Winch Clutch Assembly for Load Retention and Release
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Solution Overview
Problem
Existing winch systems for securing loads on open trailers require significant human force, are prone to unintentional disengagement, and are difficult to maintain and release, posing safety and operational challenges.
Innovation Solution
A winch design featuring a drum with a gear assembly and clutch system that allows for easy tensioning and release of straps, using a worm gear for retention and a clutch assembly that biases between fixed and rotatable configurations, enabling secure load retention with reduced manual effort and enhanced safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gear assembly with a worm gear is used to retain tension in the strap, then the friction between the worm and gear provides automatic retention, but it becomes difficult to release the strap and the worm may unintentionally disengage from the gear
Solution Approach 1:
The patent applies the dynamics principle by making the engagement between the worm gear and gear dynamic rather than static. The clutch assembly allows the system to switch between two states: engaged (for tension retention) and disengaged (for easy release). This resolves the contradiction by enabling the system to be reliable during operation but easily releasable when needed, eliminating the difficulty of releasing straps while maintaining secure retention during use.
Solution Approach 2:
The patent introduces a clutch assembly as an intermediary mechanism between the worm gear and the drum. This clutch acts as a mediator that controls the transmission of force from the worm gear to the drum. When engaged, it allows the worm gear to drive the drum for tensioning; when disengaged, it decouples the worm gear from the drum, enabling easy release. This intermediary resolves the contradiction by providing controlled connection and disconnection without requiring forceful manual intervention.
2Productivity
If the worm is made disengageable from the gear to expedite the release process, then multiple winches can be released faster, but the worm may unintentionally disengage during transport causing injury or damage
Solution Approach 1:
The clutch assembly creates a dynamic engagement system that can be intentionally activated or deactivated. Unlike a permanently disengageable worm that risks accidental disengagement, this system requires deliberate action to disengage through the clutch mechanism. This resolves the contradiction by enabling fast intentional release while preventing accidental disengagement during transport, as the clutch maintains secure engagement under normal operating conditions.
Solution Approach 2:
The clutch assembly is designed to maintain self-engagement through its mechanical design, automatically maintaining the engaged state during normal operations including transport. The system only disengages when deliberately actuated through the release mechanism. This self-service characteristic ensures that the worm remains reliably engaged during transport while still allowing expedited release when needed, resolving the contradiction between release speed and engagement stability.
3Force
If a traditional winch bar is used to generate significant force for tightening the strap, then the strap can be tightened effectively, but the winch bar requires significant human force and is prone to dislodge causing injury
Solution Approach 1:
The patent replaces the traditional mechanical winch bar system with a gear and worm gear mechanism. Instead of requiring direct manual force application through a winch bar, the system uses the gear assembly to multiply and control the force applied to the drum. This substitution resolves the contradiction by providing effective strap tightening through mechanical advantage while eliminating the safety hazards associated with high-force winch bars that can dislodge and cause injury.
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 winch system provides secure load retention with reduced manual effort, prevents unintentional disengagement, and allows for easy release and adjustment, improving safety and operational efficiency while maintaining a lubricated state.
Implementation Method 1
The friction between the worm and the gear retains tension in the strap after the turning force is applied.
Implementation Method 2
a gear assembly with a worm gear wherein the worm is turned to drive the gear and thereby the winch
Data Source
AI summary
A winch for securing a load to a vehicle a is disclosed. The winch includes a mounting bracket with opposed flanges. The winch further includes a drum extending along an axis between a first end and a second end. The drum is mounted relative to the opposed flanges so that the drum is rotatable about its axis. The winch includes a gear received on the drum and a worm configured to mesh with the gear so that a rotation of the worm causes a rotation of the gear. The winch further includes a clutch assembly between the drum and the gear. The clutch assembly is biasable between a first configuration in which the gear is fixed relative to the drum about the axis of the drum and a second configuration in which the gear is rotatable relative to the drum about the axis of the drum.