Multi-Wheeled Vehicle Frame Layout for Lower Bending Loads

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Solution Overview

Problem

Existing multi-wheeled vehicle frames face challenges in efficiently distributing structural loads, leading to excessive bending forces and requiring larger cross-sectional dimensions, which can increase weight and complicate assembly and disassembly.

Innovation Solution

A frame configuration utilizing a combination of top, down, and brace members that rely on compressive and tensile strengths, with pivotally connected joints at specific work points, minimizing bending forces and allowing thinner, lighter components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional frame configurations are used, then structural load distribution is achieved, but excessive bending forces occur requiring larger cross-sectional dimensions

Engineering Contradiction:

Improvestructural load distributionVSAvoidframe weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The patent applies dynamics by introducing pivotally connected joints at specific work points that allow the frame members to dynamically adjust their orientation in response to applied loads. This dynamic adaptation enables the frame to optimize its structural efficiency under varying load conditions, reducing excessive bending forces while maintaining strength with lighter cross-sectional dimensions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the structural parameters by reconfiguring the frame geometry and member orientations to specific angles and positions. By optimizing the geometric parameters of the frame configuration, the design achieves improved load distribution that minimizes bending moments, allowing for reduced material cross-sections while maintaining structural integrity

Inventive Principle:

Principle #35Parameter changes

2Strength

If larger cross-sectional dimensions are used to reduce bending forces, then frame strength is improved, but assembly and disassembly become more complex

Engineering Contradiction:

Improveframe strengthVSAvoidassembly complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent segments the frame into distinct members connected by pivotally connected joints at specific work points. This segmentation allows each member to be independently optimized and easily assembled or disassembled by simply pivoting the connections, rather than requiring complex fastening of large-dimensional components. The modular segmented structure simplifies assembly while maintaining frame strength

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dynamically adjustable pivotal joints enable simple assembly and disassembly operations. The joints allow members to be connected or disconnected through pivoting motions, which are mechanically simpler than securing large-dimensional components, thereby reducing assembly complexity while maintaining the strength benefits of optimized cross-sectional dimensions

Inventive Principle:

Principle #15Dynamics

3Weight of moving object

If thinner, lighter components are used, then frame weight is reduced, but bending forces increase requiring more robust connections

Engineering Contradiction:

Improveframe weightVSAvoidbending forces

Core Design Contradiction:

Weight of moving objectVSForce

Solution Approach 1:

The pivotally connected joints enable the frame members to dynamically adjust their orientations in response to applied loads. This dynamic behavior allows the thinner, lighter components to maintain structural efficiency by optimizing their load-bearing configurations in real-time, reducing excessive bending forces on individual members while keeping the overall frame weight low

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

By optimizing the geometric parameters and orientations of the frame members, the patent changes the stress distribution patterns. This parameter optimization ensures that bending forces are distributed more evenly across the frame structure, allowing thinner components to withstand loads that would otherwise create excessive bending moments in conventional designs

Inventive Principle:

Principle #35Parameter changes

4Force

If pivotally connected joints are used at specific work points, then bending forces are minimized, but manufacturing precision requirements increase

Engineering Contradiction:

Improvebending forcesVSAvoidjoint alignment precision

Core Design Contradiction:

ForceVSManufacturing precision

Solution Approach 1:

The pivotally connected joints are designed to self-align at the specific work points through their inherent mechanical geometry. The pivotal connection mechanism naturally guides the members into their correct orientations when assembled, reducing the need for high-precision manufacturing tolerances. The joints essentially self-correct minor alignment variations, minimizing bending forces without requiring extremely precise manufacturing

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12559192B2Frame for multi-wheeled vehicle

Publication Date: 2026.02.24 KAPPS JOHN CAMPBELL

AI summary

A multi-wheeled vehicle (e.g., bicycle, tricycle, quadricycle) frame includes a head tube, a seat tube, a top tube, a brace member, and a down tube. The seat tube is disposed away from the head tube. The top tube is coupled to the seat tube and coupled to the head tube. The brace member is coupled to the seat tube and coupled to the head tube. The down tube is coupled to the seat tube and coupled to the head tube.