Ntn Corporation

Masuo Takaki

Eiji Tajima

Akira Torii

Hisashi Ohtsuki

Motoharu Niki

Kazuhiko Hozumi

Masahiro Ozawa

Keisuke Sone

Shigeaki Fukushima

Masayuki Kuroda

Nobuyoshi Yamashita

Koji Sahashi

Yutaka Yamauchi

Kazunari Yamamoto

Tomoaki Makino

Takashi Nozaki

Kazuhiro Azuma

Yutaka Tanigaki

Naoshi Kinpara

Takeshi Ikeda

Shin Tomogami

Syougo Suzuki

Kenji Terada

Yoshikazu Fukumura

Sadako Takada

A wheel bearing apparatus has an outer member, an inner member and double row rolling elements. A pulser ring is fit onto the inner ring. A second cap is fit on the inboard-side end of the outer member. A rotational speed sensor is mounted on the second cap. A cup-shaped first cap is press-fit into the inner circumference of an inboard-side end of the outer member. The first cap has a cylindrical fitting portion press-fit into the outer member. A disk portion extends radially inward from the fitting portion. The sensor abuts the disk portion. The second cap is press-fit into the inner circumference of an inboard-side end of the outer member via a predetermined interference.

Wheel bearing apparatus

A wheel support bearing assembly includes an outer member and a hub axle having a wheel mounting flange and a raceway surface. The angle of the fiber flow relative to the raceway surface in the hub axle is chosen to be equal to or smaller than 15&#xb0;. The angle of the fiber flow relative to a raceway surface of the outer member is also chosen to be equal to or smaller than 15&#xb0;.

Wheel support bearing assembly

There is provided a wheel support bearing assembly () utilizing a dual row angular ball bearing. The bearing assembly () includes two ball retainers () for retaining corresponding rows of balls (). One or both of the retainers () is so designed that the neighboring balls () can adjoin directly in a non-contact fashion relative to each other on a pitch circle PCD of the row of the balls (). For example, the ball retainer () is of a generally comb-shape having a plurality of pillars () each formed with a throughhole () aligned on the pitch circle PCD.

Wheel support bearing assembly and angular ball bearing

To provide an electrically powered brake system capable of performing a control of the braking force appropriate to a particular wheel rotational speed with high response and capable of being simplified in structure with no need to employ any hydraulic equipment and the related pipe lines, the electrically powered brake system includes an actuating unitincluding a brake wheelmounted on a vehicle wheeland brake piecesfrictionally engageable with the brake wheel. A drive unitis operable to translate a rotary output of an electric drive motorinto a rectilinear reciprocating motion by means of a ball screw mechanism, which rectilinear reciprocating motion is transmitted to the brake piecesas a braking force. An operating unitis operable to control the electric drive motoraccording to manipulation of an operating membersuch as, for example, a brake pedal. An anti-skid control deviceis provided for regulating the braking force, exerted by the electric drive motor, in dependence on the number of revolutions of the vehicle wheelduring a braking effected by manipulation of the operating member. For a rotation detectorfor detecting the number of revolutions of the vehicle wheel, the rotation detectorincluding a magnetic encoderis employed.

Electrically powered brake system

A reliable brake rotor and wheel bearing assembly are proposed which make unnecessary adjustment of runout of brake rotor at the customer's factory. For runout of each of the mounting surface and back of the brake rotor itself, and runout of the side of the wheel mounting flange of the inner member to which is mounted the brake rotor, the maximum difference between the peaks of crests and troughs in each period of surface runout is restricted within a standard value, and the brake rotor is mounted to the wheel mounting flange, thereby eliminating the necessity of mounting of the brake rotor and adjustment of runout after mounting at the customer's factory to provide a reliable automotive wheel bearing assembly.

Brake rotor and wheel bearing assembly having maximum acceptable runout variation

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 wind driven electrical power generating apparatus includes a rotor rotating by receiving wind force, a gear assembly having an input shaft connected to the rotor, a generator connected to an output shaft of the gear assembly, a sensor for detecting generating capacity of the generator and a controller for varying gear ratio of the gear assembly based on a signal from the sensor. In this construction, the controller controls so that the generator keeps rotating at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a maximum power operation region of the generator. Alternatively, the controller controls so that rotational speed of the output shaft of the gear assembly is adjusted to at around the lowest rotational speed within a range of rotational speed, the range being determined so as to include a rated power region as an upper operational limit.

Wind driven electrical power generating apparatus

A wheel bearing assembly is provided which can prevent lowering of the life of a bearing assembly due to entry of muddy water into the bearing assembly through a gap between fitting surfaces of a first inner member and a second inner member. These members are rotatably supported by mounting rolling elements between double-row raceways formed on an inner peripheral surface of an outer member and raceways formed on outer peripheral surfaces of the first and second inner members. A stem formed on the second inner member is inserted into a hole formed in the first inner member, and a tip of the stem is caulked to hold the first and second inner members in a coupled state. An annular groove is formed in an outer periphery of the stem. A seal ring is mounted in the annular groove.

Wheel bearing assembly

Brake rotor and wheel bearing assembly

A boot fixing portion (12) has an annular convex portion (17) integrally formed on the outer periphery thereof and an annular projection (19) integrally formed on the inner periphery thereof in opposed relation to the convex portion (17), the annular projection (19) being adapted to engage an engaging groove (18) formed in the outer periphery of the outer member (14) of a constant velocity joint (13).

Cylindrical boot fixing portion of resin boot with annular exterior

Growing community of inventors

Osaka, Japan

Masuo Takaki