Anti-loosening screw with self-locking structure

Abstract

The utility model relates to the technical field of fasteners, and discloses an anti-loosening screw with a self-locking structure, which comprises a screw main body, the top end of the screw main body is fixedly connected with a screw head, the bottom end of the screw head is provided with a positioning plate, the outside of the screw main body is provided with a limiting nut, and the limiting nut is provided with a self-locking structure. The bottom end of the limiting nut is provided with a self-locking nut, the bottom end of the self-locking nut is fixedly connected with a limiting plate, the limiting nut is internally provided with a first internal thread, and the self-locking nut is internally provided with a second internal thread. According to the anti-loosening screw with the self-locking structure, the screw is positioned through the self-locking nut, the self-locking nut is installed outside the screw body, the self-locking nut and the screw body are installed in an anticlockwise screwing mode, the limiting nut and the screw body are installed in a clockwise screwing mode, and when the self-locking nut is installed, a connecting ring on the top is screwed into a connecting groove of the limiting nut to be fixed; according to the structure, a self-locking structure is achieved, the nut is prevented from loosening, and the problem that the self-locking effect is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to an anti-loosening screw with a self-locking structure. Background Art

[0002] Screw is a general term for fasteners. Screws are tools that use the physical and mathematical principles of the inclined circular rotation of an object and friction to gradually fasten objects and parts. Screws are an indispensable industrial necessity in daily life.

[0003] There are many types of screws. Common screws are used in conjunction with nuts to achieve fastening. However, after installation, due to the vibration of the object and the friction during use, the screws can easily become loose or stripped, thus affecting the stability of the screw fixation.

[0004] There is an urgent need for an anti-loosening screw with a self-locking structure to solve the technical defects proposed in the above technology. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-loosening screw with a self-locking structure to solve the problem of poor self-locking effect mentioned in the above background technology.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an anti-loosening screw with a self-locking structure, comprising a screw body, the top end of the screw body is fixedly connected to a screw head, the bottom end of the screw head is installed with a positioning plate, a limiting nut is installed on the outside of the screw body, the bottom end of the limiting nut is provided with a self-locking nut, the bottom end of the self-locking nut is fixedly connected to the limiting plate, the interior of the limiting nut is provided with a first internal thread, the interior of the self-locking nut is provided with a second internal thread, the outside of the screw body is provided with an external thread, the top end of the self-locking nut is fixedly connected to a connecting ring, the interior of the limiting nut is provided with a connecting groove, and a positioning bolt is provided on the positioning plate.

[0007] Preferably, the thread directions of the first internal thread and the second internal thread are opposite, and the self-locking nut is sleeved on the outside of the screw body.

[0008] Preferably, the connecting ring is embedded in the connecting groove and is threadedly connected.

[0009] Preferably, a reserved groove is provided at the top end of the screw head, and the inner diameters of the limiting nut and the self-locking nut are the same.

[0010] Preferably, the top end of the positioning plate is fixedly connected to a mounting insert ring, and the outside of the screw head is fixedly connected to a mounting slot.

[0011] Preferably, the top end of the mounting insert ring can be embedded in the interior of the mounting slot.

[0012] Preferably, three groups of positioning bolts are provided, and the positioning bolts are distributed in a ring shape on the positioning plate.

[0013] Preferably, the limiting plate is sleeved on the outside of the screw body, and a rubber pad is provided on the limiting plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the anti-loosening screw with a self-locking structure not only realizes the function of enhancing the self-locking effect, realizes the function of facilitating positioning, but also realizes the function of facilitating limiting;

[0015] By providing a limiting nut, a self-locking nut, a connecting groove, a first internal thread, a connecting ring and a second internal thread, the limiting nut and the self-locking nut on the outside of the screw body can self-lock and limit the screw body after installation. When the self-locking nut is installed on the outside of the screw body, the self-locking nut needs to be rotated and screwed into the outside of the screw body, the self-locking nut and the screw body are screwed counterclockwise for installation, and the limiting nut and the screw body are screwed clockwise for installation. When the self-locking nut is installed, the connecting ring on the top is screwed into the connecting groove of the limiting nut for fixation. This structure realizes a self-locking structure, prevents the nut from loosening, and improves the stability of the screw installation;

