Motor isolating switch

The utility model which relates to a motor drive disconnector comprises a switch body, an operation mechanism which is connected with a movable contact of the switch body through a disconnecting axis connecting bar and a switch pull rod. The operation mechanism comprises a main axis, an energy storage device, a control device and a motor, wherein, the energy storage device comprises a crank-rocker mechanism, an external torsion spring and an internal torsion spring which are handed oppositely and sleeved coaxially on the main axis, a spring positive stop plate which is fixedly arranged on the main axis and a spring fixation plate which is emptily sleeved on the main axis. The spring positive stop plate which is a round plate with notches on the circumference is provided with two concentric arc holes which are staggeredly distributed along the peripheral and the radial direction. One end of the spring is fixed on the spring fixation plate while the other end is hanged and connected with the arc holes of the spring positive stop plate, and the control device comprises two sets of double rocker mechanisms and an electromagnet, and the dynamic is transmitted to the spring fixation plate through the crank-rocker mechanism after the motor is decelerated, and the disconnecting axis connecting bar is fixedly connected with the disconnecting axis which is fixed at the main axis.