Slide rail tension spring

Abstract

The utility model belongs to the technical field of tension springs, and particularly relates to a slide rail tension spring which comprises a tension spring body and a connecting ring, the tension spring body is in a spiral shape with the diameter increasing in sequence, the surface of the tension spring body is sleeved with a cloth sleeve, the two ends of the tension spring body are integrally provided with straight barrel sections, connecting grooves are formed in the ends of the straight barrel sections, and the connecting ring is connected with the connecting ring. A threaded groove is formed in the connecting groove, and one end of the connecting ring is fixedly connected with a connecting column. Compared with a traditional tension spring, the tension spring is more uniform in stress due to the unique reducing structure, the diameter increasing rate is adjusted according to the overall length, the service life is effectively prolonged, the tension spring adapts to frequent adjustment of an automobile seat, the cloth cover is made of chinlon spandex blended fabric, friction can be reduced, dust and sundries are prevented from invading, and the performance of the tension spring is kept stable. The fine thread connection structure is matched with the 60-degree thread angle, connection is stable and reliable, looseness is prevented, the reliability, stability and comfort of the automobile seat sliding rail system are integrally improved, and potential safety hazards are reduced.

Description

Technical Field

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

[0002] In the automotive manufacturing industry, slide rails and tension springs play a crucial yet often overlooked role. With the booming development of the automotive industry and the increasing demands of consumers for automotive comfort and functionality, the slide rail systems upon which various moving parts inside the car rely are constantly evolving, which places higher demands on the slide rail and tension spring technology.

[0003] Early car seat rail springs mostly used a basic design of equal-diameter cylindrical coil springs, with their ends simply bent to form hooks for secure connection to the seat and rails. In the past, when car rides were relatively smooth and seat adjustments were infrequent, this traditional spring could maintain basic operation. However, modern car usage scenarios are becoming increasingly complex.

[0004] On the one hand, with the increasing demand for long-distance driving, frequent seat adjustments have become the norm. Traditional equal-diameter tension springs, during repeated stretching and contraction, are prone to stress concentration in localized areas of the spring wire due to uneven force distribution. This accelerates spring fatigue, shortens service life, and may even lead to sudden failure during driving, posing a safety hazard to drivers and passengers.

[0005] On the other hand, the trend towards more refined car interiors is becoming increasingly apparent, and consumers have extremely high demands for noise control within the vehicle. Traditional tension springs, due to direct friction with surrounding components during seat sliding, easily produce a harsh "creaking" sound, severely impacting the quiet atmosphere inside the car and reducing ride comfort. Furthermore, ordinary tension springs lack effective dustproof design, allowing dust, debris, and other impurities from inside the car to easily penetrate the springs, causing them to become stuck over time, affecting the smoothness of seat adjustments and significantly diminishing the driving and riding experience.

[0006] Furthermore, as a means of transportation operating in various complex environments, automobiles face numerous challenges, including large temperature variations, fluctuating humidity, road dust, and salt corrosion (especially when driving near the coast). Traditional spring steel tension springs have limited corrosion resistance and temperature variation resistance, making them unsuitable for such harsh environmental conditions. They are prone to rusting and changes in elastic modulus, further affecting the reliability and stability of the slide rail system.

[0007] To address these challenges, automotive parts manufacturers and engineers have been continuously exploring innovations and are committed to developing new types of slide rail springs that are specifically designed for the automotive environment, possessing high reliability, low noise, and strong adaptability, thus paving the way for the innovative design of automotive slide rail springs involved in this patent. Utility Model Content

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this utility model provides a slide rail tension spring, which solves the problems mentioned in the background section.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0012] A slide rail tension spring includes a tension spring body and a connecting ring. The tension spring body is a spiral shape with a diameter that increases sequentially. A cloth sleeve is fitted onto the surface of the tension spring body. A straight cylindrical section is integrally formed at both ends of the tension spring body. A connecting groove is formed inside the end of the straight cylindrical section. A threaded groove is formed inside the connecting groove. A connecting post is fixedly connected to one end of the connecting ring. The connecting post has threaded protrusions. The tension spring body and the connecting ring are fixed by the threaded protrusions on the connecting post connecting to the threaded groove on the connecting groove.

