CN215979664U - Oil injector electromagnetic assembly for high-pressure common rail oil injection system - Google Patents
Oil injector electromagnetic assembly for high-pressure common rail oil injection system Download PDFInfo
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- CN215979664U CN215979664U CN202121959036.4U CN202121959036U CN215979664U CN 215979664 U CN215979664 U CN 215979664U CN 202121959036 U CN202121959036 U CN 202121959036U CN 215979664 U CN215979664 U CN 215979664U
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Abstract
The utility model discloses a fuel injector electromagnet assembly for a high-pressure common rail fuel injection system, which comprises a magnetic head core shaft, a magnetic head pressing block, a magnetic core, an armature shaft and a spring, wherein the magnetic head core shaft is arranged on the magnetic head pressing block; the magnetic head core shaft and the magnetic head pressing block adopt a split structure; the magnetic head core shaft comprises an oil return section positioned at the upper part, a magnetic head pressing block connecting section positioned in the middle and a magnetic core mounting section positioned at the lower part; an annular welding groove is formed at the joint of the oil return section and the magnetic head pressing block; an oil inlet hole is formed in the magnetic core mounting section close to the magnetic head pressing block connecting section; an armature shaft and a spring are arranged in the magnetic head core shaft; the magnetic head core shaft is inserted into a central hole of the magnetic head pressing block, and the magnetic head pressing block connecting section is fixedly connected with the inner end face of the central hole of the magnetic head pressing block in the annular welding groove in a welding mode; and an annular oil inlet groove is formed in the position, corresponding to the oil inlet hole, of the lower surface of the magnetic head pressing block. The utility model greatly reduces the processing difficulty of the electromagnetic component of the oil injector, improves the production efficiency and reduces the product cost.
Description
Technical Field
The utility model belongs to an oil injection system of an internal combustion engine, and particularly relates to an oil injector electromagnet assembly for a high-pressure common rail oil injection system.
Background
The magnetic head core 1 and the magnetic head pressing block 2 of the existing oil sprayer electromagnetic assembly are of an integral structure, please refer to fig. 4, the center hole of the magnetic head pressing block is in guiding fit with the armature shaft, and the wear resistance is required to be good; the lower end face of the magnetic head is welded to the magnetic core, and good weldability is required. The wear resistance is good, and the carbon content and the hardness of the material are high; good weldability requires low carbon content in the material. In order to meet the two requirements at the same time, the prior art is to perform carburizing and quenching on a low-carbon material and then grind off a carburized layer on the end face. In addition, the part of the armature shaft with smaller diameter at the lower section of the magnetic head structure in the prior art extends out of the end face to be longer, and the turning and cutting amount of the whole material is very large. Similarly, the upper-section oil return hole part of the magnetic head in the prior art is also longer, and the amount of the cutting materials is larger. Thirdly, when the magnetic head grinds the center hole and the small end face A in the prior art, if the clamping position is arranged at the position of an O-shaped ring groove B on the excircle of the magnetic head, the telescopic length of the chuck is very large, and the clamping precision is difficult to ensure; if the clamp is arranged at the excircle C connected with the tightening cap, the clamping precision is poor due to the machining precision of the excircle and the thermal treatment deformation. By combining the three points, the magnetic head in the prior art has higher processing cost and higher processing difficulty.
Therefore, the utility model provides the injector electromagnetic assembly for the high-pressure common rail injection system, which greatly reduces the processing difficulty of the injector electromagnetic assembly, improves the production efficiency, reduces the product cost and is convenient to cope with intense market competition.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides the oil injector electromagnetic component for the high-pressure common rail oil injection system, which greatly reduces the processing difficulty of the oil injector electromagnetic component, improves the production efficiency, reduces the product cost and is convenient to meet the intense market competition.
