure head 7 is pressed in the wear-resisting back-up ring 2, wear-resisting back-up ring 2 is moved downward, like Fig. 9 d, shown in Figure 12 in the inner chamber of integrated armature 1;
7) bottom surface of wear-resisting back-up ring 2 contacts with the intracavity bottom of armature 1, like Fig. 9 e, shown in Figure 14, because the degree of depth of integrated armature 1 inner chamber has certain tolerance; Therefore the distance of the upper-end surface of wear-resisting back-up ring 2 and integrated armature 1 end face is greater than desired residue magnetic gap; Shown in figure 13, this moment is because the bottom cambered surface of wear-resisting back-up ring 2 can provide the certain deformation amount, so pressure head 7 can continue to move downward; The globoidal structure distortion of wear-resisting back-up ring 2 bottoms; Second junction surface until pressure head 7 contacts with the end face of armature, and is shown in figure 15, and the height difference of the end face of the upper-end surface of wear-resisting back-up ring 2 and integrated armature 1 is the degree of depth of groove; Also just equal to remain the height of magnetic gap 5, shown in Fig. 9 f.
The tolerance range of the integrated armature 1 inner chamber degree of depth shown in Figure 8; Far Left is the maximum inner chamber degree of depth, and rightmost is the minimum inner chamber degree of depth, and wherein pressure head 7 all is a sintered-carbide die with mounting base 6; Have high dimension precision, and in die life, have good stability.The processing dimension of the said integrated armature inner chamber degree of depth does
Wear-resisting back-up ring upper-end surface with the processing dimension of the distance of the bottom surface that contacts with the armature inner chamber does
The bottom thickness of wear-resisting back-up ring is T
Ring, the height of residue magnetic gap is H
Magnetic gap, the distance between connection end face at pressure head head and middle part (to call first junction surface in the following text) and the pressure head bottom portion of groove is L
Pin, it is δ, wherein α that the maximum of wear-resisting back-up ring allows amount of deformation
1, α
2, β
1, β
2Be on the occasion of, first end face of pressure head 7 and the distance of integrated armature 1 intracavity bottom were L after assembling was accomplished
Gap, so on the length direction,
Shown in Fig. 9 d, the size relationship before assembling is accomplished is L
Gap_origni al+ L
Pin=L
Ring,
After assembling was accomplished, as shown in Figure 8, size relationship was L
Gap_assemb lied+ L
Pin=L
Armature+ H
Magnetic gap,
Because L
Gap_origni al>=L
Gap_assemb lied>=T
Ring, L
PinBe fixed value, the height H of residue magnetic gap
Magnetic gapBe the definite value of requirement, can derive from formula:
L
Gap_origni al-L
Gap_assemb lied=L
Ring-(L
Armature+ H
Magnetic gap)
Therefore, when the design size chain, guarantee:
L
Ring-β
2>=L
Armature+ α
1+ H
Magnetic gap
L
Ring+ β
1-(L
Armature-α
2+ H
Magnetic gap)≤δ
L
Pin≤L
Armature-α
2+ H
Magnetic gap-T
Ring
In the utility model; The inner bevel of wear-resisting back-up ring 2 lower half portion sidewalls is more than or equal to the oblique angle of seal face Y under the pressure head; Like this in assembly process 6) be pressed into the starting stage, the inclined-plane of sidewall lower half portion of wear-resisting back-up ring 2 is stressed, and the inner bevel of sidewalls increases gradually and is equal with the oblique angle of following seal face Y; Shown in figure 16, so that enough supports to be provided.Simultaneously, L
RingIncrease contacts until the upper-end surface of wear-resisting back-up ring 2 and the last seal face X of pressure head, and this moment, wear-resisting back-up ring 2 was under pressure at two ends up and down, kept stable shape to move downward, this moment L
Ring=L
Gap_origni al+ L
Pin, and the tolerance of size of wear-resisting back-up ring is compensated.
