Patent ID: 6380648
Filing Date: 2002-04-30
Classification: H02K

Abstract:
A wheel drum structure of an inner stator with inbuilt switches, comprising:an inner stator portion, an inner ring portion end thereof forming a hollow space, said inner stator portion also having wire grooves to receive a plurality of stator coils; a stator coil circuit board providing a plurality of solder holes so that wire heads/tails of said plurality of stator coils can pass through to be soldered and fixed; two cover plates covering over upper and lower end faces of said inner ring portion end, a central end of said two end cover plates corresponding to a common center of an outer rotor portion and said inner stator portion of a motor to form a concentric positioning hole; a plurality of switches soldered and fixed on a switch circuit board, said switch circuit board being locked at one side of said end cover plates, said plurality of switches being disposed in said hollow space of said inner ring portion end of said inner stator portion; a wheel drum supporting shaft pressed and joined in said central positioning hole at the central end of said end cover plates, said supporting shaft protruding out of a housing cover plate of the wheel drum, said supporting shaft having more than one through holes and providing said switches circuit outputs of windings of said stator coils, said switch control system being connected to said switches via said through holes; and an outer rotor portion comprising a bearing whose inner bore is sleeved on said wheel drum supporting shaft and whose outer bore is sleeved in a housing cover plate thereof, said housing cover plate gripping and locking an outer magnet and a magnet iron yoke ring to operate an armature with said inner stator portion.