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Piezoelectric motor

Imported: 23 Feb '17 | Published: 22 Oct '02

Alexander M. Iarochenko, V'Yacheslav V. Lavrinenko

USPTO - Utility Patents

Abstract

A piezoelectric motor having a stator and a rotor. The stator and the rotor are in mechanical contact with one another along at least one cylindrical friction surface by means of curved, elastic and longitudinally elongated pusher plates, the pusher plates being held against the friction surface at a first end of the pusher plates, and arranged at an angle to the friction surface. A piezoelectric element is connected to either the rotor or the stator. The piezoelectric element has electrodes placed on opposing surfaces of the piezoelectric element, and is connectable to an alternating current source via the electrodes for providing longitudinal oscillations in the piezoelectric element. A first ring plate and a second ring plate are arranged on opposite sides of the piezoelectric element, so that at least a portion of surfaces of the piezoelectric element are pressed against surfaces of the first ring plate and the second ring plate, respectively, by a clamping device. Longitudinal oscillations are thus transferred into the first ring plate and the second ring plate from the piezoelectric element, and at least one of the first ring plate and the second ring plate are in mechanical contact with second ends of the pusher plates.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

In order that the invention may be more clearly understood, the preferred embodiment thereof will now be described in detail by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a sectional side view of a piezoelectric motor according to a first embodiment of the invention, showing plates pressed against the piezoelectric element's surface,

FIG. 2 is a sectional side view of a piezoelectric motor according to a second embodiment of the invention, showing pushers anchored on the rotor in the shape of a barrel,

FIG. 3

a is a schematic diagram of a motor according to the invention, showing pushers anchored on the plate's internal cylindrical surface,

FIG. 3

b is a schematic diagram of a motor according to the invention, showing pushers set with one end against the plate's internal cylindrical surface,

FIG. 3

c is a schematic diagram of a motor according to the invention, showing L-shaped pushers,

FIG. 4

a is a schematic diagram of a piezoelectric element according to the invention, showing two plates pressed against the element with pushers anchored on the plates,

FIG. 4

b is a schematic diagram of a piezoelectric element with two plates pressed against it,

FIG. 5

a shows an alternative way of anchoring a pusher on the plate,

FIG. 5

b shows an alternative way of anchoring a plurality of pushers together on the plate,

FIG. 6

a shows a disk with deep slots,

FIG. 6

b shows a disk with medium depth slots,

FIG. 6

c shows a disc with shallow slots,

FIG. 7

a shows a piezoelectric element with electrodes on the flat surfaces of the element,

FIG. 7

b shows a piezoelectric element with electrodes on the cylindrical surfaces of the element, and

FIG. 8 shows a sectional side view of a third embodiment of a piezoelectric motor according to the invention, showing a motor of the so called converted type.

Claims

1. A piezoelectric motor comprising:

2. A piezoelectric motor according to claim 1, wherein said pusher plates are anchored on said first ring plate at said second end of said pusher plates.

3. A piezoelectric motor according to claim 1, wherein said pusher plates are anchored on said second ring plate at said second end of said pusher plates.

4. A piezoelectric motor according to claim 1, wherein a first set of said pusher plates are anchored on said first ring plate at said second end of said first set of pusher plates and a second set of said pusher plates are anchored on said second ring plate at said second end of said second set of pusher plates.

5. A piezoelectric motor according to claim 1, wherein said clamping device is sound-insulated from at least one of said first ring plate and said second ring plate by means of a soundproofing device.

6. A piezoelectric motor according to claim 5, wherein said soundproofing device is made of a soundproof material.

7. A piezoelectric motor according to claim 6, wherein said soundproofing device is made of rubber.

8. A piezoelectric motor according to claim 5, wherein said soundproofing device is made in the form of a thin-walled cylindrical membrane.

9. A piezoelectric motor according to claim 1, wherein said electrodes of said piezoelectric element are applied to flat surfaces of said piezoelectric element.

10. A piezoelectric motor according to claim 1, wherein said electrodes of said piezoelectric element are applied to cylindrical surfaces of said piezoelectric element.

11. A piezoelectric motor according to claim 1, wherein said rotor is in the shape of a barrel enclosed by said pusher plates.

12. A piezoelectric motor according to claim 1, wherein said rotor is in the shape of a cylinder enclosed by said pusher plates.

13. A piezoelectric motor according to claim 1, wherein said stator switches on said piezoelectric element.

14. A piezoelectric motor according to claim 1, wherein said rotor switches on the piezoelectric element.

15. A piezoelectric motor comprising:

16. A piezoelectric motor according to claim 15, wherein said clamping device is sound-insulated from at least one of said first ring plate and said second ring plate by means of a soundproofing device.

17. A piezoelectric motor according to claim 16, wherein said soundproofing device is made of a soundproof material.

18. A piezoelectric motor according to claim 17, wherein said soundproofing device is made of rubber.

19. A piezoelectric motor according to claim 16, wherein said soundproofing device is made in the form of a thin-walled cylindrical membrane.

20. A piezoelectric motor according to claim 15, wherein said electrodes of said piezoelectric element are applied to flat surfaces of said piezoelectric element.

21. A piezoelectric motor according to claim 15, wherein said electrodes of said piezoelectric element are applied to cylindrical surfaces of said piezoelectric element.

22. A piezoelectric motor according to claim 15, wherein said rotor is in the shape of a barrel enclosed by said pusher plates.

23. A piezoelectric motor according to claim 15, wherein said rotor is in the shape of a cylinder enclosed by said pusher plates.

24. A piezoelectric motor according to claim 15, wherein said stator switches on said piezoelectric element.

25. A piezoelectric motor according to claim 15, wherein said rotor switches on the piezoelectric element.