Composite floor structure

Abstract

A composite bottom plate structure is combined by independent buckle hand section bar and sandwich structure with interface requirement through glue rivet connection mode, the sandwich structure is integrally molded rectangular thin plate, the root is connected with the buckle hand, the end is provided with sealing strip, and nylon strip is arranged below the two sides of the sandwich structure; the sandwich structure is composed of upper skin, lower skin, filling layer, C-shaped beam and end embedded laminated plate, the lower skin is pasted to cover left and right vertical surfaces along the main fiber direction, the upper skin is overlapped on the folded lower skin, and the filling layer is arranged during layering. The utility model integrates the aluminum frame, interface structure, upper and lower aluminum plate skin and other scattered parts into integrally formed structure in the prior art, simplifies the structure, reduces the manufacturing process of the frame, cancels the rivet connection structure between the frames and between the sandwich and the panel. Compared with the existing aluminum honeycomb bottom plate technology, the utility model can reduce weight by more than 30%, and realizes the lightweight structure.

Description

Technical Field

[0001] This utility model relates to a composite plate structure, and more particularly to a bottom plate structure for the equipment compartment under a high-speed train. Background Technology

[0002] High-speed trains feature a streamlined equipment compartment beneath the vehicle to reduce air resistance during high-speed operation. The lower surface of the equipment compartment is composed of segmented floor plates. Currently, the widely used and mature floor plate technology for equipment compartments is an aluminum honeycomb structure. This structure uses aluminum honeycomb panels as interlayers, with aluminum plates of equal thickness bonded to the top and bottom. The main body is an aluminum honeycomb sandwich composite panel structure, with aluminum profiles sealing the edges. It also includes rubber strips for sealing with the surrounding structure. The floor plate is connected to the hoisting bracket via a floor plate lock or a pull-out slide. However, the aluminum profiles for the aluminum honeycomb floor plate's perimeter frame require pultrusion molding followed by machining, and then mechanical connection using rivets. This process involves numerous manufacturing steps, a large number of rivets, and low production efficiency. Furthermore, the aluminum alloy floor plate is heavy, making it increasingly difficult to meet the growing demand for lightweight rail vehicle structures. Utility Model Content

[0003] The present invention aims to develop a composite material base plate structure to solve the technical problems of existing aluminum honeycomb base plates, such as multiple manufacturing processes, low production efficiency, large amount of rivets used, and large structural weight, so as to better meet the application needs of EMU trains and improve the product quality of EMU trains.

[0004] To achieve the above-mentioned utility model objectives, this utility model designs a composite material base plate structure, which is composed of independent handle profiles and sandwich structure panels with interface requirements, connected by adhesive riveting. The sandwich structure is a rectangular thin plate integrally molded, with the handle connected at the root and a sealing strip at the end. Nylon strips are provided on the lower sides of the sandwich structure. The sandwich structure consists of an upper skin, a lower skin, a filling layer, a C-shaped beam, and end pre-embedded laminates. The lower skin is laid upward along the main fiber direction to cover the left and right facades. The upper skin overlaps the folded-back lower skin, and a filling layer is provided during the laying process.

[0005] The root of the sandwich structure is covered with a C-shaped beam, and the upper and lower skins are flatly overlapped on the flange of the C-shaped beam.

[0006] The ends of the sandwich structure are pre-embedded with laminated plates to form an integral frame, and a machining interface is reserved for the installation of sealing strips; the upper skin and the lower skin are flatly overlapped on the laminated plate.

[0007] Compared with the prior art, this utility model has the following advantages and advancements:

[0008] Simplified processes and improved production efficiency: The composite material base plate structure integrates the scattered parts such as aluminum frames, interface structures, and upper and lower aluminum sheet skins into a single molded structure, simplifying the structure, reducing the frame manufacturing process, and eliminating the riveting connections between frames and between frames and the mezzanine and panels. The overall layered design forms the frame boundary on all four sides and integrates the installation interfaces of auxiliary parts, avoiding multiple riveting connections. The simple structure and simplified processes improve production efficiency.

