Device for supporting arm driving shafts of industrial robot

Details Device for supporting arm driving shafts of industrial robot Device for supporting arm driving shafts of industrial robot

1989-10-03

1991-03-12

Levy, Stuart S.

Bearings

Rotary bearing

Antifriction bearing

74479, 384571, 384584, 384585, 901 28, F16C 1936, B25J 1700

Patent

active

049988301

ABSTRACT:
In a device for supporting arm driving shafts, articulating portions of adjacently provided first and second arms constituting a parallel link type robot are rotatably supported, via separately provided bearings, from supporting posts projecting from the robot structure, and the first arm and second arm are also coupled through another bearing. All of these bearings are of a type in which an axial force applied to either one of inner and outer races of the bearing beforehand presses rolling members of the bearing toward the other of the races, while a pressing plate is provided for applying the axial force to one of the bearings. The application of the axial force shifts the supporting frame of the first arm relative to the driving shaft of the second arm, so that all of the bearings are prepressurized for eliminating unnecessary play.

REFERENCES:
patent: 3943803 (1976-03-01), Hafla
patent: 4627786 (1986-12-01), Minematsu et al.

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