Abstract: The invention relates to a mudguard (38) for motor vehicles, in particular for mobile concrete pumps. The mudguard (38) has a dirt trap (42) which partially extends over the running surfaces of wheels of the mobile working machine, and fastening means (40) for fixing the dirt trap to a point on the working machine which is fixed to the chassis. According to the invention, the mudguard (38) is in the form of a plastic self-supporting hollow chamber component which has a dirt trap part (42) and a flange part (44) which is integrally connected to said dirt trap part, wherein the flange part (44) has a plurality of transverse apertures (46), which are arranged in a grid-like fashion in relation to one another, for holding the fixing means (40).

Abstract: A mobile concrete pump including a building frame (22) arranged on the structure (12) of a truck chassis (10). The building frame (22) includes two longitudinal side members (50) mutually spaced apart by a free space (52) and resting on the chassis structure (12). The mobile concrete pump further comprises a driving assembly (42) for actuating the functional units, which are arranged with the core pump (24) in the free space zone (52) located between the two longitudinal side members (50). At least the core pump can be easily mounted and dismounted from the building frame (22). For this, the building frame (22) is provided with a floating bearing (54) which links the side members across the free space, as well as a fixed bearing (56) arranged at the rear end of the building frame and serving to support releasably the core pump (24) which is pre-assembled in modular manner.

Abstract: The invention concerns a mobile concrete pump comprising a building frame (22) arranged on the structure (12) of a truck chassis (10) and serves to maintain a supporting device (38), a core pump (24) and functional units which form a distribution mast (36). The building frame (22) comprises two longitudinal side members (50) mutually spaced apart by a free space (52) and resting on said chassis structure (12). Said mobile concrete pump further comprises a driving assembly (42) for actuating the functional units, which are arranged with the core pump (24) in the free space zone (52) located between the two longitudinal side members (50). The invention aims at providing a mobile concrete pump whereof the building frame (22) can be easily mounted and dismounted.