A connecting bolt structure for strengthening lightweight materials

Abstract

The present invention belongs to a connecting bolt structure for strengthening lightweight materials, including a reinforcing ring and a connecting bolt. The reinforcing ring is arranged inside the lightweight upper plate, and the connecting bolt is arranged inside the reinforcing ring. A connecting middle plate is arranged below the lightweight upper plate, and a fixed bottom plate is arranged below the connecting middle plate. The bottom of the connecting bolt is arranged inside the fixed bottom. By using the form of a reinforcing ring and a bolt, the present invention not only strengthens the lightweight plate, but also connects the lightweight plate with plates of other materials. Moreover, the pin that would originally move freely in the reinforcing ring is changed into a threaded connection form that can be fixed by a bolt. When the connecting middle plate and the fixed bottom plate need to be connected, only by threadedly connecting the connecting bolt with the reinforcing ring, the connecting bolt will not move freely. After completing the connection of the connecting middle plate and the fixed bottom plate, the connecting bolt can be unscrewed downward from the reinforcing ring to complete the connection of the fixed reinforcing ring and the bolt.

Description

Technical Field

[0001] The present invention belongs to the technical field of connecting bolts, and particularly relates to a connecting bolt structure for strengthening lightweight materials. Background Art

[0002] The interior decoration is an important part of an aircraft. It not only has the functions of sound insulation and noise reduction, but also makes the cabin more beautiful, providing passengers with a comfortable flight experience. For aircraft interior decoration panels, in order to reduce the weight of the aircraft, lightweight composite material panels are used. Although this kind of lightweight composite material panel is very light in weight, it also results in too low strength of the composite material panel. In order to connect the composite material panel with other materials on the aircraft.

[0003] The usual installation methods are generally hanging, plugging and pasting, but the fixing effect obtained by this method is not good. During the long-term use of the aircraft, the phenomenon of falling off will occur; in order to have a firm fixing method, the currently adopted method is direct fixing with screws or the method of mutual cooperation of reinforcing rings and pins. For products such as interior decoration with high requirements for aesthetics, the exposure of screws will have a certain impact on the appearance, and directly fixing the screws will directly act the fixing force-bearing surface on the composite material panel with low strength. After a long time, it will damage the composite material panel, resulting in the falling off or damage of the composite material panel; although the assembly of the reinforcing ring and the pin can make the connection between the plates flush with each other, and there is also a reinforcing ring to strengthen the strength of the composite material panel, but this method is very troublesome in installation. In order to ensure that all the plates can be installed flatly with each other, the pins need to be pre-set in the reinforcing ring, and then inserted after all the plates are fitted together. However, in order to effectively strengthen the composite material panel and the strength of the connection between the plates with this cooperation method of the reinforcing ring and the pin, pins need to be used for fixing, and all the connection structures need to be densely arranged at the connection of the plates. The original installation method has no requirement for the placement of the pins in the reinforcing ring, and other pins to be installed may fall off during the installation of the pins, thus greatly increasing the operation difficulty of the connection installation. Summary of the Invention

[0004] The present invention belongs to a connecting bolt structure for strengthening lightweight materials, including a reinforcing ring and a connecting bolt. The reinforcing ring is arranged inside the lightweight upper plate, and the connecting bolt is arranged inside the reinforcing ring. A connecting middle plate is arranged below the lightweight upper plate, and a fixed bottom plate is arranged below the connecting middle plate. The bottom of the connecting bolt is arranged inside the fixed bottom plate. By using the form of the reinforcing ring and the bolt, while strengthening the lightweight plate, it also enables the connection between the lightweight plate and plates of other materials. And through the form of the bolt, the pin that would originally move freely in the reinforcing ring is changed to a threaded connection form that can be fixed by the bolt. When the connecting middle plate and the fixed bottom plate need to be connected, only by threading the connecting bolt with the reinforcing ring, the connecting bolt will not move freely. After completing the connection of the connecting middle plate and the fixed bottom plate, then unscrew the connecting bolt downward from the reinforcing ring to complete the connection of the fixed reinforcing ring and the bolt.

