WO2009139409A1 - Hydraulic oil tank and method of producing the same - Google Patents
Hydraulic oil tank and method of producing the same Download PDFInfo
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- WO2009139409A1 WO2009139409A1 PCT/JP2009/058908 JP2009058908W WO2009139409A1 WO 2009139409 A1 WO2009139409 A1 WO 2009139409A1 JP 2009058908 W JP2009058908 W JP 2009058908W WO 2009139409 A1 WO2009139409 A1 WO 2009139409A1
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- hydraulic oil
- tank
- box
- air chamber
- tank body
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- 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
- F15B1/265—Supply reservoir or sump assemblies with pressurised main reservoir
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0883—Tanks, e.g. oil tank, urea tank, fuel tank
Definitions
- the present invention relates to a hydraulic oil tank that contains hydraulic oil, in which the oil level of the hydraulic oil is pressurized by air pressure, and a method for manufacturing the same.
- the hydraulic oil tank 5 has, for example, a tank body 6 as shown in FIG. 5 and an oil supply pipe 7 and a suction pipe 8 connected to the tank body 6.
- the tank body 6 is a rectangular parallelepiped box formed by a top plate, a bottom plate, and front, rear, left and right side plates, and the hydraulic oil 30 is accommodated therein.
- the hydraulic oil 30 accommodated in the tank body 6 is sent to the hydraulic pump through the oil supply pipe 7 and is sucked into the tank body 6 from the hydraulic actuator through the suction pipe 8.
- An air chamber 9 is formed in the upper part of the tank body 6, and the air pressure in the air chamber 9 pressurizes the hydraulic oil 30 in the tank body 6 from above.
- the hydraulic oil tank 5 has an air supply pipe 10 for supplying air into the air chamber 9 and a pressure reducing valve 11 provided in the air supply pipe 10.
- the air chamber 9 is opened and pressurized air is supplied to the air chamber 9.
- an air breather 12 is provided on the upper surface of the tank body 6, and when the pressure in the air chamber 9 exceeds a set value, the air breather 12 opens and releases the pressurized air to the outside of the tank body 6.
- the expansion of the capacity of the air chamber 9 is an important issue.
- the hydraulic oil tank 5 includes a large number of hydraulic actuators such as a large crusher and is mounted on a machine that uses a large amount of hydraulic oil
- the oil level in the hydraulic oil tank 5 changes greatly.
- the fluctuation of the pressure in the air chamber 9 also becomes severe. It is effective to increase the capacity of the air chamber 9 in order to suppress such fluctuations and prevent cavitation of the hydraulic pump.
- the installation space of the hydraulic oil tank 5 is limited, there is a limit to increasing the size of the hydraulic oil tank 5 in order to increase the capacity of the air chamber 9.
- FIG. 1 It is a section front view of the hydraulic oil tank concerning the embodiment of the present invention. It is a cross-sectional perspective view which opens and shows a part of the tank.
- A is a perspective view which shows the manufacturing method of the tank, Comprising: A perspective view which shows the process of joining a box to the baseplate of the tank main body of the said tank, (b) is another board joined to the said baseplate. It is a perspective view which shows a process. It is a side view which shows the base machine of the construction machine in which the same tank is installed. It is a schematic sectional drawing of the conventional hydraulic oil tank.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
A hydraulic oil tank (15) adapted such that, without a change in the shape and the size of a tank body and without an addition of an external air tank, the volume of an air chamber is increased to suppress a variation in the pressure in the tank. The hydraulic oil tank (15) is provided with a tank body (16) for containing therein hydraulic oil (30) and having a main air chamber (23) formed above the hydraulic oil, at least one box (27) having formed therein a sealed sub-air chamber (29) and mounted and fixed to the bottom of the tank body (16), and a communicating pipe (28) for interconnecting the main air chamber (23) and the sub-air chamber (29) in the box (27).
Description
本発明は、作動油を収容する作動油タンクであって、その作動油の油面が空気圧により加圧される方式のもの、及びこれを製造するための方法に関する。
The present invention relates to a hydraulic oil tank that contains hydraulic oil, in which the oil level of the hydraulic oil is pressurized by air pressure, and a method for manufacturing the same.
