Construction Cable Winch Spooling Device Tension Control
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Solution Overview
Problem
Construction work devices with cable winches face challenges in achieving high winding quality and minimizing cable wear, especially when the cable is lightly loaded, due to inadequate tensioning and entry angle adjustment.
Innovation Solution
The introduction of a spooling device with a movable guide carriage and adjustable cable entry roller, combined with a cable brake and control system that automatically adjusts tension based on load and cable position, ensures optimal cable tension and entry angle for improved winding quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed cable guide is used, then the device structure is simple, but the cable entry angle cannot be adjusted leading to poor winding quality
Solution Approach 1:
The cable guide is made movable along the cable drum axis instead of being fixed, allowing dynamic adjustment of the cable entry angle. The guide carriage can be positioned at different locations to optimize the winding angle according to the cable drum rotation angle, thereby improving winding quality while maintaining operational flexibility.
Solution Approach 2:
A control system is implemented that detects the cable drum rotation angle and automatically adjusts the cable guide position accordingly. This feedback mechanism ensures the cable enters the drum at the optimal angle during winding operations, significantly improving winding quality without requiring manual intervention.
2Use of energy by moving object
If the cable is lightly loaded, then energy consumption is reduced, but cable tension is insufficient causing cable wear and poor winding
Solution Approach 1:
A tensioning device is introduced as an intermediary mechanism between the cable and the cable drum. This device actively generates and maintains the required cable tension during winding operations, independent of the cable's load. The tensioning device ensures proper cable engagement with the drum surface, preventing cable wear and ensuring high winding quality even when the cable is lightly loaded.
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
This solution achieves high winding quality and low cable wear by maintaining sufficient tension and adjusting the cable entry angle, even when the cable is lightly loaded, resulting in clean and efficient winding.
Implementation Method 1
a cable brake (40) for tensioning the cable (50) in an entry area to the cable drum (14)
Implementation Method 2
a cable entry roller (34) for guiding the cable (50)
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The construction apparatus has a base frame, a mast mounted on the base frame and a winch (10) comprising a rotating cable drum (14) for receiving a cable. The cable winch has a winding device (20). A cable guide roller is provided for guiding the cable. A cable brake is provided for tensioning the cable in an inlet region to the cable drum.