CN219587945U - Fastening screw with self-locking structure - Google Patents

Abstract

The utility model relates to the technical field of metal accessories and discloses a fastening screw with a self-locking structure, which comprises a screw main body, wherein a screw jacking block is arranged at the top of the screw main body, a self-locking rod is arranged in the screw main body and the screw jacking block through an inner space which is formed by penetrating, a limiting plate is arranged at the top of the self-locking rod, a pushing cover is arranged at the top of the limiting plate, a rebound groove is formed in the center of the top of the screw jacking block, and a compression spring is arranged at the bottom of the limiting plate. According to the screw self-locking device, the self-locking rod, the pushing cover, the compression spring, the fixing rod and the limiting block are matched, so that the compression spring applies upward pushing force to the self-locking rod after the screw main body is installed, the fixing rod drives the limiting block to synchronously move upwards and contact with the inner wall of the thread groove to generate friction, the stability of the screw main body is improved, meanwhile, the friction of the limiting block can be canceled through rotating and pressing of the screw driver on the cross groove, the screw self-locking device is convenient to install and detach, convenient to use and capable of improving working efficiency.

Description

A fastening screw with self-locking structure

technical field

The utility model relates to the technical field of metal fittings, in particular to a fastening screw with a self-locking structure.

Background technique

The function of the screw is mainly to connect two workpieces together and play a fastening role. The screw is a tool that uses the physical and mathematical principles of the oblique circular rotation and friction of the object to tighten the device parts step by step. Screw is an indispensable industrial necessity in daily life: the tiny screw used in cameras, glasses, clocks, electronics, etc.; the general screw for TV, electrical products, musical instruments, furniture, etc.; Screws and nuts; transportation equipment, airplanes, trams, automobiles, etc. are used together with large and small screws. Screws have important tasks in industry. As long as there is industry on the earth, the function of screws will always be important. Screw is a common invention in people's production and life for thousands of years. According to the application field, it is the largest invention of human beings.

The existing common fastening screws lack the automatic anti-loosening function after installation, and the interior of the thread groove cannot completely fit the fastening screws, which will easily cause the screws to loosen after long-term use, affecting the stability of the connected objects, and easily cause damage to the object, and it is more troublesome to perform anti-loosening treatment after the fastening screw is installed, which reduces work efficiency. It is more troublesome and difficult to maintain later, so the fastening screw lacks a self-locking structure.

Utility model content

(1) Solved technical problems

Aiming at the deficiencies of the prior art, the utility model provides a fastening screw with a self-locking structure, which solves the self-locking problem of the fastening screw after installation.

(2) Technical solution

In order to achieve the above purpose, the utility model is realized through the following technical solutions: a fastening screw with a self-locking structure, including a screw body, the top of the screw body is provided with a screw top block, the screw body and the screw top block A self-locking rod is provided in the internal space through the opening, the top of the self-locking rod is provided with a limit plate, the top of the limit plate is provided with a push cover, and the center of the top of the screw top block is provided with a return The bottom of the limiting plate is provided with a compression spring, the surface of the self-locking rod is provided with several fixed rods, the top of the fixed rod is provided with a limiting block, and the surface of the screw body has a thread groove. A plurality of through holes are opened on the surface of the thread groove.

Optionally, the bottom of the screw body is provided with a screw head.

Optionally, a cross groove is opened at the center of the top of the push cover.

Optionally, the bottom of the compression spring is connected to the bottom of the inner wall of the resilience groove.

Optionally, the cross-sectional shape of the resilience groove is convex.

Optionally, the diameter of the top of the resilience groove is smaller than the diameter of the limiting plate.

Optionally, the diameter of the top of the resilience groove is larger than the diameter of the push cover.

Optionally, friction material is provided on the top of the limiting block.

