Fastener for aerospace

Abstract

The utility model relates to the technical field of fasteners, and discloses an aerospace fastener which comprises a screw body, the top end of the screw body is fixedly connected with a nut body, a traction groove is formed in the surface of the screw body, and an anti-skid mechanism used for preventing the screw body from skid is installed in the traction groove. The anti-skid mechanism comprises a traction block sliding in the traction groove, and the outer side of the traction block is fixedly connected with a movable sleeve. According to the fastener for aerospace, after the screw main body is screwed into a specified groove, the movable sleeve can make contact with the surface of equipment and make the elastic spring generate compression force, the movable sleeve drives the screw main body to generate axial elastic force, and the elastic force can increase the friction force between the screw main body and the corresponding groove; the nut body and the screw body are prevented from reversely rotating relative to the corresponding grooves in the vibration process, so that the fastener is effectively prevented from loosening, and the use stability of the fastener is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a fastener for aerospace applications. Background Technology

[0002] Fasteners are a class of mechanical parts used to connect two or more parts or components together. Their main function is to provide clamping force to make the connected objects fit together tightly, so as to ensure the integrity and stability of the structure. There are many types of fasteners, including bolts, nuts, rivets, pins, washers, etc. Aerospace fasteners are a special application category of fasteners. They are based on the basic principles and structural design of ordinary fasteners, but their performance requirements are far higher than those of ordinary fasteners.

[0003] Chinese patent discloses a fastener (authorization announcement number CN208966781U). The patented technology has a reasonable design structure. The whole structure is made of stainless steel, which is corrosion-resistant, high temperature-resistant, tough, and has a long service life. It does not require frequent maintenance and has high efficiency. There is no deformation or breakage. At the same time, the split structure used in conjunction with it can be adapted to the assembly and adjustment as needed, ensuring the safety and stability of the assembled structure.

[0004] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: Existing fasteners used in the aerospace field are difficult to adapt to the severe vibrations that related equipment will experience during takeoff and landing in aerospace missions. Under the action of strong vibrations, ordinary fasteners are very prone to rotation, which will cause the originally fastened objects to loosen, thereby seriously threatening the stability of equipment operation and posing potential risks to aerospace missions. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the fasteners in the prior art are prone to rotation or even slippage due to vibration. To address this, we propose a fastener for aerospace applications.

[0006] To achieve the above objectives, this application adopts the following technical solution: an aerospace fastener, comprising a screw body, a nut body fixedly connected to the top end of the screw body, a traction groove formed on the surface of the screw body, an anti-slip mechanism for preventing the screw body from slipping installed inside the traction groove, the anti-slip mechanism comprising a traction block sliding inside the traction groove, a movable sleeve fixedly connected to the outer side of the traction block, and a spring fixedly connected to the end of the nut body near the movable sleeve, the end of the spring near the movable sleeve being fixedly connected to the movable sleeve.

[0007] Preferably, the top of the nut body is provided with a slot, and a drying powder storage chamber is slidably connected inside the slot. Two slots are provided inside the slot, and two buckles are fixedly connected to the bottom of the drying powder storage chamber. The slots and buckles are engaged.

[0008] Preferably, the traction groove has sliding grooves on both sides, and the traction block has sliders fixedly connected to both sides, with the inside of the sliding groove slidably connected to the sliders.

[0009] Preferably, a contact plate is installed at the bottom end of the movable sleeve, and the contact plate is made of rubber.

[0010] Preferably, a reinforcing core is installed inside the screw body, and the reinforcing core is made of alloy steel.

