Motorcycle Stand Leverage Device for Tool-Free Width Adjustment
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Solution Overview
Problem
Existing motorcycle stands with width adjustment mechanisms, such as those using square tubes and hex head machine screws, often suffer from a loose fit that fails to securely hold the motorcycle, and require tools for adjustment, which can be inconvenient.
Innovation Solution
A leverage device that allows the hex head machine screw to be loosened and re-tightened using hand force only, featuring a low-profile design with a protruding lever for hand actuation and a flat bottom with a through-hole to retain the screw head, enabling tool-free width adjustment without interfering with the stand's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hex head machine screw is used to secure the top support, then the motorcycle is held securely, but a wrench is required for adjustment which reduces convenience
Solution Approach 1:
A lever device acts as an intermediary tool that interfaces with the hex head screw. The lever fits into the hexagonal socket of the screw head, allowing the user to apply rotational force to loosen or tighten the screw without needing a separate wrench. This intermediary device bridges the gap between the screw mechanism and hand operation.
Solution Approach 2:
The lever device is permanently attached to the top support structure, making the adjustment mechanism self-contained. The lever itself becomes part of the assembly, allowing the user to directly manipulate the screw through the lever without requiring external tools. The system serves itself by incorporating the adjustment tool into the structure.
2Ease of operation
If a square tube with threaded member is used for width adjustment, then tool-free adjustment is possible with integrated knob, but a loose fit exists between tubes which reduces security
Solution Approach 1:
The design extracts the adjustment function from a separate mechanism and integrates it directly into the top support structure. The lever is permanently attached to the top support, and the screw is directly engaged with the upright structural member, eliminating the need for nested square tubes and reducing the number of interfacing components that could create loose fits.
Solution Approach 2:
Instead of having the top support move within a tube and be secured by a screw from the side, the design inverts the approach by having the screw engage the upright member directly from the top, with the lever providing the adjustment mechanism. This reversal of the adjustment mechanism's location and method eliminates the loose fit problem between nested tubes.
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 leverage device provides secure and tool-free width adjustment of a motorcycle stand, ensuring the motorcycle is held firmly without the need for tools, while allowing additional torque application if needed, and can be retrofitted to existing stands without altering them.
Implementation Method 1
A leverage device that allows the hex head machine screw to be loosened and re-tightened using hand force only
Implementation Method 2
The leverage device provides secure and tool-free width adjustment
Data Source
AI summary
The leverage device is intended to be installed on motorcycle stands that currently use a hex head machine screw for width adjustment. It consists of a) a female hex portion to mate with the hex head of the machine screw, b) a lever portion to be actuated by the user and c) a flat bottom to keep it captive to the machine screw. The device allows the user to loosen the screw slightly for width adjustment then re-tighten it without the use of tools. The low profile device is installed on the motorcycle stand to become a permanent part of the stand, unlike a wrench that is separate.