Ntn Corporation

Mitsuo Kawamura

Tomomi Ishikawa

Makoto Muramatsu

Takayuki Kawamura

Kentaro Nishikawa

Masato Yoshino

Tomoya Sakaguchi

Yuuji Yada

Yasuyuki Fujita

Hiroki Yabuta

Hiroki Fujiwara

Takushi Matsuto

Taisuke Igi

Eiichiro Shimazu

Takahiro Okuno

Yasutake Hayakawa

Ryuichi Sakamoto

Junichi Ooshimo

Tomohiko Obata

Provided is a motor which includes a stator that can be received in a limited housing space and is capable of providing an increased output without increasing an axial length of the stator; a vehicle power unit including the motor; a generator; as well as a vehicle wheel bearing assembly with the generator. The motor generator includes: a stator including a stator core having an annular shape and stator coils wound around the stator core; and a rotor located opposite to the stator in a radial direction. Each of the stator coils includes coil ends that protrude with respect to an axial width of the stator core in an axial direction. A bus bar is connected to a wiring connection part at the coil ends, and the bus bar is disposed within an axial width of the stator core.

Motor, vehicle power unit with motor, generator, vehicle wheel bearing with generator

Provided is a wheel bearing apparatus with a generator that can have a simplified structure to reduce costs and is capable of preventing electrolytic corrosion. The wheel bearing apparatus with a generator includes a wheel bearing and a generator. The generator includes a stator attached to a fixed wheel and a motor rotor attached to a rotating wheel and is of an outer-rotor type in which the stator is located on an outer periphery of the wheel bearing, and the motor rotor is located radially outside of the stator. The wheel bearing apparatus with the generator further includes at least one conducting unit that conducts a current between the fixed wheel and the rotating wheel.

Wheel bearing system with generator

The power device for a vehicle includes: a wheel bearing including a stationary ring and a rotary ring having a hub flange, the rotary ring being rotatably supported by the stationary ring via rolling element, the hub flange being configured to be attached with a wheel of a vehicle and a brake rotor; and a generator including a stator attached to the stationary ring of the wheel bearing and a rotor attached to the rotary ring of the wheel bearing, wherein the rotor includes a soft magnetic material part, magnets, and a resin material part that is integrally molded with the soft magnetic material part and the magnets.

Power device for vehicles

A wheel support bearing assembly includes a wheel support bearing and a power unit. The power unit is that of an outer rotor design in which a stator is located at an outer periphery of the wheel support bearing and a rotor is located radially outward of the stator. A radial extension of the entire power unit is sized to be radially inward of a peripheral section of a brake rotor. An entirety of the power unit, excluding a mount part thereof to a hub flange, is sized to be situated in an axial range between the hub flange and a mount surface, on an inboard side of the wheel support bearing. The rotor includes an outer shell magnetic body, which is made from soft magnetic material and forms an outer shell of the power unit, and permanent magnets that are provided to the outer shell magnetic body.

Bearing device for vehicle wheel, and vehicle provided with bearing device for vehicle wheel

The vehicle power device includes: a wheel bearing including a stationary ring and a rotary ring; and a motor including a stator and a rotor. The stator and the rotor of the motor generator have a smaller diameter than that of an outer peripheral part of the brake rotor, and an entirety of the motor, excluding a mounting part to the hub flange, is located within an axial range between the hub flange and an outboard-side surface of a chassis frame component. An insulating layer is interposed between the stationary ring and the stator.

Vehicle power device and wheel bearing device with generator

A vehicle power assist system can be applied to a vehicle with a driven wheel () that is mechanically unconnected to a main drive source () such as an internal combustion engine. The driven wheel () is supported by a wheel support bearing assembly () to which a drive assist, motor generator () is mounted. A rotor of the motor generator () is directly fixed to a rotational ring of the wheel support bearing assembly () without interposition of a speed reducing mechanism or a speed increasing mechanism. The vehicle power assist system includes a power storage unit () configured to store a regenerative power generated by the motor generator () and to supply the stored power to the motor generator ().

Vehicle power assist system

An auxiliary power unit equipped wheel support bearing assembly is provided which includes a wheel support bearing assembly and an auxiliary power unit. The auxiliary power unit is of a direct drive design that includes a stator mounted to a stationary ring of the wheel support bearing assembly and a motor rotor mounted to a rotational ring of the wheel support bearing assembly. An entirety of the auxiliary power unit is sized to extend less than an outer peripheral segment of a brake rotor, with the outer peripheral segment defining an area against which a brake caliper is intended to be pushed. The auxiliary power unit is, with respect to an axial direction, sized to be situated between a hub flange of the wheel support bearing assembly and a mounting face of the wheel support bearing assembly for mounting to a vehicle body of a vehicle.

Bearing device for wheels with auxiliary power device

The present invention provides a foil bearing (), including: a top foil portion (Tf); and a back foil portion (Bf), which is arranged on a back of the top foil portion (Tf), and is configured to elastically support the top foil portion (Tf), wherein the back foil portion (Bf) includes: an intermediate portion () being flat; first projecting portions () projecting on a front side of the intermediate portion (); and second projecting portions () projecting on a back side of the intermediate portion ().

Foil bearing

A rolling bearing that can easily achieve the higher lubricating characteristic including the smaller rotational torque while employing the existing bearing shape and lubricant is provided. A rolling bearingincludes: an inner ringand an outer ringas a race ring; a plurality of rolling elementsheld between the inner and outer rings; a retainerthat retains the rolling elements; a sealing memberprovided at openings on opposite ends in an axial direction of the inner ringand the outer ring; and greaseto be enclosed in an in-bearing space. At least one member selected from the inner ring, the outer ring, the retainer, and the sealing memberis provided with a flocking partformed by flocking fiber on a surface of the member which is in contact with the grease

Rolling bearing

A foil bearing unit includes: a first foil holder formed of a single component; a radial bearing foil mounted to an inner peripheral surface of the first foil holder; a thrust bearing foil mounted to an end surface of the first foil holder; and an inner member including: a shaft portion; and a flange portion projecting radially outward from the shaft portion. The inner member is supported in a radial direction by a fluid pressure that is generated in a radial bearing gap between a bearing surface of the radial bearing foil and an outer peripheral surface of the shaft portion, and the inner member is further supported in a thrust direction by a fluid pressure that is generated in a thrust bearing gap between a bearing surface of the thrust bearing foil and one end surface of the flange portion.

Foil bearing unit

A cage is made of a magnesium alloy such as AZ91D, and is molded by means of injection molding. In this cage, a confluence region is brought away to outside the cage during the injection molding. The confluence region is a region including a void formed by merging of flows of the magnesium alloy. When observing a cross sectional surface of the cage, a ratio of an &#x3b1; phase having a grain size of 20 &#x3bc;m or greater is less than 15% in the magnesium alloy constituting the cage.

Cage and rolling bearing

A rolling bearing assembly and a crown shaped retainer, in which the rotating torque of the bearing assembly can be reduced with no limitation in use of the bearing assembly and with no need to modify the grease and the sealing member are provided. The rolling bearing assembly includes a plurality of balls interposed between inner and outer rings, and a retainer for retaining the balls. The retainer is of a crown shaped configuration including a retainer ring body having one side face formed with pockets, each having a portion with an opening, defined at respective locations in a circumferential direction for accommodating therein the balls; a grease reservoir depressed portion provided between the neighboring pockets in the circumferential direction of the retainer ring body for reserving a grease; and a communicating port for communicating the grease reservoir depressed portion and the pocket.

Growing community of inventors

Iwata, Japan

Mitsuo Kawamura