A telescopic boom extension device (10) includes a driving mechanism. The driving mechanism that drives B pins (26-30) and a C pin (34) includes a hydraulic supply part (18) and a drive source generation part (19). The drive source generation part generates a predetermined hydraulic pressure at the hydraulic supply part based on a pneumatic pressure. The hydraulic supply part has an accumulator and AOHs and supplies a hydraulic pressure to a cylinder-boom coupling mechanism (15) and an inter-boom fixing mechanism (16). The drive source generation part uses a pneumatic supply part (41) to send compressed air to the hydraulic supply part.
TELESCOPIC BOOM EXTENSION DEVICE
TELESKOPISCHE AUSLEGERVERLÄNGERUNGSVORRICHTUNG
DISPOSITIF DE PROLONGEMENT DE MÂT TÉLESCOPIQUE
19.09.2018
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |