Tire Changer Tool Layout to Prevent Rim and Tire Interference
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Solution Overview
Problem
Existing tire fitting/removing devices often cause discomfort and risk of accidental damage to the rim and tire due to overlapping or interfering tool work areas, and are complex and costly.
Innovation Solution
A device with a fitting/removal tool that moves between a work configuration, overlapping the bead breaking tool, and a home configuration, away from it, reducing interference and damage by allowing separate operation phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a tire is tightly fitted to the rim to prevent detachment during high-speed rotation, then the tire-rim connection strength is improved, but it becomes increasingly difficult to fit or remove the tire from the rim
Solution Approach 1:
A conical fitting tool is introduced as an intermediary between the tire and rim. The tool's conical surface engages with the conical section of the rim flange, providing a mechanical advantage that enables the tire to be fitted or removed despite the tight fit between tire and rim. The intermediary tool temporarily replaces direct hand manipulation, allowing control during the critical fitting/removal process.
Solution Approach 2:
The system transitions from a static tight fit to a dynamic fitting process. During fitting/removal, the tire is temporarily disengaged from the rim's driving force, allowing it to be manipulated with the conical tool. Once fitted, the tire returns to its tight static connection state for high-speed operation. This dynamic transition resolves the contradiction between strong connection and ease of operation.
2Stability of the object's composition
If the tire is tightly secured to the rim for high-speed rotation stability, then the tire remains firmly attached during operation, but the tire cannot be easily detached for maintenance or replacement
Solution Approach 1:
The conical fitting tool serves as a mediator that enables detachment without compromising operational stability. During high-speed rotation, the tire remains firmly attached to the rim. For maintenance, the conical tool is introduced to provide the necessary mechanical advantage for controlled detachment, resolving the contradiction between stability during operation and ease of detachment.
Solution Approach 2:
The rim flange is segmented into a conical section that interfaces with the fitting tool, separating the functions of operational stability and ease of detachment. The conical section works with the fitting tool during installation/removal, while the rest of the rim structure maintains the tight fit during operation, allowing both requirements to coexist.
3Productivity
If conventional fitting methods are used without specialized tools, then the device complexity is reduced, but the fitting process becomes time-consuming and labor-intensive
Solution Approach 1:
The rim flange incorporates a dynamic conical section that enables quick engagement and disengagement with the fitting tool. This dynamic interface allows the tire to be rapidly fitted or removed without complex machinery, improving productivity while keeping the device relatively simple compared to conventional heavy-duty fitting equipment.
Solution Approach 2:
The conical geometry introduces a dimensional advantage by converting radial force into axial force during fitting/removal. This geometric transformation provides mechanical advantage in a compact form, improving fitting speed without requiring complex multi-component devices or excessive force application.
Data Source
Figure 1
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AI summary
The device (1) for fitting/removing tires comprises: - one supporting arm (2) associable with a tire changing machine (100); - one fitting/removal tool (3) associated with the supporting arm (2) and adapted to interact with the tire (P) of a wheel (R) to fit/remove the tire (P) onto/from the rim (C); - one bead breaking tool (4) associated with the supporting arm (2) and adapted to interact with the tire (P) to separate at least one of the relevant beads (T) from the rim (C); wherein the fitting/removal tool (3) is movable with respect to the supporting arm (2) between one configuration of work, wherein it is side-by-side with the bead breaking tool (4), and one home configuration, wherein it is moved away from the bead breaking tool (4), and wherein the fitting/removal tool (3) performs a rotational movement around an axis of movement (M) and one shifting movement along the axis of movement (M).