[0011] Preferably, the surface of the screw body is covered with a metal protective film.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] In this invention, after the screw body is screwed into the designated groove, the movable sleeve will contact the surface of the equipment and cause the elastic spring to generate a compressive force, which causes the movable sleeve to drive the screw body to generate an axial elastic force. This elastic force increases the friction between the screw body and the corresponding groove, preventing the nut body and the screw body from rotating in the opposite direction to the corresponding groove during vibration, thereby effectively preventing the fastener from loosening and thus effectively improving the stability of the fastener during use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the fastener of this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the internal structure of the fastener of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the fastener of this utility model;

[0017] Figure 4 This is a schematic cross-sectional view of the drying powder storage compartment of this utility model;

[0018] Figure 5 This is a cross-sectional schematic diagram of the traction block auxiliary movement structure of this utility model.

[0019] Illustrations: 1. Screw body; 2. Nut body; 3. Traction groove; 4. Traction block; 5. Moving sleeve; 6. Spring; 7. Slot; 8. Dry powder storage bin; 9. Slot; 10. Buckle; 11. Slide groove; 12. Slider; 13. Contact plate; 14. Reinforcing core. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] Reference Figure 1 - Figure 3 As shown, this utility model provides a technical solution: an aerospace fastener, including a screw body 1, a nut body 2 fixedly connected to the top of the screw body 1, a traction groove 3 formed on the surface of the screw body 1, and an anti-slip mechanism for preventing the screw body 1 from slipping inside the traction groove 3. The anti-slip mechanism includes a traction block 4 sliding inside the traction groove 3, a movable sleeve 5 fixedly connected to the outside of the traction block 4, and a spring spring 6 fixedly connected to one end of the nut body 2 near the movable sleeve 5. The end of the spring spring 6 near the movable sleeve 5 is fixedly connected to the movable sleeve 5. When the screw body 1 is screwed into the designated groove, the movable sleeve 5 will contact the equipment surface and cause the spring spring 6 to generate a compressive force, causing the movable sleeve 5 to drive the screw body 1 to generate an axial elastic force. This elastic force increases the friction between the screw body 1 and the corresponding groove, preventing the nut body 2 and the screw body 1 from rotating in the opposite direction to the corresponding groove during vibration, thereby effectively preventing the fastener from loosening and thus effectively improving the stability of the fastener during use.

[0022] Reference Figure 4 As shown in this embodiment: a slot 7 is provided at the top of the nut body 2, and a desiccant storage chamber 8 is slidably connected inside the slot 7. Two slots 9 are provided inside the slot 7, and two buckles 10 are fixedly connected to the bottom of the desiccant storage chamber 8. The slots 9 and buckles 10 are engaged. By setting the desiccant storage chamber 8 inside the nut body 2, when the fastener is used in a high humidity environment, it can absorb the moisture in the surrounding environment, reduce the humidity around the screw body 1, and thus effectively prevent corrosion problems caused by humidity. This is very important for extending the service life of the screw body 1, especially when it is in a harsh environment for a long time, which can greatly reduce maintenance costs and replacement frequency.

[0023] Reference Figure 5 As shown in this embodiment: sliding grooves 11 are provided on both sides of the traction groove 3, and sliders 12 are fixedly connected to both sides of the traction block 4. The interior of the sliding groove 11 is slidably connected to the slider 12. Through the setting of the sliding groove 11 and the slider 12, the movable sleeve 5 can be provided with a stable guiding and limiting function when moving inside the traction groove 3, thereby making the movable sleeve 5 move more stably and effectively improving the stability during use.

[0024] Reference Figure 3As shown in this embodiment: a contact plate 13 is installed at the bottom of the movable sleeve 5. The contact plate 13 is made of rubber. By using a rubber contact plate 13, when the movable sleeve 5 contacts the surface of the equipment, the movable sleeve 5 can have greater friction with the surface of the equipment, thereby further improving the anti-slip ability of the screw body 1.

[0025] Reference Figure 2 As shown in this embodiment: a reinforcing core 14 is installed inside the screw body 1. The reinforcing core 14 is made of alloy steel. By adopting the reinforcing core 14, when the screw body 1 is subjected to lateral force or bending moment, the reinforcing core 14 can effectively resist bending deformation. For example, in some aviation equipment with high pressure, the screw body 1 with the reinforcing core 14 can better maintain its straightness, reduce component misalignment or wear caused by bending, and extend the service life of the equipment.

