Multi-Wheel Link Mechanism for Stable Step-Climbing Travel

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Solution Overview

Problem

Existing traveling devices lack sufficient stability, particularly when encountering large steps or heavy loads.

Innovation Solution

A traveling device with a unique link mechanism connecting multiple wheels, allowing for rotational movement and balanced load distribution through left and right side link members and rotation members, which are attached to the vehicle body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If additional weight is added to improve stability, then traveling stability improves, but device weight increases

Engineering Contradiction:
Improvetraveling stabilityVSAvoiddevice weight
Core Design Contradiction:
Stability of the object's compositionVSWeight of moving object

Solution Approach 1:

The patent implements a link mechanism with rotation members that allow the wheel assembly to dynamically adapt to uneven surfaces and load conditions. The link members connect the wheels in a configuration that permits relative movement, enabling the system to maintain stability without requiring additional weight. This dynamic structure allows the wheels to adjust their positions independently while maintaining overall system balance.

Inventive Principle:
Principle #15Dynamics

2Stability of the object's composition

If device size is increased to improve stability, then traveling stability improves, but device size increases

Engineering Contradiction:
Improvetraveling stabilityVSAvoiddevice size
Core Design Contradiction:
Stability of the object's compositionVSVolume of moving object

Solution Approach 1:

The patent divides the wheel assembly into segmented components connected by link members. Instead of using a single large rigid structure, the system uses multiple smaller wheel units (first, second, and third wheels on each side) connected through link members with rotation members. This segmentation allows each component to be compact while the collective arrangement provides enhanced stability through the ability to adapt to terrain variations.

Inventive Principle:
Principle #1Segmentation

3Device complexity

If a simple wheel structure is used, then device complexity is reduced, but traveling stability deteriorates

Engineering Contradiction:
Improvestructure complexityVSAvoidtraveling stability
Core Design Contradiction:
Device complexityVSStability of the object's composition

Solution Approach 1:

The patent introduces link members and rotation members as intermediary elements between the wheels and the vehicle body. These intermediaries facilitate controlled movement and load distribution without requiring a complex overall structure. The link members act as mediators that transmit forces and allow relative motion, while the rotation members enable the link members to pivot, collectively providing stability through a relatively simple additive structure.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS12600421B2Traveling device
Publication Date: 2026.04.14 SHARP KK
  • US12600421B2 patent drawing
  • US12600421B2 patent drawing
  • US12600421B2 patent drawing

AI summary

A traveling device includes a first left side wheel, a second left side wheel, a third left side wheel, a first right side wheel, a second right side wheel, a third right side wheel, a first front left side link member, a second front left side link member, a third left side link member, a second rear left side link member, a first rear left side link member, a first front right side link member, a second front right side link member, a third right side link member, a second rear right side link member, and a first rear right side link member. A front left side rotation member is arranged on the second front left side link member, a rear left side rotation member is arranged on the second rear left side link member, a front right side rotation member is arranged on the second front right side link member, and a rear right side rotation member is arranged on the second rear right side link member.