CA2358309A1 - Drive system for a hydraulic excavator - Google Patents

Drive system for a hydraulic excavator Download PDF

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Publication number
CA2358309A1
CA2358309A1 CA002358309A CA2358309A CA2358309A1 CA 2358309 A1 CA2358309 A1 CA 2358309A1 CA 002358309 A CA002358309 A CA 002358309A CA 2358309 A CA2358309 A CA 2358309A CA 2358309 A1 CA2358309 A1 CA 2358309A1
Authority
CA
Canada
Prior art keywords
drive
electric motor
diesel engine
hydraulic pumps
coupling
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.)
Abandoned
Application number
CA002358309A
Other languages
French (fr)
Inventor
Gerd Ehrich
Joachim Meyer
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.)
Komatsu Mining Germany GmbH
Original Assignee
Komatsu Mining Germany GmbH
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
Priority claimed from DE10110514A external-priority patent/DE10110514A1/en
Application filed by Komatsu Mining Germany GmbH filed Critical Komatsu Mining Germany GmbH
Publication of CA2358309A1 publication Critical patent/CA2358309A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48Parallel type
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00Arrangement or mounting of electrical propulsion units
    • B60K1/02Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00Arrangement or mounting of transmissions in vehicles
    • B60K17/04Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/10Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Arrangement Of Transmissions (AREA)

Abstract

A drive for a hydraulic excavator having an electric motor as a main drive. In order to provide a compact, low-maintenance and reliable drive system, at least one diesel engine is arranged on the excavator vehicle itself and can be switched on as required and supplies the chassis with power independently of the main drive.

Description

BACKGROUND OF THE INVENTION
Diesel engines and electric motors are used for the drive of hydraulic excavators. In both cases, the installed power is converted into hydraulic power, which is preferably suited to transmission, control and safeguarding against overload.
The main arguments for the two drive systems are:
Electric motor: - high efficiency - high reliability - low maintenance effort this is therefore overall an economic drive.
Diesel engine: - great mobility of the excavator - the appliance can be moved easily and quickly in the mine.
For the main task of an excavator, to loosen and load material, an electric motor is the more economical drive. The diesel engine has its advantages only when moving (relocating) the excavator.
One known possible solution envisages arranging a diesel-hydraulic unit on a separate vehicle (trailer). This solution, also called a "power pack" has not become widespread. Coupling the various hydraulic lines is cumbersome, time-consuming and susceptible to faults.

SUMMARY OF THE INVENTION
The invention is based on the object of providing a compact, low-maintenance and reliable drive system which also ensures a high degree of mobility of the excavator.
Pursuant to this object, and others which will become apparent hereafter, one aspect of the present invention resides in a drive for a hydraulic excavator, which drive includes an electric motor as a main drive and at least one separate diesel engine arranged on the excavator so as to be startable as required. The diesel engine is operatively arranged to supply the chassis of the excavator with power independently of the main drive.
In another embodiment of the invention both the electric motor and the diesel engine, together with hydraulic pumps respectively associated with the electric motor and the diesel engine, form a separate drive unit.
In still another embodiment of the invention the electric motor is designed to have two shaft ends. A coupling is arranged to connect the second shaft end to the diesel engine so that the hydraulic pumps can be driven both by the electric motor and by the diesel engine connected to the electric motor via the second shaft end.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure.
For a better understanding of the invention, its operating advantages, and specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
2 BRIEF DESCRIPTION OF THE DRAWINGS
Fig 1 shows a drive unit with a separate diesel engine;
Fig 2 shows a drive unit with two diesel engines and through drive of the electric motors; and Fig 3 shows a drive unit with two separately connectable diesel engines.
3 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Large appliances are designed with two separate drives arranged in parallel.
The reasons for this are substantially that, in the case of the electrical design, a reduction in the starting current is to be achieved by starting up the two motors with a time delay.
Figure 1 shows a drive unit according to the invention with a separate diesel engine. Since the relevant large appliances are designed with two drive units and, in principle, only a lower power is needed for the driving operation as compared with the overall system, it is possible for a diesel-hydraulic unit, comprising a diesel engine 1, hydraulic pumps 2, a radiator 3 and a pump distributor gearbox 5, to be mounted transversely in front of the main drives, each comprising an electric motor 4, a pump distributor gearbox 5 and hydraulic pumps 2. The hydraulic pumps 2 are supplied with oil (hydraulic tank 7) via a separate suction tank 6.
The pressurized oil is fed into the control blocks of the main drive.
As Figure 2 shows, two diesel engines 1 can be connected via through drive of the electric motors 4.
Electric motors 4 with two shaft ends 8 are used. One shaft end drives the main pumps 2 via a pump distributor gearbox 5, as usual. Via the additional shaft end 8, virtually as a through drive, the additional diesel engine 1 is connected via a coupling 9.
The idea in this design is, therefore, when the electric motor 4 is switched off, to drive the hydraulic pumps 2 by means of the diesel engines 1, the respective electric motor 4 is used as a through drive.
The third variant according to Fig 3 envisages both the electric motors 4 and the diesel engines 1 being capable of being connected up to the drive of the hydraulic pumps 2 via
4 couplings 9 respectively associated with the diesel engines 1 and via the same pump distributor gearbox 5.
The coupling 9 illustrated can be a switching clutch and/or a hydrodynamic clutch.
In the case of mechanical coupling, before the changeover to diesel operation, the diesel engine would first have to be brought to approximately the rotational speed of the electric motor before a changeover was made. In the design as a hydrodynamic coupling, the diesel units can be started even when the electric motor is at a standstill.
In the exemplary embodiments, only two hydraulic pumps 2 for each pump distributor gearbox 5 are shown. There are usually at least three or up to six pumps.
The solutions proposed can also be used for an excavator having only one drive.
Thus, while there have been shown and described and pointed out fundamental novel features of the present invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the present invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Substitutions of elements from one described embodiment to another are also fully intended and contemplated. It is also to be understood that the drawings are not necessarily drawn to scale but that they are merely conceptual in nature. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.

