Crown gear and differential assembly with a crown gear

A differential assembly in the form of a crown gear differential, used use in the driveline of a motor vehicle, comprising:

• a differential carrier which is rotatingly drivable around an axis of rotation (A);
• two sideshaft gears rotatably supported in said differential carrier around the axis of rotation (A);
• and
• a plurality of differential gears which rotate jointly with said differential carrier around said axis of rotation (A) and which engage said sideshaft gears;
• wherein said sideshaft gears are provided in the form of crown gears comprising:
• an annular toothing portion comprising crown toothing with addendum lines;
• and
• a hug which axially projects beyond said addendum lines of said crown toothing;
• wherein between said crown toothing and said hub there are formed transition portions which adjoin said addendum lines of said crown toothing and change into said hub;
• wherein said differential gears are provided in the form of spur gears.

A crown gear for use in a differential assembly comprising:

• an annular toothing portion comprising crown toothing with addendum lines, said crown toothing comprising a plurality of crown teeth;
• a hub axially projecting beyond said addendum lines;
• a plurality of transition portions formed between said crown toothing and said hub, said plurality of transition portions adjoining said addendum lines and transitioning into said hub;
• an annular region formed between an end contact face and dedendum lines of said annular toothing portion, said annular region comprising an axial thickness (L3) comprising one to two times the modulus (m) of said crown teeth (m≦L3≦2 m).