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
2018-09-19
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |