Nsk Corporation

Nabtesco Corporation

Makoto Koganei

Shunichi Kiyono

Mamoru Aoki

Hiroshi Sakamoto

Daisuke Tominaga

Masayoshi Nakamura

Kiyoshi Yamamoto

Hidenobu Magami

Masateru Kondo

Tatsuya Minamiyama

Hidekazu Yoshiwara

In a tapered roller bearing, neighboring pillar parts constitute a first engagement allowance in which an inner diameter-side opening width of each of the pockets becomes smaller than a roller diameter at a position of the opening width in a direction of a rotation axis of each of the tapered rollers at at least a part of an inner diameter side of each of the pockets, and constitute a second engagement allowance in which an outer diameter-side opening width of each of the pockets becomes smaller than the roller diameter at a position of the opening width in the direction at at least a part of an outer diameter side of each of the pockets. Bumps are formed on an inner surface of the small diameter ring part in the pockets. Small diameter-side end faces of the tapered rollers facing the bumps are substantially flat surfaces.

Tapered roller bearing and manufacturing method for tapered roller bearing

A tapered roller bearing () is includes an outer ring () having an outer ring raceway surface () on the inner peripheral surface thereof, an inner ring () having an inner ring raceway surface () on the outer peripheral surface thereof, and a plurality of tapered rollers () arranged in a rollable manner between the outer ring raceway surface () and the inner ring raceway surface (). A large flange () is formed on an end portion of the inner ring () on a large-diameter side of the inner ring, and the inner ring raceway surface () continuously extends to the end face () of the inner ring () on a small-diameter side of the inner ring. The contact angle (&#x3b1;) is 37&#xb0;30' to 50&#xb0;. In this manner, the tapered roller bearing having high moment rigidity and long life can be provided.

Tapered roller bearing

Provided is a resin cage for a tapered roller bearing in which a mold parting line which is extended in an axial direction is formed in a pillar portion defining a pocket. On facing surfaces of adjacent pillar portions, on an outer diameter side from the mold parting line, a first conical surface which slides in contact with an outer peripheral surface of a tapered roller is formed, and a first flat surface in a radial direction is formed in a portion on the outer diameter side from the first conical surface. On an inner diameter side from the mold parting line, a second conical surface which slides in contact with the outer peripheral surface of the tapered roller is formed, and a second flat surface in a radial direction is formed in a portion on the inner diameter side from the second conical surface.

Resin cage for tapered roller bearing and tapered roller bearing including the resin cage

Tapered roller bearing cage

Growing community of inventors

Fujisawa, Japan

Makoto Koganei