EP3779209A1 - Groupe hydraulique monté sur un châssis destiné au fonctionnement d'un engin moteur autonome sur une surface de sol solide - Google Patents

Groupe hydraulique monté sur un châssis destiné au fonctionnement d'un engin moteur autonome sur une surface de sol solide Download PDF

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Publication number
EP3779209A1
EP3779209A1 EP19405013.4A EP19405013A EP3779209A1 EP 3779209 A1 EP3779209 A1 EP 3779209A1 EP 19405013 A EP19405013 A EP 19405013A EP 3779209 A1 EP3779209 A1 EP 3779209A1
Authority
EP
European Patent Office
Prior art keywords
container
hydraulic unit
unit according
liquid
hydraulic
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.)
Granted
Application number
EP19405013.4A
Other languages
German (de)
English (en)
Other versions
EP3779209B1 (fr
Inventor
Alexander ZIPES
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.)
Bucher Municipal AG
Original Assignee
Bucher Municipal AG
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 Bucher Municipal AG filed Critical Bucher Municipal AG
Priority to EP19405013.4A priority Critical patent/EP3779209B1/fr
Priority to ES19405013T priority patent/ES2958107T3/es
Publication of EP3779209A1 publication Critical patent/EP3779209A1/fr
Application granted granted Critical
Publication of EP3779209B1 publication Critical patent/EP3779209B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07513—Details concerning the chassis
    • B66F9/07518—Fuel or oil tank arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07572—Propulsion arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • F04B23/028—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir the pump being mounted on top of the reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/005—Filling or draining of fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0423—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/048—Arrangements for compressed air preparation, e.g. comprising air driers, air condensers, filters, lubricators or pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/62—Cooling or heating means

