Stepless speed change electronic parking actuating mechanism

The invention discloses a stepless speed change electronic parking actuating mechanism which comprises a motor for providing torque power, an input stage planetary gear mechanism connected with the motor, an output stage planetary gear mechanism connected with the input stage planetary gear mechanism, and a gear rack mechanism connected with the output stage planetary gear mechanism, wherein the input stage planetary gear mechanism comprises an input stage planetary carrier, an input stage planetary gear, an input stage gear ring and an input stage sun gear; the output stage planetary gear mechanism comprises an output stage planetary carrier, an output stage planetary gear, an output stage gear ring and an output stage sun gear; the input stage sun gear is connected with the output stage gear ring through an oil pipe to form two symmetrical speed-increase torque-decrease loops; and the input stage gear ring is connected with the output stage sun gear through an oil pipe to form two symmetrical speed-decrease torque-increase loops. On the premise of implementing continuously variable transmission ratio, the invention ensures the power transfer stability and large transmission torque; and since the braking system is irrelevant to the vehicle model, the invention has favorable adaptability, and can be used for multiple vehicle models.