Fastening bolt with self-locking structure

Abstract

The utility model relates to the technical field of mechanical fasteners, and discloses a fastening bolt with a self-locking structure, which comprises a bolt body, the thread part of the bolt body is in threaded connection with a nut, the surface of the nut is sleeved with a hexagonal sleeve, the surface of the hexagonal sleeve is fixedly provided with two frames, and the two frames are fixedly connected with the bolt body. A hexagonal sleeve is arranged in the middle of the bolt body, a limiting assembly for limiting the hexagonal sleeve is arranged in the middle of the frame, a support is fixedly arranged at the bottom end of the hexagonal sleeve, two positioning grooves are formed in the bottom end of the bolt body, and the positioning grooves are connected with positioning rods in a clamped mode. The hexagonal sleeve can be fixed to the nut through the limiting assembly and can be prevented from loosening and falling off, the positioning groove is formed in the bottom end of the bolt body, the positioning rod is clamped in the positioning groove, the support can be limited, the support can limit the hexagonal sleeve, the hexagonal sleeve can prevent the nut from loosening and falling off, and self-locking of the nut can be achieved; and the reliability requirement in a long-term vibration environment can be met.

Description

Technical Field

[0001] This utility model relates to the field of mechanical fastener technology, specifically a fastening bolt with a self-locking structure. Background Technology

[0002] A fastening bolt is a mechanical fastener that uses threaded joints to generate axial clamping force. Its core function is to clamp and fix two or more components into one unit by tightening the bolt head and nut together. A typical structure includes: a threaded rod, a bolt head for applying force (such as a hexagonal head / internal hexagonal head), and a matching nut. During operation, the preload is maintained by the self-locking principle of the inclined plane of the thread. It is widely used in equipment assembly, building structures, vehicle manufacturing and other scenarios that require detachable rigid connections.

[0003] Existing fastening bolts are usually fastened with nuts and flat washers or spring washers. However, under high-frequency vibration conditions, nuts are prone to slight rotation due to vibration, which can lead to a decrease in preload or even stripping failure. Traditional anti-loosening measures (such as double nuts, thread sealant, etc.) have problems such as complex assembly, difficult maintenance, or poor environmental adaptability. Ordinary self-locking nuts have limited anti-loosening performance and cannot meet the reliability requirements under long-term vibration environments.

[0004] Therefore, there is an urgent need for a new type of fastening structure that can fundamentally suppress the rotation and stripping of the nut in order to improve the safety and durability of bolted connections. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a fastening bolt with a self-locking structure, which has the advantages of good self-locking and is not easy to loosen, thus solving the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a fastening bolt with a self-locking structure, including a bolt body, a nut connected to the threaded portion of the bolt body, a hexagonal sleeve fitted on the surface of the nut, two frame edges fixedly provided on the surface of the hexagonal sleeve, a limiting component for limiting the hexagonal sleeve in the middle of the frame edges, a bracket fixedly provided at the bottom end of the hexagonal sleeve, two positioning grooves opened at the bottom end of the bolt body, positioning rods engaged with the positioning grooves, and an angle fine-tuning component for adjusting the positioning rods in the middle of the bottom end of the bracket.

[0007] As a preferred technical solution of this utility model, the limiting component includes a limiting rod, a sliding groove is provided in the middle of the frame to slide and connect with the limiting rod, a spring is sleeved on the surface of the limiting rod, an end is fixedly provided at one end of the limiting rod, and a rod groove is provided on the surface of the nut to engage with the limiting rod.

[0008] As a preferred technical solution of this utility model, the top of the frame is provided with a contraction opening communicating with the slide groove, and the surface of the limiting rod is fixedly provided with a protrusion corresponding to the contraction opening.

[0009] As a preferred technical solution of this utility model, the surface of the hexagonal sleeve is provided with a slide rail that is slidably connected to the limiting rod, and a damping rubber sleeve is engaged inside the slide rail.

[0010] As a preferred embodiment of this utility model, a baffle is fixedly provided on one side of the limiting rod, the spring is located between the baffle and the frame, and a rubber sheet is adhered to one side of the baffle.

[0011] As a preferred embodiment of this utility model, the angle fine-tuning component includes a round rod, a through hole is provided in the middle of the bottom end of the bracket for inserting and connecting with the round rod, a pad is fixedly provided at the top end of the round rod, the bottom end of the positioning rod is fixedly connected to the top end of the pad, and a stop plate is fixedly provided at the bottom end of the round rod.

[0012] As a preferred embodiment of this utility model, the surface of the baffle is provided with an angle limiting groove, and one side of the bottom end of the bracket is fixed with an angle limiting block corresponding to the angle limiting groove.

[0013] As a preferred embodiment of this utility model, a gasket is fitted onto the surface of the bolt body, and the gasket is located between the bolt head and the nut.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The hexagonal sleeve can be fixed to the nut by the limiting component, which can prevent the hexagonal sleeve from loosening and falling off. By opening a positioning groove at the bottom of the bolt body and engaging the positioning rod inside it, the bracket can be limited. The bracket can limit the hexagonal sleeve, and the hexagonal sleeve can prevent the nut from loosening and falling off, which can realize the self-locking of the nut and meet the reliability requirements under long-term vibration environment.

