| 摘要 |
<p>The present invention is a gear provided with a plurality of teeth (3), the gear transmitting rotational motion by meshing with teeth of a mating gear, wherein the shape (b) toward the root of each of the teeth (3) includes: a first curved surface (c) that is smoothly connected to a tooth surface (a) on an involute curve, the first curved surface (c) being represented by a curve that is inversely convex with respect to the tooth surface (a) on the involute curve; and a second curved surface (d) that is smoothly connected to the first curved surface (c) and is defined by a hyperbolic function that is convex in the same direction with respect to the first curved surface (c). It is thereby possible to reduce the tooth-root-side stress generated during meshing with the teeth of the mating gear, and to increase the strength of the teeth.</p> |
