Structure for connecting a rotary detecting device to a rotary s

Details Structure for connecting a rotary detecting device to a rotary s Structure for connecting a rotary detecting device to a rotary s

1989-08-29

1990-10-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33707, G01D 534

Patent

active

049637320

ABSTRACT:
A structure for providing relative positioning of a rotary detecting shaft of a rotary detecting device, such as a rotary encoder or a rotary switch, and a rotary shaft, is disclosed. There is an X-Y stage comprised of a plate, a first sliding plate and a second sliding plate. The rotary detecting device is fastened to the second sliding plate of the X-Y stage, and the plate is fastened to a frame to which the rotary shaft is mounted. The rotary detecting shaft is connected to the rotary shaft by a joint unit. According to the invention, aligning the rotary shaft with a rotary detecting shaft is carried out automatically by the movement of the first and second sliding plates as the rotary detecting shaft and rotary shaft are connected. Further, if exact alignment is not achieved prior to rotation of the rotary shaft, the rotational deviation of the rotary detecting shaft and rotary shaft will be eliminated by the further movement of the X-Y stage. This results in reduced rotational torque on the rotary detecting shaft and, therefore, reduced damage to bearings and other parts, and increased accuracy of detection.

REFERENCES:
patent: 4427882 (1984-01-01), Nakaoki et al.
patent: 4530159 (1985-07-01), Ernst
patent: 4605853 (1986-08-01), Kumada et al.

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