Driver Seat Lumbar Support Adjustments System Design Based on Ergonomics Principles

摘要

As a typical man-machine interface, vehicle driver seat directly affects driver seating and riding comfort. Lumbar support of driver seat plays a particularly important role in improving driver seating and riding comfort and is usually realized by installing adjustable lumbar support, which provides stable, comfortable support for drivers with different body sizes. Traditional lumbar support has several shortcomings, such as complex structure, high cost, insufficient adjustments ranges, etc. In this work, forward design method of lumbar support with adequate design confidence level was developed, with four-way electric adjustments system. Firstly, lumbar support adjustments ranges were analyzed according to ergonomic principles. Then the concept of lumbar support adjustments mechanism was designed and the parameters of adjustments mechanism were determined including the length and angle ranges of parts, motor and spring parameters, etc. Finally, with consideration of product processing technology and manufacturing cost requirements, detailed lumbar support adjustments system structure was determined. The validated system structure parts were produced and assembled into a prototype. The prototype was tested and accepted, which showed that not only the lumbar support system met the design requirements well, but also the forward design method presented was scientific and reasonable.