Revolving Frame Corner Reinforcement for Excavator Stability
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Solution Overview
Problem
Conventional construction machines, such as hydraulic excavators, face challenges in supporting the working mechanism's reaction forces without increasing plate thickness, leading to potential twisting deformation and weight imbalance, which affects performance and manufacturing costs.
Innovation Solution
The implementation of reinforcing members at the corner portions between the vertical plates and the front plate creates a firm support structural body without increasing plate thickness, providing a closed space to prevent water intrusion and rusting, while allowing for a larger installation space and improved structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the plate thickness dimension is increased to improve strength, then the strength of the vertical plates and front plate is improved, but the weight of the hydraulic excavator increases
Solution Approach 1:
The invention transitions from increasing plate thickness (one-dimensional solution) to adding reinforcing members at corner portions (spatial/dimensional solution). The reinforcing members are positioned at the corner portions where vertical plates and front plate intersect, creating a three-dimensional reinforcement structure that improves strength without increasing the plate thickness dimension.
Solution Approach 2:
The reinforcement structure is segmented into multiple discrete reinforcing members positioned at specific corner portions, rather than uniformly increasing the thickness of entire plates. This segmentation allows targeted reinforcement at critical stress points while maintaining lighter overall weight.
2Reliability
If the plate thickness dimension is increased to withstand large load, then the stability of support is improved, but the manufacturing cost rises
Solution Approach 1:
Instead of uniformly increasing plate thickness throughout, the invention applies reinforcement locally at the corner portions where vertical plates and front plate intersect. These corner portions are the critical areas subjected to highest stresses from excavating reaction forces, so localized reinforcement provides the necessary stability while minimizing material usage and manufacturing cost.
3Stability of the object's composition
If the plate thickness dimension is increased to prevent twisting deformation, then the rigidity is improved, but the working performance deteriorates
Solution Approach 1:
The invention addresses rigidity requirements by adding reinforcing members in the spatial dimension at corner portions, rather than increasing plate thickness. This dimensional approach prevents twisting deformation caused by swing of the working mechanism while maintaining the weight and working performance characteristics.
Data Source
AI summary
A revolving frame is provided with left and right vertical plates installed upright on a bottom plate, and a front plate arranged on a front side of the bottom plate and connecting the left and right vertical plates to each other. A left reinforcing plate is provided at a corner where the left vertical plate and the front plate cross each other, and a right reinforcing plate is provided at a corner where the right vertical plate and the front plate cross each other. As a result, the corner portion where the left vertical plate and the front plate cross each other is reinforced by the left reinforcing plate while a left side closed space (LS) is formed, and the corner portion where the right vertical plate and the front plate cross each other is reinforced by the right reinforcing plate while a right side closed space (RS) is formed.