Anti-falling screw for automobile

Abstract

The utility model discloses an anti-drop screw for an automobile, which relates to the technical field of automobile parts and comprises a threaded base and a screw component, a threaded hole is arranged at the top of the threaded base, and the threaded base is in threaded connection with the screw component through the threaded hole. Under the normal condition, the elastic clamping sleeve and the elastic clamping ring are in a slightly compressed state, so that continuous outward elastic force is generated, the screw assembly is prevented from loosening and falling off due to vibration and the like, meanwhile, when the auxiliary screw is tightened downwards along the mounting hole, the elastic filler is extruded outwards to be attached to the inner wall of the threaded hole, and the screw assembly is prevented from falling off. The friction force between the screw body and the threaded hole is increased, the effect of preventing the screw body from falling off is achieved, the reliability and safety of connection of automobile parts are improved, and automobile faults and safety accident risks caused by loosening or falling off of the screw are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an anti-falling screw for automobiles. Background Art

[0002] With the development of science and technology and the progress of the times, automobiles have become an indispensable means of transportation. As one of the essential components, automobile screws have been widely used. In the assembly process of automobiles, a large number of screws are used to fix parts. However, the existing screws are prone to loosening or even falling off due to vibration, friction and other reasons during the operation of the automobile. This will not only affect the connection stability of various parts of the automobile, but also may cause serious safety hazards such as part displacement, abnormal noise, and even in extreme cases, key parts will be detached, affecting the normal driving of the car.

[0003] When ordinary threaded screws are subjected to complex working conditions such as vibration, impact and temperature changes during automobile driving for a long time, the friction between the threads will gradually decrease, causing the screws to loosen. At the same time, existing screws do not have an anti-loosening structure designed specifically for the complex vibration environment of automobiles. Although some auxiliary devices such as anti-loosening washers have a certain effect, they still cannot completely guarantee that the screws will not loosen or fall off under long-term use and harsh working conditions of the automobile, and cannot continuously and stably ensure that the screws remain tightened throughout the entire service life of the automobile. To address the above problems, an anti-loosening screw for automobiles is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that when ordinary threaded screws are subjected to complex working conditions such as vibration, impact and temperature changes during automobile driving for a long time, the friction between the threads will gradually decrease, causing the screws to loosen. The utility model proposes an anti-falling screw for automobiles.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: an anti-falling screw for automobiles, comprising a threaded base and a screw assembly, a threaded hole being provided at the top of the threaded base, and the threaded base being threadedly connected to the screw assembly through the threaded hole, and the screw assembly comprising a fixing plate, a hexagonal protrusion, an auxiliary screw and a screw body, the top of the screw body being welded to the bottom of the fixing plate, and an elastic retaining ring being fixedly connected to the outer wall of the bottom end of the screw body, the top of the fixing plate being welded to the bottom of the hexagonal protrusion, a mounting hole being provided at the top of the screw body, the bottom end of the auxiliary screw being threadedly connected to the mounting hole through the hexagonal protrusion, a plurality of connecting holes being symmetrically and evenly provided on the outer wall of the screw body, a semicircular plate being slidably installed inside one end of the connecting hole, and an elastic filler being filled inside the other end of the connecting hole.

[0006] Preferably, a plurality of insert blocks are fixedly connected to the bottom annular array of the fixed plate, and an elastic sleeve is fixedly connected to the outer wall of the insert block.

[0007] Preferably, an annular groove is provided on the top of the threaded base, and one end of the plug-in block is plugged into the annular groove.

[0008] Preferably, a convex plate is welded to the top of the auxiliary screw, and a washer is provided on the bottom outer edge of the fixing plate.

[0009] Preferably, the outer diameter of the elastic clamp is larger than the inner diameter of the threaded hole, and the difference between the outer diameter of the elastic clamp and the inner diameter of the threaded hole is 2 to 4 mm.

