Boom fatigue testing device

The invention relates to the field of engineering machinery, and discloses a boom fatigue testing device, comprising a joint round table (1), the joint round table (1) being for fixing with one end ofthe boom (2); and a loading device (6), the loading device (6) comprising at least two loading mechanisms which are spaced apart in an extending direction of the boom (2) to be fixed with different knuckle arms (21) of the boom (2), respectively. The two adjacent loading mechanisms are respectively fixed on an upper knuckle arm and a lower knuckle arm of the measured knuckle arm. The boom fatiguetesting device of the invention can more realistically simulate the load of the boom under actual working conditions, thereby improving the accuracy of the fatigue test of the boom. 本发明涉及工程机械领域，公开了种臂架疲劳试验装置，包括联接圆台(1)，联接圆台(1)用于与臂架(2)的端固定；加载装置(6)，加载装置(6)包括至少两个加载机构，各加载机构沿所述臂架(2)的延伸方向间隔设置，以用于分别与臂架(2)的不同的节臂(21)固定。其中，相邻的两个所述加载机构分别固定在被测节臂的上节臂和下节臂上。本发明的臂架疲劳试验装置能够更真实地模拟臂架在实际工况下承受的载荷，从而提高对臂架疲劳试验的准确性。