Driving motor equipped with BLDC motor, and actuator using same

An actuator comprising:

• a housing having first and second accommodation spaces;
• a driving motor having a BLDC type motor installed in the first accommodation space of the housing and generating a rotational output from a rotor;
• a printed circuit board (PCB) mounted on an upper side of the driving motor and having a motor driving circuit mounted for generating a motor driving signal according to reception of an external control signal;
• a gear train installed on an upper portion of the PCB in a longitudinal direction to reduce the rotational output of the driving motor to increase a torque;
• and
• an output shaft installed in the second accommodating space of the housing and outputting the torque increased by the rotational output transmitted through the gear train to the outside of the housing,
• wherein the output shaft comprises:
• a first shaft having a second worm wheel installed at an upper portion thereof to be gear-coupled to a first worm gear of a power transmission shaft and an upper slip gear installed at a lower end thereof;
• and a second shaft in which a lower slip gear engaged with the upper slip gear is installed at an upper end thereof and the lower end portion is extended to the outside of the housing, and
• wherein the upper slip gear and the lower slip gear have an upper portion and a lower portion engaged with each other in a triangular saw tooth shape, to thus cause a slip when an external pressure is applied in a single direction.