Portable Tyre Changing Stand with Ratchet Mechanism
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Solution Overview
Problem
Existing motorcycle tyre changing stands are ergonomically uncomfortable due to their low position, unstable during use, and often require rigid fixation to the ground, limiting portability and versatility.
Innovation Solution
A compact, portable, and lightweight motorcycle tyre changing stand with a frame angled between 30-90 degrees, featuring a rear support leg, horizontal front leg, removable center shaft, ratchet mechanism, and adjustable lever system for improved ergonomics and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional low-position tyre changing stand is used, then the device structure is simple, but the ergonomics deteriorates making the operator work in an uncomfortable position
Solution Approach 1:
The stand is elevated from ground level to a height suitable for ergonomic operation, changing the vertical dimension of the device. This allows the operator to work at a comfortable height while maintaining structural simplicity through the use of an adjustable height mechanism rather than complex mechanical systems
Solution Approach 2:
The stand incorporates an adjustable height mechanism that allows dynamic adaptation to different operator heights and preferences. This dynamic adjustment capability improves ergonomics without requiring a completely complex fixed-height structure for each operator size
2Stability of the object's composition
If a portable tyre changing stand is used, then the portability is improved, but the stability deteriorates causing the frame to move during lever operation
Solution Approach 1:
The stand is divided into separable components including removable legs and an adjustable height mechanism that can be disassembled for transport. This segmentation allows the device to be lightweight and portable while maintaining stability during use through proper assembly and locking mechanisms
Solution Approach 2:
The stability characteristics of the stand are changed by adjusting the height and position of the legs, which can be extended and locked in place during operation. This parameter adjustment allows the lightweight structure to achieve adequate stability without adding significant weight
3Stability of the object's composition
If a tyre changing stand requiring ground fixation is used, then the stability is improved, but the portability deteriorates limiting mobility to fixed locations
Solution Approach 1:
The stand incorporates self-stabilizing features such as adjustable legs with ground-contacting feet that automatically adapt to the surface. This self-service stabilization mechanism eliminates the need for external ground fixation while maintaining stability, thereby preserving portability and mobility to various locations
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
The solution allows for comfortable, upright tyre changing with enhanced stability, facilitating easier handling and use without the need for rigid fixation, thus improving ergonomics and portability.
Implementation Method 1
ratchet mechanism with the tyre mounting head attached thereto
Data Source
Figure 1
Figure 2
AI summary
The portable tyre changing stand includes a frame 1, a rear support leg 2 and a horizontal front leg 3 that attaches to the lower end of the frame 1 and is removable. A removable center shaft 4 perpendicular to the frame 1 is attached to the central part of the frame 1, where the ratchet mechanism 12 with the tyre mounting head 13 is attached. For accurate centering of the rim, there is a stepped bushing 16 on the center shaft 4. Plastic support surfaces 5 are attached to the frame 1 above and below the center shaft 4. A socket 7 is attached to the ratchet mechanism 12, and the lever 8 attached to it gives the mounting head 13 movement around the center shaft 4.