[0005] The shape of the reinforcing ring is annular, and a through hole is arranged in the center of the reinforcing ring. A bolt counterbore is arranged at the top of the through hole of the reinforcing ring, a threaded hole is arranged at the bottom of the through hole of the reinforcing ring, an installation ring groove is arranged in the middle of the outer side of the reinforcing ring, a disassembly hole is arranged at the upper edge of the installation ring groove, and an installation cutting edge is arranged at the lower edge of the installation ring groove. By using the reinforcing ring to strengthen the connection part of the lightweight upper plate, and through the stepped connection of the installation ring groove, the connection strength of the reinforcing ring to the lightweight upper plate is ensured. Moreover, the threaded hole at the bottom center of the reinforcing ring can be connected with the connecting bolt, so as to limit the stable suspension of the connecting bolt inside the reinforcing ring.

[0006] The connecting bolt is a flat-head bolt. Anti-slip strips are arranged on the outer side of the bolt head of the connecting bolt. A waist-shaped groove is arranged in the middle of the lower screw rod of the connecting bolt. A threaded head is arranged at the bottom of the lower screw rod of the connecting bolt. A torsion spring installation hole is arranged in the middle of the lower screw rod of the connecting bolt. The threaded head is matched with the threaded hole. The torsion spring installation hole is connected with the bottom of the lower screw rod of the connecting bolt through a curve guide groove. Through the anti-slip strips, the connecting bolt can be manually connected to the reinforcing ring through the thread without using a screwdriver. By arranging a torsion spring in the torsion spring installation hole, one end of the torsion spring is arranged inside the torsion spring installation hole, and the other end of the torsion spring is arranged at the bottom of the connecting middle plate, so as to fix the lightweight upper plate and the connecting middle plate by using the reinforcing ring and the connecting bolt.

[0007] Installation holes are arranged on the surface of the lightweight upper plate. Installation steps are arranged inside the installation holes. The installation steps are connected with the installation ring groove. The upper surface of the lightweight upper plate is flush with the upper surface of the reinforcing ring, and the lower surface of the lightweight upper plate is flush with the lower surface of the reinforcing ring. By installing the reinforcing ring inside the lightweight upper plate, the strength of the connection part of the lightweight upper plate can be strengthened, and the force of the bolt connection will not be completely applied to the surface of the lightweight upper plate due to only using a single bolt connection, thus preventing damage caused by long-term connection of the lightweight upper plate.

[0008] The surface of the connecting middle plate is provided with bolt through-holes, and the bolt through-holes are concentric with the mounting holes. The lower surface of the connecting middle plate is connected to the connecting bolt passing through the bolt through-hole by a torsion spring, and the torsion spring passes through and is arranged in the torsion spring mounting hole of the connecting bolt. Fixed bolts are arranged on both sides of the bolt through-hole, and the connecting middle plate is connected to the fixed bottom plate through the fixed bolts, and the connecting middle plate and the fixed bottom plate are connected flush through the fixed bolts.

[0009] The surface of the fixed bottom plate is provided with bolt slot holes, and the bolt slot holes are the same as the bolt through-holes. Through the bolt slot holes, the connecting bolts protruding from the bottom of the connecting middle plate are completely countersunk into the bolt slot holes, so as to ensure the complete flushness of the fixed bottom plate and the connecting middle plate.

[0010] Beneficial effects:

[0011] While strengthening the lightweight board by using the form of a reinforcing ring and bolts, it also enables the lightweight board to be connected to other material boards. And through the form of bolts, the pin that would originally move freely in the reinforcing ring is changed to a threaded connection form that can be fixed by bolts. When the connecting middle plate and the fixed bottom plate need to be connected, only by threadedly connecting the connecting bolt to the reinforcing ring, the connecting bolt will not move freely. After completing the connection of the connecting middle plate and the fixed bottom plate, then screw the connecting bolt downward from the reinforcing ring to complete the connection of the fixed reinforcing ring and bolts. By using the reinforcing ring to strengthen the connection part of the lightweight upper plate, and through the stepped connection of the installation ring groove to ensure the connection strength of the reinforcing ring to the lightweight upper plate. Moreover, the threaded hole at the bottom center of the reinforcing ring can be connected to the connecting bolt, so as to limit the connecting bolt to be stably suspended inside the reinforcing ring. Through the anti-slip strip, the connecting bolt can be manually connected to the reinforcing ring through the thread without using a screwdriver. By arranging a torsion spring in the torsion spring mounting hole, one end of the torsion spring is arranged inside the torsion spring mounting hole, and the other end of the torsion spring is arranged at the bottom of the connecting middle plate, so as to fix the lightweight upper plate and the connecting middle plate by using the reinforcing ring and the connecting bolt. Through the bolt slot holes, the connecting bolts protruding from the bottom of the connecting middle plate are completely countersunk into the bolt slot holes, so as to ensure the complete flushness of the fixed bottom plate and the connecting middle plate. Description of the drawings