[0009] Lightweight: The composite material base plate is made of carbon fiber prepreg and aramid paper honeycomb, which can reduce the weight by more than 30% compared with the existing aluminum honeycomb base plate technology, thus achieving structural lightweighting and meeting the needs of future high-speed rail technology advancements. Attached Figure Description

[0010] Figure 1 A top view of the base plate provided by this utility model in one specific embodiment.

[0011] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0012] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0013] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure along the CC direction;

[0014] Figure 5 for Figure 1 Cross-sectional ply diagram of the sandwich structure in the BB direction (unmachined);

[0015] Figure 6 for Figure 1 A cross-sectional schematic diagram of the sandwich structure in the AA direction;

[0016] Figure 7 for Figure 1 Cross-sectional schematic diagram of the sandwich structure in the CC direction (unmachined). Detailed Implementation

[0017] The base plate of this utility model will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can accurately understand the technical solution of this utility model.

[0018] like Figure 1 As shown, the sandwich structure 1 is a rectangular thin plate integrally molded, with a handle 2 connected at the root and a sealing strip 4 at the end. Nylon strips 3 are installed on the lower sides of the sandwich structure. The sandwich structure 1 mainly consists of an upper skin 101, a lower skin 102, a filling layer 103, a C-shaped beam 104, and a laminate 105.

[0019] like Figure 2 As shown, the sandwich structure 1 and the handle 2 are connected by rivets.

[0020] like Figure 3 As shown, the sandwich structure 1 has pre-reserved installation interfaces for the nylon strip 3 on both sides by machining, and the two ends of the nylon strip 3 are fixed by rivets.

[0021] like Figure 4 As shown, the end of the sandwich structure 1 is machined to provide an installation interface for the sealing strip 4, and a metal plate is embedded in the dovetail of the sealing strip 4 to prevent it from falling out.

[0022] like Figure 5 As shown, the lower skin 102 of the sandwich structure 1 is laid upwards along the main fiber direction to cover the left and right facades, and the upper skin 101 overlaps the folded-back lower skin 102. In order to reserve an installation interface for the nylon strip 3, a filler layer is set during the layup.

[0023] like Figure 6 As shown, the C-shaped beam 104 laid at the root of the mezzanine structure 1 serves as a frame and connecting handle. The upper skin 101 and the lower skin 102 are flatly overlapped on the flange of the C-shaped beam 104, which has good laying processability.

[0024] like Figure 7 As shown, the end of the sandwich structure 1 is pre-embedded with a laminate 105 to form an integral frame, and a machining interface is reserved for the installation of the sealing strip 4. The upper skin 101 and the lower skin 102 are flatly overlapped on the laminate 105, which has good laying processability.

Claims

1. A composite material base plate structure, characterized in that: The independent handle (2) and the sandwich structure (1) with interface requirements are combined by adhesive riveting. The sandwich structure (1) is a rectangular thin plate integrally molded. The handle (2) is connected at the root and a sealing strip (4) is provided at the end. Nylon strips (3) are provided on the lower sides of the sandwich structure.

2. The composite material base plate structure according to claim 1, characterized in that: The sandwich structure (1) consists of an upper skin (101), a lower skin (102), and a C-beam (104). The lower skin (102) is laid up and covers the left and right facades along the main fiber direction, and the upper skin (101) overlaps the folded-back lower skin (102). The C-beam (104) is laid at the root of the sandwich structure (1), and the upper skin (101) and lower skin (102) are both flatly overlapped on the flange of the C-beam (104).

3. The composite material base plate structure according to claim 2, characterized in that: The end of the sandwich structure (1) is pre-embedded with a laminate plate (105) to form an overall frame, and a machining interface is reserved for the installation of the sealing strip (4); the upper skin (101) and the lower skin (102) are flatly overlapped on the laminate plate (105).

4. The composite material base plate structure according to claim 2, characterized in that: A filler layer (103) is provided during the tiling process.

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