[0010] Preferably, the thickness of the elastic ferrule is greater than the width of the annular groove, and the difference between the thickness of the elastic ferrule and the width of the annular groove is 2 to 3 mm.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are:

[0012] 1. In the present invention, by providing an insert and an elastic sleeve, the outer walls of multiple inserts are fixed with elastic sleeves, and the inner wall of the annular groove is provided with multiple uneven friction-increasing grooves, which can increase the friction between the annular groove and the elastic sleeve. The elastic sleeve will fit tightly with the inner wall of the annular groove under the action of its own elastic force, and the thickness of the elastic sleeve is greater than the groove width of the annular groove, so that under normal circumstances, the elastic sleeve is in a slightly compressed state, thereby generating a continuous outward elastic force to prevent the screw assembly from loosening and falling off due to vibration and other reasons. The screw can still maintain good anti-loosening performance under high load, long-term operation and harsh environmental conditions of the automobile, thereby improving the stability of the connection of automobile parts.

[0013] 2. In the utility model, an elastic snap ring and an elastic filler are provided. The elastic snap ring is made of spring steel with a high elastic modulus and good fatigue resistance, ensuring that it can maintain stable elasticity during long-term use. When the screw body is tightened, the elastic snap ring will fit tightly with the inner wall of the threaded hole under the action of its own elastic force. The outer diameter of the elastic snap ring is slightly larger than the inner diameter of the threaded hole, so that under normal circumstances, the elastic snap ring is in a slightly compressed state, thereby generating a continuous outward elastic force to prevent the screw assembly from loosening and falling off due to vibration and the like. At the same time, when the auxiliary screw is tightened downward along the mounting hole, the elastic filler will be squeezed outward and fit against the inner wall of the threaded hole, further filling the tiny gap between the threads on the screw body, increasing the friction between the screw body and the threaded hole, and preventing the screw body from falling off. It can effectively prevent the screw from loosening and falling off under the complex operating environment of the automobile, improve the reliability and safety of the connection of automobile parts, and reduce the risk of automobile failure and safety accidents caused by loosening or falling off of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model provides a three-dimensional structural diagram of an anti-falling screw for automobiles;

[0015] Figure 2 The utility model provides an exploded view of an anti-falling screw for automobiles;

[0016] Figure 3 The utility model provides a front cross-sectional view of an anti-falling screw for automobiles;

[0017] Figure 4 The utility model proposes a kind of anti-falling screw for automobile Figure 3 A magnified detail of point A in the middle.

[0018] Legend: 1. Threaded base; 2. Screw assembly; 3. Threaded hole; 4. Annular groove; 21. Fixing plate; 22. Hexagonal protrusion; 23. Auxiliary screw; 24. Protruding plate; 25. Insert; 26. Elastic sleeve; 27. Screw body; 28. Elastic retaining ring; 29. ​​Mounting hole; 210. Washer; 211. Connecting hole; 212. Semicircular plate; 213. Elastic filler. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: Figure 1 - Figure 4As shown, the utility model provides an anti-falling screw for automobiles, comprising a threaded base 1 and a screw assembly 2. The top of the threaded base 1 is provided with a threaded hole 3, and the threaded base 1 is threadedly connected to the screw assembly 2 through the threaded hole 3. The screw assembly 2 comprises a fixing plate 21, a hexagonal protrusion 22, an auxiliary screw 23 and a screw body 27. The top of the screw body 27 is welded to the bottom of the fixing plate 21, and the outer wall of the bottom end of the screw body 27 is fixedly connected with an elastic snap ring 28. The top of the fixing plate 21 is welded to the bottom of the hexagonal protrusion 22. The bottom is welded, and a mounting hole 29 is provided on the top of the screw body 27. The bottom end of the auxiliary screw 23 passes through the hexagonal protrusion 22 and is threadedly connected to the mounting hole 29. The outer wall of the screw body 27 is symmetrically and evenly provided with multiple connecting holes 211. A semicircular plate 212 is slidably installed inside one end of the connecting hole 211, and the other end of the connecting hole 211 is filled with an elastic filler 213. The outer diameter of the elastic retaining ring 28 is larger than the inner diameter of the threaded hole 3, and the difference between the outer diameter of the elastic retaining ring 28 and the inner diameter of the threaded hole 3 is 2 to 4 mm.

