Electromagnetic valve shell assembly

Abstract

The utility model discloses an electromagnetic valve shell assembly which comprises a shell body of a cylindrical structure, a coil unit, a first coil unit and a second coil unit, and an accommodating space is formed on the inner side of the shell body and used for accommodating the coil unit. The end cover is formed above the shell through an insert injection molding process, and the formed end cover is provided with a shielding part, an inner connecting part and an outer connecting part, and the inner connecting part and the outer connecting part are located on the outer side of the shielding part; the shielding part plays a limiting role above the accommodating space; the inner wall of the containing space is coated with the inner connecting part, the outer wall of the shell is coated with the outer connecting part, and the shell has the advantages of being convenient to produce and manufacture and low in cost; the utility model relates to the technical field of electromagnetic valves.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic valve, more exactly relates to a electromagnetic valve housing assembly. BACKGROUND

[0002] The electromagnetic valve is one of the indispensable components of automobile products, and its main function is to realize the on-off function of the pipeline.

[0003] For example, the electromagnetic valve applied in the automobile air spring has a shell, a containing space on the inner side of the shell is used for containing a coil unit, a metal end cover is connected to the upper end of the containing space by riveting, threaded connection or other methods, and the end cover plays a limiting and sealing role above the containing space.

[0004] The existing end cover generally needs to be produced by machining forming process, which has high cost and needs corresponding assembly steps to be assembled on the shell body, and the assembly size requirement of the end cover is also relatively strict. INVENTION CONTENTS

[0005] In view of the deficiencies and defects of the prior art, an optimized production step and a lower cost shell assembly are provided.

[0006] An electromagnetic valve housing assembly comprises:

[0007] A shell body in a cylindrical structure, a containing space is formed on the inner side of the shell, and the containing space is used for containing a coil unit.

[0008] An end cover, the end cover is formed above the shell body by insert injection molding process, and the formed end cover has a shielding part, an inner connecting part outside the shielding part, and an outer connecting part.

[0009] The shielding part plays a limiting role above the containing space.

[0010] The inner connecting part is covered on the inner wall of the containing space, and the outer connecting part is covered on the outer wall of the shell body.

[0011] After adopting the above structure, the electromagnetic valve housing assembly of the utility model has the following advantages compared with the prior art:

[0012] The traditional assembled (riveting, threaded connection) end cover needs to perform an end cover assembly step in production.

[0013] The application adopts the insert injection molding process to directly form the end cover above the shell body, without the need for a later assembly step, and after the shell body production is completed, the end cover can be formed above the shell body by using automatic equipment, thereby optimizing the production step and improving the production efficiency.

[0014] And the traditional end cover is generally a metal structure, the above-mentioned formed end cover is plastic material, and the cost is also relatively low.

[0015] The shielding portion, the inner connecting portion and the outer connecting portion are integrally formed, the inner connecting portion is covered on the inner wall of the accommodating space, the outer connecting portion is covered on the outer wall of the shell, the contact area between them is large, the end cover can be stably connected on the shell, the reliability of the device is improved, and the service life is prolonged.

[0016] As an improvement of the utility model, the shell comprises a first section, a first bending section is formed by inwardly bending the upper end of the first section, a second section is formed by upwardly extending the inner end of the first bending section,

[0017] The inner connecting portion is covered on the inner wall surface of the second section and the bottom wall surface of the first bending section.

[0018] The outer connecting portion is covered on the outer wall surface of the second section.

[0019] As an improvement of the utility model, the upper end of the second section is inwardly bent to form a reverse buckle structure, and the reverse buckle structure is embedded with the inner connecting portion and the outer connecting portion.

[0020] As an improvement of the utility model, the bottom end face of the shielding portion has an annular flange.

[0021] The upper end face of the coil unit is abuttingly arranged with the annular flange to form a sealing structure.

[0022] As an improvement of the utility model, the number of the annular flanges is two, and the annular flanges are arranged at intervals inside and outside.

[0023] As an improvement of the utility model, the shielding portion has a hole body inside, and the hole body is used for the wiring member of the coil unit to pass out. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a sectional view structure schematic diagram of the utility model.

[0025] Figure 2 It is a sectional view structure schematic diagram of the utility model. Figure 1 It is an enlarged schematic diagram of structure A in the utility model.

[0026] Figure 3 It is a sectional view structure schematic diagram of the shell of the utility model.

[0027] Figure 4 It is a sectional view structure schematic diagram of the utility model after assembling the coil unit.

[0028] Figure 5 It is a whole sectional view structure schematic diagram of the utility model after assembling.

