The invention discloses a crane. The crane comprises a crane body and a lower knuckle arm, the lower knuckle arm is connected with the crane body, the upper end of the lower knuckle arm is provided with a lifting adjusting device for lifting a self-loading and unloading oil cylinder, and the lower end of the lower knuckle arm is provided with a lifting fixing device for fixing the self-loading and unloading oil cylinder. The lifting of the jib self-loading and unloading oil cylinder is rapidly and conveniently realized according to different rib height requirements in order to change the vertical height of the oil cylinder in the jib self-loading and unloading process. The crane automatically lifts the height of a lifting point by using the self structure characteristics of the jib without an auxiliary crane on the premise that the height of a transport vehicle at home and abroad is met, so the leasing cost brought by use of the auxiliary crane is avoided, the labor intensity is reduced, the crane is convenient for a user to install, and largest economy values are created for the user.
Crane
2015-12-09
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |
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