Motorcycle Body Frame Solid Pivot Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing motorcycle vehicle body frame structure faces challenges in achieving high rigidity around the pivot shaft due to its placement adjacent to a hollow portion, which complicates providing high rigidity to the periphery of the pivot shaft.
Innovation Solution
A vehicle body frame structure with a diamond frame configuration, featuring a front frame that extends rearward and downward with enlarged width, and a body frame that supports the swing arm with solid structures and continuous hollow structures, where pivot support parts are integrated into the solid structures to enhance rigidity, and a footrest is attached to the solid structure for improved riding comfort and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the pivot shaft is provided adjacent to the hollow portion of the rear-arm bracket, then the weight of the body frame is reduced, but the rigidity of the periphery of the pivot shaft cannot be sufficiently provided
Solution Approach 1:
The invention applies local quality by creating a hybrid structure where solid portions are strategically placed at the pivot shaft support location within the body frame, while other areas maintain hollow construction. This allows the pivot shaft periphery to have high rigidity (solid structure) while the overall frame remains lightweight (hollow structure in non-critical areas).
Solution Approach 2:
The body frame is segmented into different structural zones: hollow portions for weight reduction in non-critical areas, and solid portions for structural reinforcement at the pivot shaft support location. This segmentation allows simultaneous optimization of weight and local rigidity requirements.
2Strength
If solid structures are provided in the body frame to ensure high rigidity, then the structural integrity is improved, but the weight of the body frame increases
Solution Approach 1:
Instead of making the entire body frame solid, the invention applies solid structure only locally where required for structural integrity (at the pivot shaft support location), while maintaining hollow construction in other areas. This localized approach provides necessary strength without excessive weight gain.
Solution Approach 2:
The body frame is divided into solid and hollow segments based on functional requirements. The solid segment is positioned at the pivot shaft support for structural integrity, while hollow segments are used elsewhere to minimize weight, achieving an optimal balance between strength and weight.
3Weight of moving object
If the body frame is made as a hollow structure to reduce weight, then the weight is reduced, but it becomes difficult to provide high rigidity to the periphery of the pivot shaft
Solution Approach 1:
The invention creates different structural qualities in different locations: hollow construction for weight reduction in general areas, and solid construction for rigidity at the pivot shaft support location. This local differentiation resolves the contradiction between overall weight reduction and local rigidity requirements.
Solution Approach 2:
The body frame is segmented into hollow portions (for weight reduction) and solid portions (for rigidity at pivot shaft support). This segmentation allows the frame to be lightweight overall while maintaining high rigidity where structurally necessary.
Data Source
AI summary
There are provided: a front frame extending rearward and downward from a head pipe while enlarging a width thereof; and a body frame joined to rear ends of the front frame and supporting a swing arm. The body frame is formed in a manner that right and left body parts joined to the rear ends of the front frame, and bridge parts for upper portions and lower ends of the right and left body parts are integrally molded. Solid structures are provided in the middle of the right and left body parts, a continuous hollow structure formed of the upper portions of the right and left body parts and the upper bridge part and a continuous hollow structure formed of lower portions of the right and left body parts and the lower bridge part are provided at an upper position and a lower position, respectively, with the solid structures sandwiched therebetween. Further, pivot parts being pivot support parts for the swing arm are provided to the solid structures of the body parts.