Ntn Corporation

Takushi Matsuto

Yoshinori Ikeda

Tomomi Ishikawa

Atsushi Ikeda

Shinsuke Hirano

Yuuki Naitou

Takahide Saito

Akio Kato

Kentaro Nishikawa

Mitsuo Kawamura

Shintarou Ishikawa

Tatsuji Inoue

A differential includes a drive rotating body rotatable about a rotation axis, a planetary rotating body that is rotatable and is revolvable about the rotation axis, and a driven rotating body rotatable about the rotation axis. The planetary rotating body is made to mesh with each of the drive rotating body and the driven rotating body, so that a first speed reducer is constituted between the planetary rotating body and the drive rotating body and so that a second speed reducer is constituted between the planetary rotating body and the driven rotating body. The planetary rotating body is driven by an electric motor, and the drive rotating body is driven by a driving force from an engine. The intake camshaft is provided on the driven rotating body, and the exhaust camshaft is provided on the drive rotating body.

Electric actuator

An electric actuator includes: an electric motor, a relay circuitthat switches ON/OFF of power supply to the electric motor, a motion conversion mechanismthat converts a rotary motion of the electric motorinto a motion in a direction different therefrom and outputs the motion, and a housing. The housingis configured by joining two housing split bodiesandto each other, and in an internal space formed by joining the two housing split bodiesand, the electric motor, the relay circuit, and the motion conversion mechanismare housed.

An electric actuator includes: a drive part (); a motion conversion mechanism part () configured to convert a rotary motion from the drive part () to a linear motion in an axial direction parallel with an output shaft () of the drive part (); a driving force transmission part () including a transmission gear mechanism () configured to transmit a driving force from the drive part () to the motion conversion mechanism part (); and a motion-conversion-mechanism support part () including a double-row bearing () configured to support the motion conversion mechanism part (), wherein the double-row bearing () is arranged on one side in the axial direction with respect to the transmission gear mechanism ().

An electric actuator () includes: a motor part (A); a motion conversion mechanism part (B); and a housing () configured to house the motor part (A) and the motion conversion mechanism part (B). The motion conversion mechanism part (B) includes: a screw shaft (); and a nut member () rotatably fitted to an outer periphery of the screw shaft. The screw shaft () performs a linear motion in an axial direction along with a rotation of the nut member (). The housing () includes a plurality of members coupled to one another in the axial direction. A terminal part (D) (terminal main body ()) configured to hold a power supply circuit configured to supply drive power to the motor part (A) includes a tubular portion (A) sandwiched by the members forming the housing () from both sides in the axial direction.

Electric actuator with screw shaft

Provided is an electric actuator, including: a drive part (); a motion conversion mechanism part () configured to convert a rotary motion from the drive part () into a linear motion in an axial direction in parallel to an output shaft of the drive part (); and a lock mechanism part () configured to prevent drive by the motion conversion mechanism part (). The lock mechanism part () includes: a rotary motor (); and a lock member (), which is driven by the rotary motor () so as to be brought into at least any one of a locking state of preventing the drive by the motion conversion mechanism part () and an unlocking state of releasing the locking state.

Provided is an electric actuator (), including: a motor (); a motor case () configured to accommodates the motor (); and a motion conversion mechanism () configured to convert a rotary motion generated through drive by the motor () into a linear motion in a direction parallel to an output shaft () of the motor (). The motion conversion mechanism () includes a movable part (, which is arranged in parallel with the output shaft () and is configured to perform the linear motion. The movable part () and the motor () overlap one another in a radial direction of the motor (). A sensor target () is arranged in the moveable part, and a non-contact sensor () configured to detect a position of the sensor target () in a linear motion direction in a non-contact manner is arranged in the motor case ().

