Ntn Corporation

Naoshi Hattori

Kazuo Komori

Takahide Saito

Tatsuo Kawase

Takayuki Norimatsu

Hisashi Ohtsuki

Hiroshi Kawamura

Tomoaki Makino

Kyohei Sasanuma

Takashi Nozaki

Yasuhiro Aritake

A spool valve includes a spool in a spool insertion hole defined in a valve body. The spool is configured to be moved by an electric motor via a ball-screw to a first position where an input port is in communication with an output port, while the output port is not in communication with a drain port, and to a second position where the input port is not in communication with the output port, while the output port is in communication with the drain port.

Spool valve

A wheel support bearing assembly includes an outer member having an inboard end formed with a knuckle mount defined in an outer periphery thereof for engagement with a knuckle of an automotive suspension system, and also having an inner periphery formed with a plurality of raceway surfaces, in which the raceway surfaces in the outer member on the inboard side are in their entirety or partly held in overlapping relation within an axial range in which the knuckle mount is defined; an inner member having an outer periphery formed with raceway surfaces cooperable and aligned with the raceway surfaces in the outer member and also having a wheel fitting flange provided in an outboard end of the outer periphery thereof; and rows of balls interposed between the raceway surfaces in the outer member and the raceway surfaces in the inner member, respectively.

Wheel support bearing assembly

A vehicle wheel bearing apparatus has an outer member, an inner member, double row rolling elements freely rollably contained between outer and inner raceway surfaces of the outer and inner members, and seals mounted within annular openings formed between the outer and the inner members. A backup seal is arranged radially outward of an outer side seal of the seals. The backup seal has a sealing lip inclined radially outward toward the outer side. The sealing lip slidingly contacts an annular metal member that is pressed from a steel sheet having preservation properties. The annular metal member is bolted on a side face of the wheel mounting flange of the inner side.

Wheel bearing apparatus for a vehicle

A wheel support bearing assembly including an outer member having an inner periphery formed with a plurality of raceway surfaces; an inner member having an outer periphery formed with raceway surfaces cooperable and aligned with the raceways in the outer member; rows of balls interposed between the raceway surfaces in the outer member and the raceway surfaces in the inner member, respectively; and a wheel fitting flange provided in the outer periphery of one of the outer and inner members. In the wheel support bearing assembly, the diameter of the pitch circle depicted by the balls of a row on an outboard side is greater than the pitch circle of the balls of the row on an inboard side, and the ratio of the diameter of the balls relative to the pitch circle diameter of the row of the balls on the inboard side is within the range of 0.14 to 0.25.

A wheel support bearing assembly, in which the rigidity of an outboard portion thereof can be increased without increasing the weight of the bearing assembly. The wheel support bearing assembly includes outer and inner members and inboard and outboard rows of rolling elements interposed between outboard and inboard raceways defined in the outer and inner members confronting each other. The inner member includes a hub axle having a wheel fitting flange on an outboard side thereof, and an inner race member mounted on an inboard end thereof. The hub axle has an outer diameter measured at a point intermediate between the inboard and outboard rows of rolling elements that is greater than the minimum diameter of the raceway on the inboard side. A pitch circle diameter of the outboard row of rolling elements is greater than the pitch circle diameter of the inboard row of rolling elements.

A hub unit bearing assembly includes a tapered roller bearing including an inner race (3), an outer race (4) having a fixture (4a) defined therein so as to extend radially outwardly therefrom, and a multiplicity of rollers (5) retained in a circumferential row by a cage (6) and rollingly positioned between the inner race (3) and the outer race (4). A hub (2) including the inner race (3) on a portion of an outer periphery of said hub (2). The inner race (3) is a member either integral with the hub (2) or separated from the hub (2). The cage (6) rotatably accommodates the respective rollers (5) in the form as retained thereby prior to assemblage of the cage (6) with the rollers (5) into the roller bearing. The cage (6) and the rollers (5) are, after the rollers have been mounted in the cage (6), inserted in between the inner race (3) and the outer race (4).

Hub unit bearing assembly and a method of making the same

Friction type continuously variable transmission

A frictional type continuously variable transmission having a continuously variable transmission unit with a planetary gear unit attached thereto to increase the speed ratio as a whole while not increasing the size of the entire device. This transmission is composed of the continuously variable transmission, a planetary gear unit and an impeller unit. The planetary gear unit has a drive shaft, a carrier fixed to the drive shaft, a plurality of planetary gears supported on the carrier, and an internal gear meshing with the planetary gears. The continuously variable transmission unit has an input shaft to which is fixed a sun gear meshing with the planetary gear. With this arrangement, the impeller can be rotated at a high speed even if the speed ratio of the continuously variable transmission unit is low. The transmission unit also has a pressing mechanism at the input shaft end. Thus, it is possible to manufacture the three units separately and assemble them together.

Growing community of inventors

Iwata, Japan

Naoshi Hattori