PROBLEM TO BE SOLVED: To provide an insertion structure capable of restricting occurrence of unsatisfactory state generated by adhesion of foreign matters to a seal member to cause an interpolation member and an externally-inserted member of which relative positions can be changed to show fluid-tight state.SOLUTION: This invention relates to an insertion structure 101 comprising an interpolation member 54 and an externally-inserted member 4 externally inserted to the interpolation member 54, i.e. the externally-inserted member 4 that can change a relative position in an axial direction D1 between the interpolation member 54 and the externally-inserted member 4, an annular seal holding annular recess part 4d arranged at an inner peripheral surface 4j opposing against the interpolation member 54 at the externally-inserted member 4 or an outer peripheral surface opposing against the externally-inserted member at the interpolation member; an annular liquid-tight seal member 75 arranged at the annular seal holding annular recess part 4d for use in liquid-tight between the inner peripheral surface 4j of the externally-inserted member 4 and an outer peripheral surface 54d of the interpolation member 54, and annular grease holding annular grooves 81 to 84 arranged near the seal holding annular recess part 4d to store and hold grease G1.SELECTED DRAWING: Figure 4
【課題】互いの相対位置を変更可能な内挿部材と外挿部材とを液密にするシール部材に異物が付着することで生じる不具合の発生を抑制できる挿通構造体を提供する。【解決手段】内挿部材54と、内挿部材54に外挿される外挿部材4であって、内挿部材54と外挿部材4との軸方向D1の相対位置を変更可能な外挿部材4と、外挿部材4における内挿部材54と対向する内周面4j又は内挿部材における外挿部材と対向する外周面に設けられる環状のシール保持環状凹部4dと、シール保持環状凹部4dに配置され、外挿部材4の内周面4jと内挿部材54の外周面54dとの間の液密のための環状液密シール部材75と、シール保持環状凹部4dの近傍に設けられ、グリスG1を収容し、保持するための環状のグリス保持用環状溝81〜84と、を備える挿通構造体101。【選択図】図4
INSERTION STRUCTURE
挿通構造体
2017-05-25
Patent
Electronic Resource
Japanese