Patent ID: 7047833
Filing Date: 2006-05-23
Classification: F16H,H02K,Y10T

Abstract:
1. A feed unit comprising a rod-type actuating element that is arranged in a housing ( 2 ) and guided for axial displacement relative to the housing ( 2 ), the feed unit further comprising a drive motor ( 4 ) that effects the displacement of the actuating element through a driving device that is rotatably retained in bearings in the housing ( 2 ), said driving device comprising a threaded spindle ( 1 )) and a spindle nut ( 3 ) surrounding the threaded spindle, the drive motor ( 4 ) with its stator ( 5 ) and rotor ( 6 ) being arranged in the housing ( 2 ), and the spindle nut ( 3 ) being coaxially arranged in and fixed to a hollow shaft ( 7 ) that is surrounded by and fixed to the rotor ( 6 ), the hollow shaft ( 7 ) being rotatably mounted in a fixed bearing ( 8 ) in the region of the spindle nut ( 3 ) and in a movable bearing ( 12 ) in an end region of the housing ( 2 ), characterized in that the fixed bearing ( 8 ) is configured as an angular contact thrust ball bearing and is axially supported in the region of an articulated axle ( 9 ) for the housing ( 2 ) that extends through the center of gravity of the feed unit.