CN108561251B - Method for assembling oil injector - Google Patents
Method for assembling oil injector Download PDFInfo
- Publication number
- CN108561251B CN108561251B CN201810184718.9A CN201810184718A CN108561251B CN 108561251 B CN108561251 B CN 108561251B CN 201810184718 A CN201810184718 A CN 201810184718A CN 108561251 B CN108561251 B CN 108561251B
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- Prior art keywords
- groove
- lead
- valve core
- valve
- adjusting screw
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 239000000306 component Substances 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims abstract description 18
- 239000008358 core component Substances 0.000 claims abstract description 14
- 239000000446 fuel Substances 0.000 claims description 45
- 230000004044 response Effects 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 33
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010724 circulating oil Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005288 electromagnetic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to the technical field of automobile parts, in particular to an assembling method of an oil sprayer, which comprises the following steps: s1, forming a wiring component (8); s2, forming a coil component (7); s3, forming a driving assembly; s4, forming a valve core component (5); s5, assembling the valve core (22) into a valve core installation cavity (27) of the valve body (1); s6, clamping a first sealing ring (49) in the first annular groove (48); s7, placing the driving assembly in the valve body (1) and sleeving the coil framework (33) in the armature seat (24); s8, clamping a second sealing ring (51) in the second annular groove (50); s9, inserting the circular column (4) into the coil framework (33); s10, placing the spring (11) in the circular column (4). The invention provides an assembling method of an oil sprayer, which ensures the product quality and also has simple and convenient process.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to an assembling method of an oil sprayer.
Background
The fuel injector is mainly used for changing a fixed amount of fuel from liquid state into mist state, and then mixing the mist with air, so that one of the parts commonly used in the automobile field is formed.
Prior art fuel injectors typically employ electromagnetic effects to control their opening and closing. For example, a gasoline engine rotational flow type electric control fuel injector (application publication number CN 101806265a) disclosed by the national intellectual property office is composed of: the valve comprises an end cover, an iron core, a reset spring, an armature, a valve rod, a valve core and a valve seat which are sequentially connected in the axial direction, and further comprises a coil framework, a coil, a shell, a guide sleeve and a spray hole, wherein the coil framework and the coil are arranged on the periphery of the iron core, the shell is arranged on the periphery of the coil, and the guide sleeve is movably matched with the valve. The fuel injector disclosed in this patent has the following disadvantages:
1. the distance between the iron core and the armature iron, namely the stroke, is fixed, and the elastic force of the return spring is fixed and unchanged, so that the response time of the fuel injector cannot be adjusted after the fuel injector is assembled, and the fuel injector cannot adapt to specific working conditions to be adjusted.
2. The wiring mode of the oil injector is that the oil injector enters from the upper end wiring of the oil injector, so that the assembly above the oil injector is influenced; and the power connection mode is complex and is not easy to be connected.
3. The spray hole of the oil injector is only a through hole, so that the atomization effect of the oil injector is to be improved.
4. The assembly process of the fuel injector is complicated.
Disclosure of Invention
The present invention is directed to solving one of the above problems.
The invention aims to solve the technical problem of providing the oil sprayer assembling method which ensures the product quality and also has simple and convenient process.
In order to solve the technical problem, the assembling method of the fuel injector disclosed by the application comprises the following steps:
s1, forming a wiring component: the base and the two wiring terminals are subjected to injection molding to obtain a wiring part, and the wiring terminal part is positioned in the inner ring hole;
s2, forming a coil component: fixing a coil in a winding slot, wherein two leads of the coil are respectively positioned in the narrow openings of the two lead slots;
s3, forming a driving assembly: the inner ring hole of the base is sleeved on the annular mounting part, and one end of the wiring terminal, which is far away from the plug interface, can be bent into the lead groove under the abutting action of the end surface of the lead groove; then bending the lead and the wiring terminal, placing the lead and the wiring terminal in the accommodating groove and welding the lead and the wiring terminal; then injecting glue into the lead groove and the accommodating groove;
s4, forming a valve core component: fixing the armature seat on a clamp, and connecting the end part of the valve core with the clamping groove in an interference fit manner by using a press-fitting tool on the sunken step surface;
s5, assembling the valve core into a valve core installation cavity of the valve body, acting on the end face of the valve core installation cavity by adopting a press-fitting tool, and connecting the throttling block with the installation groove in an interference fit manner;
s6, clamping the first sealing ring in a first annular groove in the valve body;
s7, placing the driving assembly in the valve body and sleeving the coil framework in the armature seat;
s8, clamping a second sealing ring in a second annular groove in the coil framework;
s9, inserting the circular column into the coil framework, and fixedly connecting the valve cover with the valve body;
s10, a spring is placed in the circular column, a third sealing ring is clamped in a third annular groove in the adjusting screw, and the adjusting screw is in threaded connection with the valve cover.