[0013] Furthermore, the connecting groove has a certain depth, and the connecting ring is threadedly connected to the tension spring body in a vertical or horizontal state.

[0014] Furthermore, both the threaded protrusions and the threaded grooves are fine-pitch threads with a thread profile angle of 60°, in order to improve the reliability and stability of the connection between the tension spring body and the connecting ring and prevent loosening during use.

[0015] Furthermore, the tension spring body is made of spring steel.

[0016] Furthermore, the increase in the diameter of the tension spring body varies linearly along its axial direction, and the diameter increase rate is adjusted according to the overall length, so that the tension spring is subjected to more uniform force during the stretching process, effectively improving the service life of the tension spring.

[0017] Furthermore, the cover is made of nylon-spandex blended fabric, and the inner diameter of the cover is adapted to the outer diameter of the tension spring body. The cover is tightly fitted onto the surface of the tension spring body to reduce friction between the tension spring body and external objects, and to prevent dust and debris from entering the helical gap of the tension spring body.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a slide rail tension spring, which has the following beneficial effects:

[0020] Compared to traditional tension springs, this invention features a unique variable diameter structure that ensures more even force distribution. The diameter increase rate is adjusted according to the overall length, effectively extending service life and adapting to frequent adjustments of car seats. The cover is made of a nylon-spandex blend, reducing friction, preventing dust and debris intrusion, and maintaining stable tension spring performance. The fine-threaded connection structure, combined with a 60° thread angle, ensures a secure and reliable connection, preventing loosening. Overall, this design improves the reliability, stability, and comfort of the car seat slide rail system while reducing safety hazards. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the tension spring body structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the connecting ring structure of this utility model;

[0024] Figure 4 This is a schematic diagram of another structural state in which the tension spring body and the connecting ring of this utility model are connected.

[0025] In the diagram: 1. Tension spring body; 2. Cloth sleeve; 3. Straight section; 4. Connecting groove; 5. Threaded groove; 6. Connecting ring; 7. Connecting post; 8. Threaded protrusion. Detailed Implementation

[0026] 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.

[0027] Example

[0028] like Figure 1-4 As shown, an embodiment of the present invention provides a slide rail tension spring, which includes a tension spring body 1 and a connecting ring 6;

[0029] The tension spring body 1 is in the shape of a spiral with the diameter increasing sequentially, and the proportion of the diameter increase changes linearly along its axial direction.

[0030] Compared to traditional equal-diameter tension springs, this structure allows for more even stress distribution during tensioning. By adjusting the diameter increase rate according to the overall length, stress is effectively dispersed, preventing stress concentration in a localized area, thereby extending the lifespan of the tension spring and better adapting to the stress changes caused by frequent adjustments to car seats.

[0031] The cover 2 is made of nylon-spandex blended fabric, and its inner diameter is adapted to the outer diameter of the tension spring body 1, and it is tightly fitted onto the surface of the tension spring body 1.

[0032] Nylon-spandex blended fabric has wear-resistant and elastic properties. On the one hand, it reduces friction between the tension spring body 1 and external objects, thus reducing the wear of the tension spring; on the other hand, it effectively prevents dust and debris from entering the helical gap of the tension spring body 1, avoiding the impact of impurity accumulation on the elasticity and normal operation of the tension spring, and maintaining the stability of the tension spring performance.

[0033] The two ends of the spring body 1 are integrally formed with a straight section 3.

[0034] It provides a stable mounting base for the connecting groove 4, ensuring the structural stability of the connecting groove 4, making the connection between the tension spring body 1 and the connecting ring 6 more reliable, and also helps to position and fix the tension spring during installation and use.

[0035] The connecting groove 4 and the threaded groove 5 are provided inside the end of the straight section 3. The connecting groove 4 has a certain depth.

