Saddle Vehicle Seat Frame Inclination Width Reduction
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Solution Overview
Problem
Saddle type vehicles face challenges in reducing the vehicle body width around the seat, which affects boarding ease and striding comfort due to the projection of the seat frame's periphery to the outer sides.
Innovation Solution
The vehicle design incorporates a main frame with a first inclination portion positioned inwardly in the widthwise direction and a seat frame with second inclination portions that narrow the widthwise projection, featuring a seat frame structure with a first seat frame inclined downwardly and a second seat frame inclined upwardly, both extending along the outer profile of the seat, supported by a seat supporting member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the seat frame is connected at a front end portion to a portion of the main frame which is widened to the outer sides in the widthwise direction, then the seat frame can be securely supported, but the periphery of the seat projects to the outer sides in the widthwise direction, worsening the boarding ease
Solution Approach 1:
The patent applies dimensionality change by introducing inclination portions that slope inwardly in the widthwise direction toward the rear of the vehicle. The first inclination portion of the main frame and the second inclination portion of the seat frame create a tapered configuration that reduces widthwise projection while maintaining structural support through the inclined geometry.
Solution Approach 2:
Instead of having the seat frame connect directly to a widened portion of the main frame (which causes outward projection), the patent inverts the approach by using inclination portions that slope inwardly. This reverses the typical outward-flaring configuration and achieves width reduction while preserving support functionality.
2Ease of operation
If the vehicle body width around the seat is reduced to improve boarding, then the striding comfort is improved, but the structural support for the seat frame becomes more challenging
Solution Approach 1:
The patent uses inclination portions that create a three-dimensional tapered form, allowing the seat frame to narrow in the widthwise direction while maintaining adequate support through the inclined structural geometry. This dimensional approach enables width reduction without compromising support strength.
Solution Approach 2:
The patent employs a composite frame structure combining the main frame with inclination portions and the seat frame with inclination portions. This composite configuration distributes structural loads across multiple components, enabling width reduction while maintaining overall support capability through the integrated frame system.
Data Source
AI summary
A saddle type vehicle having a seat frame connected to the rear of a main frame wherein the vehicle body width of a periphery of the seat is suppressed to improve the boarding. The saddle type vehicle includes a head pipe, a main frame extending obliquely downwardly from the head pipe, and a seat frame for supporting a seat. The main frame has a third extension inclined so as to be positioned on the inner side in a widthwise direction toward the rear of the vehicle. The seat frame is connected at a front end portion thereof to the third extension. The seat frame has a first inclination portion inclined so as to be positioned on the inner side in the widthwise direction toward the rear of the vehicle from the front end portion.