After the method is adopted, the following advantages are achieved:
1. the two leads are respectively positioned in the narrow openings of the lead grooves of the two lead grooves, so that the phenomenon that the connecting terminal in the next step possibly collides with the leads after plastic deformation to enable the leads to slide to the bottom ends of the lead grooves is avoided, and paving is well performed for the next step;
2. one end of the wiring terminal, which is far away from the interface, can be bent into the lead groove under the abutting action of the end surfaces of the lead groove, so that the wiring terminal can be bent automatically, the assembly is convenient, and the assembly efficiency is improved;
3. the press-fitting tool acts on the sunken step surface, so that the valve core is prevented from deforming during assembly due to the fact that the wall thickness of the valve core at the position of the sunken step surface is larger, and the product quality of the oil sprayer is guaranteed;
4. the press-fitting tool acts on the end face of the valve core mounting cavity, so that the end face of the valve core mounting cavity is not an important end face, and the press-fitting tool acts on the end face, so that the assembly is facilitated, and the product quality is not influenced; the throttling block is connected with the mounting groove in an interference fit mode, so that the throttling block cannot be integrally formed with the valve core, the throttling block cannot be assembled on the valve body if the throttling block and the valve core are integrally formed, the strength of the connecting structure can be guaranteed through the interference fit connection, and the process is convenient;
therefore, the steps of the fuel injector assembling method are buckled, the process is simple and convenient on the basis of ensuring the product quality, namely, a novel fuel injector assembling method is generated, and the fuel injector assembling method has prominent substantive characteristics and remarkable progress.
Preferably, in the step S9, the step of fixedly connecting the valve cover to the valve body means that the edge of the valve cover is bent and formed to form a flange which is clamped on the limit flange of the valve body. Therefore, the mode of bending and forming the flanging adopts a plastic forming mode, the structure is stable, and the forming is convenient.
Preferably, the fuel injector assembling method further includes the steps of:
s11, debugging: testing the power-on response time of the oil sprayer, and screwing the adjusting screw outwards if the power-on response time obtained by the test is smaller than a preset value range; if the electrifying response time obtained by the test is larger than the preset value range, the adjusting screw is screwed inwards; and stopping screwing the adjusting screw until the electrifying response time obtained by the test meets the preset value range. Therefore, the method can be debugged before delivery to form a product. Of course, different preset range values can be specifically formulated according to different requirements of customers, so that products with different parameters can be adjusted, and diversified requirements of the products are met.
Preferably, the fuel injector assembling method further includes the steps of:
s12, after debugging is completed, glue is dripped into the threaded connection position of the adjusting screw and the valve cover. Therefore, the adjusting screw cannot loosen and change in position when in use, and the use stability of the oil sprayer is guaranteed.
Between step S11 and step S12, the method further includes: and blocking a flow port on the adjusting screw by using a plug. Therefore, the glue is dripped into the flow inlet, so that the glue is prevented from flowing into the flow inlet to influence the inside of the oil sprayer.
Drawings
FIG. 1 is a schematic diagram of a fuel injector to be assembled in accordance with the method of the present invention.
FIG. 2 is a schematic, fragmentary view of a fuel injector to be assembled by the method of the present invention.
FIG. 3 is a schematic cross-sectional view of a fuel injector to be assembled in accordance with the method of the present invention.
Fig. 4 is an enlarged schematic view at a in fig. 3.
FIG. 5 is a schematic structural diagram of the inner ring hole of the fuel injector to be assembled by the method of the present invention in the process of being sleeved with the annular mounting part.
Fig. 6 is an enlarged schematic view at B in fig. 5.
