Thread barb structure of anti-slip screw

Abstract

The utility model relates to the technical field of screws, in particular to a thread barb structure of an anti-slip screw, which comprises a screw cap, a screw body and a conical head which are sequentially and coaxially fixed from top to bottom. A barb mechanism is mounted in the mounting groove; an inclined barb is fixed at the front end of the connecting block; when the thread teeth are screwed into an object, due to the inclined design of the barbs, the barbs retract inwards under the action of extrusion force, and the connecting block and the pressing block are driven to retract into the cavity. The design ensures that the barbs cannot hinder the installation process of the screw, so that the screw can be smoothly screwed into an object; after the screw is installed, the barbs return to the original positions under the elastic action of the elastic pieces. Due to the fact that the barbs are inclined and the tail ends of the barbs are sharp, the barbs can effectively prevent the screw from rotating reversely under the limiting effect, and therefore the screw is prevented from loosening due to mechanical vibration or other dynamic load effects. The screw can be effectively prevented from loosening, and the safety and reliability of equipment are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw technical field, concretely is the thread barb structure of anti -skid screw. BACKGROUND

[0002] Screw is a common mechanical fastener, mainly used for connecting two or more objects together. It is usually made of metal materials (such as steel, stainless steel, aluminum alloy, etc.), with threaded structure, by rotating the screw into the connected object, so as to realize the fastening effect. Screw is widely used in building, machinery manufacturing, electronic equipment, furniture assembly and other fields.

[0003] The utility model discloses a stainless steel screw for marine equipment discloses a stainless steel screw for marine equipment, including screw head and dismounting screw tip, the top of screw head is provided with screw slot, screw slot is provided with screw slot opening on both sides, the periphery of screw head is provided with cap, the bottom of screw head is provided with welding protrusion, the bottom of welding protrusion is provided with stainless steel nail rod, the periphery wall of stainless steel nail rod is provided with inclined thread, the bottom of stainless steel nail rod is provided with dismounting screw tip, the top of dismounting screw tip is provided with thread column, the inside of stainless steel nail rod is provided with mounting hole on the top of thread column. Through setting up dismounting screw tip, thread column and mounting hole, the convenient interchanging use function of flat head screw and sharp head screw can be realized, which is beneficial to flexible use during installation and reduces the difficulty of fastener installation.

[0004] Although the stainless steel screw for marine equipment reduces the installation difficulty, the screw still has the following problems in actual use: during the use of the screw, long-term mechanical vibration, dynamic load and environmental factors can easily cause the screw to loosen, thereby affecting the stability of the connection and the safety of the equipment. However, the screw does not have an effective anti-loose structure in design, which further aggravates the severity of the loosening problem. In view of this, we propose the thread barb structure of anti-loose screw. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing the thread barb structure of anti-loose screw to solve the problems in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The thread barb structure of anti-loose screw includes nail cap, nail body and cone head fixed coaxially from top to bottom in sequence.

[0008] The outer wall of the nail body is provided with helical thread teeth, a plurality of notches are formed on the thread teeth and are located on the same vertical axis, and the outer wall of the nail body is also provided with an installation groove in communication with the plurality of notches;

[0009] The installation groove is provided with a fixing strip fixedly connected with the installation groove, a cavity is formed in the rear end surface of the fixing strip, a vertical plate is fixed at the rear end in the cavity, a plurality of elastic sheets are fixed at the front end of the vertical plate, a pressing block is arranged on the front side of each elastic sheet, a connecting block is fixed at the front end of the pressing block, the connecting block passes through the front end surface of the fixing strip and is in sliding connection with the fixing strip, an inclined barb is fixed at the front end of the connecting block, the tip of the barb protrudes outside the notch, and the barb is located at the corresponding notch.

[0010] As a preferred technical scheme of the present application, the size of the installation groove matches the size of the fixing strip, and the depth of the installation groove is one fourth of the diameter of the nail body.

[0011] As a preferred technical scheme of the present application, the number of the elastic sheets is equal to the number of the notches, and the material of the elastic sheets is spring steel.

[0012] As a preferred technical scheme of the present application, the inclination angle of the barb is 20°-45°, and the tip of the barb is away from the screwing direction of the thread teeth.

[0013] As a preferred technical scheme of the present application, the barb and the connecting block are in an integral forming structure, and the surface of the barb is subjected to hardening treatment.

[0014] As a preferred technical scheme of the present application, the nail cap, the nail body and the taper head are in an integral forming structure, and the nail cap, the nail body and the taper head are made of high-strength alloy steel.

[0015] As a preferred technical scheme of the present application, the top of the nail cap is provided with a groove, and the cross section of the groove is in a cross shape.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The barb mechanism is provided: when the thread teeth are screwed into the object, the barb is designed to be inclined, and is retracted under the action of the extrusion force, and drives the connecting block and the pressing block to be retracted into the cavity. This design ensures that the barb does not hinder the installation process of the screw, so that the screw can be smoothly screwed into the object; after the installation of the screw is completed, the barb restores its original position under the elastic action of the elastic sheet. Since the barb is inclined and the tip is sharp, it can effectively prevent the reverse rotation of the screw under the limiting action, thereby preventing the screw from loosening due to mechanical vibration or other dynamic load; this design can effectively prevent the screw from loosening, and improve the safety and reliability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the present application;

[0019] Figure 2 Fig. 2 is a schematic diagram of part of the structure of the present application;

[0020] Figure 3 Fig. 3 is a schematic diagram of the structure of the barb mechanism in the present application;

[0021] Figure 4 Fig. 4 is a sectional view of the structure of the barb mechanism in the present application;

[0022] In the drawings:

[0023] 1, nail body; 10, screw thread; 100, notch; 11, mounting groove;

[0024] 2, nail cap; 20, groove;

[0025] 3, tapered head;

[0026] 4, barb mechanism; 40, fixing strip; 400, cavity; 41, vertical plate; 42, elastic sheet; 43, pressing block; 44, connecting block; 45, barb. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0028] The present embodiment provides a technical solution:

[0029] Please refer to Figures 1-4As shown, the thread barb structure of the anti-loose screw comprises a cap 2, a shank 1 and a tapered head 3 fixed coaxially in sequence from top to bottom; the outer wall of the shank 1 is provided with a spiral thread 10, a plurality of notches 100 are formed on the thread 10, and the plurality of notches 100 are located on the same vertical axis, and the outer wall of the shank 1 is also provided with a mounting groove 11 which is in communication with the plurality of notches 100; the mounting groove 11 is mounted with a barb mechanism 4, the barb mechanism 4 comprises a fixed strip 40 fixedly connected with the mounting groove 11, a cavity 400 is formed on the rear end face of the fixed strip 40, a vertical plate 41 is fixedly arranged in the cavity 400, a plurality of elastic sheets 42 are fixedly arranged on the front end of the vertical plate 41, a pressing block 43 is arranged on the front side of each elastic sheet 42, the pressing block 43 is tightly bonded with a connecting block 44, the connecting block 44 is fixedly arranged on the front end of the pressing block 43, the connecting block 44 penetrates through the front end face of the fixed strip 40 and is slidably connected with the fixed strip 40, an inclined barb 45 is fixedly arranged on the front end of the connecting block 44, the tip of the barb 45 protrudes to the outside of the notch 100, and the barb 45 is located at the corresponding notch 100.

[0030] In the embodiment, the size of the mounting groove 11 matches the size of the fixed strip 40, and the depth of the mounting groove 11 is one fourth of the diameter of the shank 1. This design is conducive to stably installing the fixed strip 40 in the mounting groove 11, and improves the reliability of the overall structure.

[0031] In the embodiment, the number of the elastic sheets 42 is equal to the number of the notches 100, and the material of the elastic sheets 42 is spring steel. This design is conducive to stably abutting the corresponding pressing block 43, and the spring steel material is conducive to providing elastic support for the pressing block 43.

[0032] In the embodiment, the inclination angle of the barb 45 is 20°-45°, and the tip of the barb 45 deviates from the screwing direction of the thread 10. The preferred inclination angle of the barb 45 is 30°, which can effectively prevent the screw from rotating in the opposite direction and significantly improve the anti-loose performance.

