Movable Cabin Cover Linkage for Flush Opening and Lower Weight

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Solution Overview

Problem

Existing movable object cabins face issues with foreign substances entering due to step differences between covers and bodies, hindering operation and increasing weight and cost due to multiple operating devices.

Innovation Solution

A cabin design with a single operating member using a cover moving part that combines linear and rotational motions through an operating rotation shaft, link members, and elastic members to eliminate step differences, reducing weight and cost.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If multiple operating devices are provided to perform rectilinear motion and rotational motion of the cover, then the cover operation is improved, but the weight and unit price of the movable object increase

Engineering Contradiction:

Improvecover operationVSAvoidweight

Core Design Contradiction:

Ease of operationVSWeight of moving object

Solution Approach 1:

The patent combines multiple operating devices into a single operating member that performs both rectilinear and rotational motions. The operating member includes an operating rotation shaft that rotates, and a link member with an elastic portion that converts this rotation into both linear displacement and rotational movement of the cover, eliminating the need for separate actuators for each motion type.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The operating member is designed as a multi-functional component that simultaneously achieves multiple objectives: it provides rectilinear motion to eliminate the step difference between cover and body, provides rotational motion to open/close the cover, and uses the elastic portion to store and release energy for smooth operation. This single component replaces what would traditionally require multiple separate devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If multiple operating devices are provided to perform rectilinear motion and rotational motion of the cover, then the cover operation is improved, but the unit price of the movable object increases

Engineering Contradiction:

Improvecover operationVSAvoidunit price

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses an elastic portion (such as a spring) that is relatively simple and inexpensive to manufacture compared to multiple motorized actuators. The elastic component can be easily replaced if needed and provides the necessary mechanical advantage without requiring complex electronics or multiple power sources, thereby reducing overall manufacturing costs.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Ease of operation

If the cover and body have a predetermined step difference for smooth opening and closing, then the cover operation is improved, but foreign substances are introduced into the internal space

Engineering Contradiction:

Improvecover operationVSAvoidforeign substances introduction

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent eliminates the step difference between the cover and body before the cover opening operation begins. The link member is designed to advance the cover in the opening direction by a predetermined distance (equal to the step difference) before the cover starts its rotational opening motion. This preliminary linear movement ensures that the cover and body surfaces are flush, preventing foreign substance entry while maintaining smooth operation.

Inventive Principle:

Principle #10Preliminary action

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 simplifies the operation by eliminating step differences, reduces weight, and lowers manufacturing costs while ensuring smooth cover movement.

Implementation Method 1

the second link having (i) a first end rotatably connected to the first link and (ii) a second end rotatably connected to the cover, where the second link is configured to stretch and contract

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

an operating member including an operating rotation shaft that extends in an axial direction intersecting the first direction, the operating member being disposed at the body and configured to rotate about the operating rotation shaft

Methodology Applied

Scientific EffectMechanical Advantage: Mechanical Advantage

Data Source

PatentUS20250381905A1Cabin for movable object and movable object including the same

Publication Date: 2025.12.18 HYUNDAI MOTOR CO LTD

AI summary

A cabin for a movable object includes a body having an opening, a cover configured to open and close the opening, and a cover moving part disposed in the body, coupled to the cover, and configured to linearly move or rotate the cover. The cover moving part includes a link member connected to the cover and configured to transmit power to the cover. The link member includes a first link connected to a rotary shaft and a second link that connects the first link to the cover, where the second link is stretchable and contractible to thereby adjust a spacing distance between two opposite ends of the second link.