Wall-Mounted Tire Changer Using Pseudo Axle for Motorcycle Wheels

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Solution Overview

Problem

Existing manual motorcycle tire changers are cumbersome, require significant space, and often damage tires and wheels due to their design, lacking effective wheel holding mechanisms and balancing capabilities.

Innovation Solution

A wall-mounted tubeless tire changing system utilizing a spindle as a pseudo axle to suspend the wheel vertically, combined with a mount/demount bar that allows for easy tire mounting and demounting without the need for a pedestal or additional balancing tools, using the wheel's bearings for balance and minimizing workspace requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a tire changing pedestal is used to firmly hold the wheel in place, then the wheel holding stability is improved, but the device weight and space requirements increase significantly

Engineering Contradiction:

Improvewheel holding stabilityVSAvoiddevice weight

Core Design Contradiction:

Stability of the object's compositionVSWeight of stationary object

Solution Approach 1:

The invention extracts the essential function of wheel holding from the heavy pedestal structure and implements it through a simpler axle insertion mechanism. The axle is inserted through the wheel hub and secured with a cotter pin, eliminating the need for a bulky pedestal while maintaining wheel stability during tire changing operations.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The wheel hub itself serves as the mounting structure for the axle, utilizing the existing wheel components rather than requiring an external heavy pedestal. The axle and cotter pin system uses the wheel's own structure to achieve stable positioning, making the system self-sufficient and eliminating unnecessary weight.

Inventive Principle:

Principle #25Self-service

2Stability of the object's composition

If a tire changing pedestal is used to firmly hold the wheel, then the wheel holding stability is improved, but the floor space required for operation increases to over 25 square feet

Engineering Contradiction:

Improvewheel holding stabilityVSAvoidfloor space

Core Design Contradiction:

Stability of the object's compositionVSArea of stationary object

Solution Approach 1:

The invention removes the large pedestal structure and extracts only the essential wheel holding function, implementing it through a compact axle insertion system that requires minimal space while maintaining operational stability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using a large horizontal pedestal footprint, the invention transitions to a vertical axle insertion through the wheel hub, utilizing the vertical dimension and the wheel's own structure to achieve stable positioning with minimal floor space occupation.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Device complexity

If simple levers (spoons) are used to mount tires on wheel rims, then the device complexity is reduced, but the tire mounting difficulty and time consumption increase significantly

Engineering Contradiction:

Improvedevice complexityVSAvoidtire mounting ease

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The invention introduces a mount/demount bar as an intermediary tool that works in conjunction with the axle system. This bar provides mechanical advantage and proper positioning for the tire bead, making the mounting process easier and more efficient while keeping the overall device simple.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system allows the wheel to rotate on the axle, enabling dynamic positioning and leverage application during tire mounting. This rotational capability provides mechanical advantage that simplifies the tire changing process compared to static lever systems.

Inventive Principle:

Principle #15Dynamics

4Productivity

If existing tire changing tools are used, then the basic tire changing function is achieved, but the tire and wheel damage risk increases due to lack of proper holding mechanisms

Engineering Contradiction:

Improvetire changing efficiencyVSAvoidtire and wheel damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The invention extracts the essential wheel holding function from complex pedestal systems and implements it through a simple axle-and-cotter-pin mechanism that securely positions the wheel without applying damaging forces to the tire or wheel components.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The wheel hub serves as the natural mounting point for the axle, creating a secure fit that prevents wheel movement and tire damage during the tire changing process. The cotter pin provides positive locking without requiring additional heavy clamping mechanisms that could damage the wheel.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8245755B2Tubeless tire changing system using a pseudo axle

Publication Date: 2012.08.21 TORNGA CHARLES EDWARD

AI summary

An assembly for mounting and demounting tires from wheels with a hollow cylinder hub such as motorcycle wheels composed of a wall mounting base on a frame with a spindle that projects perpendicular to the wall and a removable mount/demount bar. A wheel hub is mounted on the spindle. The mount/demount bar is fixed in place at the end of the spindle so as to resist rotational force in a vertical plane. With demount bar tool head positioned for levering the tire off the rim or forcing it onto the rim the wheel is turned on the spindle. The tool may be wall mounted for space-efficient operation and allows the wheel to be balanced on the spindle by allowing the wheel to spin freely on its own bearings.