Excavation Device With Movable Chain Transmission
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Solution Overview
Problem
Existing excavation devices for diaphragms, ditches, trenches, and wells lack precision and continuity, leading to unsuitable structural, foundation, and sealing functions due to imprecision and rotation during excavation.
Innovation Solution
An excavation device with horizontally rotating milling wheels and chain-type transmission driven by motor means, equipped with thrust and guide mechanisms for selective lateral deflection and external excavation action, ensuring continuous and linear excavation with improved anchorage and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional excavation devices are used, then excavation can be performed, but the precision and continuity of the excavation are insufficient, leading to poor linearity and rotation during operation
Solution Approach 1:
The chain-type transmission means is made movable and adjustable through thrust means, allowing it to deflect laterally between a first operating position (inside the bulk of milling wheels) and a second operating position (outside the bulk of milling wheels). This dynamic adjustment enables the device to maintain precision while adapting to different excavation phases, resolving the contradiction between precision and continuity.
Solution Approach 2:
The excavation process is divided into two distinct phases: a first phase where milling wheels perform primary excavation with the chain inside their bulk, and a second phase where the chain deflects outside to perform closing excavation. This segmentation allows each phase to optimize for its specific function, ensuring both precision and continuity throughout the entire excavation process.
2Device complexity
If the chain-type transmission means operates inside the bulk of milling wheels, then compact operation is achieved, but the lateral space outside the milling wheels cannot be effectively excavated
Solution Approach 1:
The chain-type transmission means is equipped with thrust means that enable it to dynamically change its position from inside the bulk of milling wheels to outside the bulk. This dynamic repositioning allows the device to maintain compact operation when needed while expanding lateral coverage during closing excavation, resolving the contradiction between compactness and coverage area.
3Adaptability or versatility
If thrust means are added to deflect the chain-type transmission means, then lateral deflection capability is improved, but device complexity increases
Solution Approach 1:
The thrust means are integrated into the existing chain-type transmission means, allowing the same component to serve multiple functions: power transmission during primary excavation and lateral deflection during closing excavation. This multi-functionality reduces overall device complexity while maintaining adaptability.
Solution Approach 2:
The thrust means are merged with the chain-type transmission means, combining the functions of power transmission and lateral positioning into a single integrated system. This merging eliminates the need for separate positioning mechanisms, reducing device complexity while maintaining lateral deflection capability.
Data Source
Figure 1~2
Figure 3~6
AI summary
An excavation device (10) comprises a pair of milling wheels (13) with a substantially horizontal axis (X) of rotation, each peripherally equipped with excavation means (26), to define an excavation front (24) substantially parallel to the axis (X), chain-type transmission means (25) to draw in rotation, in a first operating condition, each of the milling wheels (13), in which the transmission means (25) is driven by motor means (20) and is also provided, on its side which is external during use, with excavation means (26), and also comprises thrust means (71) able to be activated to selectively move the transmission means (25) into a second operating position, widened and external with respect to the first operating condition.