Optionally, the through hole and the limiting block are adapted to each other, and the limiting block passes through the through hole In summary, the technical effects and advantages of the present utility model:

1. The structure of the utility model is reasonable. After inserting the screwdriver into the cross groove, align the screw main body with the thread groove to be inserted, and then rotate the screwdriver forcefully, the screw head will drive the screw main body into the thread groove. At this time, the cover is pushed due to The force of the screwdriver will squeeze the compression spring, so that the self-locking rod moves downward. At this time, the fixed rod on the surface of the self-locking rod will drive the limit block to move downward synchronously, so that the limit block is lower than the level of the through hole. When the screw body can be directly installed into the threaded hole, it is easy to use; when the screw body is installed, the screwdriver will no longer exert pressure on the push cover, and the compression spring will press the push cover upward due to its own pressure, so that the self-locking lever moves upward. The fixed rod on the surface of the self-locking rod will drive the limit block to move upwards synchronously, so that the limit block protrudes from the level of the through hole, making the friction material contact with the inner wall of the thread groove, increasing the friction between the screw body and the thread groove, and making the screw The fixing is more stable; when the screw body needs to be removed, the screwdriver is pressed again to push the cover to cancel the friction between the friction material and the inner wall of the thread groove.

2. In the utility model, through the cooperative arrangement of the self-locking rod, the push cover, the compression spring, the fixing rod and the limit block, the compression spring exerts an upward driving force on the self-locking rod after the screw body is installed, and the fixed rod drives the limit block Synchronous upward movement, and contact with the inner wall of the thread groove to generate friction, improve the stability of the screw body, and at the same time, the screwdriver rotates and presses the cross groove to cancel the friction of the limit block, which is easy to install and disassemble, easy to use, and improves work efficiency .

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those skilled in the art, other drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the structural representation of the fastening screw with self-locking structure of the utility model;

Fig. 2 is the structural representation of the fastening screw self-locking rod with self-locking structure of the utility model;

Fig. 3 is the side view of the compression spring of the fastening screw with self-locking structure of the utility model under normal state without force;

Fig. 4 is a side view of the compression spring of the fastening screw with self-locking structure of the utility model under force.

In the figure: 1, screw main body; 101, thread groove; 102, through hole; 2, screw top block; 3, self-locking rod; 4, limit plate; 5, push cover; 6, rebound groove; 7, compression Spring; 8, fixed rod; 9, limit block; 10, screw head; 11, cross recess; 12, friction material.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment: Refer to a fastening screw with a self-locking structure shown in Figures 1-4. A fastening screw with a self-locking structure, comprising a screw body 1, a screw top block 2 is provided on the top of the screw body 1, and a self-locking rod 3 is provided in the inner space of the screw body 1 and the screw top block 2 through the open interior space , the top of the self-locking rod 3 is provided with a limit plate 4, the top of the limit plate 4 is provided with a push cover 5, the center of the top of the screw top block 2 is provided with a rebound groove 6, and the bottom of the limit plate 4 is provided with a compression spring 7. Several fixed rods 8 are provided on the surface of the self-locking rod 3, and the top of the fixed rod 8 is provided with a limit block 9. The surface of the screw body 1 has a thread groove 101, and the surface of the thread groove 101 is provided with a plurality of through holes 102.

The bottom of the screw body 1 is provided with a screw head 10, and the center of the top of the push cover 5 is provided with a cross groove 11. The material of the push cover 5 is a magnet, which is convenient for screwdriver adsorption and use. The bottom of the compression spring 7 and the bottom of the inner wall of the rebound groove 6 Connected to each other, the cross-sectional shape of the rebound groove 6 is convex, the diameter of the rebound groove 6 top is less than the diameter of the limit plate 4, and the diameter of the rebound groove 6 top is greater than the diameter of the push cover 5, so that the compression spring 7 will not Push the cover 5 out of the rebound groove 6 completely, and the top of the limit block 9 is provided with a friction material 12. The friction material 12 is not limited here, and can be carbon fiber friction material, carbon-carbon friction material bonding, paper-based friction material, Any friction-enhancing material such as resin coating friction can be used. The through hole 102 and the limiting block 9 are adapted to each other, and the limiting block 9 passes through the through hole 102 .

