Rotating Actuator Housing Lock Geometry for Vibration Resistance
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Solution Overview
Problem
Existing rotating devices face reliability issues due to easy disengagement of engagement parts under vibration forces, which can compromise their functionality.
Innovation Solution
A rotating device design featuring a housing with opposing first and second housings, where the side wall of the second housing includes a first hook and the first housing has a first protruding part, with inclined surfaces on the hook and protruding part to prevent separation, enhancing engagement reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a housing is assembled using an engagement part, then the device can be easily assembled, but the engagement is easily disengaged when a reaction force caused by vibration of the motor or the like is applied to the engagement part
Solution Approach 1:
The engagement part utilizes an inclined surface (curved/angled geometry) instead of a simple protrusion-cavity configuration. The inclined surface allows the engagement part to smoothly transition into the engaged position during assembly while creating a mechanical interlock that resists disengagement forces from motor vibration.
Solution Approach 2:
The inclined surface of the engagement part is designed to preemptively counteract the reaction forces generated by motor vibration. The geometry of the inclined surface creates a mechanical advantage that prevents disengagement before vibration forces can act on the connection.
2Device complexity
If the surface of the first hook and the first protruding part are perpendicular to each other, then the structure is simple, but the engagement is unstable under external forces
Solution Approach 1:
The engagement surfaces are designed with inclined angles rather than perpendicular configurations. This angular geometry provides mechanical stability by distributing external forces across the inclined surfaces, preventing easy disengagement while maintaining a relatively simple overall structure.
Data Source
AI summary
A rotating device includes a housing, a motor, and one or more gears. The housing includes a first housing and a second housing engaging with the first housing. The motor and the one or more gears are accommodated in the housing. The first housing and the second housing oppose one another in a first direction. A side wall part of the second housing is provided with a first hook, and a side wall part of the first housing is provided with a first protruding part. The first protruding part engages with the first hook. A surface of the first hook engaging with the first protruding part and a surface of the first protruding part engaging with the first hook are in contact with one another in the first direction. The surface of one of the first hook and the first protruding part is inclined with respect to the surface of the other of the first hook and the first protruding part, and the surface of the first protruding part faces the side wall part of the first housing.