Title:
PUMP DEVICE
Document Type and Number:
Japanese Patent JP2022183752
Kind Code:
A
Abstract:
To provide a pump device capable of preventing a drive magnet from being cracked while suppressing decentration of a rotor and the drive magnet.SOLUTION: In a pump device 1, a rotor 4 comprises: a seat part 42 supporting one end 81 of a cylindrical drive magnet 8; and a cylindrical part 40 extending from the seat part 42 along a rotation center axial line L. The cylindrical part 40 is fitted inside of the drive magnet 8. Ribs 46 extending along the rotation center axial line L are provided at a plurality of positions in a circumferential direction on an outer peripheral surface of the cylindrical part 40, and the drive magnet 8 is press-fitted into the cylindrical part 40 so as to be in contact with the ribs 46 at the plurality of positions from the outside in a radial direction. Therefore, a space between two ribs 46 which are adjacent to each other in the circumferential direction between the cylindrical part 40 and the drive magnet 8 becomes a gap G.SELECTED DRAWING: Figure 2
Inventors:
YAMAMOTO TAKESHI
YAZAWA TAKEHIKO
YAZAWA TAKEHIKO
Application Number:
JP2021091230A
Publication Date:
December 13, 2022
Filing Date:
May 31, 2021
Export Citation:
Assignee:
NIDEC SANKYO CORP
International Classes:
H02K7/14; F04D13/02; F04D29/58
Attorney, Agent or Firm:
Kawai Toru
Shin Kodaira
Nobuko Kawaguchi
Shin Kodaira
Nobuko Kawaguchi