The motor of the returnable electric cylinderis installed in par-  allel to the electric cylinder body, and the motor drives the  screw through the high-strength synchronous belt. Due to the  shortintegral length, the reciprocating electric cylinder is suit-  able for the occasions where the installation position is rela-  tively small. Servo motor and electric cylinder with a flexible,  easy to install, easy to set, easy to use.