| 摘要 |
A turning joint structure of a crane is provided to prevent damage to main functional articles by preventing damage to a seal by efficiently separating different working fluid. A turning joint structure of a crane includes hydraulic connecting units(P1~P7), air pressure connecting units(A1~A4), antifreezing solution connecting units(H1,H2), working fluid drain connecting units(D1,D1-1), an antifreezing solution drain connecting unit(D2), a working fluid discharge connecting unit(T), and a grease supply connecting unit(GS). The hydraulic connecting units transmit oil pressure to a hub(1) fixed to a turning unit. The air pressure connecting units transmit air pressure. The antifreezing solution connecting units transmit antifreezing solution. The working fluid drain connecting units drain antifreezing solution. The antifreezing solution drain connecting unit drains the air pressure and the antifreezing solution. The working fluid discharge connecting unit discharges oil. The grease supply connecting unit supplies lubricating oil to a shaft friction unit(Z). The antifreezing solution connecting unit is installed under the air pressure connecting units. The antifreezing solution drain connecting unit is installed between the air pressure connecting units and the antifreezing solution connecting units to prevent erroneous operation due to damage to an air pressure seal. |
