Title:
LAMINATED IRON CORE
Document Type and Number:
WIPO Patent Application WO/2020/053998
Kind Code:
A1
Abstract:
[Problem] To improve, in a laminated iron core having a large diameter core block and a small diameter core block, the bonding strength between the large diameter core block and the small diameter core block. [Solution] This laminated iron core 10 is configured by laminating: a large diameter core block 14 formed by laminating a plurality of first iron core thin plates 12 having a first outer diameter D1; and a small diameter core block 18 formed by laminating a plurality of second iron core thin plates 16 having a second outer diameter D2 that is smaller than the first outer diameter D1, wherein a recess part 28 is formed in a shoulder surface 14B formed on a small diameter core block 18-facing side of the large diameter core block 14 near the outer periphery of the small diameter core block 18, and a connection welding part 32 continuously extending in a laminate direction is provided from an outer peripheral surface 18A of the small diameter core block 18 to an inner surface 28A of the recess part 28 formed in the large diameter core block 14.
Inventors:
IMARU TOMOKAZU (JP)
Application Number:
PCT/JP2018/033870
Publication Date:
March 19, 2020
Filing Date:
September 12, 2018
Export Citation:
Assignee:
KURODA PRECISION IND LTD (JP)
International Classes:
H02K1/16; H02K1/18
Foreign References:
| JPH0257246U | 1990-04-25 | |||
| JP2016046866A | 2016-04-04 | |||
| JP2013031311A | 2013-02-07 | |||
| JP2012161126A | 2012-08-23 |
Attorney, Agent or Firm:
OSHIMA & PARTNERS (JP)
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