[0033] In the embodiment, the barb 45 and the connecting block 44 are an integral structure, and the surface of the barb 45 is subjected to hardening treatment. The integral structure ensures the connection reliability between the barb 45 and the connecting block 44, and this design enhances the durability and wear resistance of the barb 45 and the connecting block 44, prolonging the service life.

[0034] In the embodiment, the cap 2, the shank 1 and the tapered head 3 adopt an integral structure, and the cap 2, the shank 1 and the tapered head 3 are made of high-strength alloy steel. The integral structure increases the connection reliability and stability between the cap 2, the shank 1 and the tapered head 3, and the use of high-strength alloy steel ensures the strength and stability of the overall structure, which is suitable for high-load environments.

[0035] In the embodiment, the top of the nail cap 2 is provided with a groove 20, and the cross-sectional shape of the groove 20 is a cross shape. This design facilitates tool operation, improves installation efficiency, and enhances user experience.

[0036] It should be noted that the cross-sectional shape of the barb 45 in the embodiment is triangular, and the tip of the barb 45 is sharp. The triangular cross-section and sharp tip make the barb 45 more easily penetrate the target material, significantly improve the gripping force and stability, and at the same time, the design makes it difficult for the barb 45 to back off after being screwed in, ensuring that the nail body 1 is firmly fixed and preventing the screw from loosening or falling off.

[0037] In specific use, the user first aligns the nail body 1 with the material and screws it in, and the thread teeth 10 are screwed into the material. At this time, the barb 45 is extruded by the material, and the barb 45 drives the connecting block 44 to move, and the connecting block 44 drives the pressing block 43 to move, and the pressing block 43 compresses the spring 42. At this time, the barb 45 will not hinder the installation process of the screw, so that the screw can be smoothly screwed into the object; when the nail body 1 is installed, the barb 45 returns to its original position under the elastic action of the spring 42, and the nail body 1 cannot be rotated in the opposite direction.

[0038] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. Threaded barb structure for anti-backout screws, characterized in that: The nail cap (2), the nail body (1) and the cone head (3) are coaxially fixed from top to bottom in sequence. The outer wall of the nail body (1) is provided with a spiral thread (10), a plurality of notches (100) are formed on the thread (10), and the plurality of notches (100) are located on the same vertical axis. The mounting groove (11) is provided with a barb mechanism (4), the barb mechanism (4) includes a fixed strip (40) fixedly connected with the mounting groove (11), the rear end face of the fixed strip (40) is provided with a cavity (400), the rear end of the cavity (400) is fixedly provided with a vertical plate (41), the front end of the vertical plate (41) is fixedly provided with a plurality of elastic sheets (42), the front side of the elastic sheet (42) is provided with a pressing block (43), the front end of the pressing block (43) is fixedly provided with a connecting block (44), the connecting block (44) passes through the front end face of the fixed strip (40) and is slidably connected with the fixed strip (40), the front end of the connecting block (44) is fixedly provided with an inclined barb (45), the tail end of the barb (45) protrudes to the outside of the notch (100), and the barb (45) is located at the corresponding notch (100).

2. The thread barb structure of an anti-back-out screw according to claim 1, wherein: The size of the mounting groove (11) matches the size of the fixed strip (40), and the depth of the mounting groove (11) is one fourth of the diameter of the nail body (1).

3. The thread barb structure of an anti-back-out screw according to claim 1, wherein: The number of the elastic sheet (42) is equal to the number of the notch (100), and the material of the elastic sheet (42) is spring steel.

4. The thread barb structure of an anti-back-out screw according to claim 1, wherein: The inclination angle of the barb (45) is 20°-45°, and the tip of the barb (45) is away from the screwing direction of the thread (10).

5. The thread barb structure of an anti-back-out screw according to claim 1, wherein: The barb (45) and the connecting block (44) are an integral structure, and the surface of the barb (45) is hardened.

6. The thread barb structure of an anti-back-out screw according to claim 1, wherein: The nail cap (2), the nail body (1) and the cone head (3) are an integral structure, and the nail cap (2), the nail body (1) and the cone head (3) are made of high-strength alloy steel.

7. The thread barb structure of an anti-back-out screw according to claim 1, wherein: The top of the nail cap (2) is provided with a groove (20), and the cross-sectional shape of the groove (20) is cross-shaped.

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