[0036] The connecting groove 4 provides installation space for the connecting post 7. The threaded groove 5 engages with the threaded protrusion 8 on the connecting post 7 to achieve a threaded connection between the tension spring body 1 and the connecting ring 6. The deeper connecting groove 4 can increase the screw-in depth of the connecting post 7, improve the stability of the connection, and ensure that the tension spring will not easily detach from the connecting parts during operation.

[0037] The connecting ring 6, the connecting post 7, and the threaded groove 8 are provided. One end of the connecting ring 6 is fixedly connected to the connecting post 7, and the connecting post 7 is provided with the threaded groove 8. Both the threaded groove 8 and the threaded groove 5 are fine threads with a thread angle of 60°.

[0038] The connecting ring 6 is used to connect with other components of the automotive seat slide rail system, allowing the tension spring to be installed into the entire slide rail system and function. The connecting post 7 and its threaded protrusions 8 fit tightly with the threaded grooves 5 in the connecting groove 4. The design of fine threads and a 60° thread angle increases the friction and contact area of ​​the threaded connection, improving the reliability and stability of the connection between the tension spring body 1 and the connecting ring 6, and preventing loosening during use.

[0039] This type of sliding rail spring used in automobiles operates based on the elastic deformation characteristics of a spring. When the car seat or other connecting components need to be adjusted, the spring body 1 is subjected to tension. Because the spring body 1 employs a helical structure with progressively increasing diameters at a linear ratio along the axial direction, this special design allows the tension to be distributed more evenly across the spring during tensioning, preventing stress concentration. The nylon-spandex blended fabric sleeve 2 covering the surface of the spring body 1 reduces friction between the spring body 1 and external objects, while preventing dust and debris from entering the helical gaps and ensuring the spring's normal elastic performance. The straight cylindrical sections 3 at both ends of the spring body 1 have connecting grooves 4. The threaded grooves 5 inside the connecting grooves 4 tightly engage with the threaded protrusions 8 on the connecting post 7 at one end of the connecting ring 6. This threaded connection method stably connects the spring body 1 to other components of the seat sliding rail system. When the tension is removed, the tension spring body 1 relies on its own elastic restoring force to drive the connected parts back to the initial position or assist their movement, thereby realizing the assist and return function in the seat position adjustment process. In addition, the threaded connection structure between the connecting ring 6 and the tension spring body 1 can ensure that the tension spring maintains a stable connection during repeated stress and will not easily loosen.

[0040] like Figure 2 As shown, in some embodiments, both the threaded protrusion 8 and the threaded groove 5 are fine threads with a thread profile angle of 60°, in order to improve the reliability and stability of the connection between the tension spring body 1 and the connecting ring 6 and prevent loosening during use.

[0041] like Figure 2 As shown, in some embodiments, the tension spring body 1 is made of spring steel; spring steel, as a type of steel specifically used for manufacturing elastic elements, has irreplaceable advantages. Chemically, it mainly contains elements such as carbon and manganese, with small amounts of silicon, chromium, and phosphorus added. Carbon is the key component, giving the steel good plasticity and elasticity, while manganese and silicon enhance the steel's strength and hardness, and chromium and phosphorus improve its wear resistance and corrosion resistance.

[0042] In terms of performance, spring steel possesses excellent elastic modulus, yield strength, and tensile strength. Its good toughness and fatigue strength ensure that the tension spring body 1 is not prone to plastic deformation or fracture even under repeated tensile stress. During frequent adjustments of car seats, the tension spring body 1 is constantly subjected to tensile and rebound forces. These characteristics of spring steel ensure that the tension spring can work stably and reliably, maintain a long service life, and effectively avoid tension spring failure due to material issues, providing a solid guarantee for smooth adjustment of car seats. Moreover, spring steel also has excellent heat treatability. Through appropriate heat treatment processes, its internal structure can be further optimized, the material's performance potential can be explored, and the tension spring body 1 can better adapt to the complex operating environment of automobiles.

