Composite roof header
Patent Information
- Application Number
- CN202522211744.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-16
AI Technical Summary
传统的车顶前横梁采用的是钣金冲压方案，采用焊接方案进行上下板之间的连接，但焊接方式需要在下板连接区域采用翻边结构，影响汽车内部的美感，需采用可见塑料装饰板进行遮丑，零件数量多，集成度低，产品质量大
[0009]与现有技术相比，本实用新型的优点在于将上板和下板采用CFRTP(连续纤维增强热塑性树脂)材料，材料密度(1.76g/cm3)比钢(7.85g/cm3)的密度更低，轻量化程度更高，并且取消了下板零件翻边结构和可见塑料装饰板零件，实现了无缝一体化美感的基础上，还减少了零件数量，集成度更高。
Smart Images
Figure CN224898941U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of automotive roof decoration parts, specifically relating to a composite material front crossbeam for a car roof. Background Technology
[0002] With the development of the new energy vehicle industry, people are increasingly pursuing lightweight design and aesthetic appeal in automobiles. Traditional roof crossbeams use sheet metal stamping and welding to connect the upper and lower panels. However, welding requires a flanged structure in the lower panel connection area, which affects the aesthetics of the car's interior. Visible plastic decorative panels are needed to cover up the unsightly parts. This results in a large number of parts, low integration, and high product weight. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a composite material front roof crossbeam that eliminates the visible plastic decoration and covering process of traditional roof crossbeams, achieves seamless integration, improves the product's lightweight and integration, and reduces production costs.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a composite material front crossbeam for a vehicle roof, characterized in that it includes an upper plate, a lower plate, and a reinforcing plate, wherein the upper plate and the lower plate are connected to each other to form a whole, the upper plate is molded from composite material, and the lower plate is injection molded from composite material and then embedded with a reinforcing plate.
[0005] In the aforementioned composite material roof front crossbeam, the lower plate is molded to form an inner weight-reducing cavity, and injection-molded ribs are injected onto the lower plate.
[0006] In the aforementioned composite roof front crossbeam, the upper and lower plates are made of continuous fiber reinforced thermoplastic resin material.
[0007] In the aforementioned composite roof front crossbeam, the upper plate and the lower plate have a connecting edge, and the connection between the upper plate and the lower plate is ultrasonic welding.
[0008] In the aforementioned composite material roof front crossbeam, rivets are spaced apart at the connecting edge, and the rivets connect the upper plate and the lower plate.
[0009] Compared with the prior art, the advantages of this utility model are that the upper and lower plates are made of CFRTP (continuous fiber reinforced thermoplastic resin) material, which has a lower density (1.76 g / cm3) than steel (7.85 g / cm3), resulting in a higher degree of lightweighting. Furthermore, the flange structure of the lower plate parts and the visible plastic decorative panel parts are eliminated, achieving a seamless integrated aesthetic while reducing the number of parts and increasing the degree of integration. Attached Figure Description
[0010] Figure 1 A schematic diagram of the overall structure of the front crossbeam of the composite material roof;
[0011] Figure 2 This is a schematic diagram of the front crossbeam of the composite roof from another direction.
[0012] Figure 3 for Figure 2 A schematic diagram of the AA-direction structure;
[0013] Figure 4 for Figure 2 A schematic diagram of the BB-oriented structure. Detailed Implementation
[0014] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0015] In the diagram, the upper plate is 100; the lower plate is 200; the reinforcing plate is 300; the inner weight-reducing cavity is 400; the injection-molded rib is 500; the rivet is 600; and the connecting edge is 700.
[0016] like Figure 1 and Figure 2 As shown, the composite roof front crossbeam includes an upper plate 100, a lower plate 200, and a reinforcing plate 300. The upper plate 100 and the lower plate 200 are connected to each other to form a whole. In this patent, the base material of the upper plate 100 and the lower plate 200 are both composite materials, which are continuous fiber reinforced thermoplastic resin materials, also known as CFRTP. This is because the density of CFRTP material (1.76 g / cm3) is lower than that of steel (7.85 g / cm3), which makes the entire composite roof front crossbeam more lightweight.
[0017] like Figure 3 as well as Figure 4As shown, the upper plate 100 is molded from composite material, and the lower plate 200 is injection molded from composite material with an embedded reinforcing plate 300. To ensure the overall strength of the lower plate 200, an embedded reinforcing plate 300 is required during its fabrication. The reinforcing plate 300 is made of metal. During the fabrication of the lower plate 200, the reinforcing plate 300 and the sheet metal are placed in the mold. After molding, injection molding is performed in the mold. To reduce the overall weight, an internal weight-reducing cavity 400 is molded into the lower plate 200. Injection ribs 500 are injection molded onto the lower plate 200. These injection ribs 500 can... To ensure the entire product is supported and does not deform, a connecting edge 700 is provided between the upper plate 100 and the lower plate 200 for reliable connection. The connection between the upper plate 100 and the lower plate 200 is ultrasonically welded. Rivets 600 are spaced apart at the connecting edge 700, connecting the upper plate 100 and the lower plate 200. The composite roof front crossbeam produced by the above steps has comparable performance to sheet metal parts, but the overall product weight is reduced by 25%, the tooling and mold costs are reduced by 30%, and the traditional visible plastic decoration is eliminated, achieving a seamless integrated aesthetic.
[0018] The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications to the described specific embodiments or adopt similar methods to replace them, but without departing from the scope defined by the spirit of this utility model.
Claims
1. A composite material front crossbeam for a vehicle roof, characterized in that, It includes an upper plate, a lower plate, and a reinforcing plate. The upper plate and the lower plate are connected to each other to form a whole. The upper plate is molded from composite material, and the lower plate is injection molded from composite material with an embedded reinforcing plate.
2. The composite roof front crossbeam according to claim 1, characterized in that, The lower plate is molded to create an inner weight-reducing cavity, and injection-molded ribs are injected onto the lower plate.
3. A composite roof front crossbeam according to claim 1 or 2, characterized in that, The upper and lower plates are made of continuous fiber reinforced thermoplastic resin.
4. A composite roof front crossbeam according to claim 1 or 2, characterized in that, The upper plate and the lower plate have a connecting edge, and the connection between the upper plate and the lower plate is ultrasonic welding.
5. A composite roof front crossbeam according to claim 4, characterized in that, Rivets are spaced apart at the connecting edge, and the rivets connect the upper plate and the lower plate.