Nsk Corporation

Toshimi Takajo

Toshikazu Yabe

Takahiko Uchiyama

Fumio Ueki

Magozou Hamamoto

Koichi Goto

Takeshi Murakami

Toshihisa Ohata

Nariaki Aihara

Tsutomu Abe

Takashi Ogawa

Toru Tsukada

Yoshinori Tanaka

Soichiro Kato

Emiko Shiraishi

Michiharu Naka

Hiroshi Iwasa

Dai Kinno

Masao Yamamoto

Keisuke Yokoyama

Yasuhisa Terada

Yutaka Igarashi

Youichiro Sugimori

Hiroshi Narai

Norihiro Aoki

Takashi Nagato

Hiromitsu Asai

Yukio Ohura

Yasuhiro Nomura

Kenji Okuma

Magozo Hamamoto

Katsuhiro Ikezawa

Atushi Yokouchi

Akira Iwamoto

Kiyotoshi Ueda

Toshiro Kawamura

Takanori Yamada

Shigeaki Abe

Tosikazu Yabe

Takesi Murakami

A magnet portionof a magnetic encoderincludes a magnetic member and a resin, and a highly reliable magnetic encoderhaving a high magnetic property and enabling to detect a rotational number with high accuracy, and a hub unit bearinga are provided. Further, the resin is preferably a thermoplastic resin and further preferably includes a thermoplastic resin including a soft segment in a molecule. Further, the magnetic encoderfurther includes a fixed memberattached with the magnet portionand comprising a magnetic material, and the magnet portionand the fixed memberare bonded by an adhering agent including at least one of a phenolic resin based and an epoxy resin based.

Magnetic encoder and bearing

A magnet portionof a magnetic encoderincludes a magnetic member and a resin, and a highly reliable magnetic encoderhaving a high magnetic property and enabling to detect a rotational number with high accuracy, and a hub unit bearingare provided. Further, the resin is preferably a thermoplastic resin and further preferably includes a thermoplastic resin including a soft segment in a molecule. Further, the magnetic encoderfurther includes a fixed memberattached with the magnet portionand comprising a magnetic material, and the magnet portionand the fixed memberare bonded by an adhering agent including at least one of a phenolic resin based and an epoxy resin based.

The present invention provides a rolling bearing which comprises a retainer that can be used without any deformation at high temperatures and fairly assembled to bearing and thus can be used under severe working conditions such as high temperature, high rotary speed and high load over an extended period of time. A novel rolling bearing is provided comprising a retainer made of a resin composition having a flexural modulus of at least 3,500 MPa at 180&#xb0; C. and a heat-resistant temperature of at least 150&#xb0; C.

Rolling bearing

An electric power steering device having a resin gear used in a speed reduction gear mechanism and the resin gear used for the device are provided. The speed reduction gear mechanism includes a driven gear that is the resin gear integrally formed by fitting a resin part having gear teeth formed on the outer peripheral surface thereof to the outside of a metal core and a drive gear meshed with the driven gear. The resin part of the resin gear is formed of a resin composition having, as a base resin, a polyamide resin containing 10 to 50% by weight of glass fiber of 5 to 9 &#x3bc;m in diameter, and has excellent wear resistance, durability, and dimensional stability. Grease on the meshed surfaces of the gears has such a composition that includes a thickener and 3 to 10% by weight of a wax having a melting point or softening point in the range of 70 to 130&#xb0; C. in a base oil formed mainly of at least one oil selected from mineral oil, poly &#x3b1;-olefin oil, and alkyl polyphenyl ether.

Electric power steering device and resin gear used for the same

A hub unit including a hub and a flange integrally formed with the hub, and a seal including a core metal and an elastic body integrally molded with the core metal. The elastic body includes one or more lips in sliding contact with one or both of the hub and the flange. The elastic body includes a molded rubber, wherein the molded rubber contains, as a raw rubber, acrylonitrile/butadiene rubber having an acrylonitrile monomer content of from 26 to 36% by weight. In a first embodiment, the hub unit includes a hub adapted for receiving a shaft and a flange integrally formed with the hub, and the seal is attached to an outer circumference of the hub unit. In a second embodiment, the hub unit includes an inner ring having a raceway surface for receiving rolling elements and an outer ring. The seal seals the space between the inner ring and the outer ring. Furthermore, the seal includes a radial lip in sliding contact with an outer circumferential surface of the hub.

