Anti-theft nut with anti-loose ring

Abstract

The utility model discloses a theftproof nut with anti-loose ring relates to fastener technical field. The utility model discloses a nut body, the inside of nut body is provided with the thread, the bottom of thread is provided with anti-loose subassembly, and the surface of nut body is provided with theftproof subassembly. The utility model discloses a theftproof nut through the mounting groove for elastic ring has provided accurate installation positioning and stable fixed space, can effectively avoid the elastic ring in the nut assembly, the use process appears the problem such as displacement, falling, ensures that elastic ring is always in the key anti-loose position of thread bottom, when the nut and bolt cooperate and tighten, and elastic ring will be extruded by bolt and nut and produce elastic deformation, and then form the sustained elastic reaction force, and the force can make the thread surface of nut and bolt closely adhere, and fill the thread cooperation gap, even under the complex working conditions such as equipment vibration, impact.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and in particular relates to an anti-theft nut with an anti-loosening ring. Background Technology

[0002] Nuts, as commonly used fasteners, are widely used in various fields such as machinery, construction, and transportation. In actual use, due to the influence of external factors such as vibration and impact, nuts are prone to loosening, which not only affects the normal operation of equipment, but may also cause safety accidents in severe cases. At the same time, in some outdoor equipment and public facilities, nuts are also at risk of being stolen, which brings great trouble to equipment maintenance and public safety.

[0003] Chinese patent application CN202165377U discloses an anti-theft nut, characterized by an anti-theft head at one end and a locking end at the other. A connecting portion is provided between the anti-theft head and the locking end, with a cross-section smaller than that of the anti-theft head and the locking end, so that the torsional resistance of the anti-theft head and the locking end is greater than that of the connecting portion. When the anti-theft nut is tightened, the connecting portion breaks off before the anti-theft head and the locking end. In this invention, the anti-theft head and the locking end are connected as one unit by a groove. Compared with the prior art, the advantages of this invention are: reasonable design, simple structure, and the fact that the connecting portion breaks off before the anti-theft head and the locking end when the anti-theft nut is tightened, making it impossible to unscrew the anti-theft head through the locking end.

[0004] While this patent addresses the issue of easily stolen equipment or devices due to the ease of disassembly of ordinary nuts by incorporating a connecting portion with a smaller cross-section between the anti-theft head and the locking end, allowing the connecting portion to break off before the anti-theft head and locking end during tightening, thus cutting off the path to disassembling the anti-theft head through the locking end, the lack of a dedicated anti-loosening component in this anti-theft nut means that in real-world applications, nuts are often subjected to complex conditions such as vibration and impact. The absence of an anti-loosening structure will cause the nut to gradually loosen over time, initially compromising the connection stability of the equipment and potentially leading to further problems. Misalignment of components and abnormal operating noises can affect the normal operation of equipment. As the loosening worsens, it may even lead to the failure of the overall connection structure, causing equipment malfunctions and, in severe cases, even safety accidents, posing a direct threat to personnel and property safety. At the same time, the anti-theft structures in the existing technology are difficult to manufacture: most anti-theft structures require the design of special connection forms. The processing process not only requires customized special molds and equipment, but also places extremely high demands on processing precision. Even a slight deviation will lead to product scrap, which not only increases the scrap rate in the production process, but also significantly extends the production cycle, resulting in the overall production efficiency remaining at a low level.

[0005] To address this issue, we provide an anti-theft nut with an anti-loosening ring to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide an anti-theft nut with an anti-loosening ring. By combining the anti-loosening component and the anti-theft component, the problem of the lack of an anti-loosening structure and the difficulty in manufacturing the anti-theft structure in the existing anti-theft nut is solved.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to an anti-theft nut with an anti-loosening ring, comprising a nut body with a thread on its inner side. An anti-loosening component is provided at the bottom of the thread, and an anti-theft component is provided on the surface of the nut body. The anti-loosening component includes a mounting groove located at the bottom of the inner side of the nut body. An elastic ring is fixedly connected to the inner cavity of the mounting groove and is located at the bottom of the thread. The anti-theft component includes a first anti-theft ring, the inner side of which is fixedly connected to the nut body. A second anti-theft ring is provided at the top of the first anti-theft ring and is fixedly connected to the inner side of the second anti-theft ring. The distance between the first and second anti-theft rings can be adjusted before production according to requirements. By setting a specific distance, general disassembly tools cannot be inserted into the gap between the rings due to thickness mismatch, allowing only special tools of the corresponding thickness to contact the nut body and exert force. This cuts off the possibility of illegal disassembly from the tool compatibility level. The elastic ring has a rectangular cross-section, which allows for a larger contact area between the elastic ring and the mounting groove, making it less prone to local suspension or displacement after assembly and ensuring stable maintenance at a preset position at the bottom of the thread.

[0009] The present invention is further configured such that the inner diameter of the elastic ring is smaller than the inner diameter of the thread, so that when the elastic ring is engaged with the bolt, it will naturally form a radial contraction force to tightly wrap the outer surface of the bolt.

