Tensile fatigue test machine for test tube, has mesh type lower and upper chains articulated in rotation around rotational axes that are perpendicular to one another and to traction axis to align test tube on axis

摘要

The machine has a frame (12) carrying a lever (14), and a cylindrical rod shaped test tube (20). Upper and lower rods have ends connected to the frame and the lever by a ball pivot (28) and a yoke joint (34), respectively. The tube has ends mounted on an upper fixation head (42) and a lower fixation head (48) connected by a mesh type upper chain (44) and a mesh type lower chain (50), respectively. The chains are articulated in rotation around rotational axes that are perpendicular to one another and to a traction axis (27) to align a test tube on the axis.