Crane boom structure and crawler crane

The crane boom structure comprises an adjusting support, one end of the adjusting support is hinged to a boom body of the crane, and the other end of the adjusting support is connected to a first hinge point at the joint of a front pulling plate and a rear pulling plate of the crane. The device is used for changing the spatial position of a first hinge point between the front pull plate and the rear pull plate. The installation position of the adjusting support on the knuckle arm of the crawler crane is determined according to a theory or a simulation calculation result, the opening angle can be adjusted according to specific working conditions, the stress state of the arm support in a rotation plane and a variable amplitude plane is improved, the rigidity of the arm support is improved, and the performance of the arm support is fully exerted. 本发明公开了一种起重机臂架结构及履带起重机，包括：调节支架，所述的调节支架的一端铰接于起重机的臂架主体上，调节支架的另一端连接于起重机的前拉板和后拉板连接处的第一铰点，用于改变前拉板和后拉板之间第一铰点的空间位置。本发明调节支架根据理论或仿真计算结果确定其在履带起重机节臂上的安装位置，根据具体作业工况，可调节张开角度，改善臂架在回转平