JP2002354764A - Electro-hydraulic drive unit - Google Patents

Electro-hydraulic drive unit

Info

Publication number
JP2002354764A
JP2002354764A JP2002066859A JP2002066859A JP2002354764A JP 2002354764 A JP2002354764 A JP 2002354764A JP 2002066859 A JP2002066859 A JP 2002066859A JP 2002066859 A JP2002066859 A JP 2002066859A JP 2002354764 A JP2002354764 A JP 2002354764A
Authority
JP
Japan
Prior art keywords
electric motor
hydraulic
drive unit
pump
electro
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
JP2002066859A
Other languages
Japanese (ja)
Other versions
JP4099337B2 (en
Inventor
Franz Forster
フォルスター フランツ
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.)
Linde GmbH
Original Assignee
Linde 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
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of JP2002354764A publication Critical patent/JP2002354764A/en
Application granted granted Critical
Publication of JP4099337B2 publication Critical patent/JP4099337B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/062—Details, component parts
    • B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
    • 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
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0096—Heating; Cooling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a drive unit having an enlarged utilization region. SOLUTION: In an electro-hydraulic drive unit that is of a type provided with an electric motor and a hydraulic pump driven thereby, at least another one electric motor 2 is installed in an electric motor 1, while this electric motor 2 is driven-connected with at least another one hydraulic pump 5.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電気液圧式の駆動
ユニットであって、電動モータと該電動モータによって
駆動される液圧式のポンプとが設けられている形式のも
のに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electro-hydraulic drive unit having an electric motor and a hydraulic pump driven by the electric motor.

【０００２】[0002]

【従来の技術】このような形式の駆動ユニットは例えば
フロア搬送装置（Flurfoerderzeug）において使用され
る。2. Description of the Related Art A drive unit of this type is used, for example, in a floor transport device (Flurfoerderzeug).

【０００３】[0003]

【発明が解決しようとする課題】本発明の課題は、冒頭
に述べた形式の駆動ユニットを改良して、拡大された使
用領域を有する駆動ユニットを提供することである。SUMMARY OF THE INVENTION It is an object of the present invention to improve a drive unit of the type described at the outset and to provide a drive unit with an increased area of use.

【０００４】[0004]

【課題を解決するための手段】この課題を解決するため
に本発明の構成では、電動モータ内に少なくとも１つの
別の電動モータが組み込まれていて、該別の電動モータ
が、少なくとも１つの別の液圧式のポンプと駆動結合さ
れているようにした。In order to solve this problem, according to the present invention, at least one other electric motor is incorporated in the electric motor, and the other electric motor includes at least one other electric motor. And a hydraulic pump.

【０００５】[0005]

【発明の効果】本発明による駆動ユニットは、互いに無
関係なつまり独立した少なくとも２つの搬送流を有して
おり、これらの搬送流は異なった消費機に供給すること
ができる。そして所属の液圧回路においては異なった圧
力が可能である。The drive unit according to the invention has at least two transport streams which are independent of each other, i.e. independent, which can be supplied to different consumers. Different pressures are possible in the associated hydraulic circuit.

【０００６】本発明の有利な構成では、第１及び／又は
第２の液圧式のポンプが少なくとも部分的に、第１及び
／又は第２の電動モータ内に組み込まれている。In an advantageous embodiment of the invention, the first and / or the second hydraulic pump is at least partially integrated in the first and / or the second electric motor.

【０００７】またこの場合、両液圧式のポンプが側部に
おける１つの閉鎖カバー内に配置されていると、特に有
利である。In this case, it is particularly advantageous if the two hydraulic pumps are arranged in one closing cover on the side.

【０００８】本発明の別の有利な構成では、両ポンプが
互いに平行につまり並列的に配置されていて、第１のポ
ンプが、第１の電動モータに結合された中空のポンプ軸
を有しており、該ポンプ軸内に第２のポンプの、第２の
電動モータと結合されたポンプ軸が配置されている。In a further advantageous embodiment of the invention, the two pumps are arranged parallel to one another, that is to say in parallel, the first pump having a hollow pump shaft connected to the first electric motor. The pump shaft of the second pump, which is coupled to the second electric motor, is arranged in the pump shaft.

