Preloaded Tyre Mounting Tool for Rim Protection
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Solution Overview
Problem
Existing tyre mounting and demounting tools are complex, requiring multiple parts and separate drives, and do not allow for both mounting and demounting operations efficiently, necessitating precise control to avoid rim damage.
Innovation Solution
A mounting/demounting tool unit with a pivotally mounted tool carrier arm and a hook-shaped tool body, featuring a tensioning element to maintain the tool in a resting/operating position, allowing for reversible positioning and secure grip of the tyre bead without complex control efforts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hook-shaped demounting tool is used to engage the tyre bead, then the tool can grip and move the tyre bead out of the rim, but the tool must be positioned very close to the rim edge which requires precise control to avoid uncontrolled pivoting and rim damage
Solution Approach 1:
The tool is pre-loaded by the pre-load element into an initial position where it contacts the rim edge before the actual demounting operation begins. This preliminary positioning action ensures the tool is correctly placed without requiring high precision during the main operation, as the pre-load element has already established the correct starting position.
Solution Approach 2:
The pre-load element acts as an intermediary mechanism between the tool carrier arm and the hook-shaped demounting tool. It mediates the positioning process by providing a mechanical means to pre-position the tool against the rim edge, reducing the control burden on the main actuation system.
2Ease of operation
If known demounting tools are designed with multiple parts and separate drives, then they can perform demounting operations, but the device complexity increases and control efforts increase
Solution Approach 1:
The invention combines the tool carrier arm, the hook-shaped demounting tool, and the pre-load element into a single integrated tool unit. This merging of components reduces the overall number of parts and eliminates the need for separate drives, while maintaining the full demounting operation capability.
Solution Approach 2:
The tool unit is designed to perform multiple functions: the tool carrier arm provides structural support and positioning, the pre-load element provides initial positioning and force application, and the hook-shaped tool performs the actual bead engagement and removal. This multi-functional design eliminates the need for separate specialized components.
3Force
If the tool is positioned close to the rim edge for effective tyre bead engagement, then gripping force is improved, but the risk of rim damage increases due to uncontrolled pivoting moments
Solution Approach 1:
The pre-load element applies a preliminary positioning force that establishes the correct initial contact between the tool and rim edge. This pre-positioning action ensures the tool is correctly aligned before the main gripping force is applied, preventing uncontrolled pivoting that could damage the rim while maintaining effective bead engagement.
Solution Approach 2:
The mechanical interaction between the pre-load element and the tool creates a feedback mechanism that automatically adjusts the tool position. When the tool contacts the rim edge, the pre-load element provides resistance that prevents over-rotation or uncontrolled pivoting, giving immediate feedback to the operator or control system about the correct positioning.
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 efficient and simple mounting and demounting of tyres with reduced control efforts, preventing rim damage and allowing for both mounting and demounting operations with a single tool unit.
Implementation Method 1
means for reversibly urging the mounting/demounting tool in a resting/operating position and for positioning the mounting/demounting tool in said resting/operating position are provided, including at least one tensioning element
Data Source
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AI summary
The present invention relates to a mounting/demounting tool unit (U) for mounting a tyre (T) to or demounting a tyre (T) from a rim of a vehicle wheel (W) and for being adapted to be attached to a tyre mounting/demounting machine (M), including: a longitudinally extending tool carrier arm (10) having a center line (TM) and a first as well as a second end (10a, 10b), a mounting/demounting tool (40) having a first as well as a second end (42a, 42b) and a hook (56) arranged in the region of the second end (42b), and being pivotally mounted to the tool carrier arm (10) in the region of its first end (42a), wherein means (70) for reversibly urging the mounting/demounting tool (40) in a resting/operating position and for positioning the mounting/demounting tool (40) in said resting/operating position are provided.