Left-hand and right-hand thread bolt

Abstract

The utility model belongs to the technical field of bolts, and particularly relates to a left-right-hand thread bolt. Comprising a bolt head; the left-handed screws are arranged at the upper and lower ends of the bolt head; the left-handed nut is arranged on the left-handed screw in a threaded mode, and a workpiece needing to be fastened is screwed through the left-handed nut; the right-handed screw is arranged at one end, far away from the bolt head, of the left-handed screw; the right-handed nut is arranged on the right-handed screw in a threaded mode, and the right-handed nut abuts against the left-handed nut after being screwed; and an anti-loosening device is arranged on the right-handed screw and prevents the right-handed nut from loosening by adopting an anti-loosening technology. The utility model provides a left-hand and right-hand thread bolt which improves the anti-loosening capability of the left-hand and right-hand thread bolt and ensures that a nut cannot be loosened due to factors such as vibration, temperature change and the like under various extreme working conditions.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bolt technical field, especially relate to a left and right thread bolt. BACKGROUND

[0002] In the field of mechanical connection, as a widely used fastening component, bolts and nuts play a crucial role. Left and right thread bolts have unique advantages in some occasions that require bidirectional force balance or synchronous fastening due to their special thread structure, such as in the key connection parts of large mechanical equipment, the connection of some components in the automobile chassis suspension system, etc.

[0003] Although the design of left and right thread should theoretically prevent the loosening of nuts, due to factors such as material fatigue, temperature changes, and vibration, such bolts may still experience nut loosening during long-term use. Specifically, the nut gradually loosens during long-term use, especially under high load or frequent vibration conditions, affecting the stability of the bolt connection and thus the safety and reliability of the overall structure. The existing left and right thread bolts lack effective anti-loosening mechanisms in design and cannot reliably constrain the nut. Once the nut starts to loosen, the pre-tightening force between the nut and the bolt will quickly decay, causing the connection part to gradually lose its intended fastening effect.

[0004] This not only leads to the destruction of the overall equipment, displacement deviation between components, and affects the precision and normal operation of the equipment, and in some extreme cases, complete loosening of the nut may also cause serious safety accidents, posing a great threat to personnel life and property. INVENTION CONTENTS

[0005] The utility model aims at the above-mentioned technical problems, and provides a left and right thread bolt that improves the anti-loosening ability of the bolt and ensures that the nut will not loosen due to factors such as vibration and temperature changes under various extreme working conditions.

[0006] Therefore, the utility model provides a left and right thread bolt, which comprises:

[0007] a bolt head;

[0008] a left-handed screw rod arranged at the upper and lower ends of the bolt head;

[0009] a left-handed nut threadedly arranged on the left-handed screw rod, which is tightened to the workpiece to be fastened;

[0010] a right-handed screw rod arranged at one end of the left-handed screw rod away from the bolt head;

[0011] a right-handed nut threadedly arranged on the right-handed screw rod, which is abutted against the left-handed nut after being tightened.

[0012] The right-handed screw is provided with a loosening prevention device, and the loosening prevention device adopts a loosening prevention technology to prevent the right-handed nut from loosening.

[0013] In the above technical solution, further, one end of the head of the right-handed screw is a hollow structure.

[0014] In any of the above technical solutions, further, the hollow structure is a threaded hole.

[0015] In any of the above technical solutions, further, the loosening prevention device is a fastening bolt and a washer, the fastening bolt is screwed into the threaded hole of the right-handed screw, the external thread of the fastening bolt is threadedly matched with the internal thread of the threaded hole, and the right-handed nut can be effectively locked through the action of friction; the washer is arranged between the fastening bolt and the right-handed nut, and is used for increasing the pressing force of the right-handed nut, so as to improve the loosening prevention effect.

[0016] In any of the above technical solutions, further, the washer is elastic to realize shock absorption.

