Bead Breaker Arm With Linearly Movable Joint For Variable Rim Sizes
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Solution Overview
Problem
Existing bead breaker devices are not optimally suited for removing tires from very big/wide or small/narrow rims, as their performance is dependent on the width of the wheel and lacks flexibility to accommodate different sizes and shapes.
Innovation Solution
A bead breaker device with a rotatable hub and a pivotably fixed bead breaker arm, featuring a first joint that is linearly movable, allowing for adjustment in distance and angle, enabling better flexibility in accommodating various wheel sizes and shapes, and an actuation mechanism for moving the arm between closed and open positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed bead breaker arm is used, then the device structure is simple, but the device cannot accommodate different wheel sizes and shapes
Solution Approach 1:
The bead breaker arm is made dynamically adjustable through a pivot joint that allows the arm to rotate relative to the support structure. This enables the arm to adapt its position and angle to accommodate different wheel sizes and shapes while maintaining structural simplicity. The dynamic adjustment is achieved through gravitational force and friction control rather than complex mechanical linkages.
Solution Approach 2:
The support structure serves multiple functions: it provides structural support, acts as a rotational axis for the bead breaker arm, and enables the arm to assume different positions for various wheel configurations. This multi-functionality reduces the need for additional components while enhancing adaptability across different wheel types.
2Adaptability or versatility
If the bead breaker arm is made adjustable for different wheel sizes, then the versatility improves, but the device complexity increases
Solution Approach 1:
The pivot joint creates a dynamic system where the bead breaker arm can freely adjust its position based on the wheel dimensions. The arm rotates around a fixed axis on the support structure, allowing continuous adjustment without discrete steps or complex locking mechanisms. This dynamic approach simplifies the overall mechanism while achieving full adjustability.
Solution Approach 2:
The system changes the positional parameters of the bead breaker arm through simple rotation rather than through complex mechanical transformations. The arm's angle and distance from the wheel center can be continuously adjusted by rotating the arm around the pivot axis, providing versatile adjustment with minimal mechanical complexity.
3Adaptability or versatility
If a linearly movable joint is added to the bead breaker arm, then the flexibility for different wheel types increases, but the device complexity increases
Solution Approach 1:
The carriage provides linear movement along the support structure, adding a second degree of freedom to the system. This allows the pivot joint itself to be positioned at different locations, further enhancing flexibility for different wheel types. The linear movement is achieved through simple guide rails and friction control rather than complex actuation mechanisms.
Solution Approach 2:
The system transitions from a single rotational degree of freedom to two degrees of freedom by adding linear movement along the support structure. This dimensional addition allows the bead breaker arm to reach different positions and angles more effectively, accommodating a wider variety of wheel configurations without proportionally increasing complexity.
4Reliability
If the bead breaker arm is designed for optimal performance on standard wheels, then the performance is good for standard sizes, but the performance deteriorates for very big/wide or small/narrow rims
Solution Approach 1:
The dynamically adjustable bead breaker arm can optimize its position and angle for each specific wheel size, ensuring consistent performance across different rim dimensions. The arm rotates to achieve the optimal breaking angle and position regardless of whether the wheel is very big/wide or small/narrow, maintaining reliability across the full range of applicable sizes.
Solution Approach 2:
The support structure with its pivot joint serves as a universal mounting system that adapts to various wheel sizes. The same basic structure performs optimally for standard wheels while also being capable of adjusting to accommodate very big/wide or small/narrow rims, achieving both consistency and versatility.
Data Source
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AI summary
A bead breaker device (2) for removing a tyre (8) from a rim (6) of a wheel (4) comprises a support structure (10) and a bead breaker arm (12) which is pivotably fixed to the support structure (10) by a joint (20). Said joint (20) is linearly movable with respect to the support structure (10).