Bearing apparatus and lubrication unit
AssigneeJtekt Corporation
InventorsBoyko Stoimenov, Kiyoshi Tanimoto
Life of this patent
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Abstract
A bearing apparatus includes a bearing portion having an outer ring, an inner ring, a plurality of balls interposed between the outer ring and the inner ring, and a cage that holds the balls, and a lubrication unit provided adjacently to the bearing portion in an axial direction thereof to feed lubricant to a lubrication area that needs to be lubricated. The lubrication unit has a tank that stores the lubricant, and a pump that ejects the lubricant toward the lubrication area. The pump has an ejection port that is open toward the lubrication area and through which the lubricant is ejected at a predetermined initial velocity in the form of a 0.5 to 1,000 picoliter oil droplet.
Claims7
A bearing apparatus comprising:
- a bearing portion having a fixed ring, a rotating ring that is coaxial with the fixed ring, a plurality of rolling elements interposed between the fixed ring and the rotating ring, and a cage that holds the rolling elements;
- and
- a lubrication unit provided adjacently to the bearing portion in its axial direction to feed lubricant to a lubrication area that needs to be lubricated, wherein
- the lubrication unit has a tank that stores the lubricant, and a pump that ejects the lubricant toward the lubrication area,
- the pump has an ejection port with an opening toward the lubrication area and through which the lubricant is ejected at a predetermined initial velocity in the form of a 0.5 to 1,000 picoliter oil droplet, and
- the opening directed toward the lubrication area allows the oil droplet to be ejected from the opening through a space of the bearing portion and fed directly to the lubrication area.
A lubrication unit provided in a rotating apparatus to feed lubricant to a lubrication area of the rotating apparatus, which needs to be lubricated, the lubrication unit comprising:
- a tank that stores the lubricant and a pump that ejects the lubricant toward the lubrication area, wherein
- the pump has an ejection port with an opening toward the lubrication area and through which the lubricant is ejected to the lubrication area at a predetermined initial velocity in the form of a 0.5 to 1000 picoliter oil droplet, and
- the opening directed toward the lubrication area allows the oil droplet to be ejected from the opening through a space of the bearing portion and fed directly to the lubrication area.
Dependencies are inferred from the claim text.