Patent ID: 8727076

Claim:
A device for driving a door of an elevator, comprising: a door header mounted on a frame defining a doorway, the door header including a vertical portion substantially parallel to a plane of the doorway; a door movably supported on the frame; a driving motor disposed on the vertical portion of the door header, the driving motor comprising: a housing fixed with respect to the vertical portion; a first bearing mounted proximate the vertical portion; a second bearing mounted to the housing; a rotating shaft having an axis that is oriented substantially perpendicularly to the vertical portion, the rotating shaft being rotatably supported by the first bearing at one end thereof and being rotatably supported by the second bearing at the other end thereof; a driving pulley coupled to the rotating shaft; and a driving portion for driving the rotating shaft, the driving portion comprising: a stator portion supported by the vertical portion; and a rotor portion comprising: a disk portion with a central hole for reception of the rotating shaft; and a rim portion extending from an edge of the disk portion; wherein the vertical portion is located on a first side of the stator portion, and the disk portion is arranged on a second side of the stator portion with the rim portion extending towards the vertical portion and surrounding the stator portion circumferentially; wherein the first bearing is located between the vertical portion and the disk portion; wherein the disk portion is located between the first bearing and the second bearing; and wherein the driving pulley is located between the disk portion and the second bearing.