[0016] 2. The angle fine-tuning component avoids the rigid connection between the positioning rod and the bracket. After the nut is tightened, the horizontal angle of the positioning rod can be finely adjusted, allowing it to be inserted into the positioning groove. It can also limit the rotation angle of the hexagonal sleeve, preventing the nut preload from decreasing. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0018] Figure 2 This is the second structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the angle fine-tuning component of this utility model;

[0021] Figure 5 This is a schematic diagram of the limiting component of this utility model.

[0022] In the diagram: 1. Bolt body; 2. Nut; 3. Hexagonal sleeve; 4. Frame; 5. Limiting assembly; 501. Limiting rod; 502. Spring; 503. End; 504. Baffle; 505. Rubber sheet; 506. Protrusion; 6. Slide rail; 7. Damping sleeve; 8. Slide groove; 9. Shrinkage opening; 10. Bolt head; 11. Washer; 12. Rod groove; 13. Bracket; 14. Angle fine-tuning assembly; 1401. Round rod; 1402. Washer plate; 1403. Baffle plate; 1404. Angle limiting groove; 15. Through hole; 16. Angle limiting block; 17. Positioning rod; 18. Positioning groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 The fastening bolt with a self-locking structure includes a bolt body 1, a nut 2 threadedly connected to the bolt body 1, a hexagonal sleeve 3 fitted on the surface of the nut 2, two frame edges 4 fixedly provided on the surface of the hexagonal sleeve 3, a limiting component 5 for limiting the hexagonal sleeve 3 in the middle of the frame edges 4, a bracket 13 fixedly provided at the bottom end of the hexagonal sleeve 3, two positioning grooves 18 opened at the bottom end of the bolt body 1, a positioning rod 17 engaged in the positioning grooves 18, an angle fine-tuning component 14 for adjusting the positioning rod 17 in the middle of the bottom end of the bracket 13, the hexagonal sleeve 3 can be fixed on the nut 2 by the limiting component 5, which can prevent the hexagonal sleeve 3 from loosening and falling off, the positioning grooves 18 opened at the bottom end of the bolt body 1 and the positioning rod 17 engaged in the grooves 18, can limit the bracket 13, the bracket 13 can limit the hexagonal sleeve 3, the hexagonal sleeve 3 can prevent the nut 2 from loosening and falling off, and the self-locking of the nut 2 can be achieved, which can meet the reliability requirements under long-term vibration environment;

[0025] In this embodiment, preferably, the limiting component 5 includes a limiting rod 501, a groove 8 slidably connected to the limiting rod 501 is provided in the middle of the frame 4, a spring 502 is sleeved on the surface of the limiting rod 501, an end 503 is fixedly provided at one end of the limiting rod 501, a rod groove 12 engaging with the limiting rod 501 is provided on the surface of the nut 2, a contraction opening 9 communicating with the groove 8 is provided at the top of the frame 4, a protrusion 506 corresponding to the contraction opening 9 is fixedly provided on the surface of the limiting rod 501, a slide 6 slidably connected to the limiting rod 501 is provided on the surface of the hexagonal sleeve 3, a damping rubber sleeve 7 is engaged inside the slide 6, a baffle 504 is fixedly provided on one side of the limiting rod 501, the spring 502 is located between the baffle 504 and the frame 4, and the baffle 504... A rubber sheet 505 is bonded to one side. By pulling the limiting rod 501 through the end 503, the protrusion 506 passes through the slide 6. The limiting rod 501 can retract and compress the spring 502. By misaligning the protrusion 506 with the slide 6, the retracted state of the limiting rod 501 can be maintained, making it easy to put the hexagonal sleeve 3 on the nut 2. By aligning the protrusion 506 with the slide 6 in a straight line, the spring 502 can push the limiting rod 501 to reset, allowing it to be inserted into the rod groove 12, thereby locking the nut 2 and preventing it from loosening. The rubber sheet 505 can increase the fit and stability between the baffle 504 and the hexagonal sleeve 3. The damping rubber sleeve 7 can provide sliding damping for the limiting rod 501, so that the limiting rod 501 is not easy to shake when the bolt body 1 is vibrated.

[0026] In this embodiment, preferably, the angle fine-tuning component 14 includes a round rod 1401. A through hole 15 is provided in the middle of the bottom end of the bracket 13, which is inserted and connected to the round rod 1401. A pad 1402 is fixedly provided at the top end of the round rod 1401. The bottom end of the positioning rod 17 is fixedly connected to the top end of the pad 1402. A baffle 1403 is fixedly provided at the bottom end of the round rod 1401. An angle limiting groove 1404 is provided on the surface of the baffle 1403. An angle limiting block 16 corresponding to the angle limiting groove 1404 is fixedly provided on one side of the bottom end of the bracket 13. The pad 1402 can be rotated through the round rod 1401, which can adjust the horizontal angle of the positioning rod 17 and insert it into the positioning groove 18. The rotation angle of the round rod 1401 can be limited through the angle limiting groove 1404 and the angle limiting block 16, thereby limiting the rotation angle of the hexagonal sleeve 3 and avoiding the phenomenon of the preload of the nut 2 decreasing.

