Title:
CORELESS MOTOR
Document Type and Number:
Japanese Patent JP2761175
Kind Code:
B2
Abstract:
PURPOSE: To prevent the deformation of a rotary shaft and to improve impact resistance by supporting the shaft by the thrust bearing of a field magnet and a plurality of radial bearings mounted in a cylindrical housing case.
CONSTITUTION: A rotary shaft 14 of a rotor having a cylindrical coil 1 supported by a support 2 is supported by a thrust bearing 110 of an upper end of a columnar field magnet 15 fixed to a bottom 61 of a cylindrical housing case 6 and a plurality of radial bearings 130, 140 disposed in space at an upper part 63 of the case 6. An eccentric counterbalance 10 is mounted at the shaft 14, a brush house 120 is inserted into a cutout of the case 6, fixed by a ring 21, and a brush 9 is brought into contact with a commutator 3. Thus, it can be reduced in size and weight, and even if the shaft 14 is reduced in diameter, stable durability and impact resistance can be obtained.
Inventors:
YASUDA TAKAFUMI
Application Number:
JP22762193A
Publication Date:
June 04, 1998
Filing Date:
September 13, 1993
Export Citation:
Assignee:
NAMIKI SEIMITSU HOSEKI KK
International Classes:
H02K7/075; H02K23/00; H02K23/58; (IPC1-7): H02K23/58; H02K7/075; H02K23/00
Domestic Patent References:
| JP6335215A | ||||
| JP6121506A | ||||
| JP723970U | ||||
| JP4108377U |
Attorney, Agent or Firm:
Toshio Nishizawa
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