油圧ショベルや、これを転用して構成される破砕機、掘削機等の建設機械は、ベースマシンを備え、このベースマシンは、図４に示すようなクローラ式の下部走行体１と、その上に縦軸まわりに旋回自在に搭載される上部旋回体２とを備える。この上部旋回体２はアッパーフレーム３を有し、このアッパーフレーム３上に、ブーム、アーム、バケット等を備えた作業アタッチメント（図示しない）、キャビン４、作動油を貯留する作動油タンク５、同タンク５内の作動油をブームシリンダその他の油圧アクチュエータに供給する油圧ポンプ、同ポンプを駆動するエンジン（いずれも図示省略）等が設置される。
A construction machine such as a hydraulic excavator, a crusher configured by diverting the excavator, and an excavator includes a base machine, which includes a crawler type lower traveling body 1 as shown in FIG. And an upper revolving body 2 mounted so as to be rotatable about the vertical axis. The upper swing body 2 has an upper frame 3 on which a work attachment (not shown) including a boom, an arm, a bucket, etc., a cabin 4, a hydraulic oil tank 5 for storing hydraulic oil, A hydraulic pump that supplies hydraulic oil in the tank 5 to a boom cylinder and other hydraulic actuators, an engine that drives the pump (both not shown), and the like are installed.
前記作動油タンク５は、例えば、図５に示すようなタンク本体６と、このタンク本体６に接続される給油管７及び吸込み管８とを有する。タンク本体６は、天板、底板、及び前後左右各側板によって形成される直方体状の箱体であり、その中に作動油３０を収容する。このタンク本体６に収容された作動油３０は前記給油管７を通じて油圧ポンプに送られ、前記吸込み管８を通じて油圧アクチュエータからタンク本体６内に吸い込まれる。タンク本体６内の上部には空気室９が形成され、この空気室９の空気圧がタンク本体６内の作動油３０を上方から加圧する。
The hydraulic oil tank 5 has, for example, a tank body 6 as shown in FIG. 5 and an oil supply pipe 7 and a suction pipe 8 connected to the tank body 6. The tank body 6 is a rectangular parallelepiped box formed by a top plate, a bottom plate, and front, rear, left and right side plates, and the hydraulic oil 30 is accommodated therein. The hydraulic oil 30 accommodated in the tank body 6 is sent to the hydraulic pump through the oil supply pipe 7 and is sucked into the tank body 6 from the hydraulic actuator through the suction pipe 8. An air chamber 9 is formed in the upper part of the tank body 6, and the air pressure in the air chamber 9 pressurizes the hydraulic oil 30 in the tank body 6 from above.
さらに、この作動油タンク５は、前記空気室９内に空気を供給するための給気管１０と、この給気管１０に設けられた減圧弁１１とを有し、この減圧弁１１は空気室９の圧力が設定圧力よりも低くなると開いて空気室９に圧力空気を補給する。また、タンク本体６の上面にエアブリーザー１２が設けられ、空気室９の圧力が設定値を超えるとエアブリーザー１２が開いて圧力空気をタンク本体６の外部に逃がす。
Further, the hydraulic oil tank 5 has an air supply pipe 10 for supplying air into the air chamber 9 and a pressure reducing valve 11 provided in the air supply pipe 10. When the pressure becomes lower than the set pressure, the air chamber 9 is opened and pressurized air is supplied to the air chamber 9. Further, an air breather 12 is provided on the upper surface of the tank body 6, and when the pressure in the air chamber 9 exceeds a set value, the air breather 12 opens and releases the pressurized air to the outside of the tank body 6.
この作動油タンク５では、空気室９の容量の拡大が重要な課題である。例えば、この作動油タンク５が大型の破砕機のように多数の油圧アクチュエータを含んで作動油の使用量が多い機械に搭載されると、作動油タンク５内の油面の上下変化が激しく、空気室９の圧力の変動も激しくなる。このような変動を抑制して油圧ポンプのキャビテーションの防止等を図るには空気室９の容量を増やすのが有効である。しかし、作動油タンク５の設置スペースに制約があるため、前記空気室９の容量の拡大のために作動油タンク５を大型化するには限界がある。
In this hydraulic oil tank 5, the expansion of the capacity of the air chamber 9 is an important issue. For example, when the hydraulic oil tank 5 includes a large number of hydraulic actuators such as a large crusher and is mounted on a machine that uses a large amount of hydraulic oil, the oil level in the hydraulic oil tank 5 changes greatly. The fluctuation of the pressure in the air chamber 9 also becomes severe. It is effective to increase the capacity of the air chamber 9 in order to suppress such fluctuations and prevent cavitation of the hydraulic pump. However, since the installation space of the hydraulic oil tank 5 is limited, there is a limit to increasing the size of the hydraulic oil tank 5 in order to increase the capacity of the air chamber 9.
