Motor Stator Seat Waterproof Structure Using O-Ring Seal
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Solution Overview
Problem
Existing motor designs fail to effectively prevent moisture from entering the control chamber when used outdoors, particularly at the point where cables pass through the stator seat, compromising the motor's waterproof integrity.
Innovation Solution
A waterproof stator seat and connector structure incorporating a pillow, a connector, a waterproof element, and cables, where a sleeve extends from the pillow with a cap covering it, and an O-ring is used between the waterproof element and the pillow to create a sealed environment, preventing moisture ingress through an annular groove and insertion holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cables are passed through the stator seat to connect the control module, then electrical connection is achieved, but waterproof integrity is compromised allowing moisture ingress
Solution Approach 1:
The connector is divided into multiple components: a connector body, a waterproof element (grommet), and a sealing element (O-ring). This segmentation allows each component to perform its specific function - the connector body provides structural support, the waterproof element protects the cable entry point, and the O-ring creates the actual seal - while collectively maintaining both electrical connectivity and waterproof integrity
Solution Approach 2:
The waterproof element acts as an intermediary component between the cable and the stator seat. It is installed in a through-hole of the stator seat and provides a transition path for the cable while maintaining the waterproof barrier. The O-ring sealing element further mediates the seal between the waterproof element and the stator seat, allowing cable passage without compromising waterproof integrity
2Ease of manufacture
If a simple cable passage is used through the stator seat, then installation is simple, but moisture can enter the control chamber
Solution Approach 1:
The waterproof element and O-ring sealing element are pre-installed in the through-hole of the stator seat before the cable is inserted. This preliminary action ensures that the waterproof barrier is already in place and properly positioned, so that when the cable is passed through, moisture ingress is prevented from the outset without requiring complex post-installation sealing procedures
Solution Approach 2:
The O-ring sealing element is made of flexible material that can deform to accommodate the cable while maintaining the seal. This flexibility allows the sealing element to adapt to the cable's presence and maintain effective contact with both the waterproof element and the stator seat, preventing moisture ingress while allowing simple cable installation
Data Source
AI summary
A stator seat of a motor includes a pillow, a connector, a waterproof element and cables. A sleeve is extended from the pillow. A cap covers the pillow and sleeve. A control chamber is formed and enclosed by the cap and pillow. The pillow has a through hole communicated with the control chamber. The connector corresponsive to the through hole is installed in the control chamber and includes a first connecting structure. The waterproof element covers the through hole and includes an annular groove and an O-ring clamped between the waterproof element and pillow, and a second connecting structure. The first and second connecting structures are passed through the through hole. An insertion hole is penetrated through the waterproof element. Each of the cables has an end connected to the connector and the other end passed out from the pillow through the insertion hole and through hole.