Laminated core and method for manufacturing the same

Details Laminated core and method for manufacturing the same Laminated core and method for manufacturing the same

2007-09-04

2010-12-07

Lam, Thanh (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S216004

Reexamination Certificate

active

07847466

ABSTRACT:
A laminated core (10) and a method for manufacturing the same, the laminated core (10) formed with a plurality of continuous segment core sheets (13) wound and laminated in a spiral form while connecting portions (12) mutually connecting the adjacent segment core sheets (13) are bent and side edges of the adjacent segment core sheets (13) are fitted with each other, the connecting portions (12) being located in an outer peripheral portion (11) of the laminated core (10), the laminated core (10) comprising:a concave cutout (19) provided at a radially outward side of the connecting portion (12), the concave cutout (19) allowing a radial bulge (18) to be accommodated within an outer circle of the laminated core (19), the radial bulge (18) formed at a radially outward side of the connecting portion (12) by bending the connecting portion (12); andan inward cutout (20) provided at a radially inward side of the connecting portion (12), the inward cutout (20) defining a bending position of the connecting portion (12), wherein the connecting portion (12) has a narrow radial width and, before being bent, has a radial width in the range of 0.5 to 5 times a thickness of the segment core sheet (13).The laminated core (10) and the method for manufacturing the same are capable of producing a highly-efficient and high-quality product that is free from effects of the swell in the thickness direction of the connecting portion (12).

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Japanese Office Action dated Apr. 13, 2010, issued in corresponding Japanese Patent Application No. 2006-280430.
Japanese Office Action dated Dec. 1, 2009, issued in corresponding Japanese Patent Application No. 2006-280430.

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