A high-temperature alloy self-locking nut

Abstract

The utility model provides a kind of high-temperature alloy self-locking nut, belong to fastening parts technical field. Including bolt and the nut of threaded sleeve in bolt, still include locking ring, locking ring is sleeved on screw rod and is located the side of nut close to bolt head, locking ring and screw rod are guided by guide block and guide groove linear sliding, locking ring and nut are limited nut one-way rotation relative to locking ring along the direction of screw rod backoff by ratchet ring and ratchet part. By locking ring limit nut independent rotation with locking ring, and locking ring is again limited rotation under the cooperation of guide block and guide groove, to realize the rotation backoff of nut relative to bolt, play the role of self-locking, with the advantage of improving the stable connection effect of bolt, nut.

Description

Technical Field

[0001] This utility model relates to the field of fastening parts technology, and in particular to a high-temperature alloy self-locking nut. Background Technology

[0002] Bolts and nuts are the most common fastener structures in industry today. Different products and equipment use different specifications of bolts and nuts, and their connection structure is safe and reliable.

[0003] In some scenarios, the environment in which the equipment is located experiences severe or continuous vibrations. These vibrations can easily cause the nuts to loosen from their fastened state and amplify the impact, resulting in abnormal noises or even other unsafe conditions. Regular maintenance and repair of the equipment by staff are required. Therefore, a bolt with a self-locking function is needed to address the situation where the nuts retract in harsh working environments. Utility Model Content

[0004] In view of the above problems, this utility model provides a high-temperature alloy self-locking nut.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-temperature alloy self-locking nut is provided, comprising a bolt and a nut threaded onto the bolt. The bolt includes a head and a threaded rod. The bolt passes through a through hole in a workpiece and is threadedly connected to the nut. The nut also includes a locking ring, which is sleeved on the threaded rod and located on the side of the nut closer to the bolt head. The bolt is provided with a first limiting element for limiting and fixing to the workpiece. A second limiting element is provided between the locking ring and the threaded rod for cooperating and limiting the rotation of the locking ring. A third limiting element is provided between the locking ring and the nut for limiting the rotation of the nut relative to the locking ring in the direction of loosening the nut.

[0006] Furthermore, the first limiting member includes an extrusion part with a polygonal cross-section. The circumscribed circle of the extrusion part is larger than the size of the through hole on the workpiece. The extrusion part is located between the head and the screw, and the bolt is interference-fitted into the through hole through the extrusion part.

[0007] Furthermore, the extrusion section has a tapered / spherical guide at one end near the screw.

[0008] Furthermore, the second limiting component includes a guide block, and a guide groove is provided on the screw along its own length direction. The guide block is fixedly installed on the inner wall of the locking ring, and the guide block and the guide groove slide in a linear manner.

[0009] Furthermore, the third limiting component includes a ratchet ring and a ratchet portion. The ratchet ring is coaxially fixed on the side of the nut near the locking ring. Multiple ratchet teeth are provided on the ratchet ring along the self-locking circumference. The ratchet portion is fixedly provided on the side of the locking ring near the nut. The ratchet portion cooperates with the ratchet ring to restrict the nut from rotating relative to the locking ring in the direction of the screw being unscrewed.

[0010] Furthermore, the locking ring has a telescopic notch, and the ratchet part on the locking ring is located at one end of the telescopic notch. The ratchet part on the locking ring and the adjacent guide block elastically tilt towards the side where the ratchet part is located.

[0011] The beneficial effects of this utility model are as follows: When using the self-locking nut, the bolt is passed through the through hole on the workpiece, and the locking ring and nut are sequentially installed on the bolt shank. The guide block on the locking ring slides in cooperation with the guide groove on the bolt shank. During the tightening of the nut, the ratchet part on the locking ring cooperates with the ratchet ring on the nut to rotate unidirectionally and restrict the return. After installation, the locking ring restricts the nut from rotating independently of the locking ring, while the locking ring is restricted from rotating by the cooperation of the guide block and the guide groove, thereby realizing the rotation and return of the nut relative to the bolt, playing a self-locking and fixing role, and improving the stable connection effect of the bolt and nut. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the self-locking nut and bolt connection assembly according to an embodiment of this application.

[0013] Figure 2 This is a structural schematic diagram of the self-locking bolt and nut in the disassembly state according to an embodiment of this application.

