Multifunction Ladder Structure with Adjustable Foot Rods
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Solution Overview
Problem
Existing car ladders lack stability on rough or inclined surfaces, are inconvenient to store and transport, and do not accommodate tires with different tread sizes, leading to safety concerns and reduced usage.
Innovation Solution
A multifunction ladder structure comprising a first ladder frame, a second ladder frame, and combining assemblies with adjustable bands and foot rods that can be securely positioned between a tire and wheel fender, standing firmly on various surfaces, and easily folded for storage, with adjustable foot rods for different tire sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed ladder structure is used, then the structure is simple and easy to manufacture, but it cannot adapt to different tire sizes and models
Solution Approach 1:
The ladder structure incorporates adjustable components including extendable side rails and repositionable rungs that allow the ladder to dynamically adapt its dimensions and configuration to fit different tire sizes and vehicle models, transforming a static structure into a flexible one
Solution Approach 2:
The ladder employs adjustable parameters such as variable rail length, adjustable rung positions, and modifiable angle configurations that can be changed according to different application requirements, enabling the same ladder to serve multiple tire sizes and vehicle types
2Ease of manufacture
If a rigid ladder structure is used, then the manufacturing cost is low, but it cannot stand firmly on rough or inclined surfaces
Solution Approach 1:
The ladder base incorporates adjustable feet or leveling mechanisms that can dynamically adapt to uneven and inclined surfaces, allowing the rigid ladder structure to achieve stable positioning on various ground conditions through mechanical adjustment rather than complex flexible construction
3Device complexity
If a traditional ladder structure is used, then the structure is simple, but it is inconvenient to store or transport
Solution Approach 1:
The ladder is divided into separable components including side rails, rungs, and base sections that can be easily detached and reassembled, allowing the simple ladder structure to be conveniently disassembled for storage and transport while maintaining structural integrity when assembled
4Device complexity
If a single-function ladder is used, then the device complexity is low, but it cannot serve multiple purposes such as tire ladder and A-shaped ladder
Solution Approach 1:
The ladder structure incorporates universal design features including adjustable configurations and repositionable components that enable the same basic structure to perform multiple functions such as tire ladder mode and A-shaped ladder mode, eliminating the need for separate specialized ladders
Data Source
AI summary
The present invention discloses a multifunction ladder structure, it includes a first ladder frame; a second ladder frame; and two combining assemblies that combine the second ladder frame with the first ladder frame, altogether with an optional adjustable band and plural optional foot rods each slides or fixes individually in the first or the second ladder frame. With the implementation of the present invention, the multifunction ladder structure has the special benefit of being easy to install or operate; being able to insert and set firmly in between a tire and the wheel fender as a tire ladder; being able to stand firmly beside a car or places as an A-shaped ladder; with further adding of an adjustable band on the first ladder frame to encircle the tire for even better stability when being used as a tire ladder, or to encircle the second ladder frame for safer storing or transporting; adopting plural foot rods each slides or remains still individually in the first or the second ladder frame, the multifunction ladder structure further applies better on tires of different size, and stands firmly on rough or inclined ground, roads or object surfaces; and with the top rod of the first ladder frame or the further installing of a second stepping unit, the stepping height of the A-shaped ladder can be further raised for even more convenient applications.