Unlock instant, AI-driven research and patent intelligence for your innovation.

Dynamic pressure type fluid bearing device and method of manufacturing the fluid bearig device

A technology for fluid bearings and manufacturing methods, applied in the direction of sliding contact bearings, rotating bearings, bearings, etc., can solve the problems of many assembly man-hours, hindering cost reduction, assembly errors, etc.

Inactive Publication Date: 2005-01-12
PANASONIC CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned bearing, since the shaft and the two sealing parts are separate parts, assembly errors will occur during assembly, and assembly man-hours will also increase, which hinders cost reduction.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dynamic pressure type fluid bearing device and method of manufacturing the fluid bearig device
  • Dynamic pressure type fluid bearing device and method of manufacturing the fluid bearig device
  • Dynamic pressure type fluid bearing device and method of manufacturing the fluid bearig device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Refer below Figure 1 ~ Figure 3 Example 1 of the present invention will be described. Figure 1 ~ Figure 3 It is a cross-sectional view of main parts of the dynamic pressure fluid bearing device in Embodiment 1 of the present invention.

[0026] Such as figure 1 As shown, the bearing device has a shaft 1 with a large-diameter portion 2 formed below, a cylindrical sleeve 3 rotatably attached to the shaft 1 , and a seal member 4 disposed above. The inner diameter of both ends of the sleeve 1 is larger than that of the center. A centripetal bearing portion is formed on opposing surfaces of the shaft 1 and the sleeve 3 . That is, the first seal member 102 and the shaft 101 are integrally formed in the conventional bearing device, but the structure of the bearing device of this embodiment is simplified. Shaft 1 and sleeve 3 form a radial bearing. The large diameter portion 2 of the shaft 1 and the sealing member 4 and the sleeve 3 form a thrust bearing. That is, the ...

Embodiment 2

[0032] Refer below Figure 4 ~ Figure 6 A method of manufacturing the dynamic pressure type fluid bearing device according to Embodiment 2 of the present invention will be described. The basic structure of the dynamic pressure fluid bearing device in this embodiment is the same as that of the first embodiment described above, so the same reference numerals are assigned to the same parts, and detailed description thereof will be omitted.

[0033] Figure 4 It is a cross-sectional view of the main part of the bearing device in the state where the jig is attached when the lubricating oil is injected. The sealing member 4 is formed of a magnetic body. Therefore, by the attractive force of the annular magnet 5 fixed on the disc-shaped jig 8 and the sealing member 4, the annular elastic body 7 such as rubber is positioned at the capillary seal 6 that seals the lubricating oil while being pressed against the jig 8 . Above the opening of the bearing, seal the upper part of the bear...

Embodiment 3

[0039] refer to Figure 7 ~ Figure 10 Example 3 will be described. Figure 7 as well as Figure 9 It is a sectional view of the main part of the dynamic pressure type bearing device in Example 3. Figure 8 as well as Figure 10 respectively Figure 7 and Figure 9 An enlarged cross-sectional view of the main part. Components having the same functions as those described in the above-mentioned embodiments are given the same reference numerals.

[0040] In this example, if Figure 7 , Figure 8 As shown, a plurality of through-holes 3a are provided on the sleeve 3 so as to be concentric with the capillary seal 6 provided at the upper and lower openings of the bearing device, and the large-diameter portion 2 facing the through-hole 3a and the sealing member The corners of 4 are cut off more than the other 2 corners.

[0041] Additionally, if Figure 9 , Figure 10 As shown, the corner portion of the sleeve 3 facing the lubricating oil-sealed capillary seal 6 may be cut of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A hydrodynamic bearing unit and a manufacturing method therefor that reduce manufacturing costs and prevent leakage of lubricating oil are provided. The bearing unit includes a shaft, a sleeve which is rotatably mounted to the shaft and which forms a radial bearing in cooperation with the shaft, and a pair of seal members which are fixed to the shaft, which form respective thrust bearing parts in cooperation with the sleeve, and which seal lubricating oil circulating in the bearing unit. The shaft has a large-diameter part functioning as one of the seal members. The other seal member is fixed to the shaft by press-fitting.

Description

technical field [0001] The present invention relates to a dynamic pressure type fluid bearing device used in a magnetic disk drive device and the like and its manufacturing method. Background technique [0002] In conventional dynamic pressure type fluid bearing devices, the seal member is a separate member from the shaft. Regarding the injection of lubricating oil, the lubricating oil is injected by immersing the entire bearing unit in lubricating oil in a vacuum state, and then returning to atmospheric pressure. Or when assembling the bearing unit, drip lubricating oil into the bearing. Next, a conventional dynamic pressure type fluid bearing device and its manufacturing method will be described. [0003] Figure 12 It is a sectional view of main parts of a conventional dynamic pressure bearing device. This bearing device has a shaft 101 provided on a base plate (not shown), and a cylindrical sleeve 103 rotatably attached to the shaft 101 . The inner diameters of both ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F16C17/04F16C17/10F16C33/10F16C33/14F16C33/74G11B19/20H02K5/16H02K7/08
CPCF16C17/10F16C33/74F16C33/10F16C2370/12G11B19/2018
Inventor 中村纯一
Owner PANASONIC CORP