Marine Drive Arrangement Transom Load Transfer
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Solution Overview
Problem
Conventional marine vessel drive arrangements face challenges in efficiently transmitting and managing the significant loads and forces from outboard drive units to the transom, which can lead to structural requirements that complicate design and increase weight and complexity.
Innovation Solution
A drive arrangement that redirects these loads to a supporting hull structure via a fixed supporting frame extending from the hull inside the vessel to the transom, allowing the transom to be thinner and lighter, and enabling a pre-assembled power transmission assembly with the outboard drive unit and power source, simplifying vessel production and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the supporting carrier is directly fixed to the transom to support the outboard drive unit, then the outboard drive unit can be securely mounted and forces can be transmitted, but the transom must be thick and heavy to withstand the loads and forces
Solution Approach 1:
The patent extracts the load-bearing function from the transom by introducing a separate supporting frame structure that extends from the supporting hull structure to the supporting carrier. This frame structure assumes the responsibility of withstanding thrust forces, steering forces, and crash forces, thereby releasing the transom from these heavy loading requirements and allowing it to be made thinner and lighter.
Solution Approach 2:
The patent segments the force transmission path by creating a distinct supporting frame structure that is separately fixed to the supporting hull structure (forward of the transom) and connects to the supporting carrier at the transom. This segmentation allows the hull structure to bear the primary loads rather than concentrating all forces on the transom.
2Ease of manufacture
If a traditional drive shaft connection is used through the transom opening, then the engine can be connected to the outboard drive unit, but the transom must be designed to handle all mechanical loads
Solution Approach 1:
The patent extracts the mechanical support function from the transom structure and assigns it to a separate supporting frame structure. This allows the transom to focus solely on its primary functions (sealing, access) while the frame structure handles the mechanical loads, simplifying the transom design and reducing its complexity.
3Reliability
If the supporting carrier is designed to withstand all forces from the outboard drive unit, then reliable support is achieved, but the overall structure becomes heavier and more complex
Solution Approach 1:
The patent extracts the primary load-bearing responsibility from the supporting carrier and transfers it to the supporting frame structure that is fixed to the hull. The supporting carrier now only needs to provide local support and connection points, significantly reducing its structural complexity while maintaining reliability through the distributed force transmission path.
Solution Approach 2:
The patent segments the force transmission system into multiple components: the supporting frame structure attached to the hull, the supporting carrier at the transom, and the connection between them. This segmentation allows each component to be optimized for its specific function rather than requiring one oversized component to handle all loads.
Data Source
AI summary
A drive arrangement for a marine vessel. The drive arrangement includes an outboard drive unit provided with at least one propeller, wherein the outboard drive unit is configured to be arranged on an outside of a transom of the marine vessel and to be connected via an opening in the transom to further parts of the drive arrangement arranged inside the marine vessel; and a supporting carrier configured to be arranged at the opening in the transom for fastening and support of the outboard drive unit so as to take up thrust and steering forces from the outboard drive unit when the drive arrangement is installed and used for propelling the marine vessel. The drive arrangement includes a supporting frame structure configured to be fixed to a supporting hull structure arranged on an inside of the marine vessel forward of the transom. The supporting frame structure extends aft-wards from or along the supporting hull structure to the opening in the transom. The supporting carrier forms part of or is firmly fixed to the supporting frame structure.