A type of self-tapping screw

Abstract

This utility model provides a self-tapping screw, relating to the field of self-tapping screws, comprising: a locking cap and a screw head. A screw shank is connected to the lower end of the screw head, and the surface of the screw shank has threads. The upper end of the locking cap has a relief groove and a through hole, and the lower side of the relief groove has an adapter groove. The through hole is located outside the relief groove, and a bolt and a nut are installed in the through hole. The bolt is connected inside the nut, and the lower end of the bolt is connected to a positioning post. The screw head is rotatably connected inside the adapter groove, and the upper end of the screw head has an internal hexagonal slot, and the bottom of the internal hexagonal slot has a Phillips head slot. This utility model facilitates the disassembly of the self-tapping screw itself and provides an installation method compatible with two different tools.

Description

Technical Field

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

[0002] Self-tapping screws are screws with a drill bit that can be drilled, tapped, fixed, and tightened in one go using a special power tool. They have a pointed tip and coarse threads, so there is no need to pre-drill holes in the material; they can be directly screwed into the material to achieve a fixing and locking effect. A search revealed existing technology (publication number: CN222687064U), which describes "a self-tapping screw with a locking structure, comprising a screw body, the screw body consisting of a screw head, a screw shank, and threads. The screw head is fixed above the screw shank, the threads are wrapped around and fixedly disposed on the screw shank, the screw head also has a slot, the bottom of the screw shank is pointed, the screw body also has a cavity, the cavity extends downward from the top of the screw head into the screw shank, the cavity is provided with a limiting device, the screw shank has an opening on one side that extends into the cavity and communicates with the cavity, the opening is provided with a locking device, the limiting device fits with the locking device, by providing the locking device, the locking device can extend from the side of the screw shank and cooperate with the workpiece to lock the screw body when the self-tapping screw is screwed to the bottom."

[0003] Although the self-tapping screws mentioned in the aforementioned patent documents achieve the locking function, in actual use, the locking structure requires manual hammering, which is quite troublesome. Moreover, after locking, it is not easy to release it, which makes the self-tapping screws inconvenient to disassemble, and consequently, it is inconvenient to disassemble and repair products with such self-tapping screws installed. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, a self-tapping screw is provided to solve the problems mentioned in the background.

[0005] To achieve the above objectives, a self-tapping screw is provided, comprising: a locking cap and a screw head, the lower end of the screw head being connected to a screw shank, and the surface of the screw shank being provided with threads; the upper end of the locking cap being provided with a relief groove and a through hole, and the lower side of the relief groove being provided with an adapter groove; the through hole being provided on the outside of the relief groove; a bolt and a nut being provided in the through hole, and the bolt being connected inside the nut; the lower end of the bolt being connected to a positioning post; the screw head being rotatably connected inside the adapter groove; the upper end of the screw head being provided with an internal hexagonal slot, and the bottom of the internal hexagonal slot being provided with a cross-shaped slot.

[0006] Furthermore, the cross-section of the internal hexagonal slot is designed as a regular hexagonal structure, and the inner diameter of the internal hexagonal slot is equal to the inner diameter of the clearance slot.

[0007] Furthermore, there are four through holes, which are arranged in a ring at equal intervals on the outer periphery of the relief groove.

[0008] Furthermore, a downwardly extending guide groove is provided at the bottom of the through hole and inside the locking cap, and a nut is fixed at the connection between the through hole and the guide groove.

[0009] Furthermore, the positioning pile is slidably connected in the guide groove, and the bottom of the positioning pile is provided with a conical structure, and the outer wall of the conical body is provided with a raised spiral plate structure.

[0010] Furthermore, the upper and lower end faces of the screw head are provided with balls, and the balls are rotatably connected to the inner wall of the adapter groove.

[0011] Furthermore, the lower end of the screw head is connected to a transition section, and the connection between the transition section and the screw rod is provided with a tapered surface.