In the utility model, adopt wear-resisting back-up ring to replace with high costs and complicated armature end face chrome-plated process, guarantee the wearability of armature-needle valve assembly impact face; Wear-resisting back-up ring adopts bowl structure, and globoidal structure is adopted in the back-up ring bottom, through the deformation-compensated integrated armature inner chamber degree of depth of cambered surface and the tolerance of wear-resisting back-up ring height, thereby under the prerequisite that does not improve sub-part accuracy of manufacturing, guarantees the residue magnetic gap; Integrated armature adopts metal injection molded, compares traditional machining armature, can reduce manufacture cost, increases design freedom simultaneously, the design of convenient realization minute hand valve.
More than through specific embodiment the utility model has been carried out detailed explanation, this embodiment only is the preferred embodiment of the utility model, it is not that the utility model is limited.Under the situation that does not break away from the utility model principle, equivalent replacement and improvement that those skilled in the art makes armature-needle valve assembly etc. all should be regarded as in the technological category that the utility model is protected.
Claims (7)
1. armature-the needle valve assembly of an embedded wear-resisting back-up ring; Wherein armature and needle-valve pipe are structure as a whole; It is characterized in that: the inner chamber of said armature is step-like, and a bowl-shape wear-resisting back-up ring is embedded in the inner chamber of armature, the outer wall on said wear-resisting back-up ring top and the inner chamber interference fit of armature; The bottom surface of wear-resisting back-up ring contacts with the intracavity bottom of armature, and the height difference between the upper-end surface of wear-resisting back-up ring and the armature end face equals the residue magnetic gap between armature-needle valve assembly and the iron core.
2. armature-the needle valve assembly of embedded wear-resisting back-up ring according to claim 1, it is characterized in that: said wear-resisting back-up ring sidewall and joint, bottom surface are globoidal structure, have the gap between the inner chamber of itself and armature.
3. armature-the needle valve assembly of embedded wear-resisting back-up ring according to claim 1, it is characterized in that: the top open part of said wear-resisting back-up ring is formed with outwardly directed prominent wall, and this prominent wall contacts with the step at armature top.
4. armature-the needle valve assembly of embedded wear-resisting back-up ring according to claim 1 is characterized in that: said wear-resisting back-up ring sidewall is followed successively by one section straight tube sidewall and one section sidewalls from top to bottom; The outer diameter of said straight tube sidewall is greater than the intracavity diameter of armature, and the outer diameter of said sidewalls is less than the intracavity diameter of armature.
5. armature-the needle valve assembly of embedded wear-resisting back-up ring according to claim 1, it is characterized in that: the bottom of said wear-resisting back-up ring has through hole, and the inner chamber of said through hole and needle-valve pipe connects.
6. armature-the needle valve assembly of embedded wear-resisting back-up ring according to claim 1, it is characterized in that: said wear-resisting back-up ring is processed by the stainless steel material punching press.
7. armature-the needle valve assembly of embedded wear-resisting back-up ring according to claim 1 is characterized in that: the armature of said integrative-structure and the once-through of needle-valve pipe employing metal injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205683482U CN202451332U (en) | 2011-12-30 | 2011-12-30 | Armature and needle valve component embedded with abrasion resistant retainer ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205683482U CN202451332U (en) | 2011-12-30 | 2011-12-30 | Armature and needle valve component embedded with abrasion resistant retainer ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202451332U true CN202451332U (en) | 2012-09-26 |
Family
ID=46867200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205683482U Expired - Lifetime CN202451332U (en) | 2011-12-30 | 2011-12-30 | Armature and needle valve component embedded with abrasion resistant retainer ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202451332U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184959A (en) * | 2011-12-30 | 2013-07-03 | 联合汽车电子有限公司 | Armature-needle valve assembly, and molding assembling method and assembling tool thereof |
| GB2590480A (en) * | 2019-12-19 | 2021-06-30 | Delphi Automotive Systems Lux | Fuel injector for an internal combustion engine |
-
2011
- 2011-12-30 CN CN2011205683482U patent/CN202451332U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184959A (en) * | 2011-12-30 | 2013-07-03 | 联合汽车电子有限公司 | Armature-needle valve assembly, and molding assembling method and assembling tool thereof |
| CN103184959B (en) * | 2011-12-30 | 2017-01-18 | 联合汽车电子有限公司 | Armature-needle valve assembly, and molding assembling method and assembling tool thereof |
| GB2590480A (en) * | 2019-12-19 | 2021-06-30 | Delphi Automotive Systems Lux | Fuel injector for an internal combustion engine |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |