JP3359704B2 - Hydraulic pressure source device - Google Patents
Hydraulic pressure source deviceInfo
- Publication number
- JP3359704B2 JP3359704B2 JP18388593A JP18388593A JP3359704B2 JP 3359704 B2 JP3359704 B2 JP 3359704B2 JP 18388593 A JP18388593 A JP 18388593A JP 18388593 A JP18388593 A JP 18388593A JP 3359704 B2 JP3359704 B2 JP 3359704B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- working fluid
- electric motor
- source device
- fluid
- 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.)
- Expired - Fee Related
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Cooling System (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、電動機と、該電動機
により駆動される液圧ポンプとをタンク内の作動液中に
収容した液圧源装置に関し、より詳細には、電動機の作
動液流出孔に管を接続し、該管の排出孔を作動液戻し路
部材の近傍に配置して、作動液の冷却およびゴミの沈殿
化を行って還流させるようにした液圧源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic pressure source device in which an electric motor and a hydraulic pump driven by the electric motor are contained in a hydraulic fluid in a tank. The present invention relates to a hydraulic pressure source device in which a pipe is connected to a hole, and a discharge hole of the pipe is disposed near a hydraulic fluid return path member to cool the hydraulic fluid and settle refuse to reflux.
【0002】[0002]
【従来の技術】図3は、従来における液圧源装置の構成
を示す上面図であり、図4は、従来における液圧源装置
に用いられる電動機の概略構成を示す半断面図である。
図において、1は液圧源装置の作動液を貯蔵するタン
ク、2はタンク1を一部分割する仕切板、3は電動機、
4は電動機3により駆動される液圧ポンプ、5は液圧ポ
ンプ4の吸入部、6は液圧ポンプ4の吐出部、7は作動
液の戻し路部材、8は電動機3の負荷側ブラケット、9
は反負荷側ブラケット、10は固定子、11は固定子コ
イル、12は回転子、13は軸、14および15は軸
受、16は作動液の流入孔、17は固定子10の背部に
設けた作動液の流通孔、18は作動液の流出孔、21は
電動機3のフレームである。22は、マグネットであ
る。2. Description of the Related Art FIG. 3 is a top view showing a configuration of a conventional hydraulic pressure source device, and FIG. 4 is a half sectional view showing a schematic configuration of a motor used in the conventional hydraulic pressure source device.
In the figure, 1 is a tank for storing the hydraulic fluid of the hydraulic pressure source device, 2 is a partition plate for partially dividing the tank 1, 3 is an electric motor,
4 is a hydraulic pump driven by the electric motor 3, 5 is a suction part of the hydraulic pump 4, 6 is a discharge part of the hydraulic pump 4, 7 is a return path member for hydraulic fluid, 8 is a load side bracket of the electric motor 3, 9
Is an anti-load side bracket, 10 is a stator, 11 is a stator coil, 12 is a rotor, 13 is a shaft, 14 and 15 are bearings, 16 is a working fluid inflow hole, and 17 is provided on the back of the stator 10. A hydraulic fluid circulation hole, 18 is a hydraulic fluid outflow hole, and 21 is a frame of the electric motor 3. 22 is a magnet.
【0003】次に、動作について説明する。電動機3に
より液圧ポンプ4が駆動されると、作動液が吸入部5よ
り吸入され、吐出部6より吐き出されて、液圧アクチェ
ータ(図示せず)を作動させる。そして、戻し路部材7
よりタンク1へ戻される。戻された作動液は、仕切板2
を迂回して流れ、再び、液圧ポンプ4の吸入部5から吸
入され、作動液の流れが形成される。尚、このように液
中で使用される電動機は、特開昭60−162433、
特開平4−222437に開示されている。Next, the operation will be described. When the hydraulic pump 4 is driven by the electric motor 3, the hydraulic fluid is sucked from the suction unit 5 and discharged from the discharge unit 6 to operate a hydraulic actuator (not shown). And the return path member 7
Is returned to tank 1. The returned hydraulic fluid is supplied to the partition plate 2
And is again sucked from the suction part 5 of the hydraulic pump 4 to form a flow of the hydraulic fluid. Incidentally, the electric motor used in the liquid as described above is disclosed in Japanese Patent Application Laid-Open No. 60-162433.
It is disclosed in Japanese Patent Application Laid-Open No. 4-22437.
【0004】電動機3は、作動液の流れに沿って設置さ
れているので、電動機3のフレーム21の外周を作動液
が流れると共に、流入孔16から作動液が電動機3内部
に導かれる。電動機3内に導かれた作動液は、回転する
回転子12による遠心力の作用を受け、例えば、回転子
12に接触している作動液は、回転子12の側壁に沿っ
て回転中心から外に向かって遠心力を受け、回転中心か
ら外に向かって流れる。そして、その作動液は、流通孔
17を通って液圧ポンプ4側の負荷側ブラケット8側に
流出する。この作動液は、流出孔18から電動機3の外
側へ導かれ、この作動液により電動機3の固定子10と
回転子12とが冷却される。なお、液圧源装置が作動す
るとき、作動液の液面は、必ず電動機3上面より上にあ
る。又、作動液中の金属製のゴミは、マグネット22に
よって吸着される。Since the motor 3 is installed along the flow of the hydraulic fluid, the hydraulic fluid flows around the outer periphery of the frame 21 of the motor 3, and the hydraulic fluid is guided into the motor 3 through the inlet 16. The working fluid guided into the electric motor 3 is subjected to the action of centrifugal force by the rotating rotor 12. For example, the working fluid in contact with the rotor 12 moves out of the center of rotation along the side wall of the rotor 12. The centrifugal force is applied toward, and it flows outward from the center of rotation. Then, the hydraulic fluid flows out to the load side bracket 8 side of the hydraulic pump 4 through the flow hole 17. The hydraulic fluid is guided to the outside of the electric motor 3 from the outflow hole 18, and the hydraulic fluid cools the stator 10 and the rotor 12 of the electric motor 3. When the hydraulic pressure source device operates, the level of the hydraulic fluid is always above the upper surface of the electric motor 3. Further, metal dust in the working fluid is adsorbed by the magnet 22.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、上記に
示されるような従来における液圧源装置にあっては、電
動機から流出した作動液が、すぐに液圧ポンプの吸入部
から吸入される。このとき電動機から流出する作動液
は、電動機を冷却するため周囲の作動液に比べて温度が
高くなる。また、この作動液は、回転子より受けた遠心
力により巻き上げられたゴミ等が含まれている。したが
って、このような高温で、ゴミ等が含有されている作動
液が、液圧ポンプから吸入されると、液圧ポンプ、液圧
アクチェータ、作動液そのものの寿命が短くなるため、
装置の信頼性を低下させるという問題点があった。However, in the conventional hydraulic pressure source device as described above, the hydraulic fluid flowing out of the electric motor is immediately sucked from the suction portion of the hydraulic pump. At this time, the working fluid flowing out of the motor has a higher temperature than the surrounding working fluid to cool the motor. In addition, the working fluid contains dust and the like that are wound up by centrifugal force received from the rotor. Therefore, when the working fluid containing dust and the like at such a high temperature is sucked from the hydraulic pump, the service life of the hydraulic pump, the hydraulic actuator, and the working fluid itself is shortened.
There is a problem that the reliability of the device is reduced.
【0006】この発明は、上記に鑑みてなされたもので
あって、作動液の冷却および作動液に含まれるゴミを少
なく還流させるようにして、液圧ポンプ、液圧アクチュ
エータ、作動液の寿命を伸ばし、信頼性の高い液圧源装
置を得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has been made to reduce the life of a hydraulic pump, a hydraulic actuator, and a hydraulic fluid by cooling the hydraulic fluid and reducing the amount of dust contained in the hydraulic fluid. An object of the present invention is to obtain a hydraulic power source device that is extended and has high reliability.