[0012] Furthermore, the lower end of the screw rod is provided with a tapered body, and the screw threads extend to the surface of the tapered body.

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

[0014] 1. When using, use a Phillips screwdriver or an Allen wrench with a Phillips head or an Allen head slot to rotate the screw into the mounting part. Using two tools for installation means that if one of the Phillips head or the Allen head slot slips, it can be installed or removed in another way, which improves the ease of use.

[0015] 2. After the screw rod is installed and fixed, rotate the bolt and nut downwards using the handle to move the positioning pin downwards and screw it into the mounting component. At this time, a locking function is achieved around the screw head, thus preventing the screw rod from loosening. At the same time, during disassembly, the positioning pin can be removed from the connecting mounting component by reversing the bolt, and then the screw rod can be removed using a screwdriver or Allen wrench, thus facilitating the disassembly and maintenance of the component. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the overall appearance of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic cross-sectional view of an embodiment of the present utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the screw head and screw rod according to an embodiment of the present utility model.

[0019] Figure 4 This is a top view of the screw head structure according to an embodiment of the present utility model.

[0020] Figure 5 This is an embodiment of the present utility model. Figure 2 Schematic diagram of the structure at point A in the middle.

[0021] In the diagram: 1. Locking cap; 11. Clearance groove; 12. Through hole; 13. Positioning post; 14. Bolt; 15. Nut; 16. Guide groove; 17. Adapter groove; 2. Screw head; 21. Screw rod; 22. Thread; 23. Socket hex socket; 24. Ball bearing; 25. Transition section; 26. Cross groove. Detailed Implementation

[0022] 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.

[0023] Please refer to Figures 1 to 5 As shown, this utility model provides a self-tapping screw, including: a locking cap 1 and a screw head 2. The lower end of the screw head 2 is connected to a screw rod 21, and the surface of the screw rod 21 is provided with threads 22. The upper end of the locking cap 1 is provided with a relief groove 11 and a through hole 12, and the lower side of the relief groove 11 is provided with an adapter groove 17. At the same time, the through hole 12 is provided on the outside of the relief groove 11. A bolt 14 and a nut 15 are provided in the through hole 12, and the bolt 14 is connected inside the nut 15. The lower end of the bolt 14 is connected to a positioning post 13. The screw head 2 is rotatably connected inside the adapter groove 17, and the upper end of the screw head 2 is provided with an internal hexagonal groove 23, and the bottom of the internal hexagonal groove 23 is provided with a cross groove 26.

[0024] In this embodiment, the interior and lower connecting component of the locking cap 1, as well as the screw head 2 and the lower connecting component, constitute the main structure of the self-tapping screw involved in this application.

[0025] Specifically, the outer diameters of both the locking cap 1 and the screw head 2 are larger than the outer diameter of the screw rod 21.

[0026] Specifically, bolt 14 is a socket head cap screw.

[0027] like Figure 2 , Figure 3 and Figure 4In the middle, the cross-section of the internal hexagonal slot 23 is set as a regular hexagonal structure, and the inner diameter of the internal hexagonal slot 23 is equal to the inner diameter of the relief slot 11. Both the upper and lower end faces of the screw head 2 are provided with ball bearings 24, and the ball bearings 24 are rotatably connected to the inner wall of the transition groove 17. The lower end of the screw head 2 is connected to a transition section 25, and the transition section 25 is provided with a tapered surface at the connection with the screw rod 21. The lower end of the screw rod 21 is provided with a tapered body, and the thread 22 extends to the surface of the tapered body.

[0028] Specifically, the screw head 2, screw rod 21, and screw thread 22 are designed as a single integrated structure.

[0029] Specifically, the upper and lower walls of the adapter groove 17 provide limiting support for the screw head 2, allowing it to rotate freely inside the adapter groove 17 via the ball bearings 24.

