关键词: 变速箱；结合面渗油；失效机理；接触应力；防错设计

Abstract: Oil seepage is a prevalent quality issue in the field of mechanical manufacturing. Interface oil seepage in transmissions is a particularly common and challenging problem in vehicle maintenance, leading not only to resource waste and environmental pollution, but also potentially causing equipment failures and safety hazards. In response to the frequent occurrence of interface oil seepage in a certain type of transmission during its early usage stage, this paper conducts a systematic fault analysis, delves into the core mechanism of the seepage, and proposes targeted corrective measures. Innovatively, a tripartite solution is introduced, comprising error-proofing tooling design, a dual-level inspection protocol, and optimized assembly processes. After implementation, the failure rate significantly decreased. The solution features minimal structural modifications, low cost, and ease of promotion, providing theoretical support for the reliability design of transmission sealing.It can be widely applied to resolve similar oil seepage issues.

Key words: transmission; interface oil seepage; failure mechanism; contact stress; error-proofing design