Self-locking threaded screw

Abstract

The utility model discloses a self-locking threaded screw which comprises a screw body and a nut, the outer wall of the screw body is in threaded connection with the inner wall of the nut, a bolt head is fixedly connected to the top end of the screw body, internal threads are arranged on the inner wall of the bottom end of the nut, an inner sleeve is in threaded connection with the inner wall of the internal threads, and a driving mechanism is arranged in the nut. An oblique inserting mechanism is arranged in the screw body, and a self-locking mechanism is arranged on the inner wall of the inner sleeve. By means of the driving mechanism, when the screw body is fixed to an object and then screwed into a nut inwards, the rotating plate moves upwards along with the nut and drives the inserting plate to rotate outwards after making contact with the spur gears and being meshed with the spur gears, the operation is synchronous with nut screwing, operation is easy, and by means of the oblique inserting mechanism, the operation efficiency is improved. The set of inserting plates are driven by the rotating shaft to rotate outwards at the same time, so that the screw body and a to-be-fixed object are connected and fixed, self-locking of the screw is not limited to locking of the screw and a nut, and the stability between the device and the object is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of self-locking screws, in particular to a self-locking threaded screw. Background Art

[0002] A threaded screw is a mechanical part with either an internal or external thread. It is generally used as a fastener to facilitate the combination of multiple components. The most common components are screws, nuts and bolts.

[0003] A search revealed Chinese patent number CN101988540A, which discloses a self-locking screw and nut that prevents loosening and slipping. The device features four equally spaced, sloped grooves on the screw, with one or more sloped grooves optionally provided to allow for self-locking of the nut's movable iron plate. However, this patent suffers from the following drawbacks: While the device features grooves on the screw surface to secure the nut to the screw, the screw itself lacks a self-locking function. Even when the screw and nut are securely fastened, the screw and the object can become loose, hindering its use. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a self-locking thread screw.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A self-locking threaded screw comprises a screw body and a nut. The outer wall of the screw body is threadedly connected to the inner wall of the nut. The top of the screw body is fixedly connected to a bolt head. The inner wall of the bottom end of the nut is provided with an internal thread. The inner wall of the internal thread is threadedly connected to an inner sleeve. A driving mechanism is provided inside the nut, an oblique insertion mechanism is provided inside the screw body, and a self-locking mechanism is provided on the inner wall of the inner sleeve.

[0007] Preferably, the driving mechanism is a rotating plate, with limiting protrusions fixedly connected on both sides of the rotating plate, a group of limiting protrusions fixedly connected on both sides are connected with connecting rods, a group of connecting rods are respectively connected to the inner wall of the nut at both ends, and a group of tooth plates are provided on the top of the rotating plate.

[0008] Preferably, the oblique insertion mechanism is a group of inserting plates, a cylindrical hole is opened inside the screw body, a group of side grooves are provided on both sides of the cylindrical hole, a group of rotating shafts are rotatably connected to the inner wall of the cylindrical hole, a group of inserting plates are fixedly connected to the bottom of a group of rotating shafts, a group of spur gears are fixedly connected to the outer walls of both ends of the rotating shafts, and a group of spur gears are located on both sides of the inserting plates.

[0009] Preferably, the plurality of spur gears are respectively engaged with a set of tooth plates, and a set of inserting plates can be rotated out of a set of side grooves.

[0010] Preferably, the self-locking mechanism is a plurality of first elastic sheets and a group of second elastic sheets. The plurality of first elastic sheets are located in a circular array on the inner wall of the front end of the inner sleeve. Grooves are evenly opened on the outer wall of the screw body. The other end of the first elastic sheet is deformed and engaged with the groove.

[0011] Preferably, the outer side of a group of second elastic sheets is fixedly connected to the inner wall of the bottom end of the inner sleeve, and the other side of the second elastic sheet is deformed and then snap-fitted to the outer wall of the screw body.

[0012] Preferably, a plurality of anti-slip bumps are evenly arranged on the outer wall of the inner sleeve.

[0013] The beneficial effects of the utility model are:

[0014] 1. Through the provided driving mechanism, when the screw body is fixed to the object and the nut is screwed inward, the rotating plate moves upward with the nut under the restraining action of a set of limiting protrusions and side grooves. After contacting and engaging with multiple spur gears, it drives the insert plate to rotate outward. This operation is synchronized with the tightening of the nut and is easy to operate.