[0016] By providing a mounting insert ring, a screw head, a mounting slot, a positioning plate and a positioning bolt, the positioning plate is first mounted on the screw head before mounting the screw body, the mounting insert ring on the positioning plate is inserted into the interior of the mounting slot, and then the screw body is tightened, and then the positioning bolt on the positioning plate is tightened and installed. The positioning bolt and the positioning plate can position the screw body to prevent it from loosening. This structure realizes the function of facilitating positioning and preventing loosening;

[0017] By providing a screw body, a limiting plate and a limiting nut, when the screw body is used for installation and fixing, the screw body is fixed on the equipment, and then the limiting nut is installed on the outside of the screw body, and then the self-locking nut is installed on the outside of the screw body and the bottom of the limiting nut. The limiting plate on the self-locking nut can limit the position where the screw body passes through. This structure realizes the function of facilitating limitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0019] Figure 2 This is a front view structural diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the top structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the front cross-sectional structure of the self-locking nut of the present invention.

[0022] In the figure: 1. Screw body; 2. Limit plate; 3. Limit nut; 4. External thread; 5. Mounting ring; 6. Screw head; 7. Mounting slot; 8. Positioning plate; 9. Self-locking nut; 10. Connecting groove; 11. First internal thread; 12. Connecting ring; 13. Second internal thread; 14. Positioning bolt; 15. Reserved groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4 , the utility model provides an embodiment: an anti-loosening screw with a self-locking structure, including a screw body 1, the top of the screw body 1 is fixedly connected with a screw head 6, the bottom end of the screw head 6 is installed with a positioning plate 8, a limiting nut 3 is installed on the outside of the screw body 1, the bottom end of the limiting nut 3 is provided with a self-locking nut 9, the bottom end of the self-locking nut 9 is fixedly connected to the limiting plate 2, the interior of the limiting nut 3 is provided with a first internal thread 11, the interior of the self-locking nut 9 is provided with a second internal thread 13, the exterior of the screw body 1 is provided with an external thread 4, the top of the self-locking nut 9 is fixedly connected with a connecting ring 12, the interior of the limiting nut 3 is provided with a connecting groove 10, and a positioning bolt 14 is provided on the positioning plate 8;

[0025] The first internal thread 11 and the second internal thread 13 have opposite thread directions. The self-locking nut 9 is sleeved on the outside of the screw body 1. The connecting ring 12 is embedded in the inside of the connecting groove 10 and is threadedly connected. A reserved groove 15 is provided at the top of the screw head 6. The inner diameters of the limit nut 3 and the self-locking nut 9 are the same.

[0026] Specifically, if Figure 1 and Figure 2 As shown, when the self-locking nut 9 is installed on the outside of the screw body 1, the self-locking nut 9 needs to be rotated and screwed into the outside of the screw body 1. The self-locking nut 9 and the screw body 1 are screwed counterclockwise to install, and the limit nut 3 and the screw body 1 are screwed clockwise to install. When the self-locking nut 9 is installed, the connecting ring 12 on the top is screwed into the connecting groove 10 of the limit nut 3 and fixed. This structure realizes a self-locking structure.

[0027] The top of the positioning plate 8 is fixedly connected to the mounting ring 5, the outside of the screw head 6 is fixedly connected to the mounting slot 7, and the top of the mounting ring 5 can be embedded in the inside of the mounting slot 7;

[0028] Specifically, if Figure 1 and Figure 3 As shown, before installing the screw body 1, the positioning plate 8 is first installed on the screw head 6, and the mounting insert 5 on the positioning plate 8 is inserted into the inside of the mounting slot 7. Then, after tightening the screw body 1, the positioning bolt 14 on the positioning plate 8 is tightened and installed. The positioning bolt 14 and the positioning plate 8 can position the screw body 1 to prevent it from loosening.

