Wire threading jig for high-voltage fuse

Abstract

A wire penetrating jig for a high-voltage fuse comprises a wire penetrating body, the wire penetrating body is sequentially divided into an upper wire penetrating seat and a lower wire penetrating seat from top to bottom, the upper wire penetrating seat and the lower wire penetrating seat are in mirror symmetry, the upper wire penetrating seat comprises a fuse wire positioning part and a limiting step, and the limiting step is arranged on the fuse wire positioning part. A plurality of fuse positioning grooves which are transversely arranged at intervals and are used for fixing fuses are formed in the fuse positioning part, the two ends of each fuse positioning groove are open, the limiting steps are arranged on the two sides of the fuse positioning part in a mirror symmetry mode, and sawtooth line parts used for fixing copper pipes are arranged on the limiting steps. According to the utility model, by arranging the fuse wire positioning groove for fixing the fuse wire and the limiting step for limiting the red copper pipe, the positions of the fuse wire and the red copper pipe are prevented from deviating, and the stability is high, so that the effective lengths of the fuse wires of all products are equal and consistent, and the product performance is consistent; and the sawtooth line part is arranged on the limiting step, so that the fuse wire and the red copper tube are tightly attached, the contact is good, the length is equal, and the close attachment is realized, thereby ensuring the consistent resistance of each product, and improving the qualified rate of the product.

Description

Technical Field

[0001] This utility model relates to the field of fuse manufacturing technology, and in particular to a wire threading fixture for high-voltage fuses. Background Technology

[0002] A fuse, also known as a circuit breaker, is an electrical component installed in a circuit to ensure its safe operation. The IEC 127 standard defines it as a "fuse-link." A fuse melts and breaks the circuit when the current abnormally rises to a certain level or temperature, thus protecting the circuit and significantly enhancing safety. High-voltage fuses are specifically designed to protect circuits from overload and short-circuit damage, especially in high-voltage power systems.

[0003] The crimping and assembly process of high-voltage fuses is one of the most important steps in assembling high-voltage fuses. The traditional crimping and assembly method involves manually comparing the effective distance of the fuse wire, inserting a copper tube into the fuse, and then using a standard planar crimping method for assembly. This method has the following drawbacks: manually comparing the effective distance of the fuse wire cannot be consistently accurate, and production efficiency is low, failing to meet the demands of rapid production; because the hardness of the fuse wire and the copper tube differs significantly (copper has better ductility but the fuse wire is harder), planar crimping can easily lead to localized poor connections or stress concentrations, resulting in poor contact and unstable product resistance, thus reducing the yield rate.

[0004] Therefore, how to provide a wire-threading fixture for high-voltage fuses is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a wire threading fixture for high-voltage fuses, aiming to solve the aforementioned technical problems. This invention prevents the fuse and copper tube from shifting positions by setting a fuse positioning groove to fix the fuse and a limiting step to limit the copper tube, resulting in high stability and ensuring that the effective length of the fuse in each product is equal and consistent, thus ensuring consistent product performance. Furthermore, the limiting step is provided with a serrated texture to ensure that the fuse and copper tube fit tightly and make good contact. The equal length and tight fit ensure that the resistance of each product is consistent, greatly improving the pass rate.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A high-voltage fuse threading fixture includes a threading body, which is divided into an upper threading seat and a lower threading seat from top to bottom. The upper and lower threading seats are mirror-symmetrical. The upper threading seat includes a fuse positioning part and a limiting step. The fuse positioning part has a plurality of fuse positioning grooves arranged laterally at intervals for fixing the fuse. The two ends of the fuse positioning grooves are open. The limiting step is mirror-symmetrically arranged on both sides of the fuse positioning part. The vertical height of the limiting step is less than the vertical height of the fuse positioning part. The limiting step has a serrated pattern for fixing a copper tube.

[0008] Furthermore, the serrated texture portion includes a plurality of spaced-apart limiting recesses and a plurality of spaced-apart limiting protrusions, with the plurality of limiting recesses and limiting protrusions being arranged alternately.