[0022] The following is a detailed description of the specific settings and functions of this embodiment: the elastic snap ring 28 is made of spring steel material with high elastic modulus and good fatigue resistance to ensure that it can maintain stable elasticity during long-term use. The outer diameter of the elastic snap ring 28 is larger than the inner diameter of the threaded hole 3, and the difference between the outer diameter of the elastic snap ring 28 and the inner diameter of the threaded hole 3 is 2 to 4 mm. When the screw body 27 is tightened, the elastic snap ring 28 will fit tightly with the inner wall of the threaded hole 3 under the action of its own elastic force. The outer diameter of the elastic snap ring 28 is slightly larger than the inner diameter of the threaded hole 3, so that under normal circumstances, the elastic snap ring 28 is in a slightly compressed state, thereby generating a continuous outward elastic force to prevent the screw assembly 2 from loosening and falling off due to vibration and other reasons; at the same time, a number of connecting holes distributed along the axial direction are provided between the threads of the screw body 27. 211. These connection holes 211 are filled with high-strength elastic fillers 213 (elastic materials, such as rubber or special engineering plastics, with properties such as high temperature resistance, wear resistance and aging resistance). When the auxiliary screw 23 is tightened downward along the mounting hole 29, the auxiliary screw 23 squeezes the semicircular plate 212 and the elastic filler 213 outward. These elastic fillers 213 will be squeezed outward and fit against the inner wall of the threaded hole 3, further filling the tiny gaps between the threads on the screw body 27, increasing the friction between the screw body 27 and the threaded hole 3, and preventing the screw body 27 from falling off. It can effectively prevent the screws from loosening and falling off in the complex operating environment of the car, improve the reliability and safety of the connection of automobile parts, and reduce the risk of automobile failures and safety accidents caused by loosening or falling off of screws.

[0023] Example 2: Figure 1 - Figure 3As shown, a plurality of plug-ins 25 are fixedly connected to the annular array at the bottom of the fixing plate 21, and an elastic sleeve 26 is fixedly connected to the outer wall of the plug-in block 25. An annular groove 4 is provided at the top of the threaded base 1, and one end of the plug-in block 25 is plugged into the annular groove 4. A convex plate 24 is welded to the top of the auxiliary screw 23. A washer 210 is provided at the bottom outer edge of the fixing plate 21. The thickness of the elastic sleeve 26 is greater than the groove width of the annular groove 4, and the difference between the thickness of the elastic sleeve 26 and the groove width of the annular groove 4 is 2 to 3 mm.

[0024] The effect achieved by the entire embodiment is that the outer walls of multiple plug-ins 25 are fixed with elastic sleeves 26, the thickness of the elastic sleeves 26 is greater than the groove width of the annular groove 4, and the difference between the thickness of the elastic sleeves 26 and the groove width of the annular groove 4 is 2 to 3 mm. The inner wall of the annular groove 4 is provided with multiple uneven friction-increasing grooves, which can increase the friction between the annular groove 4 and the elastic sleeve 26. The elastic sleeve 26 will fit tightly with the inner wall of the annular groove 4 under the action of its own elastic force, and the thickness of the elastic sleeve 26 is greater than the groove width of the annular groove 4, so that under normal circumstances, the elastic sleeve 26 is in a slightly compressed state, thereby generating a continuous outward elastic force to prevent the screw assembly 2 from loosening and falling off due to vibration and other reasons. The screw can still maintain good anti-slip performance under high load, long-term operation and harsh environmental conditions of the automobile, thereby improving the stability of the connection of automobile parts.

[0025] The method of use and working principle of this device: The screw body 27 of the screw assembly 2 is made of high-strength alloy steel as a whole to ensure sufficient mechanical strength. When the screw assembly 2 needs to be installed on the threaded base 1, first place the screw body 27 on the top of the threaded hole 3, align the screw body 27 with the threaded hole 3, and align the multiple inserts 25 with the annular groove 4. The screw body 27 is threadedly installed in the threaded hole 3 from top to bottom, and the multiple inserts 25 are inserted into the annular groove 4 until the screw body 27 is tightened, thereby completing the installation of the screw body 27 and the threaded base 1. Finally, the auxiliary screw 23 is installed downward along the mounting hole 29 until the auxiliary screw 23 is threadedly installed with the mounting hole 29, and the top convex plate 24 of the auxiliary screw 23 is stuck in the top position of the mounting hole 29, thereby completing the installation of this screw assembly 2;

