Lock nut

Abstract

The locknut comprises a body, and a threaded hole for a bolt to be screwed in is formed in a center shaft of the body in a penetrating mode. A threaded hole is formed in the body, a mounting seat is further arranged on the body, a mounting groove coaxial with the threaded hole is formed in the mounting seat, a nylon anti-loosening cover is coaxially arranged on the mounting seat, a limiting ring is integrally formed on the outer circumferential surface of the nylon anti-loosening cover, and the limiting ring is inserted into the mounting groove; the nylon anti-loosening cover is limited and fixed on the mounting seat through the limiting ring; a chuck is coaxially arranged on the side, away from the nylon anti-loosening cover, of the body, a clamping jaw used for being inserted into an external thread groove of a bolt is arranged on the side wall of an inner ring of the chuck, and the clamping jaw is arranged in the mode of inclining outwards in the direction away from the body. According to the anti-loose bolt, the body can be stably and firmly fixed to the outer portion of the bolt, and then the good anti-loose effect can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of fasteners, and in particular to a locking nut. Background Art

[0002] Currently, nuts are threaded fasteners, and their important advantage is that they can be disassembled and reused. Usually, nuts need to be used in conjunction with bolts. By tightening the nuts on the external thread surface of the bolts, the workpiece is fastened with the help of pre-tightening force. However, in actual applications, with the vibration of the workpiece or the action of external forces, traditional nuts can easily loosen along the external threads on the bolts, causing the fastened workpiece to loosen or fall off. Utility Model Content

[0003] The present application provides an anti-loosening nut, which has excellent anti-loosening effect and a more stable and reliable connection.

[0004] The anti-loosening nut provided in this application adopts the following technical solution:

[0005] A locking nut comprises a main body, a threaded hole for screwing a bolt through the central axis of the main body; a mounting seat is further provided on the main body, a mounting groove coaxial with the threaded hole is provided in the mounting seat, a nylon locking cover is coaxially provided on the mounting seat, a limiting ring is integrally formed on the outer circumferential surface of the nylon locking cover, the limiting ring is inserted into the mounting groove, and the nylon locking cover is fixed on the mounting seat by the limiting ring; a chuck is coaxially provided on the side of the main body away from the nylon locking cover, a claw for inserting into the external thread groove of the bolt is provided on the inner ring side wall of the chuck, and the claw is inclined obliquely outward in the direction away from the main body.

[0006] By adopting the above technical solution: when the bolt is tightened in the threaded hole, the inner wall of the nylon anti-loosening cover and the outer thread surface of the bolt contact each other, which can effectively improve the situation where the body and the bolt loosen due to relative rotation, and the nylon anti-loosening cover will be tightly clamped on the outer thread surface of the bolt, so that the body can be stably and firmly fixed on the outside of the bolt, thereby achieving a better anti-loosening effect; in addition, the nylon anti-loosening cover is limited in the mounting groove by an external limiting ring, thereby ensuring that the nylon anti-loosening cover is stably and firmly fixed on the mounting seat, so that the nylon anti-loosening cover is not easy to separate from the mounting seat; and the chuck is used to contact the surface of the workpiece, and when the body is tightened on the bolt, the chuck will be pressed against the surface of the workpiece, and the claws will be inserted into the outer thread groove of the bolt, and the rotation of the body can be further restricted under the limitation of the claws, thereby further enhancing the anti-loosening effect of the body.

[0007] Preferably, a plurality of plug blocks are arranged on the side wall of the main body facing the mounting seat, and insertion holes corresponding to the plug blocks are arranged on the side wall of the nylon anti-loosening cover facing the plug blocks, and the plug blocks are respectively inserted into their respective relative insertion holes along the direction in which the nylon anti-loosening cover is inserted into the mounting seat.

[0008] Preferably, a first guide arc surface is integrally formed on the side wall of the limiting ring facing the main body, and the first guide arc surface is circumferentially arranged on the outer circumference of the limiting ring; a second guide arc surface is integrally formed on the inner ring side wall of the mounting seat away from the main body, and the second guide arc surface is circumferentially arranged on the inner ring side wall of the mounting seat.

