Method for correcting unbalance of rotor

A rotor and balancing technology, applied in the direction of adjusting/balancing rotors, electromechanical devices, electrical components, etc., can solve problems such as unbalance correction, cumbersome, complicated rotor structure, etc., and achieve the effect of complexity suppression

Active Publication Date: 2017-02-15
MINEBEA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the techniques of Patent Documents 1 and 2, it is necessary to prepare different kinds of adhesives or balance weights, and there is a problem that correction of unbalance is complicated.
In addition, in the techniques of Patent Documents 1 and 2, it is necessary to form grooves for installing adhesive or balance weights in advance at all balance correction positions, which complicates the structure of the rotor.

Method used

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  • Method for correcting unbalance of rotor
  • Method for correcting unbalance of rotor
  • Method for correcting unbalance of rotor

Examples

Experimental program
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Embodiment Construction

[0029] Hereinafter, one embodiment of the present invention will be described based on the drawings.

[0030] [Structure of polygon mirror scanner motor]

[0031] figure 1 It is a cross-sectional view schematically showing the structure of the polygon mirror scanner motor before the unbalance of the rotor is corrected in one embodiment of the present invention.

[0032] figure 1 The shown polygon mirror scanner motor in this embodiment drives the polygon mirror to rotate. The polygon mirror scanner motor mainly includes a rotor 10 and a stator 20 . The rotor 10 is supported by a stator case 32 . The rotor 10 rotates about the rotation axis R relative to the stator 20 .

[0033] The rotor 10 includes a rotor frame 11 , a magnet 12 , a shaft 13 , a top plate 15 , a polygon mirror 16 , and a compression spring 17 . The shaft 13 has a cylindrical shape, and a dynamic pressure groove is formed on either surface of the shaft 13 or the inner diameter portion of the stator case ...

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Abstract

According to the present invention, there is provided an unbalanced correction method for a rotor, and the unevenness of the structure of the rotor can be corrected by a simple method. The adjustment method of the unbalance of the rotor includes a first adjustment step of adjusting an imbalance of the rotor (10) at any one of the adjustment positions (BP1) on the circumference of the plane (PL1); a second adjustment step of adjusting, The adjustment of the imbalance of the rotor (10) at any one of the adjustment positions (BP2) on the circumference of the plane (PL2); and a third adjustment step, after the first adjustment step and the second adjustment step, The imbalance of the rotor (10) is adjusted at any one of the adjustment positions (BP3) on the circumference of the plane (PL1). The third adjustment step is performed on a substantially planar plane in which the radius of the adjustment position (BP3) is smaller than the radius of the adjustment position (BP1) and (BP2).

Description

technical field [0001] The present invention relates to a method for correcting unbalance of a rotor, and more specifically, relates to a method for correcting unbalance of a rotor which can correct the unbalance by a simple method and can suppress complication of the structure of the rotor. Background technique [0002] Motors such as an outer rotor type brushless motor have gradually become more precise and faster due to technological progress. Higher performance and functions are required for motors. Under such circumstances, the vibration of the motor and the noise accompanying the vibration become a large factor that impairs the performance of the motor. [0003] Vibration and noise of a motor are often caused by a deviation of the center of gravity of the rotor from the axis of rotation (hereinafter, sometimes referred to as unbalance of the rotor). The unbalance of the rotor is caused by the eccentricity of the shaft, the eccentricity caused by the combination of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/16
CPCH02K15/165H02K1/2788
Inventor 后藤正树
Owner MINEBEA CO LTD
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