【０００９】ポンプは有利には歯車ポンプ、特に環状歯
車ポンプ（Zahnringpumpe）として形成されている。The pump is preferably designed as a gear pump, in particular a ring gear pump.

【００１０】本発明の別の構成では、両ポンプが１つの
共通の吸込み通路を有している。In another embodiment of the invention, both pumps have one common suction passage.

【００１１】また、第１の電動モータが、外側に位置す
るステータと内側に位置するロータとを有しており、ロ
ータが中空軸を有していて、該中空軸内に第２の電動モ
ータが位置していると、第２の電動モータの配置形式に
有利である。Also, the first electric motor has an outer stator and an inner rotor, and the rotor has a hollow shaft, and the second electric motor is provided in the hollow shaft. Is advantageous for the arrangement type of the second electric motor.

【００１２】電動モータがオイル冷却されるように構成
されていると、本発明による駆動ユニットの高い出力密
度及び僅かな騒音発生に関して有利である。If the electric motor is designed to be oil-cooled, it is advantageous with respect to the high power density and low noise of the drive unit according to the invention.

【００１３】この場合本発明の有利な構成では、半径方
向で見て第１の電動モータの中空軸と第２の電動モータ
のケーシングとの間に、冷却通路が形成されており、該
冷却通路が入口開口及び出口開口に接続されていて、入
口開口及び出口開口が液圧回路と接続されている。In an advantageous embodiment of the invention, a cooling passage is formed between the hollow shaft of the first electric motor and the casing of the second electric motor when viewed in the radial direction. Are connected to the inlet opening and the outlet opening, and the inlet opening and the outlet opening are connected to the hydraulic circuit.

【００１４】また、入口開口が、液圧式の消費機の戻し
導管と接続されていて、該消費機がポンプのうちの１つ
に接続されており、出口開口がポンプの吸込み通路と接
続されていると、有利である。Also, an inlet opening is connected to the return conduit of the hydraulic consumer, which is connected to one of the pumps, and an outlet opening is connected to the suction passage of the pump. Is advantageous.

【００１５】本発明の別の構成では、第１のポンプが第
２のポンプに比べて大きな吐出量を有している。このよ
うな構成は、所要量が互いに強く異なっている消費機の
ために、特に適している。In another configuration of the present invention, the first pump has a larger discharge rate than the second pump. Such an arrangement is particularly suitable for consumers whose requirements differ strongly from one another.

【００１６】この場合、両方のポンプを１つの作業液圧
装置の異なった消費機のために使用することが可能であ
る。本発明の別の有利な構成では、第１のポンプが作業
液圧装置に、かつ第２のポンプが、走行可能な作業機械
のステアリング液圧装置に接続されている。このように
構成されていると、ステアリング液圧装置に常に十分な
圧力オイルを供給することが保証される。１つの電動モ
ータと１つのポンプとだけを備えた従来技術の駆動ユニ
ットにおいて使用される特別な優先弁（Prioritaetsven
til）は、この場合不要である。In this case, it is possible to use both pumps for different consumers of one working hydraulic device. In another advantageous embodiment of the invention, the first pump is connected to the working hydraulic device and the second pump is connected to the steering hydraulic device of the mobile work machine. With this configuration, it is ensured that a sufficient pressure oil is always supplied to the steering hydraulic device. Special priority valves (Prioritaetsven) used in prior art drive units with only one electric motor and one pump
til) is not needed in this case.

【００１７】本発明による駆動ユニットは、作業機械が
フロア搬送装置として形成されている作業機械ために、
特に良好に適しており、この場合作業液圧装置は昇降・
傾斜シリンダを有している。A drive unit according to the invention is provided for a working machine in which the working machine is formed as a floor conveyor.
It is particularly well suited, in which case the working hydraulics
It has a tilt cylinder.

【００１８】このような構成において両方のポンプが作
業液体を供給するために使用される場合、例えば吐出量
の大きなポンプを行程・傾斜液圧装置に接続し、これに
対して小型のポンプを例えばサイドスライダ（Seitensc
hieber）への供給のために用いることができる。When both pumps are used to supply working liquid in such a configuration, for example, a pump with a large discharge rate is connected to a stroke / inclination hydraulic device, while a small pump is used, for example. Side slider (Seitensc
hieber).