Fig. 7 is a schematic structural view of the end portions of the terminal and the lead of the injector to be assembled by the method of the present invention being accommodated in the accommodating groove.
FIG. 8 is a schematic diagram of a fuel injector coil and bobbin assembly constructed in accordance with the method of the present invention.
Fig. 9 is an enlarged schematic view at C in fig. 8.
FIG. 10 is a schematic view of a fuel injector having a limit projection to be assembled by the method of the present invention.
FIG. 11 is a schematic diagram of the construction of the wiring members in a fuel injector to be assembled by the method of the present invention.
FIG. 12 is a flow chart of a method of assembling a fuel injector of the present invention.
Wherein:
1. a valve body; 2. an oil injection port; 3. a valve cover; 4. a circular column; 5. a valve core component; 6. spacing; 7. a coil component; 8. a wiring member; 9. an adjusting screw; 10. a spout; 11. a spring; 12. an axial extension; 13. an oil outlet; 14. a throttle block; 15. mounting grooves; 16. an inner side surface; 17. a first convex arc surface; 18. a first concave arc surface; 19. an outer side surface; 20. a second concave arc surface; 21. a second convex arc surface; 22. a valve core; 23. an inner bore; 24. an armature base; 25. a limiting ring; 26. a card slot; 27. a valve core mounting cavity; 28. an armature seat mounting cavity; 29. sinking the step surface; 30. an oil passage; 31. a coil; 32. a winding slot; 33. a coil bobbin; 34. a lead slot; 35. a lead wire; 36. a base; 37. a wiring terminal; 38. an interface; 39. a circular mounting part; 40. an inner ring hole; 41. a wide opening part of the lead groove; 42. a narrow opening of the lead groove; 43. a limiting bulge; 44. a clamping port; 45. a containing groove; 46. a limiting groove; 47. a limiting block; 48. a first annular groove; 49. a first seal ring; 50. a second annular groove; 51. a second seal ring; 52. a third annular groove; 53. a third seal ring; 54. a limiting flange; 55. and (5) flanging.
Detailed Description
The inventive concepts of the present disclosure will be described hereinafter using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of their inclusion to those skilled in the art. It should also be noted that these embodiments are not mutually exclusive. A component, step, or element from one embodiment may be assumed to be present or used in another embodiment. The particular embodiments shown and described may be substituted for a wide variety of alternate and/or equivalent implementations without departing from the scope of the embodiments of the present disclosure. This application is intended to cover any adaptations or variations of the embodiments discussed herein. It will be apparent to those skilled in the art that alternative embodiments may be practiced using only some of the described aspects. Specific numbers, materials, and configurations are set forth in the examples for the purpose of illustration, however, alternative examples may be practiced by those skilled in the art without these specific details. In other instances, well-known features may be omitted or simplified in order not to obscure the illustrative embodiments.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is noted that the terms "provided with", "mounted with" and "mounted with" unless expressly stated or limited otherwise,
"connected" and "connected" are to be understood in a broad sense, e.g., they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the term "fixed" may be a bolted and/or screwed connection and/or a snap and/or a weld, which term is understood by a person skilled in the art as a matter of fact to have a special meaning in the present invention.
Referring to FIGS. 1-11, a fuel injector to be assembled according to the method of the present application includes
The fuel injection valve comprises a valve body 1, wherein one end of the valve body 1 is provided with a fuel injection port 2;
the valve cover 3 is fixedly connected with the valve body 1, the inner side of the valve cover 3 is provided with a circular column 4 extending towards the direction of the oil injection port 2,
the valve core component 5 is connected in the valve body 1 in a sliding manner, a gap 6 is formed between the valve core component 5 and the circular column 4 in a normal state, and one end of the valve core component 5 is tightly abutted against the oil injection port 2 and seals the oil injection port 2;
the driving component is used for driving the valve core component 5 to act; the driving assembly comprises a coil component 7 used for magnetizing the circular column 4 when being electrified and a wiring component 8 used for electrifying the coil component 7, wherein the coil component 7 is fixed on the outer circumferential surface of the circular column 4, the wiring component 8 is fixedly connected with the coil component 7, and the valve core component 5 moves towards the circular column 4 after the circular column 4 is magnetized;
the fuel injector also comprises
An adjusting screw 9, wherein the adjusting screw 9 is in threaded connection with the valve cover 3, and the adjusting screw 9 is provided with a flow opening 10 for circulating oil into the valve core component 5;
and one end of the spring 11 is tightly abutted to the valve core part 5, and the other end of the spring 11 is tightly abutted to the adjusting screw 9.
