High-strength check bolt

Abstract

The utility model discloses a high-strength check bolt, which belongs to the technical field of bolts and comprises a main screw, the lower surface of the main screw is in threaded connection with a limiting component, the outer surface of the main screw is in threaded connection with a fastening nut, two sides of the outer surface of the fastening nut are fixedly connected with extension plates, and the lower surface of each extension plate is provided with a circular groove. A connecting assembly is inserted into the circular groove; the limiting assembly comprises an auxiliary screw, and the outer surface of the auxiliary screw is in threaded connection with the lower surface of the main screw. By means of the limiting assembly and the connecting assembly, the connecting plate and the extending plate can be connected through the threaded rod, due to the fact that the thread parameters of the main screw and the auxiliary screw are different, the auxiliary screw and the fastening nut are matched with each other after being tightened and generate the clamping stagnation effect, and therefore the main screw and the fastening nut are effectively prevented from automatically rotating in the continuous vibration process; and therefore, the overall stability of connection is improved, the anti-loosening performance is enhanced, and the safety and reliability of the connection part under the complex working condition are further guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt technical field, specifically a high strength lock bolt. BACKGROUND

[0002] Lock bolt is a kind of fastener with special design or locking device, aims at preventing loosening or falling off in the environment of vibration, pressure and temperature change, in the field of petrochemical industry, due to the equipment is often under high temperature, high pressure and frequent vibration working conditions, ordinary bolt is prone to loosening, can cause leakage, equipment failure even safety accident, therefore, using lock bolt can ensure the stability and reliability of connection, prevent the security risks caused by loosening, effectively guarantee production safety and the normal operation of equipment.

[0003] However, in practical application, locking bolt still has certain failure risk under continuous vibration or dynamic load environment, although locking nut and other anti-loosening measures are used, nut can still be slightly rotated due to vibration impact, leading to the gradual decrease of pre-tightening force, and further affecting the stability and reliability of connection.

[0004] Therefore, the utility model provides a high strength lock bolt to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model provides a high strength lock bolt, aims at solving the problem in the background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: a high strength lock bolt, including main screw rod, the lower surface of main screw rod is connected with limiting component in screw thread, the outer surface of main screw rod is connected with fastening nut in screw thread, both sides of fastening nut outer surface are fixedly connected with extension plate, the lower surface of extension plate is equipped with circular groove, connecting component is inserted in the inside of circular groove;

[0007] Limiting component includes vice screw rod, the outer surface of vice screw rod is connected to the lower surface of main screw rod in screw thread, the bottom of vice screw rod is fixedly connected with vice nut, both sides of vice nut outer surface are fixedly connected with connecting plate.

[0008] As a preferred technical scheme of the application, the connecting component includes threaded rod, the top of threaded rod is inserted in the inside of circular groove, the upper portion of threaded rod outer surface is fixedly connected with limiting plate, the lower portion of threaded rod outer surface is connected with limiting nut in screw thread.

[0009] As a preferred technical scheme of the application, one side of connecting plate is equipped with recess, and the recess is matched with threaded rod.

[0010] As a preferred technical scheme of the present application, the top end of the main screw rod is fixedly connected with a main screw cap, and the lower surface of the main screw cap is fixedly connected with a fastening assembly.

[0011] As a preferred technical scheme of the present application, the fastening assembly comprises a fastening spring, the top end of the fastening spring is fixedly connected to the lower surface of the main screw cap, the bottom end of the fastening spring is fixedly connected with a mounting sheet, and the lower surface of the mounting sheet is fixedly connected with a shock pad.

[0012] As a preferred technical scheme of the present application, a through groove is formed in the middle of the upper surface of the mounting sheet and the shock pad, and the through groove is slidably connected to the upper part of the outer surface of the main screw rod.

[0013] By means of the limiting assembly and the connecting assembly, the connecting plate and the extension plate are connected through the threaded rod, the fastening nut and the secondary screw cap are matched with each other and produce the jamming effect after being tightened due to the different thread parameters of the main screw rod and the secondary screw rod, so that the main screw rod and the fastening nut are effectively prevented from rotating by themselves in the continuous vibration, the overall stability of the connection is improved, the anti-loosening performance is enhanced, and the safety and reliability of the connection part under complex working conditions are further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of a high-strength anti-loosening bolt.

[0015] Figure 2 It is a structural schematic view of a connecting plate in a high-strength anti-loosening bolt.

[0016] Figure 3 It is a structural schematic view of a threaded rod in a high-strength anti-loosening bolt.

[0017] Figure 4 It is a structural schematic view of a main screw cap in a high-strength anti-loosening bolt.

[0018] In the drawings:

[0019] 1, main screw rod; 2, fastening nut; 3, extension plate; 4, secondary screw rod; 5, secondary screw cap; 6, connecting plate; 7, threaded rod; 8, limiting plate; 9, limiting nut; 10, main screw cap; 11, fastening spring; 12, mounting sheet; 13, shock pad. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] The utility model provides a high strength check bolt, such as Figures 1-4 As shown, the high strength check bolt, including main screw rod 1, the lower surface of main screw rod 1 is connected with limiting component in screw thread, the outer surface of main screw rod 1 is connected with fastening nut 2 in screw thread, the both sides of fastening nut 2 outer surface are fixedly connected with extension plate 3, the lower surface of extension plate 3 is equipped with circular groove, and the inside of circular groove is inserted with connecting component;

[0022] Limiting component includes vice screw rod 4, the outer surface of vice screw rod 4 is connected in screw thread to the lower surface of main screw rod 1, the bottom of vice screw rod 4 is fixedly connected with vice nut 5, the both sides of vice nut 5 outer surface are fixedly connected with connecting plate 6, and vice nut 5 can be screwed tightly vice screw rod 4 main screw rod 1 bottom, and then connecting plate 6 can be connected with extension plate 3 through threaded rod 7, because the thread parameters of main screw rod 1 and vice screw rod 4 are different, so that vice nut 5 and fastening nut 2 are mutually matched and produce the jamming effect after being tightened, thereby effectively preventing main screw rod 1 and fastening nut 2 from rotating in the continuous vibration, and further improving the overall stability of connection, enhancing the anti-loose performance, further guaranteeing the safety and reliability of the connection part under complex working conditions.

