Boat Drive Vibration Decoupling Arrangement
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Solution Overview
Problem
Existing boat drives, particularly outboard and pod drives, generate mechanical vibrations and noise emissions due to the transmission of vibrations from the drive unit to the mount and the boat, affecting the well-being of passengers and the environment, and increasing detection probability in sensitive areas.
Innovation Solution
A decoupling arrangement is introduced between the drive unit and the mount, utilizing resilient elements and materials to dampen or decouple vibrations, reducing noise emissions and vibration transmission to the boat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the drive unit is rigidly mounted to the boat, then structural stability and power transmission are improved, but vibrations and noise emissions increase
Solution Approach 1:
The patent introduces a decoupling arrangement with resilient elements (springs, dampers, elastomeric materials) as an intermediary between the drive unit and the boat structure. This mediator absorbs and dampens vibrations while still transmitting necessary mechanical forces, resolving the contradiction between rigid mounting for stability and flexible mounting for vibration reduction.
Solution Approach 2:
The decoupling arrangement employs composite structures combining different materials with complementary properties - metallic springs for elasticity, damping materials for vibration absorption, and rigid mounting points for structural support. This composite approach allows simultaneous achievement of structural integrity and vibration isolation.
2Object-generated harmful factors
If vibration damping measures are implemented, then noise emissions are reduced, but device complexity increases
Solution Approach 1:
The decoupling arrangement performs multiple functions simultaneously: it provides mechanical mounting, vibration damping, noise reduction, and shock absorption. By combining these functions into a single integrated system rather than separate components, the patent reduces overall device complexity while achieving comprehensive vibration control.
Solution Approach 2:
The patent utilizes flexible resilient elements and elastomeric materials that can be implemented as simple mounts or brackets rather than complex mechanical systems. These flexible components provide effective vibration damping through their material properties alone, avoiding the need for elaborate damping mechanisms.
3Object-generated harmful factors
If resilient elements are used for decoupling, then vibration transmission is reduced, but power transmission efficiency decreases
Solution Approach 1:
The decoupling arrangement employs dynamic resilient elements that adapt their stiffness and damping characteristics based on operating conditions. During normal operation, the system maintains sufficient rigidity for efficient power transmission, while automatically increasing vibration isolation when excitation frequencies match resonant frequencies, thus minimizing energy loss.
Solution Approach 2:
The patent utilizes resilient elements with carefully selected mechanical parameters (stiffness, damping coefficient, natural frequency) that optimize the balance between power transmission and vibration isolation. By adjusting these parameters, the system achieves high efficiency in the operating range while effectively isolating harmful vibrations.
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 decoupling arrangement significantly reduces vibrations and noise emissions, allowing boats to operate below noise limit values, enabling access to sensitive areas without disturbing fauna and improving fishing conditions by minimizing noise impact.
Implementation Method 1
a decoupling arrangement (4) for decoupling vibrations generated in the drive unit (2) between the drive unit (2) and the mount (3)
Implementation Method 2
The decoupling arrangement (4) comprises at least one resilient element
Data Source
Figure 1
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AI summary
The present invention relates to a boat drive (1) for driving a boat (100), comprising a drive unit (2) with an electric motor (22) and a holder (3) connected to the drive unit (2) for connecting the boat drive (1) to the boat (100), wherein the holder (3) is provided for spacing the drive unit (2) from a hull (110) of the boat (100), wherein a decoupling arrangement (4) for decoupling vibrations (S) generated in the drive unit (2) is arranged between the drive unit (2) and the holder (3).