Coil component and electronic expansion valve with same

Abstract

The utility model provides a coil component and an electronic expansion valve with the coil component. The coil component comprises a coil body and a coil core, the wire assembly comprises a wire and a sheath, the wire is directly or indirectly electrically connected with the coil body, and the sheath sleeves the outer side of the wire; and the wire protection structure is arranged on the wire assembly in a sleeving mode, the wire protection structure is arranged close to the coil body, the wire protection structure is provided with an extrusion part, the extrusion part is arranged on the outer side of the sheath in a sleeving mode, and the extrusion part can extrude the wire and the sheath so as to limit the relative position of the wire and the sheath. Through the technical scheme provided by the invention, the problem that a gap is very easy to generate between the sheath and the wire in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic expansion valve technical field, specifically, relate to a coil component and electronic expansion valve with it. BACKGROUND

[0002] In the related art, the lead assembly and the coil body can be formed into a coil component by one-shot injection molding, and the pins of the lead assembly and the coil body are electrically connected during the injection molding process; the lead assembly is partially encapsulated by the plastic encapsulation material, and the lead assembly is injected into the coil component. The lead assembly includes leads and a sheath, the leads are arranged in the sheath, and the sheath is tightly attached to the outer surface of the leads but is not fixed to the leads. Therefore, when the lead assembly is extruded by an external force, the lead assembly is prone to deformation, which causes a gap between the sheath and the leads.

[0003] In the related art, when the one-shot injection molding process is used, the lead assembly is affected by the injection molding pressure, and a gap is easily generated between the sheath and the leads. During the one-shot injection molding process of the lead assembly and the coil body, the gas inside the mold cavity can enter the gap between the sheath and the leads, which can cause the gap to become larger and larger. Affected by the injection molding pressure, the plastic encapsulation material can flow to the gap between the sheath and the leads. The plastic encapsulation material can flow along the gap, and finally, under the influence of the injection molding pressure and the injection molding temperature, the plastic encapsulation material melts the sheath and the leads, causing the plastic encapsulation material to flow to the outside of the sheath, which results in poor coil insulation. SUMMARY

[0004] The utility model provides a kind of coil component and electronic expansion valve with it to solve the problem that the gap between sheath and lead is extremely easy to generate in prior art.

[0005] According to one aspect of the utility model, a coil component is provided, which includes: a coil body; a lead assembly including leads and a sheath, the leads being directly or indirectly electrically connected to the coil body, and the sheath being arranged on the outside of the leads; and a lead protection structure arranged on the lead assembly and located close to the coil body, the lead protection structure having a pressing portion arranged on the outside of the sheath, and the pressing portion being capable of pressing the leads and the sheath to limit the relative position of the leads and the sheath.

[0006] Further, the lead protection structure has a first accommodating cavity, the pressing portion is located in the first accommodating cavity, the lead assembly is arranged in the first accommodating cavity, at least part of the leads and the sheath are located in the pressing portion, the first accommodating cavity has a thickness direction and a width direction arranged oppositely, the size of the first accommodating cavity along the thickness direction is smaller than the size of the lead assembly along the thickness direction at the pressing portion, and / or the size of the first accommodating cavity along the width direction is smaller than the size of the lead assembly along the width direction.

[0007] Further, the first accommodating cavity has a size b2 in the thickness direction which is smaller than a size b1 of the wire assembly in the thickness direction, and 0 < b1-b2 < 0.4 mm; the first accommodating cavity has a size a2 in the width direction which is larger than a size a1 of the wire assembly in the width direction, and a2-a1 > 1 mm.

[0008] Further, the first accommodating cavity is in interference fit with the wire assembly in the thickness direction, and / or the first accommodating cavity is in interference fit with the wire assembly in the width direction.

[0009] Further, the coil component further comprises: an encapsulation layer, the encapsulation layer encapsulating at least the coil body and the electrical connection of the wire assembly, and the encapsulation layer encapsulating at least part of the wire assembly, and the extrusion part being located in the encapsulation layer.

[0010] Further, the wire protection structure has a second accommodating cavity, the second accommodating cavity being located closer to the coil body than the first accommodating cavity, and a limiting protrusion being arranged on a side wall of the second accommodating cavity, the limiting protrusion being in abutment with an end of a sheath on the wire assembly and an electrical connection end of the coil body, so as to limit the position of the wire assembly.

