Limiting structure for micro excavator chassis

A mounting hole is formed in a middle support, the mounting hole is a square hole, a rectangular sleeve is arranged on the end face where the mounting hole is located, a square channel is formed in the rectangular sleeve, the rectangular sleeve is fixedly connected with a center frame through a fixing bolt, and a motor is arranged at the upper end of the rectangular sleeve. The motor is fixedly connected with the rectangular sleeve through a bolt, the output end of the motor is connected with a lead screw, a limiting sliding block is arranged on the outer side of the lead screw and arranged on the inner side of the rectangular sleeve, a track frame is arranged on the inner side of the middle support, a limiting groove is formed in the track frame, and the motor is electrically connected with a control button through a wire. According to the utility model, the functions of remote control, electric control lifting, automatic switching of the limiting state and the separation state, improvement of the working ef