After adopting above-mentioned structure, have following advantage: on the one hand, the adjusting screw 9 can be adjusted according to actual working condition requirements, so that the requirements of specific working conditions are met. On the other hand, different preset range values of the power-on response time can be set according to different requirements of customers, products with different power-on response times can be obtained by adjusting the adjusting screws 9, and diversified requirements of the products are met. That is to say, the same structure is adopted, and products with different electrifying response time can be obtained only by adjusting the adjusting screw 9, so that the production cost is saved, and the adjustment is convenient.
As shown in fig. 3, the valve body 1 has an axial extension portion 12 at one end of the oil injection port 2, an end portion of the axial extension portion 12 has an oil outlet 13 expanding outward, the oil outlet 13 is communicated with the oil injection port 2, a throttle block 14 is fixedly connected to the top of the valve core member 5, the throttle block 14 is located at the position of the oil outlet 13, and a distance H in the axial direction between the throttle block 14 and the oil outlet 13 is greater than a distance 6. The distance H in the axial direction between the throttling block 14 and the oil outlet 13 is 1.3 times to 5 times of the interval 6. For example: the distance H is 1.3 times or 2 times or 3 times or 5 times the spacing 6.
The top of the valve core component 5 is fixedly connected with a throttling block 14, that is, the top of the valve core component 5 is provided with an installation groove 15, and the throttling block 14 is connected with the installation groove 15 in an interference fit manner.
As shown in fig. 4, the oil outlet 13 has an inner side surface 16, an end of the inner side surface 16 is a first convex arc surface 17, an end of the inner side surface 16 close to the outer side is a first concave arc surface 18, and the first convex arc surface 17 is tangent to the first concave arc surface 18; one side of the throttling block 14 facing the inner side surface 16 is an outer side surface 19, one end of the outer side surface 19 close to the inner side is a second concave arc surface 20, one end of the outer side surface 19 close to the outer side is a second convex arc surface 21, and the second convex arc surface 21 is in tangent connection with the second concave arc surface 20. Thus, when fuel is injected, the engagement between the inner surface 16 and the outer surface 19 forms a tumble-like oil mist, thereby improving fuel performance.
The valve core component 5 comprises a valve core 22 and a columnar armature seat 24 with an inner hole 23, a limiting ring 25 is convexly arranged on the peripheral surface of the inner hole 23, and the limiting ring 25 of the spring 11 is abutted; the limiting ring 25 and the inner hole 23 form a clamping groove 26, the end part of the valve core 22 is connected with the clamping groove 26 in an interference fit manner, a valve core mounting cavity 27 and an armature seat mounting cavity 28 are arranged on the valve body 1, the valve core 22 is connected in the valve core mounting cavity 27 in a sliding manner, and the armature seat 24 is connected in the armature seat mounting cavity 28 in a sliding manner.
The outer peripheral surface of the valve core 22 is provided with a sunken step surface 29, and the sunken step surface 29 and the side surface of the valve core installation cavity 27 form an oil passage 30.
The coil component 7 comprises a coil 31 and a coil bobbin 33 with a winding slot 32, wherein the coil 31 is fixed in the winding slot 32; the coil framework 33 is sleeved on the circular column 4, two lead slots 34 are arranged in parallel on one side of the coil framework 33 away from the oil injection port 2, the coil 31 is provided with two leads 35, and the two leads 35 are respectively positioned in the two lead slots 34; the wiring component 8 comprises a base 36 and two wiring terminals 37, wherein a plug 38 is arranged on the side surface of the base 36, the base 36 is sleeved with the top end of the coil frame 33, the two wiring terminals 37 are fixed on the base 36, one end of each wiring terminal 37 is connected with the lead 35, and the other end of each wiring terminal 37 is located in the plug 38. The base 36 and the coil framework 33 can be conveniently assembled by sleeving the base 36 with the top end of the coil framework 33, and the inserting port 38 is located on the side face of the base 36, so that power can be supplied to the wiring of the fuel injector from the side face, and the inconvenience in assembling the fuel injector and other installation parts caused by wiring from the top end of the fuel injector in the prior art is avoided.
