| 摘要 |
A press-fitting, comprising a body ( 21 ) having an annular groove ( 213 ) on the rear end of its core portion, a jacket ( 22 ), a seal ring ( 23 ) and a plastic check ring ( 24 ) having a limit annular convex portion ( 242 ) that is fit to the annular groove ( 213 ), wherein said plastic check ring ( 24 ) is provided with an annular convex portion ( 241 ) and an inner hook ( 243 ) extending towards the annular convex portion ( 241 ), one end of said jacket ( 22 ) has an inward wall ( 221 ) for clamping with the inner hook ( 243 ), said body ( 21 ) has a seal groove ( 211 ) and a serrated groove with fillets ( 212 ) on its core portion, said seal ring ( 23 ) is disposed in said seal groove ( 211 ) with the outer diameter of the seal ring ( 23 ) being smaller than or equal to the outer diameter of the core portion. The press-fitting according to the present invention is of simple structure, and is convenient and quick to be assembled, and can be inspected, and is safe on seal coupling.
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