Motorized Bead-Breaking Tool for Tyre Changing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Heavy-duty tyre-changing machines face difficulties in effectively detaching the tyre bead from the rim due to inadequate inclination adjustment and purely axial pressure, which is not flexible enough to handle tyres of different shapes and sizes.
Innovation Solution
The tyre-changing machine incorporates motorized means to vary the inclination of the bead-breaking tool independently, allowing for both axial thrust and rotational levering actions, enabling precise adjustment and continuous variation of the bead-breaking tool's position based on the wheel type, without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual blocking means are used to set the inclination of the bead-breaking disc, then the device structure remains simple, but the adaptability to different wheel types and the effectiveness of bead detachment are reduced
Solution Approach 1:
The patent applies the dynamics principle by making the bead-breaking disc inclination adjustable during operation rather than fixed. The disc can be tilted at different angles relative to the wheel axis depending on the wheel type being serviced, transforming a static structure into a dynamic one that adapts to different working conditions. This resolves the contradiction by enabling versatility without requiring multiple fixed-position devices.
Solution Approach 2:
The patent implements parameter changes by allowing the inclination angle of the bead-breaking disc to be varied continuously or discretely according to the specific wheel type. This parameter adjustment capability enables the same device to effectively handle different wheel sizes and types, improving adaptability while maintaining a single device structure rather than requiring multiple specialized tools.
2Reliability
If purely axial pressure is applied by the bead-breaking disc, then the device structure remains simple, but the effectiveness of bead detachment is reduced when the bead is glued to the rim edge
Solution Approach 1:
The patent applies dynamics by enabling the bead-breaking disc to perform both axial movement and rotational movement during operation. The disc can rotate about its own axis while being pressed against the tyre bead, creating a combined axial-rotational action that improves detachment effectiveness. This dynamic movement pattern allows the disc to break through glued beads more effectively than pure axial pressure alone.
Solution Approach 2:
The patent implements dimensionality change by adding a rotational degree of freedom to the traditionally axial bead-breaking action. Instead of moving only in one dimension (axially toward the wheel), the disc now moves in two dimensions: axial compression and rotational sweeping. This multi-dimensional action pattern significantly improves the reliability of bead detachment from glued rims.
3Measurement precision
If the bead-breaking disc is fixed in discrete positions, then the device structure remains simple, but the precision of inclination adjustment is reduced
Solution Approach 1:
The patent applies dynamics by transitioning from a static, fixed-position disc to a dynamically adjustable disc that can be positioned continuously or at multiple discrete angles during operation. This dynamic positioning capability allows precise inclination adjustment matched to different wheel types and bead conditions, improving measurement precision without significantly complicating the overall device structure.
4Extent of automation
If motorized means are added to vary the inclination of the bead-breaking tool, then the precision and adaptability are improved, but the device complexity increases
Solution Approach 1:
The patent applies mechanics substitution by replacing manual mechanical adjustment with motorized actuation. Electric or hydraulic motors are used to automatically tilt and position the bead-breaking disc, eliminating the need for manual cranks, levers, or hand-wheels. This substitution significantly improves automation extent and operational precision while the added complexity is concentrated in the actuation system rather than the overall mechanical structure.
Solution Approach 2:
The patent implements universality by designing a multi-functional bead-breaking tool that combines axial pressing, rotational breaking, and automated inclination adjustment in a single integrated system. The motorized means enable the tool to adapt to different wheel types and bead conditions automatically, making the device universally applicable across various applications rather than requiring separate specialized tools for different scenarios.
Data Source
AI summary
A tire-changing machine comprising support means (4) for a wheel, a tool-bearing arm (50) at an end of which a bead-breaking tool (6) is hinged according to a hinge axis (E) which is perpendicular to an axis (A) of the wheel, and first motorised means (32, 33) for causing a relative movement, in a parallel direction to the axis (A) of the wheel, between the support means (4) and the tool-bearing arm (50), such as to press the bead-breaking tool (6) against a flank of a tire on the wheel, characterized in that it comprises second motorised means (64), activatable independently from the first motorised means (32, 33), which second motorised means (64) are destined to rotate the bead-breaking tool (6) about the hinge axis (E) with the tool-bearing arm (50), in order to vary an inclination of the bead-breaking tool (6) with respect to the axis (A) of the wheel which is mounted on the support means (4).