[0029] As shown in the figure: 1, the shell; 1.1, the accommodation space; 1.2, the first section; 1.21, the first bending section; 1.3, the second section; 1.31, the reverse buckle structure; 2, the coil unit; 2.1, the coil skeleton; 2.2, the coil; 2.3, the plastic package; 3, the end cover; 3.1, the shielding part; 3.2, the inner connecting part; 3.3, the outer connecting part; 4, the annular flange; 5, the hole body; 6, the valve seat; 6.1, the working port; 6.2, the flow channel; 7, the static core; 8, the moving core; 9, the guide rod; 10, the valve core; 11, the reset assembly. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings and specific embodiments.

[0031] Please refer to Figures 1-5 As shown in the figure, an electromagnetic valve shell assembly comprises:

[0032] The shell 1 is of a cylindrical structure, and the inner side of the shell forms an accommodation space 1.1 for accommodating the coil unit 2;

[0033] The end cover 3 is formed above the shell 1 by insert injection molding process, and the formed end cover 3 has a shielding part 3.1, an inner connecting part 3.2 outside the shielding part 3.1, and an outer connecting part 3.3;

[0034] The shielding part 3.1 serves as a limiting part above the accommodation space 1.1;

[0035] The inner connecting part 3.2 is wrapped around the inner wall of the accommodation space 1.1, and the outer connecting part 3.3 is wrapped around the outer wall of the shell 1.

[0036] The conventional assembled (riveted, threaded) end cover 3 needs an end cover 3 assembling step in production;

[0037] The present application directly forms the end cover 3 above the shell 1 by insert injection molding process, without the need for a later assembling step. After the production of the shell 1 is completed, the end cover 3 can be formed above the shell 1 by using automatic equipment, thereby optimizing the production steps and improving the production efficiency;

[0038] And the conventional end cover 3 is generally of a metal structure, and the above-mentioned formed end cover 3 is of a plastic material, and the cost is relatively low;

[0039] In the present application, the shielding part 3.1, the inner connecting part 3.2, and the outer connecting part 3.3 are integrally formed, wherein the inner connecting part 3.2 is wrapped around the inner wall of the accommodation space 1.1, and the outer connecting part 3.3 is wrapped around the outer wall of the shell 1, so that the contact area therebetween is large, and the end cover 3 can be stably connected to the shell 1, thereby improving the reliability of the device operation and prolonging the service life.

[0040] In the present application, the coil unit 2 comprises a coil skeleton 2.1, and a coil 2.2 wound in the wire slot outside the coil skeleton 2.1, and the coil 2.2 is integrally plasticized 2.3 after winding is completed;

[0041] When assembling, the coil unit 2 is inserted from the bottom of the accommodation space 1.1 upwards until the upper end surface of the coil unit 2 abuts against the bottom wall surface of the shielding part 3.1;

[0042] Further, the lower part of the accommodation space 1.1 can be provided with a limiting part to limit the downward movement of the coil unit 2, and cooperate with the shielding part 3.1 to limit the upward movement of the coil unit 2, so that the coil unit 2 can be stably connected in the accommodation space 1.1.

[0043] Please refer to Figure 1 、 Figure 3 As shown, the shell 1 is a metal shell, which has the characteristics of high structural strength and simple processing;

[0044] The shell 1 comprises a first section 1.2, the upper end of the first section 1.2 is inwardly bent to form a first bent section 1.21, the inner end of the first bent section 1.21 is upwardly extended to form a second section 1.3,

[0045] The inner connecting part 3.2 is wrapped on the inner wall surface of the second section 1.3 and the bottom wall surface of the first bent section 1.21;

[0046] The outer connecting part 3.3 is wrapped on the outer wall surface of the second section 1.3.

[0047] The inner diameter of the second section 1.3 is smaller than the inner diameter of the first section 1.2, and the outer diameter of the second section 1.3 is also smaller than the outer diameter of the first section 1.2, the outer diameter of the outer connecting part 3.3 wrapped by the outer wall of the second section 1.3 is consistent with the outer diameter of the first section 1.2, so that the structural integrity is better, which is beneficial to subsequent assembly;

[0048] The inner connecting part 3.2 is wrapped on the inner wall of the second section 1.3 and the bottom wall surface of the first bent section 1.21 respectively, the lower end of the inner connecting part 3.2 forms an outwardly folded snap structure, the upward tensile strength is further improved, and the stability of the end cover 3 connection is improved.

[0049] Please refer to Figure 1 、 Figure 2 、 Figure 3 As shown, the upper end of the second section 1.3 is inwardly bent to form a reverse buckle structure 1.31, and the reverse buckle structure 1.31 is embedded with the inner connecting part 3.2 and the outer connecting part 3.3.

[0050] The inner side of the upper end of the second section 1.3 is embedded on the outer side of the inner connecting part 3.2, and the outer connecting part 3.3 is wrapped on the outer side of the upper end of the second section 1.3, and the above-mentioned connecting structure further improves the axial tensile strength of the end cover 3, and the connection of the end cover 3 is more stable and reliable.

[0051] The bottom end face of the shielding part 3.1 has an annular flange 4;

[0052] The upper end face of the coil unit 2 is arranged against the annular flange 4 to form a sealing structure.

