High-strength anti-loosening bolt

Abstract

The utility model provides a high -strength anti -loosening bolt belongs to mechanical connection technical field, including the screw rod with the sandwich tungsten steel structure, the one end fixed connection of screw rod has the head of integral type structure, the one end fixed connection of head has the outer edge ring, the surface fixed connection of outer edge ring and fixed object contact has first anti -loosening part, the outside screw thread connection of screw rod has first nut and second nut, the one end fixed connection of first nut has second anti -loosening part, after the screwing of first nut and second nut, the third anti -loosening part is formed between both, the screw rod of the utility model adopts the sandwich tungsten steel structure to guarantee high strength, the first anti -loosening part of head outer edge ring, utilize the wear -resisting rubber ring of gap, different height and being equipped with the anti -slip texture, increase and fixed object friction force, buffer vibration simultaneously, the second anti -loosening part of first nut, through the wear -resisting rubber ring of round sleeve inner ring inlay and is closely contacted with the screw, increases the resistance between threads.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical connection technology, specifically relating to a high-strength anti-loosening bolt. Background Technology

[0002] In the field of mechanical connections, bolts, as basic fasteners, are widely used in the assembly of various equipment and structures. However, traditional bolts are prone to loosening under complex working conditions such as vibration and impact, leading to equipment failure and safety hazards, especially in high-strength connection scenarios where the requirements for bolt strength and anti-loosening performance are even higher. In existing technologies, ordinary bolts mostly rely on a single anti-loosening structure, such as washers and lock nuts, which have limited anti-loosening effects. Moreover, high-strength bolts often suffer from thread wear and connection failure due to insufficient structural design under long-term stress or harsh environments, making it difficult to meet the stringent requirements for connection reliability. Therefore, developing bolts that combine high strength and multiple anti-loosening functions has become a key requirement for improving the stability of mechanical connections. Utility Model Content

[0003] The purpose of this invention is to provide a high-strength anti-loosening bolt, which aims to solve the above-mentioned technical problems.

[0004] This utility model embodiment provides a high-strength anti-loosening bolt, including a screw rod with a sandwich tungsten steel structure, one end of the screw rod is fixedly connected to an integral head, one end of the head is fixedly connected to an outer ring, and the surface of the outer ring that contacts the fixed object is fixedly connected to a first anti-loosening part; The screw is externally threaded with a first nut and a second nut. One end of the first nut is fixedly connected with a second anti-loosening part. After the first nut and the second nut are tightened, a third anti-loosening part is formed between them.

[0005] In one embodiment of this utility model, the first anti-loosening part includes a first wear-resistant rubber ring fixedly connected to the surface of the outer edge ring. A second wear-resistant rubber ring and a third wear-resistant rubber ring are respectively provided on both sides of the first wear-resistant rubber ring. A gap is reserved between the first wear-resistant rubber ring and the second and third wear-resistant rubber rings, and the height of the first wear-resistant rubber ring is greater than the height of the second and third wear-resistant rubber rings.

[0006] In one embodiment of this utility model, the surfaces of the first wear-resistant rubber ring, the second wear-resistant rubber ring, and the third wear-resistant rubber ring are all provided with anti-slip textures.

[0007] In one embodiment of this utility model, the second anti-loosening part includes a first circular sleeve fixedly connected to one end of the first nut. The first circular sleeve has a ring-shaped groove inside, and a fourth wear-resistant rubber ring is fixedly embedded inside the ring-shaped groove. The inner ring of the fourth wear-resistant rubber ring is tightly abutted against the thread of the screw.

[0008] In one embodiment of this utility model, the third anti-loosening part includes a second circular sleeve fixedly connected to the other end of the first nut. The outer wall of the second circular sleeve is provided with an external thread of the same specification as the screw thread. One end of the second nut is provided with an annular groove adapted to the size of the second circular sleeve. One side wall of the annular groove is provided with an internal thread adapted to the external thread and capable of stable thread connection.

[0009] In one embodiment of this utility model, an anti-slip washer is fitted onto the outside of the second circular sleeve.

[0010] Compared with the prior art, the beneficial effects of this utility model are: The screw of this utility model adopts a sandwich tungsten steel structure to ensure high strength. The first anti-loosening part of the outer ring of the head uses a wear-resistant rubber ring with gaps, different heights and anti-slip texture to increase the friction with the fixed object and buffer vibration. The second anti-loosening part of the first nut has a wear-resistant rubber ring embedded in the inner ring of the circular sleeve that tightly abuts against the thread, increasing the resistance between the threads. The third anti-loosening part formed after the first nut and the second nut are tightened uses the external thread of the sleeve and the internal thread of the annular groove to construct a double threaded connection structure. With the anti-slip washer, it prevents the bolt from loosening from multiple dimensions, greatly improving the connection stability under high-strength working conditions. Through the multi-anti-loosening structure design, it effectively solves the problem of insufficient anti-loosening performance of traditional bolts and meets the requirements of bolt anti-loosening and high strength in complex environments. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the first anti-loosening part of the present invention; Figure 3 This is a schematic diagram of the second anti-loosening part of this utility model; Figure 4 This is a schematic diagram showing the disassembled second anti-loosening part of this utility model; Figure 5 This is a schematic diagram of the third anti-loosening part of this utility model.

