Motor Cover Assembly with Interlocking Resin Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing pump device design requires screws for fixing the upper case to the sealing part, increasing component and manufacturing costs, and is prone to gaps that allow fluid infiltration due to integral formation of the sealing and partition members.
Innovation Solution
A motor design featuring a resin sealing member with protrusions and a cover member that engages without screws, using notch sections and engagement grooves for secure assembly, and an adhesive or semi-solid intrusion restraint member to prevent fluid entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws are used to fix the upper case to the sealing part, then the connection strength is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The upper case and sealing part are integrated into a single integral structure, eliminating the need for separate fastening components like screws. This merging of parts maintains connection strength while reducing device complexity and manufacturing cost.
Solution Approach 2:
The integral structure serves multiple functions simultaneously: it provides both the sealing function and the structural support function that would otherwise require separate components and fasteners, thereby simplifying the overall device.
2Ease of manufacture
If the sealing part and partition member are integrally formed, then the manufacturing process is simplified, but gaps may occur at the boundary allowing fluid infiltration
Solution Approach 1:
The integral structure is divided into multiple sections with protrusions and recesses that interlock with each other. This segmentation within integration maintains manufacturing simplicity while preventing gaps and fluid infiltration at boundaries through the interlocking geometry.
3Manufacturing precision
If fixed holes are formed after molding the sealing part, then the fixing position can be precisely controlled, but the manufacturing cost and process complexity increase
Solution Approach 1:
The protrusions and recesses are pre-formed as integral parts of the molded structure, establishing precise positioning and fixing capabilities during the molding process itself, rather than requiring subsequent operations to create fixed holes.
Data Source
AI summary
A motor provided with: a resin sealing member that is made from a resin and that covers a stator; and a cover member that is fixed to the resin sealing member. The protrusions protruding radially outward are formed on the resin sealing member. A part of the cover member on a Z2 direction side thereof is configured as a cylindrical cover section covering the resin sealing member from the outer circumferential side. The cover section has formed therein notch sections, engagement grooves that extend toward one side in the circumferential direction from the ends of the notch sections on a Z1 direction side and with which the protrusions engage, and a stopper restricting movement of the cover member toward the other side in the circumferential direction. The widths of the notch sections are wider than the widths of the protrusions in the circumferential direction.