Automatic erecting of a crane

Patent metadata

Field	Value
Publication number	US-10167176-B2
Application number	US-201514830604-A
Country	US
Kind code	B2
Filing date	Aug 19, 2015
Priority date	Aug 20, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

The present disclosure relates to a method for the automatic telescoping of the boom system of a crane, in particular of a mobile crane, having at least one telescopic boom, and having a rope and a winch for pivoting the boom. The method comprises measuring an actual value of the boom angle of the boom and actuating, in particular automatically, the winch in dependence on the measured boom angle.

First claim

The invention claimed is:

1. A method for automatic telescoping of a boom system of a crane having at least one telescopic boom, and having a rope and a winch for pivoting the boom, the method comprising:
measuring with a first sensor an actual value of a boom angle of the boom forming an acute angle relative to a horizontal plane;
actuating, automatically, the winch based on the measured boom angle;
measuring with a second sensor an actual value of a guying frame angle of a guying frame forming an acute angle relative to the horizontal plane;
determining, based on the measurements of the boom angle and the guying frame angle, an intermediate angle between the guying frame and the boom; and
actuating, automatically, the winch based on the intermediate angle between the guying frame and the boom, and wherein the crane is a mobile crane.

2. The method in accordance with claim 1 , wherein at least one desired value of the boom angle is predefined, and wherein the winch unwinds in an accelerated manner on the telescoping out of the boom if the actual value exceeds the desired value and the winch unwinds in a delayed manner on the telescoping out of the boom if the actual value falls below the desired value, or the winch winds up in a delayed manner on the telescoping in of the boom if the actual value exceeds the desired value and the winch winds up in an accelerated manner on the telescoping in of the boom if the actual value falls below the desired value.

3. The method in accordance with claim 1 , wherein at least one desired value of the intermediate angle is predefined and wherein the winch winds up on the telescoping if the actual value exceeds the desired value, the winch unwinds on the telescoping if the actual value falls below the desired value, and the winch is automatically actuated on a luffing of the boom.

4. The method in accordance with claim 1 , wherein one or more of: a hook height relative to ground, a luffing tip angle relative to the ground or relative to the boom, and a force carried by a guying and/or support is measured as an additional control parameter, and wherein the actuating of the winch is further adjusted based on the additional control parameter.

Assignees

• Liebherr Werk Ehingen

Inventors

• Willim Hans-Dieter
• Haebe Engelbert

Classifications

• B66C13/18 Primary

  Control systems or devices (exclusively for rope, cable, or chain winding mechanisms B66D1/40) · CPC title

• B66C23/04

  with jibs the effective length of which is variable in operation, e.g. longitudinally displaceable, extensible · CPC title

• B66C23/82

  Luffing gear · CPC title

• B66C13/22 Primary

  for electric drives (transmitting control pulses B66C13/40; systems or devices of general application H02P) · CPC title