CN-122009330-A - Novel carbon fiber composite material non-bearing chassis

CN122009330ACN 122009330 ACN122009330 ACN 122009330ACN-122009330-A

Abstract

The invention relates to a novel carbon fiber composite material non-bearing chassis, and belongs to the technical field of automobiles. The chassis mainly comprises a frame body made of carbon fiber composite materials, an independent suspension arranged in front of the frame and a rear leaf spring dependent suspension arranged behind the frame. The frame body is made of glass fiber felt, carbon fiber, unsaturated polyester resin and methyl ethyl ketone peroxide. The independent suspension realizes optimized layout through parts such as a lateral mounting frame body, a front suspension supporting beam, a thrust rod, a lower swing arm and the like, the rear suspension utilizes a specific front and rear lifting lug seat assembly to improve connection rigidity, and a special suspension bracket and a suspension pad are also designed between the frame and the vehicle body to block vibration transmission. Compared with the traditional metal chassis, the invention reduces the stress of the mounting point of the suspension by 10 percent on the basis of realizing great weight reduction and improving the fuel economy, improves the rigidity of the connecting part of the rear suspension by 20 percent, and can obviously reduce the vibration noise in the vehicle by 12dB.

Inventors

XIAO DONG
HAN SHUAI
CHEN WEI
HU XIAOQIANG
Zou Shaopan
LI RUI
LIU QIN
PENG SHUMING
GUO ZHIWEN
Dong Cien

Assignees

威驰腾(福建)汽车有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (7)

1. The novel carbon fiber composite material non-bearing chassis is characterized by comprising a frame body, an independent suspension arranged in front of the frame body and a rear leaf spring non-independent suspension arranged behind the frame body, wherein the frame body is prepared from a carbon fiber composite material; The independent suspension comprises two groups of lateral mounting frame bodies, a front suspension cross beam and a pillar connecting rod, wherein the two lateral mounting frame bodies are arranged on two sides of the front end of the frame body; The lateral mounting frame body comprises a front suspension support beam, a thrust rod, a lower swing arm, a front support and a front support, wherein the front support is connected to the side wall of the mounting frame body, an installation notch is formed in the outward side of the front support, the front support is installed in the installation notch and arranged downwards, the front suspension support beam is installed at the bottom of the frame body and located at the front end of the front support, an installation seat is arranged on the lower surface of the front suspension support beam, the lower swing arm is connected to the lower surface of the frame body and located below the front support, one end of the thrust rod is connected with the installation seat, the other end of the thrust rod is connected to the lower swing arm, the lower end of the front support is connected with the lower swing arm, the two front supports are connected through a support connecting rod, and the two front suspension support beams are connected through a front suspension cross beam.
2. The novel carbon fiber composite non-load-bearing chassis of claim 1, wherein the front support comprises a first top plate, two first side plates and a first back plate, the first top plate is connected to the upper end of the first back plate, the two first side plates are respectively connected to two sides of the first top plate and the first back plate, the first top plate, the two first side plates and the first back plate surround to form a mounting notch, and the first top plate is provided with a first mounting hole.
3. The novel carbon fiber composite non-load-bearing chassis of claim 1, wherein the front suspension support beam comprises a first bottom plate and a support plate, the first bottom plate is connected below the frame body, the first support plate is connected to the outer side of the first bottom plate and is connected with the side surface of the frame body, the mounting seat is provided with a shaft hole, one end of the thrust rod extends into the shaft hole, and the other end of the thrust rod is horizontally hinged with the lower swing arm.
4. The novel carbon fiber composite non-load-bearing chassis of claim 1, wherein the rear leaf spring non-independent suspension comprises two groups of rear mounting frames, the two groups of rear mounting frames are mounted on two sides of the rear end of the frame body, the rear mounting frames comprise rear suspension front lifting lug seat assemblies, rear suspension rear lifting lug assemblies and leaf spring suspensions, the rear suspension front lifting lug seat assemblies and the rear suspension rear lifting lug assemblies are arranged on the side face of the frame body at intervals, and two ends of the leaf spring suspensions are hinged with the rear suspension front lifting lug seat assemblies and the rear suspension rear lifting lug assemblies respectively through hinge plates arranged on two sides.
5. The novel carbon fiber composite non-load-bearing chassis of claim 1, wherein the frame body is connected with the bottom longitudinal beam by adopting a body suspension bracket and a connecting piece, the body suspension bracket is connected to one side of the frame body and comprises a second top plate, a second back plate and two second side plates, the second top plate is connected to the upper end of the second back plate, the two second side plates are respectively connected to the two sides of the second top plate and the second back plate, the connecting piece passes through the bottom longitudinal beam and the second top plate to be connected with a bolt, and a body suspension pad sleeved on the peripheral surface of the connecting piece is arranged between the bottom longitudinal beam and the second top plate.
6. The novel carbon fiber composite non-bearing chassis of claim 1, wherein the carbon fiber composite is composed of 30-35% of glass mat, 22-25% of carbon fiber, 40-45% of 994# pre-accelerated o-phenyl unsaturated polyester resin and 1-2% of BUTANOX-M-50 methyl ethyl ketone peroxide.
7. The novel non-load-bearing chassis of carbon fiber composite material of claim 6, wherein said frame body comprises a cross beam and a longitudinal beam, said cross beam and longitudinal beam being arranged in a matrix in a horizontal plane projection; The manufacturing process of the cross beam and the longitudinal beam is as follows: s1, connecting a die to a water temperature machine heating system; S2, the prepared carbon fiber composite material is sequentially paved on a die; s3, paving a layer of demolding cloth on the carbon fiber composite material, wherein the demolding cloth completely covers the carbon fiber composite material; s4, spreading a layer of flow guiding cloth on the demolding cloth, and spreading flow guiding pipes on the flow guiding cloth; s5, sticking a sealing adhesive tape around the paved material, wherein the sealing adhesive tape forms a closed loop; S6, paving a vacuum bag film on the demolding cloth, attaching the periphery of the bag film to the sealing rubber strip, and forming a sealing cavity for wrapping all paved materials with the mold; S7, installing a vacuum valve, a quick connector and a vacuum tube; s8, introducing the prepared vinyl resin until the resin completely infiltrates the carbon fiber composite material; S9, starting a water temperature machine heating system to wait for the solidification of the product.