[0023] Connecting component includes threaded rod 7, the top of threaded rod 7 is inserted in the inside of circular groove, the upper portion of threaded rod 7 outer surface is fixedly connected with limiting plate 8, the lower portion of threaded rod 7 outer surface is connected with limiting nut 9 in screw thread, so that the top of threaded rod 7 is inserted into the inside of circular groove, limiting plate 8 limits threaded rod 7, avoids threaded rod 7 from passing through circular groove too much, then limiting nut 9 is screwed downward, and connecting plate 6 is pushed, and the position of threaded rod 7 can be limited, so that connecting plate 6 can be connected with extension plate 3 by threaded rod 7, because the thread parameters of main screw rod 1 and vice screw rod 4 are different, so that vice nut 5 and fastening nut 2 are mutually matched and produce the jamming effect after being tightened.

[0024] One side of connecting plate 6 is equipped with recess, and recess is matched with threaded rod 7, and recess is convenient for threaded rod 7 to be clamped into the inside of connecting plate 6 and be fixed.

[0025] The top of main screw rod 1 is fixedly connected with main nut 10, and the lower surface of main nut 10 is fixedly connected with fastening component, and the main screw rod 1 is limited by main nut 10, so as to facilitate the rotation of fastening nut 2 and vice nut 5.

[0026] The fastening assembly comprises a fastening spring 11, the top end of which is fixedly connected to the lower surface of the main nut 10, the bottom end of which is fixedly connected with a mounting sheet 12, the lower surface of which is fixedly connected with a shock pad 13, the fastening spring 11 pushes the mounting sheet 12, and the shock pad 13 can improve the fastening between the main nut 10 and the fixed article and reduce the transmission of vibration, further improving the stability of the fixed article.

[0027] The middle part of the upper surface of the mounting sheet 12 and the shock pad 13 is provided with a through groove, the inside of which is slidably connected to the upper part of the outer surface of the main screw 1, the mounting sheet 12 and the shock pad 13 are penetrated through the outer surface of the main screw 1 and can slide up and down with the contraction of the fastening spring 11 to meet the fastening needs.

[0028] Working steps: first, the main screw 1 is inserted through the inside of the article to be connected, and then a tool is prepared to limit the main nut 10, at the same time, the fastening nut 2 is rotated to complete the connection of the article, then the fastening spring 11 pushes the mounting sheet 12, and the shock pad 13 can improve the fastening between the main nut 10 and the fixed article, secondly, the bottom end of the main screw 1 is screwed by the secondary nut 5, finally, the top end of the threaded rod 7 is inserted into the circular groove, the limiting plate 8 limits the threaded rod 7, avoids the threaded rod 7 from penetrating through the circular groove too much, and the limiting nut 9 is screwed downward to push the connecting plate 6, the position of the threaded rod 7 is limited, so that the connecting plate 6 and the extension plate 3 are connected by the threaded rod 7, and because the threaded parameters of the main screw 1 and the secondary screw 4 are different, the secondary nut 5 and the fastening nut 2 are matched and jammed after being tightened.

[0029] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A high-strength anti-loosening bolt, comprising a main threaded rod (1), characterized in that: The lower surface of the main screw (1) is threaded with a limit assembly, and the outer surface of the main screw (1) is threaded with a fastening nut (2). Both sides of the outer surface of the fastening nut (2) are fixedly connected with extension plates (3). The lower surface of the extension plate (3) is provided with a circular groove, and a connecting assembly is inserted into the inside of the circular groove. The limiting component includes a secondary screw (4), the outer surface of which is threaded to the lower surface of the main screw (1), and a secondary nut (5) is fixedly connected to the bottom end of the secondary screw (4). Connecting plates (6) are fixedly connected to both sides of the outer surface of the secondary nut (5).

2. The high-strength anti-loosening bolt according to claim 1, characterized in that: The connecting assembly includes a threaded rod (7), the top end of which is inserted into the interior of a circular groove. A limiting plate (8) is fixedly connected to the upper part of the outer surface of the threaded rod (7), and a limiting nut (9) is threadedly connected to the lower part of the outer surface of the threaded rod (7).

3. The high-strength anti-loosening bolt according to claim 1, characterized in that: The connecting plate (6) has a groove on one side, which is adapted to the threaded rod (7).

4. A high-strength anti-loosening bolt according to claim 1, characterized in that: The top end of the main screw (1) is fixedly connected to a main nut (10), and the lower surface of the main nut (10) is fixedly connected to a fastening assembly.

5. A high-strength anti-loosening bolt according to claim 4, characterized in that: The fastening assembly includes a fastening spring (11), the top end of which is fixedly connected to the lower surface of the main nut (10), and the bottom end of which is fixedly connected to a mounting plate (12), and the lower surface of the mounting plate (12) is fixedly connected to a shock-absorbing pad (13).

6. A high-strength anti-loosening bolt according to claim 5, characterized in that: Both the mounting plate (12) and the shock-absorbing pad (13) have through grooves in the middle of their upper surfaces, and the inside of the through grooves is slidably connected to the upper part of the outer surface of the main screw (1).

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