[0010] The present invention is further configured such that the elastic ring includes an adhesive layer, the adhesive layer is fixedly connected to the nut body, and an elastic layer is fixedly connected to the inner side of the adhesive layer. The adhesive layer can be made of a material with good compatibility with the nut body material and high connection strength to ensure the reliability of the fixation; the elastic layer can be made of a special elastic material with strong elastic recovery and excellent wear resistance to maximize the anti-loosening function.

[0011] The present invention is further configured such that a protrusion is fixedly connected to the inner side of the elastic layer. When the bolt is screwed into the nut body and comes into contact with the elastic layer, the protrusion can conform to the outer surface of the bolt through the deformation of the elastic layer, forming a double contact structure of surface plus point.

[0012] The present invention is further configured such that the number of protrusions is multiple and they are arrayed on the inner side of the elastic layer. The multiple protrusions are arrayed to form a uniform contact point matrix on the inner side of the elastic ring elastic layer, so as to achieve multi-point synchronous contact with the bolt surface.

[0013] The present invention is further configured such that a fixing groove is provided on the top of the nut body, and a sealing gasket is fixedly connected to the inner cavity of the fixing groove. The sealing gasket in the inner cavity of the fixing groove can tightly fit the top of the nut and the surface of the connected part to form an annular sealing barrier.

[0014] The present invention is further configured such that the inner diameter of the top of the sealing gasket is larger than the inner diameter of the fixing groove, so that its top can naturally extend outward to the outside of the fixing groove and cover the contact edge between the top of the nut body and the connected part.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model of anti-theft nut provides precise installation positioning and a stable fixing space for the elastic ring through the installation groove, which can effectively prevent the elastic ring from shifting or falling off during nut assembly and use. It ensures that the elastic ring is always in the key anti-loosening position at the bottom of the thread. When the nut and bolt are tightened together, the elastic ring will be squeezed by the bolt and nut to produce elastic deformation, thereby forming a continuous elastic reaction force. This force can make the thread surfaces of the nut and bolt fit tightly and fill the thread fit gap. Even under complex working conditions such as equipment vibration and impact, it can effectively counteract the loosening tendency of the nut caused by external force, fundamentally reducing the risk of nut loosening.

[0017] 2. The anti-theft component of this utility model has a double physical protection structure formed by arranging the first and second anti-theft rings along the axial direction of the nut body. When an outsider attempts to disassemble the nut with ordinary tools, the two layers of anti-theft rings can prevent the tool from effectively engaging with the nut body. This not only prevents the tool from directly applying torsional force to the nut body, but also disrupts the force path of conventional disassembly through the blocking and limiting of the two rings, greatly increasing the difficulty of illegal disassembly. Compared with a single anti-theft structure, its anti-theft effect is more comprehensive and less likely to be breached. Moreover, the structure is simple and the production efficiency is high. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional diagram of an anti-theft nut with a locking ring.

[0020] Figure 2 This is a perspective view of the anti-loosening component in an anti-theft nut with an anti-loosening ring.

[0021] Figure 3 This is an enlarged view of point A in a type of anti-theft nut with a locking ring.

[0022] Figure 4 This is an enlarged view of point B in a type of anti-theft nut with a locking ring.

[0023] Figure 5 This is a schematic diagram showing the connection between the bonding layer and the elastic layer in an anti-theft nut with an anti-loosening ring.

[0024] In the attached diagram: 1. Nut body; 2. Thread; 3. Anti-loosening component; 301. Mounting groove; 302. Elastic ring; 4. Anti-theft component; 401. First anti-theft ring; 402. Second anti-theft ring; 5. Adhesive layer; 6. Elastic layer; 7. Protrusion; 8. Fixing groove; 9. Sealing gasket. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figure 1-5 This utility model is an anti-theft nut with an anti-loosening ring, including a nut body 1, a thread 2 on the inner side of the nut body 1, an anti-loosening component 3 at the bottom of the thread 2, and an anti-theft component 4 on the surface of the nut body 1. The anti-loosening component 3 includes a mounting groove 301 located at the bottom of the inner side of the nut body 1, and an elastic ring 302 fixedly connected to the inner cavity of the mounting groove 301 located at the bottom of the thread 2. The anti-theft component 4 includes a first anti-theft ring 401 fixedly connected to the inner side of the nut body 1, and a second anti-theft ring 402 fixedly connected to the top of the first anti-theft ring 401.

[0027] Specifically: The first anti-theft ring 401 and the second anti-theft ring 402 can be adjusted in terms of the distance between them before production. By setting a specific distance, general disassembly tools cannot be inserted into the gap between the rings due to thickness mismatch. Only special tools of the corresponding thickness are allowed to contact the nut body 1 to exert force, thus cutting off the possibility of illegal disassembly from the tool adaptation level. The elastic ring 302 has a rectangular cross-section, which allows the elastic ring 302 to have a larger contact area with the mounting groove 301. After assembly, it is not easy for local suspension or displacement to occur, and it can be stably maintained in the preset position at the bottom of the thread 2.

