Mobile crane

• US 10,343,876 B2
• Filed: 11/17/2016
• Issued: 07/09/2019
• Est. Priority Date: 06/13/2016
• Status: Active Grant

• Current Assignee: Liebherr-Werk Ehingen GmbH (Liebherr-International AG)
• Original Assignee: Liebherr-Werk Ehingen GmbH (Liebherr-International AG)
• Inventors: Kolb, Markus, Eberhardt, Lars
• Primary Examiner(s): Gallion, Michael E
• Application Number:
  US15/354,040
• Publication Number:
  US 20170355576A1
• Time in Patent Office: 964 Days
• CPC Class Codes: B66C 23/36 mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with pneumatic or hydraulic motors B66C23/54; vehicle or ship aspects B60 - B63
• CPC Class Codes: B66C 23/74 separate from jib
• CPC Class Codes: B66C 23/76 and movable to take account of variations of load or of variations of length of jib
• CPC Class Codes: B66C 2700/0342 on a turntable

Abstract

This invention relates to a mobile crane with a traveling undercarriage and an uppercarriage rotatably mounted on the same, to which on the one hand a boom is luffably articulated and on which on the other hand a counterweight assembly is arranged on the uppercarriage, in which a counterweight plate is connectable via a counterweight receptacle, in that the same is pivotable from a pick-up position into a deposited position about at least one bolt arranged on the counterweight receptacle. According to the invention, at least one further bolt is arranged on the counterweight receptacle parallel to the at least one bolt, which while swinging down the counterweight plate engages into a corresponding curve-shaped recess of the counterweight plate for securing the same.

Claims

1. A mobile crane with a traveling undercarriage and an uppercarriage rotatably mounted on which a boom is luffably articulated and on which a counterweight assembly is arranged on the uppercarriage, in which a counterweight plate is connectable via a counterweight receptacle, the counterweight plate being pivotable from a pick-up position into a deposited position about at least one first bolt arranged on the counterweight receptacle, wherein

on the counterweight receptacle, at least one further bolt is arranged parallel to the at least first one bolt, which while swinging the counterweight plate down, engages into and slides along a corresponding curve-shaped recess of the counterweight plate for securing the counterweight plate.

2. The mobile crane according to claim 1, wherein the counterweight receptacle consists of swivel arms pivotally arranged on the uppercarriage, which via swivel drives are steplessly pivotable from a maximally retracted into a maximally extended position.

3. The mobile crane according to claim 1, wherein further counterweight plates can be stacked onto the first counterweight plate swung in to form counterweight stacks.

4. The mobile crane according to claim 1, wherein on the counterweight receptacle, a connecting piece is arranged, on sides thereof the bolts each arranged parallel to each other are arranged opposite each other.

5. The mobile crane according to claim 4, wherein on the counterweight plate to be swung in parallel tabs are arranged, which are formed fork-shaped to form a pivot point and include the curve-shaped recess to receive the further bolt.

6. The mobile crane according to claim 1, wherein the curve-shaped recess is broader than the diameter of the bolt to be received.

7. The mobile crane according to claim 5, wherein the fork-shaped tabs are beveled on at least one side at their free ends.

8. The mobile crane according to claim 1, wherein a base plate to be swung in can be bolted to the counterweight receptacle by bolts on a side opposite the curve-shaped recess.

9. The mobile crane according to claim 8, wherein during disassembly of the mobile crane, the counterweight plate bolted to the counterweight receptacle can jointly be picked up via corresponding contact points.

10. The mobile crane according to claim 1, wherein the pivotable counterweight plate can be mounted on a sliding beam box of the undercarriage for transport during a road travel of the mobile crane.

11. The mobile crane according to claim 10, wherein the pivotable counterweight plate can be mounted on the undercarriage via preferably pluggable transport bolts for transport during the road travel of the mobile crane.