Provided is an electric actuator including: a drive part (); a motion conversion mechanism part () configured to convert a rotary motion from the drive part () into a linear motion a transmission gear mechanism () configured to transmit a driving force from the drive part () to the motion conversion mechanism part (); and a lock mechanism part () configured to prevent the drive by the motion conversion mechanism part (), wherein the transmission gear mechanism () includes a first gear () arranged on the drive part () side and a second gear () arranged on the motion conversion mechanism part () side, and wherein the lock mechanism part () is arranged on an opposite side of the drive part () with respect to the first gear (), and on the motion conversion mechanism part () side with respect to a rotation center line of the first gear ().

Provided is an electric actuator (), including: a motor part (A); and a motion conversion mechanism part (B). The motion conversion mechanism part (B) includes: a ball screw shaft (); and a ball screw nut (), which is rotatably fitted to an outer periphery of the ball screw shaft (), and is provided so as to be capable of transmitting torque with a rotor () of the motor part (A) rotatably supported through intermediation of a rolling bearing (). The ball screw shaft () advances toward one side in the axial direction or retreats toward another side in the axial direction in accordance with a rotation direction of the ball screw nut (). In the electric actuator (), a needle roller bearing () serving as a thrust bearing is arranged adjacent to the ball screw nut () on the another side in the axial direction.

Provided is an electric actuator, including: a drive part (); a motion conversion mechanism part () configured to convert a rotary motion from the drive part () into a linear motion in an axial direction parallel with an output shaft of the drive part (); a driving force transmission part () configured to transmit a driving force from the drive part () to the motion conversion mechanism part (); and a motion-conversion-mechanism support part () configured to support the motion conversion mechanism part (), and wherein the drive part () and the motion-conversion-mechanism support part () are capable of being coupled to and decoupled from the driving force transmission part ().

Provided is a ball screw device (), including: a ball screw shaft (); and a ball screw nut () which is rotatably fitted to an outer periphery of the ball screw shaft () through intermediation of a plurality of balls (), wherein the ball screw shaft () performs a linear motion in an axial direction along with rotation of the ball screw nut (), wherein the ball screw shaft () has a hollow shape having a hole portion () extending in the axial direction, and wherein a stroke detection sensor () configured to detect an amount of displacement of the ball screw shaft () in the axial direction is arranged in the hole portion ().

Provided is an electric actuator, including: a motor part; a motion conversion mechanism part; an operation part; and a terminal part, wherein a hollow rotary shaft configured to support a rotor core of the motor part is supported by a rolling bearing so as to be rotatable, wherein the motion conversion mechanism part is coupled to the hollow rotary shaft, and includes a ball screw, wherein a ball screw nut of the ball screw is arranged inside the hollow rotary shaft, wherein the operation part is coupled to the motion conversion mechanism part, and wherein an inner raceway surface of the rolling bearing is formed on the hollow rotary shaft.

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

Provided is an electric actuator (), including: a motor part (A); and a motion conversion mechanism part (B) configured to convert a rotary motion of the motor part (A) into a linear motion to output the linear motion. The motion conversion mechanism part (B) includes: a screw shaft () arranged coaxially with a rotation center of a rotor () of the motor part (A); and a nut member () rotatably fitted to an outer periphery of the screw shaft. The rotor () includes a rotor inner () serving as a hollow rotary shaft having the nut member () arranged on an inner periphery thereof. A rotary motion of the rotor () is transmitted to the nut member () through an intermediate member (Z) arranged between an inner peripheral surface of the rotor inner () and an outer peripheral surface () of the nut member ().

A sensor target of the present invention is mounted to a movable part (), which is arranged in parallel with an output shaft () of a motor (), and is configured to perform a linear motion in a direction parallel to the output shaft (). The sensor target includes a magnet () and a magnet holder () configured to hold the magnet (). One pair or a plurality of pairs of fitting claws () capable of being fitted to an outer peripheral surface of the movable part () are formed on the magnet holder ().

Growing community of inventors

Shizuoka, Japan

Takushi Matsuto