Motor Unit Chamber Guide for Liquid Ingress Prevention
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Solution Overview
Problem
In traditional motor devices with a flow path, liquid such as lubricating oil can adhere to the inner surfaces and flow towards the motor, potentially entering the motor chamber.
Innovation Solution
A motor unit design that includes a motor with a first chamber, a rotary member coupled to the shaft outside the first chamber, a housing with a second chamber, and a guide member with a peripheral wall and a third chamber. The design features a fourth chamber outside the first chamber, open to the inner surfaces of the second and third chambers, with a guide extending from the rotation axis to the fourth chamber, allowing liquid to flow by gravity into the fourth chamber and preventing it from entering the first chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional flow path is used to discharge liquid, then liquid flowing downward by gravity can be discharged, but liquid scattered by rotational member adheres to inner surface and flows toward motor inside
Solution Approach 1:
The device is divided into multiple chambers: a first chamber for the motor, a second chamber for the rotary member, and a third chamber for collecting scattered liquid. This segmentation isolates the motor from liquid ingress while providing a dedicated collection zone for scattered liquid, resolving the contradiction between protecting the motor and managing liquid complexity.
Solution Approach 2:
The third chamber acts as an intermediary between the second chamber (where liquid scatters) and the motor. It captures liquid that would otherwise adhere to surfaces and flow toward the motor, serving as a buffer zone that prevents direct liquid contact with the motor while maintaining the overall system structure.
2Loss of substance
If liquid is discharged from flow path, then liquid can be removed from system, but scattered liquid adheres to surfaces and cannot be effectively discharged
Solution Approach 1:
The third chamber is designed to automatically collect and contain scattered liquid through its geometric configuration and positioning. The chamber's structure naturally directs scattered liquid into its space, and the liquid can be discharged through gravity or pressure differential without requiring additional active discharge mechanisms, enabling self-service liquid management.
Solution Approach 2:
The solution moves liquid management from a linear flow path concept to a three-dimensional chamber-based approach. The third chamber provides a volumetric space for liquid collection, allowing liquid to be contained and managed in a different spatial dimension rather than relying solely on surface-level flow paths, thereby improving discharge effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The motor unit effectively prevents scattered liquid from entering the motor chamber by guiding it into a separate chamber using gravity, thus maintaining the motor's internal cleanliness and preventing potential damage from liquid ingress.
Implementation Method 1
the liquid received by the inside of the third chamber flows by gravity into the fourth chamber along the guide
Implementation Method 2
the shaft and the rotary member may rotate while having liquid adhered thereto. In such a case the liquid scatters by centrifugal force. In this regard, the peripheral wall surrounds the rotation axis, so that the scattering liquid can be received by the inside of the third chamber
Data Source
AI summary
A motor unit includes: a motor provided with a first chamber and including a shaft; a rotary member coupled to the shaft outside the first chamber; a housing provided with a second chamber accommodating the rotary member; and a guide member including a peripheral wall between the first chamber and the second chamber, the guide member being provided with a third chamber inside the peripheral wall, wherein the motor unit is provided with a fourth chamber which is outside the first chamber and is open to an inner surface of the second chamber and/or the third chamber, the inner surface of the third chamber includes a guide, and the guide extends farther away from a rotation axis as is closer to the fourth chamber.