Split Rim Tire Mounting for Rotation Axis Alignment

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

There is a risk of misalignment between the center axis of the pair of split rim members and the rotation axis of the tire mounted on them, leading to precision issues in tire measurement, processing, and testing.

Innovation Solution

A tire mounting method that includes a clamping, approaching, and rotating step to align the rotation axis of the tire with the center axis of the split rim members using a tire holding device with telescopic parts and air injection, ensuring precise alignment through controlled expansion and rotation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a tire is mounted on a pair of split rim members, then the tire can be held for measurement, processing, and testing, but misalignment between the center axis of the split rim members and the rotation axis of the tire may occur due to the weight of the tire

Engineering Contradiction:
Improvealignment precisionVSAvoidtire weight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The patent applies preliminary action by performing the rotating step during the mounting process to proactively align the tire's rotation axis with the center axis of the split rim members before measurement, processing, or testing begins. This prevents misalignment from occurring in the first place, rather than correcting it afterward.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent employs dynamics by making the split rim members rotatable during the mounting process. This dynamic adjustment allows the tire to be rotated into proper alignment with the center axis, compensating for the gravitational effect of tire weight that would otherwise cause static misalignment.

Inventive Principle:
Principle #15Dynamics

2Manufacturing precision

If the tire is held between the split rim members without alignment control, then the mounting process is simple, but precision in tire measurement, processing, and testing is compromised

Engineering Contradiction:
Improvetire measurement precisionVSAvoidmounting device complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The rotating step is performed as a preliminary action during mounting to establish proper alignment before the tire undergoes measurement, processing, or testing. This ensures precision is achieved proactively without requiring complex alignment mechanisms during subsequent operations.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The tire itself serves to generate the alignment through its own weight and geometry during the rotating step. As the split rim members rotate, the tire naturally settles into the correct position with its rotation axis aligned with the center axis, eliminating the need for external alignment devices or complex control systems.

Inventive Principle:
Principle #25Self-service

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 method effectively controls misalignment, improving the accuracy of tire measurement, processing, and testing by maintaining precise alignment of the tire on the split rim members, enhancing work efficiency and reducing man-hours.

Implementation Method 1

a tire mounting method that includes a clamping, approaching, and rotating step to align the rotation axis of the tire with the center axis of the split rim members using a tire holding device with telescopic parts and air injection, ensuring precise alignment through controlled expansion and rotation

Methodology Applied
Scientific EffectAir injection: Pressurisation

Data Source

PatentEP4501667B1Tire mounting method and tire processing method
Publication Date: 2026.04.01 BRIDGESTONE CORP
  • EP4501667B1 patent drawingFigure 1
  • EP4501667B1 patent drawingFigure 2
  • EP4501667B1 patent drawingFigure 3

AI summary

Provided is a tire mounting method for mounting tires on a tire holding device 1, wherein the tire holding device comprises a pair of split rim members 4 facing each other, a center axis A of each of the pair of split rim members is on a common predetermined axis O, the tire mounting method includes: a clamping step clamping a tire by the pair of split rim members, and a rotating step, after the clamping step, mounting each bead portion of the tire to the pair of split rim members while rotating the pair of split rim members around the predetermined axis.