公开(公告)号：US20220251804A1

公开(公告)日：2022-08-11

申请号：US17620131

申请日：2020-06-25

Applicant: LIEBHERR-WERK BISCHOFSHOFEN GMBH

Inventor： Hans KNAPP ,  Josef STOCK ,  Rupert GAPPMAIER ,  Christoph KIEGERL ,  Reinhard WINDHOFER ,  Florian ALTENBERGER

IPC: E02F9/22 ,  F15B11/04

Abstract: The present invention relates to a mobile work machine, in particular to a wheeled loader, having a hydraulic circuit, having a pump for conveying a hydraulic medium through the hydraulic circuit, and having at least one control block having an inflow control edge and an outflow control edge for controlling the flow of the hydraulic medium, wherein the work machine has a working tool and a cylinder for actuating the working tool and wherein the cylinder has an outflow and in inflow for the hydraulic medium, and wherein the outflow is in fluid communication with the outflow control edge and the inflow is in fluid communication with the inflow control edge, and wherein the inflow control edge does not have any or has fewer fine control notches than the outflow control edge and thus works in a largely unrestricted manner, while the outflow control edge is equipped with one or more fine control notches so that with a pulling load at the working tool, the outflow control edge restricts the outflow amount through the outflow of the cylinder.

公开(公告)号：US20240416992A1

公开(公告)日：2024-12-19

申请号：US18742950

申请日：2024-06-13

Applicant: Liebherr-Werk Bischofshofen GmbH

Inventor： Florian ALTENBERGER ,  Marco EDER ,  Johannes HOFBAUER ,  Josef STOCK ,  Reinhard WINDHOFER

IPC: B62D5/07 ,  B60T7/12 ,  B60T13/14 ,  B60T13/74 ,  B60T17/22 ,  B62D5/06 ,  F15B1/04 ,  F15B15/18 ,  H02K7/14

Abstract: The present disclosure relates to a hydraulic pump assembly comprising: a variable displacement pump, preferably a load-sensing variable displacement pump, for outputting a volume flow rate of a hydraulic fluid, an electric motor for driving the variable displacement pump, in particular a swashplate or swivel angle pump, via a variable-speed drive shaft, and a control unit which is connected to the variable displacement pump and the electric motor and is configured to provide a predetermined volume flow rate by controlling the variable displacement pump and the electric motor. The hydraulic pump assembly is characterized in that the pump assembly further comprises a temperature sensor connected to the control unit, which senses a winding temperature of the electric motor, wherein as long as the winding temperature is below a threshold, the control unit is configured to provide the predetermined volume flow rate.

公开(公告)号：US20230059952A1

公开(公告)日：2023-02-23

申请号：US17889659

申请日：2022-08-17

Applicant: Liebherr-Werk Bischofshofen GmbH

Inventor： Hans KNAPP ,  Hendrik RICHTER ,  Christoph KIEGERL ,  Reinhard WINDHOFER ,  Johannes HOFBAUER

IPC: B60K11/02 ,  B60L1/00 ,  E02F9/08 ,  H02K9/193 ,  H02K9/26

Abstract: The present invention relates to a work machine, in particular a wheeled loader, having an electric motor and having oil cooling that is suitable and intended to cool the electric motor and having a driving axle that has an oil reservoir, wherein a feed line from said oil reservoir to the electric motor and a discharge line from the electric motor to said oil reservoir are present and a pump is present to pump oil from the oil reservoir to the electric motor so that the electric motor is cooled by means of oil from the oil reservoir of the driving axle.