RU2272780C2 - Bridge support crane - Google Patents

Abstract

FIELD: load-lifting machinery; bridge cranes.

SUBSTANCE: proposed crane has framework in form of main beams attached to end beams resting of running wheel clusters, one of end beams being rigidly secured on main beams. Main beams are attached to lower belts of end beams by means of shafts arranged along direction of crane movement and combined connecting plates arranged on said shafts and installed on main and end beams. Bars welded to upper belts from one side of main beams provide rigid connection of one of said end beams and main beams. Clearance is formed between lower belt of other end beam and upper belts of main beams from other side to proving rocking of said end beam.

EFFECT: simplified design of crane.

2 cl, 6 dwg

Description

The invention relates to the field of hoisting machines, namely to bridge cranes.

Known bridge overhead crane (copyright certificate 498254 class. In 66 C 17/00, 11/23/73,), containing a span, with a moving trolley, pivotally mounted on the lower belts of the end beams.

The span of this crane is connected to the end beams so that they cannot move relative to each other, as is done in cranes, for example, a.s. 604802 cells B 66 C 17/00, 06/17/76 and A.S. SU 1685856, class B 66 C 5 / 00.17 / 00, 02/13/89, SU 1402548 A1 class B 66 C 5/00 05/27/87, SU 1310329 A1 class. B 66 C 17/00 10/29/85

Since the span of this crane is always constant, this can lead to accelerated failure of the running wheels, damage to tracks and crane structures and affect the reliability of the crane.

The closest analogue in technical essence is SU 1031882 A class. In 66 C on 17/00, 30, 07/19/83, containing a span in the form of main beams attached to end beams resting on blocks of running wheels, one of the end beams attached to the main rigidly and the other movably. However, the design of this crane is quite complicated.

The technical task of the present invention of the model is to simplify the design.

The problem is solved in that the main beams are attached to the lower belts of the end beams by means of shafts located along the direction of movement of the crane and combined connecting washers mounted on these shafts mounted on the main and end beams, and bars are welded to the upper belts on one side of the main beams providing a rigid connection of one of the mentioned end beams with the main beams, and between the lower belt of the other end beam and the upper belts of the main beams on the other side of the last images n gap to allow rocking of the end beams.

One of the connecting washers is attached to the supporting elements of the end beams made in the form of plates welded to the lower belts of the end beams placed along the main beams, and connected to the ribs made also in the form of plates located along the end beams, and the other connecting washers are attached to main beams.

The invention is illustrated by drawings, where:

figure 1 shows a bridge crane;

figure 2 is a view A (top) of figure 1;

figure 3 is a view of B (left) in figure 1;

figure 4 - section bb in figure 2 (rigid connection of the main and end beams);

in Fig.5 is a section GG in Fig.2 (connection of the main beam and the end beam with the possibility of limited swing);

in Fig.6 is a view D in Fig.2 (section along the axes of the shafts connecting the main and end beams).

The bridge crane (Fig. 1) contains a span 1 in the form of main beams, end beams 2, supported by blocks of driving gear 3 and idle 4 wheels (Fig. 3) mounted on a crane rail 5. On the upper belt of the span 1 is located freight trolley 6.

The span 1 is attached to the end beams 2 by means of washers 7 and 8 (figure 5), combined on the shafts 9 and located along the direction of movement of the crane. Washers 7 are installed on the main beams 1 of the superstructure at a distance equal to the track of the crane runways. Washers 8, which ensure the accuracy of the installation of the end beam, are attached to the supporting elements 10 (Fig. 4), which are made in the form of plates and placed along the main beams 1, welded to the lower belts of the end beams 2 and to the ribs 11 located along the end beams. The bars 12 (Fig. 4), mounted on one side on the vertical walls of the main beams 1, provide a rigid connection of the beams 1 and 2.

The bars 13 (figure 5) mounted on the main beams on the other hand, provide a connection of the beams 1 and 2 with the possibility of limited swing of the latter.

During the operation of electric bridge cranes of the proposed design, it is possible to run over the flanges of the wheels of the end beam, rigidly connected with the main beams, on the side surfaces of the rails of the crane runways. In this case, the work of the drives on movement across the crane ways of part of the mass of the crane with the coefficient of friction - slip, and the other part of the mass with the coefficient of rolling is necessary.

It is possible to hit the flange of the wheels of the end beam with the possibility of limited swing on the side surfaces of the rails of the crane tracks. In this case, work is required to rotate the end beam under a load of part of the mass, and there is no lateral movement of the movement of the entire mass of the crane.

The operation of the drives and the wear of the flanges of the wheels of the end beams of the proposed crane design in both cases is significantly less than that of similar ones.

Claims (2)

1. A bridge crane containing a span in the form of main beams attached to end beams resting on blocks of running wheels, one of the end beams being fixed to the main beams, characterized in that the main beams are attached to the lower zones of the end beams by means of shafts, located along the direction of movement of the crane, and on these shafts combined connecting washers mounted on the main and end beams, and bars are welded to the upper chords on one side of the main beams, providing rigid connection of one of said end beams to the main beam and between the bottom chord of the other end of the beam and the upper belts of the main beams on the other side of the last gap is formed to allow the oscillation of the end of the beam. 2. The crane according to claim 1, characterized in that one of the connecting washers is attached to the supporting elements of the end beams made in the form of plates welded to the lower zones of the end beams placed along the main beams and connected to the ribs, also made in the form of plates, located along the end beams, and other connecting washers are attached to the main beams.

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