Structure of I-shaped winding framework of assembled transformer

Abstract

The utility model belongs to the technical field of transformer manufacturing, and particularly relates to a structure of an I-shaped winding framework of a split mounting type transformer. Comprising upper and lower plates, left and right side plates and front and rear side plates, the two up-down plates are symmetrically arranged up and down, the two left-right side plates are clamped to the side walls of left and right inner cavities of the two up-down plates correspondingly, and the two front-back side plates are clamped to the side walls of front and back inner cavities of the two up-down plates correspondingly. And the left and right side walls of the two front and rear side plates are respectively clamped with the front and rear side walls of the two left and right side plates. The utility model can be well applied to the I-shaped winding framework of the non-standard transformer, and has the advantages of relatively simple structure, low cost and easiness in implementation.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer manufacturing, and particularly relates to the structure of an assembled transformer I-shaped winding skeleton. Background Art

[0002] Transformer design utilizes EI inserts and non-standard CD and ED wound cores. A variety of I-shaped winding bobbins are available, most commonly injection-molded, with standard magnetic or iron cores. To achieve certain performance requirements, high-temperature applications sometimes preclude the use of injection-molded bobbins with relatively low temperature ratings, forcing the use of non-standard I-shaped bobbins. However, traditional bar turning and milling methods result in significant material waste, time-consuming processing, high costs, and long cycle times. Furthermore, due to the required thin wall thickness, yields are often low. Utility Model Content

[0003] The purpose of the utility model is to provide an assembled transformer I-shaped winding frame structure, which is assembled by upper and lower plates, front and rear side plates and left and right side plates. The structure is relatively simple, the cost is low, and it is easy to implement.

[0004] In order to solve the above technical problems, the utility model provides a structure of an assembled transformer I-shaped winding skeleton, including: upper and lower plates, left and right side plates and front and rear side plates; the two upper and lower plates are arranged symmetrically up and down, and the left and right inner cavity side walls of the two upper and lower plates are respectively clamped with the two left and right side plates, and the front and rear inner cavity side walls of the two upper and lower plates are respectively clamped with the two front and rear side plates, and the left and right side walls of the two front and rear side plates are respectively clamped with the front and rear side walls of the two left and right side plates.

[0005] Preferably, the upper and lower plates further include a U-shaped groove, and the left and right inner walls of the U-shaped groove further include a first card groove.

[0006] Preferably, the front and rear side walls of the left and right side panels further include a second card slot, and the upper and lower ends of the left and right side panels further include a first card block.

[0007] Preferably, the front and rear side panels are I-shaped panels, and the left and right side walls of the I-shaped panels further include a second clamping block.

[0008] Preferably, the front and rear inner walls of the U-shaped groove are used to be clamped with the I-shaped plate, and the upper and lower end shoulders of the I-shaped plate are abutted against the upper and lower plates, the first clamping groove is clamped with the first clamping block, and the second clamping groove is clamped with the second clamping block.

[0009] Preferably, the clamping joints of the skeleton structure are evenly coated with a curing adhesive layer, and the curing adhesive layer adopts a single-component epoxy resin adhesive.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The utility model is assembled by upper and lower plates, front and rear side plates and left and right side plates, with convex and concave steps and bayonet slots (i.e., card blocks and card slots) that lock each other, and are glued with single-component resin glue and then dried. It can be well used for non-standard I-shaped winding skeletons of transformers, has a relatively simple structure, low cost, and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of an I-shaped winding bobbin for an assembled transformer of the present invention; (a) is a main view, and (b) is a side view.

[0013] Figure 2 It is a structural diagram of the upper and lower plates of the utility model.

[0014] Figure 3 It is a structural diagram of the left and right side panels of the utility model.

[0015] Figure 4 It is a structural diagram of the front and rear side panels of the utility model.

[0016] In the figure: 1-upper and lower plates, 101-U-shaped slot, 102-card slot 1, 2-left and right side plates, 201-card slot 2, 202-card block 1, 3-front and rear side plates, 301-card block 2, 302-shoulder. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0018] like Figures 1 to 4 As shown, an embodiment of the utility model provides a structure of an assembled transformer I-shaped winding skeleton, including: an upper and lower plate 1, left and right side plates 2 and front and rear side plates 3; the two upper and lower plates 1 are arranged symmetrically up and down, and the two left and right side plates 2 are respectively clamped on the left and right inner cavity side walls of the two upper and lower plates 1, and the two front and rear side plates 3 are respectively clamped on the front and rear inner cavity side walls of the two upper and lower plates 1, and the left and right side walls of the two front and rear side plates 3 are respectively clamped with the front and rear side walls of the two left and right side plates 2.

[0019] The upper and lower plates 1 further include a square-shaped groove 101 , and the left and right inner walls of the square-shaped groove 101 further include a clamping groove 102 .

[0020] The front and rear side walls of the left and right side panels 2 further include a second card slot 201 , and the upper and lower ends of the left and right side panels 2 further include a first card block 202 .

[0021] The front and rear side panels 3 are I-shaped panels, and the left and right side walls of the I-shaped panels further include second clamping blocks 301 .

