Patent ID: 7757818
Filing Date: 2010-07-20
Classification: B66B,Y10S

Abstract:
1. An elevator installation with a car, which car is guided with a car guide rail, and with a counterweight in a shaft and having a drive unit, which drive unit drives the car and the counterweight by support and drive means, wherein the drive unit comprises: a drive shaft; a motor and a brake connected to said drive shaft; at least two support and drive device connected to the car and the counterweight; and at least two mutually spaced-apart drive zones wherein said at least two support and drive device are arranged in correspondence with a spacing of said at least two drive zones, said at least two drive zones being integrated into and directly machined in said drive shaft, whereby each of said at least two support and drive device engages an associated one of said at least two drive zones and said at least two support and drive device extend in the shaft on opposite sides of the car guide rail, and wherein said drive shaft is mounted by at least one central bearing, which said central bearing is arranged at right angles to an axis of the drive unit and acts in a plane of symmetry between said at least two drive zones, wherein said central bearing accepts support forces due to the support and drive device from the drive shaft along the plane of symmetry, and wherein an inner diameter of said central bearing is greater than an outer diameter of said at least two drive zones.