Plastic retainer for roller bearing
AssigneeNippon Seiko Kabushiki Kaisha
InventorJunichi Hatano
Life of this patent
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Abstract
In a plastic retainer for roller bearing comprising first and second annular members disposed in axially spaced apart relationship, a plurality of posts containing the annular members and disposed circumferentially equidistantly, and a pocket for containing a roller formed between two adjacent posts and the annular members, the side surface of the post forming the pocket which is adjacent to the first annular member has a planar portion, the connecting portion between the planar portion and the first annular member provides a curved surface concave toward the pocket, and the radius of curvature of the curved surface is minimum on the pitch circle of the roller and is greater toward at least one side of the radial direction of the retainer.
Claims7
A plastic retainer for roller bearing comprising first and second annular members disposed in axially spaced apart relationship, a plurality of posts connecting said annular members and disposed circumferentially equidistantly, and a pocket for containing a roller formed between two adjacent posts and said annular members, characterized in that the side surface of the post forming said pocket which is adjacent to said first annular member has a planar portion, the connecting portion between said planar portion and said first annular member provides a curved surface concave toward said pocket, and the raidus of curvature of said curved surface is minimum on the pitch circle of the roller and is greater toward at least one side of the radial direction of said retainer.
A plastic retainer for roller bearing comprising first and second annular members disposed in axially spaced apart relationship, a plurality of posts connecting said annular members and disposed circumferentially equidistantly, and a pocket for containing a roller formed between two adjacent posts and said annular members, characterized in that the side surface of the post forming said pocket which is adjacent to said first annular member has a planar portion, the connecting portion between said planar portion and said annular members is connected by a curved surface having its center of curvature in said pocket, and the radius of curvature of said curved surface is minimum on the pitch circle of the roller and is greater toward at least one side of the radial direction of said retainer.
Dependencies are inferred from the claim text.