公开(公告)号：US20210317638A1

公开(公告)日：2021-10-14

申请号：US17226303

申请日：2021-04-09

Applicant: Danfoss Power Solutions Inc.

Inventor： Erik Westergaard ,  Henrik Hauge

IPC: E02F9/22 ,  E02F9/20

Abstract: The invention relates to a method (19) of operating a hydraulic arrangement (1) including a mounting base (5), a boom (3) that is pivotably arranged on the mounting base (5), and a Z-kinematics (2) that is arranged on the boom (3). The Z-kinematics (2) tilts a tool attachment device (10), that is pivotably arranged on the boom (3). The boom (3) is moved by a lifting hydraulic piston (7) that is connected to the boom (3) and to the mounting base (5). The Z-kinematics (2) is moved by at least a tilting hydraulic piston (11) that is connected to a lever of the Z-kinematics (2) and to the mounting base (5). On application of an input control command for changing the position of the lifting hydraulic piston (7), a compensation command is automatically generated and applied to the tilting hydraulic piston (11), to essentially maintain the attitude of the tool attachment device (10). The compensation command is generated based on the input control command for the lifting hydraulic piston (7), using a mathematical model of the hydraulic arrangement (1).

公开(公告)号：US11136969B2

公开(公告)日：2021-10-05

申请号：US16792489

申请日：2020-02-17

Applicant: DANFOSS POWER SOLUTIONS INC.

Inventor： Stanislav Smolka ,  Jaromir Tvaruzek

IPC: F04B1/2085 ,  F16C19/50 ,  F16C33/30 ,  F16C33/58 ,  B33Y80/00

Abstract: A bearing assembly having an inner race, an outer race, and a plurality of rollers positioned between the inner race and the outer race. A pad is attached to the inner race and a bed is attached to the outer race. A timing mechanism is slidably mounted to the pad and the bed. Preferably the pad and bed are made of plastic and the inner race is embedded within the pad and the outer race is embedded within the bed.

公开(公告)号：US20210025140A1

公开(公告)日：2021-01-28

申请号：US16934116

申请日：2020-07-21

Applicant: DANFOSS POWER SOLUTIONS INC.

Inventor： Christian S. Daley

IPC: E02F9/22 ,  F15B13/044

Abstract: Automatic tilt command system of a hydraulically driven boom moveably connected with one end to a chassis of a working machine, wherein a tiltable tool is attachable to the other end. The system further comprises a first electronic control valve for controlling a fluid flow to and from a boom lift cylinder for moving of the boom and a second electronic control valve for controlling a fluid flow to and from a tilt cylinder for tilting the tool. A control unit receives input signals with regard to moving the boom and transmits based on the received input signals actuating signals to the first electronic control valve in order to move the boom. In parallel the control unit transmits tilting signals to the second electronic control valve which are based on a predetermined fluid flow ratio defined by the fluid flow for the boom movement and the fluid flow for tool levelling, so that the tool maintains its inclination angle with respect to the horizontal.

公开(公告)号：US20190170247A1

公开(公告)日：2019-06-06

申请号：US15833089

申请日：2017-12-06

Applicant: CNH Industrial America LLC ,  Danfoss Power Solutions Inc.

Inventor： David J. Hafvenstein ,  Simon L. Nielsen

IPC: F16H61/42 ,  F16H39/02 ,  F16H61/47

CPC classification number: F16H61/42 ,  A01C23/00 ,  A01M21/04 ,  B60Y2300/184 ,  F16H39/02 ,  F16H59/72 ,  F16H61/4192 ,  F16H61/47 ,  F16H2061/1216 ,  F16H2061/124

Abstract: A system, apparatus and method are provided for limiting operating speed at high temperatures of a self-propelled, agricultural product applicator having a hydraulic drive system including a pump supplying pressurized hydraulic fluid to a variable-displacement hydraulic motor operatively connected for propelling the applicator. A temperature sensor detects a temperature of the pressurized hydraulic fluid in the hydraulic system. A propel controller is operatively connected between the temperature sensor and the propulsion motor and configured for limiting displacement of the propulsion motor according to one or more predetermined de-rated conditions resulting in reduced motor speed, in accordance with a predetermined schedule, when predetermined motor de-rating activation temperature limits of the hydraulic fluid are detected by the temperature sensor. The controller is further configured for providing a de-rated condition warning signal prior to limiting displacement of the propulsion motor.

公开(公告)号：US10309390B2

公开(公告)日：2019-06-04

申请号：US14452112

申请日：2014-08-05

Applicant: Danfoss Power Solutions Inc.

Inventor： Peter Zavadinka ,  Stanislov Smolka ,  Pavol Sedo

IPC: F04B1/32 ,  F04B49/00 ,  F04B49/08 ,  F04B49/12

Abstract: Control device for hydraulic variable displacement pumps operated in an open hydraulic circuit and adjustable in their displacement volume by means of a servo control device. The control device comprises a control piston with two control edges to which pressure can be applied by means of pressurized pressure fluid from a variable displacement pump, the control piston being mounted in a housing so that it shifts longitudinally. The housing of the control piston comprises an inlet for the connection of a high pressure line of a variable displacement pump, an outlet which can be connected to a tank and a servo connection which can be linked to a servo cylinder, whereby a link between the inlet and the servo connection can be made via a first control edge. It is possible to create a link between the servo connection and the outlet via a second control edge.