[0011] Further, the second accommodating cavity has a size in the thickness direction which is smaller than a size of the first accommodating cavity in the thickness direction, and a size in the width direction which is greater than or equal to a size of the first accommodating cavity in the width direction; or the second accommodating cavity has a size in the thickness direction which is greater than or equal to a size of the first accommodating cavity in the thickness direction, and a size in the width direction which is smaller than a size of the first accommodating cavity in the width direction.

[0012] Further, the second accommodating cavity has a size b3 in the thickness direction which is greater than or equal to a wire diameter D1 and smaller than a size b2 of the first accommodating cavity in the thickness direction, and D1 ≤ b3 < b2; and a size a3 in the width direction which is greater than or equal to a size a2 of the first accommodating cavity in the width direction, and a2 ≤ a3.

[0013] Further, the wire protection structure further comprises a connecting part, the connecting part being fixedly connected with the coil body, so as to limit the relative position of the wire assembly and the coil body.

[0014] Further, the connecting part is in clamping fit with the coil body.

[0015] Further, the wire assembly comprises a plurality of wires, and the sheath is arranged outside the plurality of wires; the connecting part has a plurality of independently arranged separation cavities, the plurality of separation cavities being arranged in one-to-one correspondence with the plurality of wires, and the wires being located in the corresponding separation cavities.

[0016] According to another aspect of the present application, an electronic expansion valve is provided, the electronic expansion valve comprising the coil component provided above.

[0017] The technical scheme of the utility model is applied, the wire and the coil body are electrically connected, the sheath is sleeved outside the wire, the extrusion part of the wire protection structure is sleeved outside the sheath, the extrusion part can extrude the wire and the sheath, thereby the relative position of the wire and the sheath can be limited, further, the wire assembly can be prevented from being extruded by external force or a gap between the sheath and the wire being caused by injection pressure when injection molding, further, the plastic sealing material can be prevented from flowing to the downstream of the extrusion position of the extrusion part through the gap between the sheath and the wire, the sheath and the wire are prevented from being melted by the plastic sealing material, the insulation performance of the coil part is ensured, and the risk of electrical failure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the present application, and together with the description of the present application, serve to explain the present application. In the drawings:

[0019] Figure 1 A structure schematic view of the wire assembly with different sizes in the thickness direction and the width direction is shown;

[0020] Figure 2 A structure schematic view of the wire assembly with same sizes in the thickness direction and the width direction is shown;

[0021] Figure 3 A structure schematic view of the wire protection structure provided by the embodiment one of the utility model is shown;

[0022] Figure 4 A structure schematic view of the wire protection structure provided by the embodiment one of the utility model is shown; Figure 3 A sectional view in A-A direction is shown;

[0023] Figure 5 A top view of the wire protection structure provided by the embodiment one of the utility model is shown;

[0024] Figure 6 A structure schematic view of the wire protection structure and the wire assembly cooperating provided by the embodiment one of the utility model is shown;

[0025] Figure 7 A sectional view of the wire protection structure and the wire assembly cooperating provided by the embodiment one of the utility model is shown;

[0026] Figure 8 A structure schematic view of the coil body, the wire protection structure and the wire assembly cooperating provided by the embodiment one of the utility model is shown;

[0027] Figure 9 A sectional view of the coil body, the wire protection structure and the wire assembly cooperating provided by the embodiment one of the utility model is shown;

[0028] Figure 10 A structure schematic view of the coil component is shown in the embodiment one of the utility model;

[0029] Figure 11 A sectional view of the coil component is shown in the embodiment one of the utility model;

[0030] Figure 12 A structure schematic view of the wire protection structure is shown in the embodiment two of the utility model;

[0031] Figure 13 A structure schematic view of the wire protection structure is shown in the embodiment two of the utility model; Figure 12 A sectional view in B-B direction;

[0032] Figure 14 A bottom view of the wire protection structure is shown in the embodiment two of the utility model;

[0033] Figure 15 A structure schematic view of the wire protection structure and the wire assembly cooperation is shown in the embodiment two of the utility model;

[0034] Figure 16 A sectional view of the wire protection structure and the wire assembly cooperation is shown in the embodiment two of the utility model;

[0035] Figure 17 A structure schematic view of the coil body, wire protection structure and wire assembly cooperation is shown in the embodiment two of the utility model;

