Hand Winch One-Way Bearing for Controlled Reverse Release
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Solution Overview
Problem
Existing hand winches face safety hazards due to rapid release of heavy objects when reverse rotation speed is not controlled, and the locking mechanism has a high probability of breaking.
Innovation Solution
A hand winch design incorporating a one-way bearing assembly on the first rotating shaft that allows free rotation forward for winding and resistance in reverse to control speed, with adjustable resistance via an adjusting nut and disc spring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the resistance of the bracket base to the reel is reduced to save arm power during forward rotation, then the ease of operation is improved, but the safety is worsened because the heavy object may fall off rapidly during reverse rotation
Solution Approach 1:
The patent applies the dynamics principle by implementing different resistance characteristics for forward and reverse rotation through the one-way bearing assembly. During forward rotation, the one-way bearing allows free rotation with minimal resistance, saving user energy. During reverse rotation, the one-way bearing engages to provide controlled resistance, preventing the heavy object from falling off rapidly. This dynamic differentiation of resistance based on rotation direction resolves the contradiction between ease of operation and safety.
2Reliability
If the locking mechanism is used to lock the driven gear, then the reliability is improved, but the device complexity increases and the probability of breaking increases
Solution Approach 1:
The patent applies the extraction principle by removing the locking mechanism entirely and replacing it with a one-way bearing assembly. The one-way bearing inherently provides the necessary locking function during reverse rotation without requiring additional locking components. This simplifies the overall device structure, reduces the number of parts, and eliminates the complexity and breaking probability associated with separate locking mechanisms while maintaining reliability.
3Reliability
If the locking mechanism is used to lock the driven gear, then the reliability is improved, but the strength is worsened due to greater probability of breaking
Solution Approach 1:
The patent applies the extraction principle by removing the locking mechanism entirely and replacing it with a one-way bearing assembly. The one-way bearing inherently provides the necessary locking function during reverse rotation without requiring additional locking components. This simplifies the overall device structure, reduces the number of parts, and eliminates the complexity and breaking probability associated with separate locking mechanisms while maintaining reliability.
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
Prevents rapid cable release during reverse rotation, reducing safety hazards and minimizing wear on components.
Implementation Method 1
the one-way bearing assembly is sleeved on the first rotating shaft, the one-way bearing assembly is located in the protective shell... When the first rotating shaft rotates forward, the one-way bearing assembly does not rotate with the first rotating shaft, and when the first rotating shaft rotates reversely, the one-way bearing assembly rotates with the first rotating shaft
Implementation Method 2
the disc spring is arranged in the protective shell, the adjusting nut is arranged on the protective shell, and both ends of the disc spring directly or indirectly abut against the adjusting nut and the one-way bearing assembly respectively
Implementation Method 3
the adjusting nut and the disc spring cause rotation resistance to the one-way bearing assembly, which can prevent a reverse rotation speed of the first rotating shaft from being too fast
Data Source
AI summary
A hand winch is provided in the disclosure, which includes a first bracket, a second bracket, a first rotating shaft, a second rotating shaft, a handle, a one-way bearing assembly, a protective shell, a disc spring and an adjusting nut. The first rotating shaft and the second rotating shaft are respectively rotatably arranged on the first bracket and the second bracket, and the first rotating shaft is matched with the second rotating shaft, and the second rotating shaft has a reel. The handle is directly or indirectly matched with the first rotating shaft, the protective shell is arranged on the first bracket, the one-way bearing assembly is sleeved on the first rotating shaft, the one-way bearing assembly and the disc spring are located in the protective shell. The winch has benefits that the cable is prevented from being released too fast by the reel and potential safety hazard is reduced.