Ratchet Tensioner Lever and Elastic Claw for Anti-Jamming Locking
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Solution Overview
Problem
Existing tensioners have a complex structure and high manufacturing cost due to separate check and locking pawls that require interaction, leading to inefficient operation.
Innovation Solution
An anti-jamming ratchet-type tensioning device with a base, winding and unwinding mechanism, and an operating mechanism that includes a ratchet wheel, lever element, and elastic check claw, allowing for simplified operation and reduced manufacturing costs through a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate check pawl and locking pawl are used, then the tensioner can achieve reliable locking and checking functions, but the structure becomes more complicated and manufacturing cost increases
Solution Approach 1:
The patent combines the check pawl and locking pawl into a single integrated pawl component. This unified pawl structure performs both the checking function (preventing reverse rotation) and the locking function (securing the ratchet wheel at desired positions), thereby reducing structural complexity and manufacturing cost while maintaining reliable operation
Solution Approach 2:
The integrated pawl is designed to perform multiple functions: it acts as both a check pawl (engaging with ratchet teeth to prevent reverse motion) and a locking pawl (securing the mechanism at specific positions). This multi-functional design eliminates the need for separate components, simplifying the overall structure
2Reliability
If separate check pawl and locking pawl are used, then the tensioner can achieve reliable locking and checking functions, but the manufacturing cost becomes high
Solution Approach 1:
By merging the check pawl and locking pawl into a single integrated component, the patent reduces the number of parts that need to be manufactured, assembled, and quality-checked. This consolidation directly lowers manufacturing costs while maintaining the dual functionality of checking and locking
3Reliability
If the elastic check claw is located within the rotation radius of the ratchet wheel, then the ratchet wheel is prevented from rotating back, but the device may experience jamming
Solution Approach 1:
The patent employs an elastic check claw that can dynamically adjust its position and engagement with the ratchet wheel. The elasticity allows the claw to flex during operation, maintaining reliable prevention of reverse rotation while accommodating variations in load and motion, thereby preventing jamming through dynamic adaptation rather than rigid engagement
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 device provides a simple, compact structure with reduced manufacturing costs and improved operational efficiency by using a lever mechanism and elastic check claw to prevent jamming and facilitate smooth winding and unwinding of webbing.
Implementation Method 1
an elastic check claw located within a rotation radius of the ratchet wheel for preventing the ratchet wheel from rotating back
Implementation Method 2
the operating mechanism is rotatably connected with a lever element having two opposite ends, which are respectively configured as a pressing end and an executing end
Data Source
AI summary
The present disclosure provides an anti-jamming ratchet-type tensioning device, which comprises a base which is provided with a winding and unwinding mechanism, wherein the winding and unwinding mechanism comprises a ratchet wheel with gear teeth, and the base is further provided with an operating mechanism; and the winding and unwinding mechanism can be selectively locked or unlocked by the operating mechanism; and the operating mechanism is rotatably connected with a lever element having two opposite ends, which are respectively configured as a pressing end and an executing end.