Dual-Sided Ratchet Strap with Self-Locking Cam
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Solution Overview
Problem
Ratchet straps used to secure loads in transportation vehicles often face difficulties due to their configuration, which makes it hard to manipulate the ratchet while reaching over the side of a truck bed or trailer, especially when loads are vertically positioned and close to the rail or trailer sides, limiting the space to couple the hook and requiring difficult adjustments of the strap length.
Innovation Solution
A dual-sided ratchet strap apparatus with a strap cam configured on the ratchet base that locks the cam strap against a cam lock interface, allowing for easy adjustment and secure positioning of the ratchet strap, featuring a continuous or separate cam and ratchet strap system that can be extended and locked in place using a ratchet handle, with a self-locking mechanism for added security and ergonomic design for easier operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ratchet strap is configured with a fixed short strap and extended ratchet strap, then the load can be secured, but the manipulation difficulty increases when reaching over the side of the truck bed
Solution Approach 1:
The patent applies dynamics by making the strap length adjustable through a cam mechanism. The cam can be rotated to different positions to change the effective length of the strap, allowing the operator to adapt the strap configuration to the working conditions. This dynamic adjustment capability resolves the contradiction by enabling easy manipulation when needed while maintaining secure load securing when required.
Solution Approach 2:
The patent changes the parameter of strap length from fixed to variable. By incorporating a cam mechanism that allows rotation to different positions, the effective length of the strap can be adjusted. This parameter change enables the operator to optimize the strap length for both easy manipulation and secure load securing depending on the specific application requirements.
2Ease of operation
If the strap length is made adjustable, then the ease of operation improves, but the device complexity increases
Solution Approach 1:
The cam mechanism is designed to be self-locking through its geometric shape. When rotated to a desired position, the cam's asymmetric profile automatically locks into place without requiring additional locking mechanisms or complex fastening systems. This self-service feature provides easy strap length adjustment while minimizing the increase in device complexity.
Solution Approach 2:
The patent extracts the length adjustment function from a complex multi-component system and implements it through a single cam mechanism. By taking out the essential adjustment capability and implementing it through a simple rotating cam with self-locking geometry, the design achieves ease of operation without proportionally increasing device complexity.
3Ease of operation
If the cam mechanism is added for strap length adjustment, then the ease of operation improves, but the manufacturing complexity increases
Solution Approach 1:
The cam mechanism is designed as a separate, modular component that can be manufactured independently and then assembled to the buckle. This segmentation allows for specialized manufacturing of the cam using optimized processes while keeping the rest of the buckle design relatively simple. The modular approach facilitates easier manufacturing and assembly compared to integrating the cam directly into the buckle housing.
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
Enables easy positioning and secure tightening of the ratchet strap over loads, allowing for adjustments in strap length and secure locking, facilitating easier operation and reduced strain while securing loads, especially in tight spaces.
Implementation Method 1
A cam spring may force the cam handle into an engaged position with the cam surface engaged with the cam lock interface.
Implementation Method 2
A ratchet dog, coupled to the ratchet handle, is configured to engage with the ratchet teeth to index or turn the ratchet buckle and ratchet shaft upon ratcheting of the ratchet handle forward.
Implementation Method 3
The strap cam is configured to lock the cam strap against a cam lock interface to secure the cam strap in position.
Data Source
AI summary
A dual-sided ratchet strap apparatus has a strap cam configured on the ratchet base configured to lock a cam strap against a cam lock interface to secure the cam strap in position. The dual-sided ratchet strap apparatus has the cam strap extension, extending in a first direction from the ratchet buckle and a ratchet strap extension, extending in an opposing direction from the ratchet buckle. The ratchet buckle is actuated by the ratchet handle that can be rotated about the ratchet shaft. The strap cam is self-locking wherein tension from the extended end of the strap cam pulls the cam surface into engagement with the cam lock interface. The cam strap can however be pulled out of the cam interface toward the ratchet buckle to enable quick and easy positioning of the ratchet. The cam handle may be configured to rotate in a ratchet base aperture.