Collision damage prevention limit device

The utility model relates to a collision damage prevention limit device, which is suitable to be used in a limit control system capable of taking limited travel reciprocating motion. The collision damage prevention limit device comprises a frame, a limit switch and an elastic shifting rod, wherein the limit switch is fixed on the frame and is used for controlling an electromechanical system to operate; the elastic shifting rod is used for turning on and turning off the limit switch; one end of the elastic shifting rod is provided with a front shifting rod for directly shifting the limit switch; the other end of the elastic shifting rod is provided with a rear shifting rod which is fixedly connected with a reciprocating part; and a stop pin for limiting the front shifting rod and an elastic stop block for limiting the rear shifting rod are also fixed on the frame. The collision damage prevention limit device has the advantages that the requirement on accurate limiting in the control system can be met and a mec