[0043] like Figure 4 As shown, in some embodiments, the diameter increase rate of the tension spring body 1 varies linearly along its axial direction. The diameter increase rate is adjusted according to the overall length, making the tension spring more evenly stressed during tensioning and effectively improving its service life. Adjusting the diameter increase rate according to the overall length of the tension spring is to adapt to the stress characteristics of tension springs of different lengths. Longer tension springs, when stretched, have a longer force transmission distance and are more prone to uneven stress distribution; therefore, a larger diameter increase rate is needed to ensure uniform stress distribution. Shorter tension springs, on the other hand, have relatively concentrated force transmission, and a smaller diameter increase rate is sufficient to meet the requirement of uniform stress distribution. This design, which adjusts the diameter increase rate according to the overall length, allows the tension spring to achieve optimal stress conditions for various length specifications, further improving the applicability and reliability of the tension spring.

[0044] like Figure 1 As shown, in some embodiments, the cover 2 is made of a nylon-spandex blend fabric. The inner diameter of the cover 2 is adapted to the outer diameter of the tension spring body 1. The cover 2 is tightly fitted onto the surface of the tension spring body 1 to reduce friction between the tension spring body 1 and external objects, and to prevent dust and debris from entering the helical gaps of the tension spring body 1. The nylon-spandex blend fabric combines the excellent properties of nylon and spandex. Nylon has excellent abrasion resistance, several times that of cotton, which can effectively resist the wear caused by frequent friction between the tension spring and external objects during operation, greatly extending the service life of the cover 2, thereby protecting the tension spring body 1 and preventing the tension spring from being directly exposed to friction due to premature wear of the cover 2. Spandex gives the fabric high elasticity, allowing the cover 2 to fit tightly against the tension spring body 1. Even if the shape of the tension spring changes during stretching and contraction, the cover 2 can always maintain a good wrapping state, without loosening or shifting, and continue to play a protective role.

[0045] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slide rail tension spring, comprising a spring body (1) and a connecting ring (6), characterized in that: The tension spring body (1) is a spiral shape with a diameter that increases sequentially. A cloth sleeve (2) is fitted onto the surface of the tension spring body (1). A straight cylindrical section (3) is integrally formed at both ends of the tension spring body (1). A connecting groove (4) is provided inside the end of the straight cylindrical section (3). A threaded groove (5) is provided inside the connecting groove (4). A connecting post (7) is fixedly connected to one end of the connecting ring (6). A threaded protrusion (8) is provided on the connecting post (7). The tension spring body (1) and the connecting ring (6) are fixed by connecting the threaded protrusion (8) on the connecting post (7) to the threaded groove (5) on the connecting groove (4).

2. The slide rail tension spring according to claim 1, characterized in that: The connecting groove (4) has a certain depth, and the connecting ring (6) is threadedly connected to the tension spring body (1) in a vertical or horizontal state.

3. A slide rail tension spring according to claim 1, characterized in that: Both the threaded protrusion (8) and the threaded groove (5) are fine threads with a thread profile angle of 60°, in order to improve the reliability and stability of the connection between the tension spring body (1) and the connecting ring (6) and prevent loosening during use.

4. A slide rail tension spring according to claim 1, characterized in that: The tension spring body (1) is made of spring steel.

5. A slide rail tension spring according to claim 1, characterized in that: The diameter of the tension spring body (1) increases linearly along its axial direction. The diameter increase rate is adjusted according to the overall length, so that the tension spring is subjected to more uniform force during the stretching process, which effectively improves the service life of the tension spring.

6. A slide rail tension spring according to claim 1, characterized in that: The cover (2) is made of nylon-spandex blended fabric. The inner diameter of the cover (2) is adapted to the outer diameter of the tension spring body (1). The cover (2) is tightly fitted onto the surface of the tension spring body (1) to reduce friction between the tension spring body (1) and external objects, and to prevent dust and debris from entering the helical gap of the tension spring body (1).

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