A new type of locking screw assembly

Abstract

The utility model discloses a novel anti -loose screw subassembly, including inside and outside combination's screw and screw cap, the inside of screw cap is equipped with thread groove and elastic gasket installation chamber up and down, the thread groove is the trapezoidal thread groove or triangle thread groove with upper opening, the elastic gasket installation chamber is installed with elastic gasket, the screw includes head and tail, the head area of screw is greater than the tail area, the head periphery of screw is equipped with trapezoidal thread or triangle thread, the tail periphery of screw is equipped with triangle thread, with the thread pitch of head of screw is greater than the thread pitch of tail, the head thread of screw is connected in the thread groove of screw cap, and is in abutment with elastic gasket, the tail of screw is from the bottom of screw cap and is equipped with the out of the elastic gasket. The utility model discloses the anti -loose effect is good, and convenient to dismantle can be used repeatedly.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, specifically to a novel anti-loosening screw assembly. Background Technology

[0002] In various fields, screws are required for fastening and preventing loosening in many situations. However, ordinary screws are prone to loosening under strong vibrations, which can affect the service life of machinery, mechanical safety, and personal safety. Therefore, anti-loosening screws are needed in these situations. Existing anti-loosening screws mainly employ methods such as friction anti-loosening and permanent anti-loosening. Friction anti-loosening uses anti-slip pads, but its anti-loosening effect is not ideal and cannot meet the requirements of applications with high anti-loosening performance. Permanent anti-loosening uses spot welding, riveting, or bonding. Although this method has a good anti-loosening effect, it usually damages the screw during disassembly, making the screw unusable. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new type of anti-loosening screw assembly that has a good anti-loosening effect, is easy to disassemble, and can be reused.

[0004] The technical solution of this utility model is as follows:

[0005] A novel anti-loosening screw assembly includes an inner and outer screw and a nut. The nut has threaded grooves and an elastic washer mounting chamber inside. The threaded grooves are trapezoidal or triangular threaded grooves with an upper opening. An elastic washer is installed in the elastic washer mounting chamber. The screw includes a head and a tail. The head area of ​​the screw is larger than the tail area. The head of the screw has trapezoidal or triangular threads on its periphery, and the tail of the screw has triangular threads on its periphery. The thread pitch of the head of the screw is larger than the thread pitch of the tail. The head of the screw is threaded into the threaded groove of the nut and abuts against the elastic washer. The tail of the screw passes through the elastic washer and protrudes from the bottom of the nut.

[0006] Furthermore, the screw head is an internal hexagon head, and the nut is an external hexagon nut.

[0007] Furthermore, the threads around the head of the screw have been smoothed.

[0008] Furthermore, the bottom of the nut is evenly provided with several locking teeth.

[0009] Furthermore, the locking teeth are arranged concentrically at an angle.

[0010] Compared to existing technologies, the advantages of this utility model are as follows: This utility model consists of an inner and outer combination of a screw and a nut. The nut has threaded grooves and an elastic washer mounting chamber inside. The head of the screw is threaded into the threaded groove of the nut, and an elastic washer is installed in the elastic washer mounting chamber. The tail of the screw passes through the elastic washer and protrudes from the bottom of the nut. This structural design, when the screw is about to loosen due to vibration, under the action of the nut and the threads with different pitches, coupled with the smooth contact surface between the screw and the nut, generates an opposite axial force to prevent the screw from loosening. Furthermore, under the action of the elastic washer, the preload becomes stronger as the force increases, thus achieving a good anti-loosening effect. It is very suitable for applications with high requirements for anti-loosening performance. When it is necessary to disassemble the screw, an internal hex wrench and an external hex wrench are used to clamp the screw and the nut respectively and apply forces in opposite directions to separate the nut from the screw, and then the screw can be removed. This makes the screw detachable and easy to reuse. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A front view of a novel anti-loosening screw assembly provided by this utility model;

[0013] Figure 2 for Figure 1 Cross-sectional view of AA;

[0014] Figure 3 A top view of a novel anti-loosening screw assembly provided by this utility model;

