EP4101993A1 - Verbesserte hydraulische anordnung zur energierückgewinnung von hydraulischen systemen in arbeitsfahrzeugen - Google Patents

Verbesserte hydraulische anordnung zur energierückgewinnung von hydraulischen systemen in arbeitsfahrzeugen Download PDF

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Publication number
EP4101993A1
EP4101993A1 EP22177413.6A EP22177413A EP4101993A1 EP 4101993 A1 EP4101993 A1 EP 4101993A1 EP 22177413 A EP22177413 A EP 22177413A EP 4101993 A1 EP4101993 A1 EP 4101993A1
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EP
European Patent Office
Prior art keywords
hydraulic assembly
controller
hydraulic
accumulator
extension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22177413.6A
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English (en)
French (fr)
Inventor
Francesco CHIOCCOLA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNH Industrial Italia SpA
Original Assignee
CNH Industrial Italia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CNH Industrial Italia SpA filed Critical CNH Industrial Italia SpA
Publication of EP4101993A1 publication Critical patent/EP4101993A1/de
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0883—Tanks, e.g. oil tank, urea tank, fuel tank
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/18—Counterweights

Definitions

  • the present invention concerns a hydraulic assembly, in particular for providing an energy recovery functionality in a work vehicle.
  • the present invention finds its preferred, although not exclusive, application in vehicles provided by a hydraulic actuated boom.
  • Work vehicles such as scrapers, i.e. vehicles provided with a hydraulic actuated boom, may be provided with so-called energy recovery systems.
  • Energy recovery systems are configured to reduce the energy consumption during the movement of a boom that is controlled via a hydraulic actuator. Indeed, when the boom is controlled to be lowered, the fluid discharged by hydraulic actuator is stored to be used then the boom is controlled to be lifted.
  • Such systems foresees the presence of accumulators to allow the storing of the fluid discharged by the actuator and a control block configured to manage the fluid flow between the accumulators and the actuator.
  • the accumulators and the control block needs a storing space that is not negligible on work machines.
  • the presence of the accumulators increases the weight of the work vehicle thereby increasing its fuel consumption and partially waster the results achievable thanks to the energy recovery system.
  • An aim of the present invention is to satisfy the above mentioned needs in a cost effective and optimized manner.
  • Figure 1 discloses a work vehicle 1, e.g. a scraper, provided with a body 2 that is carried by an undercarriage 3 that is movable on the ground thanks to traction means 4, e.g. crawlers.
  • a work vehicle e.g. a scraper
  • body 2 that is carried by an undercarriage 3 that is movable on the ground thanks to traction means 4, e.g. crawlers.
  • the work vehicle 1 comprises advantageously a boom 5 configured to be operated by hydraulic actuators 6 controlled by a related hydraulic circuit (not shown for sake of clarity) on the base of a control provided by a user of the vehicle 1.
  • the vehicle 1 is provided with an energy recovery system that is hydraulically coupled to the hydraulic actuators 6 for providing an energy recovery functionality.
  • the work vehicle 1 further comprises a hydraulic assembly 7 that is configured to be carried by the body 2.
  • the hydraulic assembly 7 may be advantageously arranged within a housing 8 having a parallelepiped shape and configured to define a space to house the elements described hereunder.
  • the hydraulic assembly 7 has a compact dimension, suitable for being substituted to tanks already existing on work vehicles for storing the hydraulic oil for allowing the operation of all hydraulic circuits of the vehicle.
  • the hydraulic assembly 7 has a width, X, a height, Y, and a thickness, Z that are dimensioned so that about 30-40% of the total volume of the oil of the work vehicle 1 may be stored in the tank and the 70-60% of the volume of the oil is contained in the hydraulic circuits of the work vehicle 1.
  • width X, height Y and thickness Z are referred to three axis perpendicular one with respect to the other, i.e. according to a Cartesian reference.
  • the hydraulic assembly 7 comprises part of the energy recovery system, i.e. at least an accumulator 10, and a controller 12, and a tank 11 that are all fluidly connected together and preferably arranged within the housing 8.
  • the tank 11 is configured to allow to store the drain oil of all the hydraulic circuits of the work vehicle 1.
  • the tank 11 has a height and a weight that occupy the entire respective space of the hydraulic assembly 7 while the thickness of the tank is part, in the peculiar disclosed examples the half, of the available thickness of the hydraulic assembly 7.
  • the hydraulic assembly 7 comprises a tank 11, a controller 12 and three accumulators 10.
  • the tank 11 extends all over the eight and the width of the hydraulic assembly 7 and the half of the thickness of the hydraulic assembly 7.
  • the controller 12 extends along the entire width of the hydraulic assembly 7 and occupies the remaining part of the thickness of this latter.