[0009] Preferably, a plurality of connecting strips are provided between the nylon anti-loosening cover and the chuck, and the nylon anti-loosening cover and the chuck are connected to each other through the connecting strips.

[0010] Preferably, a fixing column corresponding to the connecting strip is arranged on the side of the nylon anti-loosening cover away from the main body, and the connecting strip is penetrated with fixing holes for inserting the respective opposite fixing columns, and one end of the connecting strip away from the fixing column is connected and fixed to the chuck.

[0011] Preferably, a clearance groove is provided on the outer side wall of the body facing the chuck, the chuck is arranged in the clearance groove, and the claw extends from the clearance groove to the outside of the body.

[0012] Preferably, a limiting block is arranged on the inner side wall of the giving way groove, and a limiting groove corresponding to the limiting block is arranged on the circumferential outer side wall of the chuck, and the limiting blocks are respectively inserted into their respective relative limiting grooves, and the shape of the limiting blocks is adapted to the shape of the limiting grooves.

[0013] In summary, the present application includes at least one of the following beneficial technical effects:

[0014] 1. The inner wall of the nylon anti-loosening cover and the outer thread surface of the bolt are in contact with each other, which can effectively improve the situation where the body and the bolt rotate relative to each other and become loose. The nylon anti-loosening cover will be tightly stuck on the outer thread surface of the bolt, so that the body can be stably and securely fixed to the outside of the bolt, thereby achieving a better anti-loosening effect;

[0015] 2. It can ensure that the nylon anti-loosening cover is stably and securely fixed on the mounting base, so that the nylon anti-loosening cover is not easy to separate from the mounting base;

[0016] 3. The rotation of the main body can be further restricted under the limit of the claw, thereby further enhancing the anti-loosening effect of the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0018] Figure 2yes Figure 1 Schematic diagram of the local structure explosion;

[0019] Figure 3 It is prominent Figure 2 Schematic diagram of the structure explosion from bottom perspective.

[0020] Explanation of the reference numerals: 1. body; 10. threaded hole; 11. mounting seat; 12. mounting groove; 13. plug-in block; 14. second guide arc surface; 15. clearance groove; 150. limit block; 2. nylon anti-loosening cover; 20. limiting ring; 21. plug-in hole; 22. first guide arc surface; 23. fixing column; 3. chuck; 30. claw; 31. limiting groove; 4. connecting strip; 40. fixing hole. DETAILED DESCRIPTION

[0021] The present application is further described in detail below in conjunction with the accompanying drawings.

[0022] The embodiment of the present application discloses a locking nut.

[0023] Reference Figure 1 , Figure 2 The anti-loosening nut includes a body 1, and a threaded hole 10 for screwing a bolt is passed through the central axis of the body 1. A mounting seat 11 coaxial with the threaded hole 10 is also provided on the outer wall of the body 1, and a mounting groove 12 coaxial with the threaded hole 10 is provided in the mounting seat 11. A nylon anti-loosening cover 2 with a certain elastic deformation ability is provided on the mounting seat 11 through the mounting groove 12, and the nylon anti-loosening cover 2 is coaxially arranged with the threaded hole 10.

[0024] like Figure 2 , Figure 3 As shown, a limiting ring 20 is integrally formed on the outer circumferential surface of the nylon anti-loosening cover 2, and the limiting ring 20 is inserted into the mounting groove 12 along the radial direction of the body 1, and the nylon anti-loosening cover 2 is fixed on the mounting seat 11 by the limiting ring 20. A plurality of plug blocks 13 located in the mounting groove 12 are fixedly arranged on the side wall of the body 1 facing the mounting seat 11, and plug holes 21 corresponding to the plug blocks 13 are arranged on the side wall of the nylon anti-loosening cover 2 facing the plug blocks 13. The plug blocks 13 are respectively inserted into the respective relative plug holes 21 along the direction in which the nylon anti-loosening cover 2 is inserted into the mounting seat 11. By the mutual plug-in cooperation between the plug blocks 13 and the plug holes 21, the relative rotation between the nylon anti-loosening cover 2 and the mounting seat 11 can be limited, thereby further improving the anti-loosening effect of the nylon anti-loosening cover 2.

