High-strength locking nut

Abstract

The utility model discloses a high strength locknut, including main nut, plastic nut and backing plate, the bottom of main nut is provided with one mounting groove, the top wall of mounting groove is provided with one first threaded hole, the plastic nut is embedded in the mounting groove, the plastic nut is composed of main part and conical part, the main part is matched with the mounting groove, the conical part is matched with the first threaded hole, and the second threaded hole is matched with the first threaded hole. The main body part is embedded in the mounting groove, the conical part is fixed to the bottom end of the main body part, the outer portion of the conical part is in a big-end-up cone frustum shape, the lower end of the conical part is located below the main nut, a second threaded hole is formed in the plastic nut and penetrates through the upper end and the lower end of the plastic nut, and the inner diameter of the first threaded hole is the same as that of the second threaded hole. The first threaded hole and the second threaded hole are provided with the same internal threads. According to the utility model, the plastic nut is embedded at the bottom of the main nut, and the plastic nut is pressed by the base plate to deform, so that the screw rod is engaged and locked by the plastic nut, and the whole nut is not easy to loosen.

Description

[Technical field]

[0001] The utility model relates to the technical field of fasteners, in particular to the technical field of locking nuts. [Background technology]

[0002] Locking nuts are used to connect two or more objects that need to be connected together, and the objects are firmly fixed and will not loosen. However, in some cases, locking nuts may loosen due to vibration and other reasons. Once loosened, the connection reliability between the connected objects will deteriorate, and even the connected objects may loosen, which will bring safety hazards. [Contents of the utility model]

[0003] The utility model aims to solve the problems in the prior art and provides a high-strength locking nut, which can prevent the locking nut from loosening after installation.

[0004] To achieve the above-mentioned purpose, the utility model proposes a high-strength locking nut, including a main nut, a plastic nut, and a gasket. The bottom of the main nut is provided with a mounting groove, and the top wall of the mounting groove is provided with a first threaded hole. The plastic nut is embedded in the mounting groove. The plastic nut is composed of a main body and a tapered part. The main body is adapted to the mounting groove, and the main body is embedded in the mounting groove. The tapered part is fixed to the bottom end of the main body. The outside of the tapered part is a truncated cone with a larger top and a smaller bottom. The lower end of the tapered part is located below the main nut. A second threaded hole is provided inside the plastic nut. The second threaded hole runs through the upper and lower ends of the plastic nut. The first threaded hole and the second threaded hole have the same inner diameter. The first threaded hole and the second threaded hole are provided with the same internal thread. The grooved holes and the tapered portion are located on the same vertical central axis; a plurality of vertically arranged dividing grooves are arranged on the side wall of the tapered portion, the dividing grooves penetrate the side wall of the tapered portion, the dividing grooves open at the bottom end of the tapered portion, and the dividing grooves evenly divide the tapered portion into a plurality of arc-shaped petals; a pad is arranged under the main nut, a tapered hole which is larger at the top and smaller at the bottom is arranged on the top of the pad, a vertically arranged through hole is arranged at the bottom end of the tapered hole, the through hole penetrates to the lower end face of the pad, the inner diameter of the through hole is equal to the inner diameter of the bottom of the tapered hole, the inner diameter of the through hole is larger than the inner diameter of the first threaded hole, the top of the pad is close to the bottom end of the main nut and the first threaded hole and the through hole are located on the same vertical axis, the inner wall of the tapered hole is close to the outer wall of the tapered portion and at this time the inner diameter of the tapered portion is smaller than the initial inner diameter of the tapered portion.

[0005] Preferably, the cross-section of the mounting groove is triangular, quadrilateral or hexagonal.

[0006] Preferably, the top end of the main body is in close contact with the top wall of the mounting groove.

[0007] Preferably, a portion of the tapered portion is located inside the mounting groove.

