Planetary gear transmission systems or components – Electric or magnetic drive or control
Patent
1988-02-26
1990-05-29
Diehl, Dwight G.
Planetary gear transmission systems or components
Electric or magnetic drive or control
74640, 475904, 475179, F16H 132
Patent
active
049285564
ABSTRACT:
A robot arm drive apparatus of an industrial robot comprising: an electric motor having a drive shaft; a first robot member having the electric motor mounted thereon; a second robot member rotatably supported on the first robot member; and reduction gears for reducing rotation of the electric motor and then transmitting to the second robot member; the reduction gears comprising a planetary reduction gear and furthermore an additional reduction gear which is purposely provided so that the number of rotations of the electric motor, at which the resonance of a drive system comprising the electric motor, the second robot member and the reduction gear means occurs, is shifted from a predetermined operational region of the electric motor. The planetary reduction gear comprises an input shaft having a cam surface and connected with the additional reduction gear, an external gear, an internal gear held in mesh with the external gear and different in number of teeth from the external gear, the external gear being connected to the cam surface of the input shaft in such a manner that differential motion between the external gear and the internal gear is developed.
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Hashimoto Masataka
Iwata Michiyoshi
Matsumoto Kazuyuki
Diehl Dwight G.
Teijin Seiki Co. Ltd.
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