そこで、制約されたスペース内でタンク容量（空気室容積）を増加させる技術として、従来、特許文献１及び２に示されたものが知られている。特許文献１に記載される技術では、上部旋回体の既存設備である箱状構造物（たとえばメインフレーム等と称される梁材）が外置きのエアタンクとして利用され、その構造物と作動油タンクとが配管で接続されることにより空気室容量が実質的に増加される。特許文献２に開示されるタンクは、タンク本体と、その内部を主空気室と補助空気室とに仕切る垂直な隔壁と、これらの空気室同士を連通させる逆Ｕ字形の連通管とを有する。
Therefore, the techniques disclosed in Patent Documents 1 and 2 are conventionally known as techniques for increasing the tank capacity (air chamber volume) in a constrained space. In the technique described in Patent Document 1, a box-like structure (for example, a beam material called a main frame or the like) that is an existing facility of the upper swing body is used as an external air tank, and the structure and the hydraulic oil tank Are connected by piping, and the air chamber capacity is substantially increased. The tank disclosed in Patent Document 2 includes a tank body, a vertical partition that divides the inside of the tank into a main air chamber and an auxiliary air chamber, and an inverted U-shaped communication pipe that allows these air chambers to communicate with each other.
しかし、特許文献１記載の技術では、コスト面及び技術面上、既存設備本来の機能を生かしつつ、エアタンクとしての気密性を確保することが困難である。また、特許文献２記載のタンクでは、タンク本体に加えてその内部に配置される隔壁及びその外部に配管される連通管が著しいコストアップ及び重量の増大を招く。また、タンクの組立作業も面倒である。
However, with the technology described in Patent Document 1, it is difficult to ensure airtightness as an air tank while making use of the original functions of existing facilities in terms of cost and technology. Further, in the tank described in Patent Document 2, the partition wall arranged inside the tank body and the communication pipe piped outside the tank main body cause a significant increase in cost and weight. Also, the assembly work of the tank is troublesome.
本発明は、タンク本体の著しい形状やサイズの変更、外置きのエアタンクの増設を伴うことなく、空気室の容積を拡張して内圧の変動を抑えることができる作動油タンク、及びこれを容易に製造することができる方法を提供することを目的とする。
The present invention provides a hydraulic oil tank capable of expanding the volume of an air chamber and suppressing fluctuations in internal pressure without significantly changing the shape and size of the tank body and adding an external air tank, and easily It is an object to provide a method that can be manufactured.
この目的を達成するため、本発明に係る作動油タンクは、内部に作動油を収容し、この作動油の上側に主空気室が形成されてこの主空気室における空気圧が前記作動油を加圧するタンク本体と、内部に密閉された補助空気室を形成し、前記タンク本体の底部に配置されて当該タンク本体に固定される少なくとも一つの箱体と、前記箱体内の補助空気室と前記主空気室とを連通するように配置される連通管とを備える。
In order to achieve this object, the hydraulic oil tank according to the present invention accommodates hydraulic oil therein, a main air chamber is formed above the hydraulic oil, and the air pressure in the main air chamber pressurizes the hydraulic oil. A tank body, an auxiliary air chamber sealed inside, at least one box disposed at a bottom of the tank body and fixed to the tank body; an auxiliary air chamber in the box body; and the main air A communication pipe arranged to communicate with the chamber.
