Internal and external thread self-tapping screw sleeve

Abstract

The utility model discloses a self-tapping screw sleeve with internal and external teeth. The self-tapping screw sleeve comprises a sleeve body, self-tapping outer threads are arranged on the outer cambered surface of the sleeve body, inner threads are arranged on the inner cambered surface of the sleeve body, rotating grooves are formed in the lower end of the sleeve body, cylinders are arranged at the upper ends of the interiors of the rotating grooves, the outer cambered surfaces of the cylinders are rotationally connected with first rotating plates, the outer cambered surfaces of the cylinders are rotationally connected with second rotating plates, and the outer cambered surfaces of the cylinders are movably sleeved with torsional springs respectively. The end, close to the center of the cylinder, of each torsional spring is fixedly connected with the corresponding second rotating plate, the end, away from the center of the cylinder, of each torsional spring is fixedly connected with the corresponding first rotating plate, and the outer arc face of the sleeve body is a conical outer arc face. Friction force between the threaded sleeve and the loose-tooth threaded hole is increased through insertion of the screw, the threaded sleeve is installed more firmly, the threaded sleeve is made of stainless steel bars through machining, and the threaded sleeve has higher strength and precision.

Description

Technical Field

[0001] The utility model relates to the technical field of screw sleeves, in particular to an internal and external thread self-tapping screw sleeve. Background Art

[0002] A threaded sleeve is a mechanical connector, which is a slender threaded rod, usually a cylindrical or cylindrical part with a threaded structure. Its external thread combined with the threaded hole can tightly connect two or more objects together. The threaded sleeve has strong shear resistance and torsion resistance and is often used in machinery and construction and other fields. According to different uses and shapes, the threaded sleeve can be divided into internal threaded sleeves, external threaded sleeves and spline sleeves, etc.; in the prior art, the wire threaded sleeve M16X0.8 is often used to solve the problem of insufficient strength of internal threaded holes on light alloy materials, enhance the product thread strength, and can effectively repair the threads of slipped threaded holes. However, since the thread of the wire threaded sleeve M16X0.8 is an ultra-fine thread, the wire diameter is small, and the texture is soft, it is difficult to install and has a high scrap rate. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an internal and external thread self-drilling screw sleeve. The screw sleeve adopts a conical design, which reduces friction during installation, is more convenient to install, and has a lower scrap rate. The screw sleeve is made of stainless steel rod material through machining. The screw sleeve has higher strength and precision, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an internal and external thread self-tapping screw sleeve, comprising a sleeve body;

[0005] Sleeve body: Its outer arc surface is provided with self-tapping external screw teeth, the inner arc surface of the sleeve body is provided with internal screw teeth, the lower end of the sleeve body is provided with rotation grooves, the inner upper end of the rotation grooves is provided with cylinders, the outer arc surface of the cylinder is rotatably connected with a rotating plate 1, the outer arc surface of the cylinder is rotatably connected with a rotating plate 2, the outer arc surface of the cylinder is movably sleeved with a torsion spring, the end of the torsion spring close to the center of the cylinder is fixedly connected to the rotating plate 2, and the end of the torsion spring away from the center of the cylinder is fixedly connected to the rotating plate 1. The outer arc surface of the sleeve body is a conical outer arc surface, and the screw sleeve adopts a conical design to reduce friction during installation and is more convenient to install. The insertion of the screw rod increases the friction between the screw sleeve and the sliding threaded hole, making the installation of the screw sleeve more secure. The screw sleeve is made of stainless steel bar material through machining, and the screw sleeve has higher strength and precision.

[0006] Furthermore, the side surfaces of the second rotating plate away from the central axis of the sleeve body are provided with rubber pads to increase the friction force on the surface of the second rotating plate.

[0007] Furthermore, the side surfaces of the second rotating plate away from the central axis of the sleeve body are provided with limiting teeth, and the limiting teeth are located in the groove inside the rubber pad to increase the friction between the second rotating plate and the sliding threaded hole.

[0008] Furthermore, the upper surface of the sleeve body is provided with a clamping groove to facilitate the connection between the threaded sleeve and the installation tool.

[0009] Furthermore, the outer diameter of the sleeve gradually decreases from top to bottom, ensuring that the installation tool is connected to the end of the sleeve with a larger diameter.

