초록 ▼

A crane has an upperstructure that is mounted on a carrier by a quick-disconnect turntable mounting. The upperstructure can be transferred from the carrier to a transport, and back to the carrier, by a system that does not require an auxiliary crane. A live mast on the crane is used for positioning

A crane has an upperstructure that is mounted on a carrier by a quick-disconnect turntable mounting. The upperstructure can be transferred from the carrier to a transport, and back to the carrier, by a system that does not require an auxiliary crane. A live mast on the crane is used for positioning a front lift assembly and a rear lift assembly for attachment to the upperstructure. The front lift assembly is connected to the upperstructure frame by boom foot pins, and the rear lift assembly is connected to the frame by the counterweight mounting mechanism. These lift assemblies enable vertical movement of the upper structure, and outrigger jacks on the carrier enable vertical movement thereof. Air pad assemblies are provided between the outrigger jacks and the surface supporting the carrier. These air pad assemblies can also be provided between the lift assemblies and the surface supporting the upperstructure. These assemblies enable horizontal movement of either the carrier or the upperstructure with minimal frictional resistance.

대표청구항 ▼

A crane upperstructure self-transferring system comprising a crane upperstructure frame having a front end and a rear end, a carrier for supporting the crane upperstructure frame, a quick disconnect turntable mounting interconnecting the carrier and the frame for rotation of the frame about a genera

A crane upperstructure self-transferring system comprising a crane upperstructure frame having a front end and a rear end, a carrier for supporting the crane upperstructure frame, a quick disconnect turntable mounting interconnecting the carrier and the frame for rotation of the frame about a generally vertical axis, boom foot pins mounted at the front end of the frame, a front lifting assembly attachable to the frame by the boom foot pins, a counterweight mounting mechanism mounted at the rear end of the frame, a rear lifting assembly attachable to the frame by the counterweight mounting mechanism, said carrier having outrigger support jacks, and an air pad assembly positioned between a surface supporting the carrier and the outrigger support jacks enabling lateral movement of the carrier to align the carrier with the generally vertical axis of the quick disconnect turntable mounting, said front and rear lifting assemblies being operable to transfer said upperstructure frame between a position supported on said carrier and a position spaced from said carrier and supported by other means.