Electric Watercraft Cable Layout for Steering and Maintenance

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

In electrically powered watercraft, the existing wiring arrangements often hinder operation and maintenance due to limited space and potential strain on cables during steering, and there is a need for a more compact and protected configuration.

Innovation Solution

The solution involves a separate battery box and electrical box arrangement with cables routed through protective compartments and fittings, such as tubular members, to maintain cable integrity and prevent water intrusion, allowing for compact and strain-free operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If cables are routed directly from electrical box to propulsion device, then wiring is simple, but cables suffer undue strain during steering operations

Engineering Contradiction:
Improvewiring complexityVSAvoidcable strain resistance
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

A cable management system with guide pulleys and tensioning mechanisms is introduced as an intermediary between the electrical box and propulsion device. The guide pulleys redirect cable paths around the steering arc, while tensioning mechanisms absorb excess cable length, preventing undue strain during steering operations while maintaining a relatively simple overall wiring layout.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Volume of moving object

If electrical components are housed in compact arrangement, then space utilization is improved, but access for operation and maintenance becomes difficult

Engineering Contradiction:
Improvespace utilizationVSAvoidaccessibility for maintenance
Core Design Contradiction:
Volume of moving objectVSEase of operation

Solution Approach 1:

The electrical system is segmented into modular units (electrical box, propulsion device, cable management sections) that can be independently accessed. The electrical box is positioned with access panels or removable covers that allow maintenance personnel to reach internal components without disassembling the entire system, while the overall compact arrangement is preserved through efficient spatial organization of these modular segments.

Inventive Principle:
Principle #1Segmentation

3Volume of moving object

If cables are routed close to propulsion device, then wiring is compact, but cables clutter the surrounding area and interfere with steering motion

Engineering Contradiction:
Improvewiring compactnessVSAvoidsteering operation freedom
Core Design Contradiction:
Volume of moving objectVSEase of operation

Solution Approach 1:

The cable routing system utilizes three-dimensional space by routing cables vertically and laterally through designated channels and conduits rather than solely in the horizontal plane near the propulsion device. Guide pulleys positioned at elevated locations redirect cables overhead or along the hull structure, clearing the immediate surrounding area of the propulsion device while maintaining compact overall wiring through efficient use of available spatial dimensions.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20240317377A1Electrically powered watercraft
Publication Date: 2024.09.26 HONDA MOTOR CO LTD
  • US20240317377A1 patent drawing
  • US20240317377A1 patent drawing
  • US20240317377A1 patent drawing

AI summary

An electrically powered watercraft, comprising a hull (1), a propulsion device (2) provided at a stern of the hull and including a motor (10) and a propulsion unit (11) driven by the motor, an electrical box (6) that is placed on one side of a rear part of the hull and houses an electric component therein, a battery box (5) for housing a battery for supplying electric power for driving the motor, the battery box being positioned at a predetermined distance in front of the electrical box, a first cable (6) extending from the battery box to the electrical box, and a second cable (7) extending from the electrical box to the motor.