Transformer shell with copper nails

Abstract

The utility model discloses a transformer shell with copper nails, which comprises a shell body, the shell body is provided with at least two vertically through jacks, a copper nail is inserted into each jack, at least one end of each copper nail is provided with a clamping part, the clamping parts are inserted into the jacks, and the copper nails are inserted into the jacks. The cross section area of the clamping part is gradually reduced from the middle position close to the copper nail to the end position of the copper nail, the shape of the inserting hole is matched with the shape of the clamping part, the cross section area of the inserting hole is gradually reduced from top to bottom, and the lower end of the copper nail penetrates through the inserting hole and extends downwards by a proper length. The copper nail has the advantages of being simple in structure, easy to assemble and the like, the clamping portion with the thick upper portion and the thin lower portion is arranged at the lower end of the copper nail and can be clamped with the inserting hole in the shell, it can be guaranteed that the lower end faces of all the copper nails are flush, the situation that the lengths are different is avoided, and the copper nails can be firmly fixed to the transformer shell without dispensing; the assembling steps of the transformer are simplified, and the assembling cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer shell with copper nails. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. It is mainly composed of a shell and a coil assembly, and the coil assembly is installed in the shell.

[0003] like Figure 5 As shown, each coil of the coil assembly has a lead-out terminal, and the lead-out terminal has a hole. When assembling, the coil assembly needs to be assembled first, and then the copper nails are passed through the holes and plugged into the shell. The lower ends of the copper nails must pass through the bottom of the shell, and ensure that the lower end faces of all the copper nails are flush. In the prior art, the copper nails are straight strips, and the plug holes on the shell for copper nail plugging are also rectangular holes. When the copper nails pass through the plug holes from top to bottom, since the size of the rectangular hole is slightly larger than the cross-sectional size of the copper nails, the copper nails can still move relatively after being inserted into the plug holes. This will cause a problem. After the copper nails are inserted into the plug holes, the parts of the copper nails that leak out from the bottom of the shell are of different lengths, and the lower end faces are not flush.

[0004] Therefore, in order to solve this problem, a reference plate needs to be set at the bottom of the shell during assembly. The copper nails pass through the jacks downwards and abut against the reference plate to ensure that the lower end faces of all the copper nails are flush. At the same time, glue needs to be applied at the connection between the copper nails and the jacks, so that the copper nails are fixed on the shell and cannot move up and down relative to the jacks. Finally, the lead end of the coil is welded to the copper nails.

[0005] Therefore, due to the limitations of the copper nails and the shell assembly structure, a reference plate is required to ensure that the lower end surfaces of all the copper nails are flush, and then an additional gluing process is added to fix the copper nails to the shell, which undoubtedly makes the transformer assembly steps cumbersome and greatly increases the transformer assembly cost. Utility Model Content

[0006] The utility model aims to solve the above problems and designs a transformer shell with copper nails, thereby solving the problem that the copper nails on the transformer shell are not firmly inserted and need to be fixed with glue, thereby increasing the transformer assembly cost.

[0007] To achieve the above-mentioned purpose, the technical solution of the utility model is a transformer housing with copper nails, including a housing body, the housing body is provided with at least two vertically penetrating jacks, each of which is plugged with a copper nail, at least one end of the copper nail is provided with a clamping portion, the clamping portion is plugged with the jack, the cross-sectional area of ​​the clamping portion gradually decreases from the middle position close to the copper nail to the end position of the copper nail, the shape of the jack is adapted to the shape of the clamping portion, and the cross-sectional area of ​​the jack gradually decreases from top to bottom, and the lower end of the copper nail passes through the jack and extends downward by an appropriate length.

[0008] Preferably, a clamping portion is provided at one end of the copper nail, and the clamping portion and the plug hole are both truncated cone-shaped, and both the clamping portion and the plug hole are thick at the top and thin at the bottom.

[0009] Preferably, a clamping portion is provided at one end of the copper nail, and the clamping portion and the plug hole are both prism-shaped, and both the clamping portion and the plug hole are thick at the top and thin at the bottom.

[0010] Preferably, the shapes of the clamping portion and the plug hole are both flat, and both are wide at the top and narrow at the bottom.

[0011] Preferably, a clamping portion is provided at one end or both ends of the copper nail.

[0012] Preferably, the side surface of the clamping portion is flush with the side surface of the copper nail.

[0013] Compared with the prior art, the beneficial effects are:

[0014] The utility model has the advantages of simple structure and easy assembly. The lower end of the copper nail is provided with a clamping part which is thick at the top and thin at the bottom, and a socket matched with the shape of the clamping part is opened on the shell. When the clamping part is inserted into the socket and clamped in place, the copper nail cannot move downward further, so that the lower end faces of all the copper nails are guaranteed to be flush without the situation of different lengths. At the same time, the process of gluing is reduced. The copper nail can be firmly fixed on the transformer shell without gluing, which simplifies the assembly steps of the transformer and reduces the assembly cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the utility model;

[0016] Figure 2 It is a schematic diagram of the installation structure of the copper nail in Example 1 of the utility model;

[0017] Figure 3 This is a schematic diagram of the installation structure of the copper nail in Example 2 of the utility model;

[0018] Figure 4 This is a schematic diagram of the installation structure of the copper nail in Example 3 of the present utility model;

[0019] Figure 5 It is a schematic diagram of the installation structure of copper nails in the prior art.