[0009] Furthermore, the limiting recess forms a strip-shaped groove with a semi-circular cross-section, and the limiting protrusion forms a protruding strip with a semi-circular cross-section.

[0010] Furthermore, the serrated texture portion also includes an inner protrusion and an outer protrusion. The inner protrusion is located between the fuse positioning portion and the limiting recess. One end of the outer protrusion is connected to one of the limiting recesses. The limiting recess, the limiting protrusion, the inner protrusion, the outer protrusion and the fuse positioning portion are integrally formed.

[0011] Furthermore, a limiting insertion hole is provided inside the limiting step. The limiting insertion hole is in the shape of a "7" and includes a horizontal part and a vertical part.

[0012] Furthermore, the fuse positioning part is also provided with a snap-fit ​​groove, which is located on one side of the fuse positioning groove, and the snap-fit ​​groove and the transverse part are located on the same transverse horizontal plane.

[0013] Furthermore, the fuse positioning part is also provided with an abutment groove, which is located between the snap-fit ​​groove and the fuse positioning groove, and the width of the abutment groove is greater than the width of the fuse positioning groove.

[0014] Furthermore, the wire threading body is provided with an assembly hole, which extends from the upper wire threading seat to the lower wire threading seat, and the upper end of the assembly hole is located in the abutment groove.

[0015] Furthermore, the two outer sides of the fuse positioning part are provided with inclined portions, and the corners of the limiting step are provided with oblique cut portions.

[0016] Furthermore, a snap-fit ​​recess is provided between the upper threading seat and the lower threading seat.

[0017] This utility model of a high-voltage fuse threading fixture has the following beneficial effects:

[0018] This utility model relates to a high-voltage fuse threading fixture. It employs a specialized threading fixture with a fuse positioning groove for fixing the fuse and a limiting step for limiting the copper tube, preventing misalignment between the fuse and the copper tube. This ensures high stability and guarantees that the effective length of the fuse is uniform for each product, resulting in consistent product performance. Compared to manually aligning the effective distance of the fuse, this utility model significantly improves production efficiency. Furthermore, the serrated pattern on the limiting step, combined with the pressure head of the press, ensures a tight fit and good contact between the fuse and the copper tube. This uniform length and tight fit guarantee consistent resistance for each product, greatly improving the pass rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the high-voltage fuse threading fixture of this utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of the high-voltage fuse threading fixture of this utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the overall structure of the high-voltage fuse threading fixture of this utility model. Figure 3 ;

[0022] Figure 4 for Figure 1 The diagram shows the structure at point A.

[0023] The labels shown in the diagram are:

[0024] 1. Upper thread holder; 2. Lower thread holder; 3. Fuse positioning part; 4. Limiting step; 5. Fuse positioning groove; 6. Serrated part; 7. Limiting recess; 8. Limiting protrusion; 9. Inner protrusion; 10. Outer protrusion; 11. Limiting insertion hole; 12. Horizontal part; 13. Vertical part; 14. Snap-fit ​​groove; 15. Abutment groove; 16. Assembly through hole; 17. Inclined part; 18. Beveled part; 19. Snap-fit ​​recess. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the product of this utility model will be further described in detail below with reference to the embodiments and accompanying drawings.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] like Figure 1 and Figure 2 As shown, a high-voltage fuse threading fixture includes a threading body, which is divided into an upper threading seat 1 and a lower threading seat 2 from top to bottom. The upper threading seat 1 and the lower threading seat 2 are mirror-symmetrical. The upper threading seat 1 includes a fuse positioning part 3 and a limiting step 4. The fuse positioning part 3 has several fuse positioning grooves 5 arranged laterally at intervals for fixing the fuse. The two ends of the fuse positioning grooves 5 are open. The limiting steps 4 are mirror-symmetrically arranged on both sides of the fuse positioning part 3. The vertical height of the limiting steps 4 is less than the vertical height of the fuse positioning part 3. The limiting steps 4 have serrated texture parts 6 for fixing copper tubes. The length and width of each fuse positioning groove 5 are the same.

