Mechanical interlocking device for three-position disconnecting switch and circuit breaker

The utility model relates to a mechanical interlocking device for a three-position disconnecting switch and a circuit breaker. The mechanical interlocking device consists of a telescopic sleeve mechanism, a cam mechanism and a steel rope, wherein the telescopic sleeve mechanism is positioned in a circuit breaker operating mechanism; the cam mechanism is positioned in a three-position disconnecting switch operating mechanism; the steel rope is positioned between the telescopic sleeve mechanism and the cam mechanism; and one end of the steel rope is fastened on the telescopic sleeve mechanism through a first steel rope screw and the other end of the steel rope is fastened on the cam mechanism through a second steel rope screw. By the device, a swinging connecting rod is pressed through three protruding positions on a cam indicating dial on the disconnecting switch, the swinging connecting rod pulls the telescopic sleeve mechanism arranged on the circuit breaker to move through the steel rope, and rotation of a