Definitions

  • the invention relates to a hydraulic unit built on a chassis for the operation of a self-propelled machine on a solid floor surface using pumped hydraulic fluid as a power transmission means, consisting of a fluid tank provided for receiving the hydraulic fluid and at least one for withdrawing the hydraulic fluid and returning the hydraulic fluid to the hydraulic fluid via a fluid return line
  • the motor-pump unit is attached directly to the tank via a tank opening
  • the return filter which has an elongated filter housing for a filter element with a filter cartridge, is inserted into a tank opening intended for it in the tank and has a hose connection and an outlet opening
  • the filter element is arranged in the flow path between the hose connection and the outlet opening, and a return hose, the motor-pump unit and the hose connection inside the tank.
  • liquid tanks formed from metal, primarily from structural steel by welding, with built-up feed pumps, valve blocks and filters as well as a filler neck as hydraulic units.
  • a built-up hydraulic unit with a sheet metal tank made of structural steel is relatively heavy and, in the case of complex chassis and body shapes, such as those formed in a vehicle outer contour, for example in the wheel arch area, is very expensive to manufacture.
  • a welded liquid tank is prone to corrosion, especially after damage to the surface, and tensions in the area of the weld seams lead to leaks.
  • a plastic tank has a significant disadvantage when integrating built-on aggregation components such as motors, pumps and valve combinations, especially since the required fastening structures, for example insert frames, can only be implemented in narrow dimensions due to the different expansion coefficients of metal and plastic, because temperature fluctuations lead to a reduction in stability and a loss of rigidity , lead to leaks between the insert frame and the plastic tank and weaken the existing strength.
  • the object was achieved in that the liquid tank is formed from a container open at the top and the feed pump and the switching valve arrangement connected to it, the connecting lines of the unit components and a liquid filling opening are arranged as a unit on a closure plate closing the container opening.
  • the assembly components can already be assembled and function-tested after pre-assembly on the closure plate and then installed together on the closure plate of the liquid tank in the container or removed from it individually or together for maintenance and / or repair.
  • the hydraulic fluid that flows back into the fluid tank after use is returned via a fluid return line preferably provided with a return filter at the end. Due to the necessary favorable accessibility, an outer wall of the container can form a supplementary part of the vehicle structure (body part) of the work machine.
  • the closing plate which also serves as a cover for the container, is preferably made of a metallic material, preferably structural steel, for example sheet steel or the like, and provides a large-area, torsion-resistant connection with the liquid container for high stability of the hydraulic unit on the chassis of a work machine.
  • Connecting end of the container to the closure plate is formed by a fastening device provided for sealing between the container and the closure plate
  • the unit-forming feed pump (s), the switching valve arrangement, the liquid filter protruding into the liquid tank, the connecting lines and screw connections and other fittings as well as a liquid filler neck, which are part of the aggregate components, are advantageously attached to the closure plate and thus facilitate assembly and disassembly as a unit the maintenance work and controls.
  • the container is preferably designed in one piece, but also fulfills its function and task in this regard in a two-piece design.
  • the container can also be made of plastic in another process, which proves to be a durable material and resistant to corrosion and in impact situations.
  • the liquid filling opening is preferably formed by a filling and venting filter which protrudes into the liquid-free space of the liquid tank and is attached to the underside of the closure plate.
  • the container is expediently box-like and equipped with a container end shaped like a section of a wheel housing of the mobile work machine, so that it can be attached to the chassis in a space-saving and weight-saving manner and is easily accessible from the outside.
  • a filling and venting filter is preferably arranged in the liquid tank above a certain liquid level so that it can optimally develop its effect.
  • the container constriction is formed by at least one flow threshold which distinguishes / subdivides the liquid tank into a container spaces assigned to the liquid backflow and the liquid suction through which a laminar mixture of the returned and the static hydraulic fluid is achieved.
  • the flow threshold (s) can be provided on a rear wall of a cavity offset in the container and thus promote a heat equalization effect.
  • a suction opening of the suction line connected to the feed pump (s) is advantageously arranged in the container space with a lower liquid temperature than in the other container space of the liquid tank.
  • Fig. 1 shows a three-dimensionally illustrated hydraulic unit 2 built on a chassis of a self-propelled machine 1 for generating a work force / - performance by means of a circulating hydraulic fluid.
  • the hydraulic unit 2 consists of a container 3 provided for receiving the hydraulic fluid, preferably made of plastic, for example made of fiber-crosslinked polyethylene, polyamide or similar material, which is cheaper and more cost-effective in a rotational molding or injection molding process, advantageously in more complex forms that come closer to the purpose can be produced with lower weight and appropriate rigidity compared to a tank made of welded steel sheets.
  • At least one feed pump 11, 12 is provided which is arranged inside the fluid tank and which is screwed onto a preferably flat closure plate 6 that is fastened to form the upper opening of the container 3, forming a closed fluid tank 5.
  • This serves to position and fasten the actuators or components of the hydraulic unit 2 as a device unit and can be placed on the container edge 7 determining the upper opening of the container 3 and the liquid tank 5 can be tightly fastened.
  • screws 8 or comparable similar fastening elements are provided, which are anchored at the end of the container edge 7.
  • the feed pumps 11, 12, it could also be ones that are driven jointly by an electric motor 9, are screwed to the top of the closure plate 6 via a fastening flange provided on the electric motor and protrude into the liquid tank 5 in a suspended manner (see FIG Fig. 2 ).
  • Fig. 1 and 2 a switching valve arrangement 13 attached to the closure plate 6 for controlling the hydraulic fluid, respectively. of the aggregate components, and opposite, laterally offset to the electric motor of the feed pumps 11, 12 a filling and venting filter 14 projecting into the liquid tank 5 and designed for filling the latter, and a service cover 15, respectively.
  • the closure plate 6 which is made of a metallic material, for example structural steel, offers a high degree of rigidity over the extent of the plate and, together with the container 3, exerts robust stability and rigidity on the liquid tank 5. In terms of manufacturing technology, the closure plate does not make any high demands.
  • the flat expansion / extension of the closure plate 6 allows a simple design and arrangement of the assembly components, the structure of which can be designed and implemented on the closure plate 6 with simple machine elements and work equipment.
  • the shape of the closure plate 6 is suitable for a tight connection with the container 3 on the container edge 7.
  • the assembly components can easily be detached / removed from the locking plate 6 for maintenance and repair or replacement.
  • the container 3 is made in one piece, preferably manufactured with plastic according to the rotational molding or an injection molding process.
  • the present invention does not exclude the use of a container 3 made of sheet steel.
  • the container 3 is box-shaped so that it can be fitted on / in the chassis 16 of the self-propelled work machine and is easily accessible in a space-saving manner.
  • the container 3 of the liquid tank 5 is in the immediate vicinity of a wheel house 17 of a rigid or a steerable front or rear axle of the mobile work machine 1, based on the geometry of the wheel house shape, respectively. concentric to the wheel axis ( Fig., 2 ).
  • the assembly components 11, 12, 13, 14, 15 and the fluid lines of the system can be individually removed from the closure plate 6, be it for maintenance, repair or replacement.
  • the return filter 20 preferably belongs to the equipment of the hydraulic unit 2 and is attached to the closure plate 6 so as to protrude into the liquid tank 5, the liquid return line 18, preferably at its end opening into the liquid tank 5, with an outlet opening, for example below the liquid level 19, is formed.
  • Illustrated service cover (flange) 15 for the exchange or maintenance of the return filter 20 is located above a non-visible filler opening, the is usually extended by a filler neck protruding into the liquid tank 5.
  • the liquid tank 5 is divided into two unseparated container spaces 22, 23 by a constriction provided in the container 3 by means of a threshold arrangement 21.
  • a lower wall part of the rear container wall 24 is offset towards the front wall 25 of the container 3 and extends to a level below the unit components or the liquid level 19, and thus forms a cavity 26.
  • the side walls 27, 28 and roof elements 29, 30 arranged like a roof complete the cavity 26, on the rear side of which, container wall part 24, a pair of laterally spaced, strip-like flow bumps 31, 32 protruding against the front container wall 25 are arranged.
  • Fig. 2 additionally provides the routing of the hydraulic fluid between the assembly components and the consumers, not shown.
  • the suction line 34 already mentioned carries the hydraulic fluid by means of feed pumps 11, 12 separated by the pressure lines 36, 37 via the controllable switching valve arrangement 13 to the consumer or working devices of the machine 1 and from there via the switching valve arrangement 13 and liquid return line 18 and liquid filter 14 into the container space 22, respectively. the liquid tank 5.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
EP19405013.4A 2019-08-16 2019-08-16 Engin moteur autonome sur une surface de sol solide avec un groupe hydraulique monté sur un châssis Active EP3779209B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19405013.4A EP3779209B1 (fr) 2019-08-16 2019-08-16 Engin moteur autonome sur une surface de sol solide avec un groupe hydraulique monté sur un châssis
ES19405013T ES2958107T3 (es) 2019-08-16 2019-08-16 Máquina de trabajo autopropulsada sobre una superficie de suelo firme, con un grupo hidráulico montado sobre un bastidor para accionar la máquina de trabajo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19405013.4A EP3779209B1 (fr) 2019-08-16 2019-08-16 Engin moteur autonome sur une surface de sol solide avec un groupe hydraulique monté sur un châssis

