BACKLASH-FREE PLUG-IN CONNECTION FOR PIPE LINES AND HOSE LINES

摘要

A plug-in connection for pipe lines or hose lines with a threaded-connection body and with a union nut screwed onto the threaded-connection body for the locked retention of a pipe piece inserted into the threaded-connection body by means of a securing ring that is supported against a retaining surface arranged on the pipe piece, wherein a floor surface of a chamber allocated to the securing ring incorporates a stepped recess for holding the securing ring, comprised of a first step and a second securing step adjoining the latter, wherein the chamber further incorporates a gasket that seals the inserted pipe piece against the threaded-connection body, and the pipe piece, by pressurizing the medium from its inserted position against the insertion direction relative to the threaded-connection body, can be transferred into its locked position, wherein a fixing ring is situated in the chamber between the securing ring and gasket, which abuts against the securing ring on the one hand and the gasket on the other, and is supported between the inserted pipe piece and a contact surface formed on the threaded-connection body and/or union nut and inclined in the direction of the securing ring relative to the longitudinal axis of the pipe piece, wherein the contact surface is given an inclination in which the fixing ring displaced into its fixed position by the pressurized gasket with the pipe piece in a locked position is clamped in a self-locking manner in the chamber, so that the pipe piece is fixed in place backlash-free.;The present invention can produce a backlash-free plug-in connection, without a person establishing the connection having to execute an additional assembly step.

主权项

1. A plug-in connection for pipe lines or hose lines with a threaded-connection body exhibiting a borehole for relaying a medium flowing through the pipe line or hose line, and with a union nut screwed onto the threaded-connection body for the locked retention of a pipe piece inserted into the threaded-connection body by means of a securing ring that is supported against a retaining surface arranged on the pipe piece, and is located in a chamber bounded by the union nut, threaded-connection body and pipe piece, wherein a floor surface of the chamber allocated to the securing ring incorporates a stepped recess for holding the securing ring, comprised of a first step situated adjacent to the chamber and set up to accommodate the securing ring during insertion of the pipe piece, and a second step adjoining the latter that secures the securing ring so that it abuts against the retaining surface of the inserted pipe piece, wherein the chamber further incorporates a gasket that seals the inserted pipe piece against the threaded-connection body, and the pipe piece, by pressurizing the medium from its inserted position against the insertion direction relative to the threaded-connection body, can be transferred into its locked position, in which the securing ring lies in the second step of the recess, wherein a fixing ring is situated in the chamber between the securing ring and gasket, and is supported between the inserted pipe piece and a contact surface formed on the threaded-connection body and/or union nut and inclined with an axial progression in the direction of the securing ring relative to the longitudinal axis of the pipe piece, wherein the contact surface is given an inclination in which the fixing ring displaced into its fixed position by the pressurized gasket with the pipe piece in a locked position is clamped in a self-locking manner in the chamber, so that the pipe piece is fixed in place backlash-free.