Self-tapping screw capable of being secondarily reinforced

Abstract

The utility model provides a self-tapping screw capable of being secondarily reinforced, which belongs to the technical field of self-tapping screws and comprises a self-tapping screw integrally formed by a screw rod and a screw head, a reinforcing screw block is arranged at the upper end of a screw body of the screw rod, and the screw rod penetrates through the screw rod from bottom to top and is in threaded connection with the reinforcing screw block in a clockwise twisting mode. Through the spiral twisting design of the reinforcing screw block and the reinforcing piece at the upper end of the self-tapping screw, the reinforcing piece can anticlockwise twist and descend at the upper end of the self-tapping screw, the abutting and meshing strength of the reinforcing meshing teeth on the bottom face of the reinforcing piece to a plate is enhanced, and secondary reinforcing of the self-tapping screw to the plate is achieved; the problem that the self-tapping screws are loosened due to acting force of plates is solved, and practicability is high.

Description

Technical Field

[0001] The utility model relates to a self-tapping screw capable of secondary reinforcement, belonging to the technical field of self-tapping screws. Background Art

[0002] Self-tapping screws are screws with a drill bit. They are constructed with a special electric tool, and drilling, tapping, fixing and locking are completed at one time. Self-tapping screws have a certain surface hardness and mechanical strength, and have tapping and fastening functions. They are mainly used for the connection and fixing of some thinner plates.

[0003] Self-tapping screws still have shortcomings in use. Since self-tapping screws have no secondary reinforcement, when a plate is reinforced with the self-tapping screws, the self-tapping screws are often loosened due to the force of the plate during use. In view of the above shortcomings, the utility model proposes a self-tapping screw that can be reinforced twice. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a self-tapping screw that can be reinforced twice to solve the existing problems.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a self-tapping screw that can be reinforced twice, including a self-tapping screw composed of a screw rod and a screw head as an integral whole, a reinforcing screw block is arranged at the upper end of the screw rod body, and the reinforcement is connected to the reinforcing screw block by twisting the screw clockwise from bottom to top, and the self-tapping screw is reinforced twice when the reinforcement piece is twisted counterclockwise and descended on the reinforcing screw block, a reinforcing external thread is provided on the outer surface of the reinforcing screw block, the reinforcement piece includes a reinforcement piece body, and a through opening is opened through the middle part of the reinforcement piece body, an internal thread is opened on the inner wall of the through opening, and the reinforcing external thread is adapted to the internal thread.

[0006] A further improvement is that the diameter of the reinforcement is 6-8 mm larger than the diameter of the screw head.

[0007] A further improvement is that the diameter of the reinforcing screw block is 0.8-1.2 mm larger than the diameter of the screw rod.

[0008] A further improvement is that a plurality of twist openings are symmetrically provided on the top surface of the reinforcement body.

[0009] A further improvement is that a plurality of reinforcing teeth are arranged in a circular array on the bottom surface of the reinforcement body.

[0010] A further improvement is that, in the present invention, the diameter of the reinforcing screw block is 0.9 mm larger than the diameter of the screw rod.

[0011] A further improvement is that the diameter of the reinforcement member used in the present invention is 8 mm larger than the diameter of the screw head.

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides a self-tapping screw that can be reinforced twice. Through the spiral twisting design of the reinforcing screw block and the reinforcing member on the upper end of the self-tapping screw, the reinforcing member can be twisted counterclockwise and lowered on the upper end of the self-tapping screw, thereby enhancing the bite strength of each reinforcing tooth on the bottom surface of the reinforcing member against the plate, realizing the secondary reinforcement of the self-tapping screw to the plate, solving the problem of loosening of the self-tapping screw due to the force of the plate, and having high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a self-tapping screw capable of secondary reinforcement according to the utility model;

[0015] Figure 2 This is a schematic diagram of the top surface structure of the reinforcement member of the utility model;

