Apparatus for compensating diagonal pull in cranes

Patent metadata

Field	Value
Publication number	US-11174134-B2
Application number	US-201716348321-A
Country	US
Kind code	B2
Filing date	Nov 9, 2017
Priority date	Nov 9, 2016
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

The invention relates to an apparatus for compensating diagonal pull in cranes having at least one boom, having a boom drive for adjusting an angle and/or a length of the boom and/or for traveling a trolley, and having a control/regulation apparatus for controlling/regulating the boom drive. The invention is further directed to a crane having a corresponding apparatus.

First claim

The invention claimed is:

1. A tower crane, comprising
a tower ( 1 );
a boom ( 2 ) mounted on the tower ( 1 ) to extend outwardly therefrom;
a boom drive ( 3 ) arranged for adjusting an angle of the boom ( 2 );
a sensor ( 5 ) arranged for detecting the angle of the boom ( 2 ); and
a control/regulation apparatus ( 4 ) arranged for controlling the boom drive ( 3 ),
wherein a detected sensor value is kept constant by the control/regulation apparatus ( 4 ) and the boom drive ( 3 ) on raising and/or placing down of a load ( 6 ) by the crane ( 1 ),
the sensor ( 5 ) is one of an inclinometer, an optical sensor, a length sensor for measuring deformation, a GPS sensor or a hoist rope sensor in or at a guying of the crane ( 1 ), and
the ratio of the sensor value or a reference value to outreach displacement due to the deformation of the crane ( 1 ), is scaled or determined using a test weight and/or determined by calculation.

2. The crane in accordance with claim 1 , wherein the boom drive ( 3 ) is at least a retraction winch ( 8 ) or a guying winch ( 9 ).

3. The crane in accordance with claim 1 , wherein the boom drive ( 3 ) is a hydraulic piston-cylinder apparatus.

4. The crane in accordance with claim 1 , wherein the control/regulation apparatus ( 4 ) controls the boom drive ( 3 ) on the basis of a reference value calculated from a plurality of different sensor values.

5. A tower crane, comprising
a tower ( 1 );
a boom ( 2 ) mounted on the tower ( 1 ) to extend outwardly therefrom;
a trolley ( 7 ) slidably mounted along the boom ( 2 );
a boom drive ( 3 ) arranged for traveling the trolley ( 7 );
a sensor ( 5 ) arranged for detecting a deformation of at least a part of the crane ( 1 ); and
a control/regulation apparatus ( 4 ) arranged for controlling the boom drive ( 3 ),
wherein a detected sensor value is kept constant by the control/regulation apparatus ( 4 ) and the boom drive ( 3 ) on raising and/or placing down of a load ( 6 ) by the crane ( 1 ),
the sensor ( 5 ) is one of an inclinometer, an optical sensor, a length sensor for measuring deformation, a GPS sensor or a hoist rope sensor in or at a guying of the crane ( 1 ), and
the ratio of the sensor value or a reference value to outreach displacement due to the deformation of the crane ( 1 ), is scaled or determined using a test weight and/or determined by calculation.

6. The crane in accordance with claim 5 , wherein the boom drive ( 3 ) is at least a retraction winch ( 8 ) or a guying winch ( 9 ).

7. The crane in accordance with claim 5 , wherein the boom drive ( 3 ) is a hydraulic piston-cylinder apparatus.

8. The crane in accordance with claim 5 , wherein the control/regulation apparatus ( 4 ) controls the boom drive ( 3 ) on the basis of a reference value calculated from a plurality of different sensor values.

9. The crane in accordance with claim 8 , wherein the reference value is a load torque calculated from outreach of the crane ( 1 ) and weight of the load ( 6 ).

Assignees

• Liebherr Werk Biberach Gmbh

Inventors

• Strähle Alexander

Classifications

• B66C23/88

  Safety gear (for cranes in general B66C15/00; for rope, cable, or chain winding mechanisms B66D1/54) · CPC title

• B66C13/08

  for depositing loads in desired attitudes or positions · CPC title

• B66C23/42

  with jibs of adjustable configuration, e.g. foldable · CPC title

• B66C13/20

  for non-electric drives (transmitting control pulses B66C13/40) · CPC title

• B66C23/905

  electrical · CPC title