[0014] Among them, 1. Bolt; 11. Head; 12. Screw; 13. Extrusion part; 14. Guide part; 15. Guide groove; 2. Nut; 21. Ratchet ring; 3. Locking ring; 31. Guide block; 32. Ratchet part; 33. Expansion notch. Detailed Implementation

[0015] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0016] This application discloses a high-temperature alloy self-locking nut 2, as shown in the embodiments below. Figure 1 and Figure 2 The device includes a bolt 1 and a nut 2 threaded onto the bolt 1. The bolt 1 consists of a head 11 and a threaded rod 12. After passing through a through hole in the workpiece to be locked, the bolt 1 is threadedly connected to the nut 2, so that the head 11 of the bolt 1 and the nut 2 respectively abut against the two sides of the workpiece to be locked. In this embodiment, a locking ring 3 is also included. The locking ring 3 is sleeved on the threaded rod 12 and located between the nut 2 and the workpiece to be locked. A first limiting member is provided on the bolt 1 for limiting and fixing with the workpiece. A second limiting member is provided between the locking ring 3 and the threaded rod 12 for cooperating to limit the rotation of the locking ring 3. A third limiting member is provided between the locking ring 3 and the nut 2 for limiting the rotation of the nut 2 relative to the locking ring 3 in the direction of loosening the nut 2.

[0017] In this embodiment, after the bolt 1 passes through the through hole, the locking ring 3 and the nut 2 are installed in sequence. The first limiting member restricts the bolt 1 from rotating in the through hole. At the same time, the unidirectional rotation restriction of the nut 2 and the locking ring 3 by the third limiting member restricts the nut 2 from rotating backward independently of the locking ring 3. Under the action of the second limiting member, the locking ring 3 cooperates with the screw 12 to restrict the rotation of the locking ring 3 relative to the screw 12. Thus, with the cooperation of the nut 2 and the screw 12, the possibility of the nut 2 retracting is eliminated, the nut 2 is self-locking, and the connection stability of the bolt 1 and nut 2 is improved.

[0018] Specifically, the first limiting member can be a pressing part 13, which is located between the head 11 of the bolt 1 and the screw 12. The cross-sectional shape of the pressing part 13 can be polygonal. For example, in this embodiment, the cross-sectional shape of the pressing part 13 is hexagonal. The circumscribed circle of the pressing part 13 should preferably be larger than the size of the through hole on the workpiece. When the nut 2 is screwed onto the bolt 1, as the nut 2 is continuously screwed in, the pressing part 13 is tightened and inserted into the through hole with an interference fit. Through the deformation of the pressing part 13, the deformation of the through hole, or both, the pressing part 13 and the through hole are tightly fitted, restricting the rotation of the bolt 1.

[0019] Furthermore, to avoid shearing between the extrusion part 13 and the edge of the workpiece through hole, which would affect the normal insertion of the extrusion part 13 into the through hole, a tapered or spherical guide part 14 is provided at one end of the extrusion part 13 near the screw 12. In this embodiment, the guide part 14 combines a tapered surface and a spherical surface, so that during the process of pulling the extrusion part 13 into the through hole, the guide part 14 smoothly transitions with the edge of the through hole, ensuring that the extrusion part 13 can be inserted into the through hole in a centered position.

[0020] In this embodiment, the second limiting member includes a guide block 31. A guide groove 15 is formed on the screw 12 along its length. The guide block 31 is fixed to the inner wall of the locking ring 3, and the guide block 31 and the guide groove 15 slide in a linear manner. After the locking ring 3 is fitted onto the screw 12, the rotation of the locking ring 3 is restricted by the interaction between the guide block 31 and the guide groove 15. In this embodiment, three guide grooves 15 are evenly spaced along the circumference of the screw 12, and three guide blocks 31 are provided on the locking ring 3. The interaction between the three guide blocks 31 and the guide grooves 15 enhances the rotational restriction effect of the second limiting member on the locking ring 3.

[0021] In this embodiment, the third limiting member includes a ratchet ring 21 and a ratchet portion 32. The ratchet ring 21 is coaxially fixed to the side of the nut 2 near the locking ring 3. Multiple ratchet teeth are arranged on the ratchet ring 21 along its self-locking circumference. The ratchet portion 32 is fixedly disposed on the side of the locking ring 3 near the nut 2. The ratchet portion 32, in conjunction with the ratchet ring 21, restricts the nut 2 from rotating relative to the locking ring 3 along the direction of the screw 12. When the nut 2 is screwed in and tightened, the ratchet portion 32 and the ratchet ring 21 engage through a beveled surface, forcibly compressing and deforming the nut 2, allowing it to continue rotating until both are completely locked. The back of the ratchet portion 32 and the ratchet ring 21 engage with a planar surface or even with acute angles, effectively restricting the nut 2 from retracting relative to the locking ring 3. Simultaneously, the angle corresponding to each ratchet tooth on the ratchet ring 21 is relatively small, enabling a wider range of self-locking and anti-retraction adjustment for the nut 2, accommodating parts of greater thickness.

