Arm drive device for industrial robot

Details Arm drive device for industrial robot Arm drive device for industrial robot

1997-09-30

1998-09-29

Martin, David S.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

901 2, 901 23, 901 28, G05B 1919

Patent

active

058149600

ABSTRACT:
An arm drive device for an industrial robot comprises a first arm rotatably supported on a supporting body, a second arm rotatably supported at the first arm and, a ball screw having a base portion adapted for rotatably supporting the end portion of a screw element which is rotatably supported at the supporting body. A nut portion is rotatably connected to a member for driving the first arm or the second arm, and a drive motor is provided for rotationally driving the ball screw. The drive motor is disposed at a position shifted but parallel to the center axis of ball screw, and the drive motor and ball screw are connected by a torque transmission means. Accordingly, resonance with frequency in the lower frequency region is prevented, thus making it possible to maintain a high level of locus accuracy of the robot arm.

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patent: 5282390 (1994-02-01), Torii et al.
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