Combined demolition and digging excavator

摘要

The constructional machine for demolition of concrete houses has an undercarriage (3), supporting a superstructure (2), a jib (4), a strut (6), displacement rams (5,7,10), and a work tool (8) at the end. The jib is swivelably and releasably linked to the undercarriage, or superstructural, via the working ram (5) round a joint (11). The jib consists of two part-arms (15,16) interconnected releasably via a rigid plug connection (17) approx. in the middle of the jib, which contains a corresponding plug connection of a shorter, digging jib arm (19). Pref. the plug connection is formed on the jib at the level of an angle (22) of the complete digging jib arm.