Road Surfacing Roller Handle Guard Against Reverse Crushing
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Solution Overview
Problem
Self-propelled rolling machines used for depositing bulk road surface materials can roll back onto users, posing a safety risk due to their weight and size, potentially causing injury.
Innovation Solution
Incorporation of a transmission mechanism with a control handle that allows for forward, reverse, and stop positions, along with an anti-crushing guard integrated with the control handle, which rotates to prevent the machine from moving backward when the user exerts force, ensuring the machine stops or moves forward safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rolling machine is equipped with a heavy motor and transmission system to enable self-propulsion, then the machine can move autonomously, but the weight increases the risk of injury to the user if the machine rolls back
Solution Approach 1:
The anti-crushing guard is positioned to protrude backward when the control handle is in the reverse position, creating a preliminary protective barrier that prevents the user from being crushed if the machine rolls back. This preventive structure is activated in advance by the control handle position itself, without requiring additional sensors or active systems.
Solution Approach 2:
The anti-crushing guard acts as an intermediary protective element between the user and the heavy rolling machine. When the machine rolls back, the guard contacts the user's clothing or body first, transferring the force away from critical body parts and preventing direct crushing injury from the machine's weight.
2Ease of operation
If the control handle is positioned for reverse operation, then the machine can move backward for positioning, but the user cannot see obstacles behind them and may be struck or crushed
Solution Approach 1:
The anti-crushing guard protrudes backward when the control handle is in the reverse position, creating a preliminary protective barrier that prevents the user from being crushed by obstacles or the machine itself during backward movement, without requiring the user to see behind them.
3Object-affected harmful factors
If the anti-crushing guard is positioned further back than the control handle in the reverse position, then it provides better protection, but it may interfere with the user's ability to operate the control handle
Solution Approach 1:
The anti-crushing guard is integrated with the control handle and moves dynamically with it. When the control handle is in the forward or neutral position, the guard retracts or positions itself to not interfere with operation. When the control handle is turned to the reverse position, the guard automatically protrudes backward to provide protection, combining operational ease with safety.
Data Source
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AI summary
The invention relates to a self-propelled rolling machine (1) for depositing bulk road surfacing materials on the ground, characterized in that the machine includes a user anti-crushing guard (11), which is rotationally fixed to the control handle (9), located further back than the handle (9) and the handle (7) in the second reverse control position (P2) of the handle (9), and configured to cause the rotation of the handle (9) from the second reverse control position (P2) to the first forward control position or to the third stop control position, when a forward force (F) is exerted against the anti-crushing guard (11) in the second position (P2).