Tyre Mounting Tool Hook Guide for Rim Protection

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Solution Overview

Problem

Existing tyre mounting and demounting tools are complex, require multiple parts and separate drives, and lack the ability to perform both mounting and demounting efficiently, necessitating precise control to avoid damage and increasing operational effort.

Innovation Solution

A simplified mounting/demounting tool unit with a tool body, extension, and hook design that includes a plastic-coated protrusion for guiding the tyre bead, featuring a tapered and bezelled surface for easy operation, and a tension spring for positioning, allowing for reduced control effort and fewer actuators.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a hook-shaped demounting tool is used to engage the tyre bead, then the tool can effectively grip and move the tyre bead out of the rim, but the tool must be positioned very close to the rim edge to avoid uncontrolled pivoting, which increases control complexity and requires precise positioning

Engineering Contradiction:
Improvetyre bead gripping reliabilityVSAvoidcontrol complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

A guide element is introduced as an intermediary component between the tool body and the rim. This guide element engages with the rim edge at a predetermined location to define and constrain the pivoting movement of the tool, preventing uncontrolled rotation while allowing the hook to effectively grip the tyre bead without requiring extremely precise positioning

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If multiple separate drives and complex mechanisms are used for mounting and demounting tools, then precise control and positioning can be achieved, but the device complexity and number of parts increase significantly

Engineering Contradiction:
Improvetool positioning precisionVSAvoidnumber of parts
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The tool is designed to be self-positioning through the guide element that automatically engages with the rim edge at a predetermined location. The tool's own weight and the mechanical engagement with the rim provide the positioning function, eliminating the need for separate positioning drives or complex control mechanisms

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The tool carrier arm is designed to accommodate both mounting tools and demounting tools with a single universal interface. The guide element and tool body configuration allow the same carrier arm structure to perform both mounting and demounting operations, reducing the need for separate specialized mechanisms

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS10252586B2Tyre mounting/demounting tool
Publication Date: 2019.04.09 SNAP ON EQUIP SRL
  • US10252586B2 patent drawing
  • US10252586B2 patent drawing
  • US10252586B2 patent drawing

AI summary

A mounting/demounting tool for mounting/demounting a tire with respect to the rim of a vehicle wheel, comprising a tool body defining a first end of the tool, an extension from the tool body defining a second end of the tool, and a hook arranged at the extension in the vicinity of the second end. The hook has an inner surface section for gripping and guiding a tire bead during tire demounting, and a first outer surface section for guiding a tire bead during tire mounting. A protrusion extends from between the first outer surface section and a second outer surface section of the hook to the second end.