The seat rail is one of the most important parts in the seat assembly. It has a very high technical content and patent protection. It is not only an important function, but also one of the car safety parts. The seat slide rail and the manual lock device can realize the manual adjustment of the seat in the horizontal position. The motor and the drive mechanism can realize the automatic adjustment of the seat in the horizontal position, and the market application is very broad. In the seat safety performance index, the seat rail needs to withstand a static pulling force of 24kN or more, and it is necessary to ensure that the sliding rail is balanced when subjected to forces in all directions such as positive pressure and side pulling, and functional failure cannot be generated. This puts very high requirements on the design of the cross-sectional shape of the slide rail and the raw material of the slide rail itself. It is necessary to design the slide rail section scientifically and reasonably. In particular, the material of the slide rail itself needs to have a tensile strength of more than 600 MPa, while the steel of the domestic enterprise still Can not meet the high tensile strength of raw materials.
Another technical difficulty of the seat slide is the slide rail manufacturing technology, which requires the production enterprise to have very high-sized large-scale precision molds and punching machines, and the domestic research in this area is relatively backward from the foreign technology and cannot meet the design requirements of the product. In foreign countries, the main market for seat slides is controlled by companies such as Brose and Faurecia. It is the designated supplier of many OEMs, and its product technology has the advantages of compact structure and high tensile strength. Future seat rails will develop in the direction of light weight, high strength, integration and platform.
The domestic production of seat slide manufacturers mainly include Shanghai Mingfang Auto Parts Co., Ltd. and Hubei Zhonghang Precision Machinery Technology Co., Ltd., and the market is low-end vehicles, and its technology can not meet the safety and performance required by mid- to high-end vehicles. And other specifications. Ningbo Shuanglin Auto Parts Co., Ltd. is developing a universal seat slide and realizing the unification of the hand and electric slide platform. It has applied for a patent. Its design is shortening the gap compared with foreign seat rail manufacturers such as Brose and Faurecia.