The utility model is realized in this way, a fuel injector electromagnet assembly for a high-pressure common rail fuel injection system comprises a magnetic head core shaft, a magnetic head pressing block, a magnetic core, an armature shaft and a spring; the magnetic head core shaft and the magnetic head pressing block are of split structures; the magnetic head core shaft is made of high-carbon steel, and the magnetic head pressing block is made of low-carbon steel;
the magnetic head core shaft comprises an oil return section positioned at the upper part, a magnetic head pressing block connecting section positioned in the middle and a magnetic core mounting section positioned at the lower part; an annular welding groove is formed at the joint of the oil return section and the magnetic head pressing block; the magnetic head pressing block connecting section and the magnetic core mounting section adopt a reducing structure, and the outer diameter of the magnetic core mounting section is smaller than that of the magnetic head pressing block connecting section; an oil inlet hole is formed in the magnetic core mounting section close to the magnetic head pressing block connecting section; an oil return hole, an oil passing hole and an armature shaft mounting hole which are communicated are arranged in the magnetic head core shaft from top to bottom at one time, and a spring is arranged between the armature shaft and the bottom surface of the oil passing hole; the magnetic head core shaft is inserted into a central hole of the magnetic head pressing block, and the magnetic head pressing block connecting section is fixedly connected with the inner end face of the central hole of the magnetic head pressing block in the annular welding groove in a welding mode;
the lower surface of the magnetic head pressing block is provided with an annular oil inlet groove corresponding to the position of the oil inlet hole, and the oil inlet hole is positioned in the annular oil inlet groove.
Preferably; the method comprises the following steps: the oil inlet is perpendicular to the axial direction of the magnetic head core shaft.
Preferably; the magnetic head pressing block connecting section is in interference fit with a center hole of the magnetic head pressing block, and the interference magnitude of the magnetic head pressing block connecting section is 0.002-0.008 mm.
Compared with the existing magnetic head core shaft and magnetic head pressing block integrated structure, the electromagnetic assembly has the advantages that the processing difficulty of the electromagnetic assembly of the oil sprayer is greatly reduced, the production efficiency is improved, and the product cost is reduced; in addition, the magnetic head core shaft is made of high-carbon steel material with higher wear resistance, and the magnetic head pressing block is made of low-carbon steel with better welding performance; the characteristics of the composite material are exerted during actual use, production and use, so that the production requirement and the use requirement are met, compared with the prior art, the composite material is kept consistent from the original use performance, and the service life is even superior to that of the prior art.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a magnetic head spindle structure;
FIG. 3 is a schematic view of a head compact structure;
fig. 4 is a schematic diagram of a prior art structure.
FIG. 1, a magnetic head spindle; 1-1, an oil return section; 1-2, a magnetic head pressing block connecting section; 1-3, a magnetic core mounting section; 1-4, an annular welding groove; 1-5, oil inlet holes; 1-6, oil return hole; 1-7 parts of oil passing holes; 1-8, armature shaft mounting holes; 2. a magnetic head briquetting; 2-1, an annular oil inlet groove; 3. a magnetic core; 4. an armature shaft; 5. a spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 to 3, an injector electromagnet assembly for a high pressure common rail injection system includes a magnetic head core shaft 1, a magnetic head pressing block 2, a magnetic core 3, an armature shaft 4 and a spring 5; the magnetic head core shaft and the magnetic head pressing block adopt a split structure; the magnetic head core shaft is made of high-carbon steel materials, such as bearing steel, die steel and the like, and the magnetic head core shaft 1 is processed and formed on a core walking machine by a bar material which is a raw material in the first step; the second part is subjected to quenching treatment; and the third part is grinding processing, namely, processing a large excircle by using a through type centerless grinder, and grinding a small end face D and an armature shaft mounting hole 1-8 by clamping the large excircle. The magnetic head pressing block is made of low-carbon steel; for example, 20CrMo is firstly subjected to thermal refining and then is processed and formed once again, and the middle hole is ensured to be coaxial with the outer circle and vertical to the lower end face. The magnetic head core shaft 1 and the magnetic head pressing block 2 are made of two different materials, namely the abrasive resistance of the magnetic head pressing block is lower than that of the magnetic head core shaft, but the welding performance is better than that of the magnetic head core shaft; therefore, the welding requirement is ensured, and the service life of the easily damaged magnetic head mandrel is also ensured.
The magnetic head core shaft 1 comprises an oil return section 1-1 positioned at the upper part, a magnetic head pressure block connecting section 1-2 positioned in the middle and a magnetic core mounting section 1-3 positioned at the lower part; an annular welding groove 1-4 is arranged at the joint of the oil return section and the magnetic head pressing block; the magnetic head pressing block connecting section and the magnetic core mounting section adopt a reducing structure, and the outer diameter of the magnetic core mounting section is smaller than that of the magnetic head pressing block connecting section; an oil inlet hole 1-5 is arranged on the magnetic core mounting section near the magnetic head pressing block connecting section; the magnetic head core shaft is internally provided with through oil return holes 1-6, oil passing holes 1-7 and armature shaft mounting holes 1-8 from top to bottom at one time, and a spring 5 is arranged between the armature shaft and the bottom surface of the oil passing hole; the magnetic head core shaft is inserted into a central hole of the magnetic head pressing block, and the magnetic head pressing block connecting section is fixedly connected with the inner end face of the central hole of the magnetic head pressing block in the annular welding groove in a welding mode; the lower surface of the magnetic head pressing block 2 is provided with an annular oil inlet groove 2-1 corresponding to the position of the oil inlet hole, the oil inlet hole is positioned in the annular oil inlet groove, other structures of the magnetic head pressing block are the same as those of the prior art, and the lower end surface of the magnetic head pressing block is matched and welded with the magnetic core.
