Jet Pump Shield Assembly for Quick Transom Installation
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Solution Overview
Problem
Conventional jet pumps for watercraft require lengthy installation times, involve drilling numerous holes in the hull, leading to leakage and alignment issues, and are often not compatible with different watercraft sizes, causing vibration-related damage and discomfort.
Innovation Solution
A compact modular jet pump assembly with a shield configuration that allows for external assembly and quick installation through the transom, featuring a marine engine, jet drive, and a shield with a flange for securement, along with a gasket to prevent water ingress and dampen vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional jet pump installation methods are used, then the jet pump can be installed in the hull, but the installation time becomes lengthy (5-7 hours) and requires drilling numerous holes (approximately 67 holes)
Solution Approach 1:
The jet pump assembly is divided into separate modular components: the jet pump unit, the shield assembly, and the mounting bracket. This segmentation allows each component to be installed independently through fewer, strategically placed holes, reducing the total number of openings needed while maintaining structural integrity and functionality.
Solution Approach 2:
The shield assembly and mounting bracket are pre-assembled and prepared before installation. The shield is designed with pre-configured mounting features and alignment markers that facilitate quick attachment to the hull, eliminating the need for complex on-site assembly procedures and reducing overall installation time.
2Ease of operation
If multiple holes are drilled through the hull for jet pump and exhaust system components, then the components can be installed, but leakage opportunities increase and hull integrity is compromised
Solution Approach 1:
The exhaust system is extracted from the hull penetration requirement and routed externally. The shield assembly is designed to accommodate the exhaust system without requiring additional holes through the hull, thereby maintaining hull integrity while still providing accessible installation points for all necessary components.
Solution Approach 2:
The shield assembly acts as an intermediary structure that provides mounting surfaces and protection for both the jet pump and exhaust system. This intermediate structure allows components to be secured to the hull through minimal openings while the shield itself provides a barrier that reduces leakage risks at the interface between components and the hull.
3Adaptability or versatility
If the jet pump is configured for a single size or class of watercraft, then the design is simplified, but compatibility with different watercraft sizes is limited
Solution Approach 1:
The shield assembly and mounting bracket are designed with universal mounting features that can accommodate various jet pump sizes and watercraft types. The bracket includes adjustable mounting points and the shield provides a standardized interface that can be adapted to different hull configurations, allowing a single design to serve multiple applications without requiring custom configurations.
4Device complexity
If the jet pump is installed directly to the hull, then the structure is simplified, but vibrations are transferred to the hull causing damage and discomfort
Solution Approach 1:
Vibration damping elements are incorporated into the mounting bracket and shield assembly before installation. These damping elements are pre-positioned at the interface between the jet pump and the hull to absorb and dissipate vibrations, preventing their transmission to the hull structure while maintaining a simple direct mounting configuration.
Data Source
AI summary
A jet pump assembly includes a marine engine, a jet drive and a shield adapted to be secured to a transom of a watercraft. The shield has arms to which the marine engine is secured and legs to which the jet drive is secured, the arms and legs extending in opposite directions. The shield has a flange adapted to be secured to the transom of the watercraft. The shield covers an opening in the transom through which the jet pump assembly is passed during assembly. A gasket between the shield and transom prevents water from entering the watercraft.