[0029] There are three groups of positioning bolts 14, which are distributed in a ring shape on the positioning plate 8. The limiting plate 2 is sleeved on the outside of the screw body 1, and a rubber pad is provided on the limiting plate 2;

[0030] Specifically, if Figure 1 and Figure 4 As shown, the screw body 1 is fixed on the equipment, and then the limit nut 3 is installed on the outside of the screw body 1, and then the self-locking nut 9 is installed on the outside of the screw body 1 and the bottom of the limit nut 3. The limit plate 2 on the self-locking nut 9 can limit the position where the screw body 1 passes through.

[0031] Working principle: When using the utility model, first install the screw body 1 at the specified position, screw the screw body 1 to fix it first, then install the limit nut 3 on the outside of the screw body 1, and then install the self-locking nut 9 on the outside of the screw body 1. When installing the self-locking nut 9 on the outside of the screw body 1, it is necessary to rotate the self-locking nut 9 into the outside of the screw body 1, and screw the self-locking nut 9 and the screw body 1 counterclockwise to install, and the limit nut 3 and the screw body 1 clockwise to install. When the self-locking nut 9 is installed, the connecting ring 12 on the top is screwed in. The connection groove 10 of the limit nut 3 is fixed inside, and the limit plate 2 on the self-locking nut 9 can limit the position where the screw body 1 passes through. Before installing the screw body 1, the positioning plate 8 is first installed on the screw head 6, and the mounting insert 5 on the positioning plate 8 is inserted into the inside of the mounting slot 7. Then, after tightening the screw body 1, the positioning bolt 14 on the positioning plate 8 is tightened and installed. The positioning bolt 14 and the positioning plate 8 can position the screw body 1 to prevent it from loosening. This structure realizes the function of facilitating positioning and preventing loosening, and also realizes the function of self-locking.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An anti-loosening screw with a self-locking structure, comprising a screw body (1), characterized in that: The top of the screw body (1) is fixedly connected to a screw head (6), the bottom of the screw head (6) is installed with a positioning plate (8), the outside of the screw body (1) is installed with a limiting nut (3), the bottom of the limiting nut (3) is provided with a self-locking nut (9), the bottom of the self-locking nut (9) is fixedly connected to the limiting plate (2), the inside of the limiting nut (3) is provided with a first internal thread (11), the inside of the self-locking nut (9) is provided with a second internal thread (13), the outside of the screw body (1) is provided with an external thread (4), the top of the self-locking nut (9) is fixedly connected to a connecting ring (12), the inside of the limiting nut (3) is provided with a connecting groove (10), and a positioning bolt (14) is provided on the positioning plate (8).

2. The anti-loosening screw with a self-locking structure according to claim 1, characterized in that: The thread directions of the first internal thread (11) and the second internal thread (13) are opposite, and the self-locking nut (9) is sleeved on the outside of the screw body (1).

3. The anti-loosening screw with a self-locking structure according to claim 1, characterized in that: The connecting ring (12) is embedded in the interior of the connecting groove (10) and is threadedly connected.

4. The anti-loosening screw with a self-locking structure according to claim 1, characterized in that: A reserved groove (15) is provided at the top end of the screw head (6), and the inner diameters of the limiting nut (3) and the self-locking nut (9) are the same.

5. The anti-loosening screw with a self-locking structure according to claim 1, characterized in that: The top end of the positioning plate (8) is fixedly connected to a mounting insert ring (5), and the outside of the screw head (6) is fixedly connected to a mounting slot (7).

6. The anti-loosening screw with a self-locking structure according to claim 5, characterized in that: The top end of the mounting insert ring (5) can be embedded in the interior of the mounting slot (7).

7. The anti-loosening screw with a self-locking structure according to claim 1, characterized in that: Three groups of positioning bolts (14) are provided, and the positioning bolts (14) are distributed in a ring shape on the positioning plate (8).

8. The anti-loosening screw with a self-locking structure according to claim 1, characterized in that: The limiting plate (2) is sleeved on the outside of the screw body (1), and a rubber pad is provided on the limiting plate (2).

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