Deep Foundation Excavator Slack-Adjusted Bucket Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing deep foundation excavators face inefficiencies in excavating sand and earth due to the clamshell bucket being halted on the ground, limiting the ability to shovel materials, and the swing link mechanism is too tall for sites with height restrictions.
Innovation Solution
A bucket raising/lowering and opening/closing device with a slack adjustment cylinder and sheaves that allows the clamshell bucket to lower further into the ground by slacking the ropes after landing, enabling efficient excavation and reducing the vehicle's height by allowing the bucket to close under its own weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the raising/lowering cylinder stops lowering the bucket when it lands on the ground, then the raising/lowering rope is prevented from leaving the sheave, but the bucket cannot get into the ground to shovel sand and earth efficiently
Solution Approach 1:
The control unit commands the raising/lowering cylinder to continue lowering the clamshell bucket beyond the ground contact point, creating preliminary slack in the raising/lowering rope. This preliminary action allows the bucket to get into the ground by its own weight, enabling efficient excavation while the control unit monitors and prevents the rope from completely leaving the sheave.
2Productivity
If a swing link mechanism is used to open and close the clamshell bucket, then the bucket can be closed while getting into the ground to enhance excavating efficiency, but the vehicle body height becomes too large for sites with height limitations
Solution Approach 1:
The invention extracts and eliminates the swing link mechanism from the system. Instead of using a swing link to open and close the clamshell bucket, the patent employs a direct cylinder connection that allows the bucket to close while getting into the ground through rope slackening, thereby reducing the vehicle body height to suitable levels for inverted construction sites.
3Stability of the object's composition
If the bucket is halted on the ground, then the raising/lowering system maintains stability, but the bucket cannot shovel a significant amount of sand and earth in one operation
Solution Approach 1:
The invention introduces dynamic control of the raising/lowering cylinder, allowing it to continue moving beyond the static ground contact point. The control unit dynamically adjusts the lowering action to create controlled slack in the rope, enabling the bucket to get into the ground and shovel a significant amount of sand and earth while maintaining system stability through active monitoring and control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances excavating efficiency by allowing the clamshell bucket to shovel a significant amount of sand and earth in one operation while maintaining a compact vehicle height, suitable for sites with height limitations.
Implementation Method 1
the clamshell bucket to get into under the ground by its own weight
Data Source
AI summary
A bucket raising/lowering and opening/closing device (11) of a deep foundation excavator (1) includes a raising/lowering cylinder (12), a first raising/lowering sheave (14) and a first opening/closing sheave (15) that move in an expansion/contraction direction of the raising/lowering cylinder (12), a second raising/lowering sheave (17), a second opening/closing sheave (20), an opening/closing cylinder (18) that moves the second opening/closing sheave (20) to be closer to and to be separated from the first opening/closing sheave (15), a raising/lowering rope (24) that is wound around the first raising/lowering sheave (14) and the second raising/lowering sheave (17), and an opening/closing rope (25) that is wound around the first opening/closing sheave (15) and the second opening/closing sheave (20). In addition, provided are a slack adjustment cylinder (26) that expands and contracts to adjust the slack of the opening/closing rope (25), and a slack adjustment sheave (28) that moves in a direction of being closer to and being separated from the second opening/closing sheave (20) in response to an expansion/contraction movement of the slack adjustment cylinder (26).