Adjustable pre-tightening force U-shaped metal spring

Abstract

The utility model discloses a kind of U-shaped metal spring pieces of adjustable pre-tightening force, including U-shaped body, adjusting mechanism and anti-loosening assembly, the U-shaped body is made of two symmetrically arranged leg and the connecting part of connecting leg, the free end of the leg forms elastic contact end, the adjusting mechanism includes the screw rod of at least one the leg and the nut of the screw rod screw cooperation, the axis of the screw rod is perpendicular to the extension direction of the leg, and one end of the screw rod is abutted to the inner side surface of the connecting part. By screw rod and nut cooperation can flexibly adjust pre-tightening force, adapt to different working condition demand, solve the limitation of traditional spring piece pre-tightening force fixed;Adjusting knob with anti-slip line, cooperate nut limit plane, convenient operation and prevent skidding, improve adjustment efficiency and stability. The sliding cooperation of guide groove and guide boss ensures that leg deformation is stable, improves pre-tightening force adjustment accuracy.

Description

Technical Field

[0001] This utility model relates to the field of spring technology, specifically a U-shaped metal spring with adjustable preload. Background Technology

[0002] In fields such as machinery manufacturing and electronic equipment, U-shaped metal springs are widely used for connection, clamping, and buffering due to their simple structure and good elasticity. However, most existing U-shaped metal springs are one-piece structures, with their preload fixed after manufacturing. This makes them unadjustable according to actual working conditions, difficult to adapt to different assembly gaps or load requirements, and limits their applicability. Furthermore, traditional springs are prone to preload attenuation or loosening under long-term vibration or impact, affecting connection stability. The lack of a guiding structure during adjustment can easily lead to deformation and misalignment, resulting in insufficient precision. Additionally, some springs suffer from poor wear resistance, inconvenient operation, and short service life due to material properties or structural design defects, failing to meet the requirements of high precision and high reliability. Therefore, there is an urgent need for a U-shaped metal spring that offers flexible preload adjustment, high stability, and durability. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a U-shaped metal spring with adjustable preload, which can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An adjustable preload U-shaped metal spring includes a U-shaped body, an adjustment mechanism, and an anti-loosening component. The U-shaped body consists of two symmetrically arranged legs and a connecting part connecting the legs. The free ends of the legs form elastic contact ends.

[0006] The adjustment mechanism includes a screw that passes through at least one of the legs and a nut that is threadedly engaged with the screw. The axis of the screw is perpendicular to the extension direction of the leg, and one end of the screw abuts against the inner surface of the connecting part.

[0007] The anti-loosening component includes an elastic washer sleeved on the screw, the elastic washer being located between the nut and the outer surface of the leg.

[0008] As a further description of the above technical solution, the inner surface of the leg is provided with a guide groove extending along its length direction, and the inner surface of the connecting part is provided with a guide boss corresponding to the guide groove, and the guide boss slides in conjunction with the guide groove.

[0009] As a further description of the above technical solution, the other end of the screw is provided with an adjustment knob, and the outer peripheral surface of the adjustment knob is provided with anti-slip texture.

[0010] As a further description of the above technical solution, the free end of the leg is provided with an arc-shaped contact surface, and the radius of curvature of the arc-shaped contact surface is 2-3 times the thickness of the leg.

[0011] As a further description of the above technical solution, the outer surface of the connecting part is provided with a mounting hole, the axis of which is perpendicular to and intersects the axis of the screw.

[0012] As a further description of the above technical solution, the outer peripheral surface of the nut is provided with a limiting plane that fits against the outer surface of the leg.

[0013] As a further description of the above technical solution, the elastic washer is a disc spring washer, and its thickness is 1 / 3 to 1 / 2 of the thickness of the nut.

[0014] As a further description of the above technical solution, the material of the leg is spring steel, and the surface of the leg is provided with a nitriding layer, the thickness of which is 0.02-0.05mm.

[0015] As a further description of the above technical solution, a buffer pad is provided between the inner surface of the connecting part and the abutting end of the screw.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The U-shaped metal spring sheet with adjustable preload of this utility model has at least one of the following beneficial effects during use:

[0018] The preload can be flexibly adjusted via the screw and nut, adapting to different working conditions and overcoming the limitations of traditional spring-loaded preload fixing. The adjusting knob features anti-slip texture and works in conjunction with the nut's limiting plane, ensuring convenient operation and preventing slippage, thus improving adjustment efficiency and stability. The sliding fit between the guide groove and guide boss ensures smooth leg deformation and improves preload adjustment accuracy. The disc spring washer provides continuous elastic pressure, effectively preventing loosening and ensuring long-term stability of the preload. The arc-shaped contact surface disperses pressure, preventing damage to the connected parts; the mounting hole design facilitates fixing and improves installation stability; the spring steel material and nitriding layer enhance elasticity and wear resistance, while the buffer pad reduces component wear, significantly extending service life and reducing maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a U-shaped metal spring sheet with adjustable preload according to the present invention;

