Rotary motor having a rotation unit configured to make an elastic deformation

Patent metadata

Field	Value
Publication number	US-11533004-B2
Application number	US-202016953271-A
Country	US
Kind code	B2
Filing date	Nov 19, 2020
Priority date	Jun 19, 2020
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

The present disclosure provides a rotary motor, which includes: a clamping member having a gripping unit installed at an inner circumference of a rotor to grip the rotor during a predetermined time; and a driving member installed at the inner circumference of the rotor and having a rotation unit configured to make an elastic deformation to rotate by a predetermined angle and then return to an original state so that the rotor is rotated.

First claim

The invention claimed is:

1. A rotary motor, comprising:
a clamping member having a gripping unit installed at an inner circumference of a rotor to grip the rotor during a predetermined time; and
a driving member installed at the inner circumference of the rotor and having a rotation unit configured to make an elastic deformation to rotate by a predetermined angle and then return to an original state so that the rotor is rotated.

2. The rotary motor according to claim 1 ,
wherein there are provided two clamping members, and the two clamping members are disposed at both sides with the driving member being interposed therebetween.

3. The rotary motor according to claim 2 ,
wherein the clamping member further includes a piezoelectric unit configured to elastically deform in one direction, and when the piezoelectric unit makes a tensile strain, the gripping unit grips the inner circumference of the rotor.

4. The rotary motor according to claim 3 ,
wherein the clamping member further includes:
a coupling unit configured to support both ends of the piezoelectric unit; and
a transmission unit connected to the coupling unit to transmit a stress to the gripping unit in a direction intersecting with the one direction.

5. The rotary motor according to claim 2 ,
wherein the two clamping members are disposed in a state of being rotated by the predetermined angle based on a rotary shaft around which the rotor rotates.

6. The rotary motor according to claim 5 ,
wherein one of the clamping members is connected to the rotation unit to rotate together with the rotation unit, so that the rotor is rotated.

7. The rotary motor according to claim 1 ,
wherein the driving member further includes two piezoelectric units configured to elastically deform in one direction and provided at one diagonal locations of the driving member, and
when the two clamping members make a tensile strain, the rotation unit is rotated by the predetermined angle, and when the two clamping members return to an initial state, the rotation unit returns to the original state.

8. The rotary motor according to claim 7 ,
wherein the driving member further includes:
a support unit configured to support both ends of the piezoelectric unit and connected to the rotation unit to rotate the rotation unit in a state where the piezoelectric unit makes a tensile strain; and
a connection hole formed in the rotation unit so that the rotation unit is connected to rotate together with the clamping member.

9. The rotary motor according to claim 8 ,
wherein the driving member further includes two maintaining units provided at the other diagonal locations of the driving member to elastically support the rotation unit.

Assignees

• Korea Inst Sci & Tech

Inventors

• Hwang Donghyun
• Lim Byeongkyu

Classifications

• H02N2/12

  Constructional details · CPC title

• H02N2/101 Primary

  using intermittent driving, e.g. step motors · CPC title

• H02N2/123 Primary

  Mechanical transmission means, e.g. for gearing · CPC title

• H02N2/043

  Mechanical transmission means, e.g. for stroke amplification · CPC title

• H02N2/103 Primary

  by pressing one or more vibrators against the rotor · CPC title