公开(公告)号：US20180291797A1

公开(公告)日：2018-10-11

申请号：US15946880

申请日：2018-04-06

Applicant: DANFOSS POWER SOLUTIONS INC.

Inventor： Christian S. Daley ,  Nicholas Creager ,  Matt Dorenkamp ,  Eric R. Jacobson

IPC: F01P7/04 ,  F16H61/4148 ,  F04B49/00

CPC classification number: F16H61/4026 ,  F04B49/002 ,  F04B49/08 ,  F04B49/24 ,  F04B49/246 ,  F04B2205/16 ,  F15B2211/20507 ,  F16H61/4043 ,  F16H61/4052 ,  F16H61/4104 ,  F16H61/4139

Abstract: A hydraulic system that has a hydraulic pump connected to and in communication with a hydraulic motor, at least one hydraulic cylinder, or both by a first conduit and a second conduit (i.e., a high side and a low side). The hydraulic system has a bypass valve connected to and in communication with the first conduit and the second conduit. The bypass valve has a preset pressure that is above a minimum low side pressure. When a shock load occurs in the hydraulic system and a related drop in pressure on the low side occurs, the bypass valve opens when the preset pressure is passed thereby preventing the pressure from dropping to the minimum low side pressure. The hydraulic system thereby avoids a low loop event that could cause damage to the hydraulic system without the presence of larger charge pumps or accumulators.

公开(公告)号：US10066671B2

公开(公告)日：2018-09-04

申请号：US14884925

申请日：2015-10-16

Applicant: Danfoss Power Solutions, Inc.

Inventor： Stephen Frantz

IPC: F16C33/78 ,  F16C35/07 ,  F16C35/063 ,  F16C3/06 ,  F16C23/04 ,  F16C23/08 ,  F16C33/58 ,  F16C19/46 ,  F16C19/54

CPC classification number: F16C35/07 ,  F16C3/06 ,  F16C3/18 ,  F16C9/02 ,  F16C19/06 ,  F16C19/46 ,  F16C19/54 ,  F16C23/04 ,  F16C23/08 ,  F16C33/586 ,  F16C35/063

Abstract: A bearing arrangement includes a shaft with an outer circumferential supporting surface, and a mounting device with an inner circumferential supporting surface. The mounting device supports the shaft in a rotatable manner using a bearing structure. At least one tiltable sleeve member is arranged between at least one of the supporting surfaces and the bearing structure.

公开(公告)号：US09951771B2

公开(公告)日：2018-04-24

申请号：US14195226

申请日：2014-03-03

Applicant: DANFOSS POWER SOLUTIONS INC.

Inventor： Wallace K. Snead ,  Thomas G. Modica ,  Alfred J. Permann

IPC: F04C2/14 ,  F04C11/00 ,  F04C14/02 ,  F04C14/24 ,  F04B49/03 ,  F04C15/00 ,  F04C15/06

CPC classification number: F04C2/14 ,  F04B49/03 ,  F04C11/001 ,  F04C14/02 ,  F04C14/24 ,  F04C15/0057 ,  F04C15/06

Abstract: A selective flow hydraulic gear pump has an integral unit with a front pump section and a rear pump section. The front pump section has a pumping gear set, gear plate, and bearing plate housing. The rear pump section has a pumping gear set, gear plate, and cover housing. The integral unit has an inlet port common to both the bearing plate housing and the cover housing. Check valves and solenoid operated control valves are contained within the bearing plate housing and the cover housing and are associated with a first fluid conduit. A second fluid conduit is in communication with and extends between the bearing plate housing an outlet port in the cover housing.

公开(公告)号：US09879667B2

公开(公告)日：2018-01-30

申请号：US14633653

申请日：2015-02-27

Applicant: DANFOSS POWER SOLUTIONS INC.

Inventor： Abhijit Das

IPC: G06F17/11 ,  F04B49/06 ,  F04B1/26

CPC classification number: F04B49/065 ,  F04B1/26 ,  G06F17/11

Abstract: A variable load sense spring setting for an axial piston open circuit having three subsystems. A backstepping control applied to the first and second subsystems to determine an operator control input and a load sense spool effective open area control input that stabilize the first and second subsystems. The calculating a feasible load sense area from the third subsystem and the control inputs.

公开(公告)号：US09803660B1

公开(公告)日：2017-10-31

申请号：US14172171

申请日：2014-02-04

Applicant: DANFOSS POWER SOLUTIONS INC.

Inventor： Jeffrey C. Hansell ,  Joseph R. Wright

IPC: F04B1/29 ,  F15B13/00 ,  F04B1/32

CPC classification number: F15B13/00 ,  F04B1/2078 ,  F04B1/295 ,  F04B1/324

Abstract: A servo piston assembly having a servo piston body mounted within a servo piston cylinder. A pair of bushings are mounted within each end of the servo piston body. An elongated bore extends through the servo piston body and receives a guide rod that extends out of the servo piston body and is received within the servo piston cylinder.