[0030] like Figure 2 , Figure 3 and Figure 5 In the middle, there are four through holes 12, and the through holes 12 are arranged in a ring at equal intervals on the outer periphery of the clearance groove 11. The bottom of the through holes 12 and inside the locking cap 1 are provided with a downward extending guide groove 16, and the nut 15 is fixed at the connection between the through hole 12 and the guide groove 16. The positioning post 13 is slidably connected in the guide groove 16, and the bottom of the positioning post 13 is provided with a conical structure, and the outer wall of the conical body is provided with a raised spiral plate structure.

[0031] It should be noted that before rotating the screw head 2 for installation, the positioning post 13 is screwed into the guide groove 16 until the lower end of the screw head 2 contacts the plane of the mounting component.

[0032] As a preferred embodiment, by providing a shorter positioning post 13 and a conical body and spiral plate structure at the lower end, it is made easier to screw into the component.

[0033] During use, a Phillips screwdriver or an Allen wrench is used with either the Phillips or Allen head slot to rotate the screw into the mounting component. This two-tool installation method allows for easy installation or removal if either the Phillips or Allen head slot slips, improving usability. After the screw is installed and secured, the bolt and nut are rotated downwards using the handle, causing the positioning pin to move downwards and into the mounting component. This creates a locking mechanism around the screw head, preventing loosening. For disassembly, the positioning pin can be reversed to remove it from the mounting component first, and then the screw can be removed using a screwdriver or Allen wrench, facilitating easy disassembly and maintenance of the component.

[0034] The self-tapping screw of this invention can effectively solve the problems mentioned in the background technology. Based on the existing self-tapping screw technology, it can facilitate the installation and disassembly of the locking structure, making the self-tapping screw itself easy to disassemble, and it can also be installed with two types of tools.

[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-augering screw comprising: The lock cap (1) and screw head (2) are provided with a screw rod (21) at the lower end of the screw head (2) and the screw rod (21) is provided with threads (22) on the surface. The lock cap (1) is characterized in that: the upper end of the lock cap (1) is provided with a relief groove (11) and a through hole (12), and the lower side of the relief groove (11) is provided with a transition groove (17). At the same time, the through hole (12) is provided on the outside of the relief groove (11). The through hole (12) is provided with a bolt (14) and a nut (15), and the bolt (14) is connected inside the nut (15). The lower end of the bolt (14) is connected with a positioning post (13). The screw head (2) is rotatably connected inside the transition groove (17). The upper end of the screw head (2) is provided with an internal hexagonal groove (23), and the bottom of the internal hexagonal groove (23) is provided with a cross groove (26).

2. A self-aughting screw as defined in claim 1, wherein The cross-section of the internal hexagonal groove (23) is set as a regular hexagonal structure, and the inner diameter of the internal hexagonal groove (23) is equal to the inner diameter of the relief groove (11).

3. A self-aughting screw as defined in claim 1, wherein The through holes (12) are provided in four places, and the through holes (12) are arranged in a ring at equal intervals on the outer periphery of the relief groove (11).

4. A self-aughting screw as defined in claim 1, wherein A downwardly extending guide groove (16) is provided at the bottom of the through hole (12) and inside the locking cap (1), and a nut (15) is fixed at the connection between the through hole (12) and the guide groove (16).

5. A self-aughting screw as defined in claim 1, wherein The positioning pile (13) is slidably connected in the guide groove (16), and the bottom of the positioning pile (13) is provided with a conical structure, and the outer wall of the conical body is provided with a protruding spiral plate structure.

6. A self-aughting screw as defined in claim 1, wherein The upper and lower end faces of the screw head (2) are provided with ball bearings (24), and the ball bearings (24) are rotatably connected to the inner wall of the adapter groove (17).

7. A self-aughting screw as defined in claim 1, wherein The lower end of the screw head (2) is connected to a transition section (25), and a tapered surface is provided at the connection between the transition section (25) and the screw rod (21).

8. A self-aughting screw as defined in claim 1, wherein The lower end of the screw rod (21) is provided with a cone shape, and the screw thread (22) extends to the surface of the cone shape.

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