Bearing preload adjustment and locking structure and implementation method for micro motor

Abstract

The invention relates to a bearing preload adjusting and locking structure for a small and special electrical machine and an implementation method. The bearing preload adjusting and locking structureincludes a rotor, a stator, a first bearing, a second bearing, a lock nut, a bearing washer, a bearing outer ring gasket and a bearing inner ring gasket, wherein the outer ring cylindrical surfaces ofthe two bearings are in contact with the cylindrical surface of a rotor shaft sleeve inner cavity; the outer ring inner end surfaces of the two bearings are in contact with the two end surfaces of arotor shaft sleeve stop; the bearing washer is assembled between the inner rings of the two bearings; the bearing outer ring gasket is installed between the first bearing and the rotor shaft sleeve stop; the bearing inner ring gasket is installed between the first bearing and the bearing washer; the lock nut is disposed on the outside of the first bearing and is in threaded connection with a stator output shaft; the threaded joint is coated with anti-loose paint; the boss at the inner end of the lock nut is in close contact with the inner ring of the first bearing; and four blind holes are machined at the outer end of the lock nut. The bearing preload adjusting and locking structure solves the problems that the locking torque of the electrical machine is uneasy to control and poor in stability, and the preload changes greatly after a strong impact.

Description

technical field [0001] The invention belongs to motor design and assembly technology, and in particular relates to a bearing preload adjustment, locking structure and implementation method for a micro-special motor. Background technique [0002] As an important actuator, micro motors are widely used in military and civilian industries. In some precision control fields, the requirements for the starting voltage and static friction torque of the motor are very high, and the motor needs to have strong environmental adaptability. For the self-contained motor, the bearing friction torque after the preload is applied becomes a part of the friction torque of the whole machine, and the preload strength is required to be stable. , the bearing is not loose, the preload remains stable, and the static friction torque of the motor should be close to constant. Therefore, it is particularly important to effectively control and adjust the bearing preload of the motor, and to maintain the ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a bearing preload adjustment, locking structure and implementation method for micro motors, so as to solve the problem of difficult control of the motor locking torque, low stability, strong The problem of large changes in preload after impact

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