Patent ID: 9528581
Filing Date: 2016-12-27
CPC Classification: F16H,Y10T

Claim Text:
1. A motor driven linear actuator, comprising: an electric motor including a rotor, a stator and a motor shaft having a first end portion and a second end portion, wherein the motor shaft is integrally formed with the rotor, the motor shaft is extended from the rotor in a horizontal direction, the rotor includes a plurality of permanent magnets, the first end portion of the motor shaft is exposed outside one side of the stator and the permanent magnets in the horizontal direction, the second end portion of the motor shaft is exposed outside the other side of the stator and the permanent magnets in the horizontal direction, and the first end portion of the motor shaft includes an end surface and a receptacle having a first accommodation space; a ballscrew device including a screw having a first end portion, wherein the first end portion of the screw includes a first section, the first end portion of the screw is coaxially connected to the first end portion of the motor shaft, the first section of the screw is accommodated in the first accommodation space of the motor shaft, and the first end portion of the screw is completely accommodated in the receptacle of the first end portion of the motor shaft for fixing the screw with the motor shaft; and a rolling bearing disposed between the electric motor and the ballscrew device and configured to rotatively support the first end portion of the screw, wherein the end surface of the first end portion of the motor shaft contacts and abuts against the rolling bearing along the horizontal direction for limiting the movement of the rolling bearing between the electric motor and the ballscrew device.