Claims (9)

IN THE CLAIMS
1. A drive for a hydraulic excavator, comprising: an electric motor as a main drive; and least one separate diesel engine arranged on the excavator so as to be startable as required, the diesel engine being operatively arranged to supply a chassis of the excavator with power independently of the main drive.
2. A drive as defined in claim 1, and further comprising hydraulic pumps respectively associated with the electric motor and the diesel engine, both the electric motor and the diesel engine, together with the respectively associated hydraulic pumps, form a separate drive unit.
3 . A drive as defined in claim 1, wherein the electric motor has a first shaft end and a second shaft end, and further comprising hydraulic pumps associated with the electric motor, and a coupling arranged to connect the second shaft end to the diesel engine so that the hydraulic pumps can be driven both by the electric motor and by the diesel engine connected to the electric motor via the second shaft end.
4. A drive as defined in claim 1, and further comprising hydraulic pumps, the electric motor and also the diesel engine forming a drive for common hydraulic pumps in each case via a coupling.
5. A drive as defined in claim 3, wherein the coupling is a switching clutch.
6. A drive as defined in claim 4, wherein the coupling is a switching clutch.
7. A drive as defined in claim 3, wherein the coupling is a hydrodynamic clutch.
8. A drive as defined in claim 4, wherein the coupling is a hydrodynamic clutch.
9. A drive as defined in claim 2, and further comprising a pump distributor gearbox arranged between the hydraulic pumps and at least one of the electric motor and the diesel engine.
CA002358309A 2000-10-05 2001-10-04 Drive system for a hydraulic excavator Abandoned CA2358309A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10050837.5 2000-10-05
DE10050837 2000-10-05
DE10110514A DE10110514A1 (en) 2000-10-05 2001-02-28 Hydraulic excavator with main electric motor drive, includes separate diesel engines on excavator vehicle to supply energy to running gear
DE10110514.2 2001-02-28

Publications (1)

Publication Number Publication Date
CA2358309A1 true CA2358309A1 (en) 2002-04-05

Family

ID=26007354

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002358309A Abandoned CA2358309A1 (en) 2000-10-05 2001-10-04 Drive system for a hydraulic excavator

Country Status (3)

Country Link
US (1) US20020069561A1 (en)
AU (1) AU7736201A (en)
CA (1) CA2358309A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115653044A (en) * 2022-11-16 2023-01-31 徐州徐工挖掘机械有限公司 Power source switching hydraulic control system, control method and excavator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009001045U1 (en) * 2009-01-28 2010-07-22 Liebherr-Mischtechnik Gmbh Truck mixer
CN101962158A (en) * 2010-05-21 2011-02-02 许会忱 Double-power hydraulic steel grabber
CN103174531A (en) * 2013-03-20 2013-06-26 徐州徐工挖掘机械有限公司 Starting and flameout control system of diesel engine of excavator
DE102017121860A1 (en) * 2017-09-21 2019-03-21 Renk Aktiengesellschaft Dredge pump gearbox, suction dredger and method of operating a suction dredger

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4307522A (en) * 1979-03-21 1981-12-29 Colville Hume W Land Grading Machine
IT1219343B (en) * 1988-05-31 1990-05-11 Fiatgeotech SPEED CHANGE FOR A VEHICLE PARTICULARLY AN AGRICULTURAL TRACTOR
DE69825374T2 (en) * 1997-09-01 2005-07-21 Kanzaki Kokyukoki Mfg. Co., Ltd., Amagasaki Gear mechanism for a work vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115653044A (en) * 2022-11-16 2023-01-31 徐州徐工挖掘机械有限公司 Power source switching hydraulic control system, control method and excavator
CN115653044B (en) * 2022-11-16 2024-05-14 徐州徐工挖掘机械有限公司 Power source switching hydraulic control system, control method and excavator

Also Published As

Publication number Publication date
AU7736201A (en) 2002-04-11
US20020069561A1 (en) 2002-06-13

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Legal Events

Date Code Title Description
FZDE Discontinued