Spring with mechanical overload protection mechanism
By introducing a mechanical overload protection mechanism into the spring and utilizing limit and speed limiting mechanisms, the problem of excessive force or speed during the spring's stretching process is solved, thus achieving effective protection for the spring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU JULI SPRING MFG CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-12
AI Technical Summary
Existing springs lack overload protection mechanisms during the stretching process, making them prone to deformation or breakage due to excessive force.
设计了一种具有机械式过载保护机构的弹簧，包括套筒、固定环、移动环、缓冲装置和防过载装置，通过限位和限速机制防止弹簧过度拉伸和速度过快。
This effectively prevents the spring from being subjected to excessive force or speed after being stretched to a certain length, thus avoiding deformation and breakage and protecting the spring.
Smart Images
Figure CN224229143U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spring technology, specifically a spring with a mechanical overload protection mechanism. Background Technology
[0002] A spring is a mechanical part that works by utilizing elasticity. A part made of elastic material deforms under external force and returns to its original shape after the force is removed; this is called a spring. 。
[0003] Existing springs are generally subjected to frequent stretching during use, and they do not have a protective structure during the stretching process. Sometimes, they may be subjected to excessive force, stretch too much and deform, or break due to excessive tension on the surface. There is a lack of an overload protection mechanism. In view of this, a spring with a mechanical overload protection mechanism is proposed. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a spring with a mechanical overload protection mechanism, which has the advantages of overload protection for spring stretching and limiting the spring stretching speed, thus solving the problem of spring breaking due to excessive force caused by excessive stretching during use.
[0006] (II) Technical Solution
[0007] To achieve the above-mentioned purpose of overload protection for spring tension and limiting spring tension speed, the present invention provides the following technical solution: a spring with a mechanical overload protection mechanism, including a sleeve, a fixed ring sleeved at both ends of the outer surface of the sleeve, a limit ring fixedly connected at both ends of the inner wall of the sleeve, and a movable ring slidably sleeved at both ends of the outer surface of the sleeve, and a buffer device provided on both movable rings (3).
[0008] An overload protection device is installed between the two buffer devices;
[0009] Preferably, the overload protection device includes four first fixed rods, which are fixedly installed at equal intervals on the surface of the moving ring near the fixed ring, and a disc is fixedly connected to the end of the four first fixed rods away from the moving ring.
[0010] Preferably, a fixing rod is fixedly connected to the upper surface of the disk, and the fixing rod is slidably sleeved on the inner surface of the sleeve;
[0011] The upper end of the fixing rod is fixedly connected to the first piston, which is slidably sleeved on the inner surface of the sleeve.
[0012] Preferably, a spring is fixedly connected to the upper surface of the first piston, and a second piston is fixedly connected to the upper surface of the spring, with the second piston slidably sleeved on the inner surface of the sleeve.
[0013] Preferably, the overload protection device includes two fixed blocks, which are respectively installed on the corresponding ends of the two second pistons. The corresponding ends of the two fixed blocks are rotatably connected to two support rods, and the corresponding ends of the two support rods are rotatably connected to two sliders.
[0014] Preferably, a second fixing rod is slidably sleeved on the inner surface of the two sliders, and the second fixing rod is fixedly installed on the inner wall of the sleeve.
[0015] Preferably, the two buffer devices have identical structures and are arranged in a mirror image.
[0016] (III) Beneficial Effects
[0017] Compared with the prior art, this utility model provides a spring with a mechanical overload protection mechanism, which has the following advantages:
[0018] 1. The spring with a mechanical overload protection mechanism, when the disc is subjected to a downward pulling force, applies a downward pulling force to the fixed rod fixedly connected to the upper surface after the disc is subjected to the force. The fixed rod applies a downward pulling force to the first piston fixedly connected to the upper surface. The first piston applies a downward pulling force to the spring fixedly connected to the upper surface, causing it to expand. At the same time as the spring expands, the disc drives the first fixed rod fixedly connected to the upper surface to move. Simultaneously, the first fixed rod drives the moving ring fixedly connected to the upper end to slide downward on the outer surface of the sleeve. At this time, the moving ring slides to the fixed ring, and the fixed ring limits the moving ring to prevent it from continuing to move downward. At the same time, the fixed rod stops moving downward, and the spring stops expanding, thus forming overload protection. The spring with this mechanical overload protection mechanism can limit the spring after it is stretched to a certain length to prevent it from being stretched too long and causing excessive force, thus effectively protecting the spring.
[0019] 2. In this spring with a mechanical overload protection mechanism, when the spring is stretched, the spring drives the second piston fixedly connected to the upper surface to move downward. The second piston drives the fixed block fixedly connected to the upper surface to move downward. The fixed block drives the two support rods rotatably connected to the upper surface to move downward. While moving downward, the two support rods gradually become vertical and move towards the opposite surface. At this time, the two support rods drive the two sliders rotatably connected to the upper end to move towards the opposite surface. In this way, the speed of the second piston's downward movement can be limited by this movement to prevent the spring from being stretched too fast and thus breaking. The spring with this mechanical overload protection mechanism can limit the speed of the spring while it is being stretched to prevent it from being stretched too fast, thus preventing deformation and damage. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of a spring structure with a mechanical overload protection mechanism according to the present invention.
[0021] Figure 2 This is a schematic diagram of the internal structure of the sleeve of this utility model;
[0022] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.
[0023] In the diagram: 1. Sleeve; 2. Fixed ring; 3. Moving ring; 4. First fixed rod; 5. Disc; 6. Fixed rod; 7. Limiting ring; 8. First piston; 9. Spring; 10. Second piston; 11. Fixed block; 12. Support rod; 13. Sliding block; 14. Second fixed rod. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.
[0025] Please see Figure 1-3 This utility model provides a new technical solution: a spring with a mechanical overload protection mechanism, including a sleeve 1, with fixed rings 2 fixedly installed on both ends of the outer surface of the sleeve 1, and limit rings 7 fixedly connected to both ends of the inner wall of the sleeve 1. Moving rings 3 are slidably sleeved on both ends of the outer surface of the sleeve 1, and buffer devices are provided on both moving rings 3. An overload protection device is provided between the two buffer devices.
[0026] Furthermore, the overload protection device includes four first fixed rods 4, which are equidistantly fixed on the surface of the moving ring 3 near the fixed ring 2. A disc 5 is fixedly connected to the end of each of the four first fixed rods 4 away from the moving ring 3. A fixed rod 6 is fixedly connected to the upper surface of the disc 5, and the fixed rod 6 is slidably sleeved on the inner surface of the sleeve 1. A first piston 8 is fixedly connected to the upper end of the fixed rod 6, and the first piston 8 is slidably sleeved on the inner surface of the sleeve 1. A spring 9 is fixedly connected to the upper surface of the first piston 8, and a second piston 10 is fixedly connected to the upper surface of the spring 9, and the second piston 10 is slidably sleeved on the inner surface of the sleeve 1. The two buffer devices have identical structures and are arranged in a mirror image. When the spring with the mechanical overload protection mechanism is in use, when the disc 5 is subjected to a downward pulling force, the disc 5, after being subjected to force, will... The fixed rod 6 applies a downward pulling force, which in turn applies a downward pulling force to the first piston 8 fixedly connected to the upper surface. The first piston 8 applies a downward pulling force to the spring 9 fixedly connected to the upper surface, causing it to expand. As the spring 9 expands, the disc 5 drives the first fixed rod 4 fixedly connected to the upper surface to move. At the same time, the first fixed rod 4 drives the moving ring 3 fixedly connected to the upper end to slide downward on the outer surface of the sleeve 1. At this time, the moving ring 3 slides to the fixed ring 2, and the fixed ring 2 limits the moving ring to prevent it from continuing to move downward. Meanwhile, the fixed rod 6 stops moving downward, and the spring 9 stops expanding, forming a buffer. This spring with a mechanical overload protection mechanism can limit the spring after it is stretched to a certain length, preventing it from being stretched too long and causing excessive force, thus effectively protecting the spring.
[0027] Furthermore, the overload protection device includes two fixed blocks 11, which are respectively fixedly installed on the corresponding ends of the two second pistons 10. Each corresponding end of the two fixed blocks 11 is rotatably connected to two support rods 12, and each corresponding end of the support rods 12 is rotatably connected to two sliders 13. The inner surfaces of the two sliders 13 are slidably fitted with second fixing rods 14, which are fixedly installed on the inner wall of the sleeve 1. When this spring with a mechanical overload protection mechanism is in use, as the spring 9 is stretched, the spring 9 drives the second pistons 10 fixedly connected to the upper surface to move downwards, and the second pistons 10 drive the upper surface to move downwards. The fixed block 11, which is fixedly connected to the surface, moves downward. The fixed block 11 drives the two support rods 12, which are rotatably connected to the upper surface, to move downward. As the two support rods 12 move downward, they gradually become vertical and move towards the opposite surface. At this time, the two support rods 12 drive the two sliders 13, which are rotatably connected to the upper end, to move towards the opposite surface. This movement can limit the speed of the second piston 10 when it moves downward, preventing the spring 9 from being stretched too fast and breaking, thus forming overload protection. This mechanical overload protection mechanism can prevent the spring 9 from being stretched too fast, which could lead to deformation and damage, thus forming overload protection.
