A spring screw

Abstract

The utility model discloses a spring screw, including the screw cap, the bottom fixedly connected with fixed link of screw cap, the bottom fixedly connected with threaded rod of fixed link, be equipped with the limit ring groove on the outer edge of fixed link, the support block of active connection has on limit ring groove, the outer wall of support block is located the outside of fixed link, and the gasket of active connection has in fixed link, and the gasket is located the top of support block, and the spring body of having the spring body is covered in fixed link, and the spring body is located between gasket and support block, and one end of spring body and gasket abut, and the other end and support block abut, the utility model will be screwed into the threaded hole of product when threaded rod, the bottom of support block will be in contact with the surface of product to keep the state of relative stillness, and threaded rod drives fixed link, screw cap and gasket to move downward, and spring body is compressed between gasket and support block, and generates the rotation tendency when being pressed, but due to the protection of support block will not scrape product surface, ensure that the surface of product is beautiful and service life.

Description

Technical Field

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

[0002] Spring screws, also known as lock-on screws, are screws that can be riveted to a metal plate and can be freely screwed in and out. The entire component is firmly embedded in the panel and will not come off, hence the name lock-on screw. The outer circumference of the screw usually has straight teeth pressed into it to facilitate hand tightening, hence the name hand-tightening screw or hand-tightening screw.

[0003] Existing patent document "CN217519046U, A Spring Screw" includes: a head with a countersunk groove on its end face; the head and a fixing rod are fixedly connected; the fixing rod and a threaded rod are fixedly connected; a spring is fitted on the fixing rod. In use, the threaded rod is aligned with a threaded hole, and a screwdriver is inserted into the countersunk groove to screw the spring screw in. As the screw is screwed in, the spring begins to rotate with the fixing rod. When the bottom of the spring contacts the equipment, the spring's elastic force is converted into frictional force with the equipment due to compression. This causes relative movement between the spring and the fixing rod as the spring screw is further screwed in, resulting in the spring screw rotating relative to the spring. After the screw is installed, the spring exerts elastic force on the equipment, thus securing the screw and preventing it from loosening due to equipment vibration.

[0004] However, when using this spring screw, the spring is in direct contact with the product surface. During the tightening process, the spring is compressed by the nut, causing it to exert significant pressure on the product surface, damaging it and affecting its lifespan. Furthermore, because the spring tends to rotate under pressure, it can easily rotate relative to the product surface, thus scratching it. Utility Model Content

[0005] The purpose of this invention is to provide a spring screw to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A spring screw includes a nut, a fixing rod fixedly connected to the bottom of the nut, a threaded rod fixedly connected to the bottom of the fixing rod, a limiting annular groove provided on the outer edge of the fixing rod, a support block movably connected to the limiting annular groove, the outer wall of the support block being located outside the fixing rod, a washer movably connected to the fixing rod, the washer being located above the support block, a spring body sleeved on the fixing rod, the spring body being located between the washer and the support block, one end of the spring body abutting against the washer, and the other end abutting against the support block.

[0008] Furthermore, the support block is provided with a U-shaped opening, the two sides of which correspond to the limiting ring groove, for inserting the support block directly into the limiting ring groove.

[0009] Furthermore, the nominal diameter of the threaded rod is smaller than the diameter of the fixed rod, and the inner diameter of the spring body and the diameter of the central hole of the washer are both larger than the diameter of the fixed rod.

[0010] Furthermore, the support block is made of elastic plastic material, and the two sides of the U-shaped opening are symmetrically provided with locking blocks. The two sides of the limiting ring groove are symmetrically provided with slots for corresponding locking blocks to be inserted. The locking blocks and slots are both arranged along the extension direction of the limiting ring groove.

[0011] Furthermore, both the card slot and the card block are right-angled triangular structures, and the inclined surfaces of both the card slot and the card block are oriented towards the opening direction of the U-shaped opening.

[0012] Furthermore, a limiting block is provided on the innermost side of the U-shaped opening, and a limiting groove for inserting the limiting block is provided on the limiting ring groove.

[0013] The beneficial effects of this utility model are:

[0014] When the threaded rod is screwed into the threaded hole of the product, the bottom of the support block contacts the surface of the product, thus maintaining a relatively stationary state. When the nut is further rotated to tighten, the threaded rod drives the fixed rod and the nut to move downwards. The washer moves downwards with the nut, causing the spring body to be compressed between the washer and the support block. During compression, friction causes the spring body to tend to rotate under pressure. However, due to the protection of the support block, the spring body will not scratch the product surface, effectively protecting the surface appearance and service life of the product. At the same time, the height of the limiting ring groove restricts the movement distance of the support block, preventing the spring screw from being over-tightened.