[0036] Figure 18 A sectional view of the coil body, wire protection structure and wire assembly cooperation is shown in the embodiment two of the utility model;

[0037] Figure 19 A front view of the wire protection structure is shown in the embodiment three of the utility model;

[0038] Figure 20 A structure schematic view of the wire protection structure is shown in the embodiment three of the utility model; Figure 19 A sectional view in C-C direction;

[0039] Figure 21 A structure schematic view of the wire protection structure is shown in the embodiment three of the utility model;

[0040] Figure 22 A structure schematic view of the coil body, wire protection structure and wire assembly cooperation is shown in the embodiment three of the utility model;

[0041] Figure 23 A sectional view of the coil body, wire protection structure and wire assembly cooperation is shown in the embodiment three of the utility model;

[0042] Figure 24A schematic diagram of the coil component provided in Embodiment 3 of this utility model is shown;

[0043] Figure 25 A cross-sectional view of the coil component provided in Embodiment 3 of this utility model is shown.

[0044] The above figures include the following reference numerals:

[0045] 10. Coil body;

[0046] 20. Wire assembly;

[0047] 21. Conductor; 22. Sheath;

[0048] 30. Cable protection structure;

[0049] 301, First end; 302, Second end;

[0050] 31. First receiving cavity;

[0051] 32. Second receiving cavity; 321. Limiting protrusion;

[0052] 33. Connecting part; 331. Separating cavity;

[0053] 40. Encapsulation layer. Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0055] like Figures 1 to 11 As shown, Embodiment 1 of this utility model provides a coil component, which includes a coil body 10, a conductor assembly 20, and a sheath structure 30. The conductor assembly 20 includes a conductor 21 and a sheath 22. The conductor 21 is directly or indirectly electrically connected to the coil body 10, and the sheath 22 is sleeved on the outside of the conductor 21. The sheath structure 30 is sleeved on the conductor assembly 20 and is disposed close to the coil body 10. The sheath structure 30 has a pressing part, which is sleeved on the outside of the sheath 22. The pressing part can press the conductor 21 and the sheath 22 to limit their relative positions.

[0056] The technical scheme of the application is applied, the lead wire 21 is electrically connected with the coil body 10, the sheath 22 is sleeved outside the lead wire 21, the extrusion part of the wire sheath structure 30 is sleeved outside the sheath 22, the extrusion part can extrude the lead wire 21 and the sheath 22, so that the relative position of the lead wire 21 and the sheath 22 can be limited, and then the lead wire assembly 20 can be prevented from being extruded by external force or the gap between the sheath 22 and the lead wire 21 at the position of the extrusion part caused by the injection pressure during injection, and then the plastic encapsulation material can be prevented from flowing to the downstream of the extrusion position of the lead wire assembly 20 by the gap between the sheath 22 and the lead wire 21, the plastic encapsulation material is prevented from melting the sheath 22 and the lead wire 21, the insulation performance of the coil component is ensured, and the risk of electrical failure is reduced.

[0057] As shown in Figures 1 to 5 , the X direction is the width direction, and the Y direction is the thickness direction. As shown in Figure 1 , in the application, the lead wire assembly 20 has different sizes in the thickness direction and the width direction, and the size of the lead wire assembly 20 in the thickness direction is smaller than the size in the width direction. As shown in Figure 2 , the lead wire assembly 20 has the same size in the thickness direction and the width direction. The application is mainly used to solve the injection problems of the lead wire assembly 20 with different sizes in the thickness direction and the width direction, but when the lead wire assembly 20 with the same size in the thickness direction and the width direction has the above problems, the above method can also be used to solve the problems.

[0058] Among them, before the lead wire assembly 20 and the coil body 10 are injection molded at one time, the wire sheath structure 30 is arranged on the lead wire assembly 20, the wire sheath structure 30 can be integrally injection molded with the sheath 22, or the wire sheath structure 30 is separately processed and then installed outside the sheath 22.