[0008] The beneficial effects of the utility model are as follows: the utility model embeds the plastic nut at the bottom of the main nut and compresses the plastic nut to deform through the pad, so that the plastic nut bites and locks the screw rod, making the entire nut not easy to loosen; a part of the tapered portion is located inside the installation groove so that the tapered portion will not be stuck between the lower end face of the main nut and the upper end face of the pad, and the locking nut is not easy to get stuck during installation.

[0009] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0010] Figure 1 This is the front view of the high-strength locking nut of the utility model;

[0011] Figure 2 This is a bottom view of the main nut of the high-strength locking nut of the utility model;

[0012] In the figure: 1-main nut, 2-plastic nut, 3-shim, 10-mounting groove, 15-first threaded hole, 21-main body, 22-conical part, 23-separation groove, 24-arc-shaped petal, 25-second threaded hole, 30-conical hole, 35-through hole. [Specific implementation method]

[0013] See also Figure 1 , Figure 2The utility model high-strength locking nut comprises a main nut 1, a plastic nut 2, and a gasket 3. A mounting groove 10 is provided at the bottom of the main nut 1, and a first threaded hole 15 is provided on the top wall of the mounting groove 10. The plastic nut 2 is embedded in the mounting groove 10. The plastic nut 2 is composed of a main body 21 and a tapered portion 22. The main body 21 is adapted to the mounting groove 10, and the main body 21 is embedded in the mounting groove 10. The tapered portion 22 is fixed to the bottom end of the main body 21. The outer surface of the tapered portion 22 is a truncated cone with a larger upper portion and a smaller lower portion. The lower end of the tapered portion 22 is located below the main nut 1. A second threaded hole 25 is provided inside the plastic nut 2. The second threaded hole 25 passes through the upper and lower ends of the plastic nut 2. The first threaded hole 15 and the second threaded hole 25 have the same inner diameter. The first threaded hole 15 and the second threaded hole 25 are provided with the same internal thread. The first threaded hole 15, the second threaded hole 25, and the tapered portion 22 are provided with the same internal thread. The conical portion 22 is located on the same vertical central axis, and a plurality of vertically arranged dividing grooves 23 are provided on the side wall of the conical portion 22, and the dividing grooves 23 penetrate the side wall of the conical portion 22, and the dividing grooves 23 are open at the bottom end of the conical portion 22, and the dividing grooves 23 evenly divide the conical portion 22 into a plurality of arc-shaped petals 24, and a pad 3 is provided under the main nut 1, and a conical hole 30 which is larger at the top and smaller at the bottom is provided on the top of the pad 3, and a vertically arranged through hole 35 is provided at the bottom end of the conical hole 30, and the through hole 35 penetrates to the lower end surface of the pad 3, and the inner diameter of the through hole 35 is equal to the inner diameter of the bottom of the conical hole 30, and the inner diameter of the through hole 35 is larger than the inner diameter of the first threaded hole 15, and when the top end of the pad 3 is close to the bottom end of the main nut 1 and the first threaded hole 15 and the through hole 35 are located on the same vertical axis, the inner wall of the conical hole 30 is close to the outer wall of the conical portion 22, and at this time, the inner diameter of the conical portion 22 is smaller than the initial inner diameter of the conical portion 22.

[0014] In order to avoid relative rotation between the main nut 1 and the plastic nut 2, the cross section of the mounting groove 10 is not circular, and the cross section of the mounting groove 10 can be triangular, quadrilateral or hexagonal.

[0015] In order to ensure that the plastic nut 2 does not move upward when the tapered portion 22 is pressed by the tapered hole 30 , the top end of the main body 21 is in close contact with the top wall of the mounting groove 10 .

[0016] In order to prevent the conical portion 22 from being stuck between the lower end surface of the main nut 1 and the upper end surface of the backing plate 3 , a portion of the conical portion 22 is located inside the mounting groove 10 .