[0029] It should be noted that this utility model, by providing a fuse positioning groove 5 and a limiting step 4 for the limiting copper tube, can prevent the position of the fuse and the copper tube from changing, and has good limiting and fixing performance.

[0030] like Figure 3 As shown, the serrated texture portion 6 includes a plurality of spaced-apart limiting recesses 7 and a plurality of spaced-apart limiting protrusions 8, with the plurality of limiting recesses 7 and limiting protrusions 8 being arranged alternately.

[0031] It should be noted that the combination of the limiting step 4 and the fuse positioning groove 5 can also be used for fuse length gauge, that is, to measure or control the fuse length, and can also further measure or control the fuse length, thereby ensuring that the effective fuse length of each product is equal and consistent, and the product performance is consistent. Compared with manually comparing the effective distance of the fuse, this utility model greatly improves production efficiency.

[0032] It should be further explained that this utility model is used in conjunction with a press, which is equipped with a special pressure head with the same texture as the serrated part 6. Under the pressure of the pressing, the concave and convex structure of the serrated part 6 embeds into the surface of the copper tube, forming a physical anchor point. This effectively resists axial displacement or rotational loosening of the fuse. Compared to traditional smooth contact that relies solely on friction, the serrated design of this utility model significantly improves pull-out resistance, effectively ensuring a tight fit between the fuse and the copper tube, good contact, and consistent resistance for each product due to equal length and tight fit, greatly improving the pass rate.

[0033] like Figure 3 As shown, the limiting recess 7 forms a strip-shaped groove with a semi-circular cross-section, and the limiting protrusion 8 forms a protrusion with a semi-circular cross-section.

[0034] like Figure 3 As shown, the serrated textured part 6 also includes an inner protrusion 9 and an outer protrusion 10. The inner protrusion 9 is located between the fuse positioning part 3 and the limiting recess 7. One end of the outer protrusion 10 is connected to one of the limiting recesses 7. The limiting recess 7, the limiting protrusion 8, the inner protrusion 9, the outer protrusion 10 and the fuse positioning part 3 are integrally formed.

[0035] like Figure 2 and Figure 4 As shown, a limiting insertion hole 11 is provided in the limiting step 4. The limiting insertion hole 11 is in the shape of a "7" and includes a horizontal part 12 and a vertical part 13. The limiting insertion hole 11 can be used to connect related components of the press.

[0036] It should be noted that the lateral portion 12 passes through the outer protrusion 10 to the second limiting protrusion 8, and the vertical portion 13 is located inside the second limiting protrusion 8. The number of limiting protrusions 8 and limiting recesses 7 in this embodiment can be adjusted according to actual needs, and the positions of the lateral portion 12 and the vertical portion 13 can also be adjusted accordingly according to actual needs.

[0037] like Figure 4 As shown, the fuse positioning part 3 is further provided with a snap-fit ​​groove 14, which is located on one side of the fuse positioning groove 5, and the snap-fit ​​groove 14 and the transverse part 12 are located on the same transverse horizontal plane. The snap-fit ​​groove 14 is used to connect other fixing devices, thereby improving the stability of the present invention.

[0038] like Figure 4 As shown, the fuse positioning part 3 is further provided with an abutment groove 15, which is located between the snap-fit ​​groove 14 and the fuse positioning groove 5. The width of the abutment groove 15 is greater than the width of the fuse positioning groove 5. The abutment groove 15 connects to other related devices, improving the stability of the present invention in use.

[0039] As shown in Figure 4, the wire threading body is provided with an assembly hole 16, which extends from the upper wire threading seat 1 to the lower wire threading seat 2, and the upper end of the assembly hole 16 is located in the abutment groove 15. The assembly hole 16 is used to connect other fixing devices, thereby improving the stability of this utility model in use.

