Expansion anchor with spring element

An expansion anchor for anchoring in a drilled hole in a substrate, the expansion anchor comprising:

• a bolt having a front end and a rear end opposite the front end;
• an expansion sleeve situated on the bolt;
• an expansion cone situated in an area of the front end of the bolt and pushing the expansion sleeve radially outwardly when the expansion cone is offset in an extraction direction relative to the expansion sleeve;
• a counter bearing for axially pressing an attachment part against the substrate, the counter bearing being situated on the bolt in an area of the rear end of the bolt;
• and
• a spring element, situated on the bolt, for axially pretensioning the counter bearing against the attachment part, an axial spring force F of the spring element being in the range of
• Fmin<F<Fmax, where
• Fmin=dmax×0.2 kN/mm−0.8 kN and
• Fmax×0.6 kN/mm
• when the spring element is axially slackened 0.4 mm to 0.8 mm from its maximum spring deflection, dmax being a maximum diameter of the bolt between the expansion cone and the counter bearing.