Anti-fatigue bolt and nut

Abstract

The utility model belongs to the technical field of bolts and nuts, and particularly relates to an anti-fatigue bolt and nut which comprises a bolt and a nut in threaded connection with the bolt, the bolt comprises a nut, a hexagonal column and a screw, the nut is connected with the screw through the hexagonal column, square grooves are formed in the two sides of the screw, and the square grooves are connected with the nut. The screw rod is sleeved with an anti-fatigue locking piece which is in mutual limiting sliding connection with the square groove, a threaded lock head is integrally formed at the outer end of the anti-fatigue locking piece, a threaded sleeve which is in mutual threaded locking connection with the threaded lock head is arranged at the inner side end of the nut, and the nut is in locking connection with the external thread teeth on the screw rod through a locking thread pair. The anti-fatigue locking piece is matched with the nut and the screw rod to rotate in a threaded mode so that equipment can be locked and installed. The anti-fatigue locking piece is limited by the limiting block and the square groove, so that rotation of the nut on the screw rod is limited, and when equipment vibrates, rotation of the nut on the outer side wall of the screw rod caused by the vibration environment is avoided, looseness of the equipment fastened by the bolt is avoided, and stable operation of the equipment is prevented from being affected.

Description

Technical Field

[0001] This utility model belongs to the field of bolt and nut technology, and specifically relates to a fatigue-resistant bolt and nut. Background Technology

[0002] Bolts are essential components in daily life and industrial manufacturing, widely used in electronic products, mechanical products, digital products, power equipment, and electromechanical products. They are also used in ships, vehicles, water conservancy projects, and even chemical experiments. For example, in power equipment, high fatigue-resistant bolts have high fatigue resistance while providing sufficient tightening axial force.

[0003] A search revealed Chinese Patent Publication No. CN208487113U, which discloses an anti-loosening bolt assembly comprising a bolt, a nut, and a locking plate. The bolt has an external thread on its shank, and the nut has an internal thread corresponding to the external thread. First, the nut and bolt are tightened. Then, from the side of the nut furthest from the nut, the locking pins are inserted into corresponding slots, and the locking plate is fitted onto the shank. This prevents relative loosening between the nut and bolt in the circumferential direction, preventing the nut from loosening or even falling off.

[0004] The above-mentioned anti-loosening bolt assembly has problems during use: the locking plate is sleeved on the screw rod. When operating in an environment with frequent vibrations caused by strong winds, the locking plate is easily affected and detaches from the screw rod, which causes the bolt and nut to loosen. The nut is prone to loosening and stress fatigue, which in turn affects the stable operation of the power equipment. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides an anti-fatigue bolt and nut. The anti-fatigue locking component, in conjunction with the nut and screw thread rotation, locks the equipment in place. The anti-fatigue locking component is limited by a limiting block and a square groove, thereby restricting the nut's rotation on the screw. During equipment vibration, this prevents the nut from rotating on the outer wall of the screw due to vibration, thus preventing the bolt from loosening and ensuring stable equipment operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fatigue-resistant bolt and nut, comprising a bolt and a nut threadedly connected to the bolt. The bolt includes a nut, a hexagonal post, and a bolt. The nut is connected to the bolt via the hexagonal post. A bearing flange is connected to the upper limit of the hexagonal post. Square grooves are provided on both sides of the bolt. A fatigue-resistant locking member is fitted on the bolt and is mutually limited and slidably connected to the square grooves. A threaded lock head is integrally formed on the outer end of the fatigue-resistant locking member. A threaded sleeve is provided on the inner end of the nut and is threadedly locked to the threaded lock head. The nut is locked to the external thread on the bolt via a locking thread pair.

[0007] As a preferred embodiment, the bottom surface of the nut is provided with several limiting protrusions, the bearing flange is sleeved on the hexagonal post, and is fitted and connected to the nut through the limiting hole and the limiting protrusions.

[0008] As a preferred embodiment, the anti-fatigue locking component has an anti-loosening limiting block on its inner side, and the anti-fatigue locking component slides on the screw through the limiting block.

[0009] As a preferred embodiment, the fatigue-resistant locking component is driven to move toward the nut by the rotation of the nut and screw threads.

