Ntn Corporation

Koji Sahashi

Kazuhiko Hozumi

Keisuke Sone

Masahiro Ozawa

Hisashi Ohtsuki

Akira Torii

Eiji Tajima

Koichi Okada

Mitsuru Umekida

Masayuki Kuroda

Nobuyoshi Yamashita

Motoharu Niki

Masuo Takaki

Yutaka Yamauchi

Syougo Suzuki

Masatoshi Mizutani

Takayuki Norimatsu

Shigeaki Fukushima

Hiroyoshi Ito

Hiroaki Ohba

Hiroyuki Ogura

Shinji Morita

Yoshiaki Kuchiki

Keizo Kobayashi

Eiji Funahashi

Ikuya Tateoka

Kenichi Suzumura

Tomohide Mizoguchi

An IC tag () capable of contactless communication is affixed on any one or more of element parts constructing the bearing device () for the wheel. For example, the IC tag is affixed on a forging forming an outer member () or an inner member (). The place of installation of IC tagis preferably chosen to be a surface of the forged component part which is not machined subsequent to forging.

Bearing device for wheel

To provide a wireless sensor system, in which an abnormal power supply in the power supply section can be ascertained, for avoiding a malfunction of the system and accomplishing a stable power supply with reduction of the consumption of a power being transmitted, the wireless sensor system includes wireless sensor units and a sensor signal receiving unit. The wireless sensor units include a sensor section for detecting a detection object, a sensor signal transmitting section for transmitting by wireless a sensor signal from the sensor section, and a power supply section having a power receiving section for receiving a driving power transmitted by wireless. In this system, a power supply monitoring section is provided for monitoring the voltage of the power supply section. The sensor signal receiving unit includes a monitor dependent power control section for regulating the power to be transmitted, depending on a monitored result of the power monitoring section.

Wireless sensor system and wheel support bearing assembly utilizing the same

A wireless sensor system of the present invention includes wireless sensor units (A,B) and a sensor signal receiving unit (). The sensor units (A,B) have sensors (A,B), an electric power receiver (A,B) for securing the electric power from an electromagnetic wave of a power feeding frequency fthrough a tuning circuit and a detecting and rectifying circuit, and sensor signal transmitters (A,B) for transmitting the signals outputted from the sensors as a wireless sensor signal of the electromagnetic wave of unique frequencies fand fdifferent from the power feeding frequency f. The sensor signal receiving unit () has an electric power transmitter () for transmitting the electromagnetic wave of the power feeding frequency fto the units (A,B) and a sensor signal receiver () for receiving wireless the sensor signals of the respective frequencies fand ftransmitted from the units (A,B).

Wireless sensor system and bearing assembly equipped with the same

A wheel bearing device is provided to prevent loosening of a hub ring and an outer joint ring that are fitted together. An irregular portion treated with hardening is formed on a fit face of the hub ring on an inside periphery of which the outer joint member is fitted. A low hardness portion of the outer joint member formed with hardness lower than that of the irregular portion is expanded in diameter to make it bite into the irregular portion. In this way the hub ring and the outer joint ring are unitized together.

Wheel bearing device and method of manufacturing the same

In a drive wheel bearing assembly, a fixed type constant velocity universal joint is coupled to a wheel bearing, mounted to one end of an intermediate shaft, and a sliding type constant velocity universal joint, is coupled to a differential, mounted to the other end portion of the intermediate shaft. One end portion of a stub shaft is connected to an inner joint ring of the constant velocity universal joint via torque transmission portions; one end portion of the intermediate shaft is connected to the other end portion of the stub shaft via torque transmission portions. A threaded portion is formed on an outer diameter portion of either the intermediate or stub shaft; a nut member threadedly engages the threaded portion; and a keeper ring is fitted into annular grooves formed on the outer diameter portion of the intermediate shaft or the stub shaft and an inner diameter portion of the nut member allowing the nut member to rotate, but not move axially.

