Three-station mechanism

The utility model discloses a three-station mechanism which comprises a rack, a switching-on and switching-off device, a grounding device and a main shaft device are installed on the rack, an energy storage device is arranged between the switching-on and switching-off device and the grounding device, and the switching-on and switching-off device and the grounding device are linked with the energy storage device and control the energy storage device to store and release energy. The opening and closing device and the grounding device are linked with the main shaft device, opening and closing torque and grounding torque are output to the load switch through the main shaft device, the opening and closing device comprises a motor driving module, the motor driving module is of a modular structure, and the motor driving module is installed on the machine frame in a replaceable mode. Parts of the mechanism are redesigned and remanufactured, related mechanisms are improved, the modular design of the parts of the mecha