Tower crane
AssigneeLiebherr-Werk Biberach GmbH
InventorJochen Samulski
Life of this patent
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Abstract
The invention relates to a tower crane, preferably a rotary tower crane, particularly preferably a top-slewing crane, comprising a jib and a counter-jib. The jib and/or counter-jib is hinged to the tower top and/or rotating platform by means of at least one connection point. A first connection part of the at least one connection point has a concave stop surface, and a second connection part of the connection point comprises a convex counter-stop surface, wherein the counter-stop surface of the second connection part acts on the stop surface of the first connection part by means of a pressure force in order to produce a force-fitting connection between the connection parts.
Claims16
A tower crane, having a boom and a counterboom, wherein
- at least one of the boom and counterboom is connected in an articulated manner to at least one of a tower tip and a slewing platform by at least one connection point,
- a first connection part of the at least one connection point has a concave abutment surface and a second connection part of the connection point comprises a convex counter-abutment surface, with the counter-abutment surface of the second connection part acting by compressive force on the abutment surface of the first connection part,
- the second connection part comprises a connection head having a defined radius as the counter-abutment surface,
- the first connection part is configured as a connection socket having an inner radius adapted to the radius of the connection head as the abutment surface, and
- said concave abutment surface and convex counter-abutment surface are configured to contact one another and fit and be secured together by movement of said second connection part only along a common axis orthogonal to a vertical direction,
- wherein said head of said second connection part extends from an end face thereof having said convex counter-abutment surface with a positive radius of curvature dimensioned smaller than a negative radius of curvature of said concave abutment surface of said first connection part.
A tower crane, having a boom and a counterboom, wherein
- at least one of the boom and counterboom is connected in an articulated manner to at least one of a tower tip and a slewing platform by at least one connection point,
- a first connection part of the at least one connection point has a concave abutment surface and a second connection part of the connection point comprises a convex counter-abutment surface, with the counter-abutment surface of the second connection part acting by compressive force on the abutment surface of the first connection part,
- the second connection part comprises a connection head having a defined radius as a counter-abutment surface,
- the first connection part is configured as a connection socket having an inner radius adapted to the radius of the connection head as the abutment surface,
- said first connection part additionally comprises side metal sheets on opposite sides thereof, and
- said side metal sheets each having a bore for receiving a pin therethrough, being substantially parallel with one another, projecting beyond an upper edge of said first connection part, and comprising edge regions angled outwardly to form a receiving funnel for the second connection part.
Dependencies are inferred from the claim text.