Pivoting Step Device with Automatic Locking for Road Finishers
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Solution Overview
Problem
The operator's stand for a road finisher with a step device faces challenges in transportability and work safety, as existing pivoting mechanisms compromise stability and may lead to accidental pivoting during operation.
Innovation Solution
A pivoting step device with a locking mechanism that automatically secures the step surface in the use position, preventing accidental pivoting and enhancing safety, while allowing for efficient transport by orienting the step surface vertically when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stepping surface is made pivotable between horizontal use position and vertical transport position, then transportability is improved, but work safety deteriorates due to instability and risk of accidental pivoting
Solution Approach 1:
The locking system automatically engages when the stepping surface is in the horizontal use position without requiring manual intervention. The spring element continuously applies force to push the locking element into the locked position, making the system self-regulating and eliminating reliance on operator action for safety assurance.
Solution Approach 2:
The locking element is pre-positioned by the spring force to oppose any unintended pivoting motion before it can occur. This preliminary counter-force prevents accidental pivoting during operation by maintaining constant pressure against the stepping surface in the locked state.
2Ease of operation
If the stepping surface is made pivotable for transport, then ease of operation during transport is improved, but stability during operation deteriorates
Solution Approach 1:
The stepping surface transitions from a static fixed structure to a dynamic pivotable structure that can adapt between two stable states: horizontal for operation and vertical for transport. This dynamic capability allows the system to optimize its configuration based on operational requirements.
Solution Approach 2:
The spring-loaded locking mechanism automatically maintains the stepping surface in the horizontal position during operation without requiring continuous manual attention. The system self-regulates to ensure stability whenever the stepping surface is positioned horizontally.
3Device complexity
If no locking device is provided for the pivoting step device, then device complexity is reduced, but work safety deteriorates due to risk of accidental pivoting
Solution Approach 1:
The locking system operates automatically through spring force without requiring manual locking or monitoring. The spring element continuously pushes the locking element into engagement with the stepping surface, creating a passive safety mechanism that functions autonomously.
Solution Approach 2:
The locking element acts as an intermediary component between the stepping surface and the support structure, providing a mechanical connection that prevents unintended pivoting while maintaining system simplicity. This single intermediary element effectively bridges the safety requirement without adding complex control systems.
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 solution improves transportability and work safety by ensuring the step surface remains stable during operation and automatically secures in the use position, eliminating the need for manual locking and reducing the risk of accidents.
Implementation Method 1
A locking device with a spring element is provided on the support part. The locking device has an engagement element which is preloaded by the spring element to move towards engagement with the tread part.
Data Source
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AI summary
An operator's platform (D) for a road paver (F) with a step device for providing a standing position for a person comprises a support part (20) that is fixedly connectable to a chassis (C) or a screed (B) of the road paver (F), a step part (10) with a step surface (12) pivotally attached to the support part (20) about a main pivot axis (H) between a transport position and a working position, wherein the step surface (12) is substantially horizontally oriented in the working position so that the standing position for the person is provided, and a locking device (30) with an engagement element (32) configured to engage with the step part (10) to secure its position when the step part (10) is in the working position, wherein the engagement element (32) of the locking device (30) is preloaded to move towards engaging with the step part (10).