Back to results
US 11,999,601 B2Granted
Method for determining the rope reeving of a pulley block
AssigneeLiebherr-Werk Ehingen GmbH
InventorsStefan Windbacher, Julian Wehrstedt, Hans-Joachim Wenger
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a method for determining the number of rope reevings of a pulley block with a top block and a bottom block, wherein the rope path of at least one rope line of the pulley block, which is covered during a time window, is detected and compared with at least one rope path of a further rope line covered within the time window and/or with the height difference between top block and bottom block changed within the time window, in order to determine the number of rope reevings of the pulley block.
Claims15
A method comprising:
- providing a pulley block with a top block and a bottom block;
- and
- determining a number of rope reevings of the pulley block, wherein a rope path of a first rope line of the pulley block, which is covered during a time window, is detected, via sensors, and compared, via programming executed by a control unit, with at least one rope path of a further rope line of the pulley block covered within the time window and/or with a height difference between the top block and the bottom block changed within the time window, in order to determine the number of rope reevings of the pulley block, wherein each rope path corresponds to a length of rope let out or drawn in, wherein each rope path covered during the time window corresponds to the length of rope let out or pulled in during the time window, wherein the number of rope reevings in the pulley block is automatically determined using the sensors and the control unit during the time window in which the pulley block is actuated.
A system comprising:
- a pulley block with a top block and a bottom block;
- and
- a device including a measuring device and an evaluation unit, the device configured to carry out a method for determining a number of rope reevings of the pulley, wherein a rope path of a first rope line of the pulley block, which is covered during a time window, is detected, via sensors, and compared, via programming executed by a control unit, with at least one rope path of a further rope line of the pulley block covered within the time window and/or with a height difference between the top block and the bottom block changed within the time window, wherein the measuring device includes the sensors configured to detect the at least two rope paths during the time window, wherein the evaluation unit includes the control unit configured to calculate the rope reeving on the basis of measurement values, wherein each rope path corresponds to a length of rope let out or drawn in, wherein each rope path covered during the time window corresponds to the length of rope let out or pulled in during the time window, wherein the number of rope reevings in the pulley block is automatically determined using the control unit and the sensors during the time window in which the pulley block is actuated.
A crane comprising:
- a pulley block with a top block and a bottom block;
- and
- a control unit configured to communicate with at least two sensors for a rope path measurement on the pulley block, wherein the crane control unit is programmed to carry out a method for determining a number of rope reevings of the pulley block, wherein a rope path of a first rope line of the pulley block, which is covered during a time window, is detected, via the at least two sensors, and compared, via programming executed by the control unit, with at least one rope path of a further rope line of the pulley block covered within the time window and/or with a height difference between the top block and the bottom block changed within the time window, wherein each rope path corresponds to a length of rope let out or drawn in, wherein each rope path covered during the time window corresponds to a length of rope let out or pulled in during the time window, wherein the number of rope reevings in the pulley block is automatically determined using the control unit and the at least two sensors during the time window in which the pulley block is actuated.
Dependencies are inferred from the claim text.