GEAR AND METHOD FOR PRODUCING SAME

摘要

A gear including plural teeth 3 to mesh with teeth of a corresponding gear to thereby transmit a rotational motion is provided. A form (b) of a tooth root side of each tooth 3 includes: a first curved surface c that is smoothly connected to a tooth surface a having an involute curve and has a profile expressed by a curve that is convex in an inverse direction of the involute curve of the tooth surface a; and a second curved surface d that is smoothly connected to the first curved surface c and has a profile defined by a hyperbolic function having a curve being convex in the same direction as the first curved surface c. It is possible to reduce a stress generated on the tooth root side at the time of meshing with teeth of the corresponding gear and thus to increase the strength of the teeth.

主权项

1. A gear comprising a plurality of teeth to mesh with teeth of a corresponding gear to thereby transmit a rotational motion,
wherein a form of a tooth root side of each tooth comprises: a first curved surface that is smoothly connected to a tooth surface having an involute curve and has a profile expressed by a curve that is convex in an inverse direction of the involute curve of the tooth surface; and a second curved surface that is smoothly connected to the first curved surface and has a profile defined by a hyperbolic function having a curve being convex in the same direction as the first curved surface.