TOOTH PROFILE STRUCTURE FOR SPIRAL BEVEL GEAR

摘要

PURPOSE: To avoid interfering in meshing without degrading a contact ratio even if a tooth width is increased by chamfering a corner section formed by an addendum surface and a tooth side surface at the small end with a radius determined by a specified formula. ;CONSTITUTION: In the spiral bevel type gear, for example, a hypoid gear, composed of a combination of a ring gear 1 (large gear) with a pinion gear 2 small in diameter, it is effective that the width of each tooth 1a of a ring gear 1 is increased for increasing the strength of a gear. In order to avoid interfering in meshing without degrading an effective contact ratio as the width of each tooth is increased, chamfering Q with the radius R of curvature determined by a formula R=[t+c+(2c_t)^1/2].cosθ (where (c) represents a interference in the tooth width direction at the small end section of the tooth surface, (t) represents a height from an addendum surface of a part not related to meshing at the small end section of the tooth surface, and θ represents a twist angle at the small end section), is applied to a corner section formed by the addendum surface C₁ and the tooth side surface J at the small end side of each tooth 1a.;COPYRIGHT: (C)1994,JPO