また、本発明に係る方法は、前記作動油タンクを製造するために、前記箱体に前記連通管を接続する工程と、前記タンク本体を構成する部材のうちの一部の特定の部材に前記箱体を接合する工程と、前記箱体への前記連通管の接続及び前記特定の部材への前記箱体の接合が終了した後に、当該特定の部材に前記タンク本体を構成する他の部材を接合して当該タンク本体を組み上げる工程とを含む。
In addition, the method according to the present invention includes the step of connecting the communication pipe to the box to manufacture the hydraulic oil tank, and the specific member among some members constituting the tank body. After the step of joining the box and the connection of the communication pipe to the box and the joining of the box to the specific member are finished, other members constituting the tank main body are connected to the specific member. Joining and assembling the tank body.
本発明の実施形態を図１～図３によって説明する。
Embodiments of the present invention will be described with reference to FIGS.
この実施形態にかかる作動油タンク１５は、図５に示される従来の作動油タンク５と共通点を有する。この共通点に関する事項は次のとおりである。
The hydraulic oil tank 15 according to this embodiment has common points with the conventional hydraulic oil tank 5 shown in FIG. Matters concerning this commonality are as follows.
（Ａ）作動油タンク１５は、タンク本体１６を有し、このタンク本体１６は、天板１７、底板１８、及び前後左右の各側板１９，２０，２１，２２によって直方体状の箱体に形成される。
(A) The hydraulic oil tank 15 has a tank main body 16, and the tank main body 16 is formed into a rectangular parallelepiped box by a top plate 17, a bottom plate 18, front and rear, left and right side plates 19, 20, 21, 22. Is done.
（Ｂ）前記タンク本体１６に、このタンク本体１６に収容された作動油３０を油圧ポンプに送るための給油管と、油圧アクチュエータからの戻り油をタンク本体１６内に吸い込むための吸い込み管とが接続される（いずれも図示省略）。
(B) The tank body 16 includes an oil supply pipe for sending the hydraulic oil 30 contained in the tank body 16 to the hydraulic pump, and a suction pipe for sucking the return oil from the hydraulic actuator into the tank body 16. They are connected (both not shown).
（Ｃ）タンク本体１６内の上部に主空気室２３が形成され、この主空気室２３の空気圧によりタンク内の作動油３０が上方から加圧される。
(C) A main air chamber 23 is formed in the upper part of the tank body 16, and the hydraulic oil 30 in the tank is pressurized from above by the air pressure of the main air chamber 23.
（Ｄ）主空気室２３に空気を供給するための給気管、減圧弁及びエアブリーザーを備える（いずれも図示省略）。
(D) An air supply pipe for supplying air to the main air chamber 23, a pressure reducing valve, and an air breather are provided (all not shown).
この実施の形態に係るタンク本体１６では、その天板１７と前後両側板１９，２０とが逆Ｕ字形の一枚の板で形成され、この一枚の板に底板１８及び左右両側板２１，２２が結合される。
In the tank body 16 according to this embodiment, the top plate 17 and the front and rear side plates 19 and 20 are formed of a single inverted U-shaped plate, and the bottom plate 18 and the left and right side plates 21, 22 are combined.
この作動油タンク１５は、前記タンク本体１６の底板１８の上面中央部に取付けられる作動油導出部２６を備えるのに加え、その特徴として、前記作動油導出部２６を挟んで前後両側に設けられる一対の箱体２７，２７と、各箱体２７にそれぞれ接続される連通管２８とを有する。
The hydraulic oil tank 15 includes a hydraulic oil lead-out portion 26 attached to the center of the upper surface of the bottom plate 18 of the tank main body 16, and as a feature thereof, is provided on both front and rear sides with the hydraulic oil lead-out portion 26 interposed therebetween. A pair of box bodies 27, 27 and a communication pipe 28 connected to each box body 27 are provided.
前記作動油導出部２６は、タンク本体１６内の外部に開口して図略の油圧ポンプに接続される導出口２５と、この導出口２５から導出される作動油３０中の異物を捕捉するフィルタ２４とを有する。
The hydraulic oil lead-out portion 26 opens to the outside of the tank body 16 and is connected to a hydraulic pump (not shown), and a filter that captures foreign matter in the hydraulic oil 30 led out from the lead-out port 25. 24.
