Mechanism for closing electrodes

A welding device comprises:a power source,a power transmission mechanism (41) transmitting the force of the power source, andat least two welding electrodes (24, 26) defining therebetween a welding gap (25), of which at least one electrode (26) is provided by a force provided by the power source by means of the power transmission mechanism (41) for changing the welding gap width in the direction ( K) is movable towards and away from the other electrode.According to the invention, the welding device (18) comprises at least one lever mechanism (41) as the power transmission mechanism (41), wherein the lever mechanism (41) comprises a first linkage system (42) which rotates about a frame pivot axis (68) at a pivot point (68) fixed relative to stationary device parts. G) is rotatable, and wherein the lever mechanism (41) further comprises a second link system (44) which at a first articulation point (70) on the first linkage system (42) rotatably articulated about a first axis of rotation (H) and at a second articulation point (72) is rotatably connected to the movable electrode (26) about a second rotation axis (7).