SU427511A3 - OVERHEAD CRANE - Google Patents

Description

one

The invention relates to a lifting and transport machinery, namely, bridge cranes, designed to move along laid crane with deviations from predetermined dimensions.

Bridge cranes are known that contain a flying beam with a cargo trolley, as well as traveling trolleys, at least one of which is mounted with the possibility of limited displacement in the axial direction relative to the flying beam.

A distinctive feature of the proposed bridge crane is that at least one of the ends of the span beam is reinforced with a horizontal trunnion on which a guide sleeve is freely attached, connected to the frame of the undercarriage by a vertical axis.

Such an embodiment of the speck provides the possibility of its movement along the runway laid with arbitrary direction deviations.

The invention also provides for the possibility of making a crane with a undercarriage equipped with return springs mounted on its frame, connected to the free end of the trunnion of the span beam.

FIG. 1 shows the end part of a bridge crane, side view; in fig. 2 - end

part of the crane, plan view; in fig. 3 - end part of the crane when the span is tilted relative to the crane runways; in fig. 4 - the same plan view.

The overhead crane contains a flying beam 1, along which the load trolley 2 moves. At the end of the flying beam 1, a horizontal trunnion 3 is fastened, on which a guide bore 4 is freely seated. Finally, it rests on the frame 5 of the undercarriage with which it is also connected with the vertical axis 6

The frame 5 rests on beamless running wheels 7 having convex rims and moving along crane rails 8 laid on I-beams 9.

At the ends of the frame 5, horizontal embedment rollers 10 are mounted, which interact with the side surfaces of the rail 8.

The free end of the trunnion 4 return springs 11 is connected to the frame 5.

When driving along the crane runway, laid with deviations along the span width,

the sleeve 4 together with the undercarriage is displaced along the trunnion 3. Non-parallelism of the crane tracks with a horizontal plane is compensated for by the possibility of rotation of the undercarriage relative to the axis 6. When the opposite crane rails deviate from parallelism in the vertical direction, the undercarriage together with the sleeve 4 is deployed relative to the axle 3.

In the event that, for any reason, when moving the crane, the trolley is distorted relative to the span, this will cause a corresponding increase in the tension of one of the return springs, while simultaneously loosening the other spring. This will help return the crane to its original position and eliminate the skew.

Subject invention

1. Bridge crane containing a flying beam with a cargo trolley, as well as undercarriage, at least one of which

mounted with the possibility of limited displacement in the axial direction relative to the span beam, characterized in that, in order to allow the crane to move along the crane runway laid with deviations from the given dimensions, at least one of the ends of the span beam is reinforced with a horizontal trunnion on which the guide bush freely fits, connected to the frame of the undercarriage by a vertical axis.

2. Bridge crane no. 1, characterized in that the carriage is equipped with return springs mounted on its frame and connected to the free end of the trunnion of the passage beam.

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FIG.