Motorcycle Side Stand Structure with Offset Rotational Positioning
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Solution Overview
Problem
Conventional side stand structures in motorcycles protrude downward and outward, increasing the risk of unintended grounding during cornering or when encountering uneven road surfaces, necessitating a more compact design to prevent interference with the ground.
Innovation Solution
The side stand structure is designed with a rotational positioning portion and a connector portion positioned in front of and behind the rotation shaft respectively, allowing for a more compact arrangement and preventing interference, while the connector portion is angled to facilitate easier wiring attachment and reduce the risk of grounding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the side stand is positioned to extend downward and outward for stable support, then the side stand can reliably support the vehicle body, but the stand bracket protrudes downward from the lower part of the vehicle body increasing the risk of unintended grounding during cornering or when encountering uneven road surfaces
Solution Approach 1:
The patent repositions the stand bracket and side stand assembly upward in the vertical dimension, moving them from the lower part of the vehicle body to a higher position. This dimensional change reduces the protrusion downward while maintaining the side stand's ability to extend outward for support, thereby reducing the risk of grounding during cornering or on uneven surfaces.
Solution Approach 2:
The patent employs asymmetric positioning where the stand bracket is offset from the vehicle body's lower edge, and the side stand rotates about a shaft positioned asymmetrically relative to the vehicle's longitudinal axis. This asymmetric arrangement optimizes the clearance between the side stand and the ground during vehicle tilting, preventing unintended grounding while maintaining support functionality.
2Volume of moving object
If the stand switch and connector portion are positioned close to the rotation shaft for compactness, then the side stand structure becomes more compact, but the wiring attachment and detachment becomes more difficult and the risk of grounding increases
Solution Approach 1:
The patent segments the side stand structure into distinct functional zones: the stand switch is positioned in a first region closer to the rotation shaft for compactness, while the connector portion is positioned in a second region at a greater distance from the rotation shaft. This segmentation allows each component to be optimally positioned for its specific function, maintaining overall compactness while ensuring easy wiring attachment.
Solution Approach 2:
The patent utilizes the vertical dimension to resolve the conflict between compactness and ease of operation. The stand switch is positioned higher and closer to the rotation shaft, while the connector portion is positioned lower and farther away, creating a vertical separation that facilitates wiring attachment without significantly increasing the horizontal footprint of the structure.
Data Source
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AI summary
A side stand structure including a side stand (20) rotatably supported by a vehicle body (11), and a stand switch (40) configured to detect a rotational position of the side stand (20), in which the side stand structure includes a rotational positioning portion (45) configured to position the stand switch (40) in a rotation direction of the side stand (20), and a connector portion (46) configured to connect wiring (H) to the stand switch (40), a first straight line (T1) connecting an axial center (p1) of a rotation shaft (35) of the side stand (20) to a positioning center (p2) of the rotational positioning portion (45) in a side view of a vehicle extends from the rotation shaft (35) side to the rotational positioning portion (45) side toward one of forward and rearward directions in a longitudinal direction of the vehicle, and a second straight line (T2) in a wiring attachment and detachment direction of the connector portion (46) in the side view of the vehicle extends from the rotation shaft (35) side to the connector portion (46) side toward the other of the forward and rearward directions in the longitudinal direction of the vehicle.