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Method for producing thrust plate and method for producing shaft for hydrodynamic bearing

A technology of dynamic pressure bearing and thrust plate, applied in the direction of shaft and bearing, sliding contact bearing, bearing of rotary motion, etc., can solve the problems of inconsistent inner diameter, single structure, and increased production cost.

Inactive Publication Date: 2008-07-30
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, if the vertical grooves for the communication holes are formed on the inner peripheral surface of the thrust plate when the thrust plate is manufactured according to the pressure forming method, there will be such a problem that due to the cost of the metal mold and the labor time for the test Substantial, leading to increased production costs, because the inner diameter of the circle is not consistent (because the circle is not a single structural circle)

Method used

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  • Method for producing thrust plate and method for producing shaft for hydrodynamic bearing
  • Method for producing thrust plate and method for producing shaft for hydrodynamic bearing
  • Method for producing thrust plate and method for producing shaft for hydrodynamic bearing

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Embodiment Construction

[0026] 1. The first embodiment

[0027] (1) The overall structure of the spindle motor

[0028] FIG. 1 is a vertical sectional view schematically showing a simplified structure of a spindle motor 1 in an embodiment of the present invention. A spindle motor 1 is configured to drive a recording disk such as a hard disk or the like to rotate, and is a part of a recording disk drive device.

[0029] In this embodiment, the line O-O shown in FIG. 1 is the rotation axis of the spindle motor 1 . In addition, in the description of this embodiment, for convenience, the vertical direction in FIG. 1 is set as "axial vertical direction", but this does not limit the direction of the spindle motor 1 in the actual installation situation.

[0030] In FIG. 1 , a spindle motor 1 mainly includes a fixed member 2 , a rotating member 3 and a bearing mechanism 4 . The bearing mechanism 4 supports the rotating member 3 on the fixed member 2 so that the rotating member 3 can freely rotate in the fi...

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Abstract

The present invention provides low cost method of making thrust plate in some structure with notch formed in the inner circumferential surface. The structure of dynamical pressure bearing has shaft and thrust plate assembled onto the shaft. The process of making the thrust plate includes the following steps: forming extending pipe with central hole; drawing the extending pipe to obtain drawn member and forming notch in the inner circumferential surface; and cutting radial the drawn member to form several disc member.

Description

technical field [0001] The present invention relates to a method of manufacturing a thrust plate constituting a shaft for a dynamic pressure bearing together with a shaft body, wherein the outer peripheral surface of the shaft body constitutes a part of a radial bearing portion. More specifically, the present invention relates to a method of manufacturing an annular thrust plate having a central hole in which a shaft body is fitted and the thrust face of which is formed on the thrust plate On both ends of the thrust face forming part of the thrust bearing portion. Background technique [0002] A drive unit for a recording disc such as a hard disk or the like has a spindle motor for rotationally driving the recording disc within the drive unit. The spindle motor is set concentrically with the record disc. The spindle motor mainly includes a fixed component, a rotating component and a bearing mechanism, wherein a stator with an armature coil is fixed on the fixed component; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/04F16C17/10F16C33/14H02K5/16G11B19/20
Inventor 安藤博典居乡博司
Owner NIDEC CORP
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