Modified elliptical gear and method for making the same

Details Modified elliptical gear and method for making the same Modified elliptical gear and method for making the same

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 35/02 (2006.01) F16H 55/08 (2006.01)

Patent

CA 2139695

A modified elliptical gear defined by a modified elliptical shape having perpendicularly disposed major and minor axes, and bulged portions projecting outwardly beyond the contour of a true ellipse in peripheral regions between the major and minor axes. A computer is preferably used to rotate a simulated hobbing rack having a row of hobbing teeth around the modified elliptical shape. The outline of the hobbing rack is traced at selected positions during the rack rotation to produce a profile of a modified elliptical gear with projecting gear teeth. A topping shape is superimposed upon the gear profile to selectively top the gear teeth. The modified elliptical gear profile is transmitted to a machining means operable to produce a modified elliptical gear.

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