Toothing system of a gearwheel having involute roller toothing

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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Details

IPC codes

F16H 55/08 (2006.01)

Type

Patent

Patent number

CA 2643836

Description

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.

L'invention concerne la denture (1) d'une roue dentée comprenant une pluralité de dents (2, 3 ; 19) dont les flancs (4, 5, 6 ; 22) de dent sont configurés à développante au-dessus d'une zone (7, 8, 9 ; 23) de pied de dent des flancs (4, 5, 6 ; 22) de dent, la zone (7, 8, 9 ; 23) de pied de dent des flancs (4, 5, 6 ; 22) de dent observés dans une coupe normale, zone qui s'étend entre un point (15, 16, 17 ; 23) utile de pied et un point (F) de pied, étant de forme elliptique, venant se connecter de manière tangentielle dans le point (15, 16, 17 ; 24) utile de pied à la zone à développante du flanc (4, 5, 6 ; 22) de dent et étant tangentielle au cercle (FKS) du pied de dent dans le point (F) de pied. Le flanc (4, 5, 6 ; 22) de dent observé dans une coupe normale suit dans sa zone (7, 8, 9 ; 23) de pied de dent sensiblement une section (B) partielle d'une ellipse (10, 11, 12 ; E) ayant des demi-axes (a, b) de longueur différentes, un demi-axe (a, b) étant incliné sur l'ellipse (10, 11, 12 ; E) selon un angle de basculement d'ellipse alpha supérieur à 0° et inférieur 90° par rapport à une radiale (R) à travers le point (F) de pied. De plus, les flancs (4, 5, 6 ; 22) de dent des dents (2, 3 ; 19) de la denture sont réalisés symétriques les uns aux autres par rapport à un plan (A) de symétrie divisant la dent (2, 3 ; 19) correspondante dans le sens axial.

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