| 摘要 |
The invention relates to a concrete distributor mast (10) having a plurality of mast arms (14, 16, 18, 20), which can be moved relative to each other. The mast arms are connected to each other in a hinged manner at coupling points and have in the region of the coupling points hinge points (30), at which drive and coupling members (32, 34, 35) of a coupling gear mechanism that actuates the mast arm movement are coupled in a hinged manner. Situated at the hinge points (30) of the mast arms are hinge components, which span the respective mast arm (18) transversely and define a bearing axis (36). A special feature of the invention is that at least one of the hinge components has a hinge pin (38), which is connected in a rotationally fixed manner to the mast arm (18), projects outwards beyond the mast arm to both sides at the free ends thereof, and is connected in a rotationally fixed manner to the mast arm. On the ends (40) of the hinge pin (38) that project beyond the mast arm, bearing shells (42) are arranged for the rotary bearing of an adjacent drive or coupling member (32, 34) of the coupling gear mechanism. Instead of the hinge pin (38), two hinge pegs (38') that align with each other can also be used as the hinge components. |
