Title:
MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/251315
Kind Code:
A1
Abstract:
Provided is a motor with which vibrations can be reduced. This motor (100) includes: a shaft (1); a pair of bearings (41, 42); a sleeve (7) for accommodating the pair of bearings (41, 42); a magnet (21) that is secured to either one of the shaft (1) and the sleeve (7); a coil (32) that is secured to the other one of the shaft (1) and the sleeve (7), and that faces the magnet (21); and an elastic member (5) that is disposed in between the pair of bearings (41, 42) and that satisfies "numerical expression 1". D is the outer diameter [m] of the elastic member (5), d is the wire diameter φ [m] of the elastic member (5), γ is the unit volume weight [kg/m 3 of the material comprising the elastic member (5), S is the no-load rotation speed [rotations/min.] of the shaft (1), and g is the gravitational acceleration.
Inventors:
KEBUKAWA KOUJI (JP)
Application Number:
PCT/JP2021/021488
Publication Date:
December 16, 2021
Filing Date:
June 07, 2021
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
H02K5/24; F16C27/06; F16C27/08; F16C35/063; F16C35/12
Foreign References:
| JP2018145897A | 2018-09-20 | |||
| JPS6337863A | 1988-02-18 | |||
| JPS5422211U | 1979-02-14 |
Other References:
SIBATA, MASAMU ET AL.: "Correction of the Natural Frequency of a Linear Valve Spring", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS SERIES C, vol. 72, no. 720, 2006, pages 2608 - 2612
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (JP)
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