Insert for a sandwich component having a honeycomb core
View Patent ↗An insert ( 10 ) for a sandwich component ( 30 ) having a honeycomb core ( 31 ) has an inner hollow-cylindrical sleeve ( 12 ). To improve the force-transmitting ability between the insert ( 10 ) and the sandwich component ( 30 ), the insert ( 10 ) further has an outer sleeve ( 16 ) which is connected to the inner sleeve ( 12 ) by means of a plurality of radial webs ( 18 ) forming a plurality of axial chambers ( 20 ). Introduction of a push-in part ( 32 ) into the chambers ( 20 ), cause the anchor elements to exit, with their pointed end ( 24 ) in front, through exit openings ( 28 ) radially out of the chambers ( 20 ).
1. Insert ( 10 ) for a sandwich component having a honeycomb core, having:
an inner hollow-cylindrical sleeve ( 12 ),
an outer sleeve ( 16 ) which is arranged concentrically and with radial spacing with respect to the inner sleeve ( 12 ) and the inner side of which is connected to the outer side of the inner sleeve ( 12 ) by means of a plurality of radial webs ( 18 ),
a plurality of axial chambers ( 20 ), distributed over the circumference of the inset, between the inner sleeve ( 12 ) and the outer sleeve ( 16 ), each chamber ( 20 ) being bounded in the circumferential direction of the insert by two webs ( 18 ) following each other in the circumferential direction, and being open at least on one of its end sides,
a plurality of anchor elements ( 22 ), in each case one of which is received in an associated chamber ( 20 ), each anchor element ( 22 ) having a pointed end ( 24 ) and a blunt end ( 26 ) and the blunt end being adjacent to the open end side of the chamber ( 20 ),
a plurality of exit openings ( 28 ) in the lateral surface of the outer sleeve ( 16 ), through which a part of each anchor element ( 22 ) can exit, with its pointed end ( 24 ) in front, from the associated chamber ( 20 ),
a push-in part ( 32 ) which can be introduced axially through the open end sides of the chambers ( 20 ) into the latter and is designed such that, upon introduction into the chambers ( 20 ), it comes into contact with the blunt ends ( 26 ) of the anchor elements ( 22 ) and displaces the latter, and
guiding devices in each changer ( 20 ) containing an anchor element ( 22 ), which devices, upon a displacement of the anchor elements ( 22 ) brought about by the introduction of the push-in part ( 32 ) into the chambers ( 20 ), cause the anchor elements to exit, with their pointed end ( 24 ) in front, through the exit openings ( 28 ) radially out of the chambers ( 20 ).
2. Insert according to claim 1 , characterised in that at east three anchor elements ( 22 ) are arranged in a manner distributed over the circumference of the insert.
3. Insert according to claim 1 , characterised in that each anchor element ( 22 ) is received substantially vertically in the associated chamber ( 20 ) and, after the exiting through the associated exit opening ( 28 ) brought about by its displacement, assumes a substantially horizontal, position.
4. Insert according to claim 1 , characterised in that each anchor element ( 22 ) has an arrowhead-like shape with a rectangular cross-section.
5. Insert according to claim 1 , characterised in that the anchor elements ( 22 ) are hollow.
6. Insert according to claim 1 , characterised in that the guiding devices in each chamber ( 20 ) containing an anchor element ( 22 ) comprise guiding ribs ( 38 ) which project into the chamber ( 20 ) from the webs ( 18 ) laterally bounding the chamber ( 20 ) and extend axially.
7. Insert according to claim 6 , characterised in that the guiding ribs ( 38 ) extend axially as far as into the region of the exit openings ( 28 ), but do not span the latter completely.
8. Insert according to claim 6 , characterised in that the guiding ribs ( 38 ) interact with guiding grooves ( 40 ) formed on the respective anchor element ( 22 ).
9. Insert according to claim 8 , characterised in that the guiding grooves ( 40 ) of each anchor element ( 22 ) have sufficient play with respect to the guiding ribs ( 38 ) to enable, during the displacement of the anchor elements ( 22 ) brought about by the introduction of the push-in part ( 32 ) into the chambers ( 20 ), a rotation of each anchor element ( 22 ) from its substantially vertical position in the direction of the horizontal position.
10. Insert according to claim 7 , characterised in that the guiding devices in each chamber ( 20 ) containing an anchor element ( 22 ) further have a ramp ( 46 ) which is arranged, in the region of the exit openings ( 28 ) which is not spanned by the guiding ribs ( 38 ), in such a way that the anchor element ( 22 ) in a final phase of its displacement comes into sliding contact with the ramp ( 46 ) and in so doing is displaced radially outwards.
11. Insert according to claim 10 , characterised in that the ramps ( 46 ) are attached to the outer side of the inner hollow-cylindrical sleeve ( 12 ).
12. Insert according to claim 1 , characterised in that part of the guiding devices in each chamber ( 20 ) containing an anchor element ( 22 ) is a stop ( 44 ) which is arranged at the axial end, opposite the pointed end ( 24 ) of the anchor element ( 22 ), of the associated exit opening ( 28 ) and guides the pointed end ( 24 ) of the anchor element ( 22 ), in the initial phase of its displacement, out through the associated exit opening ( 28 ).
13. Insert according to claim 12 , characterised in that the stop ( 44 ), in the final phase of the displacement of the anchor element ( 22 ), fixes the horizontal end position of the anchor element ( 22 ).
14. Insert according to claim 1 , characterised in that the push-in part ( 32 ) has, in a cover ( 34 ) closing the chambers ( 20 ), injection openings ( 48 ) which are in communication with the chambers ( 20 ).