Jet Propelled Boat Deck Structural Reinforcement

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Solution Overview

Problem

Conventional jet propelled boats face challenges in enhancing the strength of their decks to effectively withstand wind and water resistance, which can lead to deformation during operation.

Innovation Solution

The implementation of a pair of frames on either side of the deck, with connectors that span the upper and lower decks, providing structural reinforcement and reducing deformation by connecting the decks securely, while also incorporating features like inclined connectors, through-holes for wind passage, and reinforcing ribs to enhance strength and reduce wind exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the deck structure is simplified, then the ease of manufacture is improved, but the strength of the deck deteriorates

Engineering Contradiction:

Improveease of manufactureVSAvoidstrength of deck

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The deck is divided into an upper deck and a lower deck as separate components. This segmentation allows each deck to be manufactured independently with simpler processes, while the overall structure maintains high strength through the distributed framework and connectors that join the segments together.

Inventive Principle:

Principle #1Segmentation

2Strength

If the deck structure is reinforced with more supports, then the strength is improved, but the device complexity increases

Engineering Contradiction:

Improvestrength of deckVSAvoiddevice complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The framework and connectors are designed to perform multiple functions simultaneously. The framework provides both structural support and defines the spatial relationship between upper and lower decks, while the connectors both join the decks together and transfer loads between them. This merging of functions reduces the number of separate components needed.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The framework structure serves multiple purposes: it provides structural reinforcement, defines the geometric relationship between decks, and acts as a mounting structure for other components. The connectors not only join the decks but also provide pathways for wind passage and contribute to overall structural rigidity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If the deck is made larger to accommodate users, then the ease of operation is improved, but the deformation under wind and water resistance increases

Engineering Contradiction:

Improveease of operationVSAvoiddeformation of deck

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The deck structure transitions from a single-plane design to a multi-level three-dimensional structure with upper and lower decks. This dimensional change allows the structure to span larger horizontal areas for user accommodation while maintaining structural stability through vertical support elements and distributed load paths across multiple levels.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS11541978B2Jet propelled boat

Publication Date: 2023.01.03 YAMAHA MOTOR CO LTD

AI summary

A jet propelled boat includes a boat body including a hull and a deck located above the hull, and a pair of frames, one frame provided on each of a right side and a left side of the deck so as to sandwich the deck in a right-left direction of the jet propelled boat. The deck includes an upper deck and a lower deck, and each of the pair of frames includes a connector that spans the upper deck and the lower deck so as to connect the upper deck to the lower deck.