Differential bevel gear, bevel gear differential and method for producing a differential bevel gear using forming technology
AssigneeHirschvogel Holding GmbH
InventorsJacqueline Bergmann, Uwe Alexander Rütjes
Life of this patent
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Abstract
A first differential bevel gear or equalizing bevel gear, suitable for a bevel gear differential in a vehicle, having a cone-shaped toothed section with external toothing having a plurality of teeth having a head height coefficient of at least 1.1. The bevel gear differential may further include a second differential bevel gear mating with the equalizing bevel gear and molded as an axle shaft gear, wherein teeth of the axle shaft gear have a head height coefficient of at least 1.2, and wherein a total coverage of the equalizing bevel gear and axle shaft gear is in the range of 1.5 to 2.0. Furthermore, a manufacturing method for the differential bevel gear is disclosed.
Claims14
A vehicle differential bevel gear comprising:
- a cone-shaped toothed section including external toothing with a plurality of teeth having a head height coefficient defined as a ratio between a head height of the teeth and a pitch of the differential bevel gear of at least 1.1, wherein the differential bevel gear comprises a foot height coefficient in a range from 1.1 to 2.0 such that the foot height coefficient is greater than the head height coefficient.
A vehicle bevel gear differential comprising:
- a first differential bevel gear molded as an equalizing bevel gear comprising an external toothing including teeth having a head height coefficient of at least 1.1, and the differential bevel gear comprises a foot height coefficient in a range from 1.1 to 2.0 such that the foot height coefficient is greater than the head height coefficient;
- and
- a second differential bevel gear mating with the equalizing bevel gear, the second differential bevel gear being molded as an axle shaft gear comprising teeth having a head height coefficient of at least 1.2,
- a total coverage of the equalizing bevel gear and the axle shaft gear being in a range of 1.5 to 2.0.
A method of producing a vehicle differential bevel gear, the method comprising:
- providing a preform comprising a section of a round material;
- inductively heating the preform to a temperature between 650° C. and 1250° C.;
- bulk forming of the preform to form a differential bevel gear having a cone-shaped toothed section comprising external toothing with a plurality of teeth having a head height coefficient of at least 1.1, wherein the differential bevel gear comprises a foot height coefficient in a range from 1.1 to 2.0 such that the foot height coefficient is greater than the head height coefficient;
- and
- cooling of the differential bevel gear.
Dependencies are inferred from the claim text.