Anti-loosening self-tapping screw

Abstract

The utility model discloses an anti-loosening self-tapping screw, and relates to the field of screws. The anti-loosening self-tapping screw comprises a screw body, the screw body comprises a spiral part and a rotating part, the rotating part is arranged at the end of the spiral part, and a fastening unit is arranged at the end, close to the rotating part, of the spiral part; the fastening unit comprises a plurality of extrusion strips which are arranged in a circumferential array mode, and a gap is formed between every two adjacent extrusion strips. According to the anti-loosening self-tapping screw, the multiple extrusion strips are arranged, after a screw hole is tapped out of a mounting part through the spiral part, the spiral part can be screwed into the screw hole till the multiple extrusion strips can be extruded into the screw hole, and under the action of the multiple extrusion strips, the hole opening of the screw hole is slightly expanded; therefore, the plurality of extrusion strips are connected with the orifices of the screw holes more tightly, and the situation that the spiral part, the rotating part and the mounting part are loosened is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a self-tapping screw that is anti-loosening. Background Art

[0002] Self-tapping screws are threaded fasteners that tap a matching female thread into a pre-drilled hole in a metal or non-metallic material. They are primarily used to connect thin metal sheets (such as steel and sawn metal). Because the threaded surface of the self-tapping screw is highly hard, it can create internal threads in the threaded bottom hole of the connected parts, thus forming a connection.

[0003] There are many conventional self-tapping screws that can be directly disassembled by people using tools. Even if they are not disassembled, they will become loose over time, making it difficult to meet the requirements of certain products for preventing disassembly and loosening at special positions. Therefore, this application proposes a self-tapping screw that prevents loosening. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a self-tapping screw that prevents loosening, which solves the problem that many conventional self-tapping screws can be directly disassembled by people using tools, but even if they are not disassembled, they will loosen over time, making it difficult to meet the requirements of anti-disassembly and anti-loosening at special positions of certain products.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a self-tapping screw that prevents loosening, comprising a screw body, the screw body comprising a spiral portion and a rotating portion, the rotating portion being arranged at the end of the spiral portion, and a fastening unit being arranged at the end of the spiral portion close to the rotating portion;

[0006] The fastening unit includes a plurality of extrusion bars, which are arranged in a circular array, and a gap is provided between two adjacent extrusion bars.

[0007] Preferably, a sealing ring is fixedly sleeved on the top end of the spiral portion, and the sealing ring is fixedly connected to the rotating portion.

[0008] Preferably, an annular groove is formed at the top end of the spiral portion, and the top ends of the plurality of extrusion strips are fixedly connected between the inner wall of the annular groove and the outer side of the sealing ring.

[0009] Preferably, the cross section of the rotating part is set to be a regular hexagon, and a cross groove is provided at the top of the rotating part.

[0010] Preferably, the extruded strip includes a connecting portion and an extruding portion, and the bottom of the connecting portion is fixedly connected to the extruding portion.

[0011] Preferably, the bottom end of the connecting portion is bent outward, and the bottom end of the extruding portion is bent inward.

[0012] The utility model discloses a self-tapping screw that prevents loosening, which has the following beneficial effects: the self-tapping screw that prevents loosening, during use, utilizes the provided spiral portion and the rotating portion, and when the rotating portion is rotated by a tool, the spiral portion can be driven into the installation portion, thereby realizing the installation of the screw body, and through the provided multiple extrusion strips, after the spiral portion taps the installation portion out of the screw hole, the spiral portion can be screwed into the screw hole until the multiple extrusion strips can be squeezed into the screw hole, and under the action of the multiple extrusion strips, the hole opening of the screw hole is slightly expanded, so that the multiple extrusion strips are more tightly connected to the hole opening of the screw hole, thereby preventing the spiral portion and the rotating portion from loosening with the installation portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a partial structural diagram of the utility model;

[0016] Figure 3 This is a structural diagram of the fastening unit of the utility model.

[0017] In the figure: 1. screw body; 11. spiral part; 12. rotating part; 13. sealing ring; 14. annular groove; 2. fastening unit; 21. extrusion strip; 211. connecting part; 212. extrusion part. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] The embodiment of the present application solves the problem that many conventional self-tapping screws can be directly disassembled by tools, but even if they are not disassembled, they will become loose over time, making it difficult to meet the requirements of certain products for anti-disassembly and anti-loosening at special positions. By providing multiple extrusion strips 21, after the spiral portion 11 taps the installation part out of the screw hole, the spiral portion 11 can be screwed into the screw hole until the multiple extrusion strips 21 can be squeezed into the screw hole. Under the action of the multiple extrusion strips 21, the hole opening of the screw hole is slightly expanded, so that the multiple extrusion strips 21 are more tightly connected to the hole opening of the screw hole, thereby preventing the spiral portion 11 and the rotating portion 12 from loosening from the installation part.

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0021] The embodiment of the utility model discloses a self-tapping screw which is prevented from loosening.

