Micro step motor with double driving shafts
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The present invention discloses a micro step motor with double driving shafts. The step motor comprises two concentric inner and outer rotary driving shafts which can independently drive two pointers to point two paths of information. The motor comprises a plurality of parts such as shells (1) and (2), an inner rotating shaft (3), an outer rotating shaft (17), stator core bodies (16) and (30) of the inner and outer shafts, a two-stage deceleration transmission gear system corresponding to the inner and outer rotating shafts, a motor driving PCB (31), a driving chip (32) for six-fold subdivision for an intrinsic step angle of the motor and the like. The deceleration ratio of deceleration gear trains of the inner driving shaft is 60 to 1, and the deceleration ratio of deceleration gear trains of the outer driving shaft is 80 to 1. Through the subdivision of the motor driving IC chip (32), each path can realize six-fold subdivision fine control based on the intrinsic step angle, and the motor is mainly used for double-pointer drive of automobile instruments and other pointer type instruments.