[0028] Please see Figure 1-5The inner diameter of the elastic ring 302 is smaller than the inner diameter of the thread 2. The elastic ring 302 includes a bonding layer 5, which is fixedly connected to the nut body 1. An elastic layer 6 is fixedly connected to the inner side of the bonding layer 5. A protrusion 7 is fixedly connected to the inner side of the elastic layer 6. There are multiple protrusions 7, which are arranged in an array on the inner side of the elastic layer 6. A fixing groove 8 is opened on the top of the nut body 1. A sealing gasket 9 is fixedly connected to the inner cavity of the fixing groove 8. The inner diameter of the top of the sealing gasket 9 is larger than the inner diameter of the fixing groove 8.

[0029] Specifically: The inner diameter of the elastic ring 302 is smaller than the inner diameter of the thread 2, so that when the elastic ring 302 is engaged with the bolt, it will naturally form a radial contraction fitting force, tightly wrapping the outer surface of the bolt. The bonding layer 5 can be made of a material with good compatibility with the nut body 1 and high connection strength to ensure the reliability of the fixation. The elastic layer 6 can be made of a special elastic material with strong elastic recovery and excellent wear resistance to maximize the anti-loosening function. When the bolt is screwed into the nut body 1 and comes into contact with the elastic layer 6, the protrusion 7 can fit the outer surface of the bolt through the deformation of the elastic layer 6, forming a double contact structure of surface plus points. Multiple protrusions 7 are distributed in an array, which can form a uniform contact point matrix inside the elastic layer 6 of the elastic ring 302, and achieve multi-point synchronous contact with the bolt surface. The sealing gasket 9 in the inner cavity of the fixing groove 8 can fit tightly against the top of the nut and the surface of the connected part, forming an annular sealing barrier. The inner diameter of the top of the sealing gasket 9 is larger than the inner diameter of the fixing groove 8, so that its top can naturally extend outward to the outside of the fixing groove 8, covering the contact edge between the top of the nut body 1 and the connected part.

[0030] The working principle of this utility model is as follows: When the nut body 1 is connected to the bolt through the thread 2, the bolt will forcefully squeeze through the elastic ring 302 through the protrusions on its surface, causing it to expand radially. Due to the design of the inner diameter and material elasticity of the elastic ring 302, after squeezing through, it will generate a continuous rebound contraction force pointing towards the bolt axis, tightly pressing against the uneven cylindrical surface formed by the tooth crest and tooth valley of the bolt. The setting of the first anti-theft ring 401 and the second anti-theft ring 402 means that it can only be used with tools that match the distance between them. For the existing adjustable wrench, it can only be adjusted according to the size of the bolt and cannot adjust the overall thickness, which makes it impossible to insert it between the first anti-theft ring 401 and the second anti-theft ring 402 to achieve anti-theft. Moreover, this anti-theft structure is simple and easy to produce.

[0031] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A theft-proof nut with a lock washer, comprising a nut body (1), characterized in that: The nut body (1) has a thread (2) on its inner side, and an anti-loosening component (3) is provided at the bottom of the thread (2). The nut body (1) has an anti-theft component (4) on its surface. The anti-loosening component (3) includes a mounting groove (301), which is located at the bottom of the inner side of the nut body (1). An elastic ring (302) is fixedly connected to the inner cavity of the mounting groove (301), and the elastic ring (302) is located at the bottom of the thread (2). The anti-theft component (4) includes a first anti-theft ring (401), the inner side of which is fixedly connected to the nut body (1), and a second anti-theft ring (402) is provided on the top of the first anti-theft ring (401), the inner side of which is fixedly connected to the nut body (1).

2. The anti-theft nut with a lock washer according to claim 1, characterized in that: The inner diameter of the elastic ring (302) is smaller than the inner diameter of the thread (2).

3. The anti-theft nut with an anti-loosening ring according to claim 1, characterized in that: The elastic ring (302) includes an adhesive layer (5), which is fixedly connected to the nut body (1), and an elastic layer (6) is fixedly connected to the inner side of the adhesive layer (5).

4. The anti-theft nut with a lock washer according to claim 3, characterized in that: The inner side of the elastic layer (6) is fixedly connected with a protrusion (7).

5. The anti-theft nut with a lock washer according to claim 4, characterized in that: The number of bumps (7) is multiple, and they are arrayed inside the elastic layer (6).

6. The anti-theft nut with an anti-loosening ring according to claim 1, characterized in that: The nut body (1) has a fixing groove (8) on its top, and a sealing gasket (9) is fixedly connected to the inner cavity of the fixing groove (8).

7. The anti-theft nut with a lock washer according to claim 6, characterized in that: The inner diameter of the top of the sealing gasket (9) is larger than the inner diameter of the fixing groove (8).

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