Patent ID: 11939808
Assignee: ASSA ABLOY ENTRANCE SYSTEMS AB
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E

Claim 6:
7. A drive mechanism applied to an automatic door operator, the drive mechanism including a planetary reducer driven by an electric motor, and a drive shaft driven by the planetary reducer, wherein:
the planetary reducer includes a housing and a planetary gear train mounted in the housing;
the planetary gear train includes a final-stage planet carrier configured to output torque, and a center of the final-stage planet carrier is provided with a torque output hole; and
a first end of the drive shaft is detachably inserted in the torque output hole and is non-rotatably connected to the torque output hole, and a second end of the drive shaft extends out of the housing,
wherein the drive shaft is configured as a bevel gear shaft, a lead screw or a worm,
wherein at least one bearing is sleeved on the drive shaft, and the bearing is adjacent to the first end of the drive shaft and is supported by a bearing seat mounted to the housing, wherein the at least one bearing includes at least one pair of angular contact ball bearings disposed adjacent to each other,
wherein an inner surface of the bearing seat is provided with a first step configured to limit an outer ring of a first end of the bearing, and the bearing seat is screwed with an annular member configured to limit an outer ring of a second end of the bearing;
wherein the drive shaft is screwed with a nut, and a retaining ring is disposed between the nut and an inner ring of the first end of the bearing; and
wherein the drive shaft is provided with a shoulder configured to limit an inner ring of the second end of the bearing.