Piezoelectric drive device, robot, and method for driving piezoelectric drive device
US-2017001306-A1 · Jan 5, 2017 · US
Piezoelectric drive device and robot
US11888416B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11888416-B2 |
| Application number | US-202217722423-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 18, 2022 |
| Priority date | Apr 19, 2021 |
| Publication date | Jan 30, 2024 |
| Grant date | Jan 30, 2024 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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Abstract
Official abstract text for this publication.
A piezoelectric drive device includes two vibrators having vibrating portions with piezoelectric elements and transmitting portions placed in the vibrating portions and transmitting drive forces to a driven member (e.g. a slider), and a fixing portion having through holes (first through hole, second through hole) into which pins or screws are inserted. The two vibrators are placed adjoiningly along a drive direction of the slider, and the fixing portion is placed between the two vibrators and fixing the two vibrators.
First claim
Opening claim text (preview).
What is claimed is: 1. A piezoelectric drive device comprising: two vibrators having vibrating portions having piezoelectric elements and transmitting portions placed in the vibrating portions and transmitting drive forces to a driven member; and a fixing portion having a through hole into which a pin or a screw is inserted, wherein the two vibrators are placed next to each other along a drive direction of the driven member, and the fixing portion is placed between the two vibrators and fixing the two vibrators. 2. The piezoelectric drive device according to claim 1 , further comprising plate-like urging portions urging the two vibrators toward the driven member, wherein the urging portions and the two vibrators are superimposed in a direction perpendicular to the drive direction. 3. The piezoelectric drive device according to claim 2 , wherein the urging portions and the fixing portion are integrally formed. 4. The piezoelectric drive device according to claim 1 , wherein the driven member rotates around a rotation axis, and imaginary lines from the vibrating portions to the transmitting portions of the two vibrators incline toward the rotation axis side. 5. The piezoelectric drive device according to claim 1 , further comprising a spacer between the fixing portion and a head portion of the screw for fixing the fixing portion, wherein an inner diameter of the through hole is larger than an outer diameter of the head portion of the screw, and the spacer has a through hole having an inner diameter smaller than the outer diameter of the head portion of the screw. 6. A robot comprising the piezoelectric drive device according to claim 1 .
Assignees
Inventors
Classifications
- H02N2/103Primary
by pressing one or more vibrators against the rotor · CPC title
Rectangular vibrators · CPC title
Elastic elements, e.g. springs (in general F16F1/00) · CPC title
- H02N2/0015Primary
using only bending modes · CPC title
by pressing one or more vibrators against the driven body · CPC title
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- What does patent US11888416B2 cover?
- A piezoelectric drive device includes two vibrators having vibrating portions with piezoelectric elements and transmitting portions placed in the vibrating portions and transmitting drive forces to a driven member (e.g. a slider), and a fixing portion having through holes (first through hole, second through hole) into which pins or screws are inserted. The two vibrators are placed adjoiningly a…
- Who is the assignee on this patent?
- Seiko Epson Corp
- What technology area does this patent fall under?
- Primary CPC classification H02N2/103. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 30 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).