Carbon fiber composite material box type back frame

Abstract

A carbon fiber composite material box type back frame comprises a back frame bottom plate, the back frame bottom plate is a carbon fiber composite material laminated plate, a plurality of positioning counter bores are formed in the periphery and the middle of the bottom plate of the back frame bottom plate, clamping bases are arranged in the positioning counter bores, the upper end face of the back frame bottom plate is fixedly connected with a back frame frame, and the lower end face of the back frame bottom plate is fixedly connected with the back frame frame. The back frame is a carbon fiber composite material frame, a plurality of reinforcing supports are arranged on the periphery of the back frame, a plurality of positioning cylinders are arranged between every two reinforcing supports, multiple layers of one-way fiber cloth are arranged on the two sides of the back frame, the reinforcing supports on the back frame are installed in a clamping base, and the clamping base is installed on the back frame. A back frame upper cover plate is arranged above the back frame framework, the back frame upper cover plate is fixedly connected with the clamping base through a clamping pressing block, and the back frame upper cover plate is a carbon fiber composite material laminated plate. The box type back frame is good in bearing capacity and light in weight.

Description

Technical Field

[0001] The invention relates to the technical field of box-type back frames, and in particular to a box-type back frame made of carbon fiber composite material. Background Art

[0002] At present, the back frame is mostly made of steel pipe or aluminum alloy welding or toughened resin injection molding. The steel pipe and aluminum alloy welded back frame has good load-bearing capacity but is very heavy. For equipment with high requirements for structural rigidity and lightness, the large structural mass directly affects the mobility and transportability of the equipment. The use of toughened resin injection molding alone is only suitable for non-load-bearing or light-load-bearing occasions.

[0003] Carbon fiber composites are lightweight and have good load-bearing capacity, but are rarely used in large-size and large-load fields. Currently, there is no effective method for firmly connecting the connecting parts of carbon fiber composites and metal materials, nor is there an effective large-size and large-load carbon fiber composite box-type back frame structure.

[0004] Therefore, there is an urgent need for a lightweight and effective large-size and large-load box-type backpack. Summary of the invention

[0005] The purpose of the present invention is to provide a carbon fiber composite material box-type back frame in view of the corresponding deficiencies of the prior art. The box-type back frame has good load-bearing capacity and is light in weight.

[0006] The objective of the present invention is achieved by adopting the following scheme: a carbon fiber composite material box-type back frame, comprising a back frame bottom plate, the back frame bottom plate is a carbon fiber composite material laminate, a plurality of positioning countersunk holes are arranged around the bottom plate and in the middle of the bottom plate of the back frame bottom plate, a clamping base is arranged in the positioning countersunk holes, the upper end surface of the back frame bottom plate is connected and fixed to the back frame frame, the back frame frame is a carbon fiber composite material frame, a plurality of reinforcing supports are arranged around the frame of the back frame frame, a plurality of positioning cylinders are arranged between two reinforcing supports, multiple layers of unidirectional fiber cloth are arranged on both sides of the frame of the back frame frame, the reinforcing supports on the back frame frame are installed in the clamping base, a back frame upper cover plate is arranged above the back frame frame, the back frame upper cover plate is connected and fixed to the clamping base through a clamping block, and the back frame upper cover plate is a carbon fiber composite material laminate.

[0007] A mounting groove penetrating the clamping base is arranged in the middle of the clamping base, and the reinforcing support is mounted in the mounting groove.

[0008] The clamping base and the reinforcing support are a right-angle structure or an oblique-angle structure.

[0009] The layers of unidirectional fiber cloth arranged around the back frame are connected by gluing.

[0010] The clamping block is connected and fixed to the back frame upper cover plate and the clamping base by screws.

[0011] The back frame bottom plate is rectangular, the positioning countersunk holes are evenly arranged in a grid shape on the back frame bottom plate, and the back frame frame is a grid-shaped frame corresponding to the back frame bottom plate.

[0012] The clamping base, the clamping pressing block, and the reinforcing support and the positioning cylinder on the back frame are made of metal materials.

[0013] The advantages of the present invention are: 1. The present invention has a simple structure and is easy to install and manufacture; 2. The metal and carbon fiber composite material of the present invention adopts a mechanical clamping connection method and an uninterrupted fiber cloth laying method, which effectively solves the problem of fiber cloth stretching and falling off at the connection part, gives full play to the tensile strength of the fiber cloth, and adds a metal clamping base and a reinforcing support to further enhance the overall compressive strength; different clamping supports and reinforcing supports can realize box structures of different shapes, such as triangle, square, rectangle or diamond; 3. The box-type back frame of the present invention is made of carbon fiber composite material. For a large-sized box-type back frame structure, the weight of the back frame structure is reduced while ensuring the bearing capacity of the back frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the back frame structure of the present invention; Figure 3 It is a schematic diagram of the back frame bottom plate and the back frame structure of the present invention; Figure 4 Schematic diagram of the unidirectional fiber cloth structure. DETAILED DESCRIPTION

