Koyo Seiko Company, Ltd.

Jtekt Corporation

Other

Sharp Kabushiki Kaisha Corporation

Koyo Sealing Techno Co., Ltd.

Kazutoshi Toda

Shinichirou Kashiwagi

Tadashi Mitarai

Tomohiro Ishii

Hiroki Matsuyama

Daisaku Tomita

Naoki Morimura

Minoru Sentoku

Nobuyoshi Murakami

Kouji Kawaguchi

Naoki Masuda

Hiroyuki Ohshima

Hiroyuki Chiba

Kenji Takahashi

Hirokazu Arai

Yoshifumi Shige

Nobuyuki Seo

Motoshi Kawamura

Teruyuki Kawatani

Hirofumi Dodoro

Kanichi Kouda

Teruyuki Wakisaka

Hiroshi Ueno

Masahiro Inoue

Shigeo Kamamoto

Masashi Hattori

Fumiaki Kasahara

Kiyoshi Ogino

Fujio Harumi

Yuzuru Takahashi

Masaru Deguchi

Koji Kawaguchi

Masahiro Harada

Shinichi Obayashi

Junji Murata

Toshiyuki Saito

Kazuyoshi Yamakawa

Masao Goto

Kazuya Suzuki

Kazuhisa Kajihara

Michiru Ueda

Shinya Matsuda

Liming Lou

Naoto Araki

Satoshi Hashimoto

Shinya Ochi

Tomohiro Haruta

Yoshio Tateishi

Alexei Vinogradov

Koshiro Yamakawa

Tomomitsu Tamura

Makoto Miyazaki

Noboyuki Seo

A liquid lubricating tapered roller bearing device, includes: an outer ring; an inner ring including an outer end surface at a smaller diameter side; tapered rollers; and a cage located further inside in an axial direction than the outer end surface of the inner ring and including an end portion at a smaller diameter side, the end portion defining an outer end surface and an inner periphery. Inequalities X/B&#x2267;0.010 and 0.009&#x2266;X/D&#x2266;0.043 are satisfied where B represents a width in the axial direction of the inner ring; D represents a bore diameter of the inner ring; Xrepresents a distance in the axial direction from the outer end surface of the inner ring to the outer end surface of the case; and Xrepresents a dimension of a clearance in a diameter direction between the inner periphery of the cage and the inner ring.

Liquid lubricating tapered roller bearing device

A tapered roller bearing includes an outer ring, an inner ring, a plurality of tapered rollers interposed between the outer ring and the inner ring, and a cage for the tapered rollers. Ra is smaller than Rb where Ra represents a radius of curvature of a large end face of the tapered roller and Rb represents a radius of curvature of an end face of a large rib portion of the inner ring.

Tapered roller bearing, tapered roller bearing apparatus, and automotive pinion shaft supporting apparatus utilizing same tapered roller bearing apparatus

An AE detector has an AE sensor and a destruction judging section. The destruction judging section judges it as a warning of destruction of a bearing when there are a predetermined number or more of points defined by parameters calculated based on signals from the AE sensor in a predetermined region of a parameter space defined by a plurality of parameters which can be created based on the signals from the AE sensor.

Acoustic emission detector and controller

A bearing apparatus includes: two split outer ring halves which are mounted to the housing; a plurality of rolling elements which are provided so as to roll on the two split outer ring halves; and a cage which holds the rolling elements such that the rolling elements are disposed at substantially equal intervals in a circumferential direction of the cage and which is split at a position of the cage to form joint surfaces, an outside diameter of the cage being guided by inner circumferential surfaces of the split outer ring halves. An outside diametrical dimension in a normal direction to the joint surfaces is made larger than an outside diametrical dimension of the cage in a direction parallel to the joint surface, and vicinity of an outside diametrical position of the cage lying in the normal direction is made to be guided by the outer ring halves.

Bearing apparatus

A tapered roller bearing according to the invention is such that when an arithmetical mean roughness as a surface roughness of a large end face of a tapered roller is &#x3c3;1 and an arithmetical mean roughness as a surface roughness of a large rib surface of an inner ring is &#x3c3;2, &#x3c3;1 is 0.04 &#x3bc;m or larger, and

Tapered roller bearing and automotive pinion shaft supporting apparatus utilizing same tapered roller bearing

In a tapered roller bearing, LWR/DW is in the range of 1.1 to 1.7 where LWR represents a roller effective length of tapered rollers and DW represents a roller mean diameter of tapered rollers. RCO/LRO is 30 to 150, and RCI/LRI is 50 to 260 where RCO represents a crowning radius of an outer ring, LRO represents a raceway length of the outer ring, RCI represents a crowning radius of an inner ring and LRI represents a raceway length of the inner ring. The following expressions are satisfied: 20&#xb0;&#x2266;&#x3b1;&#x2266;30&#xb0;, and &#x3b1;&#x2212;0.87&#x3b3;&#x2212;0.334&#x2266;BK&#x2266;&#x3b1;&#x2212;0.87&#x3b3;&#x2212;0.167, where &#x3b1; represents a raceway angle of the outer ring, &#x3b3; represents a roller angle of the tapered rollers, and BK represents a rib angle of a large rib portion of the inner ring.