[0010] Furthermore, the sleeve body is a stainless steel sleeve body, and the screw sleeve has higher strength.

[0011] Furthermore, the edges of the upper and lower surfaces of the sleeve body are both chamfered at 45 degrees, thereby improving the appearance of the screw sleeve.

[0012] Compared with the prior art, the beneficial effects of the utility model are: the internal and external thread self-tapping screw sleeve has the following advantages:

[0013] 1. When in use, insert the end of the sleeve with a smaller diameter into the sliding thread hole, rotate the sleeve continuously, and use the self-tapping external thread to open the thread in the sliding thread hole to achieve the connection between the sleeve and the sliding thread hole. As the sleeve continues to go deeper, the gap between the sleeve and the sliding thread hole gradually decreases, and the friction force continues to increase. The thread sleeve adopts a conical design to reduce friction during installation, making installation more convenient and with a lower scrap rate.

[0014] 2. When the external screw is connected to the internal thread, as the screw continues to penetrate into the sleeve, the screw exerts a downward force on the rotating plate 1, causing the rotating plate 1 to drive the torsion spring to twist. Under the action of the torsion force of the torsion spring, the rotating plate 2 contacts the sliding thread hole, further increasing the friction between the screw sleeve and the sliding thread hole. The insertion of the screw increases the friction between the screw sleeve and the sliding thread hole, making the installation of the screw sleeve more secure.

[0015] 3. The screw sleeve is made of stainless steel bar through machining, and the screw sleeve has higher strength and precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the front view cross section of the overall device of the utility model;

[0018] Figure 3 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0019] In the figure: 1 housing, 2 self-tapping external screw thread, 3 internal screw thread, 4 rotating groove, 5 cylinder, 6 rotating plate 1, 7 rotating plate 2, 8 torsion spring, 9 rubber pad, 10 limiting tooth, 11 slot. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 , this embodiment provides a technical solution: an internal and external thread self-tapping screw sleeve, comprising a sleeve body 1;

[0022] Sleeve body 1: Its outer arc surface is provided with self-tapping external screw teeth 2, and the self-tapping external screw teeth 2 are used to open screw teeth in the sliding thread hole to realize the connection between the sleeve body 1 and the sliding thread hole. The inner arc surface of the sleeve body 1 is provided with internal screw teeth 3 to facilitate the connection between the screw sleeve and the screw. The lower end of the sleeve body 1 is respectively provided with a rotating groove 4, and the upper end of the inner part of the rotating groove 4 is provided with a cylinder 5. The outer arc surface of the cylinder 5 is rotatably connected with a rotating plate 1 6, and the outer arc surface of the cylinder 5 is rotatably connected with a rotating plate 2 7. The outer arc surface of the cylinder 5 is respectively movably sleeved with a torsion spring 8, and the torsion spring 8 is close to the center of the cylinder 5. One end is fixedly connected to the rotating plate 2 7, and the end of the torsion spring 8 away from the center of the cylinder 5 is fixedly connected to the rotating plate 1 6. The outer arc surface of the sleeve 1 is a conical outer arc surface. As the screw rod continues to penetrate into the sleeve 1, the screw rod exerts a downward force on the rotating plate 1 6, pushing the rotating plate 1 6 to rotate around the cylinder 5 as the center. The torsion spring 8 twists to generate a torsion force. Under the action of the torsion of the torsion spring 8, the rotating plate 2 7 rotates around the cylinder 5 as the center, exerting a force on the inner wall of the sliding thread hole of the rotating plate 2 7, further increasing the gap between the screw sleeve and the sliding thread hole. The friction between them makes the installation of the screw sleeve more secure. The sides of the rotating plate 27 away from the central axis of the sleeve body 1 are provided with rubber pads 9 to increase the friction between the rotating plate 27 and the sliding threaded hole. The sides of the rotating plate 27 away from the central axis of the sleeve body 1 are provided with limiting teeth 10. The limiting teeth 10 are located in the groove inside the rubber pad 9. The limiting teeth 10 are inserted into the sliding threaded hole to limit the relative sliding of the rotating plate 27 and the sliding threaded hole. The upper surface of the sleeve body 1 is respectively provided with card grooves 11 to facilitate the connection between the sleeve body 1 and the tool. The outer surface of the sleeve body 1 The diameter gradually decreases from top to bottom, so that the slot 11 is located at the end of the sleeve body 1 with a larger diameter, which is convenient for inserting the end of the sleeve body 1 with a smaller diameter into the sliding thread hole. As the sleeve body 1 continues to go deeper, the gap between the sleeve body 1 and the sliding thread hole gradually decreases, and the friction force continues to increase, making the connection between the screw sleeve and the sliding thread hole more secure. The sleeve body 1 is a stainless steel sleeve body, and the screw sleeve is made of stainless steel rod material through machining. The screw sleeve has higher strength and precision. The edges of the upper and lower surfaces of the sleeve body 1 are both 45-degree chamfered structures, which increases the aesthetics of the screw sleeve.

[0023] The working principle of an internal and external thread self-drilling screw sleeve provided by the utility model is as follows: when in use, the sleeve body 1 is connected with the external tool by using the card slot 11, and the end of the sleeve body 1 with a smaller diameter is inserted into the sliding thread hole, and the sleeve body 1 is continuously rotated, and the self-drilling external thread 2 is used to open the thread in the sliding thread hole to realize the connection between the sleeve body 1 and the sliding thread hole. As the sleeve body 1 continues to go deeper, the gap between the sleeve body 1 and the sliding thread hole gradually decreases, and the friction force continues to increase, making the connection between the screw sleeve and the sliding thread hole more firmly. When the external screw is threadedly connected with the internal thread 3, as the screw continues to go deeper into the sleeve body 1, the screw exerts a downward force on the rotating plate 1 6, pushing the rotating plate 1 6 to rotate around the cylinder 5 as the center, and the torsion spring 8 twists to generate a torsion force. Under the action of the torsion of the torsion spring 8, the rotating plate 2 7 is rotated around the cylinder 5 as the center, until the limiting tooth 10 is inserted into the sliding thread hole, and the rubber pad 9 is deformed, further increasing the friction force between the screw sleeve and the sliding thread hole, making the installation of the screw sleeve more firmly.

[0024] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-tapping screw insert with internal and external threads, characterized in that: It comprises a sleeve body (1); The sleeve body (1) has an outer arc surface provided with a self-tapping external screw thread (2), an inner arc surface of the sleeve body (1) is provided with an internal screw thread (3), a rotating groove (4) is provided at the lower end of the sleeve body (1), a cylinder (5) is provided at the inner upper end of the rotating groove (4), the outer arc surface of the cylinder (5) is rotatably connected to a rotating plate 1 (6), the outer arc surface of the cylinder (5) is rotatably connected to a rotating plate 2 (7), a torsion spring (8) is movably sleeved on the outer arc surface of the cylinder (5), one end of the torsion spring (8) close to the center of the cylinder (5) is fixedly connected to the rotating plate 2 (7), and one end of the torsion spring (8) away from the center of the cylinder (5) is fixedly connected to the rotating plate 1 (6), and the outer arc surface of the sleeve body (1) is a conical outer arc surface.

2. The internal and external thread self-tapping screw insert according to claim 1, characterized in that: The side surfaces of the second rotating plate (7) away from the central axis of the sleeve body (1) are provided with rubber pads (9).

3. The internal and external thread self-tapping screw insert according to claim 2, characterized in that: The side surfaces of the second rotating plate (7) away from the central axis of the sleeve body (1) are provided with limiting teeth (10), and the limiting teeth (10) are located in the groove inside the rubber pad (9).

4. The internal and external thread self-tapping screw insert according to claim 1, characterized in that: The upper surface of the sleeve body (1) is respectively provided with a clamping groove (11).

5. The internal and external thread self-tapping screw insert according to claim 1, characterized in that: The outer diameter of the sleeve body (1) gradually decreases from top to bottom.

6. The internal and external thread self-tapping screw insert according to claim 1, characterized in that: The sleeve (1) is a stainless steel sleeve.

7. The internal and external thread self-tapping screw insert according to claim 1, characterized in that: The edges of the upper and lower surfaces of the sleeve body (1) are both chamfered at 45 degrees.

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