Nut fastening assembly

Abstract

The utility model relates to a nut fastening assembly which comprises a first nut and a second nut, the thread directions of the first nut and the second nut are the same, the first nut is located above the second nut and coaxially arranged, the bottom face of the first nut is provided with a first contact face, and the top face of the second nut is provided with a second contact face abutting against the first contact face. The first contact face and the second contact face are both spiral faces and are arranged on the end faces of the two nuts, the rotation axis of the spiral faces is coaxial with the axis of the first nut and the axis of the second nut, threads of the first nut and threads of the second nut extend to the inner sides of the spiral faces, and a vertical plane is arranged between the low position and the high position of each spiral face. A hollow part is formed between the vertical planes of the first contact surface and the second contact surface, and a fixing piece is arranged in the hollow part. According to the nut fastening assembly, the locking stability of the nut can be improved, and the loosening risk when the nut is vibrated is reduced; in addition, the structure is simple, and machining and manufacturing are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of nuts, in particular to a nut fastening assembly. Background Art

[0002] A nut is a fastener that is screwed onto a bolt or screw. Nuts and bolts of equal specifications can only be connected together through their internal threads. For example, patent publication number CN211231234U discloses a vibration-resistant nut. This nut is designed to provide vibration resistance through the coordinated use of a retaining groove, a storage groove, a positioning socket, a retaining block, a spring ring, a plug, and a retaining connecting ring. However, this technical solution incorporates numerous structures and components within the nut, resulting in a complex structure that is difficult to manufacture for smaller nuts. Utility Model Content

[0003] In order to solve the problems of the prior art, the utility model provides a nut fastening assembly which has a simple structure, is easy to process the nut, and is effectively shock-resistant.

[0004] The specific technical solution is as follows: A nut fastening assembly includes a first nut and a second nut, the thread directions of the first and second nuts are the same, the first nut is located above the second nut and is coaxially arranged, the bottom surface of the first nut is provided with a first contact surface, and the top surface of the second nut is provided with a second contact surface abutting against the first contact surface, the first contact surface and the second contact surface are both helical surfaces and are arranged on the end faces of the two nuts, the rotation axis of the helical surface is coaxial with the axis of the first and second nuts, the threads of the first and second nuts extend to the inner side of the helical surface, and there is a vertical plane between the low position and the high position of the helical surface, a hollow portion is formed between the vertical planes of the first contact surface and the second contact surface, and a fixing part is provided in the hollow portion.

[0005] In some embodiments, the nut fastening assembly includes a bolt, the bolt is threadedly connected to the first and second nuts, and the first nut is located between the head of the bolt and the second nut.

[0006] In some embodiments, a limiting portion is provided on the bottom surface of the head, and a plurality of limiting portions are arranged at intervals around the screw rod of the bolt.

[0007] In some embodiments, one end of the limiting portion is connected to the screw, and the other end extends outward from the screw and is connected to the end surface of the head, and the bottom of the limiting portion is a blade.

[0008] In some embodiments, a locking sleeve is provided inside the first nut and the second nut, and the locking sleeve is spirally wound to form a plurality of annular portions arranged up and down.

[0009] In some embodiments, at least some of the annular portions are spaced apart.

[0010] In some embodiments, the gold locking sleeve has a circular cross-section.

[0011] Technical effect of the utility model: A nut fastening assembly of the utility model can improve the locking stability of the nut and reduce the risk of loosening when subjected to vibration; in addition, its structure is relatively simple and easy to process and manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a nut fastening assembly according to an embodiment of the present utility model.

[0013] Figure 2 This is another schematic diagram of a nut fastening assembly according to an embodiment of the present invention.

[0014] Figure 3 Schematic diagram of the helicoidal surface of the embodiment of the present invention.

[0015] Figure 4 Schematic diagram of a bolt according to an embodiment of the present invention.

[0016] Figure 5 Schematic diagram of a locking sleeve according to an embodiment of the present invention.

[0017] Figure 6 It is a schematic diagram of the locking sleeve of the embodiment of the utility model when it is locked into the nut. DETAILED DESCRIPTION

[0018] The essential features and advantages of the present invention are further described below with reference to examples, but the present invention is not limited to the examples listed.

