Self-reinforcing non-loosening nut

Abstract

The utility model relates to anti -loosening nut technical field discloses self -reinforcing anti -loosening nut from, including nut, the nut inside sliding connection has the bolt, the nut bottom fixedly connected with the bearing ring, the bearing ring inside is provided with a plurality of locking assembly, the locking assembly includes locking post, connecting piece, reset spring, the connecting piece inside fixedly connected in the locking post outer wall, the reset spring cover sets in the locking post outer wall, reset spring one end fixedly connected in the bearing ring is inside, reset spring other end fixedly connected in the connecting piece side wall. In the utility model, after ensuring the stable connection of nut screwing on the bolt, the multiple bolts of bearing ring outer wall in the nut bottom are removed, reset spring rebound promotes connecting piece displacement, connecting piece drives locking post one end to insert the locking hole in the bolt, so as to reach the effect that the nut is prevented from loosening, solve the problem that traditional nut is easy to loosen, improve the stability and reliability of connecting structure.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening nuts, and in particular to self-reinforcing anti-loosening nuts. Background Technology

[0002] In the field of mechanical connections, nuts, as important fastening components, are widely used in various equipment and engineering structures. The development of self-reinforcing anti-loosening nuts aims to address the risk of nut loosening under complex working conditions and ensure the long-term stability and reliability of the connection. Their performance directly affects the operational safety and service life of equipment, and has always been a key technology area for continuous exploration and improvement in the field of mechanical engineering.

[0003] Currently, there are several common anti-loosening nut technologies. For example, spring washers are used, which rely on the elastic deformation of the washer under pressure to generate axial tension, increasing the friction between the threads to prevent loosening; there is also a double nut structure, where two nuts are tightened together, putting tension on the bolt shank between them, thus maintaining a certain pressure between the threads to achieve the purpose of preventing loosening; in addition, nylon ring lock nuts use nylon rings embedded in the nut to tighten the bolt and prevent the nut from loosening.

[0004] However, these traditional anti-loosening technologies have significant drawbacks. Taking spring washers as an example, under prolonged vibration, high temperatures, or severe impacts, the elasticity of the washer gradually diminishes, making it difficult to continuously provide sufficient friction, leading to nut loosening. Similarly, the nylon ring of a nylon lock nut is prone to aging and deformation under high temperatures, significantly reducing its anti-loosening effect. These problems make it difficult to guarantee the stability and reliability of the connection structure, necessitating more effective anti-loosening technologies. Therefore, a self-reinforcing anti-loosening nut is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a self-reinforcing anti-loosening nut, which aims to improve the problem of easy loosening of nuts in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The self-reinforcing anti-loosening nut includes a nut, a bolt slidably connected inside the nut, a bearing ring fixedly connected to the bottom of the nut, and multiple locking components arranged inside the bearing ring in a circumferential manner. The locking components are used to prevent the nut from loosening.

[0008] The locking assembly includes a locking post, a connecting piece, and a return spring. The bearing ring is an annular structure with an internal cavity for accommodating the locking post, the connecting piece, and the return spring. The connecting piece is fixedly connected to the outer wall of the locking post, and the return spring is sleeved on the outer wall of the locking post. One end of the return spring is fixedly connected to the inside of the bearing ring, and the other end of the return spring is fixedly connected to the side wall of the connecting piece.

[0009] As a further description of the above technical solution:

[0010] The locking post has a cylindrical structure and is used to lock the relative position of the nut and the bolt.

[0011] As a further description of the above technical solution:

[0012] The connecting piece has a plate-like structure, and the connecting piece can move the locking pin within the bearing ring cavity as the reset spring extends and retracts.

[0013] As a further description of the above technical solution:

[0014] The bolt has multiple locking holes on its outer wall, which are arranged in a circumferential array. One end of the locking pin is slidably connected to the inner wall of the locking hole. The locking hole is used to accommodate the insertion of the locking pin to prevent loosening at different tightening depths.

[0015] As a further description of the above technical solution:

[0016] The diameter of the locking hole is the same as the cross-sectional diameter of the locking post, and the locking hole is used to fix the position of the nut in conjunction with the locking post.

[0017] As a further description of the above technical solution:

[0018] The other end of the locking post is internally slidably connected to a pin. The pin is a rod-shaped structure that can be inserted into a corresponding hole inside the locking post to limit the rebound of the reset spring. When removed, it releases and pushes the locking post and connecting piece to move.