前記各箱体２７は、前記タンク本体１６よりも小さい直方体状の独立した空気箱として形成され、その内部に気密状態に密閉された補助空気室２９を形成する。これらの箱体２７は、図１に示すようなタンク使用状態において、その全体（または機械の傾斜によっては一部が）作動油３０中に浸るように、タンク本体１６の底板１８に固定される。
Each box 27 is formed as a rectangular parallelepiped independent air box smaller than the tank main body 16, and an auxiliary air chamber 29 hermetically sealed is formed therein. These box bodies 27 are fixed to the bottom plate 18 of the tank body 16 so as to be immersed in the hydraulic oil 30 as a whole (or a part depending on the inclination of the machine) in the tank use state as shown in FIG. .
前記各連通管２８は、合成樹脂チューブ等からなる直管状のもので、対応する箱体２７の内部に連通し、かつ、この箱体２７から上向きに延びるように、当該箱体２７に接続され、固定される。この連通管２８の上端位置は、タンク使用状態において当該連通管２８の天板１７に近接する位置（作動油３０が入り込まない位置）で主空気室２３に開口する位置に設定される。つまり、この作動油タンク１５では、タンク本体１６内の底部に、各箱体２７，２７により囲まれた補助空気室２９が形成され、かつ、各補助空気室２９がこれに対応する連通管２８を通じてタンク本体１６内の上部に形成された主空気室２３に連通される。
Each of the communication pipes 28 is a straight tube made of a synthetic resin tube or the like and is connected to the corresponding box body 27 so as to communicate with the inside of the corresponding box body 27 and extend upward from the box body 27. Fixed. The upper end position of the communication pipe 28 is set to a position that opens to the main air chamber 23 at a position close to the top plate 17 of the communication pipe 28 (a position where the hydraulic oil 30 does not enter) when the tank is used. That is, in the hydraulic oil tank 15, an auxiliary air chamber 29 surrounded by the box bodies 27, 27 is formed at the bottom of the tank body 16, and each auxiliary air chamber 29 corresponds to the corresponding communication pipe 28. Through the main air chamber 23 formed in the upper part of the tank body 16.
この作動油タンク１５では、図１に示すタンク組立状態において、主空気室２３に加えて各箱体２７内に補助空気室２９が形成されることが、タンク内空気室全容積を拡張する。このことは、大型破砕機のように使用される油圧アクチュエータが多くて作動油の使用量が多い機械に作動油タンク１５が搭載された場合にも、油面の上下動に伴う主空気室２３の圧力変動が小さく抑えられることを可能にする。つまり、油面が安定した圧力で加圧されるのを可能にし、これにより、油圧ポンプのキャビテーション等のトラブル発生を防止する。しかも、タンク本体１６の形状やサイズの変更、あるいは外置きのエアタンクの増設を伴わないので、低いコスト及び小重量の構造で前記効果が実現される。
In the hydraulic oil tank 15, in the tank assembly state shown in FIG. 1, the formation of the auxiliary air chamber 29 in each box 27 in addition to the main air chamber 23 expands the total volume of the air chamber in the tank. This is because, even when the hydraulic oil tank 15 is mounted on a machine with a large amount of hydraulic oil used, such as a large crusher, the main air chamber 23 accompanying the vertical movement of the oil level. It is possible to reduce the pressure fluctuation of That is, it is possible to pressurize the oil surface with a stable pressure, thereby preventing troubles such as cavitation of the hydraulic pump. In addition, since the shape and size of the tank body 16 are not changed, or an external air tank is not added, the above-described effects can be realized with a low cost and small weight structure.
