Mobile Object With Adjustable Wheelbase And Tread Width

Solution Overview

Problem

Existing mobile objects with dual modes, such as electric wheelchairs and carts, face a trade-off between stability in riding mode and operability in cart mode due to conflicting design requirements, resulting in suboptimal performance in both modes.

Innovation Solution

A mobile object with a movable mechanism that allows the front and rear bases to extend and contract, adjusting the wheelbase and tread width, enabling seamless transitions between riding and cart modes by changing the seating surface's orientation and armrest positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the vehicle body is designed in conformity with the cart mode (smaller width), then the operability in a zippy manner is improved, but the stability in the riding mode is reduced

Engineering Contradiction:

Improveoperability in cart modeVSAvoidstability in riding mode

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The mobile object employs dynamic configuration changes by making the wheel base and tread width adjustable rather than fixed. The movable mechanism allows the front base to shift relative to the rear base, and the front wheels to change their lateral spacing, enabling the vehicle to adapt its physical dimensions based on the operational mode (cart or riding), thus resolving the contradiction between compact operability and stable riding

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes key geometric parameters (wheel base length and tread width) dynamically. In cart mode, the wheel base is shortened and tread width is reduced for maneuverability. In riding mode, the wheel base is extended and tread width is increased for stability. This parameter transformation allows the same vehicle to satisfy conflicting requirements for different operational states

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If the vehicle body is designed in conformity with the riding mode (larger width), then the stability is improved, but the operability in a zippy manner is lowered

Engineering Contradiction:

Improvestability in riding modeVSAvoidoperability in cart mode

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The mobile object employs dynamic configuration changes by making the wheel base and tread width adjustable rather than fixed. The movable mechanism allows the front base to shift relative to the rear base, and the front wheels to change their lateral spacing, enabling the vehicle to adapt its physical dimensions based on the operational mode (cart or riding), thus resolving the contradiction between compact operability and stable riding

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes key geometric parameters (wheel base length and tread width) dynamically. In cart mode, the wheel base is shortened and tread width is reduced for maneuverability. In riding mode, the wheel base is extended and tread width is increased for stability. This parameter transformation allows the same vehicle to satisfy conflicting requirements for different operational states

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If the wheel base is extended for stability in riding mode, then the stability is improved, but the length of the mobile object increases reducing zippy operability

Engineering Contradiction:

Improvestability in riding modeVSAvoidlength of mobile object

Core Design Contradiction:

Stability of the object's compositionVSLength of moving object

Solution Approach 1:

The mobile object employs dynamic configuration changes by making the wheel base and tread width adjustable rather than fixed. The movable mechanism allows the front base to shift relative to the rear base, and the front wheels to change their lateral spacing, enabling the vehicle to adapt its physical dimensions based on the operational mode (cart or riding), thus resolving the contradiction between compact operability and stable riding

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes key geometric parameters (wheel base length and tread width) dynamically. In cart mode, the wheel base is shortened and tread width is reduced for maneuverability. In riding mode, the wheel base is extended and tread width is increased for stability. This parameter transformation allows the same vehicle to satisfy conflicting requirements for different operational states

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11173080B2Mobile object

Publication Date: 2021.11.16 SUZUKI MOTOR CORP

AI summary

A mobile object is configured so as to be capable of moving front and rear bases 10,30 object to each other in order to make a wheel base provided between the front wheels 12 and the rear wheels 32 expandable and contractible. The front base 10 moves so as to be expand and contract the tread width between the front wheels 12 in association with the expansion and the contraction of the wheel base achieved. The seating part 41 is configured so as to turn forward in association with the relative movement of the front and rear bases 10,30 in order to contract the wheel base and the tread width. The seating part 41 is configured so as to turn backward in association with the relative movement of the front and rear bases 10,30 in order to expand the wheel base and the tread width.