A fuse shockproof and loosening preventing clip

Abstract

The utility model relates to high pressure current -limiting fuse technical field, and disclose a kind of anti-vibration, anti-loose clip for fuse, the anti-vibration, anti-loose clip for fuse, including contact card, hoop, wiring terminal, fixed bolt, the contact card is U-shaped, the upper portion of the contact card is bent into the arc shape that can be closely attached to PT fuse outer cap, the lower portion of the contact card is equipped with mounting hole in both sides, limit slot is set on the contact card, the groove bottom of the limit slot is lower than the both sides surface of the contact card, the hoop is n-shaped, the lower end both sides end of the hoop is bent inward and forms installation part;The utility model is through the cooperation of hoop and limit slot, the axial location of semicircular limit block, realize anti-vibration and anti-loose;Red copper material guarantees that conduction is stable, installation is convenient, adapts diameter 25.4mm fuse, can replace traditional spring steel clip, avoid the loosening discharge accident caused by vibration.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage current-limiting fuse technology, specifically to a shockproof and anti-loosening clip for a fuse. Background Technology

[0002] Voltage transformers, as a common type of electrical equipment for voltage conversion, are widely used in power generation, transmission, transformation, industrial and civil fields in China. Fuse, which protects voltage transformers, plays a crucial role.

[0003] Currently, most fuses used for voltage transformer protection are 25.4mm in diameter. These fuses are traditionally secured with spring steel clamps. Due to their small size, the clamping force of the spring steel is limited, which is restrictive and does not provide shock or prevent loosening. In special operating environments, vibration may cause the fuse clamps to loosen, resulting in discharge and potentially serious consequences. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a shockproof and anti-loosening clip for fuses. It solves the problem that traditional fuse clips, which use spring steel for clamping, are limited in strength due to the small size of the product. This method is not shockproof or anti-loosening, and in special operating environments, vibration may cause the fuse clip to loosen, resulting in discharge and serious consequences.

[0005] This utility model provides the following technical solution: a shockproof and anti-loosening clip for a fuse, comprising a contact clip, a clamp, a terminal block, and a fixing bolt. The contact clip is U-shaped, with its upper part bent into an arc shape that can fit tightly against the outer cap of a PT fuse. Mounting holes are provided on both sides of the lower part of the contact clip. A limiting groove is provided on the contact clip, with the bottom of the limiting groove lower than the two side surfaces of the contact clip. The clamp is n-shaped, with its lower two ends bent inward to form a mounting part. The mounting part passes through the mounting hole in the lower part of the contact clip and its end is flattened.

[0006] The clamp can be engaged with the limiting groove. The terminal block is connected to the bottom of the contact clip via a fixing bolt. A flat washer and a spring washer are fitted on the lower part of the fixing bolt, and a nut is threaded onto the lower part of the fixing bolt.

[0007] Preferred technical solution 1: The contact card is made of copper strip.

[0008] The copper strip in this design is used to ensure reliable electrical conductivity between the contact clip and the fuse cap.

[0009] Preferred technical solution 2: The hoop is made of steel wire.

[0010] Preferred technical solution 3: Two semi-circular limiting blocks are provided on one side of the contact card.

[0011] Preferred technical solution four: The material of the wiring terminal is copper.

[0012] In this design, copper is used to match the conductivity of the contact card, ensuring reliable overall conductivity of the card.

[0013] Compared with the prior art, this utility model provides a shockproof and anti-loosening clip for fuses, which has the following beneficial effects:

[0014] (1) The fuse uses anti-vibration and anti-loosening clips. Through the cooperation of the n-shaped clamp and the limiting groove, the clamp has no space for independent displacement after being locked. The semi-circular limiting block restricts the axial movement of the fuse. The dual structure ensures that the fuse does not loosen or fall off in the vibration environment.

