A check screw assembly

Abstract

The utility model discloses a kind of anti-loose screw assemblies, including screw and nut, screw includes screw head and screw body, the area of screw head is greater than the area of screw body, the lateral side of screw body is equipped with triangular thread, the lateral side of screw head is equipped with trapezoidal thread or triangular thread, and the thread spacing of screw head is greater than the thread spacing of screw body, nut is thread-connected with the screw head of screw.The structure design of the utility model, when screw is loosened due to vibration, under the action of nut and different pitch thread, an opposite axial force will be generated to prevent screw from loosening, thereby achieving a good anti-loose effect, and it is very suitable for use occasions with high requirements on anti-loose performance.When screw needs to be disassembled, a 6-point inner spanner and a 6-point outer spanner are needed to clamp screw and nut respectively and apply opposite force to separate nut from screw, and then screw is removed, so that screw has detachable function and is convenient for repeated use.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and specifically to an 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 an anti-loosening screw assembly that has a better anti-loosening effect, is easy to disassemble, and is reusable.

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

[0005] An anti-loosening screw assembly includes a screw and a nut. The screw includes a screw head and a screw body. The area of ​​the screw head is larger than the area of ​​the screw body. The screw body has triangular threads on its periphery. The screw head has trapezoidal threads or triangular threads on its periphery. The thread pitch of the screw head is larger than the thread pitch of the screw body. The nut is threadedly connected to the screw head of the screw.

[0006] Furthermore, the screw head is a hexagonal head, and the nut is a hexagonal nut.

[0007] Furthermore, the screw head peripheral threads of the screw have undergone a smooth surface treatment.

[0008] Furthermore, the bottom surface of the nut has several upper locking teeth evenly distributed around its circumference.

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

[0010] Furthermore, the anti-loosening screw assembly also includes a washer, which is fitted onto the screw body and abuts against the nut.

[0011] Furthermore, the top surface of the washer has several lower locking teeth that are evenly distributed around its circumference and are adapted to the upper locking teeth.

[0012] Furthermore, the washer is provided with a mounting groove that matches the nut, and the periphery of the mounting groove is provided with a positioning edge that abuts against the side wall of the nut.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model includes a screw and a nut, wherein the screw head is provided with a trapezoidal thread or a triangular thread on its periphery, and the nut is threadedly connected to the screw head. Through this structural design, when the screw is about to loosen due to vibration, the nut and the threads with different pitches, coupled with the smooth contact surface between the screw and the nut, will generate an opposite axial force to prevent the screw from loosening, 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 taken out. This makes the screw detachable and easy to reuse. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the structure of an anti-loosening screw assembly provided in Embodiment 1 of this utility model;

[0016] Figure 2 This is a structural cross-sectional view of an anti-loosening screw assembly provided in Embodiment 1 of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of an anti-loosening screw assembly provided in Embodiment 2 of this utility model;

[0018] Figure 4 This is a structural cross-sectional view of an anti-loosening screw assembly provided in Embodiment 2 of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of an anti-loosening screw assembly provided in Embodiment 3 of this utility model;

[0020] Figure 6 This is a structural cross-sectional view of an anti-loosening screw assembly provided in Embodiment 3 of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of an anti-loosening screw assembly provided in Embodiment 4 of this utility model;

[0022] Figure 8 This is a structural cross-sectional view of an anti-loosening screw assembly provided in Embodiment 4 of this utility model. Detailed Implementation

[0023] 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.

[0024] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0025] Example 1

[0026] Please see Figure 1 , Figure 2 This embodiment provides an anti-loosening screw assembly, including a screw 1 and a nut 2. The screw 1 includes a screw head 11 and a screw body 12. The area of ​​the screw head 11 is larger than the area of ​​the screw body 12. The screw body 12 has triangular threads on its periphery, and the screw head 11 has trapezoidal threads on its periphery. The thread pitch of the screw head 11 is larger than the thread pitch of the screw body 12. The nut 2 is threadedly connected to the screw head 11 of the screw 1. The threads on the periphery of the screw head 11 of the screw 1 have undergone a smooth surface treatment. This structural design, when the screw 1 is about to loosen due to vibration, generates an opposing axial force under the action of the nut 2 and the threads with different pitches, coupled with the smooth contact surface between the screw 1 and the nut 2, thus preventing the screw 1 from loosening. This achieves a good anti-loosening effect and is very suitable for applications requiring high anti-loosening performance.

[0027] In this embodiment, the screw head 11 of the screw 1 is a hexagonal head, and the nut 2 is a hexagonal nut. When it is necessary to disassemble the screw 1, 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.

[0028] Preferably, the bottom surface of the nut 2 has a plurality of upper locking teeth 21 evenly distributed around its circumference, and these upper locking teeth 21 are concentrically inclined. The locking force of the nut 2 can be further improved by the action of the upper locking teeth 21.

