Boom Foot Pin Guide for Excavator Maintenance
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Solution Overview
Problem
Existing methods for inserting and removing the boom foot pin in hydraulic excavators often result in contact with surrounding structures or pin drop-off due to insufficient support, leading to damage of the pin and surrounding components.
Innovation Solution
A construction machine design that ensures a sufficient pin insertion and removal space on the opposite side of the cabin, with a pin guide provided in this space to guide the boom foot pin during insertion and removal, preventing contact with surrounding structures and drop-off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices are installed at a position apart from the pin insertion and removal line to ensure pin insertion and removal space, then the pin can be inserted and removed without contact with surrounding structures, but the device chamber layout becomes more complex and space utilization decreases
Solution Approach 1:
The device chamber is segmented into distinct functional zones: a pin insertion and removal space separated from the main device installation area by a partition wall. This segmentation allows the pin operation space to be isolated, ensuring safe pin insertion and removal without interfering with other devices, while maintaining organized layout through defined spatial boundaries
Solution Approach 2:
A partition wall is introduced as an intermediary structure between the pin insertion and removal space and the main device chamber. This partition wall serves as a physical barrier that prevents contact between the pin and surrounding structures during insertion and removal operations, while still allowing for efficient space utilization through optimized positioning
2Ease of operation
If a through hole is provided in the working oil tank for pin insertion and removal, then the pin can be accessed, but the tank shape becomes complicated and the tank may be damaged during pin operations
Solution Approach 1:
The pin insertion and removal operation is extracted from the main device chamber and relocated to a dedicated pin insertion and removal space. This extraction eliminates the need to create through holes in the working oil tank, as the pin can be accessed through the partition wall opening in the dedicated space, thereby preserving tank integrity while maintaining operational accessibility
Solution Approach 2:
The partition wall with its opening serves as an intermediary structure that provides pin accessibility without requiring modifications to the working oil tank. The opening in the partition wall allows the pin to be inserted and removed while the tank remains intact, avoiding the complications and damage risks associated with creating through holes in the tank
3Reliability
If the pin insertion and removal space is ensured on the opposite side of the cabin, then the pin can be operated safely, but the overall machine layout becomes more complex
Solution Approach 1:
The upper rotating body is segmented into functional zones with the pin insertion and removal space located on the opposite side of the cabin. This segmentation allows independent optimization of the pin operation area without affecting cabin placement, ensuring safe pin operations while maintaining a logical functional layout through clear spatial separation
Data Source
AI summary
On the laterally opposite side of an upper frame constructing an upper rotating body to a cabin, are installed devices in a state that a pin insertion and removal space sufficient for inserting and removing a boom foot pin in the axial direction is ensured, and in a bracket provided in the pin insertion and removal space, is provided a pin guide in a square tube shape for guiding the boom foot pin in the insertion and removal direction.