【0007】[0007]
【課題を解決するための手段】この発明に係る液圧源装
置は、上記の目的を達成するために、作動液を貯蔵する
タンクと、電動機により駆動される液圧ポンプとを備
え、前記液圧ポンプより吐き出されて前記タンクへ還流
する作動液を流す戻し路部材から、前記液圧ポンプの吸
入部への前記作動液の流れが前記タンク内に形成され、
前記タンク内に前記電動機と液圧ポンプとを作動液中に
浸漬すると共に、前記電動機を作動液の流れに沿って配
置した液圧源装置において、前記電動機のケーシング内
に作動液を導き、前記ケーシング内の固定子と回転子と
を作動液に浸漬させる流入孔を、前記ケーシングの上流
側に向かって開口すると共に、前記流入孔から流入し前
記回転子の遠心力により前記作動液を導き出す流出孔
を、前記流入孔より下流側の前記ケーシングに開口し、
前記流出孔に前記作動液を流す管を接続し、前記管の排
出孔を前記戻し路部材の近傍に配置したものである。In order to achieve the above object, a hydraulic pressure source device according to the present invention includes a tank for storing a hydraulic fluid, and a hydraulic pump driven by an electric motor. A flow of the working fluid is formed in the tank from a return path member that flows the working fluid that is discharged from the pressure pump and returns to the tank, to a suction part of the hydraulic pump,
In the hydraulic pressure source device in which the electric motor and the hydraulic pump are immersed in the hydraulic fluid in the tank and the electric motor is arranged along the flow of the hydraulic fluid, the hydraulic fluid is guided into the casing of the electric motor, An inflow hole for immersing the stator and the rotor in the casing in the hydraulic fluid is opened toward the upstream side of the casing, and flows out from the inflow hole and guides out the hydraulic fluid by centrifugal force of the rotor. Opening a hole in the casing downstream of the inflow hole,
A pipe through which the hydraulic fluid flows is connected to the outflow hole, and a discharge hole of the pipe is arranged near the return path member.
【0008】[0008]
【作用】この発明に係る液圧源装置は、電動機内部を通
過することにより高温化し、かつ、ゴミ等を含んでいる
作動液を、タンクの作動液戻し路部材近傍に導いて流出
することにより、液圧ポンプの吸入口まで再度タンク内
を一周させ、作動液の冷却と作動液に含有するゴミの沈
下を促進し、ポンプ吸入部から直接高温でゴミを含有す
る作動液を吸入させないように還流させる。With the hydraulic pressure source device according to the present invention, the temperature is raised by passing through the inside of the electric motor, and the hydraulic fluid containing dust and the like is guided to the vicinity of the hydraulic fluid return path member of the tank and flows out. Recirculate the inside of the tank again to the suction port of the hydraulic pump, promote cooling of the working fluid and settling of the garbage contained in the working fluid, and prevent the working fluid containing the garbage containing the dust at high temperature directly from the pump suction part. Bring to reflux.
【0009】[0009]
【実施例】以下、この発明に係る実施例を添付図面に基
づいて説明する。図1は、この発明に係る液圧源装置の
構成を示す上面図である。図において、1は作動液を貯
蔵するタンク、2はタンク1を一部分割する仕切板、3
は電動機(図2参照)、4は電動機3に駆動される液圧
ポンプ、5は液圧ポンプ4の吸入部、6は液圧ポンプ4
の吐出部、7は作動液の戻し路部材、20は電動機3の
内部を通過した液を導く可撓管である。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a top view showing the configuration of the hydraulic pressure source device according to the present invention. In the figure, 1 is a tank for storing the hydraulic fluid, 2 is a partition plate for partially dividing the tank 1, 3
Is an electric motor (see FIG. 2), 4 is a hydraulic pump driven by the electric motor 3, 5 is a suction part of the hydraulic pump 4, and 6 is a hydraulic pump 4.
, A return member 7 for the working fluid, and 20 a flexible tube for guiding the fluid that has passed through the inside of the electric motor 3.
