Pulley ball bearing and pulley
AssigneeNtn Corporation
InventorsMasao Fukuwaka, Seiya Inoue, Takahiro Kanamoto, Hiroshi Kawamura
Life of this patent
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Abstract
A ball bearing for a pulley that is a component of a wrapping connector transmission device installed to an engine for an automobile. In the bearing, the depths of ball grooves formed in the inner ring and the outer ring of the ball bearing are set so that the risk rate of the ball being stranded on the shoulder becomes approximately the same for the inner ring and the outer ring under pure thrust load. Furthermore, the depth of the ball groove of the outer ring is set shallower than the depth of the ball groove of the inner ring. The depth of the ball groove of the outer ring is set in a range of 12-19% of the diameter of the ball.
Claims12
A ball bearing for a pulley, the bearing being fitted into a pulley main body having a pulley circumferential surface coming into contact with a belt,
- the ball bearing for a pulley characterized by making a depth of a ball groove in an outer ring of said ball bearing shallower than a depth of a ball groove in an inner ring of said ball bearing and setting the depth of the ball groove in said outer ring of said ball bearing in a range of 12% to 19% of a ball diameter.
Dependencies are inferred from the claim text.