[0017] In any of the above technical solutions, further, the fastening bolt is provided with an unlocking groove, so that the fastening bolt can be installed and dismounted by using a tool.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. By adopting the combination of left-handed and right-handed threads, and arranging the loosening prevention device on the right-handed screw, the loosening prevention performance of the bolt and nut connection can be effectively improved, especially under complex working conditions such as high load, vibration and temperature change, the nut can be prevented from loosening, the long-term stability of the connection can be ensured, and the safety and reliability of the overall structure are improved;

[0020] 2. The fastening bolt is matched with the threaded hole of the right-handed screw, the right-handed nut can be effectively locked through friction, the right-handed nut can be prevented from loosening due to vibration or external impact, the washer acts between the fastening bolt and the right-handed nut by increasing the pressing force and improving the friction, so as to further enhance the loosening prevention effect;

[0021] 3. When the bolt connection is subjected to external vibration or impact, the washer can absorb and buffer these external forces, so as to reduce the direct influence of the vibration and impact force on the connection between the bolt and the nut, so that the nut can be prevented from loosening due to frequent vibration or impact in the long-term use process, the fastening state of the nut can be maintained, and the risk of loosening is reduced;

[0022] 4. By designing the unlocking groove on the fastening bolt, the unlocking groove provides the operating personnel with a way of installing and dismounting by using a special tool, and increases the safety, stability and efficiency of the operation, especially when the bolt is difficult to dismount due to over-tightening, corrosion, vibration and the like, the unlocking groove can effectively help the user to avoid problems such as tool slipping and bolt damage, improve the dismounting efficiency and ensure the smooth operation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the first kind of three-dimensional structure schematic diagram of the utility model;

[0024] Figure 2 is the second kind of three-dimensional structure schematic diagram of the utility model;

[0025] Figure 3 is the third kind of three-dimensional structure schematic diagram of the utility model;

[0026] Figure 4 is the exploded view of the utility model;

[0027] In the drawing, the reference signs are: 1, bolt head; 2, left-handed screw rod; 3, left-handed nut; 4, right-handed screw rod; 5, right-handed nut; 6, anti-loosening device; 61, threaded hole; 62, fastening bolt; 63, gasket; 7, unlocking groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0029] In the description of the present application, it should be noted that the terms used herein are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. In order to facilitate the description, the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The techniques, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but under appropriate circumstances, the techniques, methods and devices should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] Example 1:

[0031] AsFigures 1-4 The embodiment shown provides a left and right thread bolt, comprising:

[0032] a bolt head 1;

[0033] a left screw rod 2 arranged at both ends of the bolt head 1;

[0034] a left nut 3 arranged on the left screw rod 2 in a threaded manner, and the left nut 3 is screwed to a workpiece to be fastened;

[0035] a right screw rod 4 arranged at an end of the left screw rod 2 away from the bolt head 1;

[0036] a right nut 5 arranged on the right screw rod 4 in a threaded manner, and the right nut 5 is abutted against the left nut 3 after being screwed;

[0037] the right screw rod 4 is provided with a loosening prevention device 6, and the loosening prevention device 6 is used to prevent the right nut 5 from loosening.

[0038] In the technical solution, the connection between the nut and the bolt is subjected to force at both ends through the combination design of left and right thread, and the stability of the connection is improved. The loosening prevention device 6 arranged on the right screw rod 4 can effectively prevent the nut from loosening, especially in the case of vibration, reverse torque or temperature change. Through the addition of the loosening prevention device 6, it is ensured that the bolt and nut connection can still be fastened under extreme working conditions, and the nut will not loosen due to vibration or external force, so as to ensure the long-term stability of the connection structure.

