Demountable Cable Cutter for Propeller Shaft Installation
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Solution Overview
Problem
Existing line cutters for propeller shafts are costly to install and ineffective when a line gets caught around the first part of the shaft, as they require removal of the propeller and professional intervention, and are not designed for propeller shafts mounted on intermediate supports.
Innovation Solution
A line cutter with disassemblable parts that can be attached to the propeller shaft without removing it, featuring a hub with a blade and a locking screw to secure the cutter in place, allowing radial insertion of the shaft and preventing movement during cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cable cutter is mounted on the propeller shaft between the bracket and the propeller as in prior art, then the installation is straightforward, but it becomes ineffective if a rope becomes entangled around the first portion of the propeller shaft
Solution Approach 1:
The cable cutter is divided into two separable parts that can be assembled and disassembled. This segmentation allows the cutter to be installed on different portions of the propeller shaft (either before or after the bracket) depending on where the entanglement occurs, thereby maintaining cutting effectiveness while preserving installation ease
2Reliability
If the propeller is removed to install a cable cutter as in prior art, then the cable cutter can be properly installed, but the installation becomes expensive and requires professional intervention
Solution Approach 1:
The cable cutter is divided into two separable parts that can be assembled and disassembled. This segmentation allows the cutter to be installed on different portions of the propeller shaft (either before or after the bracket) depending on where the entanglement occurs, thereby maintaining cutting effectiveness while preserving installation ease
Data Source
Figure 1~4
AI summary
Cable cutter (10) comprising a hub (2) for attaching it to a boat's screw shaft (1) and a blade (3) carried by said hub, said cable cutter comprising several mutually demountable parts (11, 12) allowing the screw shaft (1) to be inserted radially into the hub (2).