Publications (2)

Publication Number Publication Date
EP3779209A1 true EP3779209A1 (fr) 2021-02-17
EP3779209B1 EP3779209B1 (fr) 2023-09-20

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EP19405013.4A Active EP3779209B1 (fr) 2019-08-16 2019-08-16 Engin moteur autonome sur une surface de sol solide avec un groupe hydraulique monté sur un châssis

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Country Link
EP (1) EP3779209B1 (fr)
ES (1) ES2958107T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220282718A1 (en) * 2021-03-08 2022-09-08 J.C. Bamford Excavators Limited Hydraulic pump system
EP4306724A1 (fr) 2022-07-15 2024-01-17 Yanmar Holdings Co., Ltd. Machine de travail électrique
EP4403512A1 (fr) * 2023-01-17 2024-07-24 Hyster-Yale Group, Inc. Module de bloc d'alimentation hydraulique

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999013229A1 (fr) * 1997-09-09 1999-03-18 Mannesmann Rexroth Ag Groupe hydraulique
US6116454A (en) * 1998-10-01 2000-09-12 Caterpillar Inc. Hydraulic oil tank with integral baffle
DE102004032256B3 (de) 2004-07-03 2005-12-15 Jungheinrich Ag Hydraulikaggregat für Flurförderzeuge
WO2009156017A1 (fr) * 2008-06-27 2009-12-30 Hydac Fluidtechnik Gmbh Unité hydraulique
WO2017005338A1 (fr) * 2015-07-08 2017-01-12 Hydac Fluidtechnik Gmbh Groupe hydraulique
DE102016101662A1 (de) * 2016-01-29 2017-08-03 Schwäbische Hüttenwerke Automotive GmbH Strömungsleitung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999013229A1 (fr) * 1997-09-09 1999-03-18 Mannesmann Rexroth Ag Groupe hydraulique
US6116454A (en) * 1998-10-01 2000-09-12 Caterpillar Inc. Hydraulic oil tank with integral baffle
DE102004032256B3 (de) 2004-07-03 2005-12-15 Jungheinrich Ag Hydraulikaggregat für Flurförderzeuge
WO2009156017A1 (fr) * 2008-06-27 2009-12-30 Hydac Fluidtechnik Gmbh Unité hydraulique
WO2017005338A1 (fr) * 2015-07-08 2017-01-12 Hydac Fluidtechnik Gmbh Groupe hydraulique
DE102016101662A1 (de) * 2016-01-29 2017-08-03 Schwäbische Hüttenwerke Automotive GmbH Strömungsleitung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220282718A1 (en) * 2021-03-08 2022-09-08 J.C. Bamford Excavators Limited Hydraulic pump system
EP4306724A1 (fr) 2022-07-15 2024-01-17 Yanmar Holdings Co., Ltd. Machine de travail électrique
EP4403512A1 (fr) * 2023-01-17 2024-07-24 Hyster-Yale Group, Inc. Module de bloc d'alimentation hydraulique

Also Published As

Publication number Publication date
ES2958107T3 (es) 2024-02-01
EP3779209B1 (fr) 2023-09-20

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