Frame Assembly Connecting Element for Two-Wheeled Vehicle
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Solution Overview
Problem
The design of two-wheeled vehicles with full suspension systems faces a conflict between the space requirements of the drive unit and the position of the main pivot point, leading to a compromise in both space efficiency and kinematic optimization.
Innovation Solution
A frame assembly that integrates a connecting element acting as both a pivot point and a mounting point for the drive unit, allowing for a simplified, space-saving, and cost-effective design by eliminating the need for additional mounting and joint elements, thereby optimizing kinematics and ride dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate mounting elements and joint elements are used for the drive unit and rear triangle connection, then the structural integrity and reliability are improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent combines the mounting function and joint function into a single integrated connecting element. This element simultaneously serves as the mounting point for the drive unit and the pivot joint for the rear triangle, eliminating the need for separate mounting elements and joint elements. The integration maintains structural integrity while reducing the total number of components required in the system.
Solution Approach 2:
The connecting element is designed with multi-functionality, serving both as a mounting interface for the drive unit and as a pivot joint for the rear triangle suspension. This universal element performs multiple functions that would traditionally require separate components, including providing structural support, enabling rotation, and serving as a mounting interface, thereby reducing device complexity while maintaining reliability.
2Reliability
If additional mounting elements are added to the main frame for the drive unit, then the drive unit mounting reliability is improved, but the main frame rigidity deteriorates due to additional drill holes
Solution Approach 1:
The mounting function is merged into the joint element itself, which is already integrated into the main frame structure. This eliminates the need for additional separate mounting elements that would require drill holes in the main frame. The joint element provides both the rotational pivot function and the drive unit mounting function, maintaining frame rigidity while ensuring reliable drive unit attachment.
3Adaptability or versatility
If the connecting element is positioned to optimize force transmission and kinematics, then the ride characteristics are improved, but the space available for cable routing is reduced
Solution Approach 1:
The connecting element is designed with a modular structure that separates the pivot function and mounting function into different spatial dimensions. The pivot axis is positioned for optimal kinematic performance, while the mounting interface extends in a different dimension to provide adequate clearance for cable routing. This dimensional separation allows both kinematic optimization and sufficient space for drive unit cables to be achieved simultaneously.
4Adaptability or versatility
If shorter chainstays are used on the rear triangle, then the ride characteristics and geometry adjustability are improved, but the structural stability may deteriorate
Solution Approach 1:
The connecting element is designed with built-in structural reinforcement features that pre-compensate for the reduced stability that would result from shorter chainstays. The element includes integrated support structures and optimized geometry that provide additional structural stability, allowing the rear triangle to use shorter chainstays for better geometry adjustability without sacrificing overall structural stability.
Data Source
AI summary
A frame assembly of a two-wheeled vehicle, operable with muscle power and/or motor power. The frame assembly includes a main frame, a sprung rear triangle, and at least one connecting element, which is arranged on the main frame. The connecting element connecting at least a part of the rear triangle to the main frame so as to be pivotable about a joint axis, and the connecting element being equipped for mounting a drive unit on the main frame.