[0059] Specifically, when the lead wire assembly 20 and the coil body 10 are injection molded at one time, part of the lead wire assembly 20 is located in the mold, and in the absence of the wire sheath structure 30, the lead wire assembly 20 is deformed under the influence of the injection pressure, a gap is generated between the sheath 22 and the lead wire 21, the plastic encapsulation material enters the sheath 22 from the gap between the sheath 22 and the lead wire 21, and the plastic encapsulation material flows along the inside of the sheath 22. Because the injection pressure is large and the temperature of the plastic encapsulation material is high, the sheath 22 is easily melted by high temperature, and the plastic encapsulation material overflows from the melted position; or in the process of injection, part of the plastic encapsulation material solidifies during flowing, and the solidified plastic encapsulation material easily cuts the sheath 22, and the subsequent flowing plastic encapsulation material continues to flow and overflows from the cut position. By using the above structure, the wire sheath structure 30 can prevent the plastic encapsulation material from flowing to the downstream of the extrusion position of the lead wire assembly 20, so that the plastic encapsulation material can be prevented from melting or cutting the sheath 22, and the insulation performance of the coil component is ensured.

[0060] As shown in Figure 3 and Figure 4As shown, the wire protection structure 30 has a first accommodating cavity 31, the extrusion part is located in the first accommodating cavity 31, the wire assembly 20 is arranged in the first accommodating cavity 31, and at least part of the wire 21 and the sheath 22 are located in the extrusion part. Alternatively, in other embodiments, a plurality of extrusion protrusions can be arranged in the first accommodating cavity 31 to form the extrusion part, and the plurality of extrusion protrusions extrude the wire 21 and the sheath 22. In this embodiment, the wire protection structure 30 has a relative arrangement of the thickness direction and the width direction, that is, as shown in the figure Figures 1 to 5 As shown, the X direction is the width direction, and the Y direction is the thickness direction. In the position of the extrusion part, the size of the first accommodating cavity 31 along the thickness direction is smaller than the size of the wire assembly 20 along the thickness direction, and / or the size of the first accommodating cavity 31 along the width direction is smaller than the size of the wire assembly 20 along the width direction. In this way, the first accommodating cavity 31 can extrude the sheath 22, so that the sheath 22 is deformed, thereby reducing the surrounding area formed by the inner ring of the sheath 22, so that the sheath 22 can be more closely attached to the wire 21, and when the wire assembly 20 is extruded by the outside, due to the extrusion effect of the extrusion part, the sheath 22 and the wire 21 can avoid generating a gap at the extruded position, thereby avoiding the plastic sealing material from entering and flowing to the downstream of the extruded position of the wire assembly 20 by the extrusion part. Moreover, in the above manner, the wire protection structure 30 is simple in structure and easy to process.

[0061] As shown in the figure Figures 1 to 7 In this application, in the position of the extrusion part, the size b2 of the first accommodating cavity 31 along the thickness direction is smaller than the size b1 of the wire assembly 20 along the thickness direction, and the size a2 of the first accommodating cavity 31 along the width direction is greater than the size a1 of the wire assembly 20 along the width direction. Moreover, when the size of the wire assembly 20 in the thickness direction and the width direction is different, that is, when the size of the wire assembly 20 in the thickness direction is smaller than the size in the width direction, the size b2 of the first accommodating cavity 31 along the thickness direction is smaller than the size a2 of the first accommodating cavity 31 along the width direction, and the size b1 of the wire assembly 20 along the thickness direction is smaller than the size a1 of the wire assembly 20 along the width direction. The wire 21 and the sheath 22 are flexible materials. In this way, when the size of the wire assembly 20 in the thickness direction and the width direction is different, the wire assembly 20 is easy to deform along the thickness direction and not easy to deform along the width direction. When the wire assembly 20 is extruded by the extrusion part, the sheath 22 mainly deforms along the thickness direction, and the sheath 22 will deform a little along the width direction, but due to the limited deformation space along the width direction and the difficulty of deformation along the width direction, the sheath 22 will not deform along the width direction in the subsequent injection molding process, which can further avoid the gap between the sheath 22 and the wire 21.