[0022] Furthermore, in order to ensure smooth engagement between the ratchet ring 21 on the nut 2 and the ratchet portion 32 on the locking ring 3, and to better maintain the tooth shape of the ratchet ring 21 and the ratchet portion 32, in this embodiment, the locking ring 3 is provided with a telescopic notch 33, and the ratchet portion 32 on the locking ring 3 is located at one end of the telescopic notch 33. The ratchet portion 32 on the locking ring 3 elastically tilts towards the side where the ratchet portion 32 is located, from the adjacent guide block 31. Through the telescopic notch 33 and the elastically tilted ratchet portion 32, while the ratchet ring 21 maintains its engagement with the screw 12 to restrict rotation, the ratchet portion 32 has a certain compressible margin, allowing the ratchet portion 32 to pass through the ratchet ring 21 during the tightening of the nut 2. After the ratchet portion 32 passes through the ratchet on the ratchet ring 21, the ratchet portion 32 elastically tilts up to maintain engagement with the ratchet ring 21, improving its effect of restricting the nut 2 from retraction.

[0023] In the embodiments of this application, bolt 1, nut 2 and locking bias can all be made of nickel-based high-temperature alloy, so that bolt 1 can be used in high-temperature environments and maintain a stable and reliable connection and fixing effect.

[0024] Those skilled in the art will understand that although preferred embodiments of the present invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and modifications.

Claims

1. A high-temperature alloy self-locking nut, comprising a bolt (1) and a nut (2) threaded onto the bolt (1), wherein the bolt (1) comprises a head (11) and a threaded rod (12), and the bolt (1) is threadedly connected to the nut (2) after passing through a through hole in a workpiece, characterized in that: It also includes a locking ring (3), which is sleeved on the screw (12) and located on the side of the nut (2) near the head of the bolt (1). The bolt (1) is provided with a first limiting member for limiting and fixing with the workpiece. A second limiting member is provided between the locking ring (3) and the screw (12) for cooperating to limit the rotation of the locking ring (3). A third limiting member is provided between the locking ring (3) and the nut (2) for limiting the rotation of the nut (2) relative to the locking ring (3) in the direction of loosening the nut (2).

2. The high-temperature alloy self-locking nut according to claim 1, characterized in that, The first limiting member includes a pressing part (13), the cross-section of the pressing part (13) is polygonal, the outer circle size of the pressing part (13) is larger than the size of the through hole on the workpiece, the pressing part (13) is located between the head (11) and the screw (12), and the bolt (1) is interference-fitted in the through hole through the pressing part (13).

3. The high-temperature alloy self-locking nut according to claim 2, characterized in that, The extrusion section (13) has a conical / spherical guide section (14) at one end near the screw (12).

4. A high-temperature alloy self-locking nut according to claim 1, characterized in that, The second limiting member includes a guide block (31), and a guide groove (15) is provided on the screw (12) along its own length direction. The guide block (31) is fixedly installed on the inner wall of the locking ring (3), and the guide block (31) and the guide groove (15) slide in a straight line.

5. A high-temperature alloy self-locking nut according to claim 4, characterized in that, The third limiting component includes a ratchet ring (21) and a ratchet portion (32). The ratchet ring (21) is coaxially fixed on the side of the nut (2) near the locking ring (3). Multiple ratchet teeth are provided on the ratchet ring (21) along the self-locking circumference. The ratchet portion (32) is fixedly provided on the side of the locking ring (3) near the nut (2). The ratchet portion (32) cooperates with the ratchet ring (21) to restrict the nut (2) from rotating relative to the locking ring (3) in the direction of the screw (12).

6. A high-temperature alloy self-locking nut according to claim 5, characterized in that, The locking ring (3) has a telescopic notch (33), and the ratchet part (32) on the locking ring (3) is located at one end of the telescopic notch (33). The ratchet part (32) on the locking ring (3) and the adjacent guide block (31) elastically tilt towards the side where the ratchet part (32) is located.

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