Riveting device comprising a spring element of an integrated threaded spindle

A riveting device (1), comprising:

• a riveting tool (10), having
• a mouthpiece (11),
• a mandrel holder (12) that can be moved relative to the mouthpiece (11) along an operative axis (W), and
• a spring element (15) which exerts a force into the mandrel holder (12);
• and
• a drive device (30) for actuating the riveting tool (10) with
• a threaded spindle (33) having a feed thread (33.3),
• wherein the threaded spindle (33) receives the spring element (15),
• wherein the threaded spindle (33) is operatively connected to the mandrel holder (12) and configured to be moved along the operative axis (W),
• wherein the threaded spindle (33) has a front end (33.1) facing towards the mandrel holder (12) and an opposing back end (33.2),
• wherein the threaded spindle (33) is formed as a hollow spindle having a through hole (40),
• wherein the through hole (40) extends in a direction of a longitudinal extension of the threaded spindle (33),
• wherein the through hole (40) has a back longitudinal section (40.2) extending up to the opposing back end (33.2) of the threaded spindle (33) and a front longitudinal section (40.1) present in front of the back longitudinal section,
• wherein the threaded spindle (33) has a fixing structure (33.4) created by a material recess in a region of the front end (33.1),
• wherein the fixing structure (33.4) connects the threaded spindle (33) directly or indirectly to the mandrel holder (12),
• wherein the front longitudinal section (40.1) of the through hole (40) has a cross-sectional surface area which is smaller than a cross-sectional surface area of the back longitudinal section (40.2),
• wherein the spring element (15) is arranged in the back longitudinal section (40.2),
• wherein the threaded spindle (33) is engaged into a spindle nut (34) of a spindle gear (32) and in an initial state, present before actuating the riveting tool (10), the spring element (15) is arranged axially in the threaded spindle (33) in such a way that the spindle nut (34) and the spring element (15) overlap or an end of the spindle nut (34) facing towards the riveting tool (10) is in front of an end of the spring element (15) facing towards the riveting tool (10).