Nerf Bar Foot Pegs with Replaceable Serrated Inserts
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Solution Overview
Problem
Existing foot rest solutions for off-road vehicles lack a combination of structural strength, configurability, and extended protection area, failing to effectively maintain foot position and safety over uneven terrain.
Innovation Solution
A nerf bar structure combining tubular and sheet metal components with configurable foot peg inserts and fabric webbing for enhanced protection and user customization, providing a universal mounting system that accommodates various vehicle frames and allows for improved foot retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a foot rest is made from a single sheet of metal with a flat surface, then manufacturing is simple, but the foot cannot be effectively maintained in position on uneven terrain
Solution Approach 1:
The foot rest is divided into multiple components: a base structure and separate replaceable inserts with different surface configurations. This allows the simple base to be combined with specialized inserts (serrated, textured, smooth) for different terrain conditions, maintaining manufacturing simplicity while improving foot position stability through appropriate insert selection.
Solution Approach 2:
The foot rest system allows dynamic adaptation by enabling users to replace inserts based on terrain conditions. The interchangeable nature of the inserts provides dynamic adjustment capability, allowing the foot rest to adapt to varying terrain requirements while maintaining a simple overall structure.
2Strength
If foot pegs are fixed to the frame structure, then structural strength is improved, but configurability and user customization are reduced
Solution Approach 1:
The foot peg assembly is segmented into a fixed mounting structure (providing strength) and replaceable insert components (providing configurability). The inserts can be removed and replaced with different configurations or materials, allowing users to customize for specific applications while the fixed mounting maintains structural integrity.
Solution Approach 2:
The mounting structure is designed with universal mounting features that can accommodate multiple types of inserts. This multi-functionality allows a single strong mounting system to support various configurational needs through interchangeable components, combining structural strength with adaptability.
3Area of stationary object
If the foot protection area is extended with fabric webbing, then protection area is increased, but structural complexity increases
Solution Approach 1:
The fabric webbing is merged with the metal frame structure to create an integrated foot protection system. The webbing extends the protection area by filling gaps and providing additional surface area, while being attached to the simple metal frame, thus increasing protection without significantly complicating the overall structure.
Solution Approach 2:
Fabric webbing, as a flexible thin material, is used to extend the foot protection area. The flexibility of the fabric allows it to conform to the frame structure and provide additional protection surfaces without adding rigid structural complexity, maintaining ease of assembly and disassembly.
4Reliability
If serrated inserts are used to grip the shoe bottom, then foot position stability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The serrated inserts are designed as replaceable, potentially disposable components that can be manufactured with simpler precision requirements. Since they are interchangeable, any variations in manufacturing precision can be compensated by replacing the insert rather than requiring high precision across the entire foot rest assembly.
Solution Approach 2:
The serrated pattern parameters (tooth size, spacing, depth) can be varied to optimize grip for different shoe types and terrain conditions. This parameter flexibility allows for effective foot positioning even with moderate manufacturing precision, as the functional performance is more sensitive to parameter selection than to exact dimensional tolerances.
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 robust structural support, customizable foot pegs, and extended protection area, ensuring user safety and comfort by maintaining foot position and allowing air movement, while accommodating minor physical variations in vehicle frames.
Implementation Method 1
The structure includes serrated inserts that grip the bottom of a shoe to maintain the foot in position
Data Source
AI summary
A foot rest and foot holding apparatus is disclosed that protects a users foot from ground obstructions. The foot holding apparatus has multiple friction points to reduce movement of a foot in the apparatus. The structure includes serrated inserts that grip the bottom of a shoe to maintain the foot in position. The inserts are replaceable or changeable to accommodate foot placement preference. The foot peg inserts have a serrated top structure for gripping the underside of a shoe and have an inner and an outer component that can be used individually or in combination. The nerf structure is a combination fabric and welded metal brush guard where the foot pegs are mounted.