| 摘要 |
PURPOSE:To suppress the deformation and vibration of an enclosed case and reduce the generation of noise by fixing the stator of a motor and the bearing of a rotor with plural bolts and shrinkage fitting and fixing said bearing and its arm, said stator, etc., to said enclosed case. CONSTITUTION:Since the vibration which is generated in a cylinder 7 is transmitted to an enclosed case 2 via the bearing 12 of a rotor, the stator 11 of a motor, etc., the enclosed case 2 is deformed and vibrated, generating noise. In this case, plural holes 11a are provided on the stator 11 in the outer peripheral part position of a motor winding. Also, plural arms 12a are provided on the bearing 12 in positions corresponding to the holes 11a. And, the stator 11 and the bearing 12 are fixed via the fitting-in between the holes 11a and the arms 12a. And, further, the bearing 12, the arms 12a, and the stator 11 are shrinkage fitted and fixed to the closed case 2. Thereby, various deformation and vibration of the enclosed case 2 can be suppressed, effectively reducing noise generated by the deformation and vibration of the enclosed case 2.
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