Title:
ULTRASOUND MOTOR AND MEASUREMENT DEVICE
Document Type and Number:
Japanese Patent JP2020048408
Kind Code:
A
Abstract:
To provide an ultrasound motor and a measurement device comprising the ultrasound motor, the ultrasound motor having an output shaft and a rotation shaft directly connected to each other, the ultrasound motor removing influence of eccentricity between the output shaft and the rotation shaft.SOLUTION: An ultrasound motor 14 has an output shaft 22 connected to a rotation shaft 17, stators 27, 32 rotatably provided to the output shaft, a rotor 23 fastened to the rotation shaft, and a vibration generation part 25 for generating ultrasound vibration that causes the rotor and the stators to relatively rotate. Between the stator and a fixed side 11 supporting the rotation shaft, a rotation stop unit 45 is provided. The rotation stop unit includes a joint holder 47 provided on the fixed side, a ball holder provided on the joint holder, and a connector provided on the stator. The connector is tiltably held between the ball holder and a base to restrict the connector's displacement in a rotation direction. A radial displacement between the joint holder and the connector is made to be absorbed by tilting of a connection pin.SELECTED DRAWING: Figure 2
Inventors:
TOKUDA YOSHIHIKO
NAKAMURA SATOSHI
OKUDAIRA YOSUKE
NAKAMURA SATOSHI
OKUDAIRA YOSUKE
Application Number:
JP2019211142A
Publication Date:
March 26, 2020
Filing Date:
November 22, 2019
Export Citation:
Assignee:
TOPCON CORP
International Classes:
H02N2/12; G01C15/00
Domestic Patent References:
| JPH11311517A | 1999-11-09 | |||
| JPH11230749A | 1999-08-27 | |||
| JP2014137299A | 2014-07-28 | |||
| JP2007170547A | 2007-07-05 |
Foreign References:
| US20100247087A1 | 2010-09-30 |
Attorney, Agent or Firm:
Shoji Miyoshi