[0040] like Figure 4 As shown, the two outer sides of the fuse positioning part 3 are provided with inclined parts 17, and the corners of the limiting step 4 are provided with beveled parts 18. The inclined parts 17 and beveled parts 18 are beneficial to enhancing the safety performance of this utility model. Compared with the design of sharp right angles, this utility model improves the safety during use.

[0041] like Figure 4 As shown, a locking recess 19 is provided between the upper threading seat 1 and the lower threading seat 2. The structures of the upper threading seat 1 and the lower threading seat 2 are the same in this embodiment, so they will not be described in detail here.

[0042] It should be noted that the upper wire seat 1 and the lower wire seat 2 are integrally formed, and the locking recess 19 is used to connect other fixing devices to improve stability. In this embodiment, the fuse material can be tungsten wire, silver wire, copper wire, or tin wire, preferably tungsten wire.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A wire-threading fixture for high-voltage fuses, characterized in that: The device includes a wire threading body, which is divided into an upper wire threading seat (1) and a lower wire threading seat (2) from top to bottom. The upper wire threading seat (1) and the lower wire threading seat (2) are mirror-symmetrical. The upper wire threading seat (1) includes a fuse positioning part (3) and a limiting step (4). The fuse positioning part (3) has several fuse positioning grooves (5) arranged horizontally at intervals for fixing the fuse. The two ends of the fuse positioning grooves (5) are open. The limiting step (4) is mirror-symmetrically arranged on both sides of the fuse positioning part (3). The vertical height of the limiting step (4) is less than the vertical height of the fuse positioning part (3). The limiting step (4) has a serrated pattern part (6) for fixing the copper tube.

2. The high-voltage fuse threading fixture according to claim 1, characterized in that: The sawtooth texture portion (6) includes a plurality of spaced-apart limiting recesses (7) and a plurality of spaced-apart limiting protrusions (8), which are arranged alternately.

3. The high-voltage fuse threading fixture according to claim 2, characterized in that: The limiting recess (7) forms a strip-shaped groove with a semi-circular cross-section, and the limiting protrusion (8) forms a protruding strip with a semi-circular cross-section.

4. The high-voltage fuse threading fixture according to claim 3, characterized in that: The serrated part (6) also includes an inner protrusion (9) and an outer protrusion (10). The inner protrusion (9) is located between the fuse positioning part (3) and the limiting recess (7). One end of the outer protrusion (10) is connected to one of the limiting recesses (7). The limiting recess (7), the limiting protrusion (8), the inner protrusion (9), the outer protrusion (10) and the fuse positioning part (3) are integrally formed.

5. The high-voltage fuse threading fixture according to claim 1, characterized in that: The limiting step (4) has a limiting insertion hole (11) inside. The limiting insertion hole (11) is in the shape of a "7" and includes a horizontal part (12) and a vertical part (13).

6. The high-voltage fuse threading fixture according to claim 1, characterized in that: The fuse positioning part (3) is also provided with a snap-fit ​​groove (14), which is located on one side of the fuse positioning groove (5), and the snap-fit ​​groove (14) and the transverse part (12) are located on the same transverse horizontal plane.

7. The high-voltage fuse threading fixture according to claim 6, characterized in that: The fuse positioning part (3) is also provided with an abutment groove (15), which is located between the snap-fit ​​groove (14) and the fuse positioning groove (5). The width of the abutment groove (15) is greater than the width of the fuse positioning groove (5).

8. The high-voltage fuse threading fixture according to claim 7, characterized in that: The wire threading body is provided with an assembly hole (16), which extends from the upper wire threading seat (1) to the lower wire threading seat (2), and the upper end of the assembly hole (16) is located in the abutment groove (15).

9. The high-voltage fuse threading fixture according to claim 1, characterized in that: The fuse positioning part (3) has inclined parts (17) on both outer sides, and the corner of the limiting step (4) has oblique cuts (18).

10. The high-voltage fuse threading fixture according to claim 1, characterized in that: A snap-fit ​​recess (19) is provided between the upper threading seat (1) and the lower threading seat (2).

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