[0010] As a preferred embodiment, the diameter of the threaded sleeve is larger than the diameter of the screw.

[0011] As a preferred embodiment, the inner end face of the fatigue-resistant locking component is provided with a plurality of supporting anti-slip protrusions.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model integrates the nut, hexagonal post, and screw into a bolt structure, improving the overall strength of the bolt; the bearing flange is fitted onto the outer wall of the hexagonal post at multiple angles through the screw; and the limiting protrusion is adapted to fit and connect with the nut to prevent the bearing flange from shifting during the locking process.

[0014] In use, the anti-fatigue locking component slides onto the screw rod via the limiting block. As the nut rotates on the screw rod's thread, it pushes the anti-fatigue locking component towards the nut until it contacts the equipment. Further rotation of the nut, through the threaded sleeve and threaded lock head, locks the anti-fatigue locking component together, securing the equipment firmly. The anti-fatigue locking component is restricted by the limiting block and the square groove, limiting the rotation of both the anti-fatigue locking component and the nut. This restricts the nut's rotation on the screw rod, preventing the nut from rotating on the outer wall of the screw rod during equipment vibration, thus preventing the anti-fatigue locking component from loosening its connection to the nut and ensuring stable equipment operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a front view structural diagram of the present utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the isometric cross-sectional structure of the AA plane.

[0018] Figure 4 This is a schematic diagram of the bolt structure in this utility model;

[0019] Figure 5This is a schematic diagram of the anti-fatigue locking component in this utility model;

[0020] Figure 6 This is a schematic diagram of the nut structure in this utility model;

[0021] Figure 7 This is a schematic diagram of the assembly of the fatigue-resistant locking component and the nut in this utility model;

[0022] Figure 8 This utility model Figure 7 A schematic diagram of the isometric cross-sectional structure of the BB plane.

[0023] Explanation of icon numbers:

[0024] 1. Bolt; 11. Screw; 12. Hexagonal post; 13. Screw; 14. Square groove; 15. External thread; 16. Limiting protrusion;

[0025] 2. Nut; 21. Screw insert; 22. Locking thread pair;

[0026] 3. Anti-fatigue locking components; 31. Threaded lock head; 32. Supporting anti-slip protrusions; 33. Limiting blocks;

[0027] 4. Load-bearing flange. Detailed Implementation

[0028] 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.

[0029] Example 1

[0030] Please see Figure 1-8This utility model provides the following technical solution: a fatigue-resistant bolt and nut, comprising a bolt 1 and a nut 2 threadedly connected to the bolt 1. The bolt 1 includes a nut 11, a hexagonal post 12, and a screw 13. The nut 11 is connected to the screw 13 via the hexagonal post 12. A bearing flange 4 is connected to the upper limit of the hexagonal post 12. Square grooves 14 are provided on both sides of the screw 13. A fatigue-resistant locking member 3 is fitted on the screw 13 and is mutually limited and slidably connected to the square grooves 14. A threaded locking head 31 is integrally formed on the outer end of the fatigue-resistant locking member 3. A threaded sleeve 21 is provided on the inner end of the nut 2 and is threadedly locked to the threaded locking head 31. The nut 2 is locked to the external thread 15 on the screw 13 via a locking thread pair 22. An anti-loosening limiting block 33 is provided on the inner side of the fatigue-resistant locking member 3, and the fatigue-resistant locking member 3 slides on the screw 13 via the limiting block 33. The anti-fatigue locking component 3 moves towards the nut 11 through the threaded rotation of the nut 2 and the screw 13. In this embodiment, the anti-fatigue locking component 3 slides on the screw 13 through the limiting block 33. As the nut 2 rotates on the screw 13, it pushes the inner end of the anti-fatigue locking component 3 towards the nut 11 until it comes into contact with the locking device. The nut 2 is further rotated and locked together with the anti-fatigue locking component 3 through the threaded sleeve 21 and the threaded lock head 31, thus fastening the equipment. The anti-fatigue locking component 3 is restricted by the mutual limiting of the limiting block 33 and the square groove 14, and the rotation of the anti-fatigue locking component 3 and the nut 2 is restricted, thereby restricting the rotation of the nut 2 on the screw 13. When the equipment vibrates, the vibration environment is prevented from causing the nut 2 to rotate on the outer wall of the screw 13, and the equipment fastened to the anti-fatigue locking component 3 and the nut 11 is prevented from loosening, thus avoiding affecting the stable operation of the equipment.