さらに、この作動油タンク１５は、それぞれ連通管２８が接続された一対の箱体２７がタンク本体底板１８の上面に取付けられる構造を有するので、その組立が簡単に行われる。具体的には、図３（ａ）に示すように、予めそれぞれ連通管２８が接続された一対の箱体２７を底板１８（タンク本体１６を構成する部材のうちの特定の部材）の上面に接合する工程と、この底板１８を図３（ｂ）に示すような他の板（タンク本体１６の構成部材）１７，２０，２１，２２と接合する工程とを含む方法により、前記のように主空気室２３及び一対の補助空気室２９を有してこれらの室２３，２９同士が相互に連通されるた作動油タンク１５が、簡単に組立てられる。例えば、特許文献２に記載されるタンクを組立てるには、そのタンク本体の組立後に同本体内を隔壁で仕切る工程及び外部に逆Ｕ字形の連通管を取付ける工程が必要であるのにくらべ、前記作動油タンク１５の組立は格段に容易であり、かつ、当該タンクの大幅なコストダウン及び重量低減が実現される。
Furthermore, the hydraulic oil tank 15 has a structure in which a pair of box bodies 27 to which the communication pipes 28 are connected are attached to the upper surface of the tank main body bottom plate 18, so that the assembly thereof is easily performed. Specifically, as shown in FIG. 3 (a), a pair of box bodies 27 to which communication pipes 28 are connected in advance are placed on the upper surface of the bottom plate 18 (a specific member of the members constituting the tank body 16). By the method including the step of joining and the step of joining the bottom plate 18 to other plates (component members of the tank body 16) 17, 20, 21, 22 as shown in FIG. A hydraulic oil tank 15 having a main air chamber 23 and a pair of auxiliary air chambers 29 in which the chambers 23 and 29 communicate with each other is easily assembled. For example, in order to assemble the tank described in Patent Document 2, the step of partitioning the inside of the main body with a partition after assembling the main body of the tank and the step of attaching an inverted U-shaped communication pipe to the outside are required. The assembly of the hydraulic oil tank 15 is much easier, and the cost and weight of the tank can be greatly reduced.
なお、前記箱体２７への前記連通管２８の接続は、当該箱体２７と前記底板１８等との接続が終了した後に行われてもよい。
The connection of the communication pipe 28 to the box body 27 may be performed after the connection between the box body 27 and the bottom plate 18 or the like is completed.
さらに、前記箱体２７同士の間に作動油導出部２６が配置されることは、これらの箱体２７が並ぶ特定方向について、この作動油導出部２６が作動油３０中に浸されるのを可能にする傾斜角度の上限値を大幅に上昇させる。すなわち、前記作動油タンク１５では、一対の箱体２７がタンク本体１６内の底部に沈められることによって作動油面３０Ａを嵩上げし、かつ、これらの箱体２７同士の間に作動油導出部２６が配置されるので、油面３０Ａが作動油導出部２６よりも上側に位置することを可能にする最大の傾斜角度（油面３０Ａがタンク本体１６に対して図１の二点鎖線で示される位置まで相対的に傾斜する角度）がきわめて大きくなる。このことは、作動油量を節減しながら作動油導出部２６からポンプへの正常な作動油の導出が保証されることを可能にし、作動油タンク１５のさらなるコストダウン及び重量低減に寄与する。
Furthermore, the hydraulic oil lead-out part 26 is disposed between the box bodies 27 because the hydraulic oil lead-out part 26 is immersed in the hydraulic oil 30 in a specific direction in which the box bodies 27 are arranged. The upper limit of the tilt angle that can be made is greatly increased. That is, in the hydraulic oil tank 15, the pair of box bodies 27 are submerged in the bottom of the tank body 16 to raise the hydraulic oil surface 30 </ b> A, and the hydraulic oil lead-out section 26 is between these box bodies 27. Therefore, the maximum inclination angle (the oil level 30A is indicated by the two-dot chain line in FIG. 1 with respect to the tank body 16) that allows the oil level 30A to be positioned above the hydraulic oil outlet 26. The angle of relative inclination to the position) becomes very large. This makes it possible to guarantee normal operation oil derivation from the operation oil outlet 26 to the pump while reducing the amount of operation oil, contributing to further cost reduction and weight reduction of the operation oil tank 15.
従来のタンクでは、空気室の容積の増大は油面の低下に直結するため、当該空気室の増加による内圧変動の抑制及び作動油量の節減と、作動油導出部の浸漬状態の確保とを両立させることができない。これに対して前記作動油タンク１５では、補助空気室２９を形成する一対の箱体２７が底板１８上に設けられ、その間に作動油導出部２６が設けられることが、前記の両立を可能にする。
In conventional tanks, the increase in the volume of the air chamber directly leads to a decrease in the oil level.Therefore, the increase in the air chamber suppresses fluctuations in internal pressure, reduces the amount of hydraulic oil, and ensures the immersion state of the hydraulic oil outlet. It cannot be made compatible. On the other hand, in the hydraulic oil tank 15, a pair of box bodies 27 forming the auxiliary air chamber 29 are provided on the bottom plate 18, and the hydraulic oil outlet 26 is provided between the boxes 27, thereby making it possible to achieve both of the above. To do.