  • the three accumulators 10 are housed vertically above the controller 12 and extends, each, for the remaining part of the height of the hydraulic assembly 7.
  • the three accumulators 10 are housed one adjacent with the other in the width direction and are preferably realized as cylinders. On the thickness direction they are in contact with tank 11.
  • the hydraulic assembly 7 comprises a tank 11, a controller 12 and three accumulators 10.
  • the tank 11 extends all over the eight and the width of the hydraulic assembly 7 and the half of the thickness of the hydraulic assembly 7.
  • the controller 12 extends along only part of the width of the hydraulic assembly 7 and occupies the remaining part of the thickness of this latter.
  • the three accumulators 10 are housed one adjacent with the other in the width direction and are preferably realized as cylinders. On the thickness direction they are in contact with tank 11. On the vertical direction, the two of the accumulators 10 extends over the controller 12 to occupy the remaining vertical possible extension while a third accumulator extends all other the vertical extension of the hydraulic assembly 7 and is adjacent to the controller 12. In particular, in width, such third accumulator occupies the space not occupied by the controller 12.
  • the hydraulic assembly 7 comprises a tank 11, a controller 12 and two accumulators 10.
  • the tank 11 extends all over the eight and the width of the hydraulic assembly 7 and the half of the thickness of the hydraulic assembly 7.
  • the controller 12 extends along only part of the width of the hydraulic assembly 7 and occupies all the vertical extension of the latter.
  • the three accumulators 10 are housed one adjacent with the other in the width direction and are preferably realized as cylinders. Both the accumulator 12 vertically extends along all the vertical extension of the hydraulic assembly 7. According to the preceding, one of the two accumulators 10 is adjacent to controller 12 and in width direction the two accumulators 10 occupies all the space remaining from the controller 12.
  • the hydraulic assembly 7 comprises a tank 11, a controller 12 and two accumulators 10.
  • the tank 11 extends all over the eight and the width of the hydraulic assembly 7 and the half of the thickness of the hydraulic assembly 7.
  • the controller 12 extends along the entire width of the hydraulic assembly 7 and occupies the remaining part of the thickness of this latter.
  • the two accumulators 10 are housed vertically above the controller 12 and extends, each, for the entire width of the hydraulic assembly 7 and vertically adjacent one above the other.
  • the two accumulators 10 are preferably realized as cylinders and, on the thickness direction they are in contact with tank 11.
  • the at least one accumulator 10 (exemplarily disclosed three accumulators 10) are fluidly connected to the controller 12, to the tank 11 and to the hydraulic actuator 6.
  • the controller 12 comprises a charging module 12a and a balancing module 12b fluidly connected between the charging module 12a, the hydraulic actuator 6, the tank 11 and the accumulators 10.
  • the charging module 12a and the balancing module 12b are configured to regulate the fluid passage between accumulators 10, tank 11 and actuator 6 and may be realized according to different hydraulic schematics in function of the dimensions of the work vehicle 1.
  • the hydraulic assembly 7 may further comprise an electronic control unit, ECU, of the vehicle housed together with the controller 12.
  • ECU electronice control unit
  • the tank 11 solves to its function of reservoir of a sufficient quantity of oil to allow the operation of all the hydraulic circuits of the vehicle 1.
  • the proposed hydraulic assembly 7 provides in a single compact space both the tank 11 of the vehicle and the energy recovery systems, i.e. accumulators 10 and controller 12.
  • the dimensions of the tank 11 have been optimized to reduce the quantity of stored oil till the minimum to guarantee the operation, in any condition, of the work vehicle and such space reduction has been used to house the accumulators and the controller of the energy recovery system.
  • tank 11 is about 50% in volume smaller than existing tanks.
  • the hydraulic assembly 7 does not need to occupies other space in the vehicle and may be provided also in existing vehicles as a kit.
  • hydraulic assembly 7 may be easily mounted, therefore reducing industrialization costs and allows an easy maintain in the field since all components are easily accessible.
  • hydraulic assembly 7 may be housed instead of existing tanks, no modification on the general layout or design of existing machines is needed.
  • accumulators 11 are placed between the tank and bonnets of the vehicle and may be covered by a housing 8, the driver is protected from the latter.
  • the accumulators 10 may be placed in different orientation with respect to the tank 11. Similar consideration may be applied to controller 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Fluid-Pressure Circuits (AREA)
EP22177413.6A 2021-06-08 2022-06-06 Verbesserte hydraulische anordnung zur energierückgewinnung von hydraulischen systemen in arbeitsfahrzeugen Pending EP4101993A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000014852A IT202100014852A1 (it) 2021-06-08 2021-06-08 Assieme idraulico migliorato per sistemi di recupero d'energia idraulica in veicoli da lavoro

