Ntn Corporation

Atsushi Ikeda

Tomomi Ishikawa

Takushi Matsuto

Shinsuke Hirano

Yoshinori Ikeda

Koji Sato

Takahide Saito

Masahiro Kawai

Akio Kato

Takushi Matsutou

Tatsuji Inoue

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.

Electric actuator

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 ().

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 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 (); 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 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 ().

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 ().

Sensor target, movable-part unit comprising the target, and electric actuator

An automatic clutch device includes an axial force generating mechanism including an electric motor arranged adjacent to the outer periphery of an end of an input shaft of a transmission, and a rotation-linear motion conversion mechanism for converting the rotation of the rotor of the electric motor to a linear motion of a release bearing. The rotation-linear motion conversion mechanism includes plural annular cam plates arranged in tandem on the input shaft, and torque cam mechanisms each disposed between each opposed pair of cam plates, for reduced size and improved responsiveness of the automatic clutch device.

Growing community of inventors

Shizuoka, Japan

Atsushi Ikeda