[0022] According to the attached Figure 1-3 As shown, it includes a screw body 1, the screw body 1 includes a spiral portion 11 and a rotating portion 12, the rotating portion 12 is provided at the end of the spiral portion 11, and a fastening unit 2 is provided at the end of the spiral portion 11 close to the rotating portion 12;

[0023] The fastening unit 2 includes a plurality of extrusion bars 21 , which are arranged in a circular array, and a gap is provided between two adjacent extrusion bars 21 .

[0024] During use, by utilizing the provided spiral portion 11 and rotating portion 12, when the rotating portion 12 is rotated by a tool, the spiral portion 11 can be driven into the installation portion, thereby realizing the installation of the screw body 1, and by providing multiple extrusion strips 21, after the spiral portion 11 drives the installation portion out of the screw hole, the spiral portion 11 can be screwed into the screw hole until the multiple extrusion strips 21 can be squeezed into the screw hole. Under the action of the multiple extrusion strips 21, the hole opening of the screw hole is slightly expanded, so that the multiple extrusion strips 21 are more tightly connected to the hole opening of the screw hole, thereby avoiding the spiral portion 11 and the rotating portion 12 from loosening from the installation portion.

[0025] It is particularly disclosed that a sealing ring 13 is fixedly sleeved on the top end of the spiral portion 11 , and the sealing ring 13 is fixedly connected to the rotating portion 12 .

[0026] The sealing ring 13 is provided to seal and protect the spiral portion 11 .

[0027] Specifically disclosed, an annular groove 14 is formed at the top of the spiral portion 11 , and the tops of the plurality of extrusion strips 21 are fixedly connected between the inner wall of the annular groove 14 and the outer side of the sealing ring 13 .

[0028] Furthermore, the cross section of the rotating portion 12 is configured to be a regular hexagon, and a cross slot is provided at the top of the rotating portion 12 .

[0029] This enables the user to rotate the rotating portion 12 using both a hexagonal wrench and a screwdriver.

[0030] Furthermore, the extruded strip 21 includes a connecting portion 211 and an extruding portion 212 , and the bottom of the connecting portion 211 is fixedly connected to the extruding portion 212 .

[0031] Furthermore, the bottom end of the connecting portion 211 is bent outward, and the bottom end of the extruding portion 212 is bent inward.

[0032] During use, after the spiral part 11 taps out the screw hole in the installation part, the bottom end of the extrusion part 212 that is bent inward is first screwed into the screw hole. Because the connection between the connecting part 211 and the extrusion part 212 is bent outward, the connection between the connecting part 211 and the extrusion part 212 can fit tightly with the screw hole, thereby slightly expanding the hole mouth of the screw hole and achieving an effective fastening effect.

[0033] During use, by utilizing the provided spiral portion 11 and rotating portion 12, when the rotating portion 12 is rotated by a tool, the spiral portion 11 can be driven into the installation portion, thereby realizing the installation of the screw body 1, and by providing multiple extrusion strips 21, after the spiral portion 11 drives the installation portion out of the screw hole, the spiral portion 11 can be screwed into the screw hole until multiple extrusion strips 21 can be squeezed into the screw hole, and the bottom end of the extrusion portion 212 bent inward is first screwed into the screw hole. Because the connection between the connecting portion 211 and the extrusion portion 212 is bent outward, the connection between the connecting portion 211 and the extrusion portion 212 can fit tightly with the screw hole, realizing a slight expansion of the hole mouth of the screw hole, achieving an effective fastening effect, making the multiple extrusion strips 21 more tightly connected to the hole mouth of the screw hole, and avoiding the spiral portion 11 and the rotating portion 12 from loosening with the installation portion.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A self-tapping screw that prevents loosening, comprising a screw body (1), characterized in that: The screw body (1) comprises a spiral portion (11) and a rotating portion (12), wherein the rotating portion (12) is arranged at an end of the spiral portion (11), and a fastening unit (2) is provided at an end of the spiral portion (11) close to the rotating portion (12); The fastening unit (2) comprises a plurality of extrusion strips (21), the plurality of extrusion strips (21) are arranged in a circumferential array, and a gap is provided between two adjacent extrusion strips (21).

2. The anti-loosening self-tapping screw according to claim 1, characterized in that: A sealing ring (13) is fixedly sleeved on the top end of the spiral portion (11), and the sealing ring (13) is fixedly connected to the rotating portion (12).

3. The anti-loosening self-tapping screw according to claim 2, characterized in that: An annular groove (14) is provided at the top end of the spiral portion (11), and the top ends of the plurality of extrusion strips (21) are fixedly connected between the inner wall of the annular groove (14) and the outer side of the sealing ring (13).

4. The anti-loosening self-tapping screw according to claim 1, characterized in that: The cross section of the rotating part (12) is arranged to be a regular hexagon, and a cross groove is provided at the top end of the rotating part (12).

5. The anti-loosening self-tapping screw according to claim 1, characterized in that: The extrusion strip (21) comprises a connecting portion (211) and an extrusion portion (212), and the bottom of the connecting portion (211) is fixedly connected to the extrusion portion (212).

6. The anti-loosening self-tapping screw according to claim 5, characterized in that: The bottom end of the connecting portion (211) is bent outward, and the bottom end of the extruding portion (212) is bent inward.

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