[0062] As shown in the figure Figure 1 And Figure 5As shown, when the wire assembly 20 has different sizes in the thickness direction and the width direction, at the position of the extrusion part, the size b2 of the first accommodating cavity 31 in the thickness direction is smaller than the size b1 of the wire assembly 20 in the thickness direction, 0 < b1-b2 < 0.4 mm; the size a2 of the first accommodating cavity 31 in the width direction is larger than the size a1 of the wire assembly 20 in the width direction, a2-a1 > 1 mm. In this way, when b1-b2 is greater than 0.4 mm and a2-a1 is less than 1 mm, the size of the first accommodating cavity 31 in the thickness direction and the width direction is too small, the deformation of the wire assembly 20 is too large in the process of extruding the wire assembly 20, which increases the processing or assembly difficulty of the wire assembly 20 and the wire protection structure 30, and the extrusion force of the wire protection structure 30 on the wire assembly 20 is too large, which affects the working effect of the wire 21. Therefore, in the present application, b1-b2 is less than 0.4 mm and a2-a1 is greater than 1 mm, in this way, when the wire assembly 20 is extruded, the deformation of the wire assembly 20 can be avoided, the processing or assembly difficulty of the wire assembly 20 and the wire protection structure 30 is reduced, the working effect of the wire 21 is ensured, and the wire protection structure 30 and the wire assembly 20 have a gap in the width direction, the injection material can pass through the gap between the wire protection structure 30 and the wire assembly 20, which reduces the injection pressure at the position of the wire assembly 20.

[0063] Optionally, at the position of the extrusion part, the difference between the size b1 of the wire assembly 20 in the thickness direction and the size b2 of the first accommodating cavity 31 in the thickness direction can be 0.1 mm, 0.2 mm or 0.4 mm. At the position of the extrusion part, the difference between the size a2 of the first accommodating cavity 31 in the width direction and the size a1 of the wire assembly 20 in the width direction can be 1.2 mm, 1.5 mm or 2 mm.

[0064] Further, at the position of the extrusion part, the first accommodating cavity 31 and the wire assembly 20 are in interference fit in the thickness direction, and / or the first accommodating cavity 31 and the wire assembly 20 are in interference fit in the width direction. In the present application, the first accommodating cavity 31 and the wire assembly 20 are in interference fit in the thickness direction, and the first accommodating cavity 31 and the wire assembly 20 are in clearance fit in the width direction, the maximum interference amount is not more than 0.2 mm on one side, and the single-side clearance amount is more than 0.5 mm. In this way, the fixing effect of the wire protection structure 30 on the wire assembly 20 is enhanced, and the gap between the sheath 22 and the wire 21 at the position of the interference fit is avoided, the gap between the first accommodating cavity 31 and the wire assembly 20 is used for material flow in the injection process, and the injection pressure is reduced.

[0065] Specifically, in the present application, the wire protection structure 30 has a first end 301 and a second end 302 arranged oppositely. In the extension direction of the wire assembly 20, the first end 301 is arranged away from the second end 302. The end of the wire assembly 20 for electrical connection with the coil body 10 passes through the first end 301 and the second end 302 in sequence. In the present embodiment, the first end 301 and the second end 302 are respectively located on the two sides of the first accommodating cavity 31 along the axial direction of the wire protection structure 30. The wire protection structure 30 and the wire assembly 20 can adopt interference fit at the first end 301, i.e., the extrusion part is located at the first end 301 of the first accommodating cavity 31; can adopt interference fit at any position from the first end 301 to the second end 302, i.e., the extrusion part is located at any position from the first end 301 to the second end 302; or the first accommodating cavity 31 of the wire protection structure 30 as a whole adopts interference fit with the wire assembly 20, i.e., the extrusion part is located on the whole of the first accommodating cavity 31 of the wire protection structure 30. As long as the extrusion part is in interference fit with the wire assembly 20 in the thickness and / or width direction, it can prevent the gap between the sheath 22 and the wire 21 of the wire assembly 20 at the extrusion position in the thickness and / or width direction.

[0066] As shown in Figure 10 and Figure 11 The coil component further includes an encapsulation layer 40, which encapsulates at least the electrical connection between the coil body 10 and the wire assembly 20, and encapsulates at least part of the wire assembly 20. The extrusion part is located in the encapsulation layer 40. In this way, the encapsulation layer 40 can effectively isolate the wire assembly 20 from the external environment, enhance the electrical insulation performance, and prevent short circuit or electric leakage. At the same time, since the extrusion part is located in the encapsulation layer 40, the encapsulation layer 40 can protect the extrusion part and avoid the failure of the extrusion performance of the extrusion part.