[0022] The front and rear inner walls of the U-shaped groove 101 are used to be clamped with the I-shaped plate, and the upper and lower shoulders 302 of the I-shaped plate are in contact with the upper and lower plates 1, the clamping groove 1 102 is clamped with the clamping block 1 202, and the clamping groove 2 201 is clamped with the clamping block 2 301.

[0023] The clamping joints of the skeleton structure are evenly coated with a curing adhesive layer, which adopts a single-component epoxy resin adhesive.

[0024] The present invention also specifically discloses the following parts material selection, processing methods and tolerance requirements:

[0025] Depending on the requirements of use, epoxy boards, nylon boards, bakelite boards, etc. can be selected for parts processing. The thickness of the board is selected according to the circumference and length of the I-shaped frame and the thickness of the wire when the frame is wound. If the board is too thin, the front and rear, left and right side panels 2 are easily deformed by stress during winding, affecting the later assembly of the transformer.

[0026] Parts processing is generally done by CNC milling machines, because the milling cutter processing method, Figure 2 The right angles on the inner cavities of the upper and lower panels 1 will have R corners, which need to be trimmed and cleared. Otherwise, they will not fit effectively with the front, rear, left and right side panels 2 during assembly. Similarly, the right angles on the bosses and recesses on the front, rear, left and right side panels 2 need to be trimmed and cleared after machining to ensure effective fit during assembly.

[0027] The frame is an assembled structure, requiring coordinated dimensions. Bosses are a negative tolerance on the base dimension, with a maximum tolerance of -0.1mm. Too large can cause loose assembly and shifting, while too small can prevent assembly. Recesses are a positive tolerance on the base dimension, with a maximum tolerance of +0.1mm. Like bosses, too large or too small tolerances can affect assembly. The protrusion and recess dimensions of bosses and recesses are determined by the thickness of the sheet metal. Positional tolerances should also be carefully considered during processing; excessive deflection can also cause assembly problems.

[0028] The utility model also discloses the following I-shaped frame assembly sequence and glue reinforcement:

[0029] After the parts are machined and trimmed, they need to be assembled in order. First, join the two upper and lower panels 1 and the two front and rear side panels 3 together. The frame is not effectively supported, so they need to be supported as much as possible. Install one left or right side panel 2 and fit it into the recessed platform with appropriate deformation. Then, gently flip it 180° and install the other left or right side panel 2 in the same way. The I-shaped frame is supported and locked together.

[0030] The frame is glued together using a one-component epoxy adhesive. Preheat the frame at 110°C for one hour. To facilitate application, heat the epoxy adhesive until it has a certain fluidity. Remove the heated frame and use a brush to evenly apply a layer of adhesive to the joints, applying a larger amount of adhesive where the concave and convex surfaces meet. Heat in an oven at 130°C for two hours to cure. Once cured, the I-shaped frame is bonded together, providing excellent strength.

[0031] The above description is only a description of the preferred embodiment of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A structure of an I-shaped winding bobbin for an assembled transformer, characterized in that: include: Upper and lower plates (1), left and right side plates (2) and front and rear side plates (3); the two upper and lower plates (1) are arranged symmetrically in an upper and lower direction, the left and right inner cavity side walls of the two upper and lower plates (1) are respectively clamped with the two left and right side plates (2), the front and rear inner cavity side walls of the two upper and lower plates (1) are respectively clamped with the two front and rear side plates (3), and the left and right side walls of the two front and rear side plates (3) are respectively clamped with the front and rear side walls of the two left and right side plates (2).

2. The structure of the I-shaped winding bobbin of an assembled transformer according to claim 1, characterized in that: The upper and lower plates (1) further include a U-shaped groove (101) provided thereon, and the left and right inner walls of the U-shaped groove (101) further include a first clamping groove (102) provided thereon.

3. The structure of the I-shaped winding bobbin of an assembled transformer as claimed in claim 2, characterized in that: The front and rear side walls of the left and right side panels (2) further include a second card slot (201) provided thereon, and the upper and lower ends of the left and right side panels (2) further include a first card block (202) provided thereon.

4. The structure of the I-shaped winding bobbin for an assembled transformer as claimed in claim 3, characterized in that: The front and rear side plates (3) are I-shaped plates, and the left and right side walls of the I-shaped plates further include a second clamping block (301).

5. The structure of the I-shaped winding bobbin for an assembled transformer as claimed in claim 4, characterized in that: The front and rear inner walls of the U-shaped groove (101) are used to be clamped with the I-shaped plate, and the upper and lower end shoulders (302) of the I-shaped plate are in contact with the upper and lower plates (1), the first clamping groove (102) is clamped with the first clamping block (202), and the second clamping groove (201) is clamped with the second clamping block (301).

6. The structure of an assembled transformer I-shaped winding bobbin according to any one of claims 1 to 5, characterized in that: The clamping joints of the skeleton structure are evenly coated with a curing adhesive layer, and the curing adhesive layer adopts a single-component epoxy resin adhesive.

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