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

A technology of dynamic pressure bearings and thrust plates, applied in the direction of shafts and bearings, bearings, shafts, etc., can solve problems such as single structure, inconsistent inner diameter, and increased production costs

Inactive Publication Date: 2006-01-04
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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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] figure 1 It is a vertical cross-sectional view schematically showing the simplified structure of the spindle motor 1 in an embodiment of the present invention. The spindle motor 1 is configured to drive a recording disk (such as a hard disk or the like) to rotate, and the spindle motor 1 is a part of a recording disk drive device.

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

[0030] in figure 1 Among them, the 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 membe...

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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, the thrust plate and a shaft main body together constitute a shaft for a dynamic pressure bearing, wherein the outer circumferential surface of the shaft main body constitutes a part of a radial bearing portion. More specifically, the present invention relates to a method of manufacturing an annular thrust plate, the thrust plate has a central hole, the shaft body is fitted in the central hole, and the thrust surface of the thrust plate is formed on the thrust plate The two ends of the thrust surface constitute a part of the thrust bearing part. Background technique [0002] The drive device of a recording disc (such as a hard disk or the like) has a spindle motor for rotationally driving the recording disc in the drive device. The spindle motor is arranged concentrically with the recording disk. The spindle motor mainly includes a fixed member, a rotating member, and a bearing mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C3/02F16C32/06H02K5/16G11B19/20
Inventor 安藤博典居乡博司
Owner NIDEC CORP
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