[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] Figure 1 : Overall structural diagram of this utility model.

[0017] Figure 2 : Exploded view of this utility model.

[0018] Figure 3 : Another embodiment of the present invention is shown in the schematic diagram of the support block insertion.

[0019] Figure 4 : Another embodiment of this utility model, a schematic diagram of the support block being pulled out.

[0020] Reference numerals in the attached drawings: 1. Nut; 2. Fixing rod; 3. Threaded rod; 4. Support block; 5. Washer; 6. Spring body; 21. Limiting ring groove; 22. Slot; 23. Limiting groove; 41. U-shaped opening; 42. Slot; 43. Limiting block. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please refer to Figure 1-4 ;

[0023] A spring screw includes a nut 1, a fixing rod 2 fixedly connected to the bottom of the nut 1, and a threaded rod 3 fixedly connected to the bottom of the fixing rod 2. Preferably, the outer circumferential surface of the nut 1 is provided with straight teeth, which can increase the friction when manually tightening the nut 1 by hand or with the aid of tools, thereby facilitating the rotation of the spring screw. A limiting ring groove 21 is provided on the outer edge of the fixing rod 2, and a support block 4 is movably connected to the limiting ring groove 21. The bottom surface of the support block 4 is a smooth plane, and the outer wall of the support block 4 is located outside the fixing rod 2. The support block 4 can slide in the extending direction of the limiting ring groove 21. A washer 5 is movably connected to the fixing rod 2 and is located above the support block 4. A spring body 6 is sleeved on the fixing rod 2 and is located between the washer 5 and the support block 4. One end of the spring body 6 abuts against the washer 5, and the other end abuts against the support block 4.

[0024] When the threaded rod 3 is screwed into the threaded hole of the product, the bottom of the support block 4 will contact the surface of the product, thus maintaining a relatively stationary state. When the nut 1 is continued to be turned to tighten, the threaded rod 3 drives the fixing rod 2 and the nut 1 to move downwards. The washer 5 moves downwards with the nut 1, causing the spring body 6 to be compressed between the washer 5 and the support block 4. During compression, the friction causes the spring body 6 to rotate under pressure. However, due to the protection of the support block 4, the spring body 6 will not scratch the product surface, effectively protecting the surface appearance and service life of the product. At the same time, the height of the limiting ring groove 21 restricts the movement distance of the support block 4, preventing the spring screw from being over-tightened.

[0025] In this embodiment, the support block 4 is provided with a U-shaped opening 41, the two sides of which correspond to the limiting ring groove 21, for inserting the support block 4 directly into the limiting ring groove 21. When the spring screw is turned many times, the spring body 6 will wear down the support block 4. At this time, the support block 4 can be directly pulled out from the limiting ring groove 21 and replaced with a new support block 4 without replacing the entire spring screw, thereby reducing replacement costs.

[0026] Furthermore, the nominal diameter of the threaded rod 3 is smaller than that of the fixed rod 2, while the inner diameter of the spring body 6 and the diameter of the central hole of the washer 5 are both larger than that of the fixed rod 2. This allows both the spring body 6 and the washer 5 to be assembled or disassembled along the axial direction of the fixed rod 2. When the spring body 6 undergoes permanent deformation due to repeated compression or prolonged pressure, the support block 4 can be horizontally pulled out of the limiting ring groove 21 first, and then the spring body 6 can be directly pulled out and replaced. Similarly, when the spring screw is turned many times, the spring body 6 will wear down the washer 5. In this case, after pulling out the support block 4 and the spring body 6, the washer 5 can be removed and replaced along the axial direction of the fixed rod 2. This allows each vulnerable component to be replaced individually, thereby further reducing maintenance costs.