[0039] Work flow: Before installation, first make sure the workpiece to be fastened is properly aligned with the installation position. Screw the left-handed nut 3 into the left-handed screw 2, and after the left-handed nut 3 is tightened, the workpiece to be fastened is fixed. At this time, the left-handed nut 3 fastens the workpiece through the left-handed screw 2, realizing the connection on one side. After the left-handed nut 3 is tightened, the right-handed nut 5 is screwed into the right-handed screw 4 until the right-handed nut 5 tightly abuts against the left-handed nut 3. The tightening of the right-handed nut 5 will generate a rotational torque opposite to the left-handed nut 3, thereby increasing the stability of the overall connection. The right-handed screw 4 is provided with a locking device 6, which functions to prevent the right-handed nut 5 from loosening during use due to vibration or reverse torque by increasing the friction of the threaded contact surface or providing additional locking force. Once the right-handed nut 5 and the left-handed nut 3 are both tightened and reinforced by the locking device 6, the entire bolt and nut connection forms a firm and stable fastening structure. In long-term use, especially when subjected to vibration or other external forces, the locking device 6 can effectively prevent the nut from loosening and ensure the safety of the bolt connection. Due to the opposite rotation of the left-handed nut 3 and the right-handed nut 5, they abut against each other and cooperate with each other, so the entire bolt connection structure is not prone to loosening during use. At the same time, the locking device 6 on the right-handed screw 4 can further enhance the stability of the connection, preventing the nut from loosening or falling off under the action of vibration or other mechanical external forces, thereby improving the safety and reliability of the connection.

[0040] Embodiment 2

[0041] The present embodiment provides a left and right-handed threaded bolt, in addition to the technical solutions of the above embodiments, further having the following technical features.

[0042] As shown in Figure 3 In this embodiment, the optimized end of the right-handed screw 4 where the head is located is a hollow structure.

[0043] In this technical solution, before installation, first ensure that the right-handed screw 4 of the bolt is designed as a hollow structure, and the screw head is hollow designed. Check the specifications and suitability of the bolt and nut to ensure that all components can be properly matched. Ensure that the hollow structure is not damaged and can normally withstand external forces.

[0044] As shown in Figure 3 In this embodiment, the optimized hollow structure is a threaded hole 61.

[0045] In this technical solution, the threaded hole 61 as a hollow structure can allow the user to operate at the head of the right-handed screw 4 through additional tools or accessories. For example, a screw or other accessory is inserted into the threaded hole 61, thereby strengthening or adjusting the connection of the bolt and providing more reliable anti-loosening function.

[0046] Workflow: Ensure that the right-handed screw rod 4 head is designed as a hollow structure, and the hollow structure is a threaded hole 61. In the production process, the threaded hole 61 is accurately machined according to the required specifications to ensure compatibility with other fittings. During installation, first install the left-handed nut 3 on the left-handed screw rod 2, and tighten the left-handed nut 3 to secure the workpiece to be fastened. At this time, the left-handed nut 3 and the left-handed screw rod 2 connect and fix the workpiece, and the stability of the bolt and nut connection is guaranteed. Then, install the right-handed nut 5 on the right-handed screw rod 4, and tighten the right-handed nut 5 until it is in close contact with the left-handed nut 3. At this time, the right-handed nut 5 acts on the left-handed nut 3 through the reverse torque, enhancing the fastening effect of the overall connection. By installing additional anti-loosening device 6 or adjusting components in the threaded hole 61 of the right-handed screw rod 4, it is ensured that the right-handed nut 5 will not loosen due to vibration or external force during use. The anti-loosening device 6 further enhances the locking effect of the nut by increasing the friction or resistance. Once all components are properly installed, the entire bolt connection will work stably. The right-handed nut 5 and the left-handed nut 3 interact to provide fastening to the workpiece. The design of the threaded hole 61 allows the bolt to have good structural stability and provides more flexibility for subsequent maintenance.

[0047] Example 3:

[0048] This embodiment provides a left and right-handed threaded bolt, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0049] As shown in Figure 2 , Figure 3 and Figure 4 , in this embodiment, the optimized anti-loosening device 6 is a fastening bolt 62 and a washer 63. The fastening bolt 62 is screwed into the threaded hole 61 of the right-handed screw rod 4, and the outer threads of the fastening bolt 62 are threadedly engaged with the inner threads of the threaded hole 61, allowing the right-handed nut 5 to be effectively locked by the action of friction. The washer 63 is arranged between the fastening bolt 62 and the right-handed nut 5 to increase the compression force of the right-handed nut 5, thereby improving the anti-loosening effect.

