A self-locking bolt and nut assembly

Abstract

The utility model relates to bolt nut technical field, concretely relates to a self -locking bolt nut assembly, include: bolt body and with its threaded connection nut body, the threaded end of bolt body is connected with polygonal column, the outer surface of polygonal column is equipped with the polygonal frame body that adapts to it, the outer surface of nut body is equipped with hexagonal frame body, still include two symmetrical arrangement's elastic stretch subassembly, one end of elastic stretch subassembly is connected with the outer surface of polygonal frame body, and the other end is connected with the end surface of hexagonal frame body, through above -mentioned mode, the self -locking bolt nut assembly of the utility model has solved the problem that the anti -loose effect is poor.

Description

Technical Field

[0001] This utility model relates to the field of bolt and nut technology, and in particular to a self-locking bolt and nut assembly. Background Technology

[0002] Bolts and nuts are used as matching fasteners. The nut, also known as a screw cap, is tightened onto the bolt or screw through thread to achieve a secure connection. This type of connection is called a bolted connection. Its significant characteristic is its detachability; simply unscrewing the nut from the bolt allows the two connected parts to be separated.

[0003] However, the inventors noticed a problem: when bolts are used in mechanical equipment, the threaded connection between ordinary bolts and nuts is prone to loosening due to continuous vibration caused by the equipment being in a vibrating environment for extended periods. This phenomenon directly weakens the reliability of the bolt-nut connection and seriously affects its performance. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a self-locking bolt and nut assembly, which solves the problem of poor anti-loosening effect.

[0005] To solve the above-mentioned technical problems, the present invention provides a self-locking bolt and nut assembly, comprising: a bolt body and a nut body threadedly connected thereto; a polygonal column is connected to the threaded end of the bolt body; a polygonal frame adapted to the outer surface of the polygonal column is fitted onto the outer surface of the polygonal column; a hexagonal frame is fitted onto the outer surface of the nut body; and two symmetrically arranged elastic tension components are also included, one end of which is connected to the outer surface of the polygonal frame, and the other end is connected to the end face of the hexagonal frame.

[0006] By adopting the above technical solution, in use, firstly, the bolt body is passed through the part to be fastened, and then the nut body is screwed into the threaded part of the bolt body. When the nut body presses against the fastener and forms a tight threaded engagement with the bolt body, initial tightening is achieved. Next, a hexagonal frame is placed over the outer surface of the nut body; after rotating the polygonal frame by a certain angle, it is then fitted onto the polygonal cylinder. At this time, the elastic tension component applies a circumferential tension to the hexagonal frame in the same direction as the bolt body's tightening. This force creates a preload between the nut body and the fastener in the same direction as the bolt body's tightening. This design effectively prevents the nut body from loosening due to vibration and other factors, significantly improving its anti-loosening effect.

[0007] In a preferred embodiment, the present invention can be further configured as follows: the elastic tensioning component includes a U-shaped rod and an elastic tensioning member, the end of the U-shaped rod is connected to the end face of the hexagonal frame, the elastic tensioning member includes an S-shaped spring steel flat strip, one end of the S-shaped spring steel flat strip is connected to a U-shaped plate, the other end is connected to a transition plate, the U-shaped plate is fitted onto the U-shaped rod, and the end of the transition plate away from the S-shaped spring steel flat strip is connected to the polygonal frame.

[0008] By adopting the above technical solution, after the handheld polygonal frame is rotated at a certain angle, the S-shaped spring steel flat strip is stretched and produces elastic deformation. At this time, the S-shaped spring steel flat strip has elastic tension, so that a preload force is formed between the nut body and the fastened fastener in the same direction as the bolt body, thereby achieving the purpose of preventing loosening.

[0009] In a preferred embodiment, the present invention can be further configured such that: the U-shaped plate is fitted onto the U-shaped rod and its position can be adjusted along the axial direction of the bolt body, and the distance that the U-shaped plate can be adjusted along the axial direction of the bolt body is greater than 8 threads of the bolt body.

[0010] By adopting the above technical solution, since the distance that the U-shaped plate can be adjusted along the axial direction of the bolt body is greater than 8 threads of the bolt body, it is convenient for the bolt and nut assembly to lock fasteners of different thicknesses.