[0012] Figure 1 is an assembly schematic diagram of a connecting bolt structure for strengthening lightweight materials;

[0013] Figure 2 is an assembly sectional view of a connecting bolt structure for strengthening lightweight materials;

[0014] Figure 3 is a schematic diagram of the upper side of the reinforcing ring of a connecting bolt structure for strengthening lightweight materials;

[0015] Figure 4Schematic diagram of the lower side of a reinforcing ring for a connecting bolt structure of a reinforced lightweight material

[0016] Figure 5 Schematic diagram of a connecting bolt for a connecting bolt structure of a reinforced lightweight material

[0017] In the figure: 1. Lightweight upper plate, 2. Connecting middle plate, 3. Fixed bottom plate, 4. Fixed bolt, 5. Reinforcing ring, 6. Connecting bolt Detailed implementation method

[0018] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention

[0019] Lightweight upper plate 1, connecting middle plate 2, fixed bottom plate 3, fixed bolt 4, reinforcing ring 5, connecting bolt 6

[0020] As Figure 1 、 2 shown

[0021] A connecting bolt structure for a reinforced lightweight material, including a reinforcing ring 5 and a connecting bolt 6. The reinforcing ring 5 is arranged inside the lightweight upper plate 1, and the connecting bolt 6 is arranged inside the reinforcing ring 5. The connecting middle plate 2 is arranged below the lightweight upper plate 1, the fixed bottom plate 3 is arranged below the connecting middle plate 2, and the bottom of the connecting bolt 6 is arranged inside the fixed bottom plate 3. The shape of the reinforcing ring 5 is annular, and a through hole is arranged in the center of the reinforcing ring 5. A bolt counterbore is arranged at the top of the through hole of the reinforcing ring 5, a threaded hole is arranged at the bottom of the through hole of the reinforcing ring 5, an installation ring groove is arranged in the middle of the outer side of the reinforcing ring 5, a disassembly hole is arranged at the upper edge of the installation ring groove, and an installation cutting edge is arranged at the lower edge of the installation ring groove. The connecting bolt 6 is a flat head bolt, an anti-slip strip is arranged on the outer side of the bolt head of the connecting bolt 6, a waist shrinking groove is arranged in the middle of the lower screw rod of the connecting bolt 6, a threaded head is arranged at the bottom of the lower screw rod of the connecting bolt 6, a torsion spring installation hole is arranged in the middle of the lower screw rod of the connecting bolt 6. The threaded head is matched with the threaded hole, and the torsion spring installation hole is connected to the bottom of the lower screw rod of the connecting bolt 6 through a curve guide groove. Installation holes are arranged on the surface of the lightweight upper plate 1, installation steps are arranged inside the installation holes, and the installation steps are connected to the installation ring groove. The upper surface of the lightweight upper plate 1 is flush with the upper surface of the reinforcing ring 5, and the lower surface of the lightweight upper plate 1 is flush with the lower surface of the reinforcing ring 5. Bolt through holes are arranged on the surface of the connecting middle plate 2, and the bolt through holes are concentric with the installation holes. The lower surface of the connecting middle plate 2 is connected to the connecting bolt 6 passing through the bolt through hole through a torsion spring. The torsion spring passes through and is arranged in the torsion spring installation hole of the connecting bolt 6. Fixed bolts 4 are arranged on both sides of the bolt through hole. The connecting middle plate 2 is connected to the fixed bottom plate 3 through the fixed bolts 4. Bolt slot holes are arranged on the surface of the fixed bottom plate 3, and the bolt slot holes are concentric with the bolt through holes

