Tension spring

Abstract

The utility model relates to the technical field of tension springs, and discloses a tension spring which comprises a torsion spring, first fixing rings are fixedly installed at the two ends of the torsion spring, and the hanging end of a limiting mechanism is arranged at one end of the torsion spring. The bolt at one end of the second fixing block is in threaded connection with the interior of the threaded groove, installation of the limiting mechanisms can be completed, the two limiting mechanisms are hung on an external connecting piece needing to be connected, the torsion spring can be used, and meanwhile the arc-shaped block in the installation groove and anti-skid stripes on the surface of the arc-shaped block are not prone to falling off. The friction force between the hook and a connecting part can be increased, the connecting part is prevented from slipping under the action of tension, normal work of the tension spring is ensured, when the hook is damaged, the hook can be replaced by screwing out the bolt from the interior of the threaded groove, the friction force between the hook and the connecting part is increased, and meanwhile the hook is replaced. And the hook part can be independently replaced, so that the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tension spring technology, specifically a tension spring. Background Technology

[0002] A tension spring, also known as a range spring or extension spring, is a helical spring that withstands axial tensile force. It is typically made of a round cross-section material. When unloaded, the coils of a tension spring are tightly packed together without gaps. This design allows it to absorb and store energy when stretched, generating a counterforce that attempts to pull the stretched ends back to their original position.

[0003] Traditional hooks are usually smooth metal structures with low friction between the hook and the connector. Under repeated stretching or vibration, they are prone to relative slippage or even detachment, which can lead to spring failure or safety hazards. Furthermore, long-term friction between the hook and the connector can cause wear on the hook surface, especially in areas of stress concentration. After prolonged use, the hook may break. Since current technology cannot replace the hook individually, the entire hook needs to be replaced when it breaks, resulting in relatively high usage costs. Utility Model Content

[0004] The purpose of this utility model is to provide a tension spring that solves the problem that traditional hooks are usually smooth metal structures with low friction between them and the connecting parts. Under repeated stretching or vibration, they are prone to relative slippage or even disengagement, leading to spring failure or safety hazards. Furthermore, long-term friction between the hook and the connecting parts causes the hook surface to wear easily, especially in areas of stress concentration, which may lead to breakage after prolonged use. Since existing technology cannot replace the hook individually, the entire hook needs to be replaced when it breaks, resulting in relatively high usage costs.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a tension spring, including a torsion spring. Both ends of the torsion spring are fixedly installed with a first fixing ring. The first fixing ring has a threaded groove inside. A limit mechanism is installed inside the threaded groove. The hook end of the limit mechanism is located at one end of the torsion spring.

[0007] Furthermore, the limiting mechanism includes a mounting groove inside the hook, and a second fixing block is fixedly installed at one end of the hook;

[0008] Furthermore, a bolt is fixedly installed at one end of the second fixing block, and the bolt is threaded into the inside of the thread groove;

[0009] Furthermore, an arc-shaped block is fixedly installed inside the mounting groove;

[0010] Furthermore, the outer surface of the arc-shaped block is provided with several anti-slip stripes;

[0011] The installation of the limiting mechanism is completed by threading the bolt at one end of the second fixing block into the threaded groove. The two limiting mechanisms can then be attached to the external connectors that need to be connected to use the torsion spring. At the same time, the arc-shaped block in the mounting groove and the anti-slip stripes on its surface can increase the friction between the connecting parts and prevent the connecting parts from slipping under tension, ensuring the normal operation of the tension spring. When the hook is damaged, the bolt can be unscrewed from the threaded groove to replace the hook. This not only increases the friction between the hook and the connecting parts but also allows for the individual replacement of the hook, reducing the cost of use.

[0012] Furthermore, a wear-resistant sleeve is fitted onto the outer surface of the torsion spring;

[0013] Wear-resistant sleeves can reduce friction between torsion springs and external objects during use, thus extending their service life.

[0014] This utility model has the following beneficial effects:

[0015] (1) The bolt at one end of the second fixing block is threaded into the inside of the thread groove to complete the installation of the limiting mechanism. The two limiting mechanisms can be hung on the external connecting parts that need to be connected to use the torsion spring. At the same time, the arc-shaped block in the mounting groove and the anti-slip stripes on its surface can increase the friction between the connecting parts and prevent the connecting parts from slipping under the action of tension, ensuring the normal operation of the tension spring. When the hook is damaged, the bolt can be unscrewed from the inside of the thread groove to replace the hook. This increases the friction between the connecting parts and allows the hook to be replaced separately, reducing the cost of use.