[0020] Figure 2 This is a schematic diagram of the first side structure of a U-shaped metal spring sheet with adjustable preload according to the present invention;

[0021] Figure 3 This is a schematic diagram of the second side structure of a U-shaped metal spring sheet with adjustable preload according to the present invention;

[0022] Figure 4 This is a schematic diagram of the third side structure of a U-shaped metal spring sheet with adjustable preload according to the present invention;

[0023] Figure 5 This is a partial perspective view of the U-shaped metal spring sheet with adjustable preload according to the present invention.

[0024] Numbering on the map:

[0025] 1. U-shaped body; 101. Leg; 102. Connecting part; 103. Elastic contact end; 104. Guide groove; 105. Guide boss; 106. Mounting hole; 107. Nitriding layer; 2. Adjustment mechanism; 201. Screw; 202. Nut; 203. Elastic washer; 204. Adjustment knob; 3. Anti-loosening component; 301. Buffer pad. 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] like Figure 1-5 As shown, this utility model provides a U-shaped metal spring with adjustable preload, including a U-shaped body 1, an adjustment mechanism 2 and an anti-loosening component 3. The U-shaped body 1 is composed of two symmetrically arranged legs 101 and a connecting part 102 connecting the legs 101. The free end of the legs 101 forms an elastic contact end 103.

[0028] When adjusting the preload, the operator can rotate the screw 201 using the adjusting knob 204 with anti-slip texture on the other end. Since the nut 202 is threaded onto the screw 201, and the limiting plane on the outer circumference of the nut 202 is in contact with the outer surface of the leg 101, slippage of the nut 202 during rotation is effectively prevented, allowing the screw 201 to move along its own axis. One end of the screw 201 abuts against the inner surface of the connecting part 102. As the screw 201 moves, it generates a thrust on the connecting part 102, causing displacement of the connecting part 102.

[0029] During this process, the guide groove 104 on the inner surface of the leg 101 and the guide boss 105 on the inner surface of the connecting part 102 slide together, which guides the deformation of the leg 101, ensuring that the leg 101 can deform smoothly and orderly, avoiding deviation, thereby accurately changing the preload of the elastic contact end 103 of the free end of the leg 101.

[0030] The adjustment mechanism 2 includes a screw 201 that passes through at least one of the legs 101 and a nut 202 that is threadedly engaged with the screw 201. The axis of the screw 201 is perpendicular to the extension direction of the leg 101, and one end of the screw 201 abuts against the inner surface of the connecting part 102.

[0031] The anti-loosening component 3 includes an elastic washer 203 sleeved on the screw 201, and the elastic washer 203 is located between the nut 202 and the outer surface of the leg 101.

[0032] In this embodiment, when the spring clip is in operation, the elastic washer 203 (disc spring washer) in the anti-loosening component 3 is located between the nut 202 and the outer surface of the leg 101. It generates continuous elastic pressure, tightly pressing the nut 202, effectively preventing the nut 202 from loosening due to vibration and other factors, and ensuring the stability of the preload. At the same time, the arc-shaped contact surface of the free end of the leg 101 contacts the connected part, which can disperse the pressure and avoid excessive local stress. The mounting hole 106 on the outer surface of the connecting part 102 can be used to install and fix the spring clip in the corresponding position. The axis of the mounting hole 106 is perpendicular to and intersects the axis of the screw 201, ensuring the stability of the installation. The leg 101 is made of spring steel and has a nitrided layer 107 on its surface, which enhances the elasticity and wear resistance of the leg 101 and ensures that it can maintain good performance during repeated deformation. The buffer pad 301 between the inner surface of the connecting part 102 and the abutting end of the screw 201 can reduce the wear and impact between the two.

[0033] Furthermore, the inner surface of the leg 101 is provided with a guide groove 104 extending along its length, and the inner surface of the connecting part 102 is provided with a guide boss 105 corresponding to the guide groove 104. The guide boss 105 is slidably engaged with the guide groove 104. The slidable engagement between the guide groove 104 on the inner side of the leg 101 and the guide boss 105 on the inner side of the connecting part 102 provides a good guiding effect on the deformation of the leg 101 when adjusting the preload, making the deformation of the leg 101 smooth and improving the accuracy of preload adjustment.

