Motorcycle Frame Supporting Pipe for Rigidity
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Solution Overview
Problem
Conventional mono backbone type motorcycle body frames require special measures such as increased thickness or boss diameter to maintain vehicle rigidity, which complicates the structure and increases costs.
Innovation Solution
A motorcycle frame design featuring a main frame with vertically extending box-shaped pipes and supporting pipes that attach side plates, allowing for smooth load transmission and enhanced rigidity without complex adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the main frame thickness or boss diameter is increased to maintain vehicle rigidity, then the vehicle rigidity is improved, but the structure becomes more complex and manufacturing costs increase
Solution Approach 1:
The invention introduces a supporting pipe that extends in the vehicle width direction, adding a lateral dimension to the load transmission path. This pipe connects the right and left side plates, creating a new structural dimension that enhances rigidity without requiring increased thickness of existing components. The supporting pipe acts as a lateral brace that distributes loads across the vehicle width, resolving the contradiction by providing rigidity through dimensional expansion rather than component thickening.
Solution Approach 2:
The supporting pipe serves as an intermediary element between the side plates and the main frame structure. Rather than directly increasing the thickness of load-bearing components, the supporting pipe mediates load transmission by providing an additional structural pathway. This intermediary component allows loads to be distributed more efficiently through the frame structure, maintaining rigidity while avoiding the need to thicken existing parts.
2Strength
If the main frame thickness or boss diameter is increased to maintain vehicle rigidity, then the vehicle rigidity is improved, but manufacturing costs increase
Solution Approach 1:
By adding the supporting pipe in the vehicle width direction, the invention creates a new structural dimension that provides rigidity without requiring expensive thickening of existing components. This dimensional approach allows the use of standard-thickness materials while achieving enhanced rigidity through the additional lateral support structure.
Solution Approach 2:
The invention segments the load transmission function by separating it into multiple components: the main frame structure and the additional supporting pipe. This segmentation allows each component to maintain standard dimensions while collectively providing enhanced rigidity. The supporting pipe handles specific lateral load transmission, allowing other components to remain simpler and more cost-effective to manufacture.
3Device complexity
If side plates are attached directly to the main frame using bosses, then the structure is simple, but load transmission is not smooth and vehicle rigidity is insufficient
Solution Approach 1:
The supporting pipe acts as an intermediary that improves load transmission between the side plates and the main frame structure. By providing this additional structural element, loads are transmitted more smoothly through the frame without requiring complex attachment mechanisms. The supporting pipe creates a more continuous load path, enhancing rigidity while maintaining structural simplicity.
Solution Approach 2:
The supporting pipe adds a lateral dimension to the load transmission system, creating a three-dimensional load distribution network. This dimensional enhancement allows loads to be transmitted more effectively through the frame structure without increasing the complexity of individual connection points, thus improving rigidity while preserving structural simplicity.
Data Source
Figure 1
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Figure 3
AI summary
A vehicle (1) includes a main frame (24) that has a vertically extending portion (25) arranged in a vehicle width center. A pair of side plates are disposed on opposing sides of the up-and-down extension part 25. A supporting pipe (26) is fixed to the vertically extending portion (25) and each plate is secured to a respective end of the supporting pipe (26).