[0027] In this embodiment, preferably, a gasket 11 is provided on the surface of the bolt body 1. The gasket 11 is located between the bolt head 10 and the nut 2. The provision of the gasket 11 can increase the contact area.

[0028] In use, first pass the bolt body 1 through the bolt hole and place the washer 11, then tighten the nut 2. Then, pull the limiting rod 501 through the end 503 of the limiting component 5 so that the protrusion 506 passes through the slide 6. The limiting rod 501 can retract and compress the spring 502. Then, make the protrusion 506 and the slide 6 misaligned to keep the limiting rod 501 in the retracted state. Finally, put the hexagonal sleeve 3 on the nut 2. After the hexagonal sleeve 3 is installed, make the protrusion 506 and the slide 6 in the same straight line. The spring 502 can push the limiting rod 501 to reset and can be inserted into the rod groove 12 to lock the nut 2.

[0029] During the installation of the hexagonal sleeve 3, the horizontal angle of the positioning rod 17 is adjusted by rotating the pad 1402 through the round rod 1401 of the angle fine-tuning component 14, so that it can be inserted into the positioning groove 18. After the hexagonal sleeve 3 is installed, the angle limiting groove 1404 and the angle limiting block 16 can limit the rotation angle of the round rod 1401, thereby limiting the rotation angle of the hexagonal sleeve 3, avoiding the phenomenon of the preload of the nut 2 decreasing, preventing the nut 2 from loosening, and ensuring its self-locking ability while facilitating installation.

[0030] After the nut 2 is locked, when the bolt body 1 is vibrated, the rubber sheet 505 can increase the fit and stability between the baffle 504 and the hexagonal sleeve 3, and the damping rubber sleeve 7 can provide sliding damping for the limit rod 501. When the bolt body 1 is vibrated, the limit rod 501 is not easy to shake.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fastening bolt with a self-locking structure, comprising a bolt body (1), characterized in that: The bolt body (1) is threaded with a nut (2). A hexagonal sleeve (3) is fitted on the surface of the nut (2). Two side frames (4) are fixed on the surface of the hexagonal sleeve (3). A limiting component (5) for limiting the hexagonal sleeve (3) is provided in the middle of the side frames (4). A bracket (13) is fixed at the bottom of the hexagonal sleeve (3). Two positioning grooves (18) are opened at the bottom of the bolt body (1). A positioning rod (17) is engaged with the positioning grooves (18). An angle fine-tuning component (14) for adjusting the positioning rod (17) is provided in the middle of the bottom of the bracket (13).

2. The fastening bolt with a self-locking structure according to claim 1, characterized in that: The limiting component (5) includes a limiting rod (501), and a sliding groove (8) is provided in the middle of the frame (4) to slide and connect with the limiting rod (501). A spring (502) is sleeved on the surface of the limiting rod (501), and an end head (503) is fixedly provided at one end of the limiting rod (501). A rod groove (12) is provided on the surface of the nut (2) to engage with the limiting rod (501).

3. The fastening bolt with a self-locking structure according to claim 2, characterized in that: The top of the frame (4) is provided with a contraction opening (9) that communicates with the slide groove (8), and the surface of the limiting rod (501) is fixedly provided with a protrusion (506) corresponding to the contraction opening (9).

4. The fastening bolt with self-locking structure according to claim 2, characterized in that: The surface of the hexagonal sleeve (3) is provided with a slide rail (6) that is slidably connected to the limiting rod (501), and a damping rubber sleeve (7) is engaged inside the slide rail (6).

5. The fastening bolt with a self-locking structure according to claim 2, characterized in that: A baffle (504) is fixedly provided on one side of the limiting rod (501), and the spring (502) is located between the baffle (504) and the frame (4). A rubber sheet (505) is glued to one side of the baffle (504).

6. The fastening bolt with a self-locking structure according to claim 1, characterized in that: The angle fine-tuning component (14) includes a round rod (1401), and a through hole (15) is provided in the middle of the bottom end of the bracket (13) for inserting and connecting with the round rod (1401). A pad (1402) is fixedly provided at the top end of the round rod (1401), and the bottom end of the positioning rod (17) is fixedly connected to the top end of the pad (1402). A baffle (1403) is fixedly provided at the bottom end of the round rod (1401).

7. The fastening bolt with a self-locking structure according to claim 6, characterized in that: An angle limiting groove (1404) is provided on the surface of the baffle (1403), and an angle limiting block (16) corresponding to the angle limiting groove (1404) is fixed on one side of the bottom end of the bracket (13).

8. The fastening bolt with self-locking structure according to claim 1, characterized in that: A gasket (11) is fitted on the surface of the bolt body (1), and the gasket (11) is located between the bolt head (10) and the nut (2).

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