Drive Device Cover Shields Lead Wire Holes
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Solution Overview
Problem
Existing drive devices require seal members to prevent foreign object intrusion during lead wire connections, which are unnecessary during device operation and complicate assembly.
Innovation Solution
A drive device design where the cover shields the lead wire insertion holes, allowing connection by soldering or welding without a seal member, reducing component count and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If seal members are provided in lead wire insertion holes to prevent foreign object intrusion, then foreign object prevention is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The cover is designed to simultaneously perform multiple functions: it closes the housing, provides mounting for the control unit, and shields the lead wire insertion holes from foreign objects. By merging these functions into a single component, the patent eliminates the need for separate seal members, reducing component count and assembly complexity while maintaining foreign object protection.
Solution Approach 2:
The cover serves as a multi-functional component that combines structural closure, component mounting, and foreign object shielding functions. This universal design allows a single part to address multiple requirements, eliminating the need for dedicated seal members in the lead wire insertion holes.
2Object-affected harmful factors
If seal members are provided in lead wire insertion holes to prevent foreign object intrusion, then foreign object prevention is improved, but ease of assembly deteriorates
Solution Approach 1:
The cover integrates foreign object shielding functionality into its basic structural form, eliminating the need for separate seal member installation steps. The cover's design inherently provides protection during lead wire connection while requiring only simple attachment to the housing.
Solution Approach 2:
The cover's structure automatically provides foreign object protection for the lead wire insertion holes through its inherent design as a closing component. No additional seal members or special assembly procedures are required - the cover itself performs the protective function simply by being installed on the housing.
3Object-affected harmful factors
If seal members are provided in lead wire insertion holes, then foreign object prevention is improved, but the number of components increases
Solution Approach 1:
The patent merges the foreign object shielding function with the cover component, eliminating the need for separate seal members. This consolidation reduces the total number of components while maintaining effective protection of the lead wire insertion holes during connection operations.
Solution Approach 2:
The cover is designed as a universal component that performs multiple functions including housing closure, control unit mounting, and foreign object shielding. This multi-functionality eliminates the need for dedicated seal members, thereby reducing the overall component count.
Data Source
AI summary
A drive device includes: a cover that is installed to an outer wall of a housing; a control unit that is installed in an inside of the cover; a terminal that extends from the control unit and extends through the cover; and a lead wire that extends from a coil and extends through the housing and the cover. The lead wire is electrically connected to the terminal at an outside of the cover. Therefore, the lead wire and the terminal can be connected together after installation of the cover to the housing. At this time, a lead wire insertion hole is shielded by the cover, and thereby it is possible to limit intrusion of solder debris into an inside of the housing through the lead wire insertion hole.