METHOD OF AND APPARATUS FOR ASSEMBLING AN ELECTRIC MOTOR CAPABLE OF USING A MOTOR HOUSING HAVING LOW DIMENSIONAL PRECISION.

摘要

In assembling an electric motor used in the motor unit for a scroll compressor for an air conditioner, the gap between the stator (2) and the rotor (3) can be uniformly formed even when the dimensional precision of the motor housing (1) is low. The outside diameters of the bearings (5) and (6) are smaller than the inside diameter of the motor housing (1). In a first bearing assembling machine A, the center of the inner circumference of the stator (2) which is fixed in the motor housing (1), and the center of the bearing (5) are aligned. The bearing (5) is welded to the motor housing (1). The rotary shaft (5) to which the rotor (3) is fitted externally and fixed is inserted into the central part of the motor housing (1). In a second assembling machine C, the center of the bearing (5) is aligned with that of the bearing (6). The bearing (6) is welded to the motor housing (1), thus obtaining an electric motor having the stator (2), and bearings (5) and (6) whose centers are aligned with each other.