| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic molded gear for accurate power transmission by setting the thickness of a web or the width of a hub part or a rim in the radial direction at 2 mm or more so as to prevent the deformation when driving. SOLUTION: A plastic molding gear 1 is formed out of a hub part 3 having a shaft hole 4 at the center of a disk-like web 2, and the peripheral part of the web 2 is formed with a rim 5 formed with a gear part 6 at the peripheral surface thereof. Thickness t1 of the web 2 is set at 2 mm or more, and the web 2 having the web thickness t1 more than 2 mm can sufficiently show the drag to the thrust load, and deformation of the plastic molding gear 1 when driving for rotation can be restricted as small as possible. As a result, the accurate drive for rotation can be performed without providing a conventional rib.
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