Movable positioning pin structure of excavator counterweight outer side plate

The utility model discloses a movable positioning pin structure of an excavator counterweight outer side plate. The movable positioning pin structure comprises a platform, a pin, a guide sleeve, a fixed sleeve and a spring, wherein the pin is arranged in the guide sleeve and is of a nonstandard part; a protrusion part, stretching out of the upper end surface of the platform, of the upper end of the pin, is a positioning part, and a stop groove is formed in the outer circular surface adjacent to the middle lower part of the pin; the guide sleeve is perpendicularly arranged inside the platform, and the inner side surface of the guide sleeve is fit to the outer side surface of the pin; the inner side surface of the fixed sleeve is fit to the outer side surface of the guide sleeve; the spring is installed between the inner wall of the lower end of the fixed sleeve and the bottom surface of the pin, and the installation distance is suitable for enabling the upper end surface to be leveled to the platform when the positioning part is pressed into the guide sleeve; a screw hole which is connected and matched with a screw and the lower end surface of the platform is formed in the lower end of one side of the fixed sleeve; a screw hole which is matched with a stop screw and the stop groove is formed in the right end of the other side of the fixed sleeve, and the longitudinal movable distance of the stop groove relative to the stop screw is not smaller than the height of the positioning part. Compared with the prior art, not only can the quality requirement be met, but also the working efficiency is high, and the labor intensity is small.