Rear supporting leg device of bridge girder erection machine

Abstract

The invention discloses a rear supporting leg device of the bridge girder erection machine. The device comprises a rear supporting leg cross beam, a bottom rotating supporting frame is fixed to the bottom face of the rear supporting leg cross beam, a rear supporting leg cross beam pulley block is installed on the rear supporting leg cross beam, and a rear supporting leg balancing base is fixedly connected to a top plate of the rear supporting leg cross beam pulley block through bolts. An inner sleeve body connecting seat is hinged to the rear supporting leg balancing base through a balancing shaft; rear supporting leg moving hanging wheels move along the bridge girder erection machine main beam, the friction force is small, the effect is good, the bottom rotating supporting frame can be adjusted to be located on the bottom face of the rear supporting leg cross beam according to needs, the bottom rotating supporting frame can be located over the two side wall portions of the box girder,and rear supporting leg cross beam pulley blocks of the two rear supporting legs are located on the rear supporting leg cross beam. The distance between the rear supporting leg cross beam pulley blocks of the two rear supporting legs can be adjusted and increased to guarantee that the distance between the two rear supporting legs is suitable for a box girder connecting block to pass through, thestress and passing requirements are met, and the effect is good.

Description

Technical field: [0001] The invention relates to the technical field of road and bridge equipment, in particular to a rear outrigger device of a bridge erecting machine. Background technique: [0002] In the existing bridge erecting machine, when the rear outrigger device moves along the main girder, it moves along the edge and top surface of the main girder through the polytetrafluoroethylene plate. Easy to move and adjust, poor effect; [0003] At the same time, the rear outrigger device is generally the bottom of the rear outrigger directly hard-connected to the bottom rotating support frame. The bottom surface of the rear supporting leg of the bottom rotating support frame needs to be pressed against the stressed position of the top surface of the box girder of the bridge. That is, on the top surface of the box girder vertically above the two side walls of the box girder, and because the middle part of the bridge erecting machine needs to ensure that the box girder conn...

AI Technical Summary

Problems solved by technology

[0002] In the existing bridge erecting machine, when the rear outrigger device moves along the main girder, it moves along the edge and top surface of the main girder through the polytetrafluoroethylene plate. Easy to move and adjust, poor effect;

[0003] At the same time, the rear outrigger device is generally the bottom of the rear outrigger directly hard-connected to the bottom rotating support frame. The bottom surface of the rear supporting leg of the bottom rotating support frame needs to be pressed against the stressed position of the top surface of the box girder of the bridge. That is, on the top surface of the box girder vertically above the two side walls of the box girder, and because the middle part of the bridge erecting machine needs to ensure that the box girder connecting block can pass through, the distance between the two rear legs of the bridge erecting machine It needs to be large enough, and when the distance is greater than the distance between the two side walls of the box girder, the bottom of the rear outrigger will directly press against the top two flanges of the box girder, and it cannot fully bear the force at this time. Will make the wing plate damaged, the effect is poor

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