Device for determining the actual state and/or the remaining service life of a construction, materials-handling and/or conveyor machine

Patent metadata

Field	Value
Publication number	US-12559918-B2
Application number	US-202117449226-A
Country	US
Kind code	B2
Filing date	Sep 28, 2021
Priority date	Mar 29, 2019
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The invention relates to a device for determining the actual state and/or the remaining service life of a construction, materials-handling and/or conveyor machine, having a plurality of sensors provided on the construction, materials-handling and/or conveyor machine for recording various state information, a recording unit connected to the sensors for gathering the recorded state information, a central unit able to be connected to the recording unit for evaluating the gathered state information and determining the actual state and/or the remaining service life from the gathered state information, and a display device for displaying the determined actual state and/or the determined remaining service life, wherein the sensors comprise various sensor types for recording at least two different categories of information from the group comprising component oscillations, lubricant properties, component and/or lubricant temperature and drive loading and the central unit is designed to ascertain the actual state and/or the remaining service life on the basis of the at least two different categories of information.

First claim

We claim:

1 . A device for determining the actual state and/or the remaining service life of a construction, materials-handling and/or conveyor machine, the device comprising:
a plurality of sensors on the construction, materials-handling and/or conveyor machine for recording various state information, wherein the plurality of sensors are integrated in an interior of a transmission of the construction, materials-handling and/or conveyor machine, wherein the plurality of sensors comprises various sensor types for recording at least two different categories of information from the group comprising component oscillations, lubricant properties, component and/or lubricant temperature and drive loading, wherein the plurality of sensors comprises an oscillation sensor for detecting component oscillations and at least one of the following sensors: an oil particle sensor, an oil viscosity sensor, an oil conductivity sensor for detecting transmission oil particles and/or transmission oil condition, a recording unit connected to the plurality of sensors for gathering recorded state information, a central unit connectable to the recording unit for evaluating gathered state information and for determining the actual state and/or the remaining service life from the gathered state information, wherein the actual state and/or the remaining service life is determinable by the central unit based on the at least two different categories of information, and a display device for displaying the actual state determined by the central unit and/or the remaining service life determined by the central unit, wherein the display device is provided on the construction, materials-handling and/or conveyor machine and is configured to display gathered state information and the actual state and/or the remaining service life to a control station, wherein the display device is configured to be touch-sensitive as a touch screen, wherein the display device comprises a control device of the control station such that upon touching an area of the display device in which a specific machine component of the construction, materials-handling and/or conveyor machine is displayed, the control device is configured to reconfigure the display device, wherein the central unit comprises a weighting device for differentially weighting different gathered state information and/or different information derived therefrom, wherein the actual state and/or the remaining service life is determinable by the central unit based on weightings of the different gathered state information and/or the different information derived therefrom, wherein the weighting device is configured to give a different weighting to an oscillation signal of the oscillation sensor and/or an oscillation characteristic value derived therefrom than to a temperature value of a temperature sensor and/or a temperature characteristic value derived therefrom, and/or is configured to give a different weighting to speed and/or torque information of a speed and/or torque sensor and/or a speed and/or torque characteristic value derived therefrom than to oil condition information of the oil particle sensor, wherein if a recorded state information item exceeds a predetermined threshold value, but all other state information items are below their respective threshold values, the central unit regards the exceeding of the predetermined threshold value as unproblematic, and if three recorded state information items are beyond their respective threshold values, a maintenance signal is triggerable via the central unit.

2 . The device of claim 1 , wherein the plurality of sensors further comprises at least one of the following sensors: the speed and/or torque sensor, the temperature sensor, an oil condition sensor, a force sensor, an oil level sensor, a dielectricity sensor and a moisture sensor.

3 . The device of claim 1 , wherein the plurality of sensors are enclosed by a housing of the transmission.

4 . The device of claim 1 , wherein the plurality of sensors are jointly powered by the recording unit.

5 . The device of claim 1 , wherein the central unit is configured to take into account all state information of the following sensors: the speed and/or torque sensor, the oscillation sensor, an oil temperature sensor, the oil particle sensor, the oil viscosity sensor, the oil conductivity sensor, a force sensor, an oil level sensor, a dielectricity sensor and a moisture sensor.

6 . The device of claim 1 , wherein the plurality of sensors further comprises at least one of the following sensors: a torque and/or a rotational speed sensor, an oil temperature sensor, a force sensor, an oil level sensor, a dielectricity sensor and a moisture sensor, and
wherein the actual state and/or the remaining service life of the construction, materials-handling and/or conveyor machine and/or of the transmission is determinable by the central unit based on at least two items of information from the group comprising transmission rotational speed and/or torque, oscillations, transmission oil temperature, transmission oil particles and oil condition.

7 . The device of claim 1 , wherein the transmission is a slewing transmission for slewing a revolving stage of the construction, materials-handling and/or conveyor machine relative to an undercarriage of the construction, materials-handling and/or conveyor machine, or wherein the transmission is a travel drive transmission for driving a travel drive or a wheel drive.

8 . The device of claim 1 , wherein the recording unit comprises a data processing module for pre-compressing and/or classifying the gathered state information and is configured to transmit pre-compressed and/or classified state information to the central unit.

9 . The device of claim 8 , wherein the recording unit comprises an oscillation analysis module for analyzing the state information of the oscillation sensor and for determining oscillation spectra and/or characteristic oscillation values, and
wherein the actual state and/or the remaining service life is determinable by the central unit based on determined oscillation spectra and/or determined characteristic oscillation values transmitted from the recording unit.

10 . The device of claim 1 , wherein the recording unit comprises a linking and/or accounting module for linking and/or accounting for the gathered state information, and wherein the linking and/or accounting module is configured to:
determine temperature differences from gathered temperature values of a temperature sensor, and/or calculate a transmission and/or drive power from speed and/or torque values of the speed and/or torque sensor, and/or calculate an output or input torque from a torque value of a torque sensor using gear ratio information and an efficiency map.

11 . The device of claim 1 , wherein the recording unit has a power supply input connected to the construction, materials-handling and/or conveyor machine and a power supply output connected to the plurality of sensors.

12 . The device of claim 1 , wherein the central unit comprises an analysis module for analyzing the gathered state information and for analyzing pre-processed state information transmitted by the recording unit.

13 . The device of claim 12 , wherein the analysis module is configured to determine the actual state and/or the remaining service life of a transmission of the construction, materials-handling and/or conveyor machine based on oscillation spectra transmitted by the recording unit and/or characteristic oscillation values and/or temperature differences transmitted by the recording unit and/or power values determined by the recording unit

Assignees

• Liebherr Components Biberach Gmbh

Inventors

• Mupende Yvon Ilaka
• Parlow Jan

Classifications

• G07C5/0825

  using optical means · CPC title

• G07C5/008

  communicating information to a remotely located station (transmission systems for measured values G08C) · CPC title

• G07C5/006 Primary

  Indicating maintenance · CPC title

• F16N2250/08

  Temperature · CPC title

• F16N2210/04

  Vehicles · CPC title