Minebea Company, Limited

Ntn Corporation

Minebea Mitsumi Inc.

Yukihiro Terada

Shigeki Miyaji

Takeshi Matsuno

Jyunichi Okamoto

Kohei Kawamata

Yoshiya Yamamura

Shinji Yoshinaga

Hiroaki Itahashi

According to the present invention, a nut is in a state of being received by nut receiving means. In this state, a ball-embedding nozzle is fitted into the nut so that a gap between the inner circumference of the nut and the outer circumference of the ball-embedding nozzle is uniformly formed around the entire circumference thereof. Balls are supplied into a screw groove of the nut via a ball supply path in the ball-embedding nozzle.

Assembly device of ball screw and assembly method of ball screw

A multi-phase coil terminal structure for a motor, to which wire ends of at least two exciting coils are connected which include respective bifilar windings, is provided and includes: at least two first individual terminals each of which includes two segments; at least two second individual terminals each of which includes two segments; and an integrated common terminal which is formed in a single piece member and which includes two segments, wherein wire ends of the at least two exciting coils are connected to one segment of the two, while the other segment of the two serves as an external output, and wherein the first individual terminals, the second individual terminals, and the integrated common terminal are partly molded.

Multi-phase coil terminal structure and motor including same

A stepping motor includes a rotor assembly and a stator assembly including two stator units axially coupled to each other. The two stator units each include a pair of yokes which each include a base portion and a plurality of pole teeth extending from the base portion and which are disposed such that each of the pole teeth of one yoke and each of the pole teeth of the other yoke are arranged alternately in the circumferential direction. The pole teeth are shaped symmetric and each include a pair of slant sides inclined so as to become closer to each other with an increase of distance from the base portion, and the slant sides of adjacent pole teeth are located close to each other wherein a magnetic pole gap between the adjacent pole teeth pole teeth is about 0.2 times as large as the thickness of the pole teeth.

Stepping motor

Growing community of inventors

Shizuoka, Japan

Yukihiro Terada