| 摘要 |
PURPOSE:To extend a motor service life by composing the contact of a movable unit with a vibrator of many rotatable spheres, and increasing a frictional force between the spheres and the unit body by the frictional force between the spheres and the vibrator, thereby reducing the wear. CONSTITUTION:Many electromechanical energy converter 1 is mounted on a vibrating plate 2. A movable unit 3 is composed of a ringlike movable structure 3a having U-shaped section of body, an elastic unit 3b of rubber sponge formed on the bottom of the U-shape, wear resistant sphere 3c made of resin or metal contained in the U-shape, and a retainer 3d for holding the positions of the spheres 3c. Only the spheres 3c contact the plate 2, and the frictional force between the plate 3b and the sphere 3c is selected to increase from the frictional force between the plate 2 and the sphere 3c. The contacting position of the sphere 3c with the vibrator 2 moves as the motor is driven, thereby reducing the wear of the sphere 3c. |