【0010】図2は、この発明に係る電動機の概略構成
を示す半断面図である。図において、8は液圧ポンプ4
が接続され、電動機3の側面を支持する負荷側ブラケッ
ト、9は負荷側ブラケット8の反対側に設けられ、電動
機3の側面を支持する反負荷側ブラケット、10は固定
子、11は固定子コイル、12は回転子、13は回転子
12が取り付けられている軸、14および15は軸13
の各端を回転自在に支承する軸受、16は作動液の流入
孔、17は固定子10の背部に設けた作動液の流通孔、
19は作動液の流出孔、20は流出孔19に接続された
可撓管、21は電動機3のフレームである。FIG. 2 is a half sectional view showing a schematic structure of the electric motor according to the present invention. In the figure, 8 is a hydraulic pump 4
Are connected to the load side bracket for supporting the side surface of the motor 3, 9 is provided on the opposite side of the load side bracket 8, the anti-load side bracket for supporting the side surface of the motor 3, 10 is the stator, and 11 is the stator coil , 12 is a rotor, 13 is a shaft on which the rotor 12 is mounted, and 14 and 15 are shafts 13.
Bearings for rotatably supporting each end of the hydraulic fluid, 16 an inflow hole for hydraulic fluid, 17 a hydraulic fluid flow hole provided on the back of the stator 10,
Reference numeral 19 denotes a working fluid outflow hole, 20 denotes a flexible tube connected to the outflow hole 19, and 21 denotes a frame of the electric motor 3.
【0011】次に、動作について説明する。電動機3に
より液圧ポンプ4が駆動されると、作動液が吸入部5か
ら吸入され、吐出部6より吐き出されて、液圧アクチェ
ータ等(図示せず)を作動させる。そして、作動液は戻
し路部材7よりタンク1へ吐き出される。吐き出された
作動液は、仕切板2を迂回して流れ、再び液圧ポンプ4
の吸入部5から吸入され、作動液の流れが形成される。Next, the operation will be described. When the hydraulic pump 4 is driven by the electric motor 3, the hydraulic fluid is sucked from the suction unit 5 and discharged from the discharge unit 6 to operate a hydraulic actuator or the like (not shown). Then, the hydraulic fluid is discharged from the return path member 7 to the tank 1. The discharged hydraulic fluid bypasses the partition plate 2 and flows again.
And the flow of the hydraulic fluid is formed.
【0012】電動機3は、作動液の流れに沿って設置さ
れているので、電動機3のフレーム21の外周を作動液
が流れると共に、流入孔16から作動液が電動機3内部
に導かれる。電動機3内部に導かれた作動液は、回転す
る回転子12による遠心力の作用を受け、例えば、回転
子12に接触している作動液は、回転子12の側壁に沿
って回転中心から外に向かって遠心力を受け、回転中心
から外に向かって流れる。Since the electric motor 3 is installed along the flow of the hydraulic fluid, the hydraulic fluid flows around the outer periphery of the frame 21 of the electric motor 3, and the hydraulic fluid is guided into the electric motor 3 from the inflow hole 16. The working fluid guided into the electric motor 3 is subjected to the action of centrifugal force by the rotating rotor 12. For example, the working fluid in contact with the rotor 12 moves out of the center of rotation along the side wall of the rotor 12. The centrifugal force is applied toward, and it flows outward from the center of rotation.
【0013】該作動液は、流通孔17を通って液圧ポン
プ4側の負荷側ブラケッテ8側に流出する。また、回転
子12と固定子10との間の間隙を通って、液圧ポンプ
4側の負荷側ブラケット8側に流出する。この作動液
は、流出孔19を通り、可撓管20に導かれて、戻し路
部材7の近傍に排出される。この作動液により電動機3
の固定子10と回転子12とが冷却される。なお、液圧
源装置が作動するとき、作動液の流面は、必ず電動機3
上面より上にある。The hydraulic fluid flows out through the flow hole 17 to the load-side bracket 8 on the hydraulic pump 4 side. In addition, it flows out to the load side bracket 8 side of the hydraulic pump 4 through the gap between the rotor 12 and the stator 10. This hydraulic fluid is guided to the flexible tube 20 through the outflow hole 19 and discharged to the vicinity of the return path member 7. The motor 3
The stator 10 and the rotor 12 are cooled. When the hydraulic pressure source device operates, the flow surface of the hydraulic fluid must be
Above the top.
