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US 2007/0177830 A1Published application
Fluid bearing device
AssigneeNtn Corporation
InventorsFuminori Satoji, Seiji Shimizu, Kenji Ito, Isao Komori, Ryouichi Nakajima
Life of this patent
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Abstract
The preset invention aims to improve the assembly accuracy and rotation accuracy of a fluid bearing device, and to further reduce the cost thereof. A bearing sleeve is fixed on the inner periphery of a housing. An axial member is supported in a non-contact manner in a radial direction by an oil film formed in a radial bearing gap. The housing made of resin is injection molded with the use of a substrate as an insert part. On the substrate, a control circuit for controlling a polygon scanner motor is mounted.
Claims6
A dynamic bearing device comprising:
- a housing,
- a bearing sleeve fixed on the inside of the housing, and
- an axial member which is inserted into the inner periphery of the bearing sleeve and rotates relatively to the bearing sleeve,
- the bearing sleeve supporting the axial member in a non-contact manner in a radial direction, by use of dynamic pressure action of a lubricating oil generated in a radial bearing gap between the inner peripheral surface of the bearing sleeve and the outer peripheral surface of the axial member when the axial member rotates,
- wherein the dynamic bearing device further comprises a bracket which is disposed on the outer periphery of the housing and has an attachment portion for a motor stator, and
- at least one of the housing and the bracket is made of resin, and the housing and the bracket are integrally molded.
3 more elements
Dependencies are inferred from the claim text.