Hoisting Gear Body Drillings for Precise Rope Drum Alignment
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Solution Overview
Problem
The existing hoisting machine arrangements face challenges in aligning gearwheels accurately, leading to rapid wear and increased complexity in assembly and maintenance due to the need for precise shaft alignment and additional components, which complicates the process and increases costs.
Innovation Solution
Drillings are made on the gear body to match the shafts of the driving gearwheel and rope drum, ensuring identical axial lines and correct center distances, eliminating the need for clutches and aligning work, allowing for easier assembly and reducing wear by ensuring proper tooth contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional alignment methods with intermediate branches are used, then shaft angles and distances can be adjusted, but assembly complexity and manufacturing costs increase
Solution Approach 1:
The patent removes the intermediate alignment branch from the system entirely. Instead of using a separate alignment component with precise surfaces, the invention integrates the alignment function directly into the gear body through drillings, eliminating the need for the intermediate branch and its associated complexity
Solution Approach 2:
The patent combines the alignment function with the gear body structure. The drillings in the gear body serve dual purposes: they define the mounting positions for the shafts and simultaneously establish the correct axial alignment and center distances, merging what were previously separate alignment and structural functions
2Manufacturing precision
If precise alignment work is performed during mounting, then shaft positions can be adjusted, but assembly time and labor requirements increase
Solution Approach 1:
The patent performs the alignment function during the manufacturing of the gear body itself, not during assembly. The drillings are precisely positioned and drilled in the gear body before assembly, so that when the shafts are mounted, the correct alignment and center distances are automatically achieved without requiring time-consuming adjustment work during assembly
3Reliability
If additional alignment components are used, then shaft positioning can be improved, but the number of parts and procurement complexity increase
Solution Approach 1:
The patent eliminates the need for intermediate alignment branches and additional positioning components. The alignment function is achieved solely through the drillings in the gear body, reducing the total number of components and simplifying the supply chain while maintaining reliable tooth contact between gearwheels
Data Source
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AI summary
The invention relates to a hoisting machine arrangement (1) comprising a rope drum (2), which has a driven gearwheel (3); a hoisting motor for driving the rope drum; and a gear (5) between the hoisting motor (4) and the rope drum, the gear having a body (6) and a driving gearwheel (7), the driving gearwheel (7) of the gear (5) being coupled to the driven gearwheel (3) of the rope drum (2). The body (6) of the gear has a first drilling (8), which is arranged for fitting a shaft (9) of the driving gearwheel (7); and a second drilling (10), which is parallel to the first drilling (8) and arranged for fitting a shaft of the rope drum (2) or the like (11). The invention also relates to a method for preparing a gear of a hoisting machine arrangement (1 ) of this type.