The embodiment of the utility model discloses propelling device. The embodiment of the utility model provides an include: lead screw propulsion structural and claw cover, claw cover one end with lead screw propulsion structural's lead screw fixed connection, the claw cover other end is equipped with a plurality of lock joint claw, propelling device includes lead screw, transmission structure and power structure, the power structure with the lead screw rotates the installation, transmission structure with the power structural connection. The utility model discloses can be used for effectively solving that current secondary is pulled out and the difficult and big technical defect of danger coefficient of operation when impeing fixed -type switch cabinet on -off mechanism.