Positioning structure of rotating shaft axial detection piece, and motor

Abstract

The invention provides a positioning structure of a rotating shaft axial detection piece, and a motor. The positioning structure comprises a rotating shaft, the rotating shaft comprises a first shaft section and a second shaft section which are adjacently arranged along the axial direction of the rotating shaft, the diameter of the second shaft section is larger than that of the first shaft section, the first shaft section is sequentially and adjacently sleeved with a threaded fastener, a first gasket, an axial detection piece and a second gasket along the axial direction from the first shaft section to the second shaft section, and the side, away from the axial detection piece, of the second gasket is adjacently connected with the end face, facing the first shaft section, of the second shaft section. According to the invention, the distance between the threaded fastener and the end face of the second shaft section is kept unchanged, so that the dynamic balance of the rotor can be ensured not to be damaged due to the disassembly of the motor, and the phenomenon of vibration of the motor caused by the damage can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and in particular relates to a positioning structure of a rotating shaft axial detection part and a motor. Background technique [0002] Due to the country's promotion of industrial upgrading, the field of motors continues to develop towards high speed and miniaturization. With the gradual increase of motor power and speed, the stability of the rotor during high-speed operation has a very important impact on the electromagnetic performance and vibration noise of the motor. Therefore, The whole system puts forward higher requirements on the dynamic balance of the rotor. [0003] At this stage, it is known that the axial detection device and the main shaft in the motor adopt an interference fit, and the axial detection device needs to be thermally inserted into the shaft. Because the axial detection device guide parts are small and have a high heat rate, the axial detection device Afte...

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Problems solved by technology

[0003] At this stage, it is known that the axial detection device and the main shaft in the motor adopt an interference fit, and the axial detection device needs to be thermally inserted into the shaft. Because the axial detection device guide parts are small and have a high heat rate, the axial detection device After preheating, it needs to be quickly transferred to the main shaft, and because there is no limit structure designed between the axial detection device and the main shaft, it cannot be guaranteed that the axial detection device will be installed back to its original position during repeated disassembly and assembly, and it will also cause overheating. The surplus becomes smaller; the axial sensor (that is, the axial detection part) in the related art has a linear interval between the detection signal and the distance, and there is a gasket between the axial detection part and the rotating shaft to locate the axial position of the axial detection device , to ensure that the distance between the axial detection device and the axial sensor is within the linear range, and there is no gasket between the precision nut and the axial detection device. When the motor is assembled, there is an error in the axial position of the stator component. To ensure that the axial The distance between the detection device and the sensor also needs to use gaskets to leave a margin in the axial position of the axial detection device for subsequent adjustments. In order to eliminate the axial assembly error of the motor stator parts, the axial detection part The position needs to be adjusted within a certain range. This adjustment process requires changing the thickness of the gasket. After adjusting gaskets of different thicknesses, the axial position of the precision nut will change, that is, it cannot be guaranteed that the precision nut can be screwed. to the same position as before, so that the dynamic balance of the rotor is destroyed after adjustment, resulting in severe vibration of the motor

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