Load weighing at the lifting hook

Patent metadata

Field	Value
Publication number	US-10358322-B2
Application number	US-201715630179-A
Country	US
Kind code	B2
Filing date	Jun 22, 2017
Priority date	Jun 23, 2016
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

The invention relates to an apparatus for weighing the hook load of a crane, wherein different measurement accuracies can be set at the apparatus, comprising at least one measurement device, at least one retaining pin, and at least one coupling section. The invention is additionally directed to a hook block and to a crane having a corresponding apparatus.

First claim

The invention claimed is:

1. An apparatus for weighing the hook load of a crane, wherein different measurement accuracies can be set at the apparatus, comprising
at least one measurement device ( 2 ), at least one retaining pin ( 3 ), and at least one coupling section ( 4 ),
the apparatus is provided between a boom and the hook ( 1 ) of a crane,
the retaining pin ( 3 ) and/or the measurement device ( 2 ) can be positioned at least at two different positions at the coupling section ( 4 ),
 the positions are horizontally spaced apart from one another, and
the measurement device ( 2 ) and the retaining pin ( 3 ) transmit the load of the hook ( 1 ) at least partially to the crane.

2. An apparatus in accordance with claim 1 , wherein the retaining pin ( 3 ) and/or the measurement device ( 2 ) is/are continuously adjustable between at least two positions.

3. An apparatus for weighing the hook load of a crane, wherein different measurement accuracies can be set at the apparatus, comprising
at least one measurement device ( 2 ), at least one retaining pin ( 3 ), and at least one coupling section ( 4 ),
the apparatus is provided between a boom and the hook ( 1 ) of a crane,
the retaining pin ( 3 ) and/or the measurement device ( 2 ) can be positioned at least at two different positions at the coupling section ( 4 ),
the positions are horizontally spaced apart from one another, and
at least two measurement devices ( 2 ) are provided positioned asymmetrically at the coupling section ( 4 ).

4. An apparatus in accordance with claim 1 , wherein the apparatus is provided at a hook block and/or coupled to the boom of the crane, to the roller set of the boom head.

5. An apparatus for weighing the hook load of a crane, wherein different measurement accuracies can be set at the apparatus, comprising
at least one measurement device ( 2 ), at least one retaining pin ( 3 ), and at least one coupling section ( 4 ),
the apparatus is provided between a boom and the hook ( 1 ) of a crane,
the retaining pin ( 3 ) and/or the measurement device ( 2 ) can be positioned at least at two different positions at the coupling section ( 4 ),
the positions are horizontally spaced apart from one another, and
the measurement device ( 2 ) is secured against overload by at least one pin.

6. An apparatus in accordance with claim 1 , wherein an energy supply is provided at the apparatus.

7. An apparatus in accordance with claim 1 , wherein the apparatus is adapted for a cable-less transmission of measurement signals between the measurement device ( 2 ) and a control unit.

8. A hook block or a boom head having at least one apparatus for load weighing in accordance with claim 1 .

9. A crane having at least one apparatus for load weighing in accordance with claim 1 .

Assignees

• Liebherr Werk Ehingen

Inventors

• Windbacher Stefan
• Wehrstedt Julian

Classifications

• G01G19/14

  for weighing suspended loads (G01G3/00 takes precedence; incorporation of weighing devices in cranes B66C1/40, B66C13/16) · CPC title

• B66C13/16

  Applications of indicating, registering, or weighing devices (in crane hooks B66C1/40; in safety gear B66C15/00; weighing-apparatus G01G; remote indicating in general G08) · CPC title

• B66C1/40 Primary

  formed or fitted with load measuring or indicating devices · CPC title

• B66C23/66

  Outer or upper end constructions · CPC title