[0019] As a further description of the above technical solution:

[0020] A washer is slidably connected to the outer wall of the bolt. The washer is used to be placed between the nut and the connected part, so that when the nut is tightened, the pressure applied by the nut is distributed to a larger area by contacting the connected part through the washer.

[0021] This utility model has the following beneficial effects:

[0022] In this invention, after tightening the nut onto the bolt to ensure a stable connection, multiple pins on the outer wall of the bearing ring at the bottom of the nut are removed. At this time, the return spring rebounds and pushes the connecting piece to move. The connecting piece drives one end of the locking pin to insert into the locking hole inside the bolt, thereby achieving the effect of preventing the nut from loosening. This solves the problem of traditional nuts being easy to loosen and improves the stability and reliability of the connection structure. Attached Figure Description

[0023] Figure 1 This is a perspective view of the self-reinforcing anti-loosening nut proposed in this utility model;

[0024] Figure 2 This is a side view of the locking post structure of the self-reinforcing anti-loosening nut proposed in this utility model;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a side view of the reset spring structure of the self-reinforcing anti-loosening nut proposed in this utility model.

[0027] Legend:

[0028] 1. Nut; 2. Bolt; 3. Washer; 4. Locking hole; 5. Bearing ring; 6. Locking post; 7. Connecting piece; 8. Return spring; 9. Pin. Detailed Implementation

[0029] 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.

[0030] Reference Figures 1-4 The present invention provides an embodiment of a self-reinforcing anti-loosening nut, comprising a nut 1, which is a basic connecting component. The nut 1 is manufactured from 45# steel by cold heading process and its surface is blackened to enhance rust resistance. It has internal threads that conform to standard thread specifications, which are used to engage with bolt 2 to achieve a tight connection. The nut 1 and bolt 2 are both existing technologies and will not be described in detail here. The bottom of the nut 1 is fixedly connected to a bearing ring 5 by welding. The bearing ring 5 is made of 304 stainless steel by turning and has a ring structure. It has multiple cavities inside to accommodate locking components and provide structural support for the anti-loosening function.

[0031] The locking assembly, as the core unit preventing the nut 1 from loosening, consists of a locking post 6, a connecting piece 7, and a return spring 8. The locking post 6 is made of GCr15 bearing steel and has a cylindrical structure with a diameter matching the locking hole 4 on the bolt 2. It is inserted into the locking hole 4 to lock the relative position of the nut 1 and the bolt 2, preventing the nut 1 from rotating and loosening on the bolt 2. The connecting piece 7 is made of 304 stainless steel and has a plate-like structure. Its internal structure is fixedly connected to the outer wall of the locking post 6 by welding. It is used to move the locking post 6 under the action of the return spring 8. The size of the connecting piece 7 is adapted to the internal cavity of the bearing ring 5, allowing it to slide radially within the cavity. The return spring 8 is made of 65Mn spring steel and is sleeved on the outer wall of the locking post 6. One end is fixed to a pre-set spring seat inside the bearing ring 5 by welding, and the other end is welded to the side wall of the connecting piece 7. The bolt 2, which is used to provide the reset spring force for the locking post 6 to be inserted into the locking hole 4, is a connecting part that mates with the nut 1. It is made of 40Cr alloy steel and the surface is galvanized. Multiple locking holes 4 are drilled on its outer wall. The locking holes 4 are distributed in a circumferential array. The diameter of the holes matches the cross-sectional diameter of the locking post 6. This is to accommodate the nut 1 at different tightening depths so that the locking post 6 can be inserted to achieve the anti-loosening function. A washer 3 is also slidably connected to the outer wall of the bolt 2. The washer 3 is stamped from Q235B steel and coated with an anti-rust coating. It is used to be placed between the nut 1 and the connected part. When the nut 1 is tightened, the washer 3 increases the contact area and evenly distributes the pressure applied by the nut 1 to the surface of the connected part to avoid local stress concentration.