[0025] like Figure 2 , Figure 3As shown, the first guide arc surface 22 is integrally formed on the side wall of the limiting ring 20 facing the body 1, and the first guide arc surface 22 is circumferentially arranged on the outer circumference of the limiting ring 20. The second guide arc surface 14 is integrally formed on the inner ring side wall of the mounting seat 11 away from the body 1, and the second guide arc surface 14 is also circumferentially arranged on the inner ring side wall of the mounting seat 11. When the nylon anti-loosening cover 2 is pressed into the mounting seat 11, under the joint guidance of the first guide arc surface 22 and the second guide arc surface 14, the limiting ring 20 can be assisted to pass over the second guide arc surface 14 more smoothly and finally inserted into the mounting groove 12.

[0026] like Figure 2 , Figure 3 As shown, a chuck 3 is coaxially mounted on the side of the body 1 away from the nylon anti-loosening cover 2. The chuck 3 is coaxially arranged with the threaded hole 10, and the chuck 3 is made of plastic with a certain elastic deformation ability. A plurality of claws 30 for inserting into the external thread groove of the bolt are integrally formed on the inner ring side wall of the chuck 3. The claws 30 are arranged on the inner ring side wall of the chuck 3 at uniform intervals in the circumferential direction, and the claws 30 are arranged obliquely outward in the direction away from the body 1. When the body 1 is tightened on the bolt, the chuck 3 will be pressed against the surface of the workpiece, and the claws 30 will be inserted into the external thread groove of the bolt. Under the limit of the claws 30, the rotation of the body 1 can be further restricted, thereby further enhancing the anti-loosening effect of the body 1.

[0027] like Figure 2 , Figure 3 As shown, a clearance groove 15 is provided on the outer side wall of the body 1 facing the chuck 3, the chuck 3 is arranged in the clearance groove 15, and the claw 30 extends from the clearance groove 15 to the outside of the body 1. A limiting block 150 is integrally formed on the inner side wall of the clearance groove 15, and a limiting groove 31 corresponding to the limiting block 150 is provided on the circumferential outer side wall of the chuck 3. The shape of the limiting groove 31 is adapted to the shape of the limiting block 150, and the limiting blocks 150 are respectively inserted into the respective relative limiting grooves 31. By the mutual plug-in cooperation between the limiting block 150 and the limiting groove 31, the relative rotation of the chuck 3 in the clearance groove 15 can be limited.

[0028] like Figure 2 , Figure 3As shown, a plurality of connecting strips 4 are arranged between the nylon anti-loosening cover 2 and the chuck 3. The connecting strips 4 are also made of plastic with a certain elastic deformation ability. One end of the connecting strip 4 is integrally formed on the chuck 3, and the other end of the connecting strip 4 is arranged on the nylon anti-loosening cover 2. The nylon anti-loosening cover 2 and the chuck 3 are mutually connected and fixed through the connecting strips 4. The side of the nylon anti-loosening cover 2 facing away from the body 1 is integrally formed with fixing posts 23 corresponding to the connecting strips 4 one by one. The side walls of the connecting strips 4 facing the respective fixing posts 23 are penetrated with fixing holes 40 for inserting the respective opposite fixing posts 23. The connecting strips 4 are fixed to the nylon anti-loosening cover 2 by the mutual plug-in cooperation of the fixing posts 23 and the fixing holes 40.

[0029] The nylon anti-loosening cover 2 and the chuck 3 are connected and fixed by the connecting strip 4, so that a mutual connection between the two can be established, thereby further enhancing the limiting effect of the nylon anti-loosening cover 2 and the chuck 3, so that the nylon anti-loosening cover 2 and the chuck 3 are more stably and firmly fixed on the main body 1.

