Rope Crane Trolley Three-Point Hoist Support
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Solution Overview
Problem
Conventional trolley designs face challenges with a wide rail gauge due to the moment support arrangement of the hoisting mechanism, leading to a bulky and heavy structure, as the support distance increases, compromising the trolley's width and requiring complex end girder placement.
Innovation Solution
A three-point support system is implemented for the hoisting mechanism, with the first and second support points adjacent to the gear's secondary side on the main beam, and the third support point at the rope drum's end facing away from the gear, allowing for independent rail gauge adjustment and reduced structural complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the moment support is arranged on the end girders at the ends of the load beam, then the moment support is provided, but the rail gauge of the trolley becomes too large
Solution Approach 1:
The patent relocates the moment support from the horizontal dimension (end girders at ends of load beam) to the vertical dimension (main beam above hoisting mechanism). This dimensional shift allows the moment support function to be achieved without increasing the horizontal rail gauge, effectively resolving the contradiction between providing adequate moment support and maintaining a compact trolley width.
2Strength
If the support distance is increased, then the moment support is improved, but the support force decreases
Solution Approach 1:
By moving the moment support to the vertical dimension (main beam above hoisting mechanism), the patent creates a new moment arm without increasing the horizontal support distance. This allows adequate moment support to be achieved while maintaining a shorter overall support distance, thereby preserving sufficient support force.
3Strength
If the moment support is arranged on the end girders, then the moment support is provided, but the structure becomes complicated, bulky, and heavy
Solution Approach 1:
The patent integrates the moment support function into the main beam structure, merging the moment support element with the existing load-bearing component. This eliminates the need for separate end girder structures and their associated protrusions, thereby simplifying the overall structure and reducing complexity and weight.
Solution Approach 2:
The patent extracts the moment support function from the complex end girder assembly and relocates it to a simpler position on the main beam. This separation allows the moment support to be provided independently without requiring the bulky end girder structures, thereby reducing structural complexity.
Data Source
AI summary
A trolley of a rope crane, comprising a trolley body, a transverse load beam of the trolley, a hoisting mechanism and comprises a rope drum, a hoisting motor for driving the rope drum, and a gear for coupling the hoisting motor to the rope drum, whereby the gear has a primary side and a secondary side, and whereby the rope drum is located, in the vertical direction of the trolley, between the hoisting motor and load beam parallel to the load beam. The hoisting mechanism is supported by a three-point support to a main beam, whereby the first support point and second support point are adjacent to the secondary side of a gear, and whereby the third support point is formed by a support of the rope from end facing away from the gear to the load beam at a lateral distance from the first and second support point.