Three -dimensional chaining pin

The utility model discloses a three -dimensional chaining pin, including fixed suction cup, fixed suction cup's lower extreme is connected with the thread tightening pole, cavity threaded connecting rod and thread tightening pole threaded connection, first extension bar and cavity threaded connecting rod fixed connection, the first screw thread through -hole that has a plurality of relatively evenly to arrange is opened to the tip of first extension bar along circumference, a side end of second extension bar have with first extension bar inner wall matched with second extension bar go -between, through the cooperation of second extension bar go -between with first extension bar, second extension bar and the cooperation of first extension bar cartridge, pass first screw thread through -hole through the bolt and support the dress on second extension bar go -between, first extension bar and the fixed leading features that is of second extension bar, have and to adjust self length, characteristics such as chainin