CN216749564U - Coil framework, coil unit and electronic expansion valve thereof - Google Patents

Abstract

The utility model relates to an expansion valve technical field especially relates to a coil skeleton, coil unit and electronic expansion valve thereof, electronic expansion valve coil skeleton includes skeleton body and contact pin at least, the skeleton body passes through injection moulding, the contact pin is the setting of orthoscopic shape, just the one end of contact pin with the skeleton body is through moulding plastics the connection. The application has the advantages that: the framework body and the contact pins are integrally molded by injection, so that no gap exists between the framework body and the contact pins, and the problem of shaking of the contact pins is effectively solved; through integrative injection moulding, ensured the stability of contact pin installation to the contact pin can set to the orthoscopic, the degree of difficulty of orthoscopic contact pin processing preparation is lower, and installs more easily in the skeleton body, can reduce the thickness on plastic envelope layer, and then reduces the gas pocket of moulding plastics, solves the bad problem of electrical insulation, still is favorable to reducing the processing degree of difficulty and the processing cost of coil skeleton.

Description

Coil framework, coil unit and electronic expansion valve thereof

Technical Field

The utility model relates to an expansion valve technical field especially relates to a coil skeleton, coil unit and electronic expansion valve thereof.

Background

A gap exists between a contact pin and a framework body in the existing expansion valve coil framework, so that the contact pin is easy to shake and even fall off, the expansion valve coil is further influenced to be broken, and the service life of the expansion valve coil is shortened.

In addition, the contact pin usually has the portion of bending at present, realizes the spacing installation of contact pin through the portion of bending and the cooperation of skeleton body, and the installation of so contact pin is fixed more complicatedly, and because bending when the contact pin preparation, the preparation step is comparatively complicated with the preparation technology corresponds.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a coil bobbin, a coil unit and an electronic expansion valve thereof.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

in one embodiment, the electronic expansion valve coil framework at least comprises a framework body and a contact pin, wherein the framework body is formed by injection molding, the contact pin is arranged in a linear shape, and one end of the contact pin is connected with the framework body by injection molding.

The framework body and the contact pins are formed by integral injection molding, so that no gap exists between the framework body and the contact pins, and the problem of shaking of the contact pins is effectively solved; through integrative injection moulding, ensured the stability of contact pin installation to the contact pin can set to the orthoscopic, the degree of difficulty of orthoscopic contact pin processing preparation is lower, and installs more easily in the skeleton body, can reduce the thickness on plastic envelope layer, and then reduces the gas pocket of moulding plastics, solves the bad problem of electrical insulation, still is favorable to reducing the processing degree of difficulty and the processing cost of coil skeleton.

In one embodiment, the pin is provided with an anti-falling structure, and after the pin is connected with the framework body in an injection molding manner, the anti-falling structure is located in the framework body and forms anti-falling fit with the framework body.

It can be understood that anti-disengaging structure increases the area of contact and increases the friction between contact pin and the skeleton body to form the anticreep cooperation with the skeleton body, so can form backstop spacing in order to prevent that the contact pin from droing.

In one embodiment, the anti-falling structure comprises a convex part arranged on the outer side wall of the pin, and a shaft shoulder is formed between the convex part and the pin.

It can be understood that the shaft shoulder is favorable to increasing the area of contact pin and skeleton body, and if the contact pin takes place for the removal of skeleton body, then the shaft shoulder then has the resistance that has increased the contact pin and removed to prevent that the contact pin from removing for the skeleton body, and then ensure the stable setting of contact pin in the skeleton body.

In one embodiment, the protrusion is integrally or separately formed with the pin.

It can be understood that, during processing, the convex part and the contact pin are integrally formed, the processing is simpler and quicker, the processing steps are more simplified, and the connection strength between the convex part and the contact pin is higher, so that the stability is higher.

In one embodiment, the protrusion is annular.

In one embodiment, the protrusions are formed by extrusion.

In one embodiment, the anti-separation structure comprises a groove arranged on the outer side wall of the pin.

It can be understood that, in the agent of moulding plastics flowed into the recess during moulding plastics, form the backstop cooperation with the recess behind the injection moulding, be favorable to preventing that the contact pin from droing to set up the area of contact that the recess has increased anti-disengaging structure and skeleton body, thereby be favorable to strengthening the joint strength of contact pin and skeleton body, the anticreep effect is better.

In one embodiment, the groove extends circumferentially along the pin.

It can be understood that the recess extends along contact pin circumference to make the injection molding agent evenly flow into contact pin week side, the part that lies in the skeleton body in the recess behind the injection molding is spacing to contact pin week side formation, is favorable to having strengthened the intensity that contact pin and skeleton body were moulded plastics and are connected and form backstop complex intensity.

