Track-Mounted Wheel Chock with Automatic Locking Mechanism
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Solution Overview
Problem
Existing wheel restraint systems for loading docks face challenges such as slippage on slippery surfaces, misplacement, complex and costly automatic mechanisms, and the need for operators to verify placement, which affects safety and efficiency.
Innovation Solution
A manually operated wheel restraint system with a track-mounted wheel chock that can be easily positioned and locked into place using a lever and locking feature, allowing for direct force transmission to the driveway to prevent movement while minimizing frictional drag and avoiding complex installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a manual wheel chock is used, then the device complexity is reduced and ease of operation is improved, but the reliability may worsen due to potential slippage on slippery surfaces
Solution Approach 1:
The wheel restraint system is divided into two functional components: a stationary base plate anchored to the driveway and a movable wheel chock. This segmentation allows the base plate to provide stable anchoring while the chock remains manually operable, resolving the contradiction between simplicity and reliability.
Solution Approach 2:
The base plate is pre-installed and anchored to the driveway surface before operation. This preliminary action ensures that when the wheel chock is deployed, it has a pre-prepared stable foundation to engage with, preventing slippage on slippery surfaces while maintaining manual operability.
2Ease of operation
If the wheel chock is manually movable between retracted and operative positions, then the ease of operation is improved, but the force required to move it may increase due to frictional drag
Solution Approach 1:
The frictional drag issue is addressed by extracting the movement constraint from the chock itself and relocating it to the base plate interface. The chock moves freely on its support surface, while the base plate provides the anchoring point, separating the movement function from the anchoring function to reduce unnecessary friction.
3Reliability
If a locking feature is added to secure the wheel chock, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The wheel chock system is designed to be self-securing through the interaction between the chock geometry and the base plate anchoring points. When the chock is positioned against the wheel, the system naturally engages the restraining function without requiring additional active locking mechanisms, maintaining simplicity while ensuring stability.
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 system provides effective and efficient wheel restraint without the need for complex mechanisms, reduces operational costs, and ensures safety by allowing easy manual operation and placement verification, while maintaining durability and preventing slippage.
Implementation Method 1
allowing for direct force transmission to the driveway to prevent movement
Implementation Method 2
minimizing frictional drag
Data Source
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AI summary
An example wheel restraint includes a wheel chock that is manually movable between a retracted or release position clear of a wheel of a vehicle at a loading dock and an operative position to block the path of the wheel. In the release position, the chock can be manually moved freely along a track that is mounted to a driveway of the dock. When the chock is manually moved from its release position to its operative position, a locking feature automatically restricts the movement of the chock relative to the track. When the chock is manually moved back to its release position, the locking feature automatically disengages. Although the wheel chock is connected to a track, much of the force exerted by the wheel against the chock can be transmitted directly from the chock to the driveway.