Vehicle Door Actuator Seal Rib Alignment
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Solution Overview
Problem
Existing vehicle door opening/closing actuators face issues with sealability and assemblability due to misalignment of sealing members, which can lead to compromised sealing and assembly challenges when the harness is routed from the battery to the actuator.
Innovation Solution
The actuator design incorporates a closed-bottom tubular seal section with a circumferential wall and a rib on the inner surface, and a concave section on the outer surface of the feeding apparatus, along with an auxiliary seal section, to prevent axial deviation and rotation of the seal section, enhancing both sealability and assemblability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing member is used to secure sealability between the actuator and harness, then sealability is improved, but the sealing member may shift or rotate causing misalignment that deteriorates assemblability
Solution Approach 1:
The rib and concave section are pre-formed on the feeding apparatus and seal section respectively, establishing precise alignment before final assembly. This preliminary positioning structure ensures the sealing member is correctly positioned before the harness is connected, preventing misalignment during assembly while maintaining effective sealing.
Solution Approach 2:
The rib on the inner circumferential surface of the seal section acts as an intermediary positioning element that interfaces with the concave section on the feeding apparatus. This intermediary structure mediates between the seal section and feeding apparatus, preventing axial deviation and rotation while ensuring proper alignment for both sealing and assembly purposes.
2Reliability
If the seal section is made secure to prevent shifting, then sealability is improved, but the structure becomes more complex
Solution Approach 1:
Instead of making the entire seal section complex, the invention applies a localized rib structure only on the inner circumferential surface where positioning is needed. This local quality approach provides the necessary anti-shifting functionality without complicating the overall seal section design, maintaining simplicity while improving reliability.
Solution Approach 2:
The rib structure introduces asymmetry to the otherwise symmetric seal section, creating a unique positioning feature that prevents rotation and axial deviation. This asymmetric rib-concave section interface provides secure positioning with minimal additional structural complexity, as the asymmetric feature is localized rather than distributed throughout the entire component.
Data Source
AI summary
A vehicle door opening/closing actuator includes a tubular housing, a motor part accommodated in the housing, a feeding apparatus accommodated in the housing and that supplies power to the motor part, and a closed-bottom tubular seal section that has a circumferential wall arranged to be interposed between an inner circumferential surface of the housing and an outer circumferential surface of the feeding apparatus, and that is arranged to cover the feeding apparatus with an entire thereof, wherein a rib extending in a circumferential direction is formed at an inner circumferential surface of the circumferential wall of the seal section, and a concave section that receives the rib is formed at the outer circumferential surface of the feeding apparatus.