Anti-loosening aviation special bolt connecting piece

Abstract

The utility model discloses an anti-loosening aviation special bolt connecting piece in the technical field of aviation fasteners, and aims to solve the technical problem that the conventional aviation bolt connecting piece is easy to loosen under the conditions of dynamic load and long-term service. The connecting piece mainly comprises a bolt head, a bolt rod, a nut and an anti-loosening mechanism, the bolt rod is provided with an external thread and a positioning groove, the nut is arranged on the bolt rod in a threaded and sleeving mode, and the nut is in threaded fit with the positioning nail through the threaded groove to achieve mechanical locking; the movable end of the positioning nail is inserted into the positioning groove of the bolt rod, and the other end is provided with a control head which is convenient to install and adjust; in addition, a circular gasket is arranged between the nut and the bolt head, a fixing block is matched with a fixing groove of the nut, the spiral direction of a wedge block is opposite to that of external threads, and the connection stability is enhanced. According to the design, the locking structure is simplified, the cost is reduced, the mounting efficiency and the connection reliability are improved, the locking structure is suitable for various aircraft connection parts, and the safety and the durability of the aircraft structure are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation fasteners, in particular to an aviation special bolt connection piece which can prevent loosening. Background Art

[0002] In the aviation field, bolted connections, as a critical fastener, are widely used in various parts of aircraft structures, including but not limited to the connection of key parts such as wings, fuselages, tailplanes, and landing gear. These connections must withstand extreme temperature fluctuations, vibration, shock, and various mechanical and environmental stresses, placing extremely high demands on their performance. However, in actual use, bolted connections often experience loosening due to factors such as vibration, temperature fluctuations, and material fatigue. This can lead to structural failure and even serious safety accidents.

[0003] Existing aviation-specific bolted connections primarily rely on traditional fastening methods, such as using ordinary nuts, washers, and bolts. While simple, this connection method lacks an effective self-locking mechanism, which can easily lead to loosening under dynamic loads and long-term service. To address this issue, additional locking elements such as spring washers and nylon lock nuts are often required. However, these solutions often have limitations, such as complex installation, increased costs, and inconvenient maintenance.

[0004] In response to the above problems, this application document provides a special aviation bolt connection that prevents loosening. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems raised in the above background technology and to provide a special aviation bolt connector that can prevent loosening.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A special aviation bolt connector for preventing loosening, comprising a bolt head, a bolt rod, a nut and an anti-loosening mechanism, wherein:

[0008] The bolt rod is fixedly connected to the bolt head, an external thread is formed on the outer circumference of the bolt rod, and a positioning groove is formed on the outer side of the bolt rod along the length direction;

[0009] The nut thread is sleeved on the bolt rod;

[0010] The anti-loosening mechanism includes a positioning nail that is movably inserted through the nut, and one end of the positioning nail is movably inserted into the interior of the positioning groove.

[0011] Furthermore, a thread groove is formed on the outer side of the nut, and the positioning pin is threadedly inserted into the thread groove.

[0012] Furthermore, a control head is fixed to one end of the positioning nail, and a hexagonal socket is configured on the end of the control head facing away from the positioning nail.

[0013] Furthermore, a receiving groove communicating with the thread groove is constructed on the outer side of the nut, and the control head can be completely moved into the interior of the receiving groove.

[0014] Furthermore, the bolt head and the nut are both hexagonal heads.

[0015] Furthermore, the number of the positioning grooves is four and they are distributed in an array, and three thread grooves are constructed on the nut, and the three thread grooves are respectively constructed on three side surfaces of the nut that are connected in sequence.

[0016] Furthermore, a circular gasket sleeved on the bolt rod is movably provided between the nut and the bolt head.

[0017] Furthermore, one end of the nut is constructed with a plurality of fixing grooves distributed in an array, one end of the circular gasket is constructed with a plurality of fixing blocks distributed in an array, and the plurality of fixing blocks are movably inserted into the interior of the plurality of fixing grooves.

[0018] Furthermore, a plurality of wedges distributed in an array are constructed on the other end of the circular gasket, and the directions of the wedges are opposite to the spiral direction of the external thread on the bolt rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This solution forms a mechanical locking mechanism by providing a positioning groove on the bolt rod and a threaded groove on the nut, in conjunction with the use of a positioning pin. The positioning pin is inserted into the positioning groove, which enhances the stability of the connection and effectively prevents relative rotation of the bolt and nut due to vibration or impact, thereby preventing loosening.

[0021] This solution avoids the use of additional locking elements, such as nylon locking nuts, and instead achieves a self-locking function through the ingenious design of the internal structure, which simplifies the locking structure, reduces the number of components, and reduces the complexity of manufacturing and maintenance.

