Straddled Vehicle Bracket Adjusting Tandem Footrest Position
Solution Overview
Problem
Conventional straddled vehicles face challenges in adjusting the position of tandem footrests to accommodate riders of varying body sizes without increasing the size and weight of the supporting brackets, which compromises rigidity and comfort.
Innovation Solution
The design incorporates a bracket system with interchangeable bolt positions on the seat frame and bracket, allowing for easy adjustment of the tandem footrest's position without extending the bracket rearward, thus maintaining rigidity and minimizing weight and size increments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the bracket is extended rearward to provide multiple attachment portions for the tandem footrest, then the position adjustability of the tandem footrest is improved, but the size and weight of the bracket increase
Solution Approach 1:
The bracket is divided into a fixed portion attached to the seat frame and a movable portion that can be repositioned. The movable portion includes multiple attachment positions that can be selectively engaged with the seat frame, allowing the tandem footrest position to be adjusted without extending the overall bracket length. This segmentation enables position variability while maintaining a compact bracket structure.
2Adaptability or versatility
If the bracket is extended rearward to provide multiple attachment portions for the tandem footrest, then the position adjustability of the tandem footrest is improved, but the size of the bracket increases
Solution Approach 1:
Instead of extending the bracket in the longitudinal direction (rearward), the invention utilizes the vertical dimension by providing multiple attachment positions at different heights on the seat frame. The movable portion of the bracket can engage with these positions vertically, allowing tandem footrest position adjustment without increasing the bracket's length in the vehicle's longitudinal direction.
3Strength
If the thickness of the bracket is increased to increase rigidity, then the structural strength is improved, but the weight of the bracket increases
Solution Approach 1:
The bracket is segmented into fixed and movable portions, with the fixed portion providing structural rigidity and the movable portion providing adjustability. This segmentation allows the fixed portion to be optimized for strength without excessive thickness, while the movable portion adds minimal weight but enables position variability through selective engagement with multiple attachment positions.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The straddled vehicle includes a seat frame 12 placed outward of a head pipe in the vehicle width direction, and a bracket 40 detachably attached to the seat frame 12. A first hole 61 and a second hole 62 are formed in the bracket 40, and a third hole 63, a fourth hole 64 and a fifth hole 65 are formed in the seat frame 12. The straddled vehicle includes a first bolt inserted through the first hole 61 and the third hole 63, and a second bolt inserted through the second hole 62 and the fourth hole 64. Or, the straddled vehicle includes the first bolt inserted through the first hole 61 and the fourth hole 64, and the second bolt inserted through the second hole 62 and the fifth hole 65.