【００１９】本発明のさらに別の構成では、電動モータ
が三相交流モータとして形成されている。三相交流は保
守が要らず、かつ簡単にエネルギの回収を可能にする。
例えばフォークリフトにおいて本発明を使用する場合に
は、行程シリンダの降下時に所属の第１のポンプが駆動
され、この際にこれに連結された第１の電動モータがジ
ェネレータとして作用させられることによって、行程エ
ネルギを回収することができる。In a further embodiment of the invention, the electric motor is formed as a three-phase AC motor. Three-phase alternating current requires no maintenance and allows easy energy recovery.
For example, when the present invention is used in a forklift, when the stroke cylinder descends, the associated first pump is driven, and the first electric motor connected to the first pump is operated as a generator. Energy can be recovered.

【００２０】[0020]

【発明の実施の形態】次に図面を参照しながら本発明の
実施の形態を説明する。Embodiments of the present invention will now be described with reference to the drawings.

【００２１】本発明による駆動ユニットはダブルポンプ
ユニットとして形成されており、これは例えばフォーク
リフトにおいて使用することができる。The drive unit according to the invention is designed as a double pump unit, which can be used, for example, in a forklift.

【００２２】第１の電動モータ１の半径方向内側に第２
の電動モータ２が配置されている。この第２の電動モー
タ２は、第１の電動モータ１の内側に位置するロータの
中空軸３内に位置している。The second electric motor 1 is provided with a second
Of electric motors 2 are arranged. The second electric motor 2 is located in a hollow shaft 3 of a rotor located inside the first electric motor 1.

【００２３】両電動モータ１，２は２つのポンプ４，５
を駆動し、両ポンプ４，５は図示の実施例では歯車ポン
プ（環状歯車ポンプ）として形成されていて、駆動ユニ
ットの側部の閉鎖カバー６内に互いに平行に配置されて
いる。この場合第１のポンプ４は軸方向及び半径方向に
おいて完全に駆動ユニット内に組み込まれている。The two electric motors 1 and 2 comprise two pumps 4 and 5
The two pumps 4, 5 are formed in the embodiment shown as gear pumps (annular gear pumps) and are arranged parallel to one another in a closing cover 6 on the side of the drive unit. In this case, the first pump 4 is completely integrated axially and radially in the drive unit.

【００２４】第２のポンプ５は図示の実施例では閉鎖カ
バー６の側部切欠き内に位置しており、つまり軸方向に
おいては駆動ユニット内に完全には組み込まれていな
い。もちろん第２のポンプ５を同様に完全に組み込むこ
と及び閉鎖カバー６を一平面を成すように平らに形成す
ることも、同様に可能である。In the embodiment shown, the second pump 5 is located in a side cutout of the closure cover 6, that is to say it is not completely integrated in the drive unit in the axial direction. Of course, it is likewise possible for the second pump 5 to be completely integrated and for the closure cover 6 to be formed flat so as to form a plane.

【００２５】第１のポンプ４は第１の電動モータ１の中
空軸３と駆動結合されていて、中空のポンプ軸４ａを有
している。第１のポンプ４の中空のポンプ軸４ａ内に
は、第２のポンプ５のポンプ軸５ｂが配置されており、
このポンプ軸５ｂは第２の電動モータ２によって駆動さ
れる。The first pump 4 is drivingly connected to the hollow shaft 3 of the first electric motor 1 and has a hollow pump shaft 4a. Inside the hollow pump shaft 4a of the first pump 4, the pump shaft 5b of the second pump 5 is arranged,
The pump shaft 5b is driven by the second electric motor 2.

【００２６】電動モータ１と中空のポンプ軸４ａとの間
における駆動結合装置は円板７から成っており、この円
板７は第１の電動モータ１の中空軸３と結合されてい
て、転がり軸受８を用いて閉鎖カバー６に支承されてい
る。The drive coupling device between the electric motor 1 and the hollow pump shaft 4a consists of a disk 7, which is connected to the hollow shaft 3 of the first electric motor 1 and rolls. It is supported on the closing cover 6 by means of a bearing 8.

