US 2003/0169952 A1Published application

Dynamic bearing device and method for making same

AssigneeNtn Corporation

InventorsNobuyoshi Yamashita, Tetsuya Kurimura

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Abstract

The thrust member is inserted into the inner circumferential surface of the housing, to make the end face of the thrust member contact with the lower side end face of the flange portion, and at the same time, to make the upper side end face of the flange portion contact with the lower side end face of the bearing sleeve. This stated is that the thrust bearing gap is zero. Then, the thrust member is made to relatively move with respect to the housing and the bearing sleeve in the axial direction together with the axis member, with a dimension δ(δ=δ1+δ2) that is equivalent to the sum of the thrust bearing gap (size is δ1) of the first thrust bearing portion and the thrust bearing gap (size is δ2) of the second thrust bearing portion. Then, as the thrust member is fixed to the housing at that position, the predetermined thrust bearing gap δ(δ=δ1+δ2) is formed.

Claims13

Dependent claims

A dynamic bearing device, comprising:

a housing;
a bearing sleeve fixed to an inner circumference of the housing;
an axis member having an axis portion and a flange portion;
a thrust member fixed to the housing;
a radial bearing portion, arranged between an inner circumferential surface of the bearing sleeve and an outer circumferential surface of the axis portion, for supporting the axis portion in a non-contact manner in the radial direction under a dynamic action of lubrication oil generated in a radial bearing gap;
a first thrust bearing portion, arranged between one end face of the bearing sleeve and one end face of the flange portion opposite thereto, for supporting the flange portion in a non-contact manner in the thrust direction under a dynamic action of lubrication oil generated in a thrust bearing gap;
and
a second thrust bearing portion, arranged between an end face of the thrust member and the other end face of the flange portion opposite thereto, for supporting the flange portion in a non-contact manner in the thrust direction under a dynamic action of lubrication oil generated in a thrust bearing gap,
wherein the position of the thrust member with respect to the housing is set, with using the one end face of the bearing sleeve positioned at a predetermined position on the housing as a reference, and thereby, the thrust bearing gaps of the first thrust bearing portion and the second thrust bearing portion are formed with a predetermined dimension.

6 more elements

A method for producing a dynamic bearing device, wherein the dynamic bearing device comprises a housing, a bearing sleeve fixed to an inner circumference of the housing, an axis member having an axis portion and a flange portion, a thrust member fixed to the housing, a radial bearing portion, arranged between an inner circumferential surface of the bearing sleeve and an outer circumferential surface of the axis portion, for supporting the axis portion in a non-contact manner in the radial direction under a dynamic action of lubrication oil generated in a radial bearing gap, a first thrust bearing portion, arranged between one end face of the bearing sleeve and one end face of the flange portion opposite thereto, for supporting the flange portion in a non-contact manner in the thrust direction under a dynamic action of lubrication oil generated in a thrust bearing gap, and a second thrust bearing portion, arranged between an end face of the thrust member and the other end face of the flange portion opposite thereto, for supporting the flange portion in a non-contact manner in the thrust direction under a dynamic action of lubrication oil generated in a thrust bearing gap, the method comprising the steps of:

positioning the bearing sleeve to a predetermined position on the housing;
and
setting the position of the thrust member with respect to the housing with using the one end face of the bearing sleeve as a reference, thereby forming the thrust bearing gap for the first thrust bearing portion and the second thrust bearing portion with a predetermined dimension.

Dependencies are inferred from the claim text.

Facts

Application: 10/364,660Filed 10 Feb 2003
Priority: JP 2002-4262920 Feb 2002
Published: 11 Sep 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F16C 17/107
With grooves in the bearing surface to generate hydrodynamic pressure: with at least one surface for radial load and at least one surface for…
F16C 33/107
Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid: grooves…
F16C 43/02
Assembling bearings: assembling sliding-contact bearings
Y10T 29/49636
Method of mechanical manufacture: process for making bearing or component thereof