The utility model relates to the technical field of
tunnel construction equipment, and discloses a tunnel arch support multifunctional boom
assembly which comprises a three-section type telescopic boom, a two-section type telescopic boom and a support
assembly. The three-section type telescopic arm frame is formed by nesting a basic arm, a second-section arm and a third-section arm. A telescopic oil cylinder is arranged in the third-section arm, the left end of a cylinder rod extends out to be connected with the basic arm, and the left end of a cylinder
barrel extends out to be connected with the second-section arm. The right end of the cylinder
barrel is connected with an oil cylinder
pulley block which is matched with an extending steel
wire rope to realize the telescopic function of the boom; one end of the two-section telescopic boom is connected with the three-section telescopic boom through the connecting
assembly, and the other end of the two-section telescopic boom is connected with the supporting assembly. The supporting assembly comprises a breaking hammer, a supporting frame and a gripper. According to the device, a composite telescopic scheme is adopted, the structure is simplified, synchronous telescopic of the three-section type telescopic arm is guaranteed, multiple systems are integrated to achieve multi-dimensional movement and function combination, the requirement for supporting full-
process operation is met, and the equipment universality and construction efficiency are remarkably improved.