Plug Connection Seal Groove Formed by an Insertion Sleeve

The invention extracts the harmful machining process from the receiving part manufacturing. Instead of machining the annular groove directly into the receiving part (which generates metal shavings), the groove is formed by the insertion sleeve that is inserted into the receiving part. The groove is created by the interface between the insertion sleeve's front peripheral edge and the annular shoulder, eliminating metal shaving generation while maintaining precise groove formation for the ring seal.

The insertion sleeve acts as an intermediary element that forms the annular groove. Rather than directly machining the groove into the receiving part, the insertion sleeve mediates the groove formation process. The groove is created by the interaction between the insertion sleeve's front peripheral edge and the annular shoulder of the receiving part, allowing precise groove formation without generating harmful metal shavings in the receiving part itself.

The invention merges the formation of the annular groove with the insertion of the insertion sleeve into a single operation. The insertion sleeve is designed with a specific geometry where its front peripheral edge, when inserted against the annular shoulder, automatically forms the annular groove for the ring seal. This combines what could be separate operations (inserting the sleeve and forming the groove) into one integrated action, simplifying the overall assembly process.

The insertion sleeve is designed to automatically form the annular groove through its own insertion movement. The geometry of the insertion sleeve's front peripheral edge and the annular shoulder are configured such that the groove forms itself during the insertion process, without requiring additional machining or assembly steps. The insertion sleeve essentially creates its own mounting groove through the insertion action itself.

The invention employs a composite fastening mechanism that combines friction fit (based on surface friction between the insertion sleeve and receiving part) with mechanical interlocking (through the annular groove and ring seal). The friction fit provides initial holding and positioning, while the annular groove containing the ring seal provides additional mechanical retention and sealing force, creating a composite fastening system that achieves both ease of assembly and sufficient holding strength.

The annular groove with the ring seal introduces a curved, elastic element into the otherwise linear friction fit connection. The ring seal's elastic deformation and curvature provide additional holding force and mechanical interlocking beyond the simple friction fit, enhancing the holding strength while maintaining the simplicity of the insertion process. The curved geometry of the seal allows it to conform to the groove and provide radial retaining force.