Lower Cross Member Loading Surface for Stable Tilting Vehicles
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Solution Overview
Problem
Existing three-wheeled tilting vehicles have limited load capacity, especially when compared to two-wheeled motorcycles and tricycles, and existing solutions to increase load capacity compromise vehicle stability or require additional load modules.
Innovation Solution
A saddle riding motor vehicle with a roll four-bar linkage that supports front wheels and a lower cross member extending between them, allowing a load to be positioned close to the ground, minimizing pivoting movements and maximizing lateral stability during rolling movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a top case or containers are placed on the rear part to increase load capacity, then the load capacity increases, but the vehicle stability and maneuverability are compromised
Solution Approach 1:
The patent moves the load support from the rear vertical dimension to the front horizontal dimension by extending the lower cross member forward between the front wheels. This creates a loading surface in the front area, effectively utilizing space in another dimension to increase load capacity without affecting rear vehicle stability.
Solution Approach 2:
The patent segments the load support function by separating the rear frame structure from the front wheel support structure. The lower cross member is extended independently to form a loading surface, allowing load capacity to be increased without modifying the rear vehicle configuration that ensures stability.
2Quantity of substance
If the lower cross member is extended to support load, then the load capacity increases, but the vehicle complexity increases
Solution Approach 1:
The lower cross member is designed to serve multiple functions: it maintains the four-bar linkage mechanism for wheel support, provides structural connection between front wheels, and extends to form a loading surface for cargo support. This multi-functionality increases load capacity without adding separate structural components.
Solution Approach 2:
The patent merges the load support function with the existing four-bar linkage structure by extending the lower cross member. Instead of adding a separate rear load support structure, the solution integrates load capacity enhancement into the front wheel support mechanism, reducing overall vehicle complexity.
3Quantity of substance
If additional load modules are added to increase load capacity, then the load capacity increases, but the ease of manufacture decreases
Solution Approach 1:
The patent combines the loading surface with the existing lower cross member structure, eliminating the need for separate rear load modules. This integration simplifies manufacturing by using a single extended component rather than multiple separate parts that would need to be assembled.
Solution Approach 2:
The extended lower cross member serves as both the four-bar linkage component and the load support structure. This multi-functionality reduces the number of parts that need to be manufactured and assembled, thereby increasing ease of manufacture while maintaining load capacity.
Data Source
AI summary
The motor vehicle comprises two front steering and rolling wheels (4, 4′) and at least one rear rolling wheel (9). The motor vehicle comprises a roll four bar linkage (10) connected to a frame (2A-2B) and which supports the front steered wheels (4, 4′). A suspension group (71, 71′) is interposed between the front wheels (4, 4′) and the roll four bar linkage (10) to allow movement of the front wheels with respect to the roll four bar linkage (10). The roll four bar linkage (10) comprises: a lower cross member (11) and an upper cross member (12) hinged to the frame to pivot around first roll axes (101, 101′); and a right upright (21) and a left upright (21′) hinged to the cross members (11, 12) so as to rotate around second roll axes (212, 212′, 221, 221′) parallel to the first roll axes (101, 101′). The lower cross member (11) extends along a longitudinal direction between the front wheels and beyond said front wheels to form a loading surface.