The application also provides the following technical scheme:

a coil unit of an electronic expansion valve comprises a coil and the coil framework, wherein the coil is wound on the coil framework.

The application also provides the following technical scheme:

an electronic expansion valve comprising a coil unit as described above.

The utility model provides a pair of coil skeleton, coil unit and electronic expansion valve thereof compares as follows in prior art's beneficial effect:

the utility model provides a coil framework, its skeleton body and contact pin form through integrative injection moulding, so there is no clearance between skeleton body and the contact pin, effectively solve the difficult problem that the contact pin rocked; through integrative injection moulding, ensured the stability of contact pin installation to the contact pin can set to the orthoscopic, the degree of difficulty of orthoscopic contact pin processing preparation is lower, and installs more easily in the skeleton body, can reduce the thickness on plastic envelope layer, and then reduces the gas pocket of moulding plastics, solves the bad problem of electrical insulation, still is favorable to reducing the processing degree of difficulty and the processing cost of coil skeleton.

Drawings

Fig. 1 is a sectional view of a coil unit provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a coil bobbin according to an embodiment of the present invention;

FIG. 3 is a front view of the bobbin of FIG. 2;

FIG. 4 is a top view of the bobbin of FIG. 3;

fig. 5 is a schematic structural diagram of a pin according to an embodiment of the present invention;

FIG. 6 is a side view of the pin of FIG. 5;

fig. 7 is a schematic structural diagram of a pin according to another embodiment of the present invention;

fig. 8 is a side view of the pin of fig. 7;

fig. 9 is a schematic structural diagram of a pin according to another embodiment of the present invention;

fig. 10 is a side view of the pin of fig. 9.

Reference numerals are as follows: 100. a coil unit; 10. a coil bobbin; 11. a skeleton body; 12. inserting a pin; 13. an anti-falling structure; 131. a convex portion; 132. a shaft shoulder; 133. a groove; 20. and a coil.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The coil frame 10 is an important part of the stator of the electronic expansion valve, in an embodiment of the present application, referring to fig. 2 to 4, the coil frame 10 of the electronic expansion valve at least includes a frame body 11 and pins 12, the frame body 11 is formed by injection molding, the pins 12 are arranged in a linear shape, and one end of the pins 12 is connected to the frame body 11 by injection molding.

It can be understood that the framework body 11 and the contact pin 12 are formed by integral injection molding, so that no gap exists between the framework body 11 and the contact pin 12, and the problem of shaking of the contact pin 12 is effectively solved; through integral injection molding, the installation stability of the contact pin 12 is ensured, a prerequisite condition is provided for the contact pin 12 to be in a linear shape, the contact pin 12 in the linear shape can be stably injected into the framework body 11, and the contact pin 12 is prevented from shaking and falling off; in addition, the linear contact pin 12 is less difficult to process and manufacture, and is easier to install in the framework body 11, so that the thickness of a plastic package layer can be reduced, injection molding air holes are reduced, the problem of poor electrical insulation is solved, and the processing difficulty and the processing cost of the coil framework 10 are reduced.

Referring to fig. 5-10, the anti-separation structure 13 is disposed on the pin 12, after the pin 12 is connected to the frame body 11 by injection molding, the anti-separation structure 13 is located in the frame body 11 and forms an anti-separation fit with the frame body 11, so as to increase the contact area between the pin 12 and the frame body 11 and increase friction, and thus a stop can be formed to prevent the pin 12 from falling off.

As shown in fig. 5-10, the retaining structure 13 includes a protrusion 131 disposed on the outer side wall of the pin 12, and a shoulder 132 is formed between the protrusion 131 and the pin 12. Shoulder 132 is favorable to increasing the area of contact pin 12 with skeleton body 11, and if the removal of contact pin 12 emergence for skeleton body 11, then shoulder 132 then has the resistance that has increased contact pin 12 and remove to prevent that contact pin 12 from removing for skeleton body 11, and then ensure the stable setting of contact pin 12 in skeleton body 11.

With reference to fig. 5-10, the protrusion 131 and the pin 12 are integrated, and when processing, the protrusion 131 and the pin 12 are integrally formed, so that the processing is simpler and faster, the processing steps are more simplified, and the connection strength between the protrusion 131 and the pin 12 is higher, so that the connection is more stable; of course, in other embodiments, the protrusion 131 and the pin 12 may be separately provided and then assembled into a single body.

In one embodiment, the protrusion 131 is formed by extrusion. After the pin 12 is manufactured and molded, the convex portion 131 protruding from the pin 12 is formed by extrusion at the position of the convex portion 131. Of course, in other embodiments, the manner of forming the convex portion 131 is not limited to the above, for example, the convex portion 131 may be formed by a mold process or integrally formed with the pin 12 by a mold process.

