Patent ID: 8388455
Filing Date: 2013-03-05
Classification: F16C,F16D

Abstract:
1. A telescopable steering spindle comprising: an inner spindle and an outer spindle disposed coaxially with respect to one another and having a cross section different from circular for torque transmission, and an interspace being provided between the inner spindle and the outer spindle; an antifriction bushing located in the interspace between the outer spindle and the inner spindle and having a sliding contact with at least one of the outer and the inner spindle, wherein the antifriction bushing consists of a mixture comprising the material PEEK and a PTFE material at a volume fraction in a range of 7% to 13%, a graphite material at a volume fraction in a range of 7% to 13%, and carbon fibers at a volume fraction in a range of 25% to 35%; and a lubricant having a dynamic viscosity in a range of 2000 mPa·sec to 4000 mPa·sec at a temperature of 25° C., in a range of 600 mPa·sec to 1200 mPa·sec at a temperature of 80° C., and in a range of 150,000 mPa·sec to 220,000 mPa·sec at a temperature of −20° C., the lubricant being disposed in sliding contact between the antifriction bushing and at least one of the outer spindle and the inner spindle.