Self-locking screw

Abstract

The utility model discloses a self-locking type screw which comprises a screw end portion and a screw rod portion which are combined to form the screw, a fixing disc is fixed on the outer side of the upper end of the screw end portion, anti-skidding fixing teeth are arranged at the lower end of the fixing disc at equal angles, and a locking and reinforcing mechanism is arranged inside the screw end portion. The locking and reinforcing mechanism is composed of a fixed connecting block, a locking pin, a movable block and a spring, wherein the fixed connecting block conducts left-right telescopic movement in the end of the screw, the locking pin is fixed to the outer side face of the fixed connecting block, the movable block is fixed to the lower end of the fixed connecting block, and the spring is arranged between the movable block and the end of the screw. According to the self-locking type screw, the fixing disc drives the fixing teeth to be tightly engaged with a connected object, so that a certain anti-skid effect can be achieved, the screw at the end of the screw is prevented from loosening, the locking pin is inserted into the connected object, the screw can be effectively prevented from loosening in the long-term use process, and the service life of the screw is prolonged. And the connection tightness between the connected objects is improved.

Description

Technical Field

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

[0002] A screw is a tool that uses the physical and mathematical principles of the inclined plane, circular rotation, and friction to gradually fasten objects and machine parts. Its main function is to join two objects or fix the position of an object. It is a very common fastener, and a screw usually consists of an upper end and a threaded part at the lower end.

[0003] For example, publication number CN214367167U discloses a screw, which includes a connecting part and a head. The connecting part includes a threaded part, and a tightening groove is formed on the upper end face of the head. Guide grooves, which gradually increase in size along the upward direction of the axis, are formed on both side walls of the tightening groove, and the guide grooves penetrate the upper end face of the head. This application has the effect of facilitating the movement of the screwdriver tip into the tightening groove.

[0004] However, in the prior art, screws do not have locking components, so they are prone to loosening during long-term use, which affects the tightness of the connection between objects. For example, the comparative patents listed above have this problem.

[0005] To address this problem, we propose a self-locking screw. Utility Model Content

[0006] The purpose of this invention is to provide a self-locking screw to solve the problem mentioned in the background art, where screws without locking components are prone to loosening during long-term use, affecting the tightness of the connection between objects.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a self-locking screw, comprising a screw end and a screw shank that are combined to form the screw;

[0008] Also includes:

[0009] The fixing plate is fixed to the outer side of the upper end of the screw, and the lower end of the fixing plate is provided with fixing teeth at equal angles for anti-slip purposes. At the same time, the fixing plate drives the fixing teeth to engage with the object.

[0010] The locking and reinforcing mechanism is located inside the screw end and consists of a fixed connecting block that moves left and right inside the screw end, a locking pin fixed to the outer side of the fixed connecting block, a movable block fixed to the lower end of the fixed connecting block, and a spring located between the movable block and the screw end.

[0011] As a preferred embodiment of this utility model, through holes are provided on both the left and right sides of the screw end.

[0012] By employing the above technical solution, through holes are provided on both the left and right sides of the screw end, allowing the locking pin to extend and retract within the through holes, thereby locking the screw.

[0013] As a preferred embodiment of this utility model, the fixed connecting block drives the locking pin through the through hole, and a movable connecting block with an inclined side is fitted on the inner side of the fixed connecting block, and both the left and right ends of the movable connecting block are fitted with the inner side of the fixed connecting block.

[0014] Using the above technical solution, the locking pin is driven through the through hole by the fixed connecting block, and a movable connecting block with an inclined side is provided on the inner side of the fixed connecting block. The left and right ends of the movable connecting block are matched with the inner side of the fixed connecting block, which facilitates the extension and retraction of the locking pin.

[0015] As a preferred embodiment of this utility model, an auxiliary block is fixedly connected to the upper end of the movable connecting block, and a connecting bolt is rotatably connected to the upper end of the auxiliary block, the connecting bolt being threaded into the interior of the screw end.

[0016] Using the above technical solution, an auxiliary block is fixedly connected to the upper end of the movable connecting block, and a connecting bolt is rotatably connected to the upper end of the auxiliary block. The connecting bolt is threaded inside the end of the screw, which can drive the movable connecting block to extend and retract within the end of the screw.

[0017] As a preferred embodiment of this utility model, a drive head is fixedly connected to the upper end of the connecting bolt, and the drive head, together with the connecting bolt and the auxiliary block, drives the movable connecting block to move up and down at the end of the screw.

[0018] Using the above technical solution, a drive head is fixedly connected to the upper end of the connecting bolt, and the drive head, together with the connecting bolt and the auxiliary block, drives the movable connecting block to move up and down at the end of the screw. The movable connecting block can push the fixed connecting block to move left and right at the end of the screw.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: The self-locking screw has a fixing disc located on the outer side of the screw end, and the lower end of the fixing disc is provided with fixing teeth. The fixing disc drives the fixing teeth to tightly engage with the connected objects, thereby achieving a certain anti-slip effect and preventing the screw end from loosening. In addition, the connecting bolt, auxiliary block and movable connecting block drive the fixed connecting block to move left and right at the screw end. The fixed connecting block drives the locking pin to extend out of the through hole, so that the locking pin is inserted into the connected parts, thereby effectively preventing the screw from loosening during long-term use and improving the tightness of the connection between the connected objects.

[0020] 1. It is equipped with a fixing plate and fixing teeth. The fixing teeth are set at the lower end of the fixing plate at equal angles. The fixing plate drives the fixing teeth to mesh with the object being connected, thereby reducing the friction between the screw and the object being connected, which can achieve a good anti-slip effect.

[0021] 2. A locking and reinforcing mechanism is provided, which consists of a fixed connecting block and a locking pin. The locking and reinforcing mechanism can lock and limit the screw, preventing the screw from loosening during long-term use.

[0022] 3. It is equipped with a movable connecting block, an auxiliary block, and a connecting bolt. By setting the movable connecting block, the auxiliary block, and the connecting bolt, the fixed connecting block and the locking pin can be driven to move left and right inside the screw end, thereby facilitating the locking of the screw. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of this utility model from below;

[0025] Figure 3 This is a frontal sectional view of the present invention.

[0026] Figure 4 This is an exploded structural diagram of the present invention;

[0027] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0028] Figure 6 This is an exploded view of the movable connecting block, fixed connecting block, and locking pin of this utility model.

[0029] In the diagram: 1. Screw end; 2. Screw shank; 3. Fixing disc; 4. Fixing tooth; 5. Through hole; 6. Fixing connecting block; 7. Locking pin; 8. Moving block; 9. Spring; 10. Moving connecting block; 11. Auxiliary block; 12. Connecting bolt; 13. Drive head. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1-6.

[0032] To address the problem in existing technologies where screws lack locking components, leading to loosening during long-term use and affecting the tightness of object connections, this solution provides a self-locking screw comprising a screw end 1 and a screw shank 2. A fixing disc 3 is fixed to the outer side of the upper end of the screw end 1, and the lower end of the fixing disc 3 is provided with fixing teeth 4 at equal angles for anti-slip purposes. Simultaneously, the fixing disc 3 drives the fixing teeth 4 to engage with the object.

[0033] like Figure 1 and Figure 2 As shown, during use, the screw shank 2 is aligned with the screw hole of the object to be connected. An external tool is used to engage the upper end of the screw end 1. Then, the screw end 1 is rotated to drive the screw shank 2 to rotate, and the screw shank 2 is screwed into the screw hole to connect and limit the object. At the same time, when the screw shank 2 is screwed into the screw hole of the object, the fixing plate 3 drives the fixing teeth 4 to engage with the outer surface of the object, increasing the friction between the screw end 1 and the object, which can play a good anti-slip role.

[0034] Combined with the setting of locking and reinforcement mechanisms, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the locking and reinforcing mechanism is located inside the screw end 1, and consists of a fixed connecting block 6 that moves left and right inside the screw end 1, a locking pin 7 fixed to the outer side of the fixed connecting block 6, a movable block 8 fixed to the lower end of the fixed connecting block 6, and a spring 9 located between the movable block 8 and the screw end 1. A small tool matching the upper end of the drive head 13 is inserted into the slot at the upper end of the drive head 13 to rotate the drive head 13. The drive head 13 rotates relative to the screw end 1. A connecting bolt 12 is fixedly connected to the lower end of the drive head 13. The drive head 13 drives the connecting bolt 12 to rotate within the screw end 1. The connecting bolt 12 is threaded into the screw end 1, and the lower end of the connecting bolt 12 is connected to the auxiliary block 11. Rotation causes the connecting bolt 12 to move the movable connecting block 10 downwards. The movable connecting block 10, with its inclined side, is fitted onto the inner side of the fixed connecting block 6. Both ends of the movable connecting block 10 engage with the inner side of the fixed connecting block 6. The movable connecting block 10 pushes the fixed connecting block 6 to move to both sides, causing the fixed connecting block 6 to extend and retract the locking pin 7 within the through hole 5, extending it outwards and inserting it into the connected object. Furthermore, the fixed connecting block 6 causes the movable block 8 to compress the spring 9, resulting in elastic deformation of the spring 9. This effectively further limits the connection between the screw end 1 and the object, locking and limiting the screw to prevent loosening during long-term use and improving the tightness of the connection between the objects.

[0035] 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 self-locking screw, comprising a screw end (1) and a screw rod (2) combined to constitute the screw; characterized in that Further comprising: A fixing disc (3) fixed on the outer side of the upper end of the screw end (1), and the lower end of the fixing disc (3) is provided with fixing teeth (4) for anti-skid at equal angles, and the fixing disc (3) drives the fixing teeth (4) to engage on the object; A locking reinforcement mechanism arranged in the interior of the screw end (1), and the locking reinforcement mechanism is composed of a fixed connecting block (6) moving left and right in the interior of the screw end (1), a locking pin (7) fixed on the outer side of the fixed connecting block (6), a movable block (8) fixed on the lower end of the fixed connecting block (6), and a spring (9) arranged between the movable block (8) and the screw end (1).

2. A self-locking type screw according to claim 1, wherein: The screw end (1) is provided with a through hole (5) on both sides.

3. A self-locking type screw according to claim 1, wherein: The fixed connecting block (6) drives the locking pin (7) to penetrate in the through hole (5), and the inner side of the fixed connecting block (6) is provided with an active connecting block (10) with an inclined side face, and the left and right ends of the active connecting block (10) are matched with the inner side of the fixed connecting block (6).

4. A self-locking type screw according to claim 3, wherein: The upper end of the active connecting block (10) is fixedly connected with an auxiliary block (11), and the upper end of the auxiliary block (11) is rotatably connected with a connecting bolt (12), and the connecting bolt (12) is threadedly connected in the interior of the screw end (1).

5. A self-locking type screw according to claim 4, wherein: The upper end of the connecting bolt (12) is fixedly connected with a driving head (13), and the driving head (13) drives the active connecting block (10) to move up and down in the screw end (1) together with the connecting bolt (12) and the auxiliary block (11).

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