CN212198213U - Multipoint support bridge crane - Google Patents

Abstract

The utility model provides a bridge crane is supported to multiple spot, it increases a N on basic bridge crane basis and fixes the last track in the house structure, drive dolly of installation on every track, every drive dolly links together through a girder connecting rod and girder and constitutes the strong point, the simply supported beam stress state that the girder leaned on two end beam supports has been changed, form many supporting beam atress, thereby greatly reduced the girder to the requirement of rigidity and intensity, realize bridge crane's lightweight manufacturing.

Description

Multipoint support bridge crane

Technical Field

The utility model relates to a gantry crane technical field specifically is a novel bridge crane.

Background

The gantry crane is a common hoisting device in enterprises, and is widely applied to factories, mines and docks. The common bridge crane consists of an end beam, a main beam, a trolley winch and the like, wherein the main beam is one of the main stressed components of the bridge crane. The rigidity and the strength of the main beam are directly related to the safety performance of the crane, and the main beam is usually formed by welding steel plates into a box body. Because the bridge crane span is great, current bridge crane atress relies on the girder completely and is located the end beam of girder both sides and undertake, and two end beams support the mechanical structure that the girder formed the simple beam. In order to ensure that the crane has enough rigidity and strength requirements, the height and width of the main beam must be enough during manufacturing, and the rigidity and strength of the crane can meet the specified requirements. For the bridge crane of a large-span and low-clearance factory building, the large size of the main beam not only brings more main beam manufacturing materials and increases the self weight of the main beam, but also limits the installation space of the main beam, reduces the lifting height and integrally promotes the manufacturing cost of the crane.

In order to solve the technical performance problem of the bridge crane, current research focuses on reducing the weight of the whole crane and realizing light weight manufacturing by changing the structure of the main beam and using a new high-strength material under the condition of meeting the requirements on the rigidity and the strength of the main beam.

In the research, the bending moment and bearing capacity of the main beam are reduced by changing the supporting and bearing structure of the whole crane, so that the lightweight transformation of the bridge crane is realized.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the main structure of the current bridge crane is kept, meanwhile, the integral stress structure of the bridge crane is changed, the supporting points for the main beam are additionally arranged, the supporting force of the new supporting points is used for partially offsetting the self weight of the main beam and the gravity of a lifted object, the stress condition of the main beam of the crane is optimized, and the maximum bending distance generated on the main beam by the self weight of the main beam and the gravity of the lifted object is reduced, so that the requirements on the rigidity and the strength of the main beam are reduced, and the aim of lightweight manufacturing of the bridge-gate crane is further realized.

The utility model provides a technical scheme that prior art is not enough provided is: a kind of multipoint supports the bridge crane, characterized by: the basic bridge crane is composed of two end beams (1, 3) on a left bearing track and a right bearing track, a main beam (2) installed on the end beams and a trolley (4) installed on the main beam, N upper tracks (5) fixed on a house structure are additionally arranged on the basis, an upper driving trolley (6) is installed on each track, each driving trolley is connected with the main beam through a main beam connecting rod (7) to form 1 upper supporting point, N upper supporting points are distributed on the main beam in a shared mode, and N is an integer greater than or equal to 1.

The main beam connecting rod (7) which plays a role in connecting the upper driving trolley (6) and the main beam (2) adopts a flexible connecting rod.

The utility model discloses an useful part is: the utility model discloses N strong point has been increased above the bridge crane girder, provides N ascending support pulling force for the girder becomes N point type by original point-to-point support and supports, has offset the girder dead weight and has lifted by crane the heavy roll-off that produces the girder of thing, makes the girder can utilize littleer rigidity and intensity safety to lift by crane bigger weight. The size of the main beam box body is reduced, the self weight of the main beam is reduced, light-weight production is realized, and the manufacturing cost is saved. Is particularly suitable for bridge cranes with large span and super large span.

Drawings

FIG. 1 is a schematic view of a special example of a multi-point supporting bridge crane with N equal to 1; in the figure: (1) the device comprises a left end beam, a crane main beam, a right end beam, a crane trolley, an upper rail, an upper driving trolley and a connecting rod, wherein the rail is fixed with a factory building structure, the upper driving trolley is arranged on the upper rail, and the connecting rod is arranged between the upper driving trolley and the main beam.

Detailed Description

Referring to fig. 1, a special structural schematic diagram of a multi-point support bridge crane with N equal to 1 is shown, wherein two end beams (1, 3) which are bilaterally symmetrical, a main beam (2) which is transversely installed and a hoisting trolley (4) are installed on the main beam to form the bridge crane with a basic structure; an upper track (5) is fixed on the main beam together with the house, an upper driving trolley (6) is arranged on the upper track and connected with the main beam through a connecting rod (7) to provide an upward supporting point for the main beam, and supporting force generated by the supporting point offsets the dead weight of a part of the main beam and the gravity of a heavy object lifted by the hoisting trolley, so that the bearing load of the main beam is greatly reduced. Meanwhile, the supporting force and the force arm of the main beam form an upward bending moment to offset a downward bending moment generated by part of the crane trolley and the heavy object to the main beam, so that the integral bending moment load borne by the main beam is reduced. By adopting the stress structure, the requirement of rated load capacity on the bending moment of the main beam is reduced, and the requirement on the overall rigidity and strength of the main beam is also reduced, so that the structural strength requirement of the main beam is greatly reduced, the size and the dead weight of a box body of the main beam are reduced, and the lightweight manufacture of the crane is realized.

Claims (2)

1. A kind of multipoint supports the bridge crane, characterized by: the basic bridge crane is composed of two end beams (1, 3) on a left bearing track and a right bearing track, a main beam (2) installed on the end beams and a trolley (4) installed on the main beam, N upper tracks (5) fixed on a house structure are additionally arranged on the basis, an upper driving trolley (6) is installed on each track, each driving trolley is connected with the main beam through a main beam connecting rod (7) to form 1 upper supporting point, N upper supporting points are distributed on the main beam in a shared mode, and N is an integer greater than or equal to 1.

2. A multi-point support bridge crane as claimed in claim 1, wherein: the main beam connecting rod (7) which plays a role in connecting the upper driving trolley (6) and the main beam (2) adopts a flexible connecting rod.

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