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US 6,473,958 B2Granted
Motor shaft for rotational-to-direct motion converting motor and method of manufacturing the motor shaft
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsSotsuo Miyoshi, Hisashi Yokoyama
Life of this patent
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Abstract
A motor shaft for a rotational-to-direct motion converting motor has a rotation stopping portion formed in a plate shape, and a screw portion formed in a columnar shape. In addition, the motor shaft has a hole, arranged in an end portion of the motor shaft in a longitudinal direction of the motor shaft, for positioning the motor shaft in a form rolling. Therefore, a position shift or a phase shift of thread ridges formed on the screw portion can be prevented.
Claims2
A method of manufacturing a motor shaft for a rotational-to-direct converting motor comprising:
- removing a prescribed-shaped second plate material including a rotation stopping portion from a first plate material;
- forming the prescribed second plate material, other than the rotation stopping portion, into a columnar portion, wherein said forming comprises pressing the prescribed second plate material;
- and
- forming thread ridges on the columnar portion.
1 more element
Dependencies are inferred from the claim text.