Publications (1)

Publication Number Publication Date
EP4101993A1 true EP4101993A1 (de) 2022-12-14

Family

ID=77412250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22177413.6A Pending EP4101993A1 (de) 2021-06-08 2022-06-06 Verbesserte hydraulische anordnung zur energierückgewinnung von hydraulischen systemen in arbeitsfahrzeugen

Country Status (2)

Country Link
EP (1) EP4101993A1 (de)
IT (1) IT202100014852A1 (de)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000054435A (ja) * 1998-08-03 2000-02-22 Hitachi Constr Mach Co Ltd 建設機械のカウンタウエイト装置
US20060138860A1 (en) * 2002-09-27 2006-06-29 Axel Hinz Hydraulic unit for anti-slip braking systems
JP2008150945A (ja) * 2006-02-07 2008-07-03 Takeuchi Seisakusho:Kk 作業車
CN102943496A (zh) 2012-12-03 2013-02-27 柳工常州挖掘机有限公司 挖掘机动臂势能循环利用系统
CN104328818A (zh) * 2014-10-28 2015-02-04 广西玉柴重工有限公司 一种磷酸铁锂电池式电动挖掘机
US10167612B2 (en) 2013-09-18 2019-01-01 Caterpillar Sarl Counterweight device for arranging accumulators inside the counterweight of a working machine
EP3447197A1 (de) * 2016-04-20 2019-02-27 Hitachi Construction Machinery Tierra Co., Ltd. Kompakte hydraulikschaufel
EP3460128A1 (de) * 2016-10-26 2019-03-27 Kubota Corporation Bodenmatte und arbeitsmaschine
KR20200085543A (ko) * 2019-01-07 2020-07-15 (주)세진중공업 해양플랜트의 탑사이드용 통합 유틸리티 모듈
US20200256032A1 (en) * 2018-03-29 2020-08-13 Hitachi Construction Machinery Tierra Co., Ltd. Hydraulic Excavator

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000054435A (ja) * 1998-08-03 2000-02-22 Hitachi Constr Mach Co Ltd 建設機械のカウンタウエイト装置
US20060138860A1 (en) * 2002-09-27 2006-06-29 Axel Hinz Hydraulic unit for anti-slip braking systems
JP2008150945A (ja) * 2006-02-07 2008-07-03 Takeuchi Seisakusho:Kk 作業車
CN102943496A (zh) 2012-12-03 2013-02-27 柳工常州挖掘机有限公司 挖掘机动臂势能循环利用系统
US10167612B2 (en) 2013-09-18 2019-01-01 Caterpillar Sarl Counterweight device for arranging accumulators inside the counterweight of a working machine
CN104328818A (zh) * 2014-10-28 2015-02-04 广西玉柴重工有限公司 一种磷酸铁锂电池式电动挖掘机
EP3447197A1 (de) * 2016-04-20 2019-02-27 Hitachi Construction Machinery Tierra Co., Ltd. Kompakte hydraulikschaufel
EP3460128A1 (de) * 2016-10-26 2019-03-27 Kubota Corporation Bodenmatte und arbeitsmaschine
US20200256032A1 (en) * 2018-03-29 2020-08-13 Hitachi Construction Machinery Tierra Co., Ltd. Hydraulic Excavator
KR20200085543A (ko) * 2019-01-07 2020-07-15 (주)세진중공업 해양플랜트의 탑사이드용 통합 유틸리티 모듈

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