KR0122996Y1 - Motor - Google Patents

Abstract

Disclosed is a rotating polyscopy driving motor for driving a rotating polyscopy to change an optical path of a laser light in a laser printer and a laser scanner. The laser printer and the laser scanner can minimize the vibration in the high-speed rotation to be printed and scanned at a high speed, and the rotor rotates to provide a highly reliable and reliable rotating multi-faceted driving motor, and around the rotor And a stator for rotating the rotor, a shaft fixed together with the stator to support the rotation of the rotor, and a hemispherical fluid bearing installed on the shaft to support the rotation of the rotor.

Description

Rotating Polygon Drive Motor

1 is a schematic diagram showing main parts of a general laser printer.

2 is a cross-sectional view showing the main part of a conventional rotating multi-faceted driving motor.

Figure 3 is a cross-sectional view showing the main part of the rotary multi-faceted driving motor according to the present invention.

* Explanation of symbols for main parts of the drawings

10: stator 20: rotor

30: shaft 40: hemisphere bearing

41: upper hemisphere 42: lower hemisphere

43: washer 44: bush

45: ring

The present invention relates to a bearing used in a rotating multi-faceted driving motor, and more particularly, to a hemispherical fluid bearing used in a driving motor for driving a rotating multi-faceted mirror to change the optical path of the laser light in the laser printer and laser scanner. will be.

Society is gradually transforming into the high information age, and the amount of information to be handled in various fields such as general offices and public institutions is increasing rapidly. Therefore, the development of an optical information processing apparatus using various excellent properties of light in order to process a large amount of information at high speed is in progress.

The optical information processing apparatus includes a laser printer and a laser scanner. The optical information processing apparatus has been developed for the purpose of printing or scanning a large amount of information at high speed. As shown in FIG. 1, the laser 1, the high speed beam deflector 2, and the light condensing properties are excellent. It consists of a rotating face mirror 3, a rotating face mirror driving motor 4, and the like.

2 is a cross-sectional view showing the main part of a bearing used in a conventional rotating multi-faceted driving motor. As shown, between the shaft 30 and the stator 10 integral with the rotor 20 of the motor, two ball bearings 40 are provided at the top and the bottom.

In the case of using a ball bearing as described above, the noise and rotational degree due to the vibration of the motor did not have a significant effect on printing and scanning in low speed rotation. However, in order to print and scan at high speed, the rotating face mirror should be rotated at a speed higher than 20000 RPM. If ball bearings are used as contact bearings, problems such as noise caused by vibration and the degree of rotation adversely affect image quality may occur.

Therefore, an object of the present invention is to provide a highly reliable and reliable rotating multi-faceted driving motor that can minimize vibration at high speed so that the laser printer and the laser scanner can be printed and scanned at high speed.

Rotatable multi-faceted driving motor for achieving the object of the present invention is: a rotation provided with a stator installed in the rotary multi-faceted driving motor, a rotor installed to correspond to the stator, a bearing installed between the rotor and the stator In the multi-faceted driving motor, the bearing has an upper half and a lower half faced to face and installed on the rotor, and a bush member installed on the stator to support and rotate the upper and lower hemispheres. It is characterized by.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view showing the main part of the rotary multi-faceted driving motor according to the present invention. As shown in the figure, the rotary mirror drive motor includes a rotor 20 for rotating the above-mentioned rotary mirror, a stator 10 installed around the rotor 20 to support the rotor, and a rotor ( And a hemispherical fluid bearing 40 installed between the stator 10 and the shaft 30.

The hemispherical fluid bearing 40 is inserted into the shaft 30 between the upper hemisphere 41 and the lower hemisphere 42 and the upper hemisphere 41 and the lower hemisphere 42 fixed to the shaft 30 to insert the bush 44. Washer 43 to maintain the clearance of the wa, the bush 44 is fixed to the stator 10 to support the upper hemisphere 41 and the lower hemisphere 42 to rotate, the upper hemisphere 41, the lower hemisphere 42 It is configured to include a ring 45 for fixing to the shaft (30).

Looking at the assembly process of the hemispherical fluid bearing first, the upper hemisphere 41 is inserted, press-fitted, and bonded to fix the shaft 30 firmly so that slip does not occur. Then, the washer 43 is inserted into the shaft 30, and the bush 44 is assembled to the upper hemisphere 41. The lower hemisphere 42 is then inserted, press-fitted and bonded to fix it to the shaft 30. Finally, the ring 45 is forcibly fitted to the shaft 30.

The hemispheres 41 and 42 are supported by the bush 44 and can be rotated without contacting the bush 44 by oil or air therebetween. Therefore, the hemispherical fluid bearing according to the present invention has no vibration and noise even at high speed, and has excellent reliability by improving the degree of rotation.

The upper hemisphere and the lower hemisphere are installed on the rotor, and the bush has been described as an example, but the upper and lower hemispheres may be installed on the stator according to the shape and type of the motor, and the bush is installed on the rotor. Can be.

As described above, the present invention can provide a rotating multi-faceted driving motor that minimizes vibration at high speed and enables reliable printing and scanning of the laser printer and the laser scanner at high speed.

Claims (3)

In a rotary mirror drive motor having a stator mounted on a rotating polyhedral drive motor, a rotor installed to correspond to the stator, and a bearing provided between the rotor and the stator, the bearings face to face the rotor. Rotatable mirror drive motor characterized in that it comprises an upper hemisphere and a lower hemisphere, and a bush member installed in the stator to support and rotate the upper and lower hemispheres. According to claim 1, wherein the upper hemisphere and the lower hemisphere is installed on the stator, the bushing member is a rotating polyhedral drive motor, characterized in that installed on the rotor. The rotating polyhedral drive motor according to claim 1 or 2, wherein a washer is provided between the upper and lower hemispheres to maintain a clearance between the upper and lower hemispheres and the bush.