Anti-loosening transformer iron core

Abstract

The utility model discloses an anti-loosening transformer iron core, which comprises an iron core main body, channel steel used for clamping the iron core main body, a support rod, a screw rod and a bolt, and further comprises a positioning ring and an L-shaped bolt assembly, the positioning ring is arranged between a nut and the channel steel, and the screw rod coaxially penetrates through the positioning ring; the positioning ring is prevented from rotating through a limiting structure between the positioning ring and the channel steel; a first inserting hole is formed in one side of the positioning ring, an elastic telescopic end used for being inserted into the first inserting hole is arranged at one end of the L-shaped plug pin assembly, a second inserting hole is formed in the circumferential side of the nut, and an elastic telescopic end used for being inserted into the second inserting hole is also arranged at the other end of the L-shaped plug pin assembly. According to the anti-loosening transformer iron core, the defect that the transformer iron core formed by stacking the silicon steel sheets is loosened along with the loosening of the nut can be overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an anti-loosening transformer iron core. Background Art

[0002] The transformer core is the main magnetic circuit part of the transformer. It is usually made up of several silicon steel sheets stacked together and clamped and fixed by clamps, which rely on screws and nuts to clamp the transformer core.

[0003] When the transformer is working, magnetostriction and magnetic leakage of silicon steel sheets will cause the core to vibrate, which in turn causes the nut to vibrate. After long-term use, the nut will loosen, causing the distance between the two nuts on the same screw to increase, thereby causing the spacing between the clamps to increase, and then causing the core composed of several stacked silicon steel sheets to loosen. The loose core will have a negative impact on the normal operation of the transformer, such as: gaps are generated at the splicing positions of the silicon steel sheets, resulting in increased magnetic resistance, increased heat, poor conversion efficiency, increased noise, etc.

[0004] Therefore, it is necessary to develop an anti-loosening transformer core in view of the above defects. Utility Model Content

[0005] The utility model aims to provide an anti-loosening transformer iron core, which can solve the defect that the transformer iron core formed by stacking silicon steel sheets will become loose due to the loosening of nuts.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model discloses an anti-loosening transformer core, comprising an iron core body formed by stacking a plurality of silicon steel sheets and a clamping mechanism for clamping the iron core body, wherein the clamping mechanism comprises a clamping frame and a screw tensioning assembly, wherein two clamping frames are symmetrically arranged on both sides of the iron core body, and the two clamping frames are tightened by the screw tensioning assembly; the clamping frame is in the form of a regular quadrilateral frame, wherein the clamping frame comprises two upper and lower channel steels and two left and right support rods for welding and connecting the upper and lower channel steels, wherein the channel steel of one clamping frame and the channel steel of another clamping frame are arranged back to back and clamp the upper yoke and the lower yoke of the iron core body; the screw tensioning assembly comprises a screw and a nut, wherein four screws are provided, and the four screws respectively penetrate the corresponding channel steels at the four corners of the clamping mechanism and are fastened with the nuts;

[0008] It also includes a positioning ring and an L-shaped latch assembly, the positioning ring is arranged between the nut and the channel steel, and the screw rod coaxially passes through the positioning ring; a limiting structure is used between the positioning ring and the channel steel to prevent the positioning ring from rotating; a first plug hole is provided on one side of the positioning ring, and an elastic telescopic end for inserting into the first plug hole is provided at one end of the L-shaped latch assembly, a second plug hole is provided on the circumferential side of the nut, and the elastic telescopic end for inserting into the second plug hole is also provided at the other end of the L-shaped latch assembly.

[0009] Furthermore, the L-shaped latch assembly includes an L-shaped rod, a cylindrical latch and a compression spring, the L-shaped rod is formed by bending a round rod, both ends of the L-shaped rod are provided with cylindrical blind holes, and each blind hole is provided with a cylindrical latch, the cylindrical latch is slidably matched with the blind hole, the compression spring is coaxially arranged in the blind hole, one end of the compression spring is abutted against the inner end of the cylindrical latch, and the other end of the compression spring is abutted against the bottom wall of the blind hole; the outer end of one cylindrical latch is plugged into the first socket, and the outer end of another cylindrical latch is plugged into the second socket; a plurality of the first sockets are provided on the positioning ring, and the plurality of the first sockets are evenly distributed around the circumference.