In one embodiment, referring to fig. 5 and 6, protrusion 131 is annular. The diameter of the annular convex part 131 is larger than that of the pin 12, after the pin 12 and the framework body 11 are integrally injection molded, the framework body 11 stops the convex part 131 along the length direction of the pin 12, and the convex part 131 is matched with the framework body 11 to limit the pin 12 to be loosened along the length direction of the pin 12.

Of course, in other embodiments, the shape of the convex portion 131 is not limited to the above. For example, in another embodiment, as shown in fig. 7 and 8, the convex portion 131 has a rectangular parallelepiped shape. Alternatively, as shown in fig. 9 and 10, the convex portion 131 has a triangular plate shape, but the convex portion 131 may have another irregular shape.

Referring to fig. 7 and 8, the retaining structure 13 includes a groove 133 formed on the outer sidewall of the pin 12. In injection molding agent flowed into recess 133, formed backstop cooperation with recess 133 after injection molding, be favorable to preventing that contact pin 12 from droing to set up recess 133 and increased anti-disengaging structure 13 and skeleton body 11's area of contact, thereby be favorable to strengthening contact pin 12 and skeleton body 11's joint strength, the anticreep effect is better.

With continued reference to fig. 7 and 8, the groove 133 extends along the circumference of the pin 12 to allow the molding compound to uniformly flow around the pin 12, so that the strength of the injection molding connection between the pin 12 and the frame body 11 and the strength of the stop fit are significantly enhanced after the injection molding. In other embodiments, the recess 133 may also be open along the axial extension of the pin 12.

In summary, the coil framework 10 provided by the present application is formed by integrally injection molding the framework body 11 and the pins 12, so that there is no gap between the framework body 11 and the pins 12, and the problem of shaking of the pins 12 is effectively solved; through integrative injection moulding, the stability of installation of contact pin 12 has been ensured to contact pin 12 can set to the linear shape, and the degree of difficulty of linear shape contact pin 12 processing preparation is lower, and installs in skeleton body 11 more easily, can reduce the thickness of plastic envelope layer, and then reduces the gas pocket of moulding plastics, solves the bad problem of electrical insulation, still is favorable to reducing the processing degree of difficulty and the processing cost of coil skeleton 10.

Referring to fig. 1, in an embodiment, the coil unit 100 includes a coil 20 and a coil bobbin 10 as described in the above embodiment, the coil 20 is wound on the coil bobbin 10 to form the coil unit 100, and since the pins 12 in the coil bobbin 10 provided by the present application are stably mounted and are not easy to fall off, the coil 20 is not easy to break, which is beneficial to improving the quality and the service life of the coil unit 100.

The application also provides an electronic expansion valve which is mainly used for throttling and reducing pressure and adjusting the flow of the passage. The electronic expansion valve includes the coil unit 100 as described above to improve the performance of the electronic expansion valve.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms do not have special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The features of the above embodiments may be combined arbitrarily, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. The utility model provides an electronic expansion valve coil skeleton, its characterized in that, electronic expansion valve coil skeleton includes skeleton body (11) and contact pin (12) at least, skeleton body (11) are through injection moulding, contact pin (12) are the setting of orthoscopic shape, just the one end of contact pin (12) with skeleton body (11) are through moulding plastics the connection.

2. The electronic expansion valve coil framework as claimed in claim 1, wherein the pin (12) is provided with an anti-falling structure (13), and after the pin (12) is connected with the framework body (11) in an injection molding manner, the anti-falling structure (13) is located in the framework body (11) and forms an anti-falling fit with the framework body (11).

3. The electronic expansion valve coil bobbin of claim 2, wherein the retaining structure (13) comprises a protrusion (131) disposed on an outer side wall of the insertion pin (12), and a shoulder (132) is formed between the protrusion (131) and the insertion pin (12).

4. An electronic expansion valve coil armature according to claim 3, wherein the protrusions (131) are provided in one piece or in separate pieces with the pins (12).

5. The electronic expansion valve bobbin of claim 3, wherein the protrusion (131) is annular.

6. An electronic expansion valve coil armature according to claim 3, wherein the protrusions (131) are formed by extrusion.

7. An electronic expansion valve coil bobbin as claimed in claim 2, wherein the retaining structure (13) comprises a groove (133) opening onto the outer side wall of the insertion pin (12).

8. An electronic expansion valve coil armature according to claim 7, wherein the groove (133) extends circumferentially along the pin (12).

9. An electronic expansion valve coil unit, comprising a coil (20) and a bobbin according to any of claims 1-8, the coil (20) being wound around the bobbin.

10. An electronic expansion valve comprising a coil unit according to claim 9.

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