[0032] Specifically, when using this self-reinforcing anti-loosening nut, the worker first inserts the bolt 2 into the pre-machined corresponding hole in the connected part, ensuring that the bolt 2 penetrates the connected part perpendicularly. Then, using a wrench or power tool, the nut 1 is rotated clockwise along the thread direction of the bolt 2. As the nut 1 is screwed in, the distance between the nut 1 and the connected part gradually decreases, and the axial force of the thread tightly presses the connected part until the predetermined tightening torque is reached, ensuring the stable connection of the connected parts. After the nut 1 is tightened in place, the worker uses a tool to remove multiple pins 9 from the outer wall of the bottom bearing ring 5 of the nut 1 in sequence. When the pins 9 are inserted, they restrict the movement of the locking pin 6. After removal, the return spring 8, which was originally in a compressed state, loses its constraint and begins to release its elastic potential energy. Under the action of the elastic force, The return spring 8 pushes the connecting piece 7 to move along the inner cavity of the bearing ring 5. The displacement of the connecting piece 7, through its fixed connection with the locking post 6, drives the locking post 6 to move outward radially in sync. During the movement, one end of the locking post 6 gradually approaches the locking hole 4 on the outer wall of the bolt 2. As the connecting piece 7 is continuously pushed by the return spring 8, one end of the locking post 6 is accurately inserted into the corresponding locking hole 4 inside the bolt 2. Since the diameter of the locking post 6 is consistent with the diameter of the locking hole 4, an interference fit is formed, which constrains the nut 1 in both the axial and circumferential directions, preventing it from loosening or rotating relative to the bolt 2. Through the cooperation between the locking post 6 and the locking hole 4, and the elastic reset effect of the return spring 8, the self-reinforcing and anti-loosening function of the nut is realized, effectively improving the reliability of the connection structure under vibration, impact and other working conditions.

[0033] Working principle: When using this self-reinforcing anti-loosening nut, after inserting the bolt 2 into the corresponding hole of the connected part, the worker uses a tool to tighten the nut 1 onto the bolt 2. After ensuring that the connected parts are stably connected, the worker removes the multiple pins 9 from the outer wall of the bearing ring 5 at the bottom of the nut 1. At this time, the return spring 8 resumes its rebound, pushing the connecting piece 7 to move. The displacement of the connecting piece 7 then drives one end of the locking pin 6 to insert into the locking hole 4 inside the bolt 2, thereby achieving the effect of preventing the nut from loosening.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-reinforcing anti-loosening nut, comprising a nut (1), characterized in that: The nut (1) is slidably connected to a bolt (2), and a bearing ring (5) is fixedly connected to the bottom of the nut (1). The bearing ring (5) is provided with multiple locking components, which are distributed in a circumferential shape. The locking components are used to prevent the nut (1) from loosening. The locking assembly includes a locking post (6), a connecting piece (7), and a return spring (8). The bearing ring (5) is an annular structure with an internal cavity for accommodating the locking post (6), the connecting piece (7), and the return spring (8). The connecting piece (7) is internally fixedly connected to the outer wall of the locking post (6). The return spring (8) is sleeved on the outer wall of the locking post (6). One end of the return spring (8) is fixedly connected to the inside of the bearing ring (5), and the other end of the return spring (8) is fixedly connected to the side wall of the connecting piece (7).

2. The self-reinforcing anti-loosening nut according to claim 1, characterized in that: The locking post (6) is a cylindrical structure and is used to lock the relative position of the nut (1) and the bolt (2).

3. The self-reinforcing anti-loosening nut according to claim 1, characterized in that: The connecting piece (7) has a plate-like structure. The connecting piece (7) can move the locking pin (6) by extending and retracting the reset spring (8) within the cavity of the bearing ring (5).

4. The self-anchoring non-backout cap of claim 1, wherein: The bolt (2) has multiple locking holes (4) on its outer wall. The locking holes (4) are arranged in a circular array. One end of the locking pin (6) is slidably connected to the inner wall of the locking hole (4). The locking hole (4) is used to accommodate the insertion of the locking pin (6) to prevent loosening under different tightening depths.

5. The self-reinforcing anti-loosening nut according to claim 4, characterized in that: The diameter of the locking hole (4) is the same as the diameter of the locking post (6). The locking hole (4) is used to fix the position of the nut (1) in conjunction with the locking post (6).

6. The self-reinforcing anti-loosening nut according to claim 1, characterized in that: The other end of the locking post (6) is slidably connected to a pin (9). The pin (9) is a rod-shaped structure that can be inserted into the corresponding insertion hole inside the locking post (6) to limit the rebound of the reset spring (8). After being pulled out, it releases and pushes the locking post (6) and the connecting piece (7) to move.

7. The self-reinforcing anti-loosening nut according to claim 1, characterized in that: A washer (3) is slidably connected to the outer wall of the bolt (2). The washer (3) is used to be placed between the nut (1) and the connected part. When the nut (1) is tightened, the washer (3) contacts the connected part and disperses the pressure applied by the nut (1) to a larger area.

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