[0017] Working process of this utility model:

[0018] During the working process of the high-strength locking nut of the utility model, taking the installation of the nut on the screw as an example, the backing plate 3 is firstly put on the screw, and then the combination of the main nut 1 and the plastic nut 2 is screwed on the screw until the main nut 1 is tightly pressed against the backing plate 3. As the combination of the main nut 1 and the plastic nut 2 is screwed, the tapered portion 22 on the plastic nut 2 will gradually penetrate into the tapered hole 30 of the backing plate 3. As the tapered hole 30 is in continuous contact with the tapered portion 22, the tapered hole 30 will apply an inward compressive force to the arcuate petals 24 constituting the tapered portion 22, so that the arcuate petals 2 are tilted inwardly. Once the arcuate petals are tilted inwardly, they will bite the screw, and the friction between the plastic nut 2 and the screw will increase sharply, so that the locking nut is not easy to loosen.

[0019] It is particularly important to point out that when disassembly is required, use a wrench or other tool to twist the main nut 1 in the direction of loosening it to disassemble the combination of the main nut 1 and the plastic nut 2. During the disassembly process, the internal thread inside the plastic nut 2 will be damaged, and the plastic nut 2 needs to be replaced if it is to be reinstalled.

[0020] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. High-strength locking nut, characterized by: The invention comprises a main nut (1), a plastic nut (2), and a gasket (3); a mounting groove (10) is provided at the bottom of the main nut (1); a first threaded hole (15) is provided on the top wall of the mounting groove (10); the plastic nut (2) is embedded in the mounting groove (10); the plastic nut (2) is composed of a main body (21) and a tapered part (22); the main body (21) is adapted to the mounting groove (10); the main body (21) is embedded in the mounting groove (10); the tapered part (22) is fixed to the main body (21) The bottom of the conical portion (22) is in the shape of a truncated cone with a larger top and a smaller bottom. The lower end of the conical portion (22) is located below the main nut (1). A second threaded hole (25) is provided inside the plastic nut (2). The second threaded hole (25) passes through the upper and lower ends of the plastic nut (2). The first threaded hole (15) and the second threaded hole (25) have the same inner diameter. The first threaded hole (15) and the second threaded hole (25) are provided with the same internal thread. The first threaded hole (15), the second threaded hole (25), and the conical portion (22) are located On the same vertical central axis, a plurality of vertically arranged dividing grooves (23) are arranged on the side wall of the conical portion (22), the dividing grooves (23) penetrate the side wall of the conical portion (22), the dividing grooves (23) are open at the bottom end of the conical portion (22), and the dividing grooves (23) evenly divide the conical portion (22) into a plurality of arc-shaped petals (24), a pad (3) is arranged below the main nut (1), a conical hole (30) with a larger upper portion and a smaller lower portion is arranged on the top of the pad (3), and a vertically arranged conical hole (30) is arranged at the bottom end of the conical hole (30) A through hole (35) is provided, the through hole (35) penetrates to the lower end surface of the backing plate (3), the inner diameter of the through hole (35) is equal to the inner diameter of the bottom of the tapered hole (30), the inner diameter of the through hole (35) is larger than the inner diameter of the first threaded hole (15), the top end of the backing plate (3) is tightly against the bottom end of the main nut (1) and the first threaded hole (15) and the through hole (35) are located on the same vertical axis, the inner wall of the tapered hole (30) is tightly against the outer wall of the tapered portion (22) and at this time the inner diameter of the tapered portion (22) is smaller than the initial inner diameter of the tapered portion (22).

2. The high-strength locking nut according to claim 1, characterized in that: The cross section of the installation groove (10) is triangular, quadrilateral or hexagonal.

3. The high-strength locking nut according to claim 1, characterized in that: The top end of the main body (21) is in close contact with the top wall of the mounting groove (10).

4. The high-strength locking nut according to claim 1, characterized in that: A portion of the tapered portion (22) is located inside the mounting groove (10).

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