The base 36 is connected with the top end of the coil framework 33 in a sleeved mode, namely, the top end of the coil framework 33 is provided with a circular installation portion 39, the base 36 is provided with an inner ring hole 40 matched with the circular installation portion 39, the inner ring hole 40 is connected with the circular installation portion 39 in a sleeved mode, and the lead wire groove 34 is located in the circular installation portion 39. Thus, during assembly, the inner ring hole 40 is sleeved on the annular mounting part 39 to complete assembly, and assembly is convenient.
The length of one end of the wiring terminal 37, which is far away from the plug port 38, is greater than the height of the annular mounting portion 39 in the axial direction, when the inner ring hole 40 is sleeved on the annular mounting portion 39, one end of the wiring terminal 37, which is far away from the plug port 38, is bent into the lead groove 34 under the abutting action of the end surfaces of the lead groove 34, and the wiring terminal 37 is welded with the lead 35. After the structure is combined, because the length of one end of the wiring terminal 37, which is far away from the plug port 38, is greater than the height of the annular mounting portion 39 in the axial direction, the wiring terminal 37 is partially positioned in the inner ring hole 40, during assembly, because the size of the wiring terminal 37 is small and the wiring terminal 37 can be plastically deformed, when the inner ring hole 40 is sleeved with the annular mounting portion 39, one end of the wiring terminal 37, which is far away from the plug port 38, can be automatically bent into the lead groove 34 under the abutting action of the end surface of the lead groove 34, so that manual bending of the wiring terminal is avoided, and the assembly efficiency is improved.
As shown in fig. 9, the lead groove 34 includes a lead groove wide opening portion 41 and a lead groove narrow opening portion 42 which are communicated together, the lead groove wide opening portion 41 has a width larger than that of the lead groove narrow opening portion 42, the lead groove wide opening portion 41 is located outside the lead groove narrow opening portion 42, the lead 35 is located in the lead groove narrow opening portion 42, and the end portion of the connection terminal 37 far away from the socket 38 has a width larger than that of the lead groove second portion 42 but smaller than that of the lead groove wide opening portion 41. When such a structure is not employed, there is a possibility that the following problems may occur: during assembly, the inner ring hole 40 and the circular ring-shaped mounting portion 39 move relatively in the process that the inner ring hole 40 and the circular ring-shaped mounting portion 39 are sleeved, and the connecting terminal 37 may collide with the lead 35 after plastic deformation to enable the lead 35 to slide to the bottom end of the lead groove 34, so that welding is affected. Or a person is required to pull the lead 35 during assembly, thereby affecting the assembly efficiency. After the structure is adopted, the lead 35 is positioned in the narrow opening part 42 of the lead groove, and during assembly, the wiring terminal 37 cannot abut against the second part 42 of the lead groove, so that the wiring terminal 37 cannot abut against the lead 35 after plastic deformation, and the lead 35 is not affected.
Or, as shown in fig. 10, the two inner side walls of the lead groove 34 are oppositely provided with limiting protrusions 43, the limiting protrusions 43 form a clamping opening 44, the lead 35 is located at the inner end of the clamping opening 44, and the width of the end of the terminal 37 far away from the socket 38 is larger than the width of the clamping opening 44 but smaller than the width of the lead groove 34. After adopting this kind of structure, lead wire 35 is located the inner of centre gripping mouth 44, and during the assembly, binding post 37 can not contradict to the inner of centre gripping mouth 44, so binding post 37 can not contradict lead wire 35 after plastic deformation to lead wire 35 is not influenced.
As shown in fig. 7, two receiving grooves 45 are formed in the upper end surface of the base 36 at corresponding positions of the two lead grooves 34, the terminals 37 and the ends of the leads 35 are received in the receiving grooves 45, and the receiving grooves 45 and the lead grooves 34 are filled with glue. Therefore, on one hand, the accommodating groove 45 can reserve space for the welding work of the wiring terminal 37 and the lead 35, and the welding process is convenient; on the other hand, the end portions of the connection terminal 37 and the lead 35 are accommodated in the accommodation groove 45, so that the connection terminal is prevented from being influenced by the outside, the occupation of the end portions of the connection terminal 37 and the lead 35 on the assembly is also avoided, and the positions of the components are reasonably arranged.
As shown in fig. 5, 7, 8 and 11, a positioning structure is arranged between the base 36 and the annular mounting portion 39; the locating structure comprises a limiting groove 46 arranged on the circular ring-shaped mounting part 39 and a limiting block 47 arranged on the base 36, and the limiting block 47 is connected with the limiting groove 46 in a clamping mode. Of course, the positions of the limiting block 47 and the limiting groove 46 can be interchanged. Therefore, the inner ring hole 40 and the circular ring-shaped mounting part 39 can be accurately positioned when being assembled, so that one end of the wiring terminal 37, which is far away from the plug interface 38, is just bent into the lead groove 34 under the abutting action of the end surface of the lead groove 34, and the assembly is convenient. In addition, when the fuel injector is used, the positioning structure can ensure that the base 36 and the annular mounting part 39 are relatively stable, and the working stability is ensured.
A first liquid sealing structure is arranged between the coil framework 33 and the valve body 1; the first liquid sealing structure comprises a first annular groove 48 arranged in the valve body 1 and a first sealing ring 49 clamped in the first annular groove 48.
A second liquid sealing structure is arranged between the coil framework 33 and the circular column 4; the second hydraulic sealing structure comprises a second annular groove 50 arranged at the inner end of the coil framework 33 and a second sealing ring 51 clamped in the second annular groove 50.
A third liquid sealing structure is arranged between the adjusting screw 9 and the circular column 4; the third liquid sealing structure comprises a third annular groove 52 arranged on the outer peripheral surface of the adjusting screw 9 and a third sealing ring 53 clamped in the third annular groove 52.
The valve cover 3 is fixedly connected with the valve body 1, that is, the end of the valve body 1 is provided with a limiting flange 54 which is arranged outwards, the valve cover 3 is provided with a flange 55 which is formed by bending at the position of the limiting flange 54, and the flange 55 is clamped with the limiting flange 54. Thus, the plastic forming mode has the advantages of stable structure and low cost.
Referring to fig. 12, the method for assembling the fuel injector includes the following steps:
s1. forming a wiring member 8: the base 36 and the two terminals 37 are injection molded to obtain the terminal member 8 with the terminals 37 partially positioned in the inner ring hole 40;
s2, forming a coil component 7: fixing the coil 31 in the winding slot 32, wherein two leads 35 of the coil 31 are respectively positioned in the lead slot narrow openings 42 of the two lead slots 34;
s3, forming a driving assembly: the inner ring hole 40 of the base 36 is sleeved on the annular mounting part 39, and one end of the wiring terminal 37, which is far away from the plug port 38, can be bent into the lead groove 34 under the abutting action of the end surface of the lead groove 34; then, the lead 35 and the wiring terminal 37 are bent and placed in the accommodating groove 45 and welded; then, glue is poured into the lead wire groove 34 and the accommodating groove 45;
s4, forming a valve core component 5: fixing the armature seat 24 on the fixture, and enabling the end part of the valve core 22 to be in interference fit connection with the clamping groove 26 under the action of a press-fitting tool on the sunken step surface 29;
s5, assembling the valve core 22 into the valve core installation cavity 27 of the valve body 1, acting on the end face of the valve core installation cavity 27 by adopting a press-fitting tool, and connecting the throttling block 14 with the installation groove 15 in an interference fit manner;
s6, clamping the first sealing ring 49 in the first annular groove 48;
s7, placing the driving assembly in the valve body 1, and sleeving the coil framework 33 in the armature seat 24;
s8, clamping a second sealing ring 51 in the second annular groove 50;
s9, inserting the circular column 4 into the coil framework 33, and fixedly connecting the valve cover 3 with the valve body 1;
s10, the spring 11 is placed in the circular column 4, the third sealing ring 53 is clamped in the third annular groove 52, and the adjusting screw 9 is in threaded connection with the valve cover 3.