[0010] Furthermore, both ends of the L-shaped rod are respectively provided with a strip sliding hole connected to the blind hole, and the strip sliding hole is opened along the axial direction of the blind hole; the inner end of the cylindrical pin is provided with a fixing rod, and the fixing rod protrudes out of the strip sliding hole, and the fixing rod is slidably matched with the strip sliding hole.

[0011] Furthermore, a skirt is provided at one end of the nut, a circular through hole matching the cylindrical pin is opened on the skirt, the circular through hole corresponds to the position of the second socket, and an outer end of the cylindrical pin passes through the circular through hole and is plugged into the first socket.

[0012] Furthermore, the limiting structure includes two positioning holes spaced apart on one side of the positioning ring and two positioning pins spaced apart and fixed on one side of the channel steel, and the positioning pins correspond to and are plugged into the positioning holes one by one.

[0013] Compared with the prior art, the beneficial technical effects of the utility model are:

[0014] The utility model discloses an anti-loosening transformer core, wherein the limiting structure prevents the positioning ring from rotating, the positioning ring limits the L-shaped latch assembly, the L-shaped latch assembly and the nut are mutually constrained, and the nut cannot be loosened, so that the distance between the two nuts on each of the screw rods will not change, the spacing between the two clamping frames will remain unchanged, and the transformer core formed by stacking silicon steel sheets will not loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the exploded structure at A in the middle;

[0018] Figure 3 It is a schematic diagram of a three-dimensional cross-sectional structure of a positioning ring of the utility model;

[0019] Figure 4 This is a schematic diagram of a three-dimensional cross-sectional structure of a nut of the utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of an L-shaped latch assembly of the utility model;

[0021] Figure 6 for Figure 5 Schematic diagram of the half-section structure.

[0022] Explanation of the accompanying drawings: 1. Core body; 2. Clamping frame; 201. Locating pin; 202. Channel steel; 203. Support rod; 3. Screw; 4. Nut; 401. Second plug hole; 402. Skirt; 5. Locating ring; 501. First plug hole; 502. Locating plug hole; 6. L-shaped rod; 601. Strip sliding hole; 7. Cylindrical pin; 701. Fixing rod; 8. Compression spring. DETAILED DESCRIPTION

[0023] The core of the utility model is to provide an anti-loosening transformer iron core, which can solve the defect that the transformer iron core formed by stacking silicon steel sheets will become loose due to the loosening of nuts.

[0024] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "middle", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] In a specific embodiment of the present invention, Figures 1 to 6 As shown, it includes an iron core body 1 formed by stacking a number of silicon steel sheets and a clamping mechanism for clamping the iron core body 1, the clamping mechanism includes a clamping frame 2 and a screw tensioning assembly, two clamping frames 2 are symmetrically arranged on both sides of the iron core body 1, and the two clamping frames 2 are tightened by the screw tensioning assembly; the clamping frame 2 is in the form of a regular quadrilateral frame, the clamping frame 2 includes two upper and lower channel steels 202 and two left and right support rods 203 for welding and connecting the upper and lower channel steels 202, the channel steel 202 of one clamping frame 2 and the channel steel 202 of another clamping frame 2 are arranged back to back and clamp the upper yoke and the lower yoke of the iron core body 1; the screw tensioning assembly includes a screw 3 and a nut 4, four screws 3 are provided, and the four screws 3 respectively penetrate the corresponding channel steels 202 at the four corners of the clamping mechanism and are fastened with nuts 4;

[0027] It also includes a positioning ring 5 and an L-shaped latch assembly, the positioning ring 5 is arranged between the nut 4 and the channel steel 202, and the screw 3 coaxially passes through the positioning ring 5; a limiting structure is used between the positioning ring 5 and the channel steel 202 to prevent the positioning ring 5 from rotating; a first plug hole 501 is provided on one side of the positioning ring 5, and an elastic telescopic end for inserting into the first plug hole 501 is provided at one end of the L-shaped latch assembly, a second plug hole 401 is provided on the side around the nut 4, and an elastic telescopic end for inserting into the second plug hole 401 is also provided at the other end of the L-shaped latch assembly.

