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Bearing device and motor with same

A technology for bearing devices and electric motors, which is applied to the rigid support of bearing components, bearings, electromechanical devices, etc., can solve the problems of reducing the life of bearing devices, insufficient supply of lubricating oil to the sliding surface of the shaft, and the accumulation of oil, so as to improve the life of bearings Effect

Inactive Publication Date: 2008-10-01
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As in the case of the above-mentioned conventional structure where one end of the bearing is completely sealed with an end cover, when the motor is operating, the lubricating oil leaked from the sintered oil-impregnated bearing due to temperature rise and vibration will accumulate in the above-mentioned end cover and cannot return to the sintered oil-impregnated bearing. inside the bearing
Therefore, the amount of lubricating oil in the bearing is substantially depleted, and the same as when the lubricating oil is consumed, the lubricating oil cannot be sufficiently supplied to the sliding surface of the shaft, which is one of the main factors that shorten the life of the bearing device.

Method used

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  • Bearing device and motor with same
  • Bearing device and motor with same
  • Bearing device and motor with same

Examples

Experimental program
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Effect test

no. 1 Embodiment

[0031] Fig. 1 is a cross-sectional view showing the structure of a fan motor having a bearing device according to a first embodiment of the present invention. figure 2 It is a detailed sectional view of the bearing device of the first embodiment. image 3 Yes figure 2 Sectional view of the bearing bushing of the bearing unit shown. Figure 4 is a perspective view of an end cover of the bearing device. Figure 5 It is a detailed sectional view of the periphery of the end cover of the bearing device.

[0032] Fig. 1 shows the structure of a fan motor for cooling equipment.

[0033] In FIG. 1, a housing 1 and an external mounting portion of a motor and a bearing bush 2 are integrally formed with resin. While fixing the stator portion of the motor to the bearing bush 2, it also constitutes a bearing device. The structure of the bearing device is as follows. A sintered oil-impregnated bearing 3 is pressed and fixed on the inner wall of the bearing bush 2 . A shaft 4 fixed ...

no. 2 Embodiment

[0051] Image 6 is a detailed sectional view of the bearing device of the second embodiment, Figure 7 Yes Image 6 A detailed cross-sectional view of the shown bearing unit near the end cover.

[0052] The second embodiment of the present invention is an example of further improvement of the lubricating oil sealing mechanism and the end cover holding mechanism of the above-mentioned first embodiment.

[0053] In the above-mentioned first embodiment, the end cap 9 is cylindrical, and as Image 6 and Figure 7 As shown, a flange 21 whose outer diameter protrudes a step is provided at the lower part of the end cover 20 of the second embodiment of the present invention, and the outer periphery of the flange 21 is fixed on the inner wall of the bearing bush 2 . The taper of the tapered portion 22 of the bearing bush 2 is larger than that of the first embodiment, and the space formed by the end cover 20 and the bearing bush 2 is ensured to form a larger space 23 than that of th...

no. 3 Embodiment

[0059] Figure 8 is a detailed sectional view of the bearing device of the third embodiment, Figure 9 Yes Figure 8 A detailed cross-sectional view of the periphery of the end shield of the bearing unit shown.

[0060] In the third embodiment of the present invention, one end of the bearing bush 24 is fixed by the end cover 25, which is the same as the above-mentioned first and second embodiments. However, in the third embodiment of the present invention, the end cover 25 is in the shape of a single disc, and no grooves for oil recovery are provided. Instead, a plurality of grooves 26 are formed in the end cover side inner wall of the bearing bush 24 .

[0061] Here, in the above-mentioned first and second embodiments, the end caps are made of the same resin as the case, but the end caps 25 of the third embodiment of the present invention are formed by pressing plated steel sheets. Compared with resin injection molding, although general stamping molding can only form simp...

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Abstract

A bearing device formed so as to seal one end of a bearing boss with a cap, comprising an oil-impregnated sintered bearing rotatably holding a shaft fixed to a rotor and the bearing boss having the bearing fixed to the inside wall thereof, whereby the lubricating oil leaked from the bearing can be held and collected by providing a plurality of grooves in the inside wall of the cap, and thus the service life of the bearing can be increased.

Description

technical field [0001] The present invention relates to a small-sized motor and its bearing device. In particular, it relates to a motor bearing device suitable for OA equipment such as personal computers, workstations, and laser beam printers, or AV equipment such as DVD devices and VTRs. Background technique [0002] In OA equipment and AV equipment, multiple motors are used as the driving source of the equipment. As the bearing device of these motors, sintered oil-impregnated bearings are mainly used in view of the manufacturing cost and performance. [0003] These motors for OA equipment and AV equipment are more frequently used for high-speed rotation than conventional motors due to the high-speed and multi-functionalization of equipment in recent years. For example, the spindle motor for a disk drive installed in a CD-ROM device such as a personal computer is required to increase the speed from the conventional hundreds of revolutions per minute to more than 10,000 re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/10F16C35/02H02K5/167F16C33/12
CPCF16C33/107F16C33/12F16C33/103F16C2204/60
Inventor 藤中广康
Owner PANASONIC CORP
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