【００２７】第２の電動モータ２は回転する円板７に支
持されているので、第２の電動モータ２の、駆動ユニッ
トの閉鎖カバー６に隣接した軸受シールド９と、円板７
との間には、転がり軸受１０が設けられている。電動モ
ータ２の反対の側に配置された軸受シールド１１は、駆
動ユニットの、図１で見て右側の閉鎖カバー１２と堅固
に結合されている。Since the second electric motor 2 is supported by the rotating disk 7, the bearing shield 9 of the second electric motor 2 adjacent to the closing cover 6 of the drive unit and the disk 7
A rolling bearing 10 is provided between the two. A bearing shield 11 arranged on the opposite side of the electric motor 2 is rigidly connected to a closing cover 12 of the drive unit on the right side as viewed in FIG.

【００２８】両方のポンプ４，５は１つの共通の吸込み
通路１３と、互いに隔てられた２つの圧力通路１４，１
５を有している。第１のポンプ４は、第２のポンプ５よ
りも大きな吐出量を有しており、例えばフォークリフト
の昇降液圧装置の昇降・傾斜シリンダのような作業液圧
装置に接続されている。第２のポンプ５は有利には、液
圧式のステアリング装置又は別の二次消費機へ液圧媒体
を供給するために働く。The two pumps 4, 5 have one common suction passage 13 and two pressure passages 14, 1 separated from one another.
Five. The first pump 4 has a larger discharge rate than the second pump 5, and is connected to a working hydraulic device such as a lifting / lowering / tilting cylinder of a lifting / lowering hydraulic device of a forklift. The second pump 5 advantageously serves to supply hydraulic medium to a hydraulic steering device or another secondary consumer.

【００２９】半径方向で見て、第１の電動モータ１の中
空軸３と第２の電動モータ２のケーシング１６との間に
は、リング円筒形の冷却通路１７が形成されており、こ
の冷却通路１７は、両電動モータ１，２のオイル冷却装
置の主要な構成部分である。この場合閉鎖カバー１２と
軸受シールド１１とに配置された、冷却通路１７の入口
開口１８は、単数又は複数の消費機の戻し導管に接続さ
れている。As viewed in the radial direction, a ring-shaped cylindrical cooling passage 17 is formed between the hollow shaft 3 of the first electric motor 1 and the casing 16 of the second electric motor 2. The passage 17 is a main component of the oil cooling device for the electric motors 1 and 2. In this case, the inlet openings 18 of the cooling passages 17 arranged on the closing cover 12 and the bearing shield 11 are connected to the return conduit of one or more consumers.

【００３０】図２から分かるように、冷却通路１７の出
口開口１９は円板７に設けられており、吸込み通路１３
に接続された通路２０と接続されている。入口開口１
８、冷却通路１７及び出口開口１９を通って流れる液圧
オイルを用いて、両電動モータ１，２は冷却される。も
ちろん、電動モータ１，２の制御装置を冷却することも
可能である。この場合制御装置は有利には駆動装置にフ
ランジ結合されており、その結果電動モータ１，２のオ
イル冷却装置は制御装置をも一緒に冷却する。As can be seen from FIG. 2, the outlet opening 19 of the cooling passage 17 is provided in the disc 7 and
Is connected to a passage 20 connected to the Entrance opening 1
8, the electric motors 1 and 2 are cooled by using hydraulic oil flowing through the cooling passage 17 and the outlet opening 19. Of course, it is also possible to cool the control devices of the electric motors 1 and 2. In this case, the control device is preferably flanged to the drive device, so that the oil cooling device of the electric motors 1, 2 also cools the control device together.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明による駆動ユニットを示す縦断面図であ
る。FIG. 1 is a longitudinal sectional view showing a drive unit according to the present invention.

【図２】図１に示された駆動ユニットの一部を拡大して
示す図である。FIG. 2 is an enlarged view showing a part of the drive unit shown in FIG. 1;

【符号の説明】[Explanation of symbols]

１，２ 電動モータ、 ３ 中空軸、 ４，５ ポン
プ、 ４ａ，５ｂ ポンプ軸、 ６ 閉鎖カバー、 ７
円板、 ８ 転がり軸受、 ９，１１ 軸受シール
ド、 １０ 転がり軸受、 １２ 閉鎖カバー、 １３
吸込み通路、 １４，１５ 圧力通路、 １６ ケー
シング、 １７冷却通路、 １８ 入口開口、 １９
出口開口、 ２０ 通路1, 2 electric motor, 3 hollow shaft, 4, 5 pump, 4a, 5b pump shaft, 6 closing cover, 7
Disc, 8 rolling bearing, 9, 11 bearing shield, 10 rolling bearing, 12 closing cover, 13
Suction passage, 14, 15 pressure passage, 16 casing, 17 cooling passage, 18 inlet opening, 19
Exit opening, 20 passages

