Modular Wire Feeder Assembly With Motor Isolation Mounting
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Solution Overview
Problem
Existing wire feeders are costly and complex due to the need for different base assemblies to accommodate various motor types and lack of electrical insulation between the motor and drive assembly, which complicates motor attachment.
Innovation Solution
A modular wire feeder design featuring a base assembly with interchangeable motor mounting hole patterns and insulating components, including a mounting plate, intermediate plate, and insulating cap, providing electrical isolation between the motor and drive assembly using non-conductive materials and key-based shaft connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different base assemblies are used to accommodate various motor types, then the wire feeder can support multiple motor types, but the manufacturing cost and complexity increase
Solution Approach 1:
A single universal base assembly is designed with multiple motor mounting hole patterns that can accommodate different motor types. The base assembly includes a first hole pattern for a first motor type and a second hole pattern for a second motor type, allowing one base assembly to serve multiple motor configurations without requiring separate base assemblies for each motor type.
2Reliability
If electrical insulation components are added between the motor and drive assembly, then electrical isolation is achieved, but the device complexity and part count increase
Solution Approach 1:
The electrical insulation function is merged with the motor mounting plate function. The motor mounting plate is made of an electrically insulating material and serves dual purposes: providing mechanical support for mounting the motor and providing electrical isolation between the motor and the drive assembly. This eliminates the need for separate insulation components.
Solution Approach 2:
The motor mounting plate acts as an intermediary component between the motor and the base assembly. It provides electrical isolation while still allowing mechanical connection through insulating fasteners. The plate mediates between the electrical requirements (isolation) and mechanical requirements (mounting support).
3Ease of manufacture
If a modular design with interchangeable mounting patterns is implemented, then manufacturing cost is reduced, but the design complexity increases
Solution Approach 1:
The mounting plate is segmented with multiple distinct hole patterns, where each pattern corresponds to a specific motor type. This segmentation allows the single base assembly to be configured for different motors by simply changing which hole pattern is used, reducing the need for multiple complete base assembly variants while maintaining manufacturing efficiency.
Data Source
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AI summary
A wire feeder has a motor (102), mounting plate (1), intermediate mounting plate (4), and base assembly (101). The mounting plate (1) has a plurality of mounting hole patterns (21, 22) and a shaft hole (19). The motor (102) has a mounting hole pattern that aligns with at least one of the plurality. One of a plurality of motor types can be mounted to the mounting plate (1). The mounting plate (1) is mounted to the intermediate mounting plate (4), which is mounted to the base assembly (101). The base assembly (101) includes a drive gear (302), which is connected to rotate with an insulating cap (304) that receives a gear hub (306). The gear hub (306) is connected to rotate with the motor shaft (18) via matching keys. The insulating hub (306), intermediate mounting plate (4) and mounting plate (1) are electrically insulating, so that the base assembly (101) is electrically isolated from the motor (102).