Jtekt Corporation

Toshiki Kumeno

Takashi Matsumoto

Hiroshi Kitamoto

Akihiro Takeuchi

Riku Nagayama

Nobuaki Ikehara

Nobuyuki Togashi

Goro Tsuji

Chishin Yohena

Hiromichi Ohta

Kazuyoshi Ohtsubo

Masashi Yoritsune

Yoshitaka Yoshimi

Toshihiro Ishikawa

Kouji Kitahata

Tomoyuki Takei

An assist device includes a first body-worn unit, second body-worn units, an actuator, a detection part, a controller configured to obtain an assist parameter for causing the actuator to generate a desired assist force, and perform control for causing the actuator to operate at an output corresponding to the assist parameter. When the user performs a forward leaning action, the controller obtains the assist parameter for providing the user with the assist force in a direction of bringing the user to an upright standing posture based on the tilt angle and a time-based change in the tilt angle. The controller is configured to further perform an assistance moderation process to reduce the assist force when the time-based change in the tilt angle increases.

Assist device

Wheelchair

An assist device includes a body wearing unit and an actuator unit. The actuator unit includes an output link configured to pivot about a joint of an assist target body part and to be attached to the assist target body part; an actuator including an output shaft configured to generate an assist torque via the output link; a torque determination unit configured to determine a combined torque obtained by combining a user torque and the assist torque from the output shaft, the user torque being input from the output link when the user causes the assist target body part to pivot; a correction unit configured to calculate a correction amount for the determined combined torque; and a pivot angle control unit configured to control a pivot angle of the output shaft based on the determined combined torque and the calculated correction amount.

An assistance apparatus includes: a body brace; an output link to be put on an assistance subject body part, the output link pivoting about a joint in the assistance subject body part; an actuator including an output shaft that generates an assistance torque; a torque detection section provided at any position on the way from the output link to the output shaft (of the actuator); torque determination section for determining a combined torque that is a combination of a subject person torque input from the output link as a result of a subject person making the assistance subject body part pivot with the subject person's own strength and the assistance torque from the output shaft; and a controller that controls a rotational angle of the output shaft based on the combined torque.

Assistance apparatus

A control unit that relatively moves a headstock and tailstock and a tool to thereby machine a peripheral surface of a workpiece in a radial direction executes control such that a relative feed speed of the tool in the radial direction in a transitional state where an amount of warpage of the workpiece in the radial direction at a machining position increases is faster than a relative feed speed of the tool in the radial direction in a steady state where an amount of warpage of the workpiece in the radial direction at the machining position is constant. By so doing, it is possible to reduce a machining time at the time of the start of machining.

Machine tool and machining method

A resolver includes: a resolver rotor attached to a rotational shaft; an annular resolver stator that is provided on a radially outer side of the resolver rotor and that has a plurality of teeth each opposed, across a clearance, to an outer peripheral face of the resolver rotor and circumferentially arranged at given intervals; and a case member having a cylindrical fit portion to which an outer peripheral face of the resolver stator is fitted. At least three protrusions, each protruding radially outward, are formed at given circumferential intervals on the outer peripheral face of the resolver stator, so that the outer peripheral face of the resolver stator is press-fitted to an inner peripheral face of the fit portion at positions at which the protrusions are formed.

Resolver and resolver-rolling bearing unit

In a grinding machine, a retraction grinding is performed after a first advance grinding. Within a rotational range for a cylindrical workpiece to rotate from a present rotational phase to a target rotational phase in the retraction grinding, target grinding resistances in respective rotational phases are generated based on residual grinding amounts in the respective rotational phases of the cylindrical workpiece. Then, the retraction grinding is performed and controlled to make a grinding resistance detected by a force sensor agree with the target grinding resistances in respective rotational phases.

Growing community of inventors

Kyoto, Japan

Toshiki Kumeno