[0050] In this technical solution, the fastening bolt 62 cooperates with the threaded hole 61 of the right-handed screw rod 4 to effectively lock the right-handed nut 5 through friction, preventing the right-handed nut 5 from loosening due to vibration or external impact. The washer 63 acts between the fastening bolt 62 and the right-handed nut 5 by increasing the compression force and improving the friction, thereby further enhancing the anti-loosening effect. The arrangement of the washer 63 can effectively distribute the contact pressure between the fastening bolt 62 and the right-handed nut 5, making the connection more uniform and reducing the risk of wear or unstable connection caused by excessive local pressure. The anti-loosening device 6 can maintain its fastening performance over a long period of use, especially in environments with frequent vibration, impact, or large load changes, effectively improving the durability and safety of the bolt connection.

[0051] Work flow: Tighten the fastening bolt 62 into the threaded hole 61 of the right-hand threaded screw 4, the external threads of the fastening bolt 62 match the internal threads in the threaded hole 61, and the fastening bolt 62 is tightened by rotating operation, generating a certain friction force. The friction force between the fastening bolt 62 and the right-hand threaded screw 4 enables the right-hand threaded nut 5 to be locked under the action of the fastening bolt 62, thereby reducing the risk of nut loosening. At this time, the right-hand threaded nut 5 is in a fastened state, and the friction force makes it firmly contact with the bolt connection part. The washer 63 is installed between the fastening bolt 62 and the right-hand threaded nut 5. The washer 63 can increase the compression force, increase the contact area and disperse the pressure, ensure that the nut is more firmly compressed on the bolt, further increase the friction force, and avoid loosening of the nut due to external force. At the same time, the material of the washer 63 also helps to slow down the slight loosening caused by vibration or external force, and plays a buffering role. Due to the friction force and the effect of the washer 63, the connection between the nut and the bolt is effectively strengthened, so that the nut and the bolt can continuously maintain a fastened state during long-term use, especially in a vibrating and impacting environment.

[0052] As shown in Figure 2 , Figure 3 and Figure 4 , in this embodiment, the optimized washer 63 has elasticity to achieve shock absorption.

[0053] In this technical solution, when the bolt connection is subjected to external vibration or impact, the washer 63 absorbs and buffers these external forces, thereby reducing the direct impact of vibration and impact force on the connection between the bolt and the nut. This can prevent the nut from loosening due to frequent vibration or impact during long-term use. The elastic washer 63 increases the elastic pressure on the contact surface during tightening, making the contact between the nut and the bolt connection part more stable. It provides additional elastic tension, which helps to maintain the compression force of the nut, and even when subjected to external vibration or impact, it can still maintain the fastened state of the nut and reduce the risk of loosening. The role of the elastic washer 63 is not only to absorb shock, but also to help enhance the anti-loosening effect. The elastic properties of the washer 63 can maintain the connection pressure between the nut and the bolt under the influence of external forces through slight compression and rebound, thereby effectively reducing the loosening of the nut. Especially for equipment working in high-load, severe vibration or temperature fluctuation environments, the elastic washer 63 is particularly important. By absorbing vibration energy and relieving impact load, the elastic washer 63 can prolong the service life of the bolt connection and reduce the frequency of material fatigue or bolt loosening caused by vibration. Especially in environments with multiple disassembly and repeated vibration, the buffering effect of the elastic washer 63 can significantly improve the reliability of the connection. The elastic washer 63 can adjust its compression degree according to different vibration or load conditions, providing more precise control for bolt connections, especially for high-frequency vibration or variable load application scenarios.

[0054] As shown in Figure 2 and Figure 3 In this embodiment, the optimized fastening bolt 62 is provided with an unlocking groove 7 to facilitate the installation and removal of the fastening bolt 62 using tools.