A bearing device is provided with a bearing ring and a shaft body that is made of carbon steel including pearlite having a cementite layer structure, and has an end portion caulked onto the bearing ring, and in this device, at least in the end portion of the shaft body, the layer gap of the cementite in the pearlite is made greater.

Bearing device and method of manufacturing the bearing device

A tapered roller bearing is designed to have a roller loading ratio in the range of 0.7 to 0.92 and a ratio of roller length to roller diameter in the range of 1.1 to 1.7 whereby oil agitation loss and rolling viscous resistance are reduced for achieving the reduction of running torque. Crownings are provided which are designed to have an outer-ring crowning parameter (=RCO/LRO) in the range of 30 to 150 and an inner-ring crowning parameter (=RCI/LRI) in the range of 50 to 260, provided that RCO denotes the radius of an outer ring crowning, LRO denotes the raceway length of an outer ring, RCI denotes the radius of an inner ring crowning and LRI denotes the raceway length of an inner ring. Thus, the rolling viscous resistance is reduced for achieving the reduction of running torque.

Tapered roller bearing, a tapered roller bearing assembly and a pinion-shaft supporting assembly using the same

A shielding plate for controlling the entry of oil between an inner ring and an outer ring is provided in the vicinity of an opening between the inner ring and the outer ring which lies a side where oil enters. In addition, a fluid accommodating plate for accommodating therein oil is provided in the vicinity of an opening between the outer ring and the inner ring which lies on a side where oil exits.

Fluid-lubricated type tapered roller bearing device and vehicle pinion shaft supporting assembly

A tapered roller bearing according to the invention is such that the surface hardnesses of a raceway surface of an inner ring and rolling contact surfaces of tapered rollers are set to 63 to 69HRC. In addition, respective raceway surfaces of an outer ring and the inner ring and the rolling contact surfaces of the tapered rollers are crowned and are set such that a total crowning amount is 50 &#x3bc;m or larger, an outer crowning rate is 40% or larger and a roller crowning rate is 20% or smalled.

Tapered roller bearing an automotive pinion shaft supporting apparatus utilizing same tapered roller bearing

According to the invention, there is provided a tapered roller bearing in which, where D represents a larger end diameter of the tapered roller and L represents a roller length thereof, the roller length L is 18 mm or smaller, and a ratio of the large end diameter and the roller length of the tapered roller which is expressed by D/L is in the range of 0.55 to 0.9. In addition, respective raceway surfaces of the outer ring and the inner ring and rolling contact surfaces of the tapered rollers are crowned, and a total crowning amount is set to be 50 &#x3bc;m or larger, an outer ring crowning rate is set to be 40% or larger, and a roller crowning rate is set to be 20% or smaller.

An end faced on an outer side in a radial direction of a small diameter annular portion of a retainer is disposed on an inner side in a radial direction of a pitch conical face of a taper roller and an end face on an inner side in a radial direction of a large diameter annular portion is disposed on an outer side in the radial direction of the pitch conical face. Further, a portion of the small diameter annular portion opposed to a small diameter end face of the taper roller is disposed on the inner side in the radial direction of the pitch conical face and a portion of the large diameter annular portion opposed to a large diameter end face of the taper roller is disposed on the outer side in the radial direction of the pitch conical face.

Taper roller bearing

A vehicle-use bearing apparatus including a hub wheel formed of steel material to which a wheel is mounted and a rolling bearing mounted to an outer periphery of the hub wheel. An end portion of the hub wheel is expanded radially outward toward an inner ring provided to the rolling bearing to be formed into a caulked portion and a percentage of sulfur content is adjusted to be 0.020% by weight or less in steel material of which the 10 caulked portion is formed.

Vehicle-use bearing apparatus

A tapered roller bearing includes: an outer race including an outer raceway surface; an inner race including an inner raceway surface and a larger collar surface which is a concave curved surface; and tapered rollers provided between the outer and inner races, each of the tapered rollers including a tapered surface and a larger end surface which is a convex curved surface communicating with the tapered surface and corresponds to the larger collar surface.

Tapered roller bearing and final reduction gear

A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.

Seal ring, sealing apparatus and bearing apparatus

Growing community of inventors

Tondabayashi, Japan

Kazutoshi Toda