Drive wheel bearing assembly

A tire wheel bearing apparatus comprises an outer member having multi rows of track surfaces integrally provided on an inner periphery, an inner member having a tire wheel mounting flange provided at one end thereof, a cylindrical small diameter step portion provided at another end thereof and double-rows of track surfaces formed on the inner wheels force fitted to the small diameter step portion so as to oppose to the track surfaces of the outer member, and double-rows of rolling elements respectively interposed between the track surfaces in the outer member and the inner member, the inner wheels being fixed to the inner member by radially outwardly caulking the end portion of the small diameter step portion of the inner member, the track surfaces in the outer member and the inner member and the rolling elements has a contact angle with a bearing clearance being set to be negative.

Tire wheel bearing apparatus

A bearing device for a drive wheel is provided with improved strength of coupling a hub wheel and an outer joint member without significantly raising the manufacturing cost. The bearing device for a drive wheel includes the hub wheel, a constant velocity universal joint and bearings arranged in inner races, the hub wheel, the universal joint and the bearings being unitized, at least the inner race being formed in the outer joint member of the constant velocity universal joint. In the bearing device, the hub wheel and the outer joint member are meshed with each other by way of serrations and coupled to each other by caulking. Undulations of serrations at near a caulked section being filled with plastic deformed part caused by the caulking.

Bearing device for drive wheel

In a bearing apparatus for a wheel in which a hub, a constant velocity universal joint and double rows of bearings are united and one inner raceway of double rows of inner raceways, of the double rows of bearings is integrally formed with an outer joint member of the constant velocity universal joint, a stem portion of the outer joint member is fitted to the hub, an unevenness portion is formed on an inner peripheral surface of the hub or an outer peripheral surface of the stem portion or both thereof, and the hub and the outer joint member are plastically connected by expanding the hollow stem portion from an inner diameter side to an outer diameter side by caulking. Accordingly, the fitted portions of the hub and the outer joint member are prevented from being loosened.

Bearing apparatus for wheel

A driving wheel bearing unit is disclosed which facilitates works including mounting and dismounting to/from a car body. The driving wheel bearing unit is set to satisfy Da&gE;Db, where Da is the diameter of its external member across a fitting surface thereof to be fitted to a mating member such as a knuckle, and Db is the maximum diameter of its constant velocity joint, so that a mounting bolt fixing the external member can be released to allow unitary extraction of the entire wheel bearing unit and the external member.

Driving wheel bearing unit

To provide a wheel support bearing assembly having a capability of detecting the number of revolutions of a wheel, having no risk of breaking of wire outside a vehicle body, capable of reducing the weight and cost of an automotive vehicle. This wheel support bearing assembly for rotatably supporting a wheel relative to a vehicle body structure includes an outer member having its inner periphery formed with plural rows of raceways and , an inner member having raceways and confronting respectively to the raceways and , and rows of rolling elements accommodated respectively between the raceways. An electric generator for generating an electric power as one of the outer and inner members and rotates relative to the other of the outer and inner members and . A signal indicative of the number of revolutions of the wheel outputted from the electric generator is transmitted wireless by mean of a wireless transmitting means A.

Wheel support bearing assembly and anti-skid brake device using the same

Wheel bearing apparatus

A hub unit bearing for automotive wheel comprises an outer joint member of constant velocity universal joint, an axle hub and an axle bearing assembled into one unit, the axle hub and the outer joint member being separably joined in a socket-and-spigot joint fashion, face splines being formed in opposing end surfaces of the axle hub and the outer joint member, one of double rows of inner raceways of the axle bearing being formed in the outer joint member, and quench-hardened layers of the inner raceways and quench-hardened layers of the face splines being formed continuously. A heat-affected zone incident to the quench-hardened inner raceway of the outer joint member may also be formed continuously with a heat-affected zone incident to quench-hardened ball grooves of the outer joint member.

Growing community of inventors

Iwata, Japan

Koji Sahashi