MOBILE WORKING MACHINE PROVIDED WITH STABILITY MONITORING

摘要

The invention relates to a mobile working machine, particularly an automatic concrete pump, comprising a device for monitoring the stability when in operation. The working machine comprises an undercarriage (10), which contains a supporting structure with two front and two rear outriggers (20). The outriggers can be extended out of a driving position and into at least one supporting position and each can be supported on a surface (28) by a telescopic supporting jack (26). The working machine additionally comprises a working boom (14), which can be extended out of a driving position and into working positions that project over the undercarriage, which can rotate about a vertical axis that is fixed with regard to the undercarriage, and which is preferably provided in the form of a concrete distributing mast. Measuring devices for determining the respective supporting load are arranged in the area of the supporting jacks and their output signals are sent to a device for monitoring the stability. According to the invention, at least one force sensor (32, 34) is arranged in each supporting jack and is connected in an electrical measuring circuit (36, 38) for outputting a supporting load-dependent measurement signal. The monitoring device comprises an evaluation electronic unit (54) which, in predetermined sampling cycles, can be subjected to the action of supporting jack-related supporting load measured values and, for their comparison, can be subjected to the action of at least one predetermined stability-determining threshold value.