Toothing system of a gearwheel having involute roller toothing

Details Toothing system of a gearwheel having involute roller toothing Toothing system of a gearwheel having involute roller toothing

2011-05-31

2011-05-31

Krause, Justin (Department: 3656)

Machine element or mechanism

Gearing

Teeth

C074S434000

Reexamination Certificate

active

07950305

ABSTRACT:
In the toothing system (1) of a gearwheel having a plurality of teeth (2, 3; 19) whose tooth flanks (4, 5, 6; 22) have involute form above a tooth-root region (7, 8, 9; 23) of the tooth flanks (4, 5, 6; 22), the tooth-root region (7, 8, 9; 23) of the tooth flanks (4, 5, 6; 22) that, as viewed in normal section, extends between a root useful point (15, 16, 17; 23) and a root point (F) has elliptical shape, tangentially adjoins the involute region of the tooth flank (4, 5, 6; 22) at the root useful point (15, 16, 17; 24) and tangentially contacts the root circle (FKS) at the root point (F). In its tooth-root region (7, 8, 9; 23), the tooth flank (4, 5, 6; 22), as viewed in normal section, substantially follows a partial section (B) of an ellipse (10, 11, 12; E) whose semiaxes (a, b) have different lengths, one semiaxis (a, b) of the ellipse (10, 11, 12; E) being inclined at an ellipse tilting angle alpha larger than 0° and smaller than 90° relative to a radial (R) through the root point (F). Furthermore, the tooth flanks (4, 5, 6; 22) of the teeth (2, 3; 19) of the toothing are symmetric to one another across a symmetry plane (A) that divides the respective tooth (2, 3; 19) in axial direction.

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International Search Report and Written Opinion dated May 7, 2007from the corresponding PCT/EP07/000492.

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