Electroformed bearing and method of manufacturing same
AssigneeNtn Corporation
InventorsIsao Komori, Yasuhiro Yamamoto, Kenji Hibi
Life of this patent
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Abstract
Fine particles (6) are retained by an electroformed portion (4) in a dispersed state, and the fine particles (6) exposed from an outer peripheral surface (4a2) of the electroformed portion (4) are molten so as to form micro projections (60) integrated with a resin portion (5). The micro projections (60) enters into fine-particle traces (4c) formed in the electroformed portion (4) to exert an anchor effect, to thereby increase a fixation force between the resin portion (5) and the electroformed portion (4).
Claims6
An electroformed bearing, comprising:
- a shaft member;
- an electroformed portion comprising an inner peripheral surface which is opposed to an outer peripheral surface of the shaft member through a radial bearing clearance;
- and
- a resin portion which is injection-molded with the electroformed portion used as an insertion component,
- wherein the electroformed portion retains fine particles in a dispersed state, and fine particles exposed from a surface coming into contact with the resin portion of the electroformed portion are molten so as to be integrated with the resin portion.
An electroformed bearing, comprising:
- a shaft member;
- an electroformed portion comprising an inner peripheral surface which is opposed to an outer peripheral surface of the shaft member through a radial bearing clearance;
- and
- a resin portion which is injection-molded with the electroformed portion used as an insertion component,
- wherein the electroformed portion retains fine particles inside thereof in a dispersed state, and has fine-particle traces on a surface coming into contact with a resin, the fine-particle traces being filled with micro projections integrated with the resin portion.
A method of manufacturing an electroformed bearing comprising a shaft member, an electroformed portion comprising an inner peripheral surface which is opposed to an outer peripheral surface of the shaft member through a radial bearing clearance, and a resin portion which is injection-molded with the electroformed portion used as an insertion component, the manufacturing method comprising:
- depositing the electroformed portion in a solution in which the fine particles are dispersed, to thereby form the electroformed portion which retains fine particles in a dispersed state;
- and
- injecting a resin in a cavity in which the electroformed portion is arranged, to thereby melt, by the injected material, the fine particles which is exposed on a surface of the electroformed portion so as to be integrated with the resin portion.
An electroformed bearing, comprising:
- a shaft member;
- an electroformed portion comprising an inner peripheral surface which is opposed to an outer peripheral surface of the shaft member through a radial bearing clearance;
- and
- a resin portion which covers the electroformed portion and is held in close contact with the electroformed portion,
- wherein, of the resin portion, a surface coming into contact at least with the electroformed portion is provided with high-adhesion-force portions having an adhesion force with respect to the electroformed portion higher than an adhesion force of other region of the resin portion.
Dependencies are inferred from the claim text.