[0011] In a preferred embodiment, the present invention can be further configured such that two U-shaped handles are symmetrically connected to the outer surface of the polygonal frame.

[0012] By adopting the above technical solution, two U-shaped handles are symmetrically connected to the outer surface of the polygonal frame, making it convenient for workers to hold and rotate the polygonal frame, thus improving the ease of operation.

[0013] In a preferred embodiment, the present invention can be further configured such that the distance by which the U-shaped plate is adjusted along the axial direction of the bolt body is less than the length of the polygonal column.

[0014] By adopting the above technical solution, since the distance that the U-shaped plate adjusts along the axial direction of the bolt body is less than the length of the polygonal column, the polygonal frame will not fall off the polygonal column during the movement of the U-shaped plate, thus enhancing the stability of the bolt and nut.

[0015] In a preferred embodiment, the present invention can be further configured such that the inner hole of the polygonal frame and the polygonal column are in a clearance fit.

[0016] By adopting the above technical solution, since the inner hole of the polygonal frame and the polygonal column are in a clearance fit, it is convenient for workers to fit the polygonal frame onto the polygonal column, thus improving the ease of operation.

[0017] In summary, this utility model has at least one of the following beneficial technical effects:

[0018] After rotating the polygonal frame by a certain angle, it is fitted onto the polygonal column. The elastic tension component applies a circumferential tension to the hexagonal frame in the same direction as the bolt body, which can effectively prevent the nut body from loosening due to vibration and other factors, and significantly improve its anti-loosening effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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, wherein:

[0020] Figure 1 This is a schematic diagram of a preferred embodiment of a self-locking bolt and nut assembly according to the present invention.

[0021] Figure 2 yes Figure 1 A schematic diagram of the structure of a medium-elastic tension component.

[0022] In the diagram: 1. Bolt body; 2. Nut body; 3. Polygonal column; 4. Polygonal frame; 5. Hexagonal frame; 60. Elastic tension component; 7. U-shaped handle;

[0023] 61. U-shaped bar; 62. Elastic tension member; 621. S-shaped spring steel flat bar; 622. U-shaped plate; 623. Transition plate. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0026] Reference Figures 1-2 This utility model discloses a self-locking bolt and nut assembly, comprising: a bolt body 1 and a nut body 2 threadedly connected thereto. The threaded end of the bolt body 1 is connected to a polygonal column 3. A polygonal frame 4 adapted to the outer surface of the polygonal column 3 is fitted thereto. A hexagonal frame 5 is fitted and connected to the outer surface of the nut body 2. It also includes two symmetrically arranged elastic tension components 60. One end of the elastic tension component 60 is connected to the outer surface of the polygonal frame 4, and the other end is connected to the end face of the hexagonal frame 5.

[0027] The elastic tension assembly 60 includes a U-shaped rod 61 and an elastic tension member 62. The end of the U-shaped rod 61 is connected to the end face of the hexagonal frame 5. The elastic tension member 62 includes an S-shaped spring steel flat strip 621. One end of the S-shaped spring steel flat strip 621 is connected to a U-shaped plate 622, and the other end is connected to a transition plate 623. The S-shaped spring steel flat strip 621, the U-shaped plate 622, and the transition plate 623 are designed as an integrated structure. The U-shaped plate 622 is fitted onto the U-shaped rod 61. The end of the transition plate 623 away from the S-shaped spring steel flat strip 621 is connected to the polygonal frame 4. After the polygonal frame 4 is rotated by hand at a certain angle, the S-shaped spring steel flat strip 621 is stretched and undergoes elastic deformation. At this time, the S-shaped spring steel flat strip 621 has elastic tension, which makes a preload force between the nut body 2 and the fastened fastener consistent with the tightening direction of the bolt body 1, thereby achieving the purpose of preventing loosening.

[0028] The U-shaped plate 622 is fitted onto the U-shaped rod 61 and its position can be adjusted along the axial direction of the bolt body 1. The distance that the U-shaped plate 622 can be adjusted along the axial direction of the bolt body 1 is greater than 8 threads of the bolt body 1. Since the distance that the U-shaped plate 622 can be adjusted along the axial direction of the bolt body 1 is greater than 8 threads of the bolt body 1, it is convenient for the bolt and nut assembly to lock fasteners of different thicknesses.

