Motor Base Spigot Configuration for Vibration Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor devices face challenges in preventing deformation of the base during screwing and affixation, while also effectively restricting the transmission of motor vibrations to the circuit board, due to complex spigot configurations that require additional machining work and may lead to stress concentration.
Innovation Solution
A motor device design featuring a metallic base with a simplified spigot configuration, including a recessed portion with an annular spigot lateral surface, second and third projected portions, and strategically positioned attachment holes, which simplifies manufacturing and stabilizes the base during screwing, reducing deformation and vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a spigot configuration with multiple groove portions is employed to position the housing and base, then positioning accuracy is improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The patent merges multiple groove portions into a single annular groove that accommodates multiple spigot protrusions. This consolidation maintains the positioning function while significantly simplifying the spigot configuration structure and reducing manufacturing complexity.
Solution Approach 2:
The annular groove serves multiple functions: it positions the housing relative to the base, supports multiple spigot protrusions, and simplifies the overall spigot configuration. This multi-functional design reduces device complexity while maintaining positioning accuracy.
2Strength
If the base is screwed to the affixation object, then the motor device is secured, but the base may deform due to stress concentration
Solution Approach 1:
The patent introduces a recessed portion with an annular groove at the specific location where spigot protrusions make contact. This localized structural feature distributes the screwing stress around the periphery, preventing stress concentration and base deformation while maintaining securing strength.
3Manufacturing precision
If the spigot lateral surface is formed in series with the sealing surface, then positioning accuracy is improved, but additional machining work is required
Solution Approach 1:
The patent combines the spigot lateral surface formation with the annular groove structure. The spigot protrusions fit into the annular groove, providing positioning accuracy without requiring separate machining operations for multiple groove portions, thus reducing additional machining work.
Data Source
AI summary
A base includes first to third projected portions. A sealing surface of the base is opposed to the housing and equipped with a sealing member. An attachment portion outside the sealing surface is screwed with the housing. A first projected portion projects from the attachment portion toward the housing. The second and third projected portions project relative to the sealing surface toward the housing. A recessed portion between the sealing surface and the first projected portion partially receives and fitted with a spigot protrusion of the housing. The second projected portion is located inside the third projected portion, and the third projected portion is located inside the recessed portion in the radial direction. The second and third projected portions extend along the circumferential direction. The first to third projected portions have projected tip end surfaces located in a same plane and in contact with the housing.