[0015] like Figures 1 to 4As shown, a carbon fiber composite box-type back frame includes a back frame bottom plate 1, the back frame bottom plate 1 is a carbon fiber composite laminate, a plurality of positioning countersunk holes 1-1 are arranged around the bottom plate and in the middle of the bottom plate of the back frame bottom plate 1, a clamping base 3 is arranged in the positioning countersunk holes 1-1, the upper end surface of the back frame bottom plate 1 is connected and fixed to a back frame frame 5, the back frame frame 5 is a carbon fiber composite frame, a plurality of reinforcing supports 2 are arranged around the frame of the back frame frame 5, a plurality of positioning cylinders 7 are arranged between two reinforcing supports, the back frame frame 5 adopts a mold tooling to determine the positions of the reinforcing supports 2 and the positioning cylinders 7, multiple layers of unidirectional fiber cloth 6 are arranged on both sides of the frame of the back frame frame 5, and the layers of unidirectional fiber cloth 6 arranged around the back frame frame 5 are connected by adhesive. The reinforcing support 2 on the back frame frame 5 is installed in the clamping base 3, and the back frame upper cover plate 8 is arranged above the back frame frame 5. The back frame upper cover plate 8 is connected and fixed to the clamping base 3 through the clamping block 4, and the clamping block 4 connects and fixes the back frame upper cover plate 8 to the clamping base 3 through screws. The back frame upper cover plate 8 is a carbon fiber composite laminate. The middle part of the clamping base 3 is provided with a mounting groove 3-1 that penetrates the clamping base 3, and the reinforcing support 2 is installed in the mounting groove 3-1. The clamping base 3 and the reinforcing support 2 are a right-angle structure or an oblique-angle structure. Each structural form includes a two-corner structure, a triangular structure and a four-corner structure. The reinforcing support 2 and the clamping base 3 of different structures are arranged around to form a triangular, square, rectangular and diamond-shaped box grid style. The back frame bottom plate 1 is rectangular, and the positioning countersunk holes 1-1 are evenly arranged in a grid shape on the back frame bottom plate 1. The back frame frame 5 is a grid-shaped frame corresponding to the back frame bottom plate 1. The clamping base 3, the clamping block 4, and the reinforcing support 2 and the positioning cylinder 7 on the back frame 5 are made of metal material.

[0016] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A carbon fiber composite box-type back frame, comprising a back frame bottom plate (1), characterized in that: The back frame bottom plate (1) is a carbon fiber composite laminate. A plurality of positioning countersunk holes (1-1) are arranged around the bottom plate and in the middle of the bottom plate of the back frame bottom plate (1). A clamping base (3) is arranged in the positioning countersunk holes (1-1). The upper end surface of the back frame bottom plate (1) is connected and fixed to a back frame frame (5). The back frame frame (5) is a carbon fiber composite frame. A plurality of reinforcing supports (2) are arranged around the back frame frame (5). A plurality of positioning cylinders (7) are arranged between two reinforcing supports. Multiple layers of unidirectional fiber cloth (6) are arranged on both sides of the back frame frame (5). The reinforcing supports (2) on the back frame frame (5) are installed in the clamping base (3). A back frame upper cover plate (8) is arranged above the back frame frame (5). The back frame upper cover plate (8) is connected and fixed to the clamping base (3) via a clamping block (4). The back frame upper cover plate (8) is a carbon fiber composite laminate.

2. The carbon fiber composite material box-type back frame according to claim 1, characterized in that: A mounting groove (3-1) penetrating the clamping base (3) is provided in the middle of the clamping base (3), and the reinforcing support (2) is mounted in the mounting groove (3-1).

3. The carbon fiber composite material box-type back frame according to claim 2, characterized in that: The clamping base (3) and the reinforcing support (2) are of a right-angle structure or an oblique-angle structure.

4. The carbon fiber composite material box-type back frame according to claim 1, characterized in that: The layers of unidirectional fiber cloth (6) arranged around the back frame (5) are connected by gluing.

5. The carbon fiber composite material box-type back frame according to claim 1, characterized in that: The clamping block (4) is connected and fixed to the back frame upper cover plate (8) and the clamping base (3) by means of screws.

6. The carbon fiber composite material box-type back frame according to claim 1, characterized in that: The back frame bottom plate (1) is rectangular, the positioning countersunk holes (1-1) are evenly arranged in a grid shape on the back frame bottom plate (1), and the back frame frame (5) is a grid-shaped frame corresponding to the back frame bottom plate (1).

7. The carbon fiber composite material box-type back frame according to claim 1, characterized in that: The clamping base (3), the clamping pressure block (4), and the reinforcing support (2) and the positioning cylinder (7) on the back frame (5) are made of metal material.

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