[0067] Further, the wire protection structure 30 is at least partially sleeved on the sheath 22 of the wire assembly 20. After the electrical connection between the coil body 10 and the wire assembly 20, the assembly is injection molded to form the coil component. At least the wire protection structure 30 between the extrusion part and the end of the second end 302 is located inside the encapsulation layer 40. In this way, the extrusion part and the end of the second end 302 are encapsulated by the injection material. Even if there is a gap between the sheath 22 and the wire 21, the injection material enters from the gap position. Since it cannot flow to the downstream of the extrusion part in the sheath 22, even if the injection material in the sheath 22 melts or cuts the wire, the injection material in the sheath 22 and the outside of the broken position of the sheath 22 are both encapsulated by the encapsulation layer 40, which will not cause the insulation failure of the coil component.

[0068] In other embodiments of the present application, the wire protection structure 30 can be completely covered in the encapsulation layer 40 to improve the insulation performance of the coil component.

[0069] In the present application, the coil body 10 is at least partially covered in the encapsulation layer 40, the coil body 10 has a stator housing, a winding, a stator pole plate, etc., and the encapsulation layer 40 encapsulates at least part of the outer circumferential surface of the stator housing.

[0070] Specifically, in the present application, the coil body 10 and the wire assembly 20 can be electrically connected through a circuit board or a terminal, or can be directly electrically connected through the pin of the coil body 10 and the wire assembly 20. The downstream of the extrusion part is away from the one end of the wire assembly 20 and the coil body 10 electrically connected relative to the extrusion part, that is, the downstream of the extrusion part is away from the second end 302 relative to the extrusion part, and the upstream of the extrusion part is close to the one end of the wire assembly 20 and the coil body 10 electrically connected relative to the extrusion part, that is, the upstream of the extrusion part is away from the first end 301 relative to the extrusion part.

[0071] Further, when the wire assembly 20 has the same size in the thickness direction and the width direction, the thickness direction size b1 and the width direction size a1 of the wire assembly 20 are equal, at this time, the extrusion part of the wire protection structure 30 and the wire assembly 20 are at least one direction interference fit, another direction interference fit or gap fit, when the gap fit, the single side gap amount is not more than 0.2mm.

[0072] As shown in Figures 12 to 18 The second accommodating cavity 32 is provided on the side wall of the second accommodating cavity 32, and the limiting protrusion 321 is in abutment with the end portion of the sheath 22 of the electrically connected end of the wire assembly 20, so as to limit the position of the wire assembly 20. That is, part of the wire 21 is exposed outside the sheath 22 at the position of the wire assembly 20 connected with the coil body 10, the limiting protrusion 321 is in abutment with the end portion of the one end of the sheath 22 close to the coil body 10, and the limiting protrusion 321 can limit the relative position of the wire 21 and the wire protection structure 30, so as to ensure the position stability of the wire assembly 20 in the process of assembly and injection molding, avoid the electrical connection problem caused by the position deviation, and improve the accuracy and reliability of the electrical connection. In this way, the limiting protrusion 321 plays a shielding role on the plastic sealing material, and further avoids the plastic sealing material from entering the inside of the wire assembly 20.

[0073] The size of the second accommodating cavity 32 in the thickness direction is smaller than the size of the first accommodating cavity 31 in the thickness direction, and the size of the second accommodating cavity 32 in the width direction is greater than or equal to the size of the first accommodating cavity 31 in the width direction. Alternatively, the size of the second accommodating cavity 32 in the thickness direction is greater than or equal to the size of the first accommodating cavity 31 in the thickness direction, and the size of the second accommodating cavity 32 in the width direction is smaller than the size of the first accommodating cavity 31 in the width direction. In this way, the part of the second accommodating cavity 32 protruding from the first accommodating cavity 31 forms a limiting protrusion 321, and the segmented structure of the second accommodating cavity 32 and the first accommodating cavity 31 can relieve the injection pressure while ensuring the limiting effect of the limiting protrusion 321 on the wire assembly 20.

[0074] In addition, in the present application, the outer diameter of the second accommodating cavity 32 is greater than the outer diameter of the first accommodating cavity 31, which facilitates the staff to distinguish the second accommodating cavity 32 and the first accommodating cavity 31, and reduces the assembly difficulty of the wire protection structure 30 and the wire assembly 20.

