Dual Sealing Member Assembly for Axial Interval Control
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Solution Overview
Problem
Existing sealing devices for preventing the mixing of two kinds of liquids, such as engine oil and transmission oil or grease, often require separate handling and maintenance of their sealing members, making it difficult to maintain the axial interval between them effectively and risking foreign matter intrusion.
Innovation Solution
A sealing device comprising two interlocking sealing members with hooks and stoppers that allow for combined handling as a single assembly, where the hooks restrict separation and stoppers maintain axial interval, while clearances between them prevent foreign matter from reaching the sealed area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two sealing members are used to prevent mixing of two kinds of liquids, then sealing effectiveness is improved, but handling difficulty increases and axial interval maintenance becomes problematic
Solution Approach 1:
The patent combines two separate sealing members into a single integrated assembly by providing engagement protrusions on one sealing member that engage with engagement recesses on the other sealing member. This merging allows the two sealing members to be handled as one unit, improving ease of operation while maintaining the dual-sealing configuration needed for effective sealing between two kinds of liquids.
2Ease of operation
If two sealing members are combined as a single assembly, then handling ease is improved, but maintaining the axial interval between sealing members becomes difficult
Solution Approach 1:
The patent introduces a spacer as an intermediary component between the two sealing members. This spacer maintains a predetermined axial interval between the sealing members while allowing them to be combined into a single handleable assembly. The spacer acts as a mediator that preserves the necessary spacing without compromising the integrated handling of the assembly.
3Adaptability or versatility
If sealing members are mounted separately on the housing, then installation flexibility is improved, but the risk of foreign matter intrusion between sealing members increases
Solution Approach 1:
The patent combines the two sealing members into a single integrated assembly with engagement protrusions and recesses that secure their relative positions. This combination reduces the risk of foreign matter intrusion between the sealing members by eliminating the gap that would exist if they were mounted separately, while still allowing flexible installation of the entire assembly as one unit.
Data Source
AI summary
A sealing device includes a first sealing member and a second sealing member that are mounted on a housing, the outer peripheral surface of the rotational shaft being in slidable contact with the first sealing member and the second sealing member. Distal portions of multiple first hooks formed on the first sealing member are hooked on the distal portions of multiple second hooks formed on the second sealing member for restricting movement of the second sealing member away from the first sealing member in the axial direction of the sealing device. Distal portions of multiple first stoppers formed on the first sealing member are in contact with the distal portions of multiple second stoppers formed on the second sealing member for restricting movement of the second sealing member toward the first sealing member in the axial direction.