フロントページの続き Ｆターム(参考） 3H044 AA02 BB01 BB03 CC10 CC11 CC14 CC19 DD01 DD02 DD06 DD11 DD18 DD19 DD21 DD28 5H607 AA12 BB01 BB06 BB14 BB18 CC01 CC05 DD03 DD09 DD19 EE31 FF06 FF08 GG08 Continued on the front page F term (reference) 3H044 AA02 BB01 BB03 CC10 CC11 CC14 CC19 DD01 DD02 DD06 DD11 DD18 DD19 DD21 DD28 5H607 AA12 BB01 BB06 BB14 BB18 CC01 CC05 DD03 DD09 DD19 EE31 FF06 FF08 GG08

Claims (14)

【特許請求の範囲】[Claims] 【請求項１】 電気液圧式の駆動ユニットであって、電
動モータと該電動モータによって駆動される液圧式のポ
ンプとが設けられている形式のものにおいて、電動モー
タ（１）内に少なくとも１つの別の電動モータ（２）が
組み込まれていて、該別の電動モータ（２）が、少なく
とも１つの別の液圧式のポンプ（５）と駆動結合されて
いることを特徴とする、電気液圧式の駆動ユニット。1. An electro-hydraulic drive unit comprising an electric motor and a hydraulic pump driven by the electric motor, wherein at least one electric motor is provided in the electric motor (1). Electro-hydraulic type, characterized in that another electric motor (2) is incorporated, said further electric motor (2) being drivingly connected with at least one further hydraulic pump (5). Drive unit. 【請求項２】 第１及び／又は第２の液圧式のポンプ
（４；５）が少なくとも部分的に、第１及び／又は第２
の電動モータ（１；２）内に組み込まれている、請求項
１記載の電気液圧式の駆動ユニット。2. The method according to claim 1, wherein the first and / or second hydraulic pumps (4; 5) are at least partially provided with first and / or second hydraulic pumps.
2. The electro-hydraulic drive unit according to claim 1, wherein the drive unit is integrated in the electric motor (1; 2). 【請求項３】 両液圧式のポンプ（４，５）が側部にお
ける１つの閉鎖カバー（６）内に配置されている、請求
項２記載の電気液圧式の駆動ユニット。3. The electro-hydraulic drive unit according to claim 2, wherein the two-hydraulic pump (4, 5) is arranged in one closing cover (6) on the side. 【請求項４】 両ポンプ（４，５）が互いに平行に配置
されていて、第１のポンプ（４）が、第１の電動モータ
（１）に結合された中空のポンプ軸（４ａ）を有してお
り、該ポンプ軸（１ａ）内に第２のポンプ（５）の、第
２の電動モータ（２）と結合されたポンプ軸（５ｂ）が
配置されている、請求項３記載の電気液圧式の駆動ユニ
ット。4. The two pumps (4, 5) are arranged parallel to each other and a first pump (4) is connected to a hollow pump shaft (4a) connected to a first electric motor (1). 4. The pump shaft (1b) according to claim 3, wherein a pump shaft (5b) of the second pump (5) coupled to the second electric motor (2) is arranged in the pump shaft (1a). Electro-hydraulic drive unit. 【請求項５】 ポンプ（４，５）が歯車ポンプ、特に環
状歯車ポンプとして形成されている、請求項１から４ま
でのいずれか１項記載の電気液圧式の駆動ユニット。5. The electrohydraulic drive unit according to claim 1, wherein the pumps (4, 5) are formed as gear pumps, in particular ring gear pumps. 【請求項６】 両ポンプ（４，５）が１つの共通の吸込
み通路（１３）を有している、請求項１から５までのい
ずれか１項記載の電気液圧式の駆動ユニット。6. The electrohydraulic drive unit according to claim 1, wherein both pumps have a common suction passage. 【請求項７】 第１の電動モータ（１）が、外側に位置
するステータと内側に位置するロータとを有しており、
ロータが中空軸（３）を有していて、該中空軸（３）内
に第２の電動モータ（２）が位置している、請求項１か
ら６までのいずれか１項記載の電気液圧式の駆動ユニッ
ト。7. A first electric motor (1) having an outer stator and an inner rotor,
7. The electric liquid according to claim 1, wherein the rotor has a hollow shaft (3), in which the second electric motor (2) is located. Pressure type drive unit. 【請求項８】 電動モータ（１，２）がオイル冷却され
