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Motor provided with holding structure for radial bearing

A technology for electric motors and bearings, applied in the field of electric motors, can solve problems such as radial vibration of the rotating shaft, increased shaking, and increased vibration, and achieve the effects of preventing radial vibration, suppressing deformation of the inner diameter, and high coaxiality

Inactive Publication Date: 2009-01-28
SANKYO SEIKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the estimated change in the inner diameter does not occur, the play due to the gap between the shaft and the radial bearing will increase, resulting in radial runout of the shaft, noise during motor drive, and vibration. Exacerbate the same problem like

Method used

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  • Motor provided with holding structure for radial bearing
  • Motor provided with holding structure for radial bearing
  • Motor provided with holding structure for radial bearing

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Embodiment Construction

[0049] Embodiments of the motor of the present invention will be described in detail below with reference to the drawings.

[0050] figure 1It is a sectional view of the motor 1 of this embodiment. The motor 1 of the present embodiment includes: a rotor 10, a stator 20, a first bearing part 30, and a second bearing part 40, wherein the first bearing part 30 is formed by a first bearing part rotatably supporting the rotor 10 on the output side of the motor 1. A radial bearing 34 and the first plate 32 that is fixedly connected to the output side end face of the stator 20 to install the first radial bearing 34 are formed, and the second bearing part 40 is formed by placing the rotor 10 on the anti-output side of the motor 1 (with the output The second radial bearing 44 rotatably supported on the opposite side of the stator 20 , and the second plate 42 fixedly connected to the end surface of the stator 20 on the opposite output side to mount the second radial bearing 44 .

[00...

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Abstract

The present invention may provide a motor which is capable of preventing axis run-out or the like of a rotation shaft with a simple structure and is capable of reducing noise, vibration or the like during driving of the motor. The motor may include a rotor having a rotation shaft, a stator, a first radial bearing and a second radial bearing which rotatably support the rotation shaft. The motor may further include a second plate which is fixed to the end face of the stator and is formed with a second bearing insertion opening into which the second radial bearing is inserted. The second bearing insertion opening is formed with a bearing abutting part which abuts with an outer peripheral face of the second radial bearing to restrict movement in a radial direction of the second radial bearing, and a cut-out part which is radially recessed from an inner circumferential edge of the bearing abutting part for reducing an abutting area of the second radial bearing with the second bearing insertion opening.

Description

technical field [0001] The present invention relates to an electric motor, and more particularly, to a holding structure for a bearing supporting a motor shaft. Background technique [0002] There are known electric motors used as drive sources for digital cameras, digital video cameras, optical disk drives (ODDs), and the like. As an example of such a motor, Patent Document 1 describes a motor whose rotation shaft is supported by two radial bearings. [0003] The coaxiality of the two radial bearings is an important factor in determining the quality of this motor. If the coaxiality is low, radial runout of the rotating shaft will occur, which will increase noise and vibration during driving. Therefore, these radial bearings are preferably mounted by being press-fitted into the bearing support holes of the side plates for holding the bearings. [0004] Patent Document 1: Japanese Patent Laid-Open No. 6-178526 [0005] However, when a press-fit allowance is set between th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/16
CPCH02K5/1672
Inventor 河西繁
Owner SANKYO SEIKI MFG CO LTD
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