Rotor assembly and motor with same

Abstract

The invention provides a rotor assembly and a motor with the same, the rotor assembly comprises a rotating shaft, a first bearing part, a second bearing part and an oil path, and the first bearing part and the second bearing part are both arranged on the rotating shaft; and the oil path is used for transferring heat generated by the first bearing part and / or the second bearing part to the rotating shaft between the first bearing part and the second bearing part. According to the rotor assembly and the motor with the rotor assembly, heat on the bearing can be prevented from being transmitted to the end part of the rotating shaft.

Description

technical field [0001] The present application belongs to the technical field of motors, and in particular relates to a rotor assembly and a motor having the same. Background technique [0002] At present, when the feed servo motor used in machine tools is working at this stage, the friction loss caused by the high-speed rotation of the front and rear bearings is often transmitted to the encoder end and the shaft extension end in the form of heat at the same time: when the heat is transferred to the encoder, Its accuracy will decrease as the temperature rises. When the temperature rises seriously exceeds the standard, it will even cause irreversible damage to the electrical components of the encoder, which directly affects the machining accuracy of the feed servo system of the machine tool; and when the heat of the bearing is transferred to the shaft end of the motor , as the temperature increases, the backlash of the transmission structure will also increase, resulting in a...

AI Technical Summary

Problems solved by technology

[0002] At present, when the feed servo motor used in machine tools is working at this stage, the friction loss caused by the high-speed rotation of the front and rear bearings is often transmitted to the encoder end and the shaft extension end in the form of heat at the same time: when the heat is transferred to the encoder, Its accuracy will decrease as the temperature rises. When the temperature rises seriously exceeds the standard, it will even cause irreversible damage to the electrical components of the encoder, which directly affects the machining accuracy of the feed servo system of the machine tool; and when the heat of the bearing is transferred to the shaft end of the motor , as the temperature rises, the backlash of the transmission structure will also increase, resulting in a decrease in machining accuracy

The continuous rise of temperature will also cause the grease of the bearing itself to volatilize, and the lubrication will reduce the wear and tear, and the above problems will be more serious, forming an endless loop

So when the heat on the bearing is transferred to the end of the shaft, it will affect the performance of the motor

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