Electrical machine with preloaded ball race and method for manufacturing the same
A technology of ball bearings and pre-tightening, applied in the direction of ball bearings, rotating bearings, bearings, etc., can solve the problems of reduced service life of rotor bearings, and achieve the effects of avoiding noise, increasing service life, and improving flexibility or bending characteristics
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[0019] Fig. 1 shows a cross-sectional view of a motor according to a first embodiment of the present invention.
[0020] The motor 1 shown has a stator assembly, which is mainly composed of a stator group 3 having a stator core 2 and two insulating disks 6 / 19. In addition, the motor shown also has a rotor assembly, which basically consists of a rotor shaft 5 and a rotor group 4. The rotor shaft 5 is supported in a first ball bearing 10 at the end region of the motor on the B side, and is supported in a second ball bearing 11 at the end region of the motor on the A side.
[0021] The first ball bearing 10 has an outer ring 10a and an inner ring 10b. The inner ring 10b and the rotor shaft 5 are fixedly connected. The second ball bearing 11 has an outer ring 11a and an inner ring 11b. The inner ring 11b and the rotor shaft 5 are fixedly connected.
[0022] The insulating disk 6 is positioned on the end face of the B side of the motor. The insulating disk has an outer wall 6a and an i...
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