The practical working principle of this utility model: After inserting the screwdriver into the cross groove 11, align the screw main body 1 with the thread groove to be inserted, and then rotate the screwdriver forcefully, the screw head 10 will drive the screw main body 1 into the thread groove, and then push the cover 5 Owing to being subjected to the force of screwdriver can extrude compression spring 7, make self-locking bar 3 move downwards, now the fixed rod 8 on the surface of self-locking bar 3 can drive stopper 9 to move downward synchronously, make stopper 9 be lower than At this time, the screw body 1 can be directly installed into the threaded hole, which is convenient for use; when the screw body 1 is installed, the screwdriver will no longer apply pressure to the push cover 5, and the compression spring 7 will squeeze upward due to its own pressure Push the cover 5 to make the self-locking rod 3 move upwards. At this time, the fixed rod 8 on the surface of the self-locking rod 3 will drive the limit block 9 to move upward synchronously, so that the limit block 9 protrudes from the level of the through hole 102, so that the friction material 12 Contact with the inner wall of the threaded groove, increase the friction between the screw body 1 and the threaded groove, and make the fixing of the screw more stable; when the screw body 1 needs to be removed, press the screwdriver again to push the cover 5 to cancel the friction material 12 and the threaded groove Friction on the inner wall.

Through the cooperative arrangement of the self-locking rod 3, the push cover 5, the compression spring 7, the fixed rod 8 and the limit block 9, the compression spring 7 exerts an upward driving force on the self-locking rod 3 after the screw body 1 is installed, and the fixed rod 8 drives the limiter. The block 9 moves upward synchronously and contacts with the inner wall of the thread groove to generate friction and improve the stability of the screw body 1. At the same time, the friction of the limit block 9 can be canceled by rotating and pressing the screwdriver on the cross groove 11, which is convenient for installation and disassembly. Easy to use and improve work efficiency.

Finally, it should be noted that: the above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art , it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model, All should be included within the protection scope of the present utility model.

Claims (9)

1. The utility model provides a fastening screw with auto-lock structure, includes screw main part (1), its characterized in that: the top of screw main part (1) is equipped with screw kicking block (2), the inside of screw main part (1) and screw kicking block (2) is equipped with from locking lever (3) through the inner space that link up and offer, the top of auto-lock lever (3) is equipped with limiting plate (4), the top of limiting plate (4) is equipped with promotes lid (5), resilience groove (6) have been seted up to the center department at screw kicking block (2) top, the bottom of limiting plate (4) is equipped with compression spring (7), the surface of auto-lock lever (3) is equipped with a plurality of dead lever (8), the top of dead lever (8) is equipped with stopper (9), the surface of screw main part (1) has thread groove (101), a plurality of through-holes (102) have been seted up on the surface of thread groove (101).

2. The fastening screw with self-locking structure according to claim 1, wherein: the bottom of the screw main body (1) is provided with a screw head (10).

3. The fastening screw with self-locking structure according to claim 1, wherein: a cross groove (11) is formed in the center of the top of the pushing cover (5).

4. The fastening screw with self-locking structure according to claim 1, wherein: the bottom of the compression spring (7) is connected with the bottom of the inner wall of the rebound groove (6).

5. The fastening screw with self-locking structure according to claim 1, wherein: the section of the rebound groove (6) is in a convex shape.

6. The fastening screw with self-locking structure according to claim 1, wherein: the diameter of the top of the rebound groove (6) is smaller than that of the limiting plate (4).

7. The fastening screw with self-locking structure according to claim 1, wherein: the diameter of the top of the rebound groove (6) is larger than that of the pushing cover (5).

8. The fastening screw with self-locking structure according to claim 1, wherein: the top of the limiting block (9) is provided with a friction material (12).

9. The fastening screw with self-locking structure according to claim 1, wherein: the through hole (102) and the limiting block (9) are mutually matched, and the limiting block (9) penetrates through the through hole (102).