[0028] Working principle: When the spring with mechanical overload protection mechanism is in use, when the disc 5 is subjected to a downward pulling force, the disc 5 applies a downward pulling force to the fixed rod 6 fixedly connected to the upper surface. The fixed rod 6 applies a downward pulling force to the first piston 8 fixedly connected to the upper surface. The first piston 8 applies a downward pulling force to the spring 9 fixedly connected to the upper surface, causing it to expand. At the same time as the spring 9 expands, the disc 5 drives the first fixed rod 4 fixedly connected to the upper surface to move. Simultaneously, the first fixed rod 4 drives the moving ring 3 fixedly connected to the upper end to slide downward on the outer surface of the sleeve 1. At this time, the moving ring 3 slides to the fixed ring 2, and the fixed ring 2 limits the moving ring to prevent it from continuing to move downward. At the same time, the fixed rod 6 stops moving downward, and the spring 9 stops expanding, forming overload protection. While the spring 9 is being stretched, the spring 9 drives the second piston 10, which is fixedly connected to the upper surface, to move downward. The second piston 10 drives the fixed block 11, which is fixedly connected to the upper surface, to move downward. The fixed block 11 drives the two support rods 12, which are rotatably connected to the upper surface, to move downward. While moving downward, the two support rods 12 gradually become vertical and move towards the opposite surface. At this time, the two support rods 12 drive the two sliders 13, which are rotatably connected to the upper end, to move towards the opposite surface. In this way, the speed of the second piston 10 moving downward can be limited by this movement, preventing the spring 9 from being stretched too fast and breaking.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A spring with a mechanical overload protection mechanism, comprising a sleeve (1), characterized in that: Fixed rings (2) are fixedly installed on both ends of the outer surface of the sleeve (1), and limit rings (7) are fixedly connected to both ends of the inner wall of the sleeve (1). Moving rings (3) are slidably installed on both ends of the outer surface of the sleeve (1), and buffer devices are provided on both moving rings (3). An overload protection device is installed between the two buffer devices.
2. A spring with a mechanical overload protection mechanism according to claim 1, characterized in that: The buffer device includes four first fixed rods (4), which are fixedly installed at equal distances on the surface of the moving ring (3) near the fixed ring (2), and a disc (5) is fixedly connected to the end of the four first fixed rods (4) away from the moving ring (3).
3. A spring with a mechanical overload protection mechanism according to claim 2, characterized in that: A fixing rod (6) is fixedly connected to the upper surface of the disk (5), and the fixing rod (6) is slidably sleeved on the inner surface of the sleeve (1); The upper end of the fixing rod (6) is fixedly connected to the first piston (8), which is slidably sleeved on the inner surface of the sleeve (1).
4. A spring with a mechanical overload protection mechanism according to claim 3, characterized in that: A spring (9) is fixedly connected to the upper surface of the first piston (8), and a second piston (10) is fixedly connected to the upper surface of the spring (9). The second piston (10) is slidably sleeved on the inner surface of the sleeve (1).
5. A spring with a mechanical overload protection mechanism according to claim 4, characterized in that: The overload protection device includes two fixed blocks (11), which are respectively fixedly installed on the corresponding ends of the two second pistons (10). The corresponding ends of the two fixed blocks (11) are rotatably connected to two support rods (12), and the corresponding ends of the two support rods (12) are rotatably connected to two sliders (13).
6. A spring with a mechanical overload protection mechanism according to claim 5, characterized in that: The inner surfaces of the two sliders (13) are slidably fitted with the second fixing rod (14), which is fixedly installed on the inner wall of the sleeve (1).
7. A spring with a mechanical overload protection mechanism according to claim 1, characterized in that: The two buffer devices have the same structure and are arranged in a mirror image.