Boom Drive Layout for Wider Excavator Working Range
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Solution Overview
Problem
Existing construction machines, such as excavators, have limited working areas due to the restricted rotation range of their work mechanisms, which hinders their operational efficiency and versatility.
Innovation Solution
A construction machine equipped with a drive device that outputs torque centered on rotational axes orthogonal to the vehicle body, allowing booms and arms to rotate extensively, and slewing devices that enable 360-degree rotation of connecting members, enhancing the working range and flexibility of the machine's attachments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the boom is rotated only to one side with respect to the reference axis, then the structure is simpler, but the working area is limited
Solution Approach 1:
The drive device is designed to dynamically rotate the boom to both one side and other side with respect to the reference axis, enabling the boom to move in multiple directions. This dynamic capability allows the construction machine to cover a larger working area while maintaining a relatively simple drive device structure through versatile motion control
2Adaptability or versatility
If the work mechanism is configured for extensive rotation, then the working range is expanded, but the structural complexity increases
Solution Approach 1:
The slewing device is designed with multi-functionality to rotate connecting members 360 degrees around the vertical axis while also enabling the boom to rotate to both sides of the reference axis. This universal rotation capability allows a single slewing device structure to achieve extensive working range and operational versatility without requiring multiple separate mechanisms
Data Source
AI summary
A construction machine includes: a drive device outputting torque centered on a rotational axis perpendicular to a reference axis extending in upper and lower directions of a travelable vehicle body; and a boom having a first end portion coupled to the vehicle body, the boom being rotated around the rotational axis by the torque from the drive device. When viewed in a first direction parallel to the rotational axis, the boom is rotatable to both one side and other side with respect to the reference axis.