[0034] Furthermore, the other end of the screw 201 is equipped with an adjustment knob 204, the outer circumferential surface of which is provided with anti-slip texture. Through the cooperation of the screw 201 and nut 202 of the adjustment mechanism 2, the preload of the elastic contact end 103 can be precisely adjusted, meeting different preload requirements under different working conditions and greatly improving the applicability of the spring. The adjustment knob 204 at the other end of the screw 201 and the anti-slip texture on its outer circumferential surface facilitate operator rotation of the screw 201 to adjust the preload, reducing operational difficulty and improving adjustment efficiency.

[0035] Furthermore, the free end of the leg 101 is provided with an arc-shaped contact surface, the radius of curvature of which is 2-3 times the thickness of the leg 101. The arc-shaped contact surface at the free end of the leg 101 can make closer contact with the connected component, disperse pressure, avoid damage to the connected component, and also extend the service life of the spring and the connected component.

[0036] Furthermore, the outer surface of the connecting part 102 is provided with a mounting hole 106, the axis of which is perpendicular to and intersects the axis of the screw 201. The mounting hole 106 of the connecting part 102 facilitates the installation and fixing of the spring piece, and the setting of the mounting hole 106 ensures the stability of the installation and improves the installation efficiency.

[0037] Furthermore, the outer circumferential surface of the nut 202 is provided with a limiting plane that fits against the outer surface of the leg 101. The fitting of the limiting plane on the outer circumferential surface of the nut 202 with the outer surface of the leg 101 increases the friction between the two, preventing the nut 202 from slipping during adjustment and operation, and enhancing the stability of the structure.

[0038] Furthermore, the elastic washer 203 is a disc spring washer, and its thickness is 1 / 3 to 1 / 2 of the thickness of the nut 202. The elastic washer 203 (disc spring washer) of the anti-loosening component 3 can effectively prevent the nut 202 from loosening, ensure that the preload remains stable during the operation of the spring, improve the reliability of the spring operation, and reduce failures caused by changes in preload.

[0039] Furthermore, the leg 101 is made of spring steel, and its surface is provided with a nitrided layer 107, the thickness of which is 0.02-0.05 mm. The leg 101, made of spring steel, possesses good elasticity and toughness. The nitrided layer 107 on its surface improves its wear resistance and corrosion resistance, extending the service life of the spring clip.

[0040] Furthermore, a buffer pad 301 is provided between the inner surface of the connecting part 102 and the abutting end of the screw 201. The buffer pad 301 between the inner surface of the connecting part 102 and the abutting end of the screw 201 reduces direct friction and impact between the two, reduces the wear of the components, and thus reduces the number of maintenance times and costs.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A U-shaped metal spring with adjustable preload, characterized in that: It includes a U-shaped body, an adjustment mechanism, and an anti-loosening component. The U-shaped body consists of two symmetrically arranged legs and a connecting part connecting the legs. The free ends of the legs form elastic contact ends. The adjustment mechanism includes a screw that passes through at least one of the legs and a nut that is threadedly engaged with the screw. The axis of the screw is perpendicular to the extension direction of the leg, and one end of the screw abuts against the inner surface of the connecting part. The anti-loosening component includes an elastic washer sleeved on the screw, the elastic washer being located between the nut and the outer surface of the leg.

2. The U-shaped metal spring with adjustable preload according to claim 1, characterized in that: The inner surface of the leg is provided with a guide groove extending along its length, and the inner surface of the connecting part is provided with a guide boss corresponding to the guide groove, and the guide boss slides in conjunction with the guide groove.

3. The U-shaped metal spring with adjustable preload according to claim 1, characterized in that: The other end of the screw is provided with an adjustment knob, and the outer circumferential surface of the adjustment knob is provided with anti-slip texture.

4. The U-shaped metal spring with adjustable preload according to claim 1, characterized in that: The free end of the leg is provided with an arc-shaped contact surface, and the radius of curvature of the arc-shaped contact surface is 2-3 times the thickness of the leg.

5. The U-shaped metal spring with adjustable preload according to claim 1, characterized in that: The outer surface of the connecting part is provided with a mounting hole, the axis of which is perpendicular to and intersects the axis of the screw.

6. The U-shaped metal spring with adjustable preload according to claim 1, characterized in that: The outer circumferential surface of the nut is provided with a limiting plane that fits against the outer surface of the leg.

7. The U-shaped metal spring with adjustable preload according to claim 1, characterized in that: The elastic washer is a disc spring washer, and its thickness is 1 / 3 to 1 / 2 of the thickness of the nut.

8. The U-shaped metal spring with adjustable preload according to claim 1, characterized in that: The leg is made of spring steel, and the surface of the leg is provided with a nitrided layer with a thickness of 0.02-0.05 mm.

9. The U-shaped metal spring with adjustable preload according to claim 1, characterized in that: A buffer pad is provided between the inner surface of the connecting part and the abutting end of the screw.

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