| 摘要 |
PROBLEM TO BE SOLVED: To provide a movable element for a cylinder-type linear motor which does not require machining, can be manufactured inexpensively, and moreover by which magnetic characteristics will not be lowered. SOLUTION: A movable element core is composed of a laminated yoke 29, constituted by laminating a plurality of electromagnetic steel sheets 33 in the axial line direction of first/second direct acting shafts 27A, 27B. A plurality of permanent magnets 31 fixed to the laminated yoke 29 are arranged so that the polarity appearing on the external surfaces of the two permanent magnets 31 facing each other via the laminated yoke 29 is different. The first/second direct acting shafts 27A, 27B are provided with a fixed part 27a and a pair of parts 27b, to be supported located on both sides in the axial line direction to the fixed part 27a. The first/second direct acting shafts 27A, 27B have smaller cross-sectional shape in a direction perpendicular to the axial line direction of the fixed part 27a than that in a direction perpendicular to the axial line direction of the part 27b to be supported. One electromagnetic steel sheet 33 is composed of two sheets of first/second divided electromagnetic steel sheet pieces having the same shape. COPYRIGHT: (C)2005,JPO&NCIPI
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