[0022] The use of the circular gasket in this solution not only provides additional preload, but also enhances the sealing performance of the connection part.

[0023] The wedge in this solution is designed to face in the opposite direction to the spiral direction of the external thread on the bolt shank. This design can provide additional friction during the tightening process and enhance the durability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0025] Figure 2 For this utility model Figure 1 A three-dimensional cross-sectional view of

[0026] Figure 3 For this utility model Figure 1 A schematic diagram of the three-dimensional structure in another state;

[0027] Figure 4 For this utility model Figure 1 Schematic diagram of the three-dimensional structure of the middle part;

[0028] Figure 5 For this utility model Figure 1 A schematic diagram of the three-dimensional structure of another part of the structure.

[0029] In the figure: 1. Bolt head; 2. Bolt rod; 21. Positioning groove; 3. Nut; 31. Threaded groove; 32. Accommodating groove; 33. Fixing groove; 4. Anti-loosening mechanism; 41. Positioning pin; 42. Control head; 43. Hexagon socket; 5. Circular gasket; 51. Fixing block; 52. Wedge block. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0031] The present application provides an aviation special bolt connector that prevents loosening, which is mainly used to solve the problem that existing aviation special bolt connectors mainly rely on traditional fastening methods, such as using ordinary nuts, washers and bolts for connection. Although this connection method is simple, it is easy to cause the connector to loosen under dynamic loads and long-term service conditions due to the lack of an effective self-locking mechanism. In order to solve this problem, additional locking elements such as spring washers and nylon locking nuts are usually required. However, these solutions often have certain limitations, such as complex installation, increased costs, and inconvenient maintenance. The following technical solutions are provided, which will be combined with Figure 1-Figure 5 Give detailed instructions:

[0032] In a specific embodiment of the present invention, a special aviation bolt connector is provided. The connector effectively solves the problem of bolt connectors in the aviation field being prone to loosening under high dynamic loads through a sophisticated structural design. The connector mainly includes a bolt head 1, a bolt rod 2, a nut 3 and an anti-loosening mechanism 4, wherein:

[0033] The bolt shank 2 is fixedly connected to the bolt head 1, forming the basic structure of the bolt. The outer peripheral side of the bolt shank 2 is formed with an external thread, and the outer side of the bolt shank 2 is formed with a positioning groove 21 along the length direction. These positioning grooves 21 are used to cooperate with the anti-loosening mechanism 4;

[0034] The nut 3 is threadedly sleeved on the bolt rod 2, and its internal thread matches the external thread of the bolt rod 2. By rotating the nut 3, the bolt rod 2 can be tightened or loosened. The material of the nut 3 is preferably high-strength stainless steel. These materials have excellent strength and corrosion resistance and are suitable for the stringent material requirements of the aviation field.

[0035] The anti-loosening mechanism 4 is the core part of this solution. The anti-loosening mechanism 4 includes a positioning pin 41 that is movably inserted through the nut 3. One end of the positioning pin 41 is movably inserted into the interior of the positioning groove 21. The material of the positioning pin 41 is selected from alloy steel with high hardness and wear resistance to ensure its stable performance in long-term service.

[0036] In terms of operation, first, the bolt head 1 and the bolt rod 2 are fixedly connected, and then the nut 3 is sleeved on the external thread of the bolt rod 2. Next, the positioning pin 41 of the anti-loosening mechanism 4 is inserted into the nut 3, and one end of the nut 3 is movably inserted into the positioning groove 21 of the bolt rod 2, which can prevent the nut 3 and the bolt rod 2 from rotating relative to each other and effectively prevent loosening.

[0037] The embodiments of the present utility model provide a special aviation bolt connector that prevents loosening and has a simple structure, easy operation, low cost and high reliability. Through the cooperation of the positioning groove 21 and the positioning pin 41, a mechanical self-locking mechanism is realized, which significantly improves the stability and durability of the connector under high dynamic loads. In addition, the design has good versatility and adaptability, and can be widely used in different connection parts of aircraft, thereby improving the overall safety and reliability of the aircraft. Due to the use of high-strength and corrosion-resistant materials, the connector of this solution also has a long service life and low maintenance cost.

[0038] See also Figure 2 、 Figure 3 and Figure 5 A thread groove 31 is constructed on the outside of the nut 3, and the positioning pin 41 is threadedly inserted into the thread groove 31. This thread fit allows the positioning pin 41 to slide axially inside the nut 3, ensuring that one end of the positioning pin 41 is stably inserted into the positioning groove 21, thereby effectively preventing the nut 3 from loosening.

