Bead Breaker Roller Head Automatic Positioning

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Solution Overview

Problem

Existing tire mounting-demounting machines require active operator intervention for bead breaking, which can lead to rim or tire damage and are costly due to the need for sensors and control units.

Innovation Solution

A work head with a bead breaker roller that includes a lever element with a feeler pin arm, allowing automatic positioning and operation without sensors or control units, using a pivoted bracket and elastic return means to maintain the bead breaker roller in a predetermined angle and position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If automatic positioning with feeler pin and control unit is used, then positioning precision is improved, but device complexity and production cost increase

Engineering Contradiction:
Improvepositioning precisionVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the electronic control unit and sensor-based automatic positioning system with a purely mechanical solution. The lever element with feeler pin arm uses mechanical leverage and geometry to automatically position the bead breaker roller against the tire bead, eliminating the need for electronic sensors and control units while achieving precise positioning.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses a simple, inexpensive mechanical lever element with feeler pin arm instead of expensive electronic control systems. This mechanical component is easier to manufacture, requires less maintenance, and can be replaced more easily if needed, reducing overall system cost and complexity.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Manufacturing precision

If electronic control unit and feeler pin are used, then bead breaking accuracy is improved, but production cost increases

Engineering Contradiction:
Improvebead breaking accuracyVSAvoidproduction cost
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent substitutes expensive electronic control units and sensors with a simple mechanical lever system. The lever element with feeler pin arm provides accurate bead breaking positioning through mechanical means alone, significantly reducing production costs while maintaining or improving accuracy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The mechanical lever element with feeler pin arm is self-actuating and self-positioning. It automatically finds and maintains the correct position against the tire bead through mechanical feedback, eliminating the need for expensive electronic control systems while achieving accurate bead breaking.

Inventive Principle:
Principle #25Self-service

3Device complexity

If operator intervention is required for roller positioning, then device complexity is reduced, but productivity and safety decrease

Engineering Contradiction:
Improvedevice complexityVSAvoidproductivity
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The lever element with feeler pin arm automatically positions and maintains the bead breaker roller against the tire bead without operator intervention. The mechanical system self-regulates through the geometry of the lever and feeler pin, improving productivity and safety while keeping the device relatively simple.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The feeler pin arm provides mechanical feedback to the lever element, automatically indicating when the bead breaker roller is correctly positioned against the tire bead. This feedback mechanism enables automatic positioning and operation, improving productivity without requiring complex electronic systems.

Inventive Principle:
Principle #23Feedback

4Measurement precision

If operator verification is required before bead breaking, then positioning accuracy can be verified, but time consumption increases

Engineering Contradiction:
Improvepositioning accuracyVSAvoidtime consumption
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The mechanical lever element with feeler pin arm automatically verifies and maintains correct positioning of the bead breaker roller against the tire bead. The system self-corrects and self-verifies through its mechanical geometry, eliminating the need for operator verification and reducing time consumption.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The feeler pin arm provides continuous mechanical feedback to ensure the bead breaker roller remains correctly positioned throughout the bead breaking operation. This automatic feedback mechanism eliminates the need for manual verification steps, saving time while maintaining positioning accuracy.

Inventive Principle:
Principle #23Feedback

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

Enables automatic bead breaking with reduced operator intervention and lower production costs, minimizing the risk of rim or tire damage by leveraging the geometry of the bead and rim edge for controlled penetration.

Implementation Method 1

a lever element, which is pivoted to the head-holder support and bears a feeler pin arm portion designed to control, in use, the lever element, whereby it is angularly moved between a work position, in which it is thrust against the bead breaker tool

Methodology Applied
Scientific EffectLever: Lever

Implementation Method 2

a lever element, which is pivoted to the head-holder support and bears a feeler pin arm portion designed to control, in use, the lever element

Methodology Applied
Scientific EffectMechanical Advantage: Mechanical Advantage

Implementation Method 3

return means designed to yieldably keep the lever in its work position

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS7798196B2Bead breaker roller head for a tire mounting-demounting machine
Publication Date: 2010.09.21 VEHICLE SERVICE GRP ITALY SRL
  • US7798196B2 patent drawing
  • US7798196B2 patent drawing
  • US7798196B2 patent drawing

AI summary

A tire mounting-demounting machine having a bead breaking arm with a work head having a head-holder support (10), bracket member (6) pivoted at one end thereof to the head-holder support (10), a bead breaker tool (2) supported at the other end of the at least one bracket member (6) and configured to engage a bead of a tire (P), a lever element (7) pivoted to the head-holder support (10) and bearing a feeler pin arm portion (9) configured to control the lever element (7) and a biasing member configured to yieldably keep the lever element (7) in the work position.