[0016] (2) The wear-resistant sleeve of this utility model can reduce the friction between the torsion spring and external objects during use and extend its service life.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram showing the overall structure of this utility model disassembled;

[0021] Figure 3 This utility model Figure 3 Enlarged schematic diagram of structure A in the image;

[0022] Figure 4 This is a schematic cross-sectional view of the torsion spring structure of this utility model;

[0023] The attached diagram lists the components represented by each number as follows:

[0024] In the diagram: 1. Torsion spring; 101. Wear-resistant sleeve; 2. First fixing ring; 201. Threaded groove; 3. Limiting mechanism; 301. Hook; 302. Mounting groove; 303. Second fixing block; 304. Bolt; 305. Arc-shaped block; 306. Anti-slip stripes. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 As shown, this utility model is a tension spring, including a torsion spring 1. Both ends of the torsion spring 1 are fixedly installed with a first fixing ring 2. The first fixing ring 2 is provided with a threaded groove 201 inside. The threaded groove 201 is installed with a limit mechanism 3 inside. The hook end of the limit mechanism 3 is set at one end of the torsion spring 1.

[0027] The limiting mechanism 3 includes a hook 301 with an internal mounting groove 302, and a second fixing block 303 is fixedly installed at one end of the hook 301;

[0028] A bolt 304 is fixedly installed at one end of the second fixing block 303, and the bolt 304 is threaded into the inside of the threaded groove 201.

[0029] An arc-shaped block 305 is fixedly installed inside the mounting slot 302;

[0030] The outer surface of the arc-shaped block 305 is provided with several anti-slip stripes 306;

[0031] By threading the bolt 304 at one end of the second fixing block 303 into the inside of the threaded groove 201, the installation of the limiting mechanism 3 can be completed. The two limiting mechanisms 3 can be hooked onto the external connecting parts that need to be connected to use the torsion spring 1. At the same time, the arc-shaped block 305 in the mounting groove 302 and the anti-slip stripes 306 on its surface can increase the friction between the connecting parts and prevent the connecting parts from slipping under the action of tension, ensuring the normal operation of the tension spring. When the hook 301 is damaged, the bolt 304 can be unscrewed from the inside of the threaded groove 201 to replace the hook 301. This increases the friction between the connecting parts and allows the hook 301 to be replaced separately, reducing the cost of use.

[0032] A wear-resistant sleeve 101 is fitted onto the outer surface of the torsion spring 1;

[0033] The wear-resistant sleeve 101 can reduce the friction between the torsion spring 1 and external objects during use, thus extending its service life.

[0034] In use, first thread the bolt 304 at one end of the second fixing block 303 into the inside of the threaded groove 201 to complete the installation of the limiting mechanism 3. Then, hang the two limiting mechanisms 3 on the external connecting parts that need to be connected to use the torsion spring 1. At the same time, the arc-shaped block 305 in the mounting groove 302 and the anti-slip stripes 306 on its surface can increase the friction between the connecting parts and prevent the connecting parts from slipping under the action of tension, ensuring the normal operation of the tension spring. When the hook 301 is damaged, the bolt 304 can be unscrewed from the inside of the threaded groove 201 to replace the hook 301. This increases the friction between the connecting parts and allows the hook 301 to be replaced separately, reducing the cost of use.

[0035] The wear-resistant sleeve 101 can reduce the friction between the torsion spring 1 and external objects during use, thus extending its service life.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A tension spring, comprising a torsion spring (1), characterized in that: Both ends of the torsion spring (1) are fixedly installed with a first fixing ring (2). The first fixing ring (2) has a threaded groove (201) inside. The threaded groove (201) is installed with a limit mechanism (3) inside. The hook end of the limit mechanism (3) is set at one end of the torsion spring (1).

2. A tension spring according to claim 1, characterized in that: The limiting mechanism (3) includes a hook (301) with an internal mounting groove (302) and a second fixing block (303) fixedly installed at one end of the hook (301).

3. A tension spring according to claim 2, characterized in that: One end of the second fixing block (303) is fixedly installed with a bolt (304), and the bolt (304) is threaded into the inside of the threaded groove (201).

4. A tension spring according to claim 2, characterized in that: An arc-shaped block (305) is fixedly installed inside the mounting groove (302).

5. A tension spring according to claim 4, characterized in that: The outer surface of the arc-shaped block (305) is provided with several anti-slip stripes (306).

6. A tension spring according to claim 1, characterized in that: The outer surface of the torsion spring (1) is fitted with a wear-resistant sleeve (101).

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