Morihisa Yoshioka is a prominent inventor based in Iwata, Japan. He has made significant contributions to the field of engineering, particularly in the development of electrically driven linear actuators. With a total of 8 patents to his name, Yoshioka's work has had a substantial impact on the industry.

Latest Patents

One of Yoshioka's latest patents is an electrically driven linear actuator. This innovative actuator features a smooth motion of a ball screw, which provides an even load distribution and stable motion of the balls. The design includes an electric motor mounted on a housing, and a nut adapted to mate with the screw shaft. The nut is equipped with supporting portions at an axially central position on its outer circumferential surface to engage one end of a link. Additionally, the nut is formed with a screw groove, and oval bridge windows are created in the nut through a wall, with a portion of the screw groove cut out over a distance of at least two pitches of the screw grooves. A bridge member, which forms the circulating member, is fitted in each of the bridge windows.

Another notable patent involves a supporting structure for a ball screw shaft. This structure supports a ball screw that is rotationally supported by a housing via supporting bearings. The screw shaft is formed with a fitting portion and a positioning shoulder on its outer circumference. The inner ring of the supporting bearing is press fit onto the fitting portion via a predetermined interference. A steel spacer ring is fitted onto the fitting portion from the outer side of the supporting bearing, with the inner side of the inner ring abutted against the shoulder. A caulking portion is formed on the end of the fitting portion by plastically deforming it radially outward, ensuring that the inner ring is axially immovably secured on the screw shaft.

Career Highlights

Yoshioka has dedicated his career to advancing technology in the field of linear actuators. His innovative designs have not only improved the efficiency of existing systems but have also paved the way for new applications in various industries. His work at Ntn Corporation has been instrumental in driving forward the company's technological capabilities.

Collaborations

Throughout his career, Yoshioka has collaborated with talented individuals such as Isamu Yoshida and Ko

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