[0039] A control head 42 is fixed to one end of the positioning pin 41, and a hexagonal slot 43 is constructed on the end of the control head 42 facing away from the positioning pin 41. The design of the hexagonal slot 43 makes it possible to use a hexagonal wrench or other corresponding tools to rotate the control head 42, thereby achieving precise control of the positioning pin 41. The design of the hexagonal slot 43 also provides a stable gripping point, making operation more convenient and labor-saving.

[0040] The outer side of the nut 3 is provided with a receiving groove 32 that communicates with the thread groove 31. The control head 42 can be completely moved into the receiving groove 32. This design can hide the control head 42 after the nut 3 is assembled, preventing the protruding part from interfering with or damaging the surrounding structure, while also providing an aesthetically pleasing solution.

[0041] In actual operation, first insert the positioning pin 41 into the thread groove 31, and then use a tool to rotate the control head 42 so that the positioning pin 41 moves to a predetermined position along the thread groove 31. When the preload force of the bolt connection needs to be adjusted, the position of the positioning pin 41 can be adjusted by rotating the control head 42 to achieve precise control. After assembly is completed, the control head 42 is rotated into the receiving groove 32 so that it is flush with the outside of the nut 3 to complete the assembly.

[0042] The embodiment of the present utility model provides an anti-loosening solution with a compact structure and easy operation. The threaded fit between the threaded groove 31 and the positioning pin 41 allows precise adjustment of the preload force, thereby improving the reliability of the connector. The design of the control head 42 and the hexagonal groove 43 makes the operation of the positioning pin 41 more convenient and safer, reducing possible errors during operation. The design of the accommodating groove 32 not only provides an aesthetically pleasing solution, but also avoids potential damage to surrounding structures by the protruding part of the control head 42, thereby improving the safety and practicality of the overall design.

[0043] See also Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The bolt head 1 and the nut 3 are both hexagonal heads. This design provides a larger contact area, which allows for more even distribution of torque when tightening or loosening the bolt, reduces local stress concentration, and also facilitates operation using a standard wrench or other tools.

[0044] There are four positioning grooves 21 and they are distributed in an array. This layout provides multiple positioning points, which increases the convenience of positioning between the bolt rod 2 and the nut 3. At the same time, three thread grooves 31 are constructed on the nut 3. The three thread grooves 31 are respectively constructed on three side surfaces of the nut 3 connected in sequence. The arrangement of the three thread grooves 31 and the four positioning grooves 21 only requires a thirty-degree rotation, and there will inevitably be a thread groove 31 corresponding to the positioning groove 21, which can effectively ensure that one end of the positioning pin 41 is inserted into one of the positioning grooves 21, thereby fixing the nut 3 and the bolt rod 2 and avoiding the situation where the positioning pin 41 cannot correspond to the positioning groove 21.

[0045] During operation, first align the bolt head 1 with the nut 3. Since both are hexagonal head designs, a hexagonal wrench can be used to quickly tighten or loosen them. Then, insert the positioning pin 41 into the corresponding thread groove 31 and ensure that one of the positioning grooves 21 is correctly aligned with one of the thread grooves 31 on the nut 3. By rotating the control head 42, the positioning pin 41 can be moved in the thread groove 31, thereby achieving the tightening of the nut 3 and the bolt rod 2.

[0046] See also Figure 2 、 Figure 3 and Figure 5 In a specific embodiment of the present invention, in order to enhance the stability and anti-loosening performance of the aviation special bolt connection, a circular gasket 5 is movably arranged between the nut 3 and the bolt head 1 and is sleeved on the bolt rod 2. This design not only provides additional pre-tightening force, but also enhances the sealing performance of the connection.

[0047] One end of the nut 3 is provided with a plurality of fixing grooves 33 distributed in an array, and one end of the circular gasket 5 is provided with a plurality of fixing blocks 51 distributed in an array. The plurality of fixing blocks 51 are movably inserted into the interior of the plurality of fixing grooves 33. This array distribution design enables the circular gasket 5 to contact the nut 3 evenly, ensuring uniform distribution of the preload force, and is also convenient for installation and adjustment.

[0048] The other end of the circular washer 5 is provided with a plurality of wedges 52 arranged in an array. The direction of the wedges 52 is opposite to the spiral direction of the external thread on the bolt shank 2. This design enables the wedges 52 to interact with the aviation component when the nut 3 is tightened, generating a force opposite to the tightening direction, thereby providing an additional anti-loosening effect.

[0049] During operation, the circular washer 5 is first placed on the bolt shank 2, ensuring that the fixing block 51 is aligned with the fixing groove 33 on the nut 3. Then, the fixing block 51 is inserted into the fixing groove 33 to position the circular washer 5 on the nut 3. Then, the bolt is tightened by rotating the nut 3. The wedge 52 will interact with the aviation component to further enhance the stability of the connection.