[0055] In this technical solution, by designing the unlocking groove 7 on the fastening bolt 62, the device enables the user to use special tools (such as wrenches, plug tools, etc.) when installing or removing, improving the efficiency of disassembly and ensuring safety during the fastening process. This design enables the user to successfully disassemble even if the bolt has been tightened very tightly, avoiding damage or inconvenience during the installation / removal process due to manual operation difficulties or lack of tools.

[0056] Specifically, the unlocking groove 7 makes the installation and removal of the bolt more convenient. Using tools (such as notched wrenches, specially designed removal tools) inserted into the unlocking groove 7, the bolt can be easily screwed into or out of the threaded hole 61 with appropriate rotational force, especially when the bolt becomes difficult to disassemble due to tightening or corrosion during use. In some high safety requirement applications (such as high pressure containers, aerospace equipment, etc.), the installation and removal of the bolt must be very precise to avoid accidental loosening or improper disassembly. By designing the unlocking groove 7, the effective cooperation of the tool and the bolt can be ensured, reducing human error and unsafe factors. During normal installation, especially when the bolt is tight, disassembly can easily cause damage or deformation of the bolt due to excessive friction or lack of appropriate tools. The design of the unlocking groove 7 can reduce this risk, making the installation and removal process more stable and effectively avoiding safety hazards caused by bolt damage. The unlocking groove 7 allows the use of special tools, such as slot wrenches, and shape-matched removal tools, to quickly and effectively disassemble. Especially in environments that require frequent disassembly, the unlocking groove 7 can greatly improve operational efficiency, saving time and labor. The design of the unlocking groove 7 can be compatible with various types of removal tools, and different operators can choose different specifications of tools for operation as needed, improving the versatility of the tools and making maintenance more flexible.

[0057] The embodiments of the present application are described above in conjunction with the drawings, and the embodiments and features in the present application can be combined with each other without conflict, and the present application is not limited to the above specific embodiments, which are only illustrative and not limiting. Those skilled in the art can make many forms without departing from the purpose of the present application and the scope protected by the claims under the inspiration of the present application, which all belong to the protection of the present application.

Claims

1. A left-hand or right-hand thread bolt characterized by, The utility model relates to a kind of anti-loosening device of right-hand screw rod, including: Bolt head (1); Left-hand screw rod (2) is arranged on the upper and lower ends of the bolt head (1); Left-hand nut (3) is threadedly arranged on the left-hand screw rod (2), and the left-hand nut (3) is tightened to the workpiece to be fastened; Right-hand screw rod (4) is arranged on the end of the left-hand screw rod (2) away from the bolt head (1); Right-hand nut (5) is threadedly arranged on the right-hand screw rod (4), and the right-hand nut (5) is abutted against left-hand nut (3) after being tightened; Anti-loosening device (6) is provided on the right-hand screw rod (4), and the anti-loosening device (6) is used to prevent the right-hand nut (5) from loosening by using anti-loosening technology.

2. A left and right hand thread bolt according to claim 1 wherein, The end where the head of the right-hand screw rod (4) is located is a hollow structure.

3. A left and right hand thread bolt according to claim 2 wherein, The hollow structure is a threaded hole (61).

4. A left and right hand thread bolt according to claim 3 wherein, The anti-loosening device (6) is a fastening bolt (62) and a washer (63), the fastening bolt (62) is screwed into the threaded hole (61) of the right-hand screw rod (4), the outer thread of the fastening bolt (62) is threadedly matched with the inner thread of the threaded hole (61), and the right-hand nut (5) can be effectively locked by the action of friction; the washer (63) is arranged between the fastening bolt (62) and the right-hand nut (5), for increasing the pressing force of the right-hand nut (5), so as to improve the anti-loosening effect.

5. A left and right hand thread bolt according to claim 4 wherein, The washer (63) is elastic to realize shock absorption.

6. A left and right hand thread bolt according to claim 4 wherein, The fastening bolt (62) is provided with an unlocking groove (7) to facilitate the installation and removal of the fastening bolt (62) by using a tool.

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