【0014】したがって、上記の如く、電動機3内部を
通過した作動液を、戻し路部材7の近傍に排出するよう
にしたので、温度が高く、かつ、ゴミ等を含んだ作動液
が、液圧ポンプ4から直接吸入されることがなくなる。
これにより電動機3内部を通過した作動液が液圧ポンプ
4の吸い込み口までタンク1内を一周するため、作動液
の冷却および含有するゴミの沈下が促進され、液圧ポン
プ4、液圧アクチェータ(図示せず)、作動液そのもの
の寿命が長くなり、信頼性の高い液圧源装置が得られ
る。また、作動液の強制冷却装置の装備を不要とする
か、あるいは冷却装置の負荷を大幅に軽減することがで
きるので、低コストの液圧源装置が得られる。Therefore, as described above, the working fluid that has passed through the inside of the electric motor 3 is discharged to the vicinity of the return path member 7, so that the working fluid having a high temperature and containing dust and the like is subjected to the hydraulic pressure. There is no longer any direct suction from the pump 4.
As a result, the hydraulic fluid that has passed through the inside of the electric motor 3 goes around the tank 1 to the suction port of the hydraulic pump 4, so that the cooling of the hydraulic fluid and the settling of the contained dust are promoted, and the hydraulic pump 4 and the hydraulic actuator ( The life of the working fluid itself is prolonged, and a highly reliable hydraulic pressure source device can be obtained. Further, since the provision of the forced cooling device for the hydraulic fluid is not required or the load on the cooling device can be greatly reduced, a low-cost hydraulic pressure source device can be obtained.
【0015】[0015]
【発明の効果】以上説明したように、この発明による液
圧源装置によれば、電動機内部を通過することにより高
温化し、かつ、ゴミ等を含んでいる作動液を、タンクの
作動液戻し路部材近傍に導いて流出することにより、液
圧ポンプの吸入口まで再度タンク内を一周させて作動液
の冷却と作動液に含有するゴミの沈下を促進し、ポンプ
吸入部から直接高温でゴミを含有する作動液を吸入させ
ないように還流させる構成としたため、液圧ポンプ、液
圧アクチュエータ、作動液の寿命を伸ばし、装置の信頼
性を向上させる。As described above, according to the hydraulic pressure source device of the present invention, the working fluid which passes through the inside of the electric motor, is heated to a high temperature, and contains dirt and the like is returned to the working fluid return passage of the tank. By guiding it to the vicinity of the component and flowing out, it makes a round of the inside of the tank again to the suction port of the hydraulic pump to promote cooling of the working fluid and settling of dust contained in the working fluid. Since the configuration is such that the contained hydraulic fluid is recirculated so as not to be sucked, the life of the hydraulic pump, the hydraulic actuator, and the hydraulic fluid is extended, and the reliability of the device is improved.
【図1】この発明に係る液圧源装置の構成を示す上面図
である。FIG. 1 is a top view showing a configuration of a hydraulic pressure source device according to the present invention.
【図2】図1に示した電動機の概略構成を示す半断面図
である。FIG. 2 is a half sectional view showing a schematic configuration of the electric motor shown in FIG.
【図3】従来における液圧源装置の構成を示す上面図で
ある。FIG. 3 is a top view showing a configuration of a conventional hydraulic pressure source device.
