| 摘要 |
PROBLEM TO BE SOLVED: To reduce fluctuation in the magnetic pole pitch of a stator without tightening the dimension tolerance of a permanent magnet, in a cylindrical linear motor. SOLUTION: In the cylindrical shaft 12 which constitutes the outer shell of the stator of a cylindrical linear motor, a large number of the permanent magnets 13 are accommodated with S-poles and N-poles of the adjacent permanent magnets 13 mutually opposed with each other, holding a spacer member 18 for adjusting the magnetic pole pitch between. Then, in order to adjust the magnetic pole pitch (interval of the permanent magnets 13) of the stator 10, the spacer member 18 with a required thickness held between the respective permanent magnets 13 is selected from among a plurality of spacer members with different thickness prepared in advance. Thereby, fluctuations if any, in manufacturing found in the thickness of the permanent magnets can be absorbed by the adjustment of the thickness of the spacer member 18. COPYRIGHT: (C)2007,JPO&INPIT
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