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AssigneeNsk Ltd.
InventorsAkiyoshi Honda, Masahide Matsubara, Kunio Fukuda, Hiroyuki Sawai, Toshiyuki Suzuki, Akiyoshi Yamaguchi
Estimating the term…
A roller cage made of metal for holding rollers of a roller bearing, includes: separation bars separately defining a plurality of window holes along a peripheral direction of the bearing with a constant interval thereamong. The window holes respectively receive said rollers therein. Each of the separation bars includes: a contact surface being formed by press-molding one of an outer diameter surface side end portion and an inner diameter surface side end portion thereof, and contacting with the rolling surface of the roller; and an expansion portion expanding to a radial direction of the bearing at the other of the outer diameter surface side end portion and the inner diameter surface side end portion which is not subjected to the press-molding.
A roller cage made of metal for holding rollers of a roller bearing, comprising:
A method for fabricating a roller cage for a roller bearing, said roller cage having separation bars separately defining a plurality of window holes along a peripheral direction of the bearing with a constant interval thereamong, each of said separation bars being formed in a substantially rectangular shape having an outer diameter surface and an inner diameter surface and a pair of side surfaces, said method comprising the steps of:
A roller bearing comprising a cage made of metal which has separation pillars arranged with a constant interval along a peripheral direction of said roller bearing to define a plurality of window holes between them therealong, wherein each of said separation pillars is formed with an outer diameter side surface, an inner diameter side surface and a pair of side surfaces, wherein at least one contacting surface for contacting a roller element is formed at each of the two side surfaces, wherein at least one extending portion which extends at least in a radial direction of said bearing is formed at one of said diameter side surfaces of said separation pillar, and said extending portion is free of contact relative to the roller element which is guided by the abutting window hole.
Dependencies are inferred from the claim text.