US 2006/0078243 A1Published application

Bearing device and supporting shaft for bearing device

AssigneeKoyo Seiko Co., Ltd.

InventorsShinya Ochi, Jun Nishiuchi, Chiaki Nishizawa, Yoshitaka Waseda

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Abstract

The bearing devices includes a pair of opposed sidewalls, a supporting shaft which is inserted into shaft end insertion holes provided in the both opposed sidewalls, and a roller supported between the both opposed sidewalls by the supporting shaft. The supporting shaft includes a shaft main body that is made of a steel product subjected to a heating process and has a step shape in which the outer diameters of the both shaft ends are smaller than that of a middle portion and caps which is fitted to the both shaft ends and of which the end can be caulked. An end outer-diameter side edge of the cap is caulked to an inner-diameter side edge of the insertion hole.

Claims10

Dependent claims

A bearing device comprising:

a bearing retaining member including a pair of opposed sidewalls and shaft-end insertion holes which are formed through the pair of opposed sidewalls so as to be coaxially with each other;
a supporting shaft passed through the shaft-end insertion holes, the supporting shaft including:
a shaft main body that is made of a steel product subjected to a heating process and includes a middle portion and a small-diameter end portion in which an end of the supporting shaft has a diameter smaller than that of the middle portion;
and
a cap that is separated from the shaft main body, made of a material which has a hardness smaller than that of the shaft main body and fitted to the small-diameter end portion, and includes an end outer-diameter side edge which is caulked to the shaft-end insertion hole to be fixed to the opposite sidewalls;
and
a roller supported by the middle portion through a plurality of roller elements.

4 more elements

Dependencies are inferred from the claim text.