[0015] (2) The fuse uses shockproof and anti-loosening clips. The contact clips and terminals are made of copper. The upper arc surface of the contact clip fits tightly with the fuse cap, reducing contact resistance and ensuring reliable current transmission. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 1. Contact clip; 2. Hoop; 3. Terminal block; 4. Fixing bolt; 5. Nut; 6. Flat washer; 7. Spring washer; 8. Limit groove; 9. Limit block. Detailed Implementation

[0019] Please see Figure 1-2 ,

[0020] Example 1: A shockproof and anti-loosening clip for a fuse includes a contact clip 1, a clamp 2, a terminal block 3, and a fixing bolt 4. The contact clip 1 is U-shaped, and the upper part of the contact clip 1 is bent into an arc shape that can fit tightly against the outer cap of the PT fuse. Mounting holes are provided on both sides of the lower part of the contact clip 1. A limiting groove 8 is provided on the contact clip 1. The bottom of the limiting groove 8 is lower than the two side surfaces of the contact clip 1. The clamp 2 is n-shaped, and the lower two sides of the clamp 2 are bent inward to form a mounting part. The mounting part passes through the mounting hole at the lower part of the contact clip 1 and the end is flattened.

[0021] The clamp 2 can be engaged with the limiting groove 8. The terminal block 3 is connected to the bottom of the contact clip 1 through the fixing bolt 4. The lower part of the fixing bolt 4 is fitted with a flat washer 6 and a spring washer 7. The lower part of the fixing bolt 4 is threaded with a nut 5.

[0022] Example 2: The difference between this example and Example 1 is that the contact card 1 is made of copper strip.

[0023] Example 3: The difference between this example and Example 1 is that the hoop 2 is made of steel wire.

[0024] Example 4: The difference between this example and Example 1 is that two semi-circular limiting blocks 9 are provided on one side of the contact card 1.

[0025] Example 5: The difference between this example and Example 1 is that the material of the terminal block 3 is copper.

[0026] In summary, this fuse uses anti-vibration and anti-loosening clips. During use, first loosen the clamp 2 on the clip, moving it away from the locking position on the contact clip 1. Insert the fuse into the contact clip 1 from the end without the limit block 9. The limit block prevents the fuse from moving axially, especially when the fuse is installed vertically, preventing vibration during operation from causing the fuse to shift and fall. Then, use a tool to lock the clamp 2 into the limit groove 8 of the contact clip. The limit groove 8 itself is lower than the sides, and after the clamp 2 is locked, it cannot move without the use of external force.

Claims

1. A shockproof and anti-loosening clip for a fuse, comprising a contact clip (1), a clamp (2), a terminal block (3), and a fixing bolt (4), characterized in that: The contact clip (1) is U-shaped, and the upper part of the contact clip (1) is bent into an arc shape that can fit tightly against the outer cap of the PT fuse. The lower two sides of the contact clip (1) are provided with mounting holes. The contact clip (1) is provided with a limiting groove (8). The bottom of the limiting groove (8) is lower than the two side surfaces of the contact clip (1). The clamp (2) is n-shaped. The lower two sides of the clamp (2) are bent inward to form a mounting part. The mounting part passes through the mounting hole at the lower part of the contact clip (1) and the end is flattened. The clamp (2) can be engaged with the limiting groove (8), the terminal (3) is connected to the bottom of the contact clip (1) by a fixing bolt (4), the lower part of the fixing bolt (4) is fitted with a flat washer (6) and a spring washer (7), and the lower part of the fixing bolt (4) is threaded with a nut (5).

2. The shockproof and anti-loosening clip for a fuse according to claim 1, characterized in that: The contact card (1) is made of copper strip.

3. The anti-vibration and anti-loosening clip for a fuse according to claim 1, characterized in that: The hoop (2) is made of steel wire.

4. The shockproof and anti-loosening clip for a fuse according to claim 1, characterized in that: Two semi-circular limiting blocks (9) are provided on one side of the contact card (1).

5. The shockproof and anti-loosening clip for a fuse according to claim 1, characterized in that: The terminal block (3) is made of copper.

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