Wheelie Bar Axle Housing Mount for Leaf Spring Suspension

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Solution Overview

Problem

Existing wheelie bars for drag racing vehicles with leaf spring suspensions often attach to the leaf springs or their mounts, causing stress and potential damage under hard acceleration, and fail to meet requirements for secure, durable, inexpensive, easy maintenance, and simple use.

Innovation Solution

A wheelie bar design that securely attaches to the axle housing of a car, using pivotally mounted side members, a ground wheel, and a rear support member with an elevating facility, avoiding attachment to leaf springs or the chassis, and incorporating features like coil springs and shock absorbers for flexibility and reduced friction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the wheelie bar is attached to the leaf springs or their mounting brackets, then the wheelie bar can control vehicle rotation during acceleration, but the mounting brackets can unbend or break under hard acceleration causing severe damage

Engineering Contradiction:

Improvewheelie bar attachment reliabilityVSAvoidmounting bracket strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The invention extracts the wheelie bar attachment from the leaf spring mounting brackets and relocates it to the axle housing. This separation removes the harmful stress concentration from the vulnerable bracket areas while maintaining the wheelie bar's primary function of controlling vehicle rotation during acceleration.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention introduces an intermediary mounting structure that attaches to the axle housing rather than the leaf spring brackets. This intermediary attachment point serves as a stronger, more reliable anchor that can withstand the substantial stresses of hard acceleration without causing damage to the vehicle's suspension system.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the wheelie bar is securely attached to withstand hard acceleration, then vehicle control is improved, but the attachment points on the chassis or body may be damaged

Engineering Contradiction:

Improvewheelie bar attachment securityVSAvoiddamage to vehicle chassis or body

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention extracts the attachment points from the chassis and body structures and relocates them exclusively to the axle housing. This removal of attachment from vulnerable areas eliminates the harmful effects on the vehicle's chassis and body while maintaining secure attachment for wheelie control.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The axle housing serves as an intermediary structure that can absorb and distribute the stresses of wheelie bar operation without transmitting damaging forces to the chassis or body. This intermediary attachment location protects the vehicle's primary structural components from damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the wheelie bar uses rigid attachment to prevent vehicle lifting, then control effectiveness is improved, but the suspension components experience increased stress

Engineering Contradiction:

Improvewheelie bar control effectivenessVSAvoidsuspension stress

Core Design Contradiction:

ReliabilityVSStress or pressure

Solution Approach 1:

The invention extracts the wheelie bar attachment from the suspension system (leaf springs and brackets) and relocates it to the axle housing. This extraction eliminates the transmission of stress to the suspension components while maintaining the wheelie bar's ability to effectively control vehicle lifting during acceleration.

Inventive Principle:

Principle #2Taking out (Extraction)

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, easy-to-maintain, and cost-effective wheelie bar that effectively prevents vehicle tilting without stressing the leaf spring suspension, ensuring driver safety and vehicle integrity during hard acceleration.

Implementation Method 1

incorporating features like coil springs and shock absorbers for flexibility

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

incorporating features like coil springs and shock absorbers for flexibility and reduced friction

Methodology Applied

Scientific EffectViscous damping: Viscous Damping

Data Source

PatentUS8590909B2Wheelie bar for leaf spring equipped cars

Publication Date: 2013.11.26 CALVERT JOHN

AI summary

A wheelie bar for leaf spring equipped cars includes first and second mounting brackets each having at least one attachment point and one bearing feature. First and second lower side members are pivotally mounted to the mounting brackets. A ground wheel is rotatably mounted to ends of the lower side members. First and second upper side members are pivotally mounted to the mounting brackets and fixedly attached to the lower side members. A vehicle bearing wheel is rotatably mounted to opposite ends of the first and second upper side members. Bearings are provided. A rear support member connects the upper side members and distal ends of the lower side members. At least one elevating facility urges the first and second lower side members upwardly toward an underside of a car. The attachment points have arcuate front ends and are fixedly attached to an axle housing of the car by welding.