Mechanism for driving a screw rod by supersonic vibration

Details Mechanism for driving a screw rod by supersonic vibration Mechanism for driving a screw rod by supersonic vibration

1999-03-15

2000-11-14

Ramirez, Nestor

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310311, 310328, H02N 204, H02N 206

Patent

active

061474355

ABSTRACT:
In order to provide a mechanism for driving a screw rod by supersonic vibrations, which may achieve space savings, prevent back-lash of a work rack, and effect smooth operation, a first screw rod rotation device is provided for rotation of a screw rod in a first direction, and a second screw rod rotation device is provided for rotation of the screw rod in a second direction. The first screw rod rotation device includes a first vibrator contacting a groove portion of the screw rod at a specific angle, a first spring urging the first vibrator toward the groove portion of a screw rod at a specific pressure and a first piezoelectric actuator for vibrating the first vibrator upon electrical activation. The second screw rod rotation device includes a second vibrator contacting a groove portion of the screw rod at a specific angle opposite that for rotation in the first direction, a second spring urging the second vibrator toward the groove portion of the screw rod at a specific pressure and a second piezoelectric actuator for vibrating the second vibrator upon electrical activation. The first and second screw rod rotation devices are directly mounted on the work rack which surrounds the screw rod and is slidable in the axial direction of the screw rod.

REFERENCES:
patent: 4438364 (1984-03-01), Morison
patent: 4578607 (1986-03-01), Tojo et al.
patent: 4783610 (1988-11-01), Asano

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