Shockproof and anti-loose self-tapping screw

Abstract

The utility model relates to the technical field of self-tapping screws, and particularly discloses a shockproof and anti-loose self-tapping screw which comprises a screw head, a screw rod is installed on one side of the surface of the screw head, and the surface of the screw head is connected with a connecting block. A first double-line thread is arranged on the surface of the screw rod in a surrounding mode, a second double-line thread is connected to the surface of the screw rod, one end of the second double-line thread is connected with the first double-line thread, and an assembling groove hole is formed in the screw rod and the screw head in an embedded mode. According to the shockproof and anti-loose self-tapping screw, the first double-line thread and the second double-line thread are arranged, the thread angles of the first double-line thread and the second double-line thread are different, when the shockproof and anti-loose self-tapping screw is screwed into a preformed hole, due to the fact that the contact mode and friction force distribution of the first double-line thread and the second double-line thread are more reasonable, the shockproof and anti-loose self-tapping screw can be smoothly tapped into the preformed hole to form matched threads, and the second double-line thread has a certain retaining torque function after being screwed into the preformed hole; the self-locking requirement is met, the probability of occurrence of phenomena such as screw loose and idling is reduced, the reliability and stability of assembly are improved, and potential safety hazards are reduced.

Description

Technical Field

[0001] This utility model relates to the field of self-tapping screw technology, specifically a shockproof and anti-loosening self-tapping screw. Background Technology

[0002] A screw is a tool that uses the physical and mathematical principles of inclined planes, circular rotation, and friction to gradually fasten objects and machine parts. The primary function of a screw is to connect two workpieces together, providing a fastening effect. Threaded connections are one of the most widely used technologies in traditional manufacturing. Self-tapping screws, also known as quick-thread screws, are quick-installing fasteners made of steel with a galvanized and passivated surface. Self-tapping screws are often used to connect thin metal plates. During connection, a threaded hole is first drilled in the parts to be connected, and then the self-tapping screw is screwed into the threaded hole. This standard structure of self-tapping screws, when used in high-strength automotive applications, has the following disadvantages: it cannot easily tap into the pre-drilled hole to form a mating thread during assembly, easily causing stripping, free spin, and other phenomena, leading to safety hazards. Furthermore, it cannot provide a seal, making it inconvenient to use. Utility Model Content

[0003] The purpose of this utility model is to provide a shockproof and anti-loosening self-tapping screw to solve the problems mentioned in the background art, such as the inability to smoothly tap into the reserved hole to form a mating thread during assembly, which easily leads to stripping, free rotation and other phenomena, resulting in safety hazards, and the inability to seal, making it inconvenient to use.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a shockproof and anti-loosening self-tapping screw, including a screw head, a screw rod installed on one side of the surface of the screw head, and a connecting block connected to the surface of the screw head;

[0005] The screw has a double thread I surrounding its surface and a double thread II connected to its surface. One end of the double thread II is connected to the double thread I. The screw and screw head have an internally embedded assembly groove. The connecting block has a rubber block connected to its surface and a sealing block connected to its outer side.

[0006] Preferably, the cross-section of the screw head is set as a triangular structure, and the screw head is set as a rounded corner structure.

[0007] By adopting the above technical solution and setting the screw head as a rhyming structure, the safety of the device can be improved.

[0008] Preferably, both ends of the screw are provided with anti-reverse grooves, and the end of the screw is designed to be flat-tailed.

[0009] Using the above technical solution, rotate the screw so that the flat end of the screw is inserted into the hole.

[0010] Preferably, the square tooth angle of the first double-threaded thread is 30 degrees, and the square tooth angle of the second double-threaded thread is 60 degrees.

[0011] By adopting the above technical solution, the double-threaded first thread and the double-threaded second thread are set to different lengths, thereby improving the stability of the device.

[0012] Preferably, the screw and the connecting block are symmetrically arranged on both sides of the screw head, the sealing block and the rubber block are both set as arc-shaped structures, and the rubber block is set on the top of the screw head. The rubber block is made of flexible material.

[0013] Using the above technical solution, the rubber block can be bent upwards, causing the rubber block to move the sealing block upwards.

[0014] Preferably, one side of the connecting block is configured with a rounded corner structure, the cross-section of the assembly groove inside the connecting block is configured with a hexagonal structure, and the assembly groove inside the nail head is configured with a conical groove.

[0015] Using the above technical solution, the connecting block is rotated through the assembly slot, which in turn drives the position of the nail head to rotate.

[0016] Preferably, the double-threaded second part is disposed at the bottom of the screw.

[0017] Using the above technical solution, the double-threaded second part is set on one side of the flat tail section at the end of the screw.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the anti-vibration and anti-loosening self-tapping screw:

[0019] 1. Two double-threaded threads, namely thread 1 and thread 2, are provided. The thread angles of the two threads are different. When screwed into the reserved hole, the contact method and friction distribution of the two threads are more reasonable, which helps to smoothly enter the reserved hole and form a mating thread. After being screwed into the reserved hole, thread 2 has a certain anti-reverse torque function, which achieves the self-locking requirement, reduces the probability of stripping, free rotation and other phenomena, improves the reliability and stability of assembly, and reduces potential safety hazards.

[0020] 2. A rubber block and a sealing block are provided. The rubber block and the sealing block can deform to a certain extent to fill the gap between the screw and the mounting hole, thereby playing a sealing role. This solves the problem that traditional self-tapping screws cannot seal and improves the convenience of use. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the rubber block flipping and mounting of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the assembly slot installation of this utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the double-threaded mounting of this utility model;

[0025] Figure 5 This is a schematic diagram of a three-dimensional novel structure for mounting screw heads.

