Floating Roller Guide Seed Lift for Compact Crystal Growth Winches
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Solution Overview
Problem
Existing silicon crystal growth systems using cable winch systems require larger and heavier components to convert drum rotation into translation, leading to increased size and weight, which is inefficient and costly.
Innovation Solution
A seed lifting mechanism incorporating a lift assembly with a floating roller guide assembly that converts drum rotation into translation using a helical groove and floating roller guide, reducing the need for lengthy threaded shafts and fixed nuts, thereby minimizing system size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lead screw and lead nut system is used to convert drum rotation into translation, then the drum can be translated along its axis of rotation, but the overall length of the cable winch system increases
Solution Approach 1:
The patent removes the lead screw and lead nut components from the system, extracting the problematic translation mechanism that caused length increase. Instead, it uses a simpler direct engagement system where the drum's rotation is converted to translation through the cable winding action itself, eliminating the need for separate threaded conversion components.
Solution Approach 2:
The patent inverts the conventional approach by not using a screw mechanism to convert rotation to translation. Instead, it allows the drum's rotation to directly produce translation through the cable's helical path around the drum, reversing the traditional mechanical conversion method.
2Ease of operation
If a lead screw and lead nut system is used to convert drum rotation into translation, then the drum can be translated along its axis of rotation, but the lift housing becomes larger and heavier
Solution Approach 1:
The patent removes the lead screw and lead nut components from the system, extracting the problematic translation mechanism that caused weight increase. Instead, it uses a simpler direct engagement system where the drum's rotation is converted to translation through the cable winding action itself, eliminating the need for separate threaded conversion components.
Solution Approach 2:
The patent merges the translation function directly into the drum's rotation mechanism. The cable's helical path around the drum combines the rotational and translational movements in a single integrated action, eliminating the need for separate lead screw and lead nut components that would add weight to the lift housing.
3Productivity
If the length of the lead screw is increased to accommodate greater translation distance, then the cable can be wound and unwound sufficiently to grow the crystal to desired length, but the overall length of the cable winch system increases
Solution Approach 1:
The patent employs a dynamic cable routing system where the cable follows a helical path around the drum that changes as the drum rotates and translates. This dynamic configuration allows the cable to accumulate sufficient length for crystal growth without requiring a proportionally long lead screw, as the cable's path length is determined by the drum's rotational and translational motion rather than a fixed threaded component.
Solution Approach 2:
The patent utilizes the three-dimensional helical path of the cable around the drum to achieve the necessary cable length. Instead of extending the lead screw in a single linear dimension, the system uses the drum's rotation to create a helical cable path that effectively multiplies the cable length available within a compact spatial envelope.
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 solution results in a lighter and more compact seed lifting and rotating system, reducing manufacturing costs and the required rotational force, while maintaining effective crystal growth capabilities.
Implementation Method 1
The drum forms a helical groove about an exterior surface of the drum. The floating roller guide is configured to engage at least a portion of the helical groove of the drum, causing the drum to translate via an engagement of the helical groove of the drum with the floating roller guide.
Implementation Method 2
The cable winch system is maintained under vacuum pressure to aid in reducing contaminates from entering the growing crystal.
Data Source
AI summary
A roller guide assembly for use in lifting a seed coupled to a cable includes a mounting plate, a shaft, and a roller guide. The mounting plate has a throughhole. The shaft is coupled to the mounting plate such that the shaft is movable relative to the mounting plate in a direction that is generally perpendicular to a central axis of the shaft. The roller guide is rotationally coupled about the shaft and generally positioned within the throughhole of the mounting plate such that at least a portion of the roller guide extends out of the throughhole.