[0026] Reference Figure 1 As shown in this embodiment, a metal protective film is applied to the surface of the screw body 1. By applying a metal protective film to the surface of the screw body 1, when a corrosive liquid generated in the external environment comes into contact with the screw body 1, the metal protective film on the surface of the screw body 1 can first come into contact with the corrosive liquid, thereby effectively protecting the screw body 1 inside the metal protective film and further improving the stability during use.

[0027] Working Principle: By setting a desiccant chamber 8 inside the nut body 2, when the fastener is used in a high-humidity environment, it can absorb moisture from the surrounding environment, reducing the humidity around the screw body 1, thereby effectively preventing corrosion caused by humidity. This is very important for extending the service life of the screw body 1, especially when it is in a harsh environment for a long time, which can greatly reduce maintenance costs and replacement frequency. The sliding groove 11 and the slider 12 provide stable guidance and limiting function for the moving sleeve 5 when it moves inside the traction groove 3, thus enabling... The movable sleeve 5 moves more stably, effectively improving stability during use. By using a rubber contact plate 13, when the movable sleeve 5 contacts the equipment surface, it can increase the friction between the movable sleeve 5 and the equipment surface, thereby further improving the anti-slip ability of the screw body 1. By using a reinforcing core 14, when the screw body 1 is subjected to lateral force or bending moment, the reinforcing core 14 can effectively resist bending deformation. For example, in some aerospace equipment with high pressure, the screw body 1 with a reinforcing core 14 can better maintain its straightness, reduce component misalignment or wear caused by bending, and extend the service life of the equipment. By applying a metal protective film to the surface of the screw body 1, when corrosive liquids generated in the external environment come into contact with the screw body 1, the metal protective film on the surface of the screw body 1 can first come into contact with the corrosive liquid, thereby effectively protecting the screw body 1 inside the metal protective film and further improving stability during use.

[0028] 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. Aerospace fastener comprising a screw body (1), characterized in that: The top end of the screw body (1) is fixedly connected with a screw cap body (2), the surface of the screw body (1) is provided with a traction groove (3); The inside of the traction groove (3) is provided with an anti-skid mechanism for preventing the screw body (1) from skidding.

2. The aerospace fastener of claim 1, wherein: The anti-skid mechanism comprises a traction block (4) sliding in the traction groove (3), the outer side of the traction block (4) is fixedly connected with a moving sleeve (5), one end of the screw cap body (2) close to the moving sleeve (5) is fixedly connected with an elastic spring (6), and one end of the elastic spring (6) close to the moving sleeve (5) is fixedly connected with the moving sleeve (5).

3. The aerospace fastener of claim 1, wherein: The top end of the screw cap body (2) is provided with a slot (7), the inside of the slot (7) is slidingly connected with a dry powder placing bin (8), the inside of the slot (7) is provided with two clamping grooves (9), the bottom end of the dry powder placing bin (8) is fixedly connected with two buckles (10), and the clamping grooves (9) and the buckles (10) are clamped.

4. The aerospace fastener of claim 2, wherein: The inside of the traction groove (3) is provided with a sliding groove (11) on both sides, the two sides of the traction block (4) are fixedly connected with sliding blocks (12), and the inside of the sliding groove (11) is slidingly connected with the sliding blocks (12).

5. The aerospace fastener of claim 2, wherein: The bottom end of the moving sleeve (5) is provided with a contact plate (13), and the material of the contact plate (13) is rubber.

6. The aerospace fastener of claim 1, wherein: The inside of the screw body (1) is provided with a reinforcing core (14), and the material of the reinforcing core (14) is alloy steel.

7. The aerospace fastener of claim 1, wherein: The surface of the screw body (1) is coated with a metal protective film.

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