[0012] In the diagram: 100, screw; 110, head; 120, outer ring; 130, first nut; 140, second nut; 200, first anti-loosening part; 210, first wear-resistant rubber ring; 220, second wear-resistant rubber ring; 230, third wear-resistant rubber ring; 300, second anti-loosening part; 310, first circular sleeve; 320, annular groove; 330, fourth wear-resistant rubber ring; 400, third anti-loosening part; 410, second circular sleeve; 420, external thread; 430, annular groove; 440, internal thread; 450, anti-slip washer. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0014] Please see Figure 1-5 A high-strength anti-loosening bolt includes a screw 100 with a sandwich tungsten steel structure, one end of the screw 100 is fixedly connected to a head 110 with an integral structure, one end of the head 110 is fixedly connected to an outer edge ring 120, and a first anti-loosening part 200 is fixedly connected to the surface of the outer edge ring 120 that contacts the fixed object. The screw 100 has a first nut 130 and a second nut 140 connected to its external thread. One end of the first nut 130 is fixedly connected to a second anti-loosening part 300. After the first nut 130 and the second nut 140 are tightened, a third anti-loosening part 400 is formed between them.

[0015] Specifically, in actual installation scenarios, the sandwich tungsten steel structure of the screw 100 provides basic high-strength support and can withstand large loads. During installation, the screw 100 is first passed through the reserved hole of the object to be fixed, so that the outer edge ring 120 of the head 110 fits against the surface of the object. At this time, the first anti-loosening part 200 directly contacts the object to form initial anti-slip. Then, the first nut 130 and the second nut 140 are tightened in sequence. The first nut 130 forms secondary anti-loosening with the screw 100 through the second anti-loosening part 300. When both are fully tightened, the third anti-loosening part 400 makes the first nut 130 and the second nut 140 form a linkage fixing structure. Through the triple cooperation of the "head and double nuts", the overall loosening is effectively prevented under conditions such as vibration and impact.

[0016] In this embodiment: the first anti-loosening part 200 includes a first wear-resistant rubber ring 210 fixedly connected to the surface of the outer edge ring 120. A second wear-resistant rubber ring 220 and a third wear-resistant rubber ring 230 are respectively provided on both sides of the first wear-resistant rubber ring 210. A gap is reserved between the first wear-resistant rubber ring 210 and the second wear-resistant rubber ring 220 and the third wear-resistant rubber ring 230. The height of the first wear-resistant rubber ring 210 is greater than the height of the second wear-resistant rubber ring 220 and the third wear-resistant rubber ring 230.

[0017] Specifically, when the bolt contacts the fixed object, the outer edge ring 120 of the head 110 presses against the object surface. The first wear-resistant rubber ring 210, which is the tallest, contacts the object first and deforms, filling the tiny gaps in the contact surface. As the bolt tightening force increases, the second wear-resistant rubber ring 220 and the third wear-resistant rubber ring 230, which are shorter on both sides, gradually contact the object surface. The reserved gap between the three provides independent deformation space for each rubber ring, avoiding anti-slip failure caused by mutual compression. This allows the elastic recovery force of the multiple rubber rings to maintain friction with the object in a vibrating environment. At the same time, the different height designs can adapt to contact surfaces with different flatness, improving the overall anti-slip stability.

[0018] In this embodiment, the surfaces of the first wear-resistant rubber ring 210, the second wear-resistant rubber ring 220, and the third wear-resistant rubber ring 230 are all provided with anti-slip textures.

[0019] Specifically, the anti-slip textures on the surfaces of the first wear-resistant rubber ring 210, the second wear-resistant rubber ring 220, and the third wear-resistant rubber ring 230 further enhance the anti-loosening effect of the first anti-loosening part 200. During bolt installation, when the rubber ring contacts and is pressed against the surface of the fixed object, the anti-slip texture will embed into the tiny pits on the object's surface or engage with the rough surface. When the equipment vibrates during operation, the texture structure can effectively break the relative sliding tendency of the contact surface, transforming sliding friction into more stable static friction, which can reduce the risk of slippage on the contact surface. Combined with the elasticity of the rubber ring itself, a dual anti-slip mechanism of physical engagement and elastic compression is formed, improving the connection reliability of the bolt in complex environments.

[0020] In this embodiment: the second anti-loosening part 300 includes a first circular sleeve 310 fixedly connected to one end of the first nut 130. The first circular sleeve 310 has a ring groove 320 inside. A fourth wear-resistant rubber ring 330 is fixedly embedded inside the ring groove 320. The inner ring of the fourth wear-resistant rubber ring 330 is tightly abutted against the thread of the screw 100.

