Jtekt Corporation

Ikuo Ito

Kunihiro Yamaguchi

Youichi Numada

Tsuyoshi Okumura

Yoshitaka Nakagawa

Hirofumi Dodoro

Komatsugu Nishimura

Hajime Tadumi

An axial lip is formed on a side surface of a seal of a rolling bearing which faces a slinger so as to expand outwards of the bearing. A projecting portion is formed on a flat surface of the slinger which faces the seal by flexing the slinger in an axial direction so as to cause the slinger to project inwards of the bearing, and a distal end of the axial lip is brought into contact with the flat surface of the slinger in a position lying further radially outwards than the projecting portion on the slinger. A radially inward inner surface of the axial lip of the axial lip and a radially outer side sloping surface formed radially outwards of the projecting portion on the slinger form a labyrinth, and a portion of the side surface of the seal which lies further radially inwards than the position where the axial lip is formed and an apex portion of the projecting portion on the slinger form a labyrinth.

Rolling bearing sealing device

In a sealing device for a bearing, a sub-seal lip is configured such that a slide contact surface is formed like an annular band. As the rotation speed of the bearing increases, the width of the slide contact surface is reduced by a centrifugal force. Thus, sliding friction can effectively be minimized. The torque of the bearing can be prevented from increasing at high-speed rotation. Even when the centrifugal force increases somewhat, only reduction in the width of the slide contact surface is caused. Thus, a slide-contacted state can be maintained. Consequently, the problem of floating-up of the sub-seal lip from a slinger is difficult to occur.

Sealing device for bearing

The rolling bearing includes an inner ring, and an outer ring which is arranged in a concave part which is formed in a fixing member so as not to rotate in a state preloaded in an axial direction toward the inner ring by way of a rolling element, with the fixing member at a bottom surface of the concave part. Moreover, a vibration isolating part formed of a laminated body including a pair of metal layers and a resin layer which is thinner than these metal layers and interposed between them is press clamped to be disposed between an end surface of the outer ring at a preloaded side in the axial direction and the bottom surface of the concave part, in such a manner that a direction of lamination may coincide with the axial direction.

Rolling bearing device

Growing community of inventors

Toyota, Japan

Ikuo Ito