[0031] In this embodiment, the bottom surface of the nut 11 is provided with a plurality of limiting protrusions 16. The bearing flange 4 is sleeved on the hexagonal post 12 and is fitted and connected to the nut 11 through the limiting hole and the limiting protrusions 16. The bearing flange 4 is fitted onto the outer wall of the hexagonal post 12 at multiple angles through the screw 13. The bearing flange 4 is fitted and connected to the nut 11 through the limiting protrusions 16 to prevent the bearing flange 4 from shifting during the locking process.

[0032] In this embodiment, the diameter of the threaded sleeve 21 is larger than the diameter of the screw 13.

[0033] In this embodiment, the inner end face of the anti-fatigue locking member 3 is provided with a plurality of supporting anti-slip protrusions 32.

[0034] The working principle and usage process of this utility model are as follows: The nut 11, hexagonal column 12, and screw 13 of this utility model are integrally formed into a bolt 1 structure, which improves the overall strength of the bolt; the bearing flange 4 is passed through the screw 13 and fitted onto the outer wall of the hexagonal column 12 at multiple angles; and the limiting protrusion 16 is adapted to fit and connect with the nut 11 to prevent the bearing flange 4 from shifting during the locking process;

[0035] In use, the anti-fatigue locking component 3 is slid onto the screw 13 via the limiting block 33. As the nut 2 rotates on the screw 13, it pushes the inner end of the anti-fatigue locking component 3 toward the nut 11 until it comes into contact with the locking device. The nut 2 is then rotated and locked together with the anti-fatigue locking component 3 via the threaded sleeve 21 and the threaded lock head 31, thus securing the equipment. The anti-fatigue locking component 3 is restricted by the mutual limiting of the limiting block 33 and the square groove 14, limiting the rotation of the anti-fatigue locking component 3 and the nut 2. This restricts the rotation of the nut 2 on the screw 13, preventing the nut 2 from rotating on the outer wall of the screw 13 during equipment vibration, and preventing the anti-fatigue locking component 3 from loosening its connection with the nut 11, thus avoiding any impact on the stable operation of the equipment.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fatigue-resistant bolt and nut, comprising a bolt (1) and a nut (2) threadedly connected to the bolt (1), characterized in that: The bolt (1) includes a nut (11), a hexagonal column (12), and a screw (13). The nut (13) is connected to the screw (13) through the hexagonal column (12). The hexagonal column (12) is connected to a bearing flange (4) at its upper limit. Square grooves (14) are provided on both sides of the screw (13). An anti-fatigue locking part (3) is fitted on the screw (13) and is mutually limited and slidably connected with the square grooves (14). A threaded lock head (31) is integrally formed on the outer end of the anti-fatigue locking part (3). A threaded sleeve (21) is provided on the inner end of the nut (2) and is mutually threadedly locked to the threaded lock head (31). The nut (2) is locked to the external thread (15) on the screw (13) through a locking thread pair (22).

2. The fatigue-resistant bolt and nut according to claim 1, characterized in that: The bottom surface of the nut (11) is provided with several limiting protrusions (16), and the bearing flange (4) is sleeved on the hexagonal column (12) and is connected to the nut (11) through the limiting hole and the limiting protrusions (16).

3. The fatigue-resistant bolt and nut according to claim 1, characterized in that: The anti-fatigue locking component (3) is provided with a limiting block (33) to prevent loosening on the inner side, and the anti-fatigue locking component (3) slides on the screw (13) through the limiting block (33).

4. The fatigue-resistant bolt and nut according to claim 3, characterized in that: The fatigue-resistant locking component (3) is driven to move toward the nut (11) by the threaded rotation of the nut (2) and the screw (13).

5. The fatigue-resistant bolt and nut according to claim 1, characterized in that: The diameter of the sleeve (21) is larger than the diameter of the screw (13).

6. The fatigue-resistant bolt and nut according to claim 3, characterized in that: The anti-fatigue locking component (3) has several supporting anti-slip protrusions (32) on its inner end face.

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