Half-portal crane with two travelling trolleys and telescopic cantilever beams

Abstract

The invention discloses a half-portal crane with two travelling trolleys and telescopic cantilever beams. A half-portal is composed of an end beam, two main beams and a supporting leg frame; tracks atthe upper portions of the two main beams are connected with the two travelling trolleys; the outer side of each main beam is respectively provided with a steel rail parallel to the track; the two sides of the travelling trolleys are respectively connected with two sets of reverse idler wheel devices, the reverse idler wheel devices hook the steel rails to run; the travelling trolleys are providedwith rotating mechanisms; the lower ends of suspension bar shafts of the rotating mechanisms are connected with cantilever components, and the upper ends of the suspension bar shafts are connected with safe rulers; the cantilever beams in the cantilever components are telescopic beams and composed of multiple sections of bushing beams; the head of each bushing beam is connected with a cable hanger; the tail end of each cantilever beam is connected with an electric block; the cantilever beams are located at the lower portions of the main beams and can stretch out of a workshop to work, and canrotate at any angle in a horizontal plane.

Description

technical field [0001] The application relates to the field of cranes, in particular to a semi-gantry crane with two running trolleys and telescopic cantilever beams. Background technique [0002] Existing bridge cranes are used in enterprise workshops. Some workshops are equipped with many machine tools for processing and production. Products and raw materials need to be transported to the next workshop or other departments in real time; the hooks of the cranes in the workshop are hung from the trolley. For hoisting goods, the trolley can only run back and forth along the double girders of the crane, and the crane can only run back and forth along the cart rails on the cross columns on both sides of the workshop, so that the range of goods that the crane hook can lift is within the distance between the two cart rails in the workshop. Within the plane surrounded by the two ends, when the goods at the edge of the plane need to be hoisted, the hook will be pulled obliquely, an...

AI Technical Summary

Problems solved by technology

[0002] Existing bridge cranes are used in enterprise workshops. Some workshops are equipped with many machine tools for processing and production. Products and raw materials need to be transported to the next workshop or other departments in real time; the hooks of the cranes in the workshop are hung from the trolley. For hoisting goods, the trolley can only run back and forth along the double girders of the crane, and the crane can only run back and forth along the cart rails on the cross columns on both sides of the workshop, so that the range of goods that the crane hook can lift is within the distance between the two cart rails in the workshop. Within the plane surrounded by the two ends, when the goods at the edge of the plane need to be hoisted, the hook will be pulled obliquely, and the items farther away from this plane (such as outside the workshop door, outside the span) cannot be hoisted. At this time, it can only be transferred with the help of other transportation equipment. Usually, the car drives into the workshop to lift the goods under the hook. Go to the hook to hand over the goods, and some set up a special cantilever crane at the workshop door (or workshop aisle) to transfer and dispatch the goods outside the workshop, first hoist the goods into the place where the crane hook of the workshop can reach , and then the cargo is hoisted by the crane to other stations in the workshop. The existing bridge crane used in this working condition cannot directly transfer the cargo with the workshop next door, and must use other transportation equipment to schedule operations, which brings considerable inconvenience. It also wastes manpower and material resources

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