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Fluid bearing mechanism and brushless motor with said fluid bearing mechanism

A fluid bearing and bearing technology, applied in the field of electric motors, can solve problems such as the increase in the number of parts and the formation of complex structures

Inactive Publication Date: 2003-09-10
TOKYO PARTS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A hydrodynamic bearing with such a structure will increase the number of parts no matter which one, and form a complicated structure, and many processing man-hours and high precision are required in the processing of parts with grooves and through holes.

Method used

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  • Fluid bearing mechanism and brushless motor with said fluid bearing mechanism
  • Fluid bearing mechanism and brushless motor with said fluid bearing mechanism
  • Fluid bearing mechanism and brushless motor with said fluid bearing mechanism

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Experimental program
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Effect test

Embodiment Construction

[0023] specific implementation

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0025] figure 1 It is a sectional view of main parts showing the fluid dynamic pressure bearing mechanism according to the first embodiment of the present invention. exist figure 1 Among them, the bearing housing 2 fastened in the mounting hole of the stator base 1 has an upper bearing part 2a, a lower bearing part 2b and a thrust receiving part 2c supporting the rotating shaft 3 in the axial direction. It has a cylindrical shape, and the rotating shaft 3 is rotatably supported inside it.

[0026] An opening side oil reservoir 2d is provided on the opening side of the bearing housing, a cylinder side oil reservoir 2e is provided on the bottom side, and an intermediate part oil reservoir 2f is provided between the upper bearing part 2a and the lower bearing part 2b.

[0027] Further, an oil circulation hole 2g is provided in parallel ...

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PUM

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Abstract

To provide a fluid bearing mechanism securing high accuracy, achieving considerable reduction of manhour and low cost, and having an oil circulation hole which prevents shortage of oil during high speed rotation. The upper bearing part 2a and lower bearing part 2b for supporting a rotating shaft 3 and thrust receiving part 2c are provided to the inside of a bottomed cylinder in which a bearing housing 2 secured onto a mounting hole of a stator base 1 is sealed, in which oil 4 of a lubrication fluid is filled. The opening side oil sump 2d is provided to the opening side of the cylinder. The bottom side oil sump 2e is provided to the bottom side. The intermediate part oil sump 2f is provided between the upper bearing part 2a and the lower bearing part 2b. The oil circulation hole 2g is provided in parallel to the rotating shaft 3 so as to connect the opening side oil sump 2d, the intermediate part oil sump 2f and the cylinder side oil sump 2e. A space 2h is formed on the opening side, onto which a cap 5 for oil leakage prevention is fixed.

Description

technical field [0001] The invention relates to a fluid bearing mechanism and an electric motor provided with the mechanism. More specifically, it relates to an oil circulation mechanism for generating dynamic pressure in a fluid dynamic pressure bearing. Background technique [0002] In recent years, recording and reproducing devices such as disk media are developing at a high speed. In order to adapt the bearing structure of the spindle motor used in this device to such a high-speed development, hydrodynamic bearings are mostly used. [0003] The structure of this hydrodynamic bearing is as follows, that is, a herringbone groove, etc. The dynamic pressure generating groove is filled with oil as a lubricating fluid in the gap formed by the sliding connection between the rotating shaft and the bearing sleeve. The rotation of the rotating shaft causes the oil in the gap to generate pressure, and the pressure can rotate. Bearings that support the rotor. [0004] Oil used as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/10F16C33/10H02K5/16H02K5/167H02K7/08
CPCH02K5/1675F16C33/107F16C17/026F16C33/103H02K5/16
Inventor 岸勇祐
Owner TOKYO PARTS IND CO LTD