Ntn Corporation

Honda Motor Co., Ltd.

Katsufumi Abe

Shinji Oishi

Akihiko Katayama

Yugo Yoshimura

Noriaki Fujii

Keiko Yoshida

Yoshiyasu Nakano

Akio Kato

Tomoya Fujimoto

Takahiro Yamashita

Kiminori Komura

Hiroki Tsuchiyama

Kazuto Abe

Rino Fukami

Masanori Satou

Masanori Sato

Yasuaki Takahashi

Takahide Saito

Kazuyuki Yamamoto

Hisataka Hasegawa

Hideki Akamatsu

Masahiko Kataoka

Yasumasa Hibi

Masaru Kuroda

Hiromitsu Kawai

Hitoshi Murakami

Takashi Hattori

Toshiyuki Kobashi

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

An object of the present invention is to provide a chain guide superior in silence, which includes: a guide base extending in a traveling direction of a chain; a plurality of roller shafts attached to the guide base at an interval along the traveling direction of the chain; and rollers each rotatably supported by one of the roller shafts. The roller has a cylindrical outer circumferential surface for guiding the chain. The outer circumferential surface of the roller has a cylindricity not greater than 20 &#x3bc;m.

Chain guide and chain drive apparatus

A roller bearing () includes a plurality of needle rollers (), a cage () that retains the rollers (), and an outer ring () that has a rolling surface on which the rollers roll and is split in the circumferential direction. The cage () includes split sections (), () at which the cage can be split in the circumferential direction. The cage () is of a roller riding type or an inner land riding type.

Roller bearing and shaft support structure

A cam follower for a rocker arm includes a cylindrical outer ring () having an outer circumference surface abutting on a cam, a support shaft () to support the outer ring (), a plurality of rollers () arranged in an annular region between the support shaft () and the outer ring (), and a side plate () composed of a ring-shaped disk penetrated by the support shaft (), opposed to an end face () of the roller (), and having an outer diameter Ds smaller than an inner diameter Dr of the outer ring (). The side plate () is arranged at each end of the roller (), and a relationship Lr&#x3c;Lk+2t is satisfied in which Lk represents a shaft length of the roller (), Lr represents a shaft length of the outer ring (), and t represents a thickness of the side plate ().

Cam follower for rocker arm and cam follower device

A chain guide and a chain tensioner device using the chain guide. A roller, brought into contact with a chain, comprises a support shaft supported by an opposing guide base provided along the running direction of the chain, and roller bearings each having a steel outer ring on the outer peripheral surface of the support shaft so as to be brought into contact with the chain. The roller is also configured to be assembled by inserting opposite ends of the support shaft into support recesses on facing wall surfaces of the guide base. The roller has a vibration damping material between the support shaft and the support recess of each of the plate members.

Chain guide and chain tensioner device

A caged roller bearing includes a plurality of rollers and a roller retaining cage having pockets defined therein at circumferential locations thereof for accommodating the respective rollers therein. A nickel plating layer, which is a plated backing layer, is applied to the entire surface of the roller retaining cage, and an Ni&#x2022;PTFE plated layer, containing nickel and polytetrafluoroethylene, is applied to the surface of the nickel plating layer.

Caged roller bearing, caged roller bearing assembly, and cage

The present invention provides a timing chain drive device which has high mechanical strength of the timing chain contact surface and small sliding resistance, and which, even when being brought into contact with a timing chain running at high speed, is difficult to wear. A first chain guide and a second chain guide, which give tension to a timing chain so as to prevent the timing chain from being slackened, are arranged, and a plurality of rollers, each of which is supported by a rolling element, are arrayed in each of the first chain guide and the second chain guide so as to be brought into contact with the timing chain.

Timing chain drive device

An object is to reduce various losses occurring in a speed-reduction/differential gear apparatus for electric vehicles including a planetary-gear speed reducer and a differential device, thereby improving transmission efficiency of the driving force and increasing travel distance of the electric vehicle per battery charge. A speed-reduction/differential gear apparatus for electric vehicles includes a planetary-gear speed reducer and a differential device. A planetary gear mechanism in the speed reducer includes a speed-reducer-side carrier which has its inner diameter surface supported by a speed-reducer-side carrier support bearing. The invention provides proper mesh between in the pair of engaging teeth, leading to decrease in loss torque.

Reduction differential gear apparatus for electric vehicle

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 thrust roller bearing includes a plurality of rollers, a retainer, an annular first track ring having a track surface, an outer periphery flange part, and a first claw part, and an annular second track ring having a track surface, an inner periphery flange part, and a second claw part. Bearing internal gaps to allow the eccentric rotation of the first track ring and the second track ring are provided between the outer periphery flange part and an outer edge part of the retainer, and between the inner periphery flange part and an inner edge part of the retainer. In addition, at least one of the first and second claw parts is a projection part formed by a bending process. Furthermore, an edge part of the retainer opposed to the projection part has a first slope part formed at a corner part on the side opposed to the track surface, and a second slope part having a radial length relatively shorter than that of the first slope part, and formed at a corner part on the opposite side in a thickness direction.

Thrust roller bearing and torque converter

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

Needle roller bearing includes an outer ring having first outer ring member having center angle larger than 180&#xb0; and second outer ring member having center angle smaller than 180&#xb0;, needle rollers, a retainer having ring section pairs and column sections arranged between the pair of ring sections, d&#x3c;X&#x3c;D and the formula below are satisfied wherein D represents the outer ring inner diameter, r represents a needle roller radius, d represents the retainer outer diameter, and X represents a line segment length lconnecting circumferential ends of an inner diameter surface of the first outer ring member. When line lpassing through the center of the outer ring and parallel to segment lpasses through the column section, &#x3b8; represents an angle between lines land lconnecting the center of the needle roller adjacent to the column section to the center of the outer ring, 

Needle roller bearing and crankshaft support structure

A roller bearing includes an outer ring formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction and a plurality of rollers arranged along an inner diameter surface of the outer ring. A slope surface () is provided at one or each circumferential end on an inner diameter surface of the outer ring member (), and a contour line of the slope surface () is along a direction perpendicular to a revolution direction of the roller.

Roller bearing, camshaft support structure, and internal combustion engine

Provided are a gear in which oil film formation between the tooth surfaces of gears rotating at high speed can be effected to a sufficient degree, in which generation of pitting, abrasion, and scoring is prevented, and which helps to prevent an increase in temperature and wear to achieve an improvement in durability, and a gear drive unit. A multitude of minute concave recesses are provided at random on a tooth surface, and an average area of the recesses is set to a range of 160 to 740 &#x3bc;m. Accordingly, the tooth surface can obtain a high oil film forming capacity. Thus, even under a low-viscosity/thin-lubrication condition in which the thickness of the oil film is extremely small, it is possible to achieve a long service life.

Gear and gear drive unit

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.

Growing community of inventors

Iwata, Japan

Katsufumi Abe