Motor

Abstract

The invention provides a motor. The motor comprises a rotating shaft, a rolling piece and an elastic piece; the rotating shaft is provided with a positioning part and a limiting part; the rotating shaft is sleeved with the rolling piece; the rolling piece is provided with a barrel and a rolling body; the rolling body is arranged between the barrel and the positioning part in a rolling mode; and the rotating shaft is sleeved with the elastic piece; and the two ends of the elastic piece abut against the limiting part and the rolling piece correspondingly. According to the motor of the invention,the assembling structure of the rotating shaft and the rolling piece is reasonably arranged, so that centering performance of the assembly of the rolling body relative to the rotating shaft is ensured, and therefore, the friction loss of the rolling piece during the operation of the motor is reduced, the service life of the rolling piece is prolonged, and the vibration noise of the motor is reduced, the operation stability and reliability of a product are improved; the initial pre-pressure of the motor in a start-stop stage is guaranteed through the assembly structure of the elastic piece, sothat the rolling body is prevented from being in an irregular free sliding state, and therefore, abnormal noise generated by the rolling piece during the start and shutdown of the motor is effectively avoided.

Description

technical field [0001] The present invention relates to the technical field of motors, in particular to a motor. Background technique [0002] At present, the development trend of motor miniaturization and high speed is obvious. At the same time, due to the high speed and miniaturization of the motor, many difficulties are encountered in the design and manufacture of the motor. As the speed of the motor increases, the friction loss of the bearing itself increases, and the problem of vibration and noise becomes more serious. In order to reduce bearing loss and improve motor vibration and noise problems, as the motor speed increases, the requirements for the neutrality of the rotor system are getting higher and higher. The good centering of the rotor system can ensure the centering of two or more rows of rolling elements, uniform force and stable operation. [0003] At the same time, in order to prevent rolling body wear caused by the irregular free sliding state of the rol...

AI Technical Summary

Problems solved by technology

However, in the stage of starting and stopping the motor, because the load becomes smaller until it disappears, the axial preload is too small or not, so that the rolling element and the channel slide freely, and the problem of abnormal sound is prominent

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