Patent ID: 7766552

Claim:
A bearing lubricating device comprising: a casing (C 1 , C 2 ) provided on the outer periphery of an outer ring ( 3 ) of a bearing (B) which rotates relatively to a support shaft ( 1 ); and a lubricating member (A 1 , A 2 ) made of resin provided in the casing (C 1 , C 2 ), the lubricating member being in contact with the outer ring ( 3 ) to apply a lubricant contained in the lubricating member (A 1 , A 2 ) to the outer periphery of the outer ring ( 3 ) after the casing (C 1 , C 2 ) has been fitted over the outer periphery of the outer ring ( 3 ), characterized in that, when the casing (C 1 , C 2 ) is fitted around the outer ring ( 3 ), the lubricating member (A 1 , A 2 ) is in contact with the outer ring ( 3 ) in a position either on a center line (L 2 ), that extends in parallel to a tangent (L 1 ) passing through a contact point (X) between the outer ring ( 3 ) and a supported item (M) borne on the outer ring ( 3 ) and passes through the center of the outer ring ( 3 ), or on the opposite side of the line (L 2 ) to the contact point (X), wherein the lubricating member (A 1 , A 2 ) is disposed in an area on the opposite side, to the contact point (X), of the center line (L 2 ) extending through the center of the outer ring ( 3 ) and parallel to the tangent (L 1 ) passing through the contact point (X) between the outer ring ( 3 ) and the supported item (M) borne on the outer ring ( 3 ), and also in a sector which is symmetrical with respect to a center line (L 3 ) passing through the center of the outer ring ( 3 ) and the contact point (X), and ranges within an angle of 60 degrees on each side from the center line (L 3 ), and an elastic member ( 21 ) interposed between the casing (C 1 , C 2 ) and the lubricating member (A 1 , A 2 ) and pressing the lubricating member (A 1 , A 2 ) against the outer ring ( 3 ) after the casing (C 1 , C 2 ) has been fitted over the outer periphery of the outer ring ( 3 ).