INJECTION MOLDING RESIN GEAR AND METHOD OF MANUFACTURING THE SAME

摘要

An injection molding resin gear includes: a tooth portion having teeth formed on an outer peripheral portion thereof; a shaft supporting portion formed around a center of rotation; and a web that connects the tooth portion and the shaft supporting portion, wherein the web includes a concave and convex portion having a concave portion formed on a first surface and a convex portion formed on a second surface formed at a position corresponding to the concave portion, and one of the concave portion or the convex portion of the concave and convex portion includes a gate point, and the concave and convex portions include a thinned portion at radial end portion in a radial cross section passing through the center of rotation of the concave and convex portion.

主权项

1. An injection molding resin gear comprising:
a tooth portion having teeth formed on an outer peripheral portion thereof; a shaft supporting portion formed around a center of rotation; and a web that connects the tooth portion and the shaft supporting portion, wherein the web includes a plurality of concave portions and a plurality of convex portions having a concave portion formed on a first surface and a convex portion formed on a second surface formed at a position corresponding to the concave portion, and one of the concave portions and the convex portions of the concave and convex portion includes a gate point, and the concave and convex portions include a thinned portion in a radial cross section passing through a center of rotation of the concave and convex portion.