[0053] The upper end face of the coil unit 2 after the plastic coating 2.3 is completed can be a flat wall structure;

[0054] The traditional electromagnetic valve needs to be provided with a rubber sealing ring between the end cover 3 and the coil unit 2, and in the present application, the annular flange 4 is formed integrally with the end cover 3 when the end cover 3 is formed, and when the coil unit 2 is assembled to the upper end face and arranged against the annular flange 4, the annular flange 4 is crushed to form a sealing structure similar to a sealing ring, without the need for additional sealing rings, reducing the number of parts and reducing costs.

[0055] The number of annular flanges 4 is two, and they are arranged in an inner-outer interval.

[0056] The two annular flanges 4 are arranged in an inner-outer interval, and a sealing structure is formed between the upper end face of the coil unit 2 and each of the two annular flanges 4, and impurities need to pass through the two sealing structures to enter the inside, improving the sealing performance of the device, improving the reliability of the device, and prolonging the service life.

[0057] Please refer to Figure 4 、 Figure 5 As shown, the inner side of the shielding part 3.1 has a hole body 5 for the wire connecting part of the coil unit 2 to pass out.

[0058] The above improvements make the structure layout reasonable, which is beneficial to assembly and miniaturization of the device.

[0059] The structure design of the end cover 3 in the present application also has the effect of shock absorption and noise reduction, which improves the performance of the device;

[0060] The end cover 3 formed by the insert injection molding process can form a working surface with a relatively complex shape but with low size requirements, which can reduce the number of parts for assembly and further reduce costs.

[0061] In the present application, the lower end of the accommodating space 1.1 can be provided with a valve seat 6, the upper end face of the valve seat 6 is provided with a static iron core 7, the static iron core 7 is fixed with the shell 1, and the upper end face of the static iron core 7 is arranged against the bottom end face of the coil unit 2; the valve seat 6 is provided with a working port 6.1 and a flow channel 6.2,

[0062] The coil frame 2.1 is provided with a sliding hole extending upward and downward, and the sliding hole is provided with a moving iron core 8, the moving iron core 8 is provided with a guide rod 9, the guide rod 9 passes through the static iron core 7 and the valve seat 6 and is connected with a valve core 10;

[0063] The valve core 10 is arranged at the upper end of the working port 6.1;

[0064] When the coil 2.2 is electrified, the moving iron core 8 moves downward to cooperate with the static iron core 7, and drives the valve core 10 to close the working port 6.1, so that the medium cannot pass through the working port 6.1 to enter the flow channel 6.2;

[0065] When the coil 2.2 is de-energized, the reset assembly 11 (a spring arranged between the static iron core 7 and the moving iron core 8) drives the valve core 10 to move upward to open the working port 6.1, and drives the moving iron core 8 to move upward, at this time, the working port 6.1 is communicated with the flow channel 6.2, and the medium can pass through.

[0066] The above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical scheme belonging to the idea of the present application is within the protection scope of the present application. It should be pointed out that, for the ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. An electromagnetic valve housing assembly characterized by, include: A cylindrical shell (1) has an accommodating space (1.1) formed on the inner side of the shell, which is used to accommodate the coil unit (2); End cap (3), the end cap (3) is formed on the shell (1) by insert injection molding process, and the formed end cap (3) has a shielding part (3.1), an inner connecting part (3.2) located outside the shielding part (3.1), and an outer connecting part (3.3); The shielding part (3.1) serves as a limiting element above the accommodating space (1.1); The inner connecting part (3.2) covers the inner wall of the accommodating space (1.1), and the outer connecting part (3.3) covers the outer wall of the shell (1).

2. A solenoid valve housing assembly according to claim 1, wherein: The housing (1) includes a first segment (1.2), the upper end of which is bent inward to form a first bent segment (1.21), and the inner end of the first bent segment (1.21) extends upward to form a second segment (1.3). The inner connecting part (3.2) covers the inner wall surface of the second section (1.3) and the bottom wall surface of the first bending section (1.21); The outer connecting part (3.3) covers the outer wall surface of the second section (1.3).

3. A solenoid valve housing assembly according to claim 2, wherein: The upper end of the second segment (1.3) is bent inward to form an inverted structure (1.31), which is fitted with the inner connecting part (3.2) and the outer connecting part (3.3).

4. The solenoid valve housing assembly of claim 1, wherein: The bottom end face of the shielding part (3.1) has an annular flange (4); The upper end face of the coil unit (2) is pressed against the annular flange (4) to form a sealed structure.

5. A solenoid valve housing assembly according to claim 4, wherein: The number of the annular flanges (4) is two, and they are arranged with an inner and outer gap.

6. A solenoid valve housing assembly as defined in claim 1 wherein: The shielding part (3.1) has a hole (5) on its inner side, through which the wiring of the coil unit (2) passes.

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