Device for adjusting height of body of motor car, has spring strut arranged at wheel carrier, and nut moved along spindle, where spindle and nut are made of plastic and comprise friction-improving surface coating i.e. PTFE coating

摘要

The device (1) has a spring strut arranged at a wheel carrier and provided with a spring (5) that is tensioned between an upper spring plate (4) and a lower spring plate. The upper spring plate or an upper support plate (3) is axially adjustable by a motor-driven linear guiding unit that is designed as a spindle-nut drive (6). A spindle (7) and a nut (8) are made of plastic and comprise a friction-improving surface coating i.e. PTFE coating. The plastic exhibits dynamic friction coefficient of about lesser than 0.20. The nut is moved along the spindle using the upper spring plate.