Patent ID: 7682272

Claim:
A driving device of an armature balance machine in which a belt for transferring rotation power of the driving motor to the outer peripheral surface of an armature core and a plurality of rollers with the belt wound therearound are formed in a bracket, wherein a pair of guides with a pair of sliders coupled thereto is formed at one side of the bracket having an inserting hole formed therein; wherein a driving motor with a driving roller connected in series passing through the insertion hole is attached to the pair of sliders with a plate, and a pair of first upper and lower tension springs are connected to the plate and both sides of the bracket; wherein a pair of hinge blocks connected to each other by a second tension spring is rotatably mounted to an upper side of the bracket, and each hinge block is hinged with a hinge shaft and a hinge bolt in such a way that the hinge shaft is disposed on a same centerline as the driving roller, a variable roller is formed in the end thereof, and the hinge bolt is inserted to a guide groove formed in the upper portion of the bracket; wherein a pair of fingers each having a complementary roller respectively is installed in the pair of the hinge blocks in such a manner as to be symmetrical about a virtual centerline of the driving roller, and a pneumatic cylinder provided in the bracket is mounted to a mounting protrusion formed at one side of the hinge block; and wherein a belt is wound around the rollers.