Joint unit and joint assembly comprising such a joint unit for non-detachable connection of media-conveying lines

A joint unit, comprising:

• a main body, connected with a connecting piece not forming part of the joint unit;
• a bush, which, when the joint unit is assembled, is fastened to the main body in the direction of a longitudinal axis of the joint unit and forms with the main body a receiving space open towards the free end thereof, which space receives the connecting piece;
• and
• a retaining unit formed separately from the bush, which is arranged in a circumferential groove in the bush, the circumferential groove being open radially inwards relative to the longitudinal axis,
• the retaining unit comprising a first bearing surface directed in the opening direction of the receiving space, for interacting with a first mating bearing surface of the bush directed opposite to the opening direction, and
• the retaining unit further comprising a second bearing surface directed opposite to the opening direction, for interacting with a second mating bearing surface of the connecting piece directed in the opening direction,
• wherein the radially inwardly open circumferential groove in the bush is open in at least two circumferential portions towards an axial end face of the bush.

A joint unit, comprising:

• a main body, connected with a connecting piece not forming part of the joint unit;
• a bush, which, when the joint unit is assembled, is fastened to the main body in the direction of a longitudinal axis of the joint unit and forms with the main body a receiving space open towards the free end thereof, which space receives the connecting piece;
• and
• a retaining unit formed separately from the bush, which is arranged in a circumferential groove in the bush, the circumferential groove being open radially inwards relative to the longitudinal axis,
• the retaining unit comprising a first bearing surface directed in the opening direction of the receiving space, for interacting with a first mating bearing surface of the bush directed opposite to the opening direction, and
• the retaining unit further comprising a second bearing surface directed opposite to the opening direction, for interacting with a second mating bearing surface of the connecting piece directed in the opening direction,
• wherein at least one fastening element provided for axial fastening of the bush to the main body is configured as a locking element with a spring web connected to the bush and extending axially opposite to the opening direction of the receiving space, and a locking lug projecting radially inwards from the free end of the spring web, which locking lug engages in a locking recess formed in the main body.

A joint assembly, comprising:

• a connecting piece;
• and
• a joint unit, the joint unit comprising:
• a main body, connected with the connecting piece;
• a bush, which, when the joint unit is assembled, is fastened to the main body in the direction of a longitudinal axis of the joint unit and forms with the main body a receiving space open towards the free end thereof, which space receives the connecting piece;
• and
• a retaining unit formed separately from the bush, which is arranged in a circumferential groove in the bush and which is open radially inwards relative to the longitudinal axis,
• the retaining unit comprising a first bearing surface directed in the opening direction of the receiving space, for interacting with a first mating bearing surface of the bush directed opposite to the opening direction, and
• the retaining unit further comprising a second bearing surface directed opposite to the opening direction, which is intended to interact with a second mating bearing surface of the connecting piece directed in the opening direction,
• wherein the radially inwardly open circumferential groove in the bush is open in at least two circumferential portions towards an axial end face of the bush, and
• wherein the connecting piece comprises an annular flange, which may be brought into retaining engagement with the retaining unit.