[0015] 2. Through the inclined insertion mechanism, a group of insert plates are simultaneously rotated outwards under the drive of the rotating shaft, so that the screw body and the object to be fixed are connected and fixed. The self-locking function of the screw is not limited to the locking of the screw and the nut, which enhances the stability between the device and the object. At the same time, it is easy to disassemble without destroying the screw body, making the device reusable.

[0016] 3. Through the self-locking mechanism, after the screw body and the object to be fixed, and the screw body and the nut are fixed, when the screw and the object become loose and the screw body or the nut retreats, multiple first elastic sheets are deformed so that their tails are raised and engage with the grooves on the outer wall of the screw body, thereby achieving self-locking. At the same time, a group of second elastic sheets are deformed when the nut is screwed up. If the nut is downward relative to the screw body, the second elastic sheets engage with the outer wall of the screw body and achieve self-locking again. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall structure of a proposed self-locking thread screw;

[0018] Figure 2 An exploded view of a nut of a proposed self-locking threaded screw;

[0019] Figure 3 An exploded view of the screw and nut of a proposed self-locking thread screw;

[0020] Figure 4 Schematic diagram of the cross-sectional structure of a proposed self-locking thread screw.

[0021] In the accompanying drawings: 1. Screw body; 2. Bolt head; 3. Nut; 4. Cylindrical hole; 5. Side groove; 6. Rotating plate; 7. Limiting protrusion; 8. Connecting rod; 9. Tooth plate; 10. Rotating shaft; 11. Insert plate; 12. Spur gear; 13. Internal thread; 14. Inner sleeve; 15. First elastic sheet; 16. Groove; 17. Second elastic sheet; 18. Anti-slip protrusion. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0024] Reference Figure 1-4 A self-locking threaded screw comprises a screw body 1 and a nut 3. The outer wall of the screw body 1 is threadedly connected to the inner wall of the nut 3. The top of the screw body 1 is fixedly connected to the bolt head 2. The inner wall of the bottom end of the nut 3 is provided with an internal thread 13. The inner wall of the internal thread 13 is threadedly connected to the inner sleeve 14. A driving mechanism is provided inside the nut 3, an oblique insertion mechanism is provided inside the screw body 1, and a self-locking mechanism is provided on the inner wall of the inner sleeve 14.

[0025] At the same time, the driving mechanism is a rotating plate 6, and the limiting protrusions 7 are fixedly connected on both sides of the rotating plate 6. A group of limiting protrusions 7 are fixedly connected on both sides with connecting rods 8. The two ends of a group of connecting rods 8 are respectively rotatably connected to the inner wall of the nut 3. A group of tooth plates 9 are provided on the top of the rotating plate 6. The rotating plate 6 moves upward with the nut 3, and drives the inserting plate 11 to rotate outward after contacting and engaging with multiple spur gears 12. This operation is synchronized with tightening the nut and is simple to operate.

[0026] The oblique insertion mechanism is a group of inserting plates 11, a cylindrical hole 4 is opened inside the screw body 1, and a group of side grooves 5 are provided on both sides of the cylindrical hole 4. A group of rotating shafts 10 are rotatably connected to the inner wall of the cylindrical hole 4, and a group of inserting plate bottoms 11 are fixedly connected to a group of rotating shafts 10. A group of spur gears 12 are fixedly connected to the outer walls of both ends of the rotating shaft 10. A group of spur gears 12 are located on both sides of the inserting plates 11. Multiple spur gears 12 are respectively engaged with a group of tooth plates 9. A group of inserting plates 11 can be unscrewed from a group of side grooves 5, so that there is a connection and fixation between the screw body 1 and the object to be fixed, so that the self-locking of the screw body 1 is not limited to the locking of the screw body 1 and the nut 3, thereby enhancing the stability between the device and the object.

[0027] The self-locking mechanism consists of a plurality of first elastic pieces 15 and a group of second elastic pieces 17. The plurality of first elastic pieces 15 are located in a circular array on the inner wall of the front end of the inner sleeve 14. Grooves 16 are evenly provided on the outer wall of the screw body 1. The other end of the first elastic piece 15 is deformed and engaged with the groove 16. The outer side of a group of second elastic pieces 17 is fixedly connected to the inner wall of the bottom end of the inner sleeve 14. The other side of the second elastic piece 17 is deformed and engaged with the outer wall of the screw body 1. The first elastic piece 15 is deformed so that its tail is tilted up and is engaged with the groove 16 on the outer wall of the screw body 1, which can be self-locking. The second elastic piece 17 has been deformed when the nut 3 is rotated upward. If the nut 3 is downward relative to the screw body 1, the second elastic piece 17 is engaged with the outer wall of the screw body 1 and is self-locking again.

[0028] The outer wall of the inner sleeve 14 is evenly provided with a plurality of anti-slip bumps 18 to facilitate manual holding or tool clamping.

[0029] Working principle: When in use, the inner sleeve 14 and the nut 3 are rotated and fixed, and the screw body 1 is put into the surface of the object to be fixed to complete the fixation. The nut 3 is screwed upward from the bottom end of the screw body 1 using the internal thread 13. The rotating plate 6 moves upward with the nut 3 under the limiting action of a group of limiting protrusions 7 and the side grooves 5. After contacting and engaging with multiple spur gears 12, it drives a group of inserting plates 11 to rotate outward from a group of side grooves 5, so that there is a connection and fixation between the screw body 1 and the object to be fixed, thereby enhancing the stability between the screw body 1 and the object. At the same time, a group of second elastic sheets 17 are deformed on the inside when they rotate upward with the nut 3. When After the screw body 1 and the object to be fixed, and the screw body 1 and the nut 3 are fixed, when the screw body 1 and the object become loose, if the screw body 1 or the nut 3 retreats backward, the multiple first elastic pieces 15 are deformed so that their tails are tilted up, and they are engaged with the grooves 16 on the outer wall of the screw body 1, which can be self-locked. At the same time, the nut 3 is downward relative to the screw body 1, and the second elastic piece 17 is engaged with the outer wall of the screw body 1, and self-locking is performed again, thereby enhancing the stability of the device. If the device needs to be disassembled, it only needs to destroy the inner sleeve 14 to complete the disassembly while the nut 3 and the screw body 1 are intact.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A self-locking threaded screw, comprising a screw body (1) and a nut (3), characterized in that: The outer wall of the screw body (1) is threadedly connected to the inner wall of the nut (3); the top of the screw body (1) is fixedly connected to the bolt head (2); the inner wall of the bottom end of the nut (3) is provided with an internal thread (13); the inner wall of the internal thread (13) is threadedly connected to the inner sleeve (14); a driving mechanism is provided inside the nut (3); an oblique insertion mechanism is provided inside the screw body (1); and a self-locking mechanism is provided on the inner wall of the inner sleeve (14).

2. A self-locking threaded screw according to claim 1, characterized in that: The driving mechanism is a rotating plate (6), with limiting protrusions (7) fixedly connected on both sides of the rotating plate (6), a set of limiting protrusions (7) fixedly connected on both sides with connecting rods (8), and both ends of a set of connecting rods (8) are respectively rotatably connected to the inner wall of the nut (3), and a set of tooth plates (9) are provided on the top of the rotating plate (6).

3. A self-locking threaded screw according to claim 1, characterized in that: The oblique insertion mechanism comprises a group of inserting plates (11), a cylindrical hole (4) is provided inside the screw body (1), a group of side grooves (5) are provided on both sides of the cylindrical hole (4), a group of rotating shafts (10) are rotatably connected to the inner wall of the cylindrical hole (4), a group of inserting plates (11) are fixedly connected to the group of rotating shafts (10) at the bottom, a group of spur gears (12) are fixedly connected to the outer walls of both ends of the rotating shafts (10), and a group of spur gears (12) are located on both sides of the inserting plates (11).

4. A self-locking threaded screw according to claim 3, characterized in that: The plurality of spur gears (12) are respectively engaged with a group of tooth plates (9), and a group of inserting plates (11) can be rotated out from a group of side grooves (5).

5. A self-locking threaded screw according to claim 1, characterized in that: The self-locking mechanism comprises a plurality of first elastic sheets (15) and a group of second elastic sheets (17). The plurality of first elastic sheets (15) are arranged in a circular array on the inner wall of the front end of the inner sleeve (14). Grooves (16) are evenly formed on the outer wall of the screw body (1). The other end of the first elastic sheet (15) is deformed and engaged with the groove (16).

6. A self-locking threaded screw according to claim 5, characterized in that: The outer sides of a group of the second elastic sheets (17) are fixedly connected to the inner wall of the bottom end of the inner sleeve (14), and the other side of the second elastic sheet (17) is deformed and then snap-fitted to the outer wall of the screw body (1).

7. A self-locking threaded screw according to claim 1, characterized in that: The outer wall of the inner sleeve (14) is evenly provided with a plurality of anti-slip bumps (18).

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