| 摘要 |
PROBLEM TO BE SOLVED: To solve problems that an air gap cannot be made small because, when two cylindrical magnets are adhered and fixed side by side on a motor shaft, a clearance is required between a shaft and the magnets, an eccentricity occurs and the outer diameter of the magnet is changed, the adhesive protrudes from the joint and hardens in the outer diameter part. SOLUTION: Two adhesive grooves are provided on a plane of the motor shaft contacting the inside diameter of the cylindrical magnet, the magnets are respectively inserted from both sides of the shaft and a chamfer made in the inner diameter is placed at the center between the shaft grooves in order to make them match each other. Therefore, the shaft and the magnet are fitted at the part except for the grooves and the change of the outer diameter of the magnet is suppressed, the adhesive strength is kept in the grooves, leakage of the adhesive from a seam between the magnets is prevented and the brushless motor with a small air gap can be supplied. COPYRIGHT: (C)2003,JPO |