Seal

A rolling bearing with the sealing device which has a fitting groove and sealing device with a mounting portion. The fitting groove formed on the inner peripheral surface of an outer ring. An outside surface of the fitting groove tilts at 5 to 30 degrees with respect to an radial direction of the bearing. An inside surface of the fitting groove tilts at a tilt angle smaller than that of the outside surface. A total of these tilt angles is 35 degrees or more. The mounting portion has a base portion contacting the inside surface and a portion projecting toward the outside surface of the fitting groove from the base portion, and the mounting portion is thinnest at a front end portion of the projecting portion.

Rolling bearing with sealing device

The present invention provides a seal for rolling bearings having improved sealing properties, undergoing no separation between a core and a peripheral portion nor deformation even in long-term use. The seal comprises a flexible resin portion which comes into contact with an outer race and a rigid resin portion which is more rigid than the flexible resin portion, the rigid resin portion and the flexible resin portion being fusion bonded together into an integral body.

Seal for rolling bearing

An anti-electrolytic corrosion rolling bearing having at least an outer race, an inner race, and rolling elements interposed between the outer and inner races, which has an insulating body on at least one of the outer peripheral surface of the outer race, the inner peripheral surface of the inner race, and the side surfaces of the outer race and inner race, said insulating body being composed of an insulating film or insulating member each containing at least one of a thermoplastic synthetic resin, a rubber, and a thermoplastic elastomer as a base material and having a resistivity of not less than 1.times.10.sup.13 .OMEGA..multidot.cm and a thermal conductivity of not less than 0.5 W/m.multidot.K.

Anti-electrolytic corrosion rolling bearing

In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes: a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Sealing device for linear guide apparatus

In a seal for a rolling bearing, the seal has a molding member formed from a rubber material, the molding member including a lip portion, the molding member having 0.3 to 5.0 MPa of tensile stress at 10% strain and no less than 50% of elongation at break after the rubber material is subjected to an accelerated air aging at 130.degree. C. for 1000 hours. The rubber material includes the nitrile rubber compound containing a raw-material rubber, with respect to 100 weight parts of the raw-material rubber, 0.3 to 5.0 weight parts of an age resistor, and 0.3 to 5.0 weight parts of at least one secondary age resistor. The seal prevents grease enclosed in the rolling bearing from leaking out, the lip portion from being broken, and dust resistance from being lowered even in the case where the rolling bearing is used in a high-temperature environment.

Seal containing age resistors for rolling bearing

A rolling bearing includes an outer raceway, an inner raceway, a plurality of rolling elements interposed between the outer raceway and the inner raceway, and a cage for holding the rolling elements away from each other at the same interval in a rolling direction of the rolling elements, the cage including a first layer subjected to a surface treatment of at least one of carbonitriding, phosphating, sulfonitriding and gas soft nitfriding, and a second layer formed of at least one of PTFE, MoS.sub.2, WS.sub.2, Ag and Sn when the first layer includes a treated surface subjected to the surface treatment of phosphating. The rolling bearing can stabilize the attitude of the rolling elements and retain the ease of grinding them. At the same time, the dynamic torque of the rolling elements can be minimized while insuring to prevent the rolling elements from falling away from the cage.

Thrust needle-shaped roller bearing, rolling bearing, and cage of the

A cage for a rolling bearing; the cage is obtained by molding a resin composition comprising 100 parts by weight of a heat-resistant and oil-resistant resin and from 5 to 100 parts by weight of a polyolefin and immersing the resulting molded article in a lubricating oil. Also is disclosed is a rolling bearing with the cage fitted therein and having been subjected to oil plating.

Cage for rolling bearing

Growing community of inventors

Kanagawa, Japan

Toshimi Takajo