[0022] Embodiment example;

[0023] Before connecting the lightweight upper plate 1, the connecting middle plate 2 and the fixed bottom plate 3, first set a number of reinforcing rings 5 inside the lightweight upper plate 1, completely snap the reinforcing rings 5 into the mounting holes of the lightweight upper plate 1, use the connecting bolts 6 to be completely screwed into the reinforcing rings 5, sink the bolt heads of the connecting bolts 6 completely into the bolt countersunk holes of the reinforcing rings 5, install torsion springs in the torsion spring mounting holes in the connecting bolts 6, snap the torsion springs into the torsion spring mounting holes and the bottom of the connecting middle plate 2 to complete the connection between the lightweight upper plate 1 and the connecting middle plate 2. Before connecting the fixed bottom plate 3, first take out the connecting bolts 6 from the reinforcing rings 5 and rotate and fix them on the threaded holes, and then connect the connecting middle plate 2 and the fixed bottom plate 3. The connecting middle plate 2 connects the fixed bottom plate 3 through the fixing bolts 4. The bolt slot holes on the fixed bottom plate 3 are arranged below the connecting bolts 6. Then rotate and loosen the connecting bolts 6, place the connecting bolts 6 into the bolt slot holes, and sink the connecting bolts 6 completely into the reinforcing rings 5 to ensure that all joints are flush.

[0024] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A connecting bolt structure for strengthening lightweight materials, characterized in that, it includes a reinforcing ring and a connecting bolt. The reinforcing ring is arranged inside the lightweight upper plate. A connecting bolt is arranged inside the reinforcing ring. The shape of the reinforcing ring is annular, and a through hole is arranged at the center of the reinforcing ring. A connecting middle plate is arranged below the lightweight upper plate. Mounting holes are arranged on the surface of the lightweight upper plate. The upper surface of the lightweight upper plate is flush with the upper surface of the reinforcing ring. Bolt through holes are arranged on the surface of the connecting middle plate. A fixed bottom plate is arranged below the connecting middle plate. Bolt slot holes are arranged on the surface of the fixed bottom plate. The lower screw part at the bottom of the connecting bolt is arranged inside the bolt slot holes of the fixed bottom plate. The through hole, the bolt slot holes, the mounting holes and the bolt through holes are all concentric with each other. A bolt counterbore is arranged at the top of the through hole of the reinforcing ring, and a threaded hole is arranged at the bottom of the through hole of the reinforcing ring. A waist shrinking groove is arranged in the middle of the lower screw of the connecting bolt. A threaded head is arranged at the bottom of the lower screw of the connecting bolt. A torsion spring mounting hole is arranged in the middle of the lower screw of the connecting bolt. The threaded head is matched with the threaded hole. The torsion spring mounting hole is connected to the bottom of the lower screw of the connecting bolt through a curve guide groove. The lower surface of the connecting middle plate is connected to the connecting bolt passing through the bolt through hole through a torsion spring. The torsion spring passes through and is arranged inside the torsion spring mounting hole of the connecting bolt.

2. The connecting bolt structure for strengthening lightweight materials according to claim 1, characterized in that, a mounting ring groove is arranged in the middle of the outer side of the reinforcing ring. A dismounting hole is arranged on the upper edge of the mounting ring groove, and a mounting cutting edge is arranged on the lower edge of the mounting ring groove.

3. The connecting bolt structure for strengthening lightweight materials according to claim 1, characterized in that, the connecting bolt is a flat head bolt, and anti-slip strips are arranged on the outer side of the bolt head of the connecting bolt.

4. The connecting bolt structure for strengthening lightweight materials according to claim 1, characterized in that, a mounting step is arranged inside the mounting hole, and the mounting step is connected to the mounting ring groove.

5. The connecting bolt structure for strengthening lightweight materials according to claim 1, characterized in that, fixing bolts are arranged on both sides of the bolt through hole of the connecting middle plate, and the connecting middle plate is connected to the fixed bottom plate through the fixing bolts.

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