MULTI-STAGE PLANETARY UNIT HAVING A ONE-PIECE PLASTIC CIRCULAR GEAR AND A ONE-PIECE TRANSMISSION HOUSING

摘要

PURPOSE: A multi-stage planetary unit is provided to reduce the noise by using a plastic circular gear.;CONSTITUTION: A cylindrical transmission housing (10) is formed in one piece and prepares a first internal gear (11) to form a gear speed with more than one circular gear. A plastic circular gear (20) prepares a second internal gear (21) to form more than one additional gear speed and is accommodated by a transmission housing. Torque prevention units (22,26a,26b) are torque-preventive connect the plastic circular gear to the transmission housing. More than two sun gears combs a planetary gear and a circular gear arranged in a pinion cage.;COPYRIGHT KIPO 2013