Minebea Company, Limited

Keihin Corporation

Akimi Furukoshi

Toshisada Koyama

Yutaka Daikuhara

Hiroyuki Yajima

Takuya Usami

Tomoaki Ohba

Kenichiro Nishimura

Mineo Oyama

The sealing performance against positive and negative pressures is increased and sufficient air tightness against pressure fluctuations is maintained in a rolling bearing having a sealing function. Seal members are provided on both ends of a bearing. The seal members include a metal core and an elastic body, and are fixed to an outer ring. Outside and inside lip parts of the seal members contact an outer peripheral surface of an inner ring. When a positive pressure acts on the outside of the seal member, the outside lip part is pressed to the outer peripheral surface of the inner ring, and the air tightness is maintained. When a negative pressure acts, the inside lip part is pressed to the outer peripheral surface of the inner ring by the differential pressure between the outside and inside of the rolling bearing, and the air tightness is also maintained.

Rolling bearing, throttle valve apparatus, and anti-lock brake system

A seal lip having: a cylindrical seal surface in close contact with an outer peripheral surface of an inner race with outer side and inner side surfaces standing upright respectively from an outer end and an inner end of the seal surface and reaching a lip supporting portion of a seal member, and protruding on an inner peripheral surface of the lip supporting portion. The outer side surface is a perpendicular surface standing upright from the outer end of the seal surface in a direction perpendicular to a generating line of the outer peripheral surface of the inner race. The inner side surface includes: a perpendicular surface standing upright from the inner end of the seal surface in parallel with the outer side surface; and a conical surface inclined toward the outer side surface extending outward in a radial direction from an outer peripheral end of the perpendicular surface.

Rolling bearing with seal

The freedom of the resilient deformation of the claws is controlled by changing the configuration (diameter and depth) of the cylindrical cut out portion of the bearing retainer . And, the necessary force to push and widen the claws is optimized, thereby, it is avoided to damage the ball at the time of setting the ball in the pocket

Bearing retainer

The present invention provides a bearing device reliable of shielding any material or fluid from moving between a fluid passage within a fluid system housing and an outside of the housing. In the above bearing device, a roller bearing (,) equipped with sealing plates (,) is fitted into a coupling bore (,) in an intake pipe (,) serving as the housing so that the roller bearing (,) can bear a shaft (,) of a butterfly valve disposed in a fluid passage (,) within the intake pipe (,). The outer race (,) and the inner race (,) of the roller bearing (,) are formed with annular grooves (,), respectively, and O-rings (,) are engagingly arranged on the interior of the annular grooves (,), respectively. With the bearing device having this structure, the O-rings (,) can prevent air, etc. from permeating into the intake passage (,) even though clearance (a, b) occurs in the engaged sections due to a dimensional error, difference in thermal expansion, etc.

Growing community of inventors

Kitasaku-gun, Japan

Akimi Furukoshi