[0050] The embodiments of the present utility model provide a special aviation bolt connector with a stable structure and easy operation to prevent loosening. The design of the circular gasket 5 not only enhances the preload force and sealing performance of the connector, but also provides an additional anti-loosening effect through the wedge block 52. The array distribution design of the fixing groove 33 and the fixing block 51 makes the preload force evenly distributed, thereby improving the stability and reliability of the connection. The reverse design of the wedge block 52 effectively prevents loosening caused by vibration or impact, especially under dynamic load and long-term service conditions, significantly improving the anti-loosening performance of the connector.

[0051] Installation steps of bolt connectors:

[0052] First, place the circular washer 5 on the bolt shank 2, ensuring that the end with the fixing block 51 faces away from the bolt head 1. This step ensures the correct installation direction of the washer, laying the foundation for subsequent fixing and uniform distribution of preload force.

[0053] Next, thread the nut 3 onto the bolt shank 2. In this step, it is necessary to ensure that the internal thread of the nut 3 matches the external thread of the bolt shank 2 correctly to achieve a good screwing engagement.

[0054] Move the circular washer 5 so that the fixing block 51 is inserted into the fixing groove 33 on the nut 3. This step is to ensure the fixation between the circular washer 5 and the nut 3 and provide stable support for the next tightening operation;

[0055] After the nut 3 is moved to the predetermined position, the nut 3 is adjusted so that one of the thread grooves 31 corresponds to one of the positioning grooves 21. This step is key to ensuring that the anti-loosening mechanism 4 can be correctly installed. The thread groove 31 and the positioning groove 21 need to be precisely aligned.

[0056] At this time, the positioning pin 41 of the anti-loosening mechanism 4 is inserted into the thread groove 31, and one end of the positioning pin 41 is ensured to be movably inserted into the positioning groove 21 of the bolt rod 2. The insertion of the positioning pin 41 provides a mechanical self-locking mechanism for the bolt connection, effectively preventing the nut 3 from loosening under high dynamic loads.

[0057] Until the control head 42 rotates into the receiving groove 32, the nut 3 is ensured to be fixed to the bolt rod 2. The rotation and positioning of the control head 42 not only makes the appearance of the bolt connection neat, but also ensures that the control head 42 does not protrude and interfere with the surrounding structure.

[0058] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-loosening aviation special bolt connector, comprising a bolt head (1), a bolt rod (2), a nut (3) and an anti-loosening mechanism (4), characterized in that: in: The bolt rod (2) is fixedly connected to the bolt head (1), an external thread is formed on the outer peripheral side of the bolt rod (2), and a positioning groove (21) is formed on the outer side of the bolt rod (2) along the length direction; The nut (3) is threadably sleeved on the bolt rod (2); The anti-loosening mechanism (4) comprises a positioning pin (41) movably inserted through the nut (3), and one end of the positioning pin (41) is movably inserted into the interior of the positioning groove (21).

2. The anti-loosening aviation special bolt connector according to claim 1, characterized in that: A thread groove (31) is formed on the outer side of the nut (3), and the positioning pin (41) is threadedly inserted into the thread groove (31).

3. The anti-loosening aviation special bolt connector according to claim 2, characterized in that: A control head (42) is fixed to one end of the positioning pin (41), and a hexagonal socket (43) is formed on the end of the control head (42) facing away from the positioning pin (41).

4. The anti-loosening aviation special bolt connector according to claim 3, characterized in that: An accommodating groove (32) communicating with the thread groove (31) is formed on the outer side of the nut (3), and the control head (42) can be completely moved into the interior of the accommodating groove (32).

5. The anti-loosening aviation special bolt connector according to claim 4, characterized in that: The bolt head (1) and the nut (3) are both hexagonal heads.

6. The anti-loosening aviation special bolt connector according to claim 5, characterized in that: The number of the positioning grooves (21) is four and they are distributed in an array. The nut (3) is provided with three thread grooves (31). The three thread grooves (31) are respectively formed on three sequentially connected side surfaces of the nut (3).

7. The anti-loosening aviation special bolt connector according to claim 1, characterized in that: A circular gasket (5) sleeved on the bolt rod (2) is movably provided between the nut (3) and the bolt head (1).

8. The anti-loosening aviation special bolt connector according to claim 7, characterized in that: One end of the nut (3) is provided with a plurality of fixed grooves (33) distributed in an array, and one end of the circular gasket (5) is provided with a plurality of fixed blocks (51) distributed in an array. The plurality of fixed blocks (51) are movably inserted into the interior of the plurality of fixed grooves (33).

9. The anti-loosening aviation special bolt connector according to claim 8, characterized in that: A plurality of wedge blocks (52) distributed in an array are constructed on the other end of the circular gasket (5), and the orientation of the wedge blocks (52) is opposite to the spiral direction of the external thread on the bolt rod (2).

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