[0021] Specifically, when the first nut 130 is tightened, the first circular sleeve 310 at one end moves synchronously with the nut. The fourth wear-resistant rubber ring 330 fixed in the annular groove 320 inside the sleeve gradually comes into contact with the threads of the screw 100. As the tightening force increases, the fourth wear-resistant rubber ring 330 is deformed by the threads, tightly filling the gap between the threads and forming a tight fit with the thread side. This allows the elastic force of the rubber ring to continue acting on the threads when the bolt is affected by vibration, counteracting the tendency of the nut to loosen. At the same time, the friction between the rubber ring and the threads can prevent the nut from rotating, forming an anti-loosening barrier at the threaded connection level, which complements the first anti-loosening part 200.

[0022] In this embodiment: the third anti-loosening part 400 includes a second circular sleeve 410 fixedly connected to the other end of the first nut 130. The outer wall of the second circular sleeve 410 is provided with an external thread 420 with the same thread specification as the screw 100. One end of the second nut 140 is provided with an annular groove 430 adapted to the size of the second circular sleeve 410. One side of the annular groove 430 is provided with an internal thread 440 adapted to the external thread 420 and capable of stable thread connection.

[0023] Specifically, during installation, when the first nut 130 is tightened to the preset position, and the second nut 140 is tightened, the annular groove 430 at one end of the second nut 140 will gradually fit into the second circular sleeve 410 of the first nut 130. At this time, the external thread 420 on the outer wall of the sleeve and the internal thread 440 on the groove wall of the annular groove 430 are precisely engaged, forming a double threaded connection between the screw 100 and the two nuts. At the same time, the two nuts form a mechanical linkage. When one nut tends to loosen, the thread constraint force of the other nut will prevent it from moving. Meanwhile, the nested design increases the torsional stiffness of the overall structure and can disperse stress under high-intensity loads, avoiding the problem of stripping caused by excessive force on a single nut.

[0024] In this embodiment, an anti-slip washer 450 is fitted on the outside of the second circular sleeve 410.

[0025] Specifically, when the second nut 140 and the first nut 130 are tightened together by the threaded connection, the anti-slip washer 450 is squeezed between the contact surfaces of the first nut 130 and the second nut 140. The elastic deformation of the anti-slip washer 450 generates continuous axial pressure, increases the friction between the two nuts, and prevents relative rotation. At the same time, the anti-slip washer 450 can fill the small unevenness of the contact surfaces of the two nuts, making the thread engagement tighter. In a vibrating environment, it can buffer the impact force and reduce fatigue damage to the threaded connection. Combined with the double thread structure, it further enhances the anti-loosening durability of the third anti-loosening part 400.

[0026] 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 high-strength anti-loosening bolt, comprising a screw (100) with a sandwich tungsten carbide structure, characterized in that: One end of the screw (100) is fixedly connected to a head (110) with an integral structure, and one end of the head (110) is fixedly connected to an outer ring (120). The surface of the outer ring (120) that contacts the fixed object is fixedly connected to a first anti-loosening part (200). The screw (100) is externally threaded with a first nut (130) and a second nut (140). One end of the first nut (130) is fixedly connected with a second anti-loosening part (300). After the first nut (130) and the second nut (140) are tightened, a third anti-loosening part (400) is formed between them. The first anti-loosening part (200) includes a first wear-resistant rubber ring (210) fixedly connected to the surface of the outer edge ring (120). A second wear-resistant rubber ring (220) and a third wear-resistant rubber ring (230) are respectively provided on both sides of the first wear-resistant rubber ring (210). A gap is reserved between the first wear-resistant rubber ring (210) and the second wear-resistant rubber ring (220) and the third wear-resistant rubber ring (230). The height of the first wear-resistant rubber ring (210) is greater than the height of the second wear-resistant rubber ring (220) and the third wear-resistant rubber ring (230). The surfaces of the first wear-resistant rubber ring (210), the second wear-resistant rubber ring (220), and the third wear-resistant rubber ring (230) are all provided with anti-slip textures; The second anti-loosening part (300) includes a first circular sleeve (310) fixedly connected to one end of the first nut (130). The first circular sleeve (310) has a ring groove (320) inside. A fourth wear-resistant rubber ring (330) is fixedly embedded inside the ring groove (320). The inner ring of the fourth wear-resistant rubber ring (330) is tightly abutted against the thread of the screw (100). The third anti-loosening part (400) includes a second circular sleeve (410) fixedly connected to the other end of the first nut (130). The outer wall of the second circular sleeve (410) is provided with an external thread (420) with the same thread specification as the screw (100). One end of the second nut (140) is provided with an annular groove (430) adapted to the size of the second circular sleeve (410). One side of the annular groove (430) is provided with an internal thread (440) adapted to the external thread (420) and capable of stable thread connection.

2. The high-strength anti-loosening bolt according to claim 1, characterized in that: The second circular sleeve (410) is fitted with an anti-slip washer (450).

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