[0029] Example 2

[0030] Please see Figure 3 , Figure 4This embodiment provides an anti-loosening screw assembly, including a screw 1, a nut 2, and a washer 3. The screw 1 includes a screw head 11 and a screw body 12. The area of ​​the screw head 11 is larger than the area of ​​the screw body 12. The screw body 12 is provided with triangular threads on its periphery, and the screw head 11 is provided with trapezoidal threads on its periphery. The thread pitch of the screw head 11 is larger than the thread pitch of the screw body 12. The nut 2 is threadedly connected to the screw head 11 of the screw 1. The threads on the periphery of the screw head 11 of the screw 1 have been smoothed. The washer 3 is fitted on the screw body 12 of the screw 1 and abuts against the nut 2. The bottom surface of the nut 2 has a plurality of upper locking teeth 21 evenly distributed in a circular pattern. The plurality of upper locking teeth 21 are concentrically inclined. The top surface of the washer 3 has a plurality of lower locking teeth 31 evenly distributed in a circular pattern that are adapted to the upper locking teeth 21. This structural design, when screw 1 is about to loosen due to vibration, generates an opposite axial force under the action of nut 2 and threads with different pitches, plus the smooth contact surface between screw 1 and nut 2, thus preventing screw 1 from loosening. This achieves a good anti-loosening effect and is very suitable for applications that require high anti-loosening performance and require washers.

[0031] In this embodiment, the screw head 11 of the screw 1 is a hexagonal head, and the nut 2 is a hexagonal nut. When it is necessary to disassemble the screw 1, 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.

[0032] In this embodiment, the washer 3 is provided with a mounting groove that is adapted to the nut 2, and the periphery of the mounting groove is provided with a positioning edge 32 that abuts against the side wall of the nut 2.

[0033] Example 3

[0034] Please see Figure 5 , Figure 6 This embodiment provides an anti-loosening screw assembly, including a screw 1 and a nut 2. The screw 1 includes a screw head 11 and a screw body 12. The area of ​​the screw head 11 is larger than the area of ​​the screw body 12. The screw body 12 has triangular threads on its circumference, and the screw head 11 also has triangular threads on its circumference. The thread pitch of the screw head 11 is larger than the thread pitch of the screw body 12. The nut 2 is threadedly connected to the screw head 11 of the screw 1. The threads on the circumference of the screw head 11 of the screw 1 have undergone a smooth surface treatment. This structural design, when the screw 1 is about to loosen due to vibration, generates an opposing axial force under the action of the nut 2 and the threads with different pitches, coupled with the smooth contact surface between the screw 1 and the nut 2, thus preventing the screw 1 from loosening. This achieves a good anti-loosening effect and is very suitable for applications requiring high anti-loosening performance.

[0035] In this embodiment, the screw head 11 of the screw 1 is a hexagonal head, and the nut 2 is a hexagonal nut. When it is necessary to disassemble the screw 1, 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.

[0036] Preferably, the bottom surface of the nut 2 has a plurality of upper locking teeth 21 evenly distributed around its circumference, and these upper locking teeth 21 are concentrically inclined. The locking force of the nut 2 can be further improved by the action of the upper locking teeth 21.

[0037] Example 4

[0038] Please see Figure 7 , Figure 8 This embodiment provides an anti-loosening screw assembly, including a screw 1, a nut 2, and a washer 3. The screw 1 includes a screw head 11 and a screw body 12. The area of ​​the screw head 11 is larger than the area of ​​the screw body 12. The screw body 12 is provided with triangular threads on its periphery. The screw head 11 is also provided with triangular threads on its periphery. The thread pitch of the screw head 11 is larger than the thread pitch of the screw body 12. The nut 2 is threadedly connected to the screw head 11 of the screw 1. The threads on the periphery of the screw head 11 of the screw 1 have been smoothed. The washer 3 is fitted onto the screw body 12 of the screw 1 and abuts against the nut 2. The bottom surface of the nut 2 has a plurality of upper locking teeth 21 evenly distributed in a circular pattern. These upper locking teeth 21 are concentrically inclined. The top surface of the washer 3 has a plurality of lower locking teeth 31 evenly distributed in a circular pattern that are adapted to the upper locking teeth 21. This structural design, when screw 1 is about to loosen due to vibration, generates an opposite axial force under the action of nut 2 and threads with different pitches, plus the smooth contact surface between screw 1 and nut 2, thus preventing screw 1 from loosening. This achieves a good anti-loosening effect and is very suitable for applications that require high anti-loosening performance and require washers.

[0039] In this embodiment, the screw head 11 of the screw 1 is a hexagonal head, and the nut 2 is a hexagonal nut. When it is necessary to disassemble the screw 1, 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.

[0040] In this embodiment, the washer 3 is provided with a mounting groove that is adapted to the nut 2, and the periphery of the mounting groove is provided with a positioning edge 32 that abuts against the side wall of the nut 2.

[0041] 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. An anti-loosening screw assembly, comprising a screw and a nut, characterized in that: The screw includes a screw head and a screw body. The area of ​​the screw head is larger than the area of ​​the screw body. The screw body has triangular threads on its periphery. The screw head has trapezoidal threads or triangular threads on its periphery. The thread pitch of the screw head is larger than the thread pitch of the screw body. The nut is threadedly connected to the screw head of the screw.

2. The anti-loosening screw assembly according to claim 1, characterized in that: The screw has a hexagonal head, and the nut has a hexagonal nut.

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

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

6. The anti-loosening screw assembly according to claim 4, characterized in that: The anti-loosening screw assembly also includes a washer that fits onto the screw body and abuts against the nut.

7. The anti-loosening screw assembly according to claim 6, characterized in that: The top surface of the washer has several lower locking teeth that are evenly distributed around its circumference and are adapted to the upper locking teeth.

8. The anti-loosening screw assembly according to claim 6, characterized in that: The washer has a mounting groove that matches the nut, and the periphery of the mounting groove has a positioning edge that abuts against the side wall of the nut.

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