Jeco Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Yoshiyuki Ariki

Hikoshi Izumi

Taiki Miyokawa

Yuta Muneyoshi

Tomoki Mabuchi

Akio Ito

Toru Iwasa

An actuatorincludes a housing, an output shaftprotruding from the inside of the housingto the outside, a motorprovided in the housing, and a reduction mechanismthat connects the motorwith the output shaft. The reduction mechanismincludes a worm gear, in which a wormprovided at a front end of a drive shaftprotruding from a main bodyof the motorand a worm wheelrotating integrally with the output shaftare engaged. A spindlefor increasing an inertia is provided between the wormof the drive shaftand the motor body

Actuator and exhaust valve driving device

An actuatorincludes a housing, an output shaftprojecting from the inside of the housingto the outside, a motorprovided in the housing, a reduction mechanismwhich connects the motorto the output shaft, a magnetprovided for rotation integrally with the output shaftinside the housing, a Hall effect ICdisposed to face the magnetoutside the rotation locus of the magnet, and a circumferential walldisposed to stand from the inner wall of the housingand interposed between the magnetand the Hall effect IC

In an Oldham coupling, a first protruding part, protruding in a coaxial direction parallel to and extending in a first direction, is provided in one of first and second members, and the other of the first and second members includes a first notch part fitted to the first protruding part and slidable in the first direction along the first protruding part. A second notch part, extending in a second direction perpendicular to the first direction, is formed in one of second and third members, and the other of the second and third members includes a second protruding part fitted to the second notch part and slidable in the second direction along the second notch part. At least one of the first, second, and the third members has a heat dissipating structure including mutually separated concentric hollow cylinders of different diameters, connected by a bridge part.

Oldham coupling

In a stepping motor, each of four integrally molded annular stators constituting two pairs has an annular plate having a central hole in which a magnet rotor is to be inserted, and pole teeth that form magnetic pole portions separated from the magnet rotor at a predetermined gap. The pole teeth of one annular stator of a given pair extend from the annular plate to be perpendicular to the other of the given pair, and are equidistantly arranged around the central hole to be shifted from the pole teeth of the other annular stator by a half pitch. Mounting holes are formed in each annular plate at predetermined spaces in the circumferential direction, and the mounting holes formed in the annular plates of given annular stators of different pairs that are arranged back to back are located at the same positions. Molded insulating films are formed on surfaces, which do not oppose the magnet rotor, of all the annular stators. The insulating films are coupled to each other through the mounting holes formed in the annular plates of the given annular stators. Excitation coils are wound on all the annular stators through the insulating films. A plate-like yoke has a major portion inserted between opposing surfaces of the annular plates adjacent to the outer circumferential surfaces of all the annular stators.

Stepping motor having improved construction to reduce parts and

An odometer apparatus having an error elimination mechanism for eliminating an error in an indication figure. The odometer apparatus includes a set of gears rotatably supported on a first shaft for indicating each digit of a set of digits in the indication figure, a set of pinions coupled with the gears and rotatably supported on a second shaft for transmitting a rotation force to the gears, a set of bosses each arranged between two adjacent pinions and formed integrally with the pinions, each of the bosses having a substantially square section taken in a plane perpendicular to the second shaft, and a pressure member for eliminating an error in the indication figure due to a backlash between the gears and the pinions. The pressure member is engaged in a unique manner with a side surface of one of the bosses such that the side surface of the boss is pressed by the pressure member at a predetermined angle to the side surface so as to apply appropriate pressure to the boss on the second shaft to eliminate an indication figure error. Also, the odometer has a reverse rotation prevention mechanism which is formed with a spring member for preventing the gears from being rotated reversely around the first shaft.

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Saitama, Japan

Yoshiyuki Ariki