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Automatic equalization device for wheel pressure of trolley of double-girder crane

A double-girder crane, automatic balancing technology, applied in the direction of traveling mechanism, transportation and packaging, load hanging components, etc., can solve the problems of trolley wheel wear, safety hazards, damage, etc.

Inactive Publication Date: 2018-11-16
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This also caused the actual maximum wheel pressure to far exceed the design value, causing wear and damage to the wheels of the trolley, and affecting the main beam, and also burying a major safety hazard

Method used

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  • Automatic equalization device for wheel pressure of trolley of double-girder crane
  • Automatic equalization device for wheel pressure of trolley of double-girder crane
  • Automatic equalization device for wheel pressure of trolley of double-girder crane

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Embodiment Construction

[0022] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] see figure 1 and figure 2 , in an ideal state, the wheels under the four fulcrums of the bridge crane trolley are in effective contact with the track, and the wheel pressure values ​​at each fulcrum are the same, and the wheel pressure values ​​are as follows.

[0024] P A =P B =P C =P D =(1 / 4)×P V , P V =P Q +P Gx .

[0025] where P Q is the lifting load, P Gx is the self-weight load of the trolley.

[0026] When the trolley has a point suspended in the air, assuming that the A fulcrum is the suspended point, the wheel pressure value of each fulcrum can be calculated as follows.

[0027] P' A =P' C =0,P' B =P' D =(1 / 2)×P V .

[0028] At this time, the entire gravity is almost only borne by the wheels at the two fulcrums, which also causes the actual maximum wheel pressure to far exceed the design value, causing wear...

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Abstract

The invention provides an automatic equalization device for the wheel pressure of a trolley of a double-girder crane, belonging to the technical field of engineering machinery. The automatic equalization device comprises a hinged support, an equalizing beam, a crankshaft and a cross bar. The crankshaft is connected with the hinged support and the equalizing beam through column hinges; a main shaftjournal and an equalizing beam hinge hole are concentric, so vertical height adjustment within a certain range can be carried out on the equalizing beam and a wheel set on each fulcrum; and thus, thephenomenon of three fulcrums during the operation of the trolley can be effectively avoided. At the same time, the crankshaft and the cross bar form a four-bar linkage mechanism, and real-time equalized stress of two fulcrums at the same side is guaranteed in virtue of the characteristics of the linkage mechanism and the lever principle, so two wheel pressure fulcrums on the same rail are equalized, the situation of wearing and destroy of wheels due to too great wheel pressure in the case of three-fulcrum operation of the trolley is avoided, and the service life of the trolley of the crane isprolonged.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an automatic pressure equalization device for trolley wheels of a double-girder crane. Background technique [0002] Double-girder cranes generally refer to double-girder bridge cranes, but also include other types of cranes such as gantry cranes. The bridge crane is a lifting device that is horizontally placed over the workshop, warehouse and stockyard for material lifting. The crane trolley is placed on the guide rail of the bridge frame and can move along the width direction of the workshop. The trolley is mainly welded by steel plates, and consists of a trolley frame, a trolley moving mechanism and a lifting mechanism on it. [0003] At present, most crane trolleys adopt a four-point structure, which has good symmetry, good manufacturability and high overall stability. The wheel pressure distribution of the four-pivot structure is statically indeterminate, and the dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C9/12
CPCB66C9/12
Inventor 秦义校韩跃煌谷金朋霍东敏李博伦
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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