【図4】図3に示した電動機の概略構成を示す半断面図
である。FIG. 4 is a half sectional view showing a schematic configuration of the electric motor shown in FIG. 3;
1 タンク 3 電動機 4 液圧ポンプ 5 吸入部 6 吐出部 7 戻し路部材 10 固定子 12 回転子 16 流入孔 19 流出孔 20 可撓管 DESCRIPTION OF SYMBOLS 1 Tank 3 Electric motor 4 Hydraulic pump 5 Suction part 6 Discharge part 7 Return path member 10 Stator 12 Rotor 16 Inflow hole 19 Outflow hole 20 Flexible tube
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森川 俊夫 愛知県豊田市トヨタ町1番地 トヨタ自 動車株式会社内 (72)発明者 馬場 宏衛 愛知県岡崎市鉢地町字開山45番地 豊興 工業株式会社内 (72)発明者 向井 哲一 愛知県岡崎市鉢地町字開山45番地 豊興 工業株式会社内 (72)発明者 中本 道夫 名古屋市東区矢田南五丁目1番14号 三 菱電機株式会社 名古屋製作所内 (56)参考文献 特開 平4−165101(JP,A) 特開 平4−140501(JP,A) 特開 平4−88201(JP,A) 特開 平4−222437(JP,A) 特開 平4−354786(JP,A) 特開 昭60−162433(JP,A) 実開 平5−1001(JP,U) (58)調査した分野(Int.Cl.7,DB名) F15B 1/00 F15B 21/04 F04D 13/08 H02K 9/19 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshio Morikawa 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Co., Ltd. Inside the company (72) Inventor Tetsuichi Mukai 45, Hachiji-cho, Okazaki-shi, Aichi Pref.Toyoko Kogyo Co., Ltd. (72) Inventor Michio Nakamoto 5-1-1, Yata Minami, Higashi-ku, Nagoya City Mitsubishi Electric Corporation Nagoya Works (56) References JP-A-4-165101 (JP, A) JP-A-4-140501 (JP, A) JP-A-4-88201 (JP, A) JP-A-4-22237 (JP, A) A) JP-A-4-354786 (JP, A) JP-A-60-162433 (JP, A) JP-A-5-1001 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) ) F15B 1/00 F15B 21/04 F04D 13/08 H02K 9/19
Claims (1)
り駆動される液圧ポンプとを備え、前記液圧ポンプより
吐き出されて前記タンクへ還流する作動液を流す戻し路
部材から、前記液圧ポンプの吸入部への前記作動液の流
れが前記タンク内に形成され、前記タンク内に前記電動
機と液圧ポンプとを作動液中に浸漬すると共に、前記電
動機を作動液の流れに沿って配置した液圧源装置におい
て、前記電動機のケーシング内に作動液を導き、前記ケ
ーシング内の固定子と回転子とを作動液に浸漬させる流
入孔を、前記ケーシングの上流側に向かって開口すると
共に、前記流入孔から流入し前記回転子の遠心力により
前記作動液を導き出す流出孔を、前記流入孔より下流側
の前記ケーシングに開口し、前記流出孔に前記作動液を
流す管を接続し、前記管の排出孔を前記戻し路部材の近
傍に配置したことを特徴とする液圧源装置。A hydraulic pump driven by an electric motor, wherein the hydraulic fluid is discharged from the hydraulic pump and flows back to the tank through a return path member. A flow of the working fluid to a suction part of a pump is formed in the tank, and the motor and the hydraulic pump are immersed in the working fluid in the tank, and the motor is arranged along the flow of the working fluid. In the hydraulic pressure source device, the working fluid is guided into the casing of the electric motor, and an inflow hole for immersing the stator and the rotor in the casing in the working fluid is opened toward the upstream side of the casing, An outlet hole that flows in from the inlet hole and guides the working fluid by the centrifugal force of the rotor is opened in the casing downstream of the inlet hole, and a pipe through which the working fluid flows is connected to the outlet hole, A hydraulic pressure source device, wherein a discharge hole of the pipe is arranged near the return path member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18388593A JP3359704B2 (en) | 1993-07-26 | 1993-07-26 | Hydraulic pressure source device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18388593A JP3359704B2 (en) | 1993-07-26 | 1993-07-26 | Hydraulic pressure source device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0735102A JPH0735102A (en) | 1995-02-03 |
JP3359704B2 true JP3359704B2 (en) | 2002-12-24 |
Family
ID=16143530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18388593A Expired - Fee Related JP3359704B2 (en) | 1993-07-26 | 1993-07-26 | Hydraulic pressure source device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3359704B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102684436A (en) * | 2012-05-07 | 2012-09-19 | 上海福泽工业自动化设备有限公司 | Motor for immersion oil hydraulic pump |
JP2019120158A (en) * | 2017-12-28 | 2019-07-22 | 株式会社荏原製作所 | Pump device |
-
1993
- 1993-07-26 JP JP18388593A patent/JP3359704B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0735102A (en) | 1995-02-03 |
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