Rotary drive for rotary shaft, has needle bearing rollers arranged between positions of spiral winding of metal band parallel to rotary shaft, where outer end of spiral winding of metal band is fastened to housing component

摘要

The drive (1) has a metal band (4) provided with preset heat-expansion coefficients and spirally wound around a rotary shaft (2) on partial length of the rotary shaft. The rotary shaft wound with the band is arranged within a housing component (5). An inner end of spiral winding of the band eccentrically to a rotary axis (3) of the shaft is fastened to the rotary shaft. An outer end of the spiral winding of the band is fastened to a housing component. A set of needle bearing rollers (8) is arranged between positions of the spiral winding parallel to the shaft.