Description

Novel carbon fiber composite material non-bearing chassis Technical Field The invention belongs to the technical field of frames, and particularly relates to a novel non-bearing chassis made of a carbon fiber composite material. Background In the automobile industry, along with the increasing requirements of environmental protection and energy saving, the weight reduction of automobiles has become an important development trend for improving fuel economy and reducing emission. The chassis is used as a core bearing component of the automobile, and the weight reduction of the chassis is important to the improvement of the performance of the whole automobile. The rigid frame of the traditional non-bearing chassis is mostly formed by welding or stamping steel materials and other metal materials. Although the metal material has better strength and rigidity, and can meet the mechanical performance requirement of the chassis as a whole vehicle supporting base, the metal material has larger self weight, so that the quality of the vehicle is increased, the further improvement of the fuel economy is directly limited, and the control flexibility of the vehicle is adversely affected. In recent years, a novel carbon fiber composite material represented by carbon fiber and glass fiber has been attracting attention in the field of weight reduction of automobiles because of its characteristics such as high specific strength, high specific modulus, excellent corrosion resistance and fatigue resistance. However, there are challenges in applying these materials to non-load-bearing chassis rigid frames that are required to carry complex alternating loads: 1. the structure integration is difficult, the non-bearing chassis is required to be provided with complex mechanisms such as an independent suspension or a leaf spring suspension, and the like, and the traditional connection mode of the metal frame is difficult to be directly transplanted to a carbon fiber composite material member. 2. The balance of performance and cost is difficult, and the rigidity requirement and the manufacturing efficiency are considered through reasonable material proportion and section design while the strength of the frame is ensured. 3. The manufacturing process is complex, the chassis components with large size and complex shape have extremely high requirements on the forming process, and if the traditional pressing process is adopted, the equipment cost is high and the yield is difficult to ensure. In view of this, the generation of the scheme is provided. Disclosure of Invention In view of the defects in the prior art, the technical problem to be solved by the invention is to provide a novel carbon fiber composite material non-bearing chassis which is lighter in weight and higher in strength. In order to solve the technical problems, the invention adopts the technical scheme that the novel carbon fiber composite material non-bearing chassis comprises a frame body, an independent suspension arranged in front of the frame body and a rear leaf spring non-independent suspension arranged behind the frame body, wherein the frame body is prepared from a carbon fiber composite material; the independent suspension comprises two groups of lateral mounting frame bodies, a front suspension cross beam and a pillar connecting rod, wherein the two lateral mounting frame bodies are arranged on two sides of the front end of the frame body; The lateral mounting frame body comprises a front suspension support beam, a thrust rod, a lower swing arm, a front support and a front support, wherein the front support is connected to the side wall of the mounting frame body, an installation notch is formed in the outward side of the front support, the front support is installed in the installation notch and arranged downwards, the front suspension support beam is installed at the bottom of the frame body and located at the front end of the front support, an installation seat is arranged on the lower surface of the front suspension support beam, the lower swing arm is connected to the lower surface of the frame body and located below the front support, one end of the thrust rod is connected with the installation seat, the other end of the thrust rod is connected to the lower swing arm, the lower end of the front support is connected with the lower swing arm, the two front supports are connected through a support connecting rod, and the two front suspension support beams are connected through a front suspension cross beam. Further, the front support comprises a first top plate, two first side plates and a first back plate, wherein the first top plate is connected to the upper end of the first back plate, the two first side plates are respectively connected to the two sides of the first top plate and the two sides of the first back plate, the first top plate, the two first side plates and the first back plate surround to form a mounting notch, and a first mounting hole is for