[0026] At this time, the washer 210 is pressed and fixed between the fixing plate 21 and the threaded base 1, and the spring washer 210 is compressed to generate an elastic reaction force, so that the threaded connection can maintain a certain pre-tightening force when it is disturbed by external forces such as vibration. This pre-tightening force will prevent the screw body 27 from rotating and loosening due to vibration, thereby playing an auxiliary anti-slip effect; at the same time, the outer walls of the multiple plug blocks 25 are fixed with elastic sleeves 26, and the inner wall of the annular groove 4 is provided with multiple uneven friction-increasing grooves, which can increase the friction between the annular groove 4 and the elastic sleeve 26. The elastic sleeve 26 will fit tightly with the inner wall of the annular groove 4 under the action of its own elastic force, and the thickness of the elastic sleeve 26 is greater than the groove width of the annular groove 4, so that under normal circumstances, the elastic sleeve 26 is in a slightly compressed state, thereby generating a continuous outward elastic force to prevent the screw assembly 2 from loosening and falling off due to vibration and the like;

[0027] When the screw body 27 is tightened, the elastic snap ring 28 will fit tightly with the inner wall of the threaded hole 3 under the action of its own elastic force. The outer diameter of the elastic snap ring 28 is slightly larger than the inner diameter of the threaded hole 3, so that under normal circumstances, the elastic snap ring 28 is in a slightly compressed state, thereby generating a continuous outward elastic force to prevent the screw assembly 2 from loosening and falling off due to vibration and other reasons; at the same time, when the auxiliary screw 23 is tightened downward along the mounting hole 29, the auxiliary screw 23 squeezes the semicircular plate 212 and the elastic filler 213 outward, and these elastic fillers 213 will be squeezed outward and fit against the inner wall of the threaded hole 3, further filling the tiny gaps between the threads on the screw body 27, increasing the friction between the screw body 27 and the threaded hole 3, and effectively preventing the screw from loosening and falling off.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An anti-drop screw for automobiles, comprising a threaded base (1) and a screw assembly (2), wherein a threaded hole (3) is provided on the top of the threaded base (1), and the threaded base (1) is threadedly connected to the screw assembly (2) through the threaded hole (3), characterized in that: The screw assembly (2) comprises a fixing plate (21), a hexagonal protrusion (22), an auxiliary screw (23) and a screw body (27); the top of the screw body (27) is welded to the bottom of the fixing plate (21), and the outer wall of the bottom end of the screw body (27) is fixedly connected with an elastic retaining ring (28); the top of the fixing plate (21) is welded to the bottom of the hexagonal protrusion (22); a mounting hole (29) is provided at the top of the screw body (27); the bottom end of the auxiliary screw (23) passes through the hexagonal protrusion (22) and is threadedly connected to the mounting hole (29); a plurality of connection holes (211) are symmetrically and evenly provided on the outer wall of the screw body (27); a semicircular plate (212) is slidably installed inside one end of the connection hole (211), and the other end of the connection hole (211) is filled with an elastic filler (213).

2. The anti-drop screw for automobile according to claim 1, characterized in that: A plurality of insert blocks (25) are fixedly connected to the bottom annular array of the fixed plate (21), and an elastic sleeve (26) is fixedly connected to the outer wall of the insert block (25).

3. The anti-drop screw for automobile according to claim 2, characterized in that: An annular groove (4) is provided on the top of the threaded base (1), and one end of the insert (25) is plugged into the annular groove (4).

4. The anti-drop screw for automobile according to claim 1, characterized in that: A convex plate (24) is welded to the top of the auxiliary screw (23), and a washer (210) is provided on the outer edge of the bottom of the fixing plate (21).

5. The anti-drop screw for automobile according to claim 1, characterized in that: The outer diameter of the elastic snap ring (28) is larger than the inner diameter of the threaded hole (3), and the difference between the outer diameter of the elastic snap ring (28) and the inner diameter of the threaded hole (3) is 2 to 4 mm.

6. The anti-drop screw for automobile according to claim 3, characterized in that: The thickness of the elastic sleeve (26) is greater than the width of the annular groove (4), and the difference between the thickness of the elastic sleeve (26) and the width of the annular groove (4) is 2 to 3 mm.

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