るように構成されている、請求項１から７までのいずれ
か１項記載の電気液圧式の駆動ユニット。8. The electro-hydraulic drive unit according to claim 1, wherein the electric motor is configured to be oil-cooled. 【請求項９】 半径方向で見て第１の電動モータ（１）
の中空軸（３）と第２の電動モータ（２）のケーシング
（１６）との間に、冷却通路（１７）が形成されてお
り、該冷却通路（１７）が入口開口（１８）及び出口開
口（１９）に接続されていて、入口開口（１８）及び出
口開口（１９）が液圧回路と接続されている、請求項７
又は８記載の電気液圧式の駆動ユニット。9. A first electric motor (1) viewed in a radial direction.
A cooling passage (17) is formed between the hollow shaft (3) and the casing (16) of the second electric motor (2), and the cooling passage (17) has an inlet opening (18) and an outlet. 8. The connection to the opening (19), wherein the inlet opening (18) and the outlet opening (19) are connected to a hydraulic circuit.
Or the electrohydraulic drive unit according to 8. 【請求項１０】 入口開口（１８）が、液圧式の消費機
の戻し導管と接続されていて、該消費機が一方のポンプ
（４；５）に接続されており、出口開口（１９）がポン
プ（４；５）の吸込み通路（１３）と接続されている、
請求項９記載の電気液圧式の駆動ユニット。10. An inlet opening (18) is connected to a return line of a hydraulic consumer, said consumer being connected to one of the pumps (4; 5) and an outlet opening (19) being connected to one of the pumps (4; 5). Connected to the suction passage (13) of the pump (4; 5);
An electro-hydraulic drive unit according to claim 9. 【請求項１１】 第１のポンプ（４）が第２のポンプ
（５）に比べて大きな吐出量を有している、請求項１か
ら９までのいずれか１項記載の電気液圧式の駆動ユニッ
ト。11. The electrohydraulic drive according to claim 1, wherein the first pump (4) has a larger discharge rate than the second pump (5). unit. 【請求項１２】 第１のポンプ（４）が作業液圧装置
に、かつ第２のポンプ（５）が、走行可能な作業機械の
ステアリング液圧装置に接続されている、請求項１１記
載の電気液圧式の駆動ユニット。12. The hydraulic pump according to claim 11, wherein the first pump (4) is connected to a working hydraulic device and the second pump (5) is connected to a steering hydraulic device of a mobile work machine. Electro-hydraulic drive unit. 【請求項１３】 作業機械がフロア搬送装置として形成
されていて、作業液圧装置が昇降・傾斜シリンダを有し
ている、請求項１２記載の電気液圧式の駆動ユニット。13. The electro-hydraulic drive unit according to claim 12, wherein the working machine is formed as a floor transport device and the working hydraulic device has a lifting / tilting cylinder. 【請求項１４】 電動モータ（１，２）が三相交流モー
タとして形成されている、請求項１から１３までのいず
れか１項記載の電気液圧式の駆動ユニット。14. The electro-hydraulic drive unit according to claim 1, wherein the electric motor is formed as a three-phase AC motor.
JP2002066859A 2001-03-15 2002-03-12 Electro-hydraulic drive unit Expired - Fee Related JP4099337B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10112500.3 2001-03-15
DE10112500A DE10112500B9 (en) 2001-03-15 2001-03-15 Electrohydraulic drive unit

Publications (2)

Publication Number Publication Date
JP2002354764A true JP2002354764A (en) 2002-12-06
JP4099337B2 JP4099337B2 (en) 2008-06-11

Family

ID=7677587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002066859A Expired - Fee Related JP4099337B2 (en) 2001-03-15 2002-03-12 Electro-hydraulic drive unit

Country Status (2)