After the method is adopted, the following advantages are achieved:
1. the two leads 35 are respectively positioned in the narrow lead slot parts 42 of the two lead slots 34, so that the phenomenon that the connecting terminal 37 in the later step possibly collides with the leads 35 after plastic deformation to enable the leads 35 to slide to the bottom ends of the lead slots 34 can be avoided, and paving is carried out for the later step;
2. one end of the connecting terminal 37, which is far away from the plug 38, can be bent into the lead groove 34 under the abutting action of the end surfaces of the lead groove 34, so that the connecting terminal 37 can be bent automatically, and therefore assembly is convenient and assembly efficiency is improved;
3. the press-fitting tool acts on the sunken step surface 29, so that the valve core 22 is prevented from deforming in assembly due to the fact that the wall thickness of the valve core 22 at the position of the sunken step surface 29 is large, and the product quality of the fuel injector is guaranteed;
4. the press-fitting tool acts on the end face of the valve core mounting cavity 27, and the press-fitting tool is convenient to assemble and does not influence the product quality when acting on the end face of the valve core mounting cavity 27 because the end face of the valve core mounting cavity 27 is not an important end face; the throttling block 14 is connected with the mounting groove 15 in an interference fit mode, so that the throttling block 14 cannot be integrally formed with the valve core 22, if the throttling block 14 and the valve core 22 are integrally formed, the throttling block cannot be assembled on the valve body 1, the strength of the connecting structure can be guaranteed through the interference fit connection, and the process is convenient;
therefore, the steps of the fuel injector assembling method are buckled, the process is simple and convenient on the basis of ensuring the product quality, namely, a novel fuel injector assembling method is generated, and the fuel injector assembling method has prominent substantive characteristics and remarkable progress.
In step S3, the lead 35 may be connected to the connection terminal 37, bent into the accommodation groove 45, and then soldered; of course, the lead 35 may be connected to the terminal 37, soldered, bent, and placed in the receiving groove 45. The person skilled in the art may choose from the specific case, and the application is not specifically limited to this.
The step S9 of fixedly connecting the valve cover 3 to the valve body 1 means that the edge of the valve cover 3 is bent and formed to form the flange 55 to be clamped on the limit flange 54 of the valve body 1. In this way, the flanging 55 is formed by bending and molding in a plastic molding manner, so that the structure is stable and the molding is convenient.
The assembling method of the fuel injector further comprises the following steps:
s11, debugging: testing the power-on response time of the oil sprayer, and screwing the adjusting screw 9 outwards if the power-on response time obtained by the test is smaller than a preset value range; if the electrifying response time obtained by the test is larger than the preset value range, the adjusting screw 9 is screwed inwards; and stopping screwing the adjusting screw 9 until the electrifying response time obtained by the test meets the preset value range. Therefore, the method can be debugged before delivery to form a product. Of course, different preset range values can be specifically formulated according to different requirements of customers, so that products with different parameters can be adjusted, and diversified requirements of the products are met.
The assembling method of the fuel injector further comprises the following steps:
s12, after debugging is completed, glue is dripped into the threaded connection position of the adjusting screw 9 and the valve cover 3. Therefore, the adjusting screw 9 can be prevented from loosening and changing in position when in use, and the use stability of the oil sprayer is guaranteed.
Between step S11 and step S12, the method further includes: the flow opening 10 of the adjusting screw 9 is plugged with a plug. Therefore, the glue is dripped into the flow port 10 to prevent the glue from flowing into the flow port to influence the inside of the oil sprayer.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the scope of the present invention is limited thereby, and it should be understood by those skilled in the art that various other modifications and equivalent arrangements can be made by applying the technical solutions and concepts of the present invention within the scope of the present invention as defined in the appended claims.