[0028] Specifically, in the prior art, the nut 4 can rotate on the screw 3 due to vibration; in the utility model, the limiting structure prevents the positioning ring 5 from rotating and one end of the L-shaped plug assembly is limited by the first plug hole 501, so the L-shaped plug assembly has a degree of freedom to rotate around the axis of the first plug hole 501 and a degree of freedom to translate along the axis of the first plug hole 501; furthermore, the other end of the L-shaped plug assembly is plugged into the second plug hole 401, and the two interfere with each other, so the L-shaped plug assembly loses the degree of freedom to translate along the axis of the first plug hole 501 and the degree of freedom to rotate around the axis of the first plug hole 501, and the nut 4 cannot rotate at the same time, that is, the nut 4 and the L-shaped plug assembly restrict each other. In summary, the limiting structure prevents the positioning ring 5 from rotating, the positioning ring 5 limits the L-shaped plug assembly, the L-shaped plug assembly and the nut 4 restrict each other, so the nut 4 cannot loosen, so that the distance between the two nuts 4 on each screw 3 will not change, the spacing between the two clamping frames 2 will remain unchanged, and the transformer core formed by stacking silicon steel sheets will not loosen.

[0029] The L-shaped bolt assembly includes an L-shaped rod 6, a cylindrical bolt 7 and a compression spring 8. The L-shaped rod 6 is formed by bending a round rod. Both ends of the L-shaped rod 6 are provided with cylindrical blind holes, and each blind hole is provided with a cylindrical bolt 7. The cylindrical bolt 7 is slidably matched with the blind hole. The compression spring 8 is coaxially arranged in the blind hole. One end of the compression spring 8 is against the inner end of the cylindrical bolt 7, and the other end of the compression spring 8 is against the bottom wall of the blind hole. The outer end of one cylindrical bolt 7 is plugged into the first plug hole 501, and the outer end of the other cylindrical bolt 7 is plugged into the second plug hole 401. The positioning ring 5 is provided with a plurality of first plug holes 501, and the plurality of first plug holes 501 are evenly distributed around the circumference. Specifically, if none of the first plug holes 501 is aligned with the second plug hole 401 after the nut 4 is tightened into place, the nut 4 is fine-tuned so that the cylindrical bolt 7 is inserted into the first plug hole 501.

[0030] The two ends of the L-shaped rod 6 are respectively provided with a strip sliding hole 601 connected to the blind hole, and the strip sliding hole 601 is opened along the axial direction of the blind hole; the inner end of the cylindrical plug 7 is provided with a fixing rod 701, and the fixing rod 701 protrudes from the strip sliding hole 601, and the fixing rod 701 slides with the strip sliding hole 601. Specifically, the cylindrical plug 7 can overcome the elastic force of the compression spring 8 and shrink into the blind hole by manually operating the fixing rod 701; during maintenance, the L-shaped plug assembly needs to be removed before the nut 4 can be screwed, and one cylindrical plug 7 is first retracted into the blind hole, so that it is disengaged from the first plug hole 501, and then the other cylindrical plug 7 is pulled out of the second plug hole 401, and the disassembly of the L-shaped plug assembly is completed. The fixing rod 701 is limited by the strip sliding hole 601, and then the cylindrical plug 7 is limited and cannot fall out of the blind hole, so that the various components of the L-shaped plug assembly are not easy to be lost.

[0031] One end of the nut 4 is provided with a skirt 402, and a circular through hole matching the cylindrical plug 7 is formed on the skirt 402, and the circular through hole corresponds to the position of the second plug hole 401, and the outer end of a cylindrical plug 7 passes through the circular through hole and plugs into the first plug hole 501. Specifically, the skirt 402 is limited by a cylindrical plug 7, thereby further restricting the nut 4, and enhancing the mutual restriction effect between the L-shaped plug assembly and the nut 4.

[0032] The limiting structure includes two positioning holes 502 spaced apart on one side of the positioning ring 5 and two positioning pins 201 spaced apart and fixed on one side of the channel steel 202. The positioning pins 201 correspond to and are plugged into the positioning holes 502. Specifically, the positioning ring 5 is clamped by the positioning pins 201 on the channel steel 202 through the positioning holes 502, thereby limiting the rotation of the positioning ring 5.

[0033] The utility model discloses a working principle of an anti-loosening transformer core: in the prior art, the nut 4 can rotate on the screw rod 3 due to vibration; in the utility model, the limiting structure prevents the positioning ring 5 from rotating and one end of the L-shaped latch assembly is limited by the first plug hole 501, so the L-shaped latch assembly has a degree of freedom to rotate around the axis of the first plug hole 501 and a degree of freedom to translate along the axis of the first plug hole 501; furthermore, the other end of the L-shaped latch assembly is plugged into the second plug hole 401, and the two interfere with each other, so the L-shaped latch assembly loses the degree of freedom to translate along the axis of the first plug hole 501 and the degree of freedom to rotate around the axis of the first plug hole 501, and the nut 4 cannot rotate at the same time, that is, the nut 4 and the L-shaped latch assembly restrict each other. In summary, the limiting structure prevents the positioning ring 5 from rotating, the positioning ring 5 limits the L-shaped latch assembly, the L-shaped latch assembly and the nut 4 are mutually constrained, and the nut 4 cannot be loosened, so that the distance between the two nuts 4 on each screw rod 3 will not change, and the spacing between the two clamping frames 2 remains unchanged, so the transformer core formed by stacking silicon steel sheets will not loosen.

