Self-tapping screw structure

Abstract

The utility model discloses a self-tapping screw structure, which relates to the technical field of self-tapping screws and comprises a self-tapping screw body, the top end of the self-tapping screw body is connected with a connecting end, and the top end of the connecting end is connected with a screw head. Through holes are symmetrically formed in the two sides of the surface of the connecting end at equal intervals, guide rods are symmetrically arranged on the inner wall of the connecting end, the surfaces of the guide rods are movably sleeved with connecting plates, supporting springs are connected between the connecting plates and the inner wall of the connecting end, and fixing nails connected with the interiors of the through holes are connected to one sides of the connecting plates at equal intervals. And one side of the connecting plate is connected with a first extrusion ball. According to the self-tapping screw, the second extrusion ball can be extruded to extrude the first extrusion ball, the first extrusion ball drives the connecting plate and the fixing nail to move, the fixing nail can penetrate through the through hole to penetrate into a material to form secondary locking, and the situation that the fixing effect of the self-tapping screw is affected due to the loosening risk caused by vibration or temperature change is avoided.

Description

Technical Field

[0001] This utility model relates to the field of self-tapping screw technology, and in particular to a self-tapping screw structure. Background Technology

[0002] Self-tapping screws, also known as quick-thread screws, are quick-installing fasteners made of steel with a galvanized and passivated surface. They are primarily used for connecting thin metal sheets (steel plates, saw blades, etc.). The connection process involves first drilling a threaded hole in the parts to be connected, then screwing the self-tapping screw into the threaded hole. Current self-tapping screws rely on the friction between the threads and the material; however, prolonged exposure to vibration or impact can cause them to loosen, thus affecting their fixing effect. Utility Model Content

[0003] This invention provides a self-tapping screw structure, which solves the problems in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A self-tapping screw structure includes a self-tapping screw body, a connecting end connected to the top of the self-tapping screw body, and a screw head connected to the top of the connecting end;

[0006] The connecting end has symmetrically spaced through holes on both sides of its surface, and guide rods are symmetrically arranged on the inner wall of the connecting end. A connecting plate is movably sleeved on the surface of the guide rod, and a support spring is connected between the connecting plate and the inner wall of the connecting end. A fixing nail connected to the inside of the through hole is equidistantly connected to one side of the connecting plate, and a first compression ball is connected to one side of the connecting plate.

[0007] With the above structure, after the self-tapping screw body is rotated into the designated position, the second extrusion ball can be moved to the surface of the first extrusion ball and extruded by extruding the second extrusion ball. This causes the first extrusion ball to move the connecting plate and the fixing screw, allowing the fixing screw to pass through the through hole and connect with the interior of the material for secondary locking.

[0008] The diameter of the connecting end is smaller than the diameter of the self-tapping screw body.

[0009] The above structure is adopted to avoid the diameter of the connection end being larger than the diameter of the self-tapping screw, which would affect subsequent installation.

[0010] The inner bottom of the connecting end is connected to a sleeve, and the sleeve is slidably connected to a support rod, and the top of the support rod is connected to a second extrusion ball that contacts the surface of the first extrusion ball.

[0011] The above structure facilitates the support and positioning of the second extrusion ball through the sleeve and support rod, so that the second extrusion ball is located at the top of the first extrusion ball.

[0012] The top of the nail head has a hexagonal groove, and the inner wall of the hexagonal groove has symmetrical slots.

[0013] With the above structure, the self-tapping screw can be rotated and installed using a flathead tool or a hex bolt.

[0014] The hexagonal groove at the center of the top of the nail head is a through-hole design.

[0015] The above structure facilitates the compression of the second extrusion ball through the hexagonal groove, allowing it to move.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] In this invention, by pressing the second extrusion ball, it can press the first extrusion ball, and the first extrusion ball can drive the connecting plate and the fixing pin to move. This allows the fixing pin to pass through the through hole and penetrate deep into the material to form a secondary lock, avoiding the risk of loosening of the self-tapping screw due to vibration or temperature changes, thus affecting its fixing effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a self-tapping screw structure;

[0019] Figure 2 This is a schematic diagram of the surface structure of the connecting end in this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the connecting end in this utility model.

[0021] Legend:

[0022] 1. Self-tapping screw body; 2. Connecting end; 3. Screw head; 4. Through hole; 5. Guide rod;

[0023] 6. Connecting plate; 7. Spring; 8. Fixing pin; 9. First compression ball; 10. Sleeve;

[0024] 11. Support rod; 12. Second extrusion ball; 13. Hexagonal groove; 14. Slotted groove. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-3A self-tapping screw structure includes a self-tapping screw body 1, a connecting end 2 connected to the top of the self-tapping screw body 1, and a screw head 3 connected to the top of the connecting end 2. Multiple through holes 4 are symmetrically and equidistantly opened on both sides of the connecting end 2. Guide rods 5 are symmetrically arranged on the inner wall of the connecting end 2. A connecting plate 6 is movably connected to the surface of the guide rod 5. A fixing screw 8 and a spring 7 are connected to one side of the connecting plate 6, and a first compression ball 9 is connected to the other side. By compressing the first compression ball 9, the connecting plate 6 is moved on the surface of the guide rod 5, so that the fixing screw 8 on one side of the connecting plate 6 can pass through the through hole 4 and enter the interior of the material to achieve secondary locking.

[0027] Furthermore, in order to ensure that the self-tapping screw can be inserted into the material, the diameter of the connecting end 2 needs to be smaller than the diameter of the self-tapping screw, so as to avoid the connecting end 2 being too large, which would prevent it from being inserted into the material.

[0028] Furthermore, in order to ensure that the first extrusion ball 9 can be easily extruded, a sleeve 10 needs to be provided at the bottom of the inner end of the connecting end 2. The support rod 11 is slidably connected inside the sleeve 10, and the top of the support rod 11 is connected to the second extrusion ball 12. The second extrusion ball 12 is located above the first extrusion ball 9, so that after the second extrusion ball 12 is extruded, it can be moved to the surface of the first extrusion ball 9 to extrude it, so that the first extrusion ball 9 can drive the connecting plate 6 and the like to move.

[0029] Furthermore, to facilitate the installation of self-tapping screws, a hexagonal groove 13 can be made at the top of the screw head 3, which can be rotated and installed using a hex wrench. A flat slot 14 is symmetrically provided on the surface of the hexagonal groove 13 to facilitate installation using a flathead tool. At the same time, the hexagonal groove 13 is through-hole designed so that the hex wrench can be passed through the hexagonal groove 13 to press the second compression ball 12 and move it.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-tapping screw structure, comprising a self-tapping screw body (1), characterized in that: The top end of the self-tapping screw body (1) is connected to a connecting end (2), and the top end of the connecting end (2) is connected to a screw head (3); The connecting end (2) has through holes (4) symmetrically and equidistantly opened on both sides of its surface, and guide rods (5) are symmetrically arranged on the inner wall of the connecting end (2). A connecting plate (6) is movably sleeved on the surface of the guide rod (5), and a support spring (7) is connected between the connecting plate (6) and the inner wall of the connecting end (2). A fixing nail (8) connected to the inside of the through hole (4) is equidistantly connected on one side of the connecting plate (6), and a first extrusion ball (9) is connected on one side of the connecting plate (6).

2. The self-tapping screw structure according to claim 1, characterized in that: The diameter of the connecting end (2) is smaller than the diameter of the self-tapping screw body (1).

3. The self-tapping screw structure according to claim 1, characterized in that: The inner bottom of the connecting end (2) is connected to a sleeve (10), and the sleeve (10) is slidably connected to a support rod (11), and the top end of the support rod (11) is connected to a second extrusion ball (12) that is in contact with the surface of the first extrusion ball (9).

4. The self-tapping screw structure according to claim 1, characterized in that: The top of the nail head (3) is provided with a hexagonal groove (13), and the inner wall of the hexagonal groove (13) is symmetrically provided with a slot (14).

5. The self-tapping screw structure according to claim 1, characterized in that: The hexagonal groove (13) at the center of the top of the nail head (3) is through-hole.

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