Claims (5)
1. The method for assembling the fuel injector is characterized by comprising the following steps of:
s1, forming a wiring component (8): the base (36) and the two connecting terminals (37) are subjected to injection molding to obtain a connecting part (8), wherein the connecting terminals (37) are partially positioned in the inner ring hole (40);
s2, forming a coil component (7): the coil (31) is fixed in the winding groove (32), and two leads (35) of the coil (31) are respectively positioned in the lead groove narrow openings (42) of the two lead grooves (34);
s3, forming a driving assembly: an inner ring hole (40) of the base (36) is sleeved on the annular mounting part (39), and one end, far away from the plug interface (38), of the wiring terminal (37) can be bent into the wiring groove (34) under the abutting effect of the end face of the wiring groove (34); then, the lead (35) and the wiring terminal (37) are bent, placed in the accommodating groove (45) and welded; then, glue is poured into the lead groove (34) and the containing groove (45);
s4, forming a valve core component (5): fixing an armature seat (24) on a clamp, and connecting the end part of the valve core (22) with a clamping groove (26) in an interference fit manner by a press-fitting tool acting on a sunken step surface (29);
s5, assembling the valve core (22) into a valve core installation cavity (27) of the valve body (1), then acting on the end face of the valve core installation cavity (27) by adopting a press-fitting tool, and connecting the throttling block (14) with the installation groove (15) in an interference fit manner;
s6, clamping a first sealing ring (49) in a first annular groove (48) in the valve body (1);
s7, placing the driving assembly in the valve body (1) and sleeving the coil framework (33) in the armature seat (24);
s8, clamping a second sealing ring (51) in a second annular groove (50) in the coil framework (33);
s9, inserting the circular column (4) into the coil framework (33) and fixedly connecting the valve cover (3) with the valve body (1);
s10, a spring (11) is placed in the circular ring column (4), a third sealing ring (53) is clamped in a third annular groove (52) on the adjusting screw (9), and the adjusting screw (9) is in threaded connection with the valve cover (3).
2. The fuel injector assembling method according to claim 1, characterized in that in the step S9, the fixed connection of the valve cover (3) and the valve body (1) is realized by bending and molding the edge of the valve cover (3) to form a flange (55) to be clamped on the limit flange (54) of the valve body (1).
3. A method of assembling a fuel injector as set forth in claim 1, including the further steps of:
s11, debugging: testing the power-on response time of the oil sprayer, and screwing the adjusting screw (9) outwards if the power-on response time obtained by the test is smaller than the preset value range; if the electrifying response time obtained by the test is larger than the preset value range, the adjusting screw (9) is screwed inwards; and stopping screwing the adjusting screw (9) until the electrifying response time obtained by the test meets the preset value range.
4. A method of assembling a fuel injector as set forth in claim 3, characterized by the further steps of:
s12, after debugging is finished, glue is dripped into the threaded connection position of the adjusting screw (9) and the valve cover (3).
5. The fuel injector assembling method according to claim 4, characterized by further comprising, between step S11 and step S12: the flow opening (10) on the adjusting screw (9) is blocked by a plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810184718.9A CN108561251B (en) | 2018-03-07 | 2018-03-07 | Method for assembling oil injector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810184718.9A CN108561251B (en) | 2018-03-07 | 2018-03-07 | Method for assembling oil injector |
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| Publication Number | Publication Date |
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| CN108561251A CN108561251A (en) | 2018-09-21 |
| CN108561251B true CN108561251B (en) | 2020-09-08 |
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| CN201810184718.9A Expired - Fee Related CN108561251B (en) | 2018-03-07 | 2018-03-07 | Method for assembling oil injector |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19712591A1 (en) * | 1997-03-26 | 1998-10-01 | Bosch Gmbh Robert | Fuel injector and method for manufacturing and using a fuel injector |
| DE102004058803A1 (en) * | 2004-12-07 | 2006-06-08 | Robert Bosch Gmbh | Injector |
| DE102005019837A1 (en) * | 2005-04-28 | 2006-11-02 | Robert Bosch Gmbh | Fuel injection valve for e.g. fuel injection systems of internal combustion engines has inlet port and nozzle member, which are produced as deep-drawn components while being fixed to magnetic circuit element |
| US7963464B2 (en) * | 2008-01-23 | 2011-06-21 | Caterpillar Inc. | Fuel injector and method of assembly therefor |
| US8316825B1 (en) * | 2008-08-04 | 2012-11-27 | French Iii Jack M | Adjustable racing injector |
| US20130152886A1 (en) * | 2011-12-14 | 2013-06-20 | Caterpillar, Inc. | Method Of Extending Engine Service Life And Angular Displacement-Limiting Clip For Same |
| 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 |
| CN103334859A (en) * | 2013-07-03 | 2013-10-02 | 上海理工大学 | Oil atomizer and manufacturing method thereof |
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2018
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| CN108561251A (en) | 2018-09-21 |
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