[0029] Two U-shaped handles 7 are symmetrically connected to the outer surface of the polygonal frame 4. The two U-shaped handles 7 are symmetrically connected to the outer surface of the polygonal frame 4, which makes it convenient for workers to hold the polygonal frame 4 and rotate it, thus improving the ease of operation.

[0030] The distance that the U-shaped plate 622 can be adjusted along the axial direction of the bolt body 1 is less than the length of the polygonal column 3. Because the distance that the U-shaped plate 622 can be adjusted along the axial direction of the bolt body 1 is less than the length of the polygonal column 3, the polygonal frame 4 will not fall off the polygonal column 3 during the movement of the U-shaped plate 622, thus enhancing the stability of the bolt and nut.

[0031] The inner hole of the polygonal frame 4 and the polygonal column 3 are in clearance fit; because the inner hole of the polygonal frame 4 and the polygonal column 3 are in clearance fit, it is convenient for workers to fit the polygonal frame 4 onto the polygonal column 3, which improves the convenience of operation.

[0032] The implementation principle of this embodiment is as follows: First, the bolt body 1 is passed through the part to be fastened, and then the nut body 2 is screwed into the threaded portion of the bolt body 1. When the nut body 2 presses against the fastened part and forms a tight threaded engagement with the bolt body 1, initial tightening is achieved. Next, the hexagonal frame 5 is placed on the outer surface of the nut body 2; after rotating the polygonal frame 4 by a certain angle, it is placed on the polygonal cylinder 3. At this time, the elastic tension component 60 applies a circumferential tension force to the hexagonal frame 5 in the same direction as the bolt body 1's tightening. This force creates a preload force between the nut body 2 and the fastened part, consistent with the tightening direction of the bolt body 1. This design effectively prevents the nut body 2 from loosening due to vibration and other factors, significantly improving its anti-loosening effect.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A self-locking bolt and nut assembly, characterized in that, include: The bolt body (1) and the nut body (2) connected to it by threads, the threaded end of the bolt body (1) is connected to a polygonal column (3), the outer surface of the polygonal column (3) is fitted with a polygonal frame (4) that is adapted to it, the outer surface of the nut body (2) is fitted with a hexagonal frame (5), and also includes two symmetrically arranged elastic tension components (60), one end of the elastic tension component (60) is connected to the outer surface of the polygonal frame (4), and the other end is connected to the end face of the hexagonal frame (5).

2. The self-locking bolt and nut assembly according to claim 1, characterized in that, The elastic tension component (60) includes a U-shaped rod (61) and an elastic tension member (62). The end of the U-shaped rod (61) is connected to the end face of the hexagonal frame (5). The elastic tension member (62) includes an S-shaped spring steel flat strip (621). One end of the S-shaped spring steel flat strip (621) is connected to a U-shaped plate (622), and the other end is connected to a transition plate (623). The U-shaped plate (622) is fitted onto the U-shaped rod (61). The end of the transition plate (623) away from the S-shaped spring steel flat strip (621) is connected to the polygonal frame (4).

3. The self-locking bolt and nut assembly according to claim 2, characterized in that, The U-shaped plate (622) is fitted onto the U-shaped rod (61) and its position can be adjusted along the axial direction of the bolt body (1). The distance that the U-shaped plate (622) can be adjusted along the axial direction of the bolt body (1) is greater than 8 threads of the bolt body (1).

4. The self-locking bolt and nut assembly according to claim 1, characterized in that, The outer surface of the polygonal frame (4) is symmetrically connected to two U-shaped handles (7).

5. The self-locking bolt and nut assembly according to claim 2, characterized in that, The distance that the U-shaped plate (622) is adjusted along the axial direction of the bolt body (1) is less than the length of the polygonal column (3).

6. The self-locking bolt and nut assembly according to claim 1, characterized in that, The inner hole of the polygonal frame (4) and the polygonal column (3) are fitted with a clearance.

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