Vorrichtung zum Antrieb einer Schraubspindel durch Ultraschallschwingung

A mechanism for driving a screw rod by supersonic vibration

Dispositif pour actionner une broche à vis avec oscillateur ultrasonore

Abstract

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, is provided. A first screw rod rotation device (16a, 16a', 16d, 16d') is provided for rotation of a screw rod (2) in a first direction, and a second screw rod rotation device (16b, 16b', 16c, 16c') is provided for rotation of the screw rod (2) in a second direction. The first screw rod rotation device (16: 16a, 16a', 16d, 16d') includes a first vibrator (7) contacting a groove portion (12) of the screw rod (2) at a specific angle, a first spring (8) urging the first vibrator (7) toward the groove portion (12) of a screw rod (2) at a specific pressure and a first piezoelectric actuator (6) for vibrating the first vibrator (7) upon electrical activation. The second screw rod rotation device (16: 16b, 16b', 16c, 16c') includes a second vibrator (7) contacting a groove portion (12) of the screw rod (2) at a specific angle opposite that for rotation in the first direction, a second spring (8) urging the second vibrator (7) toward the groove portion (12) of the screw rod (2) at a specific pressure and a second piezoelectric actuator (6) for vibrating the second vibrator (7) upon electrical activation. The first and second screw rod rotation devices (16) are directly mounted on the work rack (5) which surrounds the screw rod and is slidable in the axial direction of the screw rod.

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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    CN-102843064-ADecember 26, 2012哈尔滨工业大学Flexible replaceable screw thread pair driving ultrasonic motor
    CN-103671867-AMarch 26, 2014舍弗勒技术股份两合公司Operating device
    CN-103671867-BAugust 08, 2017舍弗勒技术股份两合公司操纵装置
    US-6147435-ANovember 14, 2000Central Gikenkogyo CorporationMechanism for driving a screw rod by supersonic vibration