Turnbuckle Locking Mechanism for Vibration-Resistant Lashing
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Solution Overview
Problem
Existing turnbuckles used for securing lashing rods on cargo ships are prone to unintended loosening due to ship vibrations, and existing solutions are complex, costly, and susceptible to operational disturbances like corrosion and detritus.
Innovation Solution
A turnbuckle design featuring a locking mechanism that automatically engages due to gravity, with a cylindrical sleeve sliding on a vertical bar, allowing the lashing bar to extend to the screw rod's top without obstruction, and positioned off the screw rod's imaginary extension, ensuring the locking mechanism does not interfere with length adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex locking mechanisms with multiple moving parts are used to prevent unintended loosening, then reliability against vibration is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts the essential locking function from complex multi-component mechanisms and implements it through a single integrated locking means that slides along the screw rod. This simplifies the device by removing unnecessary moving parts while maintaining the core function of preventing unintended loosening during vibration.
Solution Approach 2:
The locking means is designed to automatically engage and disengage based on the operational state of the turnbuckle. During tightening, the locking means is pushed away from the retainer; during loosening or vibration, it automatically engages with the retainer to prevent unintended movement, eliminating the need for external control mechanisms.
2Reliability
If locking mechanisms with springs and small parts are used to prevent loosening, then reliability is improved, but susceptibility to operational disturbances from detritus and corrosion increases
Solution Approach 1:
The invention removes springs and other small susceptible parts from the locking mechanism, replacing them with a simple sliding locking means that has no internal moving components. This extraction eliminates the vulnerability to detritus accumulation and corrosion that plagues spring-based mechanisms in marine environments.
Solution Approach 2:
The locking means is designed as a simple, robust component with no delicate internal mechanisms. While individually simple, the overall mechanism achieves long service life by eliminating components that would require maintenance or replacement due to corrosion or detritus accumulation.
3Device complexity
If locking means is positioned on the imaginary extension of the screw rod, then locking function is simplified, but it interferes with the extension of the lashing bar to the screw rod top
Solution Approach 1:
The locking means is positioned laterally offset from the imaginary extension of the screw rod, utilizing a different spatial dimension. This lateral positioning allows the locking means to engage with a corresponding retainer on the screw rod while leaving the central extension path clear for the lashing bar to reach the top of the screw rod without interference.
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
The solution provides an automatic, reliable, and cost-effective locking function that prevents loosening due to ship vibrations, maintaining tightness while allowing for a larger range of length adjustment and a more compact structure.
Implementation Method 1
the locking means is shaped and dimensioned in such a way that it is possible for the bottom end of a lashing bar connected to the turnbuckle to extend in its extreme position up to the top end of the screw rod without the locking means preventing this
Implementation Method 2
the locking means is a cylindrical sleeve installed on a vertical bar and sliding in the direction of the vertical bar
Data Source
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AI summary
Mechanism for locking a turnbuckle, which turnbuckle comprises a screw rod (1) provided with a thread, and a frame part (2) that is provided with a corresponding thread and is rotatable in relation to the screw rod, which frame part has vertical bars (3, 4), and on the top end of which screw rod (1) a retainer (8) is installed. The invention is implemented in such a way that installed on at least one vertical bar (3, 4) is a locking means (10) that slides in the direction of the vertical bar, and that in its locking position collides with the retainer (8) on the screw rod (1) and prevents movement of the frame part (2) around the screw rod (1).