| 摘要 |
An expansion anchor for anchoring in a drilled hole in a substrate, including a bolt with a front end and a rear end opposite the front end, an expansion sleeve arranged on the bolt, an expansion cone pressing the expansion sleeve radially outward when the expansion cone is displaced in an extraction direction relative to the expansion sleeve, a counter bearing for axially pressing an attachment part to the substrate, and arranged in the region of the rear end of the bolt, and a spring element arranged on the bolt for axially tensioning the counter bearing against the attachment part. The axial spring force F of the spring element lies in the range from Fmin<Fmax where Fmin=dmax×0.2 kN/mm−0.8 kN Fmax=dmax×0.6 kN/mm if the spring element is axially slackened 0.4 mm to 0.8 mm from its maximum spring deflection. |
