Concrete pump truck boom and concrete pump truck

摘要

A concrete pump truck boom having a folded state and an unfolded state, wherein said boom comprises seven boom sections (21-27) articulated in sequence, in said folded state, the first (21) and the second (22 ) pen sections of said pen sections are located in a first longitudinal plane (P), and from the fourth (24) to the last (25, 26, 27) pen sections are in a second longitudinal plane (T) , the first longitudinal plane (P) and the second longitudinal plane (T) are parallel to each other and are separated by a predetermined interval (D), the third pen section (23) extends between the first longitudinal plane (P) and the second longitudinal plane (T), the first to the fifth pen sections (21-25) are arranged to fold in a first direction (V1), and the sixth pen section (26) and the seventh pen section (27 ) are arranged to fold over the fifth pen section (25) in a second direction (V2) inverse with respect to the first direction (V1), so that an outer surface (20) of the sixth (26) and the seventh (27) pen sections face an outer surface (20) of the fifth pen section (25), wherein the sixth (26) and seventh (27) pen sections are arranged in a linear fashion and folded together over the fifth pen section (25).