[0027] In another embodiment, the remaining structure remains consistent with the above-described structure, except that: considering that if the spring screw is applied to a product that will vibrate, under long-term vibration, the support block 4 may accidentally fall out of the limiting ring groove 21, a locking block 42 is provided on both sides of the U-shaped opening 41 along the extending direction of the limiting ring groove 21. Correspondingly, a locking groove 22 is provided at a corresponding position on the limiting ring groove 21. When the support block 4 is installed into the limiting ring groove 21, the two locking blocks 42 can be engaged into the corresponding locking grooves 22, thereby realizing the movable engagement between the support block 4 and the limiting ring groove 21. While engaging the support block 4, the support block 4 is still allowed to slide freely along the extending direction of the limiting ring groove 21, ensuring that its normal function is not affected. The support block 4 is made of elastic plastic material, which has good wear resistance and a certain elastic deformation ability. When it needs to be disassembled and replaced, the user can manually open the U-shaped opening 41 of the support block 4 to both sides, so that the two locking blocks 42 can be disengaged from the corresponding locking slots 22, thereby allowing the support block 4 to be pulled out from the limiting ring groove 21. This ensures the stability of the spring screw in the vibration environment, while also taking into account the convenience of disassembly and assembly.

[0028] Furthermore, both the slot 22 and the block 42 are right-angled triangular structures, and the inclined surfaces of both the slot 22 and the block 42 are oriented towards the opening direction of the U-shaped opening 41. During the insertion of the support block 4, as the block 42 enters the limiting ring groove 21, its inclined surface contacts the outer wall of the limiting ring groove 21 and generates an abutment, thereby applying an outward pushing force to the two blocks 42 and automatically opening the U-shaped opening 41. The insertion operation of the support block 4 can be quickly completed without manually prying it open or using tools, improving the convenience of installing the support block 4.

[0029] To facilitate the insertion and replacement of the support block 4, the size of the locking block 42 is designed to be relatively small. However, due to the small size of the locking block 42, during the tightening of the spring screw, the spring compression force may prevent the support block 4 from rotating synchronously with the fixing rod 2, causing misalignment between the locking block 42 and the locking groove 22, affecting the locking of the support block 4. To address this, a limiting block 43 is provided at the innermost side of the U-shaped opening 41, and a limiting groove 23 for the insertion of the limiting block 43 is provided on the limiting ring groove 21. When the support block 4 is installed in place, the limiting block 43 is inserted into the limiting groove 23. Through the cooperation between the limiting block 43 and the limiting groove 23, the fixing rod 2 can drive the support block 4 to rotate synchronously, thereby ensuring that the support block 4 maintains a stable connection during tightening and avoiding misalignment.

[0030] 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.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A spring screw, comprising a nut (1), wherein a fixing rod (2) is fixedly connected to the bottom of the nut (1), and a threaded rod (3) is fixedly connected to the bottom of the fixing rod (2), characterized in that, The outer edge of the fixed rod (2) is provided with a limiting ring groove (21), and a support block (4) is movably connected to the limiting ring groove (21). The outer wall of the support block (4) is located outside the fixed rod (2). The fixed rod (2) is movably connected with a gasket (5), which is located above the support block (4). A spring body (6) is sleeved on the fixed rod (2), which is located between the gasket (5) and the support block (4). One end of the spring body (6) abuts against the gasket (5), and the other end abuts against the support block (4).

2. A spring screw according to claim 1, characterized in that, The support block (4) is provided with a U-shaped opening (41), and the two sides of the U-shaped opening (41) correspond to the limiting ring groove (21) for inserting the support block (4) directly into the limiting ring groove (21).

3. A spring screw according to claim 2, characterized in that, The nominal diameter of the threaded rod (3) is smaller than the diameter of the fixed rod (2), and the inner diameter of the spring body (6) and the diameter of the central hole of the washer (5) are both larger than the diameter of the fixed rod (2).

4. A spring screw according to claim 2, characterized in that, The support block (4) is made of elastic plastic material. The U-shaped opening (41) is symmetrically provided with locking blocks (42) on both sides. The limiting ring groove (21) is symmetrically provided with slots (22) for corresponding locking blocks (42) to be inserted on both sides. The locking blocks (42) and slots (22) are both arranged along the extension direction of the limiting ring groove (21).

5. A spring screw according to claim 4, characterized in that, Both the slot (22) and the block (42) are right-angled triangular structures, and the inclined surfaces of the slot (22) and the block (42) are both oriented toward the opening direction of the U-shaped opening (41).

6. A spring screw according to claim 5, characterized in that, The innermost side of the U-shaped opening (41) is provided with a limiting block (43), and the limiting ring groove (21) is provided with a limiting groove (23) for the insertion of the limiting block (43).

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