[0075] As shown in Figure 13 and Figure 14 , the size b3 of the second accommodating cavity 32 in the thickness direction is greater than or equal to the diameter D1 of the wire 21 and smaller than the size b2 of the first accommodating cavity 31 in the thickness direction, D1≤b3<b2. In this way, the second accommodating cavity 32 can avoid extruding the wire 21, facilitating the installation of the wire assembly 20, ensuring the normal work of the wire 21, and ensuring the effect of the limiting protrusion 321 shielding the injection plastic, thereby reducing the plastic sealing material entering the wire assembly 20. The size a3 of the second accommodating cavity 32 in the width direction is greater than or equal to the size a2 of the first accommodating cavity 31 in the width direction, a2≤a3. In this way, the smoothness of the injection plastic flowing in the second accommodating cavity 32 and the first accommodating cavity 31 can be further ensured, and the injection pressure can be further reduced.

[0076] Further, when the size b1 of the wire assembly 20 in the thickness direction and the size a1 in the width direction are the same, at this time a3<a2; or b3<b2; or a3<a2, b3<b2, so that the limiting protrusion 321 can abut against the end of the sheath 22.

[0077] As shown in Figures 19 to 25 , the utility model embodiment three provides a coil component, which is different from the embodiment two, and the wire protection structure 30 further includes a connecting part 33, the connecting part 33 is used for limiting the relative position of the wire assembly 20 and the coil body 10, specifically, the coil body 10 further includes a pin, and the connecting part 33 is used for limiting the relative position of the wire 21 and the pin, in this way, the electrical connection between the wire 21 and the coil body 10 can be avoided to fail, the stability of the connection between the wire assembly 20 and the coil body 10 can be ensured, the risk of poor contact or short circuit is reduced, and the normal function and performance of the coil component are ensured.

[0078] As shown in Figure 21 and Figure 22 , the connecting part 33 is clamped with the coil body 10, that is, the connecting part 33 has a clamping hook which is clamped with the clamping groove of the coil body 10. Specifically, the coil body 10 further comprises a stator shell and a skeleton, and the clamping groove can be arranged on the stator shell or the skeleton. In this way, the connecting part 33 and the coil body 10 can be quickly and conveniently assembled, and the connection between the wire assembly 20 and the coil body 10 is stable, reducing loosening or falling caused by vibration or external force impact, and improving the reliability and durability of the coil component in a complex working environment.

[0079] As shown in Figure 21 , 22 , the wire assembly 20 comprises a plurality of wires 21, and the sheath 22 is arranged outside the plurality of wires 21. The connecting part 33 has a plurality of independently arranged partition cavities 331, and the plurality of partition cavities 331 are arranged one-to-one corresponding to the plurality of wires 21, and the wire 21 is located in the corresponding partition cavity 331. In this way, each wire 21 is located in an independent partition cavity 331, avoiding direct contact between the wires 21, significantly enhancing the insulation performance of the electrical system, reducing the risk of short circuit, and improving the overall electrical safety.

[0080] Embodiment four of the utility model provides a coil component, which is different from embodiment one in that the wire protection structure 30 further comprises a connecting part 33, and the connecting part 33 is detachably connected with the coil body 10 to limit the relative position of the wire assembly 20 and the coil body 10. In this way, the relative arrangement between the wire assembly 20 and the coil body 10 can be limited, avoiding the failure of the electrical connection between the wire 21 and the coil body 10, and the wire assembly 20 can be extruded to avoid the injection of plastic into the interior of the wire assembly 20.

[0081] Embodiment five of the utility model provides an electronic expansion valve, which comprises the coil component provided above. In this way, the electronic expansion valve using the coil component above can avoid the melting of the sheath 22 and the wire 21 by plastic encapsulation material during the injection process, reducing the risk of electrical failure of the electronic expansion valve, thereby improving the reliability of the electronic expansion valve.

[0082] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0083] The recitation of components and steps in the present embodiments by relative arrangement, numerical expression, and numerical values is not intended to limit the scope of the present application unless otherwise specifically stated. Also, it is to be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because such techniques, methods, and apparatus are considered to be part of the state of the art. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation on the scope of the exemplary embodiments. Thus, other examples of the exemplary embodiments can have different values. It is to be noted that like numbers and letters refer to like elements throughout the several views of the drawings and that one or more specific embodiments can be substantially similar to the examples described herein except in their details of construction, arrangement, or use.