[0015] Figure 4 This is a bottom schematic diagram of a novel anti-loosening screw assembly provided by this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1--Screw 2--Nut

[0018] 3--Elastic gasket 11-head

[0019] 12--Tail end 21--Threaded groove

[0020] 22--Elastic gasket mounting chamber 23--Locking teeth

[0021] 111--Trapezoidal thread; 121--Triangular thread. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0024] Example

[0025] Please see Figures 1-4 This embodiment provides a novel anti-loosening screw assembly, including an inner and outer combination of a screw 1 and a nut 2. The nut 2 has threaded grooves 21 on both the upper and lower sides and an elastic washer mounting chamber 22 inside. In this embodiment, the threaded groove 21 is a trapezoidal threaded groove with an upper opening. In other embodiments, the threaded groove 21 can also be a triangular threaded groove. An elastic washer 3 is installed in the elastic washer mounting chamber 22. The screw 1 includes a head 11 and a tail 12, with the area of ​​the head 11 being larger than the area of ​​the tail 12. The head 11 of the screw 1 is provided with a trapezoidal thread 111 around its periphery. In the embodiment where the thread groove 21 is a triangular thread groove, the head 1 of the screw 1 is provided with a triangular thread around its periphery, and the tail 12 of the screw 1 is provided with a triangular thread 121 around its periphery. The thread pitch of the head 11 of the screw 1 is greater than the thread pitch of the tail 12. The head 11 of the screw 1 is threaded into the thread groove 21 of the nut 2 and abuts against the elastic washer 3. The tail of the screw 1 passes through the elastic washer 3 and exits from the bottom of the nut 2.

[0026] Preferably, the thread on the head 11 of the screw 1 is treated with a smooth surface, which helps to improve the axial force of the screw.

[0027] The structural design of this novel anti-loosening screw assembly is such that when the screw 1 is about to loosen due to vibration, the nut 2 and the threads with different pitches, coupled with the smooth contact surface between the screw 1 and the nut 2, generate an opposite axial force to prevent the screw from loosening. In addition, under the action of the elastic washer 3, the preload will become stronger as the force increases, thus achieving a good anti-loosening effect. It is very suitable for applications with high requirements for anti-loosening performance.

[0028] In this embodiment, the head of the screw 1 is an internal hex head, and the nut 2 is an external hex nut. When it is necessary to disassemble the screw, an internal hex wrench and an external hex wrench are used to clamp the screw 1 and the nut 2 respectively and apply forces in opposite directions to separate the nut 2 from the screw 1. Then the screw 1 can be removed, so that the screw 1 has a detachable function and is easy to reuse.

[0029] Preferably, the bottom of the nut 2 is provided with a plurality of locking teeth 23 evenly distributed around its circumference, and these locking teeth 23 are arranged concentrically and at an incline. The design of the locking teeth 23 helps to improve the locking force of the nut 2 during installation.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel anti-loosening screw assembly, characterized in that: The device includes a screw and a nut with internal and external assembly. The nut has threaded grooves and an elastic washer mounting chamber inside. The threaded grooves are trapezoidal or triangular with an upper opening. An elastic washer is installed in the elastic washer mounting chamber. The screw includes a head and a tail. The head area of ​​the screw is larger than the tail area. The head of the screw has trapezoidal or triangular threads on its periphery, and the tail of the screw has triangular threads on its periphery. The thread pitch of the head of the screw is larger than the thread pitch of the tail. The head of the screw is threaded into the threaded groove of the nut and abuts against the elastic washer. The tail of the screw passes through the elastic washer and protrudes from the bottom of the nut.

2. The novel anti-loosening screw assembly according to claim 1, characterized in that: The screw head is an internal hexagon head, and the nut is an external hexagon nut.

3. The novel anti-loosening screw assembly according to claim 1, characterized in that: The screw head has a smooth surface finish on its peripheral threads.

4. The novel anti-loosening screw assembly according to claim 1, characterized in that: The bottom of the nut has several locking teeth evenly distributed around its circumference.

5. A novel anti-loosening screw assembly according to claim 4, characterized in that: The locking teeth are arranged concentrically at an angle.

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