US 12,362,685 B2Granted

Device and method for effecting rotational actuation

AssigneePhysik Instrumente (Pi) GmbH & Co. KG

InventorsDominik Bocskai, Harry Marth

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Abstract

The invention relates to a rotation actuating device, comprising a base, a rotor and at least two groups of drive units, each group comprising at least two drive units, wherein the drive units are arranged peripherally on the base and between the base and the rotor, wherein each drive unit comprises two deflectable actuators, which are arranged in a V-shape with respect to each other, and a friction element, which is connected to both actuators, and wherein the rotor and the friction elements are pressed in a direction toward each other by means of a spring device arranged between the drive units, such that, when the actuators are not deflected, all the friction elements are in contact with the rotor and jointly span a contact plane, wherein a continuous movement of the rotor is realized by means of phase-offset control of the actuators of different groups of drive units. The invention further relates to a method for operating the rotation actuating device.

Claims10

Dependent claims

A device for effecting rotational actuation, the rotational actuation device including

a base,
a rotor, and
at least two groups of drive units, each of the at least two groups of drive units comprising at least two drive units,
wherein the drive units of each of the at least two groups of drive units are arranged circumferentially on the base, between the base and the rotor, and each of the drive units comprises two deflectable actuators arranged in a V-shape with respect to one another and a friction element which is connected to the two deflectable actuators, and
wherein the rotor and the friction element of each of the drive units are pressed towards each other by means of a spring device which is arranged between the drive units such that, when the two deflectable actuators are not deflected, all the friction elements of each of the drive units are in contact with the rotor and jointly span a contact plane,
wherein a continuous movement of the rotor is realized by means of phase-offset actuation of the two deflectable actuators of different drive units of the at least two groups of drive units.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/765,823Filed 2 Oct 2020
Priority: DE 10 2019 126 702.12 Oct 2019
Published: US 2023/0063046 A12 Mar 2023
Granted: 15 Jul 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02N 2/103
Producing rotary motion, e.g. rotary motors: by pressing one or more vibrators against the rotor
H02N 2/0025
Using only longitudinal or radial modes: using combined longitudinal modes
H10N 30/702
Piezoelectric or electrostrictive devices: based on piezoelectric or electrostrictive fibres
H02N
Electric machines not otherwise provided for