Conducting Rotary Table with Recessed Connection Terminal
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Solution Overview
Problem
Existing workpiece support devices for arc-welding lack effective solutions for maintaining electrical connectivity and preventing dust ingress during rotary motion, leading to potential conductivity losses and mechanical complications.
Innovation Solution
A workpiece support device featuring a conducting rotary table, offset motor, sliding collecting brushes, and a liquid-proof cover with an inclined connection terminal that maintains electrical connection and prevents dust entry, allowing for flexible cable routing and reduced mechanical complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connection terminal is disposed on the side of the rotary table for external cable connection, then electrical connectivity is maintained during rotation, but dust can easily enter the connection area causing conductivity loss
Solution Approach 1:
The connection terminal is nested within a recess formed in the liquid-proof cover, creating a protected cavity that shields the electrical connection from dust while maintaining accessibility for cable attachment during rotary operation
Solution Approach 2:
The liquid-proof cover provides localized dust protection specifically at the connection terminal area, while the rest of the rotary table remains exposed for its primary rotating function, creating differentiated protection zones
2Stability of the object's composition
If the motor is disposed centrally on the rotation axis, then rotational balance is improved, but the collecting brush and connection terminal arrangement becomes mechanically complex
Solution Approach 1:
The motor is deliberately positioned asymmetrically at an offset location rather than centrally on the rotation axis, accepting a slight imbalance in exchange for significantly simplified mechanical arrangement of the collecting brush and connection terminal components
Solution Approach 2:
The motor position parameter is changed from central (0,0) to an offset location, fundamentally altering the spatial configuration to reduce mechanical complexity while maintaining functional performance
3Ease of manufacture
If the connection terminal is disposed on a flat surface, then manufacturing is simplified, but cable routing flexibility is limited requiring disassembly for changes
Solution Approach 1:
The connection terminal is positioned on a vertically extended surface created by the recess depth rather than a flat horizontal surface, adding a vertical dimension that enables flexible cable routing in multiple directions without requiring disassembly
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
Ensures consistent electrical conductivity during rotation, prevents dust accumulation, and allows for easy cable management without disassembly, enhancing the reliability and usability of the workpiece support device.
Implementation Method 1
a collecting brush disposed on the rear side of the base so as to be slidable on the outer circumferential surface of a conducting shaft fixed to the rotary table
Implementation Method 2
a liquid-proof cover surrounding the collecting brush and the outer circumferential surface of the shaft in a liquid-tight state
Data Source
AI summary
A workpiece support device including a base; a conducting rotary table that supports a workpiece and that is rotatable about a horizontal rotation axis; a motor that rotationally drives the rotary table; a collecting brush disposed on the base slidable on the outer circumferential surface of a conducting shaft fixed to the rotary table and extending along the rotation axis; a connection terminal that is electrically connected to the collecting brush and to which an external cable is connected; and a liquid-proof cover surrounding the collecting brush and the outer circumferential surface of the shaft. The liquid-proof cover includes an upper back-plate portion that is disposed at the same position as the rear end of the motor, and a lower back-plate portion located below the upper back-plate portion and forming a recess. The connection terminal penetrates through the lower back-plate portion and projects into the recess.