Electric Balance Vehicle Axle Layout for Lightweight Stabilization

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Solution Overview

Problem

Existing electric balance vehicles with inner covers are bulky, heavy, expensive, or prone to corrosion and fatigue failure, and their central rotating mechanisms are inconvenient to grasp.

Innovation Solution

The electric balance vehicle design eliminates the inner cover and uses a support axle extending between wheel assemblies, with rotatable pedal housings and inertial sensors to control wheel assemblies for dynamic stabilization, and includes a limit structure to prevent damage to signal or power cables.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If an inner cover is used as the internal framework, then structural support is provided, but the vehicle becomes bulky, heavy, and expensive

Engineering Contradiction:

Improvestructural supportVSAvoidvehicle weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The patent removes the inner cover component entirely from the vehicle structure. Instead of using an inner cover as the internal framework, the design relies on the outer shell and internal component arrangement to provide structural support, thereby eliminating the weight and complexity associated with the inner cover

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The outer shell is designed to serve multiple functions: it provides structural support, protects internal components, and defines the vehicle's aesthetic appearance. This multi-functionality replaces the need for a separate inner cover that would otherwise provide structural support

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Strength

If an inner cover is used as the internal framework, then structural support is provided, but the vehicle complexity and manufacturing cost increase

Engineering Contradiction:

Improvestructural supportVSAvoidstructural complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The inner cover is extracted from the structure, simplifying the overall design. The patent uses a more straightforward assembly of the outer shell with internal components directly mounted or integrated, reducing the number of parts and assembly steps

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The structural support function previously divided between the inner cover and outer shell is now consolidated into the outer shell design. Internal frameworks or support structures are merged with the mounting arrangements of actual components like batteries and motors

Inventive Principle:

Principle #5Merging (Combining)

3Weight of moving object

If aluminum material is used for the inner cover, then lightweight structure is achieved, but corrosion resistance and rigidity deteriorate

Engineering Contradiction:

Improveinner cover weightVSAvoidcorrosion resistance

Core Design Contradiction:

Weight of moving objectVSReliability

Solution Approach 1:

The inner cover is removed from the design, eliminating the material selection dilemma. The patent achieves lightweight construction through the outer shell design and strategic placement of internal components without requiring a separate inner cover structure

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The outer shell is designed using composite construction techniques, potentially combining different materials or structures to achieve both lightweight properties and corrosion resistance without needing an inner cover

Inventive Principle:

Principle #40Composite materials

4Adaptability or versatility

If a large diameter central rotating mechanism is used, then platform rotation is enabled, but ease of operation deteriorates

Engineering Contradiction:

Improveplatform rotation capabilityVSAvoidgrasping convenience

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The rotation control is segmented into smaller, more manageable components. The patent uses individual rotation mechanisms for each platform that are positioned at the edges rather than a large central mechanism, making them easier to grasp and operate

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The rotation mechanism is moved from a central vertical arrangement to a lateral or distributed arrangement at the platform edges. This dimensional change allows users to access and operate the rotation controls more easily while maintaining the full rotation capability

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The design provides a lightweight, compact, and cost-effective vehicle with improved balance and maneuverability, reducing production complexity and enhancing user control through dynamic stabilization.

Implementation Method 1

Inertial sensors can be used to sense rotation of the second pedal housing and/or rotation of the frame with respect to the support axle

Methodology Applied

Scientific EffectInertial sensing: Accelerometer

Data Source

PatentUS12552487B2Electric balance vehicles

Publication Date: 2026.02.17 RAZOR USA LLC

AI summary

Various electric balance vehicles are described. In some embodiments, the vehicle has first and second pedal housings to support a respective foot of a user. The first and second pedal housings can be rotatable relative to each other. The vehicle can have first and second wheel assemblies. An axle can extend substantially between the wheel assemblies. In some embodiments, one pedal housing rotates relative to the axle and one housing is rotationally fixed relative to the housing. The vehicle can balance and provide locomotion to the user.