[0084] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0085] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0086] In addition, it needs to be explained that the use of "first", "second" and the like to define parts only facilitates the differentiation of corresponding parts, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as a limitation on the protection scope of the present application.

[0087] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coil component characterized by comprising: The coil component comprises: a coil body (10); a wire assembly (20) comprising a wire (21) and a sheath (22), the wire (21) being directly or indirectly electrically connected with the coil body (10), the sheath (22) being sleeved outside the wire (21); a wire protection structure (30) sleeved on the wire assembly (20) and arranged close to the coil body (10), the wire protection structure (30) having a pressing portion sleeved outside the sheath (22), the pressing portion being capable of pressing the wire (21) and the sheath (22) to limit the relative position of the wire (21) and the sheath (22).

2. The coil component according to claim 1, characterized by The wire protection structure (30) has a first accommodating cavity (31), the pressing portion is located in the first accommodating cavity (31), the wire assembly (20) is arranged in the first accommodating cavity (31), at least part of the wire (21) and the sheath (22) are located in the pressing portion, the first accommodating cavity (31) has a thickness direction and a width direction arranged oppositely, in the pressing portion, the size of the first accommodating cavity (31) in the thickness direction is smaller than the size of the wire assembly (20) in the thickness direction, and / or the size of the first accommodating cavity (31) in the width direction is smaller than the size of the wire assembly (20) in the width direction.

3. The coil assembly of claim 2, wherein, In the pressing portion, the size b2 of the first accommodating cavity (31) in the thickness direction is smaller than the size b1 of the wire assembly (20) in the thickness direction, 0 < b1-b2 < 0.4 mm; the size a2 of the first accommodating cavity (31) in the width direction is greater than the size a1 of the wire assembly (20) in the thickness direction, a2-a1 > 1 mm.

4. The coil assembly of claim 2, wherein, In the pressing portion, the first accommodating cavity (31) and the wire assembly (20) are in interference fit in the thickness direction, and / or the first accommodating cavity (31) and the wire assembly (20) are in interference fit in the width direction.

5. The coil assembly of claim 1, wherein, The coil component further comprises: an encapsulation layer (40) encapsulating at least the electrical connection between the coil body (10) and the wire assembly (20), and encapsulating at least part of the wire assembly (20), the pressing portion being located in the encapsulation layer (40).

6. The coil assembly of claim 2, wherein, The wire protection structure (30) has a second accommodating cavity (32) arranged close to the coil body (10) relative to the first accommodating cavity (31), a limiting protrusion (321) being arranged on the side wall of the second accommodating cavity (32), the limiting protrusion (321) abutting against the end of the sheath (22) on the wire assembly (20) and the electrical connection end of the coil body (10) to limit the position of the wire assembly (20).

7. The coil assembly of claim 6, wherein, The second accommodating cavity (32) has a size in the thickness direction smaller than that of the first accommodating cavity (31), and a size in the width direction greater than or equal to that of the first accommodating cavity (31); or the second accommodating cavity (32) has a size in the thickness direction greater than or equal to that of the first accommodating cavity (31), and a size in the width direction smaller than that of the first accommodating cavity (31).

8. The coil assembly of claim 7, wherein, The second accommodating cavity (32) has a size b3 in the thickness direction greater than or equal to the diameter D1 of the wire (21) and smaller than the size b2 of the first accommodating cavity (31) in the thickness direction, and D1≤b3<b2; and a size a3 in the width direction greater than or equal to the size a2 of the first accommodating cavity (31) in the width direction, and a2≤a3.

9. The coil assembly of claim 1, wherein, The wire protection structure (30) further comprises a connecting portion (33) fixedly connected with the coil body (10) to limit the relative position of the wire assembly (20) and the coil body (10).

10. The coil assembly of claim 9, wherein, The connecting portion (33) is in clamping fit with the coil body (10).

11. The coil assembly of claim 9, wherein, The wire assembly (20) comprises a plurality of wires (21), and the sheath (22) is sleeved outside the plurality of wires (21); the connecting portion (33) has a plurality of independently arranged separation cavities (331), and the plurality of separation cavities (331) are arranged in one-to-one correspondence with the plurality of wires (21), and the wires (21) are located in the corresponding separation cavities (331).

12. An electronic expansion valve characterized by The electronic expansion valve comprises the coil component according to any one of claims 1 to 11.

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