[0026] In the picture: 10. Screw head;

[0027] 20. Screw; 201. Double-threaded screw (first type); 202. Double-threaded screw (second type);

[0028] 30. Connecting block; 301. Assembly slot;

[0029] 40. Rubber block; 401. Sealing block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-5 This utility model provides a technical solution: a shockproof and anti-loosening self-tapping screw, including a screw head 10, a screw 20, a double thread one 201, a double thread two 202, a connecting block 30, an assembly groove 301, a rubber block 40, and a sealing block 401.

[0032] This self-tapping screw can improve the sealing of the device and enhance its installation stability. The specific implementation method is as follows:

[0033] A screw 20 is mounted on one side of the screw head 10, and a connecting block 30 is connected to the surface of the screw head 10. A double-threaded first 201 is arranged around the surface of the screw 20, and a double-threaded second 202 is connected to the surface of the screw 20. One end of the double-threaded second 202 is connected to the double-threaded first 201. An assembly groove 301 is embedded inside the screw 20 and screw head 10. A rubber block 40 is connected to the surface of the connecting block 30, and a sealing block 401 is connected to the outer side of the rubber block 40. The cross-section of the screw head 10 is triangular, and the screw head 10 has a rounded corner structure. Anti-reverse grooves are provided at both ends of the screw 20. The end of the rod 20 is set as a flat tail. The square tooth angle of the double thread 1 201 is 30 degrees, and the square tooth angle of the double thread 2 202 is 60 degrees. The screw 20 and the connecting block 30 are symmetrically arranged on both sides of the screw head 10. The sealing block 401 and the rubber block 40 are both set as arc-shaped structures, and the rubber block 40 is set on the top of the screw head 10. The rubber block 40 is made of flexible material. One side of the connecting block 30 is set as a rounded corner structure. The cross-section of the assembly groove 301 inside the connecting block 30 is set as a hexagonal structure, and the assembly groove 301 inside the screw head 10 is set as a conical groove. The double thread 2 202 is set at the bottom of the screw 20.

[0034] By cold heading, a double-threaded second 202 is formed on the surface of the screw 20, with one end connected to a double-threaded first 201. The square tooth angle of the double-threaded second 202 is 60 degrees, while the square tooth angle of the double-threaded first 201 is 30 degrees. The double-threaded second 202 is located at the bottom of the double-threaded first 201, and the spacing between the double-threaded second 202 and the double-threaded first 201 is the same.

[0035] After production is completed, the rubber block 40 is flipped upwards, causing it to bend upwards. This causes the sealing block 401 to move upwards, preventing it from blocking the screw head 10. The bottom of the screw head 10 is then inserted into the pre-drilled hole, with its flat tail positioned inside. A tool is then inserted into the connecting block 30, which is then inserted into the assembly slot 301, causing the assembly slot 301 to engage with the tool. The tool is then rotated, causing the connecting block 30 to rotate through the assembly slot 301. The connecting block 30 then rotates the screw head 10, which in turn rotates the screw rod 20 towards the mounting surface. The screw rod 20 then rotates the double-threaded second 202 and the double-threaded first 201, creating mating threads between them and the pre-drilled hole. Once the bottom of the screw head 10 is in contact with the mounting surface, the tool is stopped, and the overall position is fixed.

[0036] Working principle: When using this anti-vibration and anti-loosening self-tapping screw, the double-threaded type 202, connecting block 30, assembly groove 301, rubber block 40 and sealing block 401 are set to improve the sealing of the device, improve its installation stability, and increase the overall practicality.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shockproof and anti-loosening self-tapping screw, comprising a screw head (10), wherein a screw rod (20) is mounted on one side of the surface of the screw head (10), and a connecting block (30) is connected to the surface of the screw head (10). Its features are: The surface of the screw (20) is surrounded by a double thread one (201), and the surface of the screw (20) is connected to a double thread two (202). One end of the double thread two (202) is connected to the double thread one (201). The screw (20) and the screw head (10) are internally fitted with an assembly groove (301). The surface of the connecting block (30) is connected to a rubber block (40), and the outer side of the rubber block (40) is connected to a sealing block (401).

2. The anti-vibration and anti-loosening self-tapping screw according to claim 1, characterized in that: The cross-section of the screw head (10) is set as a triangular structure, and the screw head (10) is set as a rounded corner structure.

3. The anti-vibration and anti-loosening self-tapping screw according to claim 1, characterized in that: Both ends of the screw (20) are provided with anti-reverse grooves, and the end of the screw (20) is set as a flat tail.

4. The anti-vibration and anti-loosening self-tapping screw according to claim 1, characterized in that: The square tooth angle of the first double-threaded thread (201) is 30 degrees, and the square tooth angle of the second double-threaded thread (202) is 60 degrees.

5. The anti-vibration and anti-loosening self-tapping screw according to claim 1, characterized in that: The screw (20) and the connecting block (30) are symmetrically arranged on both sides of the screw head (10). The sealing block (401) and the rubber block (40) are both set as arc-shaped structures, and the rubber block (40) is set on the top of the screw head (10). The rubber block (40) is made of flexible material.

6. The anti-vibration and anti-loosening self-tapping screw according to claim 1, characterized in that: The connecting block (30) has a rounded corner structure on one side, the cross-section of the assembly groove (301) inside the connecting block (30) is a hexagonal structure, and the assembly groove (301) inside the nail head (10) is a conical groove.

7. The anti-vibration and anti-loosening self-tapping screw according to claim 1, characterized in that: The double-threaded second (202) is provided at the bottom of the screw (20).

Images