Nsk Corporation

Hironari Sakoda

Takashi Murai

Shinichi Natsumeda

Masamitsu Watanabe

Akinobu Takayama

Yasuhiro Shiono

Masayoshi Tanahashi

An outer ring () is provided with a stationary ring-side flange () along a circumferential direction. The stationary ring-side flange () is provided with a plurality of mounting holes () which is arranged at unequal intervals and which is used to fasten the outer ring () to a knuckle (N) through knuckle bolts (Bt). The stationary ring-side flange () includes first flange part () located in a region in which a distance between adjacent mounting holes () is larger and second flange part () located in a region in which a distance between adjacent mounting holes () is smaller. A radial thickness of the first flange part () is a greater than a radial thickness of the second flange part ().

Bearing unit

A structure which ensures a movement of a seal lip disposed in a seal lip is realized by preventing foreign matters from permeating a seal internal space between a slinger and a seal ring. A labyrinth seal is disposed between an outer peripheral edge of a rotary side annular portion configuring the slinger and an inner peripheral surface of a stationary side cylindrical portion of a metal insert configuring the seal ring. In addition, a thickened portion is formed in a portion of an elastic member configuring the seal ring over an entire periphery. An auxiliary seal lip whose rigidity is lower than that of respective seal lips is disposed in the thickened portion over the entire periphery. The auxiliary seal lip prevents the foreign matters from adhering to the seal lip, and prevents the movement of the seal lip from being hindered.

Rolling bearing unit with combination seal ring

A radial roller bearing has: an outer ring; an inner ring; and, a cylindrical roller interposed between the outer ring and the inner ring, the outer and inner rings respectively including flange portions formed in the end portions thereof so as to be opposed to the end face of the cylindrical roller, wherein, in the end face of the cylindrical roller, there is formed a circular-ring-shaped contact portion of the roller end having centers of curvature continuously existing on a circle which lies on a plane parallel to the end face of the cylindrical roller and also the center of the circle is on the rotation axis of the cylindrical roller.

Growing community of inventors

Fujisawa, Japan

Hironari Sakoda