Abstract: A welding wire conveyor roller for conveying a welding wire includes a receiving aperture for receiving a receiving pin, and a running surface for the welding wire, and a feeding device for conveying a welding wire includes a drive motor, at least two receiving pins arranged at a distance to each other, and at least two welding wire conveyor rollers with running surfaces for the welding wire which are placed upon the receiving pins by appropriate receiving apertures. For achieving improved conveying properties even with different welding wires, an area elastically deformable in the radial direction is arranged between the running surface and the receiving aperture of the welding wire conveyor rollers.

Abstract: The invention relates to a connection device (27) comprising a coupling device (24) and a plug element (34) for a welding torch (10) connected to the coupling device (24) by at least one hose assembly (23), said coupling device arranged at least partially in the housing, wherein a welding wire (13), delivered by a feed unit (29) which is arranged on a motor plate (28), and additional media are conducted to the welding torch (10) via the hose assembly (23) and wherein the hose assembly (23) is connected to the plug element (34). In order to create such a connection system (27), the coupling device is formed by a connection device (30) comprising an end wall (38) and a separating wall (39) of the motor plate (28), wherein the end wall (38) is designed to receive the coupling (35), the connection device (30) is constructed to at least guide and position a pin (37), and the connection device (30) is independent of the housing.

Abstract: The invention relates to a connection device (27) comprising a coupling device (24) and a plug element (34) for a welding torch (10) connected to the coupling device (24) by at least one hose assembly (23), said coupling device arranged at least partially in the housing, wherein a welding wire (13), delivered by a feed unit (29) which is arranged on a motor plate (28), and additional media are conducted to the welding torch (10) via the hose assembly (23) and wherein the hose assembly (23) is connected to the plug element (34). In order to create such a connection system (27), the coupling device is formed by a connection device (30) comprising an end wall (38) and a separating wall (39) of the motor plate (28), wherein the end wall (38) is designed to receive the coupling (35), the connection device (30) is constructed to at least guide and position a pin (37), and the connection device (30) is independent of the housing.