Patent ID: 6182350
Filing Date: 2001-02-06
Classification: B60T,F04B,H02K,Y10T

Abstract:
A method for assembling an electric motor for driving a piston, wherein the electric motor for driving a piston includes:a yoke including a yoke bearing located at one end of the yoke;a pump housing connected to other end of the yoke and including a first pump housing bearing located in the pump housing;an armature shaft extending between the yoke bearing and the first pump housing bearing and including an eccentric shaft tip portion protruding from the first pump housing bearing and receiving a load for driving the piston in a radial direction; anda second pump housing bearing, smaller in diameter than the first pump housing bearing, located on the eccentric shaft tip portion of the armature shaft, the method comprising:press fitting an outer ring of the first pump housing bearing to the pump housing;assembling an outer ring of the yoke bearing to the yoke;press fitting one end of the armature shaft to an inner ring of the yoke bearing;press fitting the other end of the armature shaft to an inner ring of the first pump housing bearing; therebybearing the one end of the armature shaft of the electric motor by a yoke with a yoke bearing; andbearing the other end of the armature shaft by a pump housing with a first pump housing bearing.