Vehicle Pullout Step With Spring Latch Mechanism
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Solution Overview
Problem
Existing vehicle step arrangements are often costly, complex, unreliable, and not rugged enough to withstand heavy use, making them unsuitable for frequent access to vehicle components like storage beds and roofs.
Innovation Solution
A pull-out step system with a frame attachable to the underside of a vehicle, featuring a tread member on rails with a latching mechanism and flexible cable for easy extension and retraction, allowing convenient access without complex mechanical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex mechanical systems are incorporated into movable step arrangements, then the step functionality is achieved, but the cost increases and the system becomes less reliable
Solution Approach 1:
The patent removes complex mechanical systems from the step arrangement, retaining only the essential components: a tread member, support structure, and simple latching mechanism. This extraction of unnecessary complexity directly improves reliability while reducing cost and maintenance requirements.
Solution Approach 2:
The invention employs simple, inexpensive components that can be easily replaced if needed, rather than investing in complex, expensive mechanical systems. The latching mechanism uses basic elements like latches, cables, and springs that are cost-effective and highly reliable.
2Ease of operation
If movable step arrangements are designed to be extendable, then access to vehicle portions is facilitated, but extensive modifications to the vehicle are required
Solution Approach 1:
The step arrangement is designed as a separate, modular unit that can be installed independently on the vehicle without requiring extensive vehicle modifications. The support structure attaches to the vehicle body, while the tread member remains movable and detachable, allowing easy installation and removal.
Solution Approach 2:
The latching mechanism is designed to be manually operated by the user through simple cable-pulling or latch-engagement actions, without requiring complex control systems or vehicle integration. The spring-loaded latch automatically engages and disengages, providing self-service functionality.
3Ease of manufacture
If movable step arrangements use simple mechanisms, then the cost is reduced, but the steps are not rugged enough to withstand heavy use
Solution Approach 1:
The support structure and tread member are constructed from robust materials that provide high strength and durability. The support structure may use steel or aluminum alloys, while the tread member uses slip-resistant materials, creating a composite construction that is both rugged and cost-effective.
Solution Approach 2:
The latching mechanism incorporates spring elements that provide resilient force, and the overall design allows for controlled movement and stress distribution. The curved or angled geometry of the support structure and latch components helps distribute mechanical loads, enhancing durability without requiring overly complex reinforcement.
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 a rugged, cost-effective, and reliable means to access vehicle components, ensuring durability and ease of use by maintaining the step under the vehicle when not in use and extending it as needed, reducing repair and replacement needs.
Implementation Method 1
The latch member is spring biased into the first position
Implementation Method 2
A flexible cable is connected to the lever for selectively moving the lever against the spring tension
Data Source
AI summary
A movable pullout step attachable to a vehicle and which has a spring actuated latching mechanism that selectively allows and restrains positioning of the pullout step in either a retracted position under the vehicle or a step position wherein a tread extends away from the vehicle to allow a person to stand thereon to facilitate the access to desired portions of the vehicle.