Adjusting device

An adjusting device for adjusting two parts relative to each other, the device comprising:

• a sleeve-like housing having a cylindrical inner wall and an end opening, the housing being fixed against rotation the cylindrical inner wall having a helical groove;
• an adjusting component guided through the end opening of the sleeve-like housing and fixed against rotation with respect to the sleeve-like housing;
• a rotary drive mounted in the adjusting component and having a drive shaft, the drive shaft being coaxial with the sleeve-like housing and having a helical groove;
• and
• a recirculating ball mechanism comprising a plurality of balls disposed between the helical grooves of the sleeve-like housing and the drive shaft,
• wherein the rotary drive is operable to move the adjusting component axially relative to the sleeve-like housing via the recirculating ball mechanism when the drive shaft is rotated.

An adjusting device for adjusting two parts relative to each other, the device comprising:

• a sleeve-like housing having a cylindrical inner wall with a longitudinal axis and an end opening, the cylindrical inner wall having a thread;
• an adjusting component guided through the end opening of the sleeve-like housing and fixed against rotation with respect to the sleeve-like housing, the adjusting component having a first end disposed outside the sleeve-like housing, and a second end disposed inside the sleeve-like housing;
• a rotary drive mounted in the adjusting component and having a drive shaft coaxial with the sleeve-like housing;
• and
• a planetary roller mechanism comprising a plurality of spindles parallel to the longitudinal axis and a plurality of planetary rollers mounted for rotation on respective said spindles, each said spindle being fixed with respect to the drive shaft, each of the planetary rollers having a groove engaging the thread on the cylindrical inner wall of the sleeve-like housing,
• wherein the rotary drive can move the adjusting component axially relative to the sleeve-like housing by rotating the drive shaft when the sleeve-like housing is fixed against rotation.