[0019] like Figures 1 to 6As shown, a nut fastening assembly of the present embodiment includes a first nut 1 and a second nut 2, the thread directions of the first and second nuts are the same, the first nut 1 is located above the second nut 2 and are coaxially arranged, the bottom surface of the first nut 1 is provided with a first contact surface 11, and the top surface of the second nut 2 is provided with a second contact surface 21 abutting against the first contact surface, the first contact surface 11 and the second contact surface 21 are both helical surfaces 30 and are arranged on the end faces of the two nuts, the rotation axis 10 of the helical surface is coaxial with the axis of the first and second nuts, the threads 20 of the first and second nuts extend to the inner side of the helical surface, and a vertical plane 303 is provided between the low position 301 and the high position 302 of the helical surface 30, and a hollow portion 3 is formed between the vertical planes of the first contact surface and the second contact surface, and a fixing member 4 is provided in the hollow portion 3 to enhance the connection stability. In the above technical solution, when the first and second nuts are tightened on the bolt 5, the first and second nuts are screwed so that the first nut 1 contacts the object 40, causing the first nut 1 to press against the object 40; then the second nut 2 is further screwed so that the second contact surface 21 of the second nut abuts against the first contact surface 11 of the first nut. Since the first and second contact surfaces are both helical surfaces, the two nuts are subjected to mutual pressure, enabling them to engage more firmly with the threads of the bolt 5; then, the fixing member 4 is inserted into the hollow portion so that the two nuts are not easily loosened when subjected to vibration. Through the above technical solution, the locking stability of the nuts can be improved and the risk of loosening when subjected to vibration can be reduced.

[0020] In this embodiment, the nut fastening assembly includes a bolt 5, which is threadedly connected to first and second nuts. The first nut 1 is located between the head 51 of the bolt 5 and the second nut 2, so that when in use, the second nut 2 abuts against the first nut 1 from below. The bottom surface of the head 51 is provided with a stopper 52. A plurality of stopper rings 52 are spaced around the bolt's screw 53. The stopper 52 allows the bolt to contact the object 40 through the stopper 52 after being tightened, thereby preventing slipping and enhancing the locking stability. One end of the stopper 52 is connected to the screw 53, and the other end extends outward from the screw 53 and connects to the end surface of the head 51. The bottom of the stopper 52 is a blade 521, which can be engaged with the object 40 to further prevent the bolt from loosening.

[0021] In this embodiment, a locking sleeve 6 is provided within the first and second nuts 1 and 2. This sleeve is used to repair or improve the nuts when they are damaged or dimensionalally misaligned. The sleeve 6 is spirally wound to form a plurality of annular portions 61 arranged vertically, giving the sleeve a spring-like shape. At least some of the annular portions 61 are spaced apart, allowing for a certain degree of axial elasticity. The annular portions 61 have a circular cross-section. The sleeve 6 is made of metal and retracts into the original threads of the nut, locking the bolt's threads to the inner threads of the sleeve.

[0022] A nut fastening assembly of this embodiment can improve the locking stability of the nut and reduce the risk of loosening when subjected to vibration; in addition, its structure is relatively simple and easy to process and manufacture.

[0023] It should be noted that the above preferred embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A nut fastening assembly, characterized in that: The present invention comprises a first nut and a second nut, wherein the thread direction of the first and second nuts is the same, the first nut is located above the second nut and is coaxially arranged, the bottom surface of the first nut is provided with a first contact surface, and the top surface of the second nut is provided with a second contact surface abutting against the first contact surface, the first contact surface and the second contact surface are both helical surfaces and are arranged on the end faces of the two nuts, the rotation axis of the helical surface is coaxial with the axis of the first and second nuts, the threads of the first and second nuts extend to the inner side of the helical surface, and a vertical plane is provided between the low position and the high position of the helical surface, a hollow portion is formed between the vertical planes of the first contact surface and the second contact surface, and a fixing part is provided in the hollow portion.

2. The nut fastening assembly according to claim 1, wherein: The nut fastening assembly includes a bolt, which is threadedly connected to a first nut and a second nut, and the first nut is located between the head of the bolt and the second nut.

3. The nut fastening assembly according to claim 2, characterized in that: The bottom surface of the head is provided with a limiting portion, and a plurality of limiting portions are arranged at intervals around the screw rod of the bolt.

4. The nut fastening assembly according to claim 3, wherein: One end of the limiting portion is connected to the screw rod, and the other end extends outward from the screw rod and is connected to the end surface of the head. The bottom of the limiting portion is a blade.

5. The nut fastening assembly according to claim 1, wherein: A locking sleeve is provided inside the first nut and the second nut, and the locking sleeve is spirally wound to form a plurality of annular portions arranged up and down.

6. The nut fastening assembly according to claim 5, characterized in that: At least some of the annular portions are spaced apart.

7. The nut fastening assembly according to claim 6, wherein: The cross section of the locking sleeve is circular.

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