MAGNETIC MODULATION GEAR AND GEAR MOTOR

WIPO Patent Application WO/2023/022006

A1

Provided are a magnetic modulation gear and a gear motor capable of suppressing decreases in torque and efficiency caused by leakage flux. A magnetic modulation gear (30) includes: a plurality of outer pole magnets (33) arranged in a circumferential direction; a rotor (32) including a plurality of magnetic pole pieces (32a) arranged in the circumferential direction and further inward in the radial direction than the plurality of outer pole magnets; and a plurality of inner pole magnets (31a) arranged in the circumferential direction and further inward in the radial direction than the plurality of magnetic pole pieces. Moreover, one or multiple bearings (13a, 13c, 13d) are provided that support the rotor so as to be relatively rotatable with respect to the outer pole magnets or the inner pole magnets. The one or multiple bearings include one-side bearings (13a, 13c) positioned more to one side in the axial direction than the plurality of magnetic pole pieces. A first bearing (13c), of the one-side bearings, that is closest to the magnetic pole pieces, is disposed in a region further outward in the radial direction than an inner circumference edge of the plurality of outer pole magnets, or in a region further inward in the radial direction than an outer circumference edge of the plurality of inner pole magnets.

NAKAGAWA HIROKI (JP)
YAMAMOTO TAIZO (JP)
MINARI TAKAHIRO (JP)

PCT/JP2022/029936

February 23, 2023

August 04, 2022

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SUMITOMO HEAVY INDUSTRIES (JP)

F16H49/00; H02K7/10

JP2016142407A	2016-08-08
JP2013011298A	2013-01-17
JP2017050943A	2017-03-09
JP2012147513A	2012-08-02
US20170373582A1	2017-12-28
JP2020133790A	2020-08-31

ARAFUNE, Hiroshi et al. (JP)

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