Preferably; the oil inlet is perpendicular to the axial direction of the magnetic head core shaft.
Preferably; the magnetic head pressing block connecting section is in interference fit with a center hole of the magnetic head pressing block, and the interference magnitude of the magnetic head pressing block connecting section is 0.002-0.008 mm.
Compared with the existing integrated structure of the magnetic head core shaft and the magnetic head pressing block, the electromagnetic assembly of the oil sprayer has the advantages that the processing difficulty is greatly reduced, the production efficiency is improved, and the product cost is reduced; in addition, the magnetic head core shaft is made of high-carbon steel material with higher wear resistance, and the magnetic head pressing block is made of low-carbon steel with better welding performance; the characteristics of the composite material are exerted during actual use, production and use, so that the production requirement and the use requirement are met, compared with the prior art, the composite material is kept consistent from the original use performance, and the service life is even superior to that of the prior art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. An oil injector electromagnet assembly for a high-pressure common rail oil injection system comprises a magnetic head core shaft, a magnetic head pressing block, a magnetic core, an armature shaft and a spring; the magnetic head core shaft and the magnetic head pressing block are of split structures; the magnetic head core shaft is made of high-carbon steel, and the magnetic head pressing block is made of low-carbon steel;
the magnetic head core shaft comprises an oil return section positioned at the upper part, a magnetic head pressing block connecting section positioned in the middle and a magnetic core mounting section positioned at the lower part; an annular welding groove is formed at the joint of the oil return section and the magnetic head pressing block; the magnetic head pressing block connecting section and the magnetic core mounting section adopt a reducing structure, and the outer diameter of the magnetic core mounting section is smaller than that of the magnetic head pressing block connecting section; an oil inlet hole is formed in the magnetic core mounting section close to the magnetic head pressing block connecting section; an oil return hole, an oil passing hole and an armature shaft mounting hole which are communicated are arranged in the magnetic head core shaft from top to bottom at one time, and a spring is arranged between the armature shaft and the bottom surface of the oil passing hole; the magnetic head core shaft is inserted into a central hole of the magnetic head pressing block, and the magnetic head pressing block connecting section is fixedly connected with the inner end face of the central hole of the magnetic head pressing block in the annular welding groove in a welding mode;
the lower surface of the magnetic head pressing block is provided with an annular oil inlet groove corresponding to the position of the oil inlet hole, and the oil inlet hole is positioned in the annular oil inlet groove.
2. The injector electromagnet assembly for a high pressure common rail fuel injection system according to claim 1, characterized in that: the oil inlet is perpendicular to the axial direction of the magnetic head core shaft.
3. The injector electromagnet assembly for a high pressure common rail fuel injection system according to claim 1, characterized in that: the magnetic head pressing block connecting section is in interference fit with a center hole of the magnetic head pressing block, and the interference magnitude of the magnetic head pressing block connecting section is 0.002-0.008 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121959036.4U CN215979664U (en) | 2021-08-19 | 2021-08-19 | Oil injector electromagnetic assembly for high-pressure common rail oil injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121959036.4U CN215979664U (en) | 2021-08-19 | 2021-08-19 | Oil injector electromagnetic assembly for high-pressure common rail oil injection system |
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| CN215979664U true CN215979664U (en) | 2022-03-08 |
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| CN202121959036.4U Active CN215979664U (en) | 2021-08-19 | 2021-08-19 | Oil injector electromagnetic assembly for high-pressure common rail oil injection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915038A (en) * | 2021-08-19 | 2022-01-11 | 北油电控燃油喷射系统(天津)有限公司 | Oil injector electromagnetic assembly for high-pressure common rail oil injection system |
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2021
- 2021-08-19 CN CN202121959036.4U patent/CN215979664U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915038A (en) * | 2021-08-19 | 2022-01-11 | 北油电控燃油喷射系统(天津)有限公司 | Oil injector electromagnetic assembly for high-pressure common rail oil injection system |
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