Frame structure for lift crane machinery
First Claim
1. For use with a crane having upper and lower works, a boom and load lifting assembly mounted on said upper works, boom and load hoist machinery mounted on said upper works, wherein the improvement is a frame structure for supporting the boom and load hoist machinery comprising:
- a pair of spaced apart parallel frame members;
each of said frame members including a pair of substantially vertical side plates spaced apart by at least one elongate lateral cross piece, each pair of side plates including integral, parallel flange sections extending upwardly and located above said cross piece, means for interconnecting said frame members;
each pair of said flange sections of each frame member include spaced apart mounting locations for directly mounting and supporting one side of said boom and load hoist machinery, said boom and load hoist machinery spanning a region between said frame members;
said mounting locations including apertures formed in said flange sections, fastening members for interconnecting said boom and load hoist machinery with said apertures;
drip pans extending laterally from said frame members and located below said flange sections, said drip pans being operative to received discharged material from said boom and load hoist machinery;
a portion of each frame member below said cross piece forming an integral housing;
an extendable beam slidably supported within each of said housings;
actuating means for extending and retracting said beams with respect to said frame members; and
a counterweight assembly attached to said beams, such that extending and retracting said beams by said actuating means moves said counterweight assembly relative to said upper and lower works.
1 Assignment
0 Petitions
Accused Products
Abstract
A lift crane having enhanced lifting capability includes a self-installing counterweight system which utilizes actuators forming part of a counterweight assembly for raising the counterweight to an operative position with respect to the rear of the crane. A pair of slidable counterweight beams are slidably supported within main frame members forming part of the upper works of the crane and have their outer ends attached to the counterweight. Fluid pressure operated actuators within the frame members extend and retract the beams in order to move the counterweight rearwardly with respect to the rear of the crane. The upperworks also includes spaced-apart, parallel frame members each having a pair of spaced-apart vertical side plates with integral flange sections extending upwardly. The flanged sections include mounting locations for hoist machinery which utilize pins for easily mounting and dismounting the equipment. Drip pans including drain plugs are provided and located below machinery components that are likely to discharge fluid.
84 Citations
2 Claims
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1. For use with a crane having upper and lower works, a boom and load lifting assembly mounted on said upper works, boom and load hoist machinery mounted on said upper works, wherein the improvement is a frame structure for supporting the boom and load hoist machinery comprising:
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a pair of spaced apart parallel frame members; each of said frame members including a pair of substantially vertical side plates spaced apart by at least one elongate lateral cross piece, each pair of side plates including integral, parallel flange sections extending upwardly and located above said cross piece, means for interconnecting said frame members; each pair of said flange sections of each frame member include spaced apart mounting locations for directly mounting and supporting one side of said boom and load hoist machinery, said boom and load hoist machinery spanning a region between said frame members; said mounting locations including apertures formed in said flange sections, fastening members for interconnecting said boom and load hoist machinery with said apertures; drip pans extending laterally from said frame members and located below said flange sections, said drip pans being operative to received discharged material from said boom and load hoist machinery; a portion of each frame member below said cross piece forming an integral housing; an extendable beam slidably supported within each of said housings; actuating means for extending and retracting said beams with respect to said frame members; and a counterweight assembly attached to said beams, such that extending and retracting said beams by said actuating means moves said counterweight assembly relative to said upper and lower works. - View Dependent Claims (2)
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Specification