Integrated Revolving Frame Casting for Hydraulic Excavator Cost Reduction
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Solution Overview
Problem
The manufacturing cost of revolving frames for construction machines increases due to the need for multiple types of swing support and revolving-bearing support portions to accommodate different frame sizes.
Innovation Solution
A revolving frame design that integrates the swing support and revolving-bearing support portions into a single casting block, reducing the need for multiple types and minimizing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the swing support portion and the revolving-bearing support portion are constituted by separate components, then each support portion can be independently designed and manufactured, but the number of types of support portions increases and manufacturing cost increases
Solution Approach 1:
The patent merges the swing support portion and the revolving-bearing support portion into a single integrated support structure. This integration reduces the number of separate components and their types, thereby simplifying the manufacturing process and reducing costs while maintaining the ability to independently design and manufacture the combined support structure.
Solution Approach 2:
The integrated support structure is designed to perform multiple functions simultaneously - supporting both the swing mechanism and the revolving bearing. This multi-functional design allows a single component type to serve multiple purposes, reducing the overall number of component types needed across different revolving frame sizes.
2Ease of operation
If separate swing support portion and revolving-bearing support portion are used, then assembly flexibility is improved, but welding complexity and manufacturing cost increase
Solution Approach 1:
By combining the swing support portion and revolving-bearing support portion into one integrated component, the patent eliminates the need for welding between these two separate parts. This reduces welding complexity and manufacturing cost while the integrated structure is designed to maintain assembly flexibility through standardized interfaces with other components.
3Adaptability or versatility
If multiple types of support portions are prepared for different revolving frame sizes, then adaptability to different sizes is improved, but inventory complexity and cost increase
Solution Approach 1:
The integrated support structure is designed with universal characteristics that allow it to be adapted to different revolving frame sizes. By combining multiple functions into a single component and using standardized interfaces, the same basic design can serve multiple size variations, reducing the number of unique component types needed in inventory while maintaining size adaptability.
Data Source
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AI summary
[Problem] A revolving frame and a work machine including the revolving frame, which can avoid an increase in the number of types of swing support portions and revolving-bearing support portions in correspondingly to the revolving frames having different sizes, and can reduce a manufacturing cost are provided. [Solution] A revolving frame of a hydraulic excavator as a work machine has a revolving-bearing support portion which supports a revolving bearing and a swing support portion which supports the work machine swingably in a width direction of a machine body and includes a first block. The first block is a casting integrally having the revolving-bearing support portion and the swing support portion.