[0030] The implementation principle is: when the bolt is tightened in the threaded hole 10, the inner wall of the nylon anti-loosening cover 2 and the outer thread surface of the bolt are mutually interfered, which can effectively improve the situation that the body 1 and the bolt rotate relative to each other and become loose. The nylon anti-loosening cover 2 will be tightly clamped on the outer thread surface of the bolt, so that the body 1 can be stably and securely fixed to the outside of the bolt, thereby achieving a better anti-loosening effect. In addition, the nylon anti-loosening cover 2 is limited in the mounting groove 12 by the external limiting ring 20, so that the nylon anti-loosening cover 2 can be stably and securely fixed on the mounting seat 11, so that the nylon anti-loosening cover 2 is not easy to be separated from the mounting seat 11. The chuck 3 is used to contact the surface of the workpiece. When the body 1 is tightened on the bolt, the chuck 3 will be pressed against the surface of the workpiece, and the claw 30 will be inserted into the outer thread groove of the bolt. Under the limitation of the claw 30, the rotation of the body 1 can be further limited, thereby enhancing the anti-loosening effect of the body 1 again.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A locking nut, comprising a body (1), wherein a threaded hole (10) for a bolt to be screwed into passes through the central axis of the body (1); characterized in that: The main body (1) is also provided with a mounting seat (11), a mounting groove (12) coaxial with the threaded hole (10) is provided in the mounting seat (11), a nylon anti-loosening cover (2) is coaxially provided on the mounting seat (11), a limiting ring (20) is integrally formed on the outer circumferential surface of the nylon anti-loosening cover (2), the limiting ring (20) is inserted into the mounting groove (12), and the nylon anti-loosening cover (2) is fixed on the mounting seat (11) by the limiting ring (20); a chuck (3) is coaxially provided on the side of the main body (1) away from the nylon anti-loosening cover (2), a claw (30) for inserting into the external thread groove of the bolt is provided on the inner ring side wall of the chuck (3), and the claw (30) is inclined outwardly in a direction away from the main body (1).

2. A locking nut according to claim 1, characterized in that: A plurality of plug blocks (13) are arranged on the side wall of the body (1) facing the mounting seat (11), and insertion holes (21) corresponding to the insertion blocks (13) are arranged on the side wall of the nylon anti-loosening cover (2) facing the insertion blocks (13). The insertion blocks (13) are respectively inserted into the respective opposite insertion holes (21) along the direction in which the nylon anti-loosening cover (2) is inserted into the mounting seat (11).

3. The anti-loosening nut according to claim 1, characterized in that: A first guide arc surface (22) is integrally formed on the side wall of the limiting ring (20) facing the main body (1), and the first guide arc surface (22) is circumferentially arranged on the outer circumference of the limiting ring (20); a second guide arc surface (14) is integrally formed on the inner ring side wall of the mounting seat (11) away from the main body (1), and the second guide arc surface (14) is circumferentially arranged on the inner ring side wall of the mounting seat (11).

4. The anti-loosening nut according to claim 1, characterized in that: A plurality of connecting strips (4) are provided between the nylon anti-loosening cover (2) and the chuck (3), and the nylon anti-loosening cover (2) and the chuck (3) are connected to each other via the connecting strips (4).

5. A locking nut according to claim 4, characterized in that: A fixing column (23) corresponding to the connecting strip (4) is arranged on the side of the nylon anti-loosening cover (2) facing away from the main body (1); fixing holes (40) are passed through the connecting strip (4) for inserting the fixing columns (23) facing each other; and one end of the connecting strip (4) away from the fixing column (23) is connected and fixed to the chuck (3).

6. A locking nut according to claim 5, characterized in that: A clearance groove (15) is arranged on the outer side wall of the body (1) facing the chuck (3), the chuck (3) is arranged in the clearance groove (15), and the clamping claw (30) extends from the clearance groove (15) to the outside of the body (1).

7. A locking nut according to claim 6, characterized in that: A limiting block (150) is arranged on the inner side wall of the clearance groove (15), and a limiting groove (31) corresponding to the limiting block (150) is arranged on the circumferential outer side wall of the chuck (3). The limiting blocks (150) are respectively inserted into the respective opposite limiting grooves (31), and the shape of the limiting blocks (150) is adapted to the shape of the limiting grooves (31).

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