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US 2003/0113045 A1Published application
Bearing device and motor with the bearing device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorHiroyasu Fujinaka
Life of this patent
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Abstract
A bearing device includes an oil impregnated sintered bearing that rotatably holds a shaft fixed to a rotor, and a bearing boss to which inner wall the bearing is fixed. An end of the boss is sealed with a cap. Plural grooves are formed on the inner wall of the cap, so that lubricant leaked out from the bearing can be retained therein and restored to the bearing. This structure extends the service life of the bearing.
Claims14
A bearing device comprising:
- an oil impregnated sintered bearing that rotatably holds a shaft fixed to a rotor;
- a bearing boss firmly holding the bearing with inner wall thereof;
- and
- a cap for sealing one end of the bearing boss,
- wherein a plurality of grooves are formed on inner wall of the cap for retaining lubricant leaked out from the bearing and for restoring the lubricant to the bearing.
2 more elements
A bearing device comprising:
- an oil impregnated sintered bearing that rotatably holds a shaft fixed to a rotor;
- a bearing boss firmly holding the bearing with inner wall thereof;
- and
- a cap for sealing one end of the bearing boss,
- wherein a plurality of grooves are formed on inner wall of the bearing boss at the cap side for retaining lubricant leaked out from the bearing and for restoring the lubricant to the bearing.
2 more elements
A bearing device comprising:
- an oil impregnated sintered bearing that rotatably holds a shaft fixed to a rotor;
- a bearing boss firmly holding the bearing with inner wall thereof;
- and
- a cap for sealing one end of the bearing boss,
- wherein the cap is made of porous material for retaining lubricant leaked out from the bearing and for restoring the lubricant to the bearing.
2 more elements
Dependencies are inferred from the claim text.