[0034] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other, and the embodiments can be combined with each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0035] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A transformer core that prevents loosening, characterized in that: The invention comprises an iron core body (1) formed by stacking a plurality of silicon steel sheets and a clamping mechanism for clamping the iron core body (1), wherein the clamping mechanism comprises a clamping frame (2) and a screw tensioning assembly, wherein two clamping frames (2) are symmetrically arranged on both sides of the iron core body (1), and the two clamping frames (2) are tightened by the screw tensioning assembly; the clamping frame (2) is in the form of a regular quadrilateral frame, and comprises two upper and lower channel steels (202) and two left and right channel steels for welding and connecting the upper and lower channel steels. The support rods (203) of the two lower channel steels (202), the channel steel (202) of one clamping frame (2) and the channel steel (202) of another clamping frame (2) are arranged back to back and clamp the upper yoke and the lower yoke of the core body (1); the screw tensioning assembly comprises a screw (3) and a nut (4), the screw (3) is provided with four, the four screws (3) respectively penetrate the corresponding channel steels (202) at the four corners of the clamping mechanism and are fastened with the nuts (4); It also includes a positioning ring (5) and an L-shaped latch assembly, wherein the positioning ring (5) is arranged between the nut (4) and the channel steel (202), and the screw rod (3) coaxially passes through the positioning ring (5); a limiting structure is provided between the positioning ring (5) and the channel steel (202) to prevent the positioning ring (5) from rotating; a first plug hole (501) is provided on one side of the positioning ring (5), and an elastic telescopic end for inserting into the first plug hole (501) is provided at one end of the L-shaped latch assembly; a second plug hole (401) is provided on the circumferential side of the nut (4), and the elastic telescopic end for inserting into the second plug hole (401) is also provided at the other end of the L-shaped latch assembly.

2. The anti-loosening transformer core according to claim 1, characterized in that: The L-shaped latch assembly comprises an L-shaped rod (6), a cylindrical latch (7) and a compression spring (8). The L-shaped rod (6) is formed by bending a round rod. Both ends of the L-shaped rod (6) are provided with cylindrical blind holes, and each of the blind holes is provided with a cylindrical latch (7). The cylindrical latch (7) is slidably matched with the blind hole. The compression spring (8) is coaxially arranged in the blind hole. One end of the compression spring (8) abuts against the inner end of the cylindrical latch (7), and the other end of the compression spring (8) abuts against the bottom wall of the blind hole. The outer end of one cylindrical latch (7) is plugged into the first plug hole (501), and the outer end of another cylindrical latch (7) is plugged into the second plug hole (401). The positioning ring (5) is provided with a plurality of the first plug holes (501), and the plurality of the first plug holes (501) are evenly distributed around the circumference.

3. The anti-loosening transformer core according to claim 2, characterized in that: The two ends of the L-shaped rod (6) are respectively provided with a strip-shaped sliding hole (601) connected to the blind hole, and the strip-shaped sliding hole (601) is opened along the axial direction of the blind hole; the inner end of the cylindrical latch (7) is provided with a fixing rod (701), the fixing rod (701) protrudes out of the strip-shaped sliding hole (601), and the fixing rod (701) is slidably matched with the strip-shaped sliding hole (601).

4. The anti-loosening transformer core according to claim 2 or 3, characterized in that: A skirt (402) is provided at one end of the nut (4), and a circular through hole matching the cylindrical plug (7) is opened on the skirt (402), and the circular through hole corresponds to the position of the second plug hole (401), and an outer end of the cylindrical plug (7) passes through the circular through hole and is plugged into the first plug hole (501).

5. The anti-loosening transformer core according to claim 1, characterized in that: The limiting structure comprises two positioning holes (502) spaced apart on one side of the positioning ring (5) and two positioning pins (201) spaced apart and fixed on one side of the channel steel (202); the positioning pins (201) correspond to and are plugged into the positioning holes (502) one by one.

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