Ntn Corporation

Honda Motor Co., Ltd.

Yugo Yoshimura

Shinji Oishi

Katsufumi Abe

Noriaki Fujii

Keiko Yoshida

Akihiko Katayama

Tomoya Fujimoto

Yoshiyasu Nakano

Kiminori Komura

Hiroki Tsuchiyama

Kazuto Abe

Katsuaki Sasaki

Takahiro Wakuda

Kazunori Inamasu

A sealed bearing assembly includes seal members each including a seal lip with multiple protrusions, and being arranged such that oil passages are defined between the seal lip and a seal sliding surface which is configured to slide circumferentially relative to the protrusions such that the oil passages communicate with a bearing internal space and an exterior of the bearing, and prevent passage of foreign objects having particle diameters larger than a predetermined value therethrough. The seal lip and the seal sliding surface are arranged such that, when the bearing rotates, lubricating oil in the oil passages is pulled into spaces between the seal lip and the seal sliding surface such that a fluid lubricating condition is created between the seal lip and the seal sliding surface, due to a wedge effect.

Sealed bearing assembly

A positioning protrusionis provided in a center of an outer diameter surface of a halved outer ringin both circumferential and axial directions. The positioning protrusionis configured to engage with a housing, which is placed on an outer diameter side of the halved outer ring, to position the halved outer ringwith respect to the housing. A protruding portionand a recessed portionare provided in each abutting portionswhere a pair of the halved outer ringsabut on each other when fitted on a rotary shaft that is supported by a roller bearing. The protruding portionand the recessed portionare configured to mesh with each other to restrict axial movement of both halved outer rings. The protruding portionand the recessed portionare point-symmetric with respect to a centerof the positioning protrusion

Halved outer ring, roller bearing, and rotary support structure

A roller bearing retainer () includes a pair of annular ring parts () and a plurality of column parts () each including a column center part () provided in an axial center region so as to be positioned relatively on the radial inner side, a pair of column end parts () provided in axial end regions so as to be positioned relatively on the radial outer side, and a pair of column sloped parts () positioned between the column center part () and the pair of column end parts (), and connecting the pair of ring parts to each other. A thickness of each part of the column center part, the pair of column end parts, and the pair of column sloped parts is smaller than a thickness of a boundary part between the adjacent parts.

Roller bearing retainer and needle roller bearing

A needle roller bearing () as a roller bearing comprises an outer ring () having a plurality of outer ring members () and () split by a split line extending in the axial direction of the bearing, and a plurality of needle rollers () arranged along the track surface of the outer ring (). The outer ring member () is in the form of a semicircular shape having a center angle of 180&#xb0; and has an engagement click () bent from one circumferential side end to the radial outer side. The two outer ring members () and () are connected in the circumferential direction to form the annular outer ring ().

Roller bearing, cam shaft support structure, internal combustion engine,  and incorporation method of roller bearing

A needle roller bearing () as a roller bearing comprises an outer ring () formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction, and a plurality of needle rollers () arranged along the inner diameter surface of the outer ring (), and an oil groove () extending in a circumferential direction so as to contain a position opposed to an opening () of an oil path of a housing is formed in the outer diameter surface of the outer ring member.

Roller bearing, camshaft support structure, and internal combustion engine

A needle roller bearing comprises an outer ring having a plurality of outer ring members split by a parting line extending in the axial direction of the bearing, a plurality of needle rollers rotatably arranged on the raceway surface of the outer ring, and a retainer retaining the plurality of needle rollers. A curvature radius rof the outer ring member and a curvature radius rof the outer diameter of the retainer has a relation such that 1&#x3c;r/r&#x3c;1.3.

Needle roller bearing and bearing structure

A needle roller bearing comprises an outer ring having a plurality of outer ring members split by split lines extending in an axial direction of the bearing, a plurality of needle rollers arranged on an orbit surface of said outer ring so that they can roll thereon, and a cage holding the needle rollers at intervals. The outer ring member has a projection serving as a positioning engaging part which engages with a housing for positioning, and an engaging click protruding from an axial end of the outer ring member inward along a diameter to prevent the cage from moving in an axial direction, in positions shifted from its circumferential center.

Needle roller bearing

A needle roller bearing comprises an outer ring having a split part in a circumferential direction, a plurality of rollers which can roll along an inner diameter surface of the outer ring, and a cage holding the plurality of rollers. The outer ring has an engaging click protruding inward along a diameter at a width-direction end thereof to prevent the cage from moving in an axial direction.

Growing community of inventors

Iwata, Japan

Yugo Yoshimura