Country Link
JP (1) JP4099337B2 (en)
DE (1) DE10112500B9 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004359229A (en) * 2003-06-04 2004-12-24 Linde Ag Driving device provided with traveling driving unit and hydraulic working unit
CN103047134A (en) * 2013-01-24 2013-04-17 兰州理工大学 Non-oil-immersed air gap type hydraulic motor vane pump

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10307566A1 (en) * 2003-02-22 2004-09-02 Linde Ag Electrohydraulic double-pump, double-motor unit for a self-propelled work machine, especially an industrial truck
DE102008034176A1 (en) 2008-07-22 2010-01-28 Linde Material Handling Gmbh Hydraulic assembly for electric pump unit of fork-lift truck, has receiving space closed by housing cover that comprises through-hole for drive shaft, where hydraulic assembly is designed as pre-mountable component
WO2012149690A1 (en) * 2011-05-05 2012-11-08 贾润年 Generator motor for vehicle
DE102016218823A1 (en) 2016-09-29 2018-03-29 Audi Hungaria Motor Kft. cooling system
DE102017131227A1 (en) * 2017-12-22 2019-06-27 Frideco Ag Pump device, in particular flooding pump device
WO2022111757A1 (en) * 2020-11-24 2022-06-02 Schaeffler Technologies AG & Co. KG Gear pump

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261796A (en) * 1991-04-18 1993-11-16 Vickers, Incorporated Electric-motor in-line integrated hydraulic pump
DE19859287A1 (en) * 1998-12-22 2000-03-09 Bosch Gmbh Robert Electrohydraulic arrangement, esp. for mobile applications, e.g. for motor vehicle steering systems has drive system with number of motors corresp. to number of displacement devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004359229A (en) * 2003-06-04 2004-12-24 Linde Ag Driving device provided with traveling driving unit and hydraulic working unit
JP4621440B2 (en) * 2003-06-04 2011-01-26 リンデ マテリアル ハンドリング ゲゼルシャフト ミット ベシュレンクテル ハフツング Drive device provided with travel drive unit and working fluid pressure unit
CN103047134A (en) * 2013-01-24 2013-04-17 兰州理工大学 Non-oil-immersed air gap type hydraulic motor vane pump

Also Published As

Publication number Publication date
DE10112500B4 (en) 2012-05-31
DE10112500A1 (en) 2002-09-26
JP4099337B2 (en) 2008-06-11
DE10112500B9 (en) 2013-02-07

Similar Documents

Publication Publication Date Title
US11355999B2 (en) Method for cooling an electrical machine, and an electrical machine applying the method
US2524269A (en) Pump
US10267315B2 (en) Cryogenic submerged pump for LNG, light hydrocarbon and other electrically non-conducting and non-corrosive fluids
US20100014990A1 (en) Compressor Unit
EP2447540A2 (en) Method and system for cooling a motor-compressor with a closed-loop cooling circuit
EP2932097B1 (en) Cooling arrangement of a pump intended for pumping a liquid
CN107725174A (en) Turbocharger
CN108700071B (en) Screw compressor
KR102188436B1 (en) Drives for compressor elements and water-injection compressor arrangements with such drives
CN209340163U (en) For optimizing the compressor of inner space
US7193342B2 (en) Apparatus for cooling of electrical devices
JP5231059B2 (en) Hydraulic pump unit
JP2002354764A (en) Electro-hydraulic drive unit
JP4488491B2 (en) Self-propelled work machines, especially electro-hydraulic double pumps and double motor units for premises transportation vehicles
CN103080534A (en) Pump-turbine system
JP4867543B2 (en) Motor with pump means
CN104131982B (en) Special rectifying device oil pump is planted in special transformer and integration
CN106246559B (en) A kind of Double pump body double-suction type canned motor pump
US20050093385A1 (en) Electrical machine with cooling system
KR20190049087A (en) Motor cooling system of electric oil pump
US7828530B2 (en) Electric motor pump for swimming pool maintenance
JP5135156B2 (en) Servo motor liquid cooling structure and liquid cooling motor
JP2005146862A (en) Electric compressor
CN203962424U (en) Special transformer and integrated kind of special rectifying device oil pump
CN221257230U (en) Magnetic pump and pump cover

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050107

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20070323

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070914

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20071212

A602 Written permission of extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A602

Effective date: 20071217

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080115

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080305

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080317

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110321

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120321

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130321

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130321

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140321

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees