Anti-falling wire thread insert

Abstract

The utility model relates to the technical field of steel wire thread insert nets, in particular to an anti-falling steel wire thread insert which comprises a thread insert body, and friction sliding grooves are formed in the two sides of the thread insert body. When the screw is screwed into the screw sleeve main body and the fastening friction sleeve, the sliding friction blocks are firstly extruded in each layer, and the sliding friction blocks slide in the limiting sliding grooves through the limiting sliding blocks, move in the friction sliding grooves and are arranged between the inner walls of the screw holes and the screw taps, so that additional friction force is increased through the external friction layers; the nut abuts against the top friction layer arranged on the surface of the friction piece, and the friction piece at the bottom end makes contact with the bottom of the screw hole to prevent the thread sleeve screw from sliding.

Description

Technical Field

[0001] The utility model relates to the technical field of wire screw sleeve nets, in particular to an anti-falling wire screw sleeve. Background Art

[0002] Wire thread insert is a new type of threaded fastener. It is a spring-shaped concentric body with internal and external threads, which is precisely processed from high-strength, high-precision, smooth-surfaced stainless steel wire with a diamond cross-section. Its shape is similar to a coil spring, with high hardness and good surface roughness. When using the wire thread insert, a wire thread insert installation tool is required to screw the wire thread insert into and tighten it into the threaded hole of one of the connected parts to protect the internal thread and improve the connection strength between the connected parts. The wire thread insert is embedded in the threaded holes of low-strength engineering materials such as aluminum, magnesium alloy, cast iron, fiberglass, and plastic. It has high connection strength, and is resistant to shock, impact, and wear. It can disperse stress to protect the base thread and greatly extend the service life of the base.

[0003] Publication number CN220600204U discloses an anti-falling wire screw insert, which uses the elasticity of an elastic pad to squeeze a protrusion so that the protrusion fits into a threaded hole in a connector. The anti-slip strip increases friction with the threaded hole to prevent the wire screw body from loosening and falling off, thereby improving the connection strength between the connectors. After the wire screw insert is screwed into the threaded hole of one of the connectors, the mounting handle is rotated outward so that the mounting handle is separated from the interior of the connector, making it easier to install and remove the mounting handle and preventing the wire screw insert from loosening due to external force cutting off the mounting handle. The screw insert can be recycled. However, during use, the screw hole, the screw insert and the screw are tightened by friction stress. After long-term use, the screw hole opened by different materials will increase in diameter due to temperature, humidity and self-wear, causing the screw insert to loosen, affecting the screw tightening effect. To this end, we propose an anti-falling wire screw insert. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides an anti-falling wire screw sleeve.

[0005] The technical solution adopted by the utility model to solve its technical problems is an anti-falling wire screw sleeve, which includes a screw sleeve main body, friction grooves on both sides of the screw sleeve main body, and limiting grooves at the bottom and top ends of the friction grooves. The interior of the limiting groove is slidably connected to a sliding friction block, and the top and bottom ends of the sliding friction block are fixedly connected to a limiting slider.

[0006] By adopting the above technical solution, the screw sleeve body and the fastening friction sleeve are first placed inside the screw hole, and the sliding friction block slides into the friction groove under the extrusion of the inner wall of the screw hole. Then the screw is screwed into the screw sleeve body and the fastening friction sleeve. First, each layer squeezes the sliding friction block, and the sliding friction block slides inside the friction groove through the limiting slider. It is placed between the inner wall of the screw hole and the screw tapping, thereby increasing additional friction through the external friction layer. When the screw is screwed to the end, the nut abuts against the top friction layer set on the surface of the friction part, and the friction part at the bottom contacts the bottom of the screw hole to prevent the screw sleeve from slipping.

[0007] Specifically, the top and bottom ends of the screw sleeve body are fixedly connected to a fastening friction sleeve, and the top end of the fastening friction sleeve is fixedly connected to a plurality of friction members distributed at equal distances.

[0008] By adopting the above technical solution, the friction member on the surface of the fastening friction sleeve is brought into contact with the bottom end of the screw hole and the nut on the surface of the screw, thereby achieving the purpose of increasing friction.

[0009] Specifically, a top friction layer is provided on the surface of the friction member.

[0010] By adopting the above technical solution, the bottom of the screw hole and the nut are contacted through the top friction layer, thereby increasing the friction between the three.

[0011] Specifically, an external friction layer is fixedly connected to the outer wall surface of the limiting sliding block.

[0012] By adopting the above technical solution, the friction force is increased by the contact between the external friction layer and the inner wall of the screw hole.

[0013] Specifically, a multi-layer screw sleeve body is fixedly connected between the fastening friction sleeves at both ends.

[0014] By adopting the above technical solution, by fastening the multi-layer screw sleeve body between the friction sleeves at both ends, each layer of the screw sleeve body can slide out of the friction block and squeeze the inner wall of the screw hole when the screw is screwed in.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The technical solution of the present application is to place the screw sleeve body and the fastening friction sleeve into the screw hole, and the sliding friction block slides into the friction groove under the extrusion of the inner wall of the screw hole, and then the screw is screwed into the screw sleeve body and the fastening friction sleeve. First, each layer squeezes the sliding friction block, and the sliding friction block slides in the friction groove through the limiting slider and is placed between the inner wall of the screw hole and the screw tapping to increase additional friction through the external friction layer. When the screw is screwed to the end, the nut abuts against the top friction layer set on the surface of the friction part, and the friction part at the bottom contacts the bottom of the screw hole to prevent the screw sleeve from slipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is an axonometric drawing of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the screw sleeve body and the sliding friction block of the utility model;

[0020] Figure 3 This is a structural diagram of the fastening friction sleeve of the utility model;

[0021] In the figure: 1. Screw sleeve body; 2. Friction slide; 3. Limit slide; 4. Sliding friction block; 5. Limit slider; 6. External friction layer; 7. Fastening friction sleeve; 8. Friction part; 9. Top friction layer. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figure 1-3 The embodiment of the utility model provides a technical solution: an anti-falling wire screw sleeve, comprising a screw sleeve body 1, friction grooves 2 are provided on both sides of the screw sleeve body 1, and limiting grooves 3 are provided at the bottom and top of the friction grooves 2. A sliding friction block 4 is slidably connected inside the limiting groove 3, and the top and bottom of the sliding friction block 4 are fixedly connected to a limiting slider 5.

[0024] When in use, first place the screw sleeve body 1 and the fastening friction sleeve 7 into the screw hole, and the sliding friction block 4 slides into the friction groove 2 under the extrusion of the inner wall of the screw hole, and then screw the screw into the screw sleeve body 1 and the fastening friction sleeve 7. First, squeeze the sliding friction block 4 in each layer, and the sliding friction block 4 slides in the friction groove 2 in the limiting groove 3 through the limiting slider 5, and is placed between the inner wall of the screw hole and the screw tapping, thereby increasing additional friction through the external friction layer 6. When the screw is screwed to the end, the nut abuts against the top friction layer 9 set on the surface of the friction part 8, and the friction part 8 at the bottom end contacts the bottom of the screw hole to prevent the screw sleeve from slipping.

[0025] As shown in the figure, the top and bottom ends of the screw sleeve body 1 are fixedly connected to a fastening friction sleeve 7, and the top end of the fastening friction sleeve 7 is fixedly connected to a plurality of friction members 8 distributed at equal distances.

[0026] When in use, the friction member 8 on the surface of the tightening friction sleeve 7 is brought into contact with the bottom end of the screw hole and the nut on the surface of the screw, thereby achieving the purpose of increasing friction.

[0027] As shown in the figure, a top friction layer 9 is provided on the surface of the friction member 8 .

[0028] When in use, the top friction layer 9 contacts the bottom of the screw hole and the nut, thereby increasing the friction between the three.

[0029] As shown in the figure, an external friction layer 6 is fixedly connected to the outer wall surface of the limiting sliding block 5.

[0030] When in use, the friction force is increased by the outer friction layer 6 contacting the inner wall of the screw hole.

[0031] As shown in the figure, a multi-layer screw sleeve body 1 is fixedly connected between the fastening friction sleeves 7 at both ends.

[0032] During use, by fastening the multi-layer screw sleeve body 1 between the friction sleeves 7 at both ends, each layer of the screw sleeve body 1 can slide out of the friction block and squeeze the inner wall of the screw hole when the screw is screwed in.

[0033] The working principle and usage process of the utility model are as follows: first, the screw sleeve body 1 and the fastening friction sleeve 7 are placed inside the screw hole, and the sliding friction block 4 slides into the friction groove 2 under the extrusion of the inner wall of the screw hole, and then the screw is screwed into the screw sleeve body 1 and the fastening friction sleeve 7. First, each layer squeezes the sliding friction block 4, and the sliding friction block 4 slides inside the friction groove 2 in the limiting groove 3 through the limiting slider 5, and is placed between the inner wall of the screw hole and the screw tapping, thereby increasing additional friction through the external friction layer 6. When the screw is screwed to the end, the nut abuts against the top friction layer 9 set on the surface of the friction member 8, and the friction member 8 at the bottom end contacts the bottom of the screw hole to prevent the screw sleeve from slipping.

[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 the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-falling wire thread insert, characterized in that: The invention comprises a screw sleeve body (1), friction grooves (2) are provided on both sides of the screw sleeve body (1), limiting grooves (3) are provided at the bottom and top of the friction groove (2), a sliding friction block (4) is slidably connected inside the limiting groove (3), and the top and bottom of the sliding friction block (4) are fixedly connected to a limiting slider (5).

2. The anti-falling wire thread insert according to claim 1, characterized in that: The top and bottom ends of the screw sleeve body (1) are both fixedly connected to a fastening friction sleeve (7), and the top end of the fastening friction sleeve (7) is fixedly connected to a plurality of friction members (8) distributed at equal distances.

3. The anti-falling wire thread insert according to claim 2, characterized in that: A top friction layer (9) is provided on the surface of the friction member (8).

4. The anti-falling wire thread insert according to claim 1, characterized in that: An external friction layer (6) is fixedly connected to the outer wall surface of the limiting sliding block (5).

5. The anti-falling wire thread insert according to claim 2, characterized in that: A multi-layer screw sleeve body (1) is fixedly connected between the fastening friction sleeves (7) at both ends.

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