[0020] In the figure, 1, shell body; 11, jack; 2, copper nail; 21, clamping part. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] like Figure 1 As shown, a preferred embodiment of the utility model proposes a transformer housing with copper nails, which mainly includes a housing body 1 and at least two copper nails 2 plugged into the housing body 1, and the number of the copper nails 2 is consistent with the number of coils installed in the housing body 1. At the same time, at least two vertically penetrating jacks 11 are provided on the housing body 1, and the number of the jacks 11 is the same as the number of the copper nails 2. The copper nails 2 pass through the jacks 11 from top to bottom, and the lower end of the copper nail 2 passes through the bottom of the housing body 1 and extends downward for a certain length, serving as the connection end of the transformer.

[0024] refer to Figure 2 A clamping portion 21 is provided on the lower side of the copper nail 2. The cross-sectional area of ​​the clamping portion 21 gradually decreases from top to bottom, and the cross-sectional area of ​​the socket 11 also gradually decreases from top to bottom. When the copper nail 2 is inserted into the socket 11, the clamping portion 21 will be plugged into the socket 11. After the clamping portion 21 is clamped in place, it cannot continue to move downward along the socket 11. The clamping portion 21 is clamped into the socket 11. In this way, the copper nail 2 can be fixed on the shell body 1. At the same time, the lower ends of all the copper nails 2 are flush, and it is impossible to correct the leveling by the reference plate.

[0025] In this embodiment, the shape of the clamping portion 21 is flat, wide at the top and narrow at the bottom, and its maximum cross-sectional size is consistent with the cross-sectional size of the copper nail 2. The four sides of the clamping portion 21 are flush with the four sides of the copper nail 2, so that the copper nail 2 will appear more beautiful. The shape of the plug hole 11 is also flat, and its shape is compatible with the shape of the clamping portion 21. After the clamping portion 21 is clamped in place, it cannot move downward further, so that the lower end surfaces of all the copper nails 2 can be ensured to be flush, while reducing the step of dispensing glue.

[0026] Since the size of the clamping portion 21 is not much different from that of the copper nail 2 and is difficult to distinguish with the naked eye, the clamping portion 21 can be set at one end of the copper nail 2, or at both ends. In this way, the copper nail 2 does not have a front and back end, and both ends can be plugged into the socket 11.

[0027] The copper nail 2 and the shell body 1 of the transformer shell can be assembled together when leaving the factory. When the finished product is assembled, since the position of the copper nail 2 has been fixed, the hole on the lead-out end of the coil assembly can just pass through the copper nail 2 without misalignment. Finally, the lead-out end and the copper nail 2 are spot-welded.

[0028] Example 2

[0029] like Figure 3 As shown, the difference between Example 2 and Example 1 is that the shape of the clamping portion 21 on the copper nail 2 is a truncated cone, and the shape of the socket 11 is also a truncated cone. The clamping portion 21 and the socket 11 are both thicker at the top and thinner at the bottom. The function is the same as that of Example 1. After the clamping portion 21 is clamped in place, it cannot move downward further. In this way, the lower end surfaces of all the copper nails 2 can be ensured to be flush, and the step of gluing is reduced.

[0030] The connection between the truncated cone-shaped clamping portion 21 and the jack 11 will be tighter, so that the copper nail 2 will be fixed more securely.

[0031] Example 3

[0032] like Figure 4 As shown, the difference between Example 3 and Example 1 is that the shape of the clamping portion 21 on the copper nail 2 is a prism shape, and the shape of the plug hole 11 is also a prism shape. The clamping portion 21 and the plug hole 11 are both thick at the top and thin at the bottom, and the function is the same as that of Example 1. After the clamping portion 21 is clamped in place, it cannot move downward, so that the lower end surfaces of all copper nails 2 can be kept flush. At the same time, the connection between the truncated cone-shaped clamping portion 21 and the plug hole 11 will be tighter, so that the copper nail 2 will be more securely fixed.

[0033] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the utility model. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the utility model and fall within the protection scope of the utility model.

Claims

1. A transformer housing with copper nails, comprising a housing body (1), wherein the housing body (1) is provided with at least two vertically extending insertion holes (11), each insertion hole (11) being inserted with a copper nail (2), characterized in that: At least one end of the copper nail (2) is provided with a clamping portion (21), the clamping portion (21) is plugged into the insertion hole (11), the cross-sectional area of ​​the clamping portion (21) gradually decreases from a middle position close to the copper nail (2) to an end position of the copper nail (2), the shape of the insertion hole (11) is adapted to the shape of the clamping portion (21), and the cross-sectional area of ​​the insertion hole (11) gradually decreases from top to bottom, and the lower end of the copper nail (2) passes through the insertion hole (11) and extends downward by an appropriate length.

2. A transformer housing with copper nails according to claim 1, characterized in that: One end of the copper nail (2) is provided with a clamping portion (21), and the clamping portion (21) and the insertion hole (11) are both truncated cone-shaped, and both the clamping portion (21) and the insertion hole (11) are thick at the top and thin at the bottom.

3. The transformer housing with copper nails according to claim 1, characterized in that: One end of the copper nail (2) is provided with a clamping portion (21), and the clamping portion (21) and the insertion hole (11) are both prism-shaped, and both the clamping portion (21) and the insertion hole (11) are thick at the top and thin at the bottom.

4. The transformer housing with copper nails according to claim 1, characterized in that: The clamping portion (21) and the insertion hole (11) are both flat in shape, and both the clamping portion (21) and the insertion hole (11) are wide at the top and narrow at the bottom.

5. The transformer housing with copper nails according to claim 4, characterized in that: One end or both ends of the copper nail (2) are provided with a clamping portion (21).

6. The transformer housing with copper nails according to claim 5, characterized in that: The side surface of the clamping portion (21) is flush with the side surface of the copper nail (2).

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