[0016] Figure 3 It is a schematic diagram of the bottom structure of the reinforcement member of the utility model. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] See also Figure 1-Figure 3 The utility model provides a technical solution of a self-drilling screw capable of secondary reinforcement: comprising a self-drilling screw 1 integrally formed by a screw rod 11 and a screw head 12, wherein a reinforcing screw block 13 is arranged at the upper end of the rod body of the screw rod 11, and a reinforcing member 2 is connected to the reinforcing screw block 13 by twisting the screw rod 11 clockwise from bottom to top, and when the reinforcing member 2 is twisted counterclockwise and descended on the reinforcing screw block 13, the self-drilling screw 1 is reinforced for the second time, and a reinforcing external thread is provided on the outer surface of the reinforcing screw block 13, and the reinforcing member 2 comprises a reinforcing member. The reinforcement body 21 has a through opening 22 in the middle thereof, an inner thread 221 is provided on the inner wall of the through opening 22, the reinforcement outer thread is matched with the inner thread 221, the diameter of the reinforcement 2 is 6-8mm larger than the diameter of the screw head 12, the diameter of the reinforcement screw block 13 is 0.8-1.2mm larger than the diameter of the screw rod 11, a plurality of twist openings 23 are symmetrically provided on the top surface of the reinforcement body 21, and a plurality of reinforcement teeth 24 are arranged in a circular array on the bottom surface of the reinforcement body 21.

[0019] Working principle:

[0020] First, pass the reinforcement member 2 through the screw 11 from bottom to top and twist it clockwise to the reinforcement screw block 13. Since the diameter of the reinforcement screw block 13 is larger than the diameter of the screw 11, it can be screwed together. It should be noted that the reinforcement member 2 should be twisted clockwise to the greatest extent. This is done to facilitate the subsequent counterclockwise twisting of the self-tapping screw 1 during the secondary reinforcement. Then, the self-tapping screw 1 is used to self-tap and fix the plate. At this time, the various reinforcement teeth 24 on the bottom surface of the reinforcement member 2 will engage with the plate. Since the diameter of the reinforcement member 2 is larger than the diameter of the screw head 12, a tool is then used to insert it from the upper end of the screw head 12 into the two symmetrical twisting openings 23, and twist it counterclockwise, so that the reinforcement member 2 spirals down on the reinforcement screw block 12, so that the various reinforcement teeth 24 on the bottom surface of the reinforcement member 2 increase the engagement strength with the plate, thereby achieving secondary reinforcement of the self-tapping screw 1.

[0021] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0022] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A self-tapping screw capable of secondary reinforcement, comprising a self-tapping screw (1) integrally formed of a screw rod (11) and a screw head (12), characterized in that: The upper end of the rod body of the screw rod (11) is provided with a reinforcing screw block (13), and a reinforcing member (2) is threadedly connected to the reinforcing screw block (13) by passing through the screw rod (11) from bottom to top and twisting clockwise. When the reinforcing member (2) is twisted counterclockwise and descends on the reinforcing screw block (13), the self-tapping screw (1) is reinforced for a second time. The outer surface of the reinforcing screw block (13) is provided with a reinforcing external thread. The reinforcing member (2) comprises a reinforcing member body (21), and a through opening (22) is provided in the middle of the reinforcing member body (21). An internal thread (221) is provided on the inner wall of the through opening (22), and the reinforcing external thread is matched with the internal thread (221).

2. A self-tapping screw capable of secondary reinforcement according to claim 1, characterized in that: The diameter of the reinforcement member (2) is 6-8 mm larger than the diameter of the screw head (12).

3. A self-tapping screw capable of secondary reinforcement according to claim 2, characterized in that: The diameter of the reinforcing screw block (13) is 0.8-1.2 mm larger than the diameter of the screw rod (11).

4. The self-tapping screw capable of secondary reinforcement according to claim 1, characterized in that: The top surface of the reinforcement body (21) is symmetrically provided with a plurality of twist openings (23).

5. The self-tapping screw capable of secondary reinforcement according to claim 1, characterized in that: A plurality of reinforcing teeth (24) are arranged in a circular array on the bottom surface of the reinforcement body (21).

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