# US 2023/0264347 A1 · Drive device and robot

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- Number: US 2023/0264347 A1
- Document ID: US20230264347A1
- Status: Published application
- Kind: A1
- Application number: 18/111,908
- Filed: 2023-02-21
- Published: 2023-08-24
- Earliest claimed: 2022-02-22
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Akiko KABUKI; Tomohisa IWAZAKI
- Web page: https://patentgrep.com/patent/US20230264347A1

## CPC

- B25J 9/12: electric
- B25J 9/044: {with forearm providing vertical linear movement}
- B25J: MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES ({manipulators specially adapted for use in surgery A61B34/70; manipulators used in cleaning hollow articles B08B9/04}; manipulators associated with rolling mills B21B39/20; manipulators associated with forging machines B21J13/10; {manipulators associated with picking-up and placing mechanisms B23P19/007}; means for holding wheels or parts thereof B60B30/00; {vehicles with ground-engaging propulsion means, e.g. walking members B62D57/02, B62D57/032; devices for picking-up and depositing articles or materials between conveyors B65G47/90, B65G47/91; manipulators with gripping or holding means for transferring packages B65H67/065}; cranes B66C; {manipulators used in the protection or supervision of pipe-line installations F17D5/00; walking equipment adapted for nuclear steam-generators F22B37/006}; manipulators specially adapted for, or associated with, nuclear reactors G21C; {apparatus used for handling wafers during manufacture or treatment of semiconductor H10P72/50})

## Abstract

A drive device includes a vibrator, and a rotor as a driven unit subjected to a drive force from the vibrator and relatively rotating or moving to the vibrator, wherein the rotor as the driven unit has a base portion and an elastic portion coupled to the base portion, and the base portion is located between the vibrator and the elastic portion.

## Claims

### Claim 1

A drive device comprising:
a vibrator; and
a driven unit subjected to a drive force from the vibrator and relatively rotating or moving to the vibrator, wherein
the driven unit has a base portion and an elastic portion coupled to the base portion, and
the base portion is located between the vibrator and the elastic portion.

### Claim 2 (depends on 1)

The drive device according to claim 1, further comprising a weight portion, wherein
the weight portion is placed at an opposite side to the base portion with respect to the elastic portion.

### Claim 3 (depends on 2)

The drive device according to claim 2, wherein
a Young's modulus of the weight portion is higher than a Young's modulus of the elastic portion.

### Claim 4 (depends on 2)

The drive device according to claim 2, wherein
the elastic portion and the weight portion are fixed by a bolt.

### Claim 5 (depends on 1)

The drive device according to claim 1, wherein
the vibrator and the elastic portion overlap in a plan view in a direction in which the vibrator and the base portion are arranged.

### Claim 6 (depends on 1)

The drive device according to claim 1, wherein
the driven unit is a rotor rotating around a rotation axis, and
a direction in which the vibrator and the base portion are arranged is along the rotation axis.

### Claim 7 (depends on 1)

The drive device according to claim 1, wherein
the driven unit is a rotor rotating around a rotation axis, and
the elastic portion is placed on a side surface of the rotor.

### Claim 8 (depends on 1)

The drive device according to claim 1, further comprising a guiding portion guiding the driven unit in linear directions.

### Claim 9 (depends on 1)

A robot comprising:
the drive device according to claim 1;
an arm portion; and
a drive unit driving the arm portion, wherein
the drive device is provided in the drive unit.