Spur gear differential for use as e.g. distribution, branching, and axle differential gear box in motor car, has coupling and circulation planetary parts formed such that cladding circle is smaller than addendum circle of teeth

摘要

The differential has two sets of circulation planetary parts (P1, P2) engaging with two ring gear internal teeth (1a, 2a) of two sets of ring gears (1, 2), respectively. One of the sets of the circulation planetary parts and a coupling planetary part (PK2) exhibit same number of teeth. Axles (XP1, XP2) of the circulation planetary parts are arranged on a common axle circle. The coupling- and circulation planetary parts are formed by a profile connection such that a cladding circle coaxial to a circulation axis (X) is smaller than an addendum circle (K1) of one of the internal teeth.