Hinged Boarding Ladder with Flexible Straps for Impact Protection
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Solution Overview
Problem
Existing boarding ladders for heavy equipment are prone to damage in harsh environments, balancing between durability and safety, as they are either rigid and strong but prone to damage or flexible but difficult to climb, lacking a compromise between damage resistance and sure-footed safety.
Innovation Solution
A mobile equipment boarding ladder with hinged mounting brackets and flexible straps that fold against the equipment in response to external forces, featuring self-centering mechanisms and parallel pivot mechanisms to ensure stability and ease of use, combining the benefits of flexibility and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid metal ladder is used, then strength and structural integrity are improved, but susceptibility to damage from external forces worsens
Solution Approach 1:
The ladder is designed with hinged mounting brackets that allow it to dynamically adjust its position. When subjected to external forces like rocks or debris, the ladder can pivot and fold away from the vehicle, transforming from a static rigid structure to a dynamic protective system that absorbs impacts without damage.
Solution Approach 2:
The ladder incorporates flexible mounting mechanisms with pivot points that allow controlled movement. This flexibility enables the ladder to bend and fold when struck by external objects, preventing the rigid structure from breaking while maintaining its load-bearing capability during normal use.
2Object-affected harmful factors
If a flexible rope ladder is used, then resistance to damage from external forces is improved, but climbing safety and ease of use worsen
Solution Approach 1:
The ladder is segmented into multiple rigid rungs connected by flexible mounting brackets with pivot points. This segmentation allows each component to move independently when subjected to external forces, providing damage resistance, while the rigid rungs maintain their structural integrity to ensure safe foot placement and climbing stability.
Solution Approach 2:
The ladder combines rigid metal rungs for structural strength and safety with flexible hinged mounting brackets for damage resistance. This composite structure integrates the advantages of both rigid and flexible materials, creating a system that is both safe to climb and resistant to external damage.
3Length of moving object
If the ladder is positioned close to the cab, then ingress path length is reduced, but exposure to hazardous conditions worsens
Solution Approach 1:
The ladder's dynamic hinged design allows it to be positioned close to the cab for short ingress paths while providing the capability to fold away when hazards are present. The flexibility enables the ladder to adapt its position, maintaining both operational efficiency and safety.
4Object-affected harmful factors
If a hydraulic swing-up mechanism is used, then protection from damage is improved, but device complexity worsens
Solution Approach 1:
The ladder uses simple hinged brackets with pivot points instead of complex hydraulic mechanisms. The dynamic flexibility is achieved through passive mechanical joints that allow the ladder to fold away from impacts without requiring active control systems, hydraulic fluid, or complex actuation mechanisms.
Solution Approach 2:
The ladder's hinged design allows it to automatically respond to external forces and fold away without requiring external control. The passive mechanical joints enable the ladder to protect itself from damage through its own structural design, eliminating the need for hydraulic systems or electronic controls.
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 provides a durable and safe boarding solution that minimizes damage from external forces while maintaining easy access, offering a balance between the longevity of flexible ladders and the safety of rigid ladders by folding against the equipment when encountering obstacles.
Implementation Method 1
The hinged brackets are self-centering via gravity, a spring, or both.
Implementation Method 2
The hinged brackets are self-centering via gravity, a spring, or both.
Data Source
AI summary
An mobile equipment boarding ladder includes a pair of hinged mounting brackets attached to the mobile equipment at a first end. A ladder step is attached to the second ends of the hinged brackets via a pair of pivot mechanisms. The hinge pins and the pivot mechanisms are substantially parallel so that the entire ladder can fold and collapse against the side of the mobile equipment in response to an external force, such as an obstacle. The hinged brackets can be self-centering via gravity, a spring, or both. A pair of flexible straps are attached to the second end of the hinged brackets, and hang vertically from the brackets. A pair of lower pivot mechanisms and a lower step are attached to the lower end of the straps, oriented in the same manner as the first pivot mechanisms.