本発明は、以上説明した実施の形態に限定されず、それ以外の形態にも適宜変更されて実施されることが可能である。
The present invention is not limited to the embodiment described above, and can be implemented with other modifications as appropriate.
例えば、タンク本体の底部に設けられる箱体の個数や位置は限定されない。作動油導出部が前後のいずれかまたは左右の何れかに偏った位置に設けられる場合には、その反対側に比較的大型の単一の箱体が配置されてもよい。その場合、当該箱体が前記作動油導出部よりも下位となる向きへのタンク本体の傾斜に対し、前記箱体による効果が有効に発揮される。また、図１に示されるように作動油導出部２６を両側から挟む箱体２７以外に他の箱体が追加的に設けられてもよい。また、一対の箱体２７が並ぶ方向は左右方向であってもよい。
For example, the number and position of boxes provided at the bottom of the tank body are not limited. In the case where the hydraulic oil lead-out portion is provided at a position biased to either the front or rear side or the left or right side, a relatively large single box may be arranged on the opposite side. In that case, the effect of the box is effectively exhibited against the inclination of the tank body in a direction in which the box is lower than the hydraulic oil outlet. Further, as shown in FIG. 1, other box bodies may be additionally provided in addition to the box body 27 that sandwiches the hydraulic oil lead-out portion 26 from both sides. Further, the direction in which the pair of box bodies 27 are arranged may be the left-right direction.
箱体やタンク本体の形状も、適宜設定が可能である。しかし、本発明は、タンク本体の底板の高さが全面にわたり一定である場合に、特に有効である。
The shape of the box and tank body can also be set as appropriate. However, the present invention is particularly effective when the height of the bottom plate of the tank body is constant over the entire surface.
箱体がタンク本体に固定される部位は底板に限られない。例えば、図３（ｂ）に示される側板１９，２０，２１，２２のいずれかの下部に箱体２７が固定されてもよい。その場合も、当該固定後に、その固定された板（特定の部材）に対して他の板が接合されることが、作動油タンク１５の組立てを容易にする。
The part where the box is fixed to the tank body is not limited to the bottom plate. For example, the box 27 may be fixed to any lower part of the side plates 19, 20, 21, and 22 shown in FIG. Also in this case, the assembly of the hydraulic oil tank 15 is facilitated by joining another plate to the fixed plate (specific member) after the fixing.
本発明では、タンク本体を構成する部材の一部（例えば図１に示される底板１８、あるいは側板１９～２２のうちの少なくとも一つの下部）が、箱体の一部を構成してもよい。
In the present invention, a part of the member constituting the tank body (for example, the bottom plate 18 shown in FIG. 1 or at least one lower part of the side plates 19 to 22) may constitute a part of the box.
本発明に係る連通管は、直管に限られない。例えば、タンク本体内に設けられる機器（弁など）を迂回するように曲がっていてもよい。要は、その上端開口部の位置が主空気室内に保持されていればよい。
The communication pipe according to the present invention is not limited to a straight pipe. For example, you may bend so that the apparatus (valve etc.) provided in a tank main body may be bypassed. In short, it is only necessary that the position of the upper end opening is held in the main air chamber.
以上のように、本発明によれば、タンク本体の著しい形状やサイズの変更、外置きのエアタンクの増設を伴うことなく、空気室の容積を拡張して内圧の変動を抑えることができる作動油タンクが提供される。この作動油タンクは、内部に作動油を収容し、この作動油の上側に主空気室が形成されてこの主空気室における空気圧が前記作動油を加圧するタンク本体と、内部に密閉された補助空気室を形成し、前記タンク本体の底部に配置されて当該タンク本体に固定される少なくとも一つの箱体と、前記箱体内の補助空気室と前記主空気室とを連通するように配置される連通管とを備える。この作動油タンクの箱体は、前記タンク本体の底部に補助空気室を形成することにより、タンク本体の形状やサイズの変更、あるいは外置きのエアタンクの増設を伴うことなく、タンク本体内の空気室の総容積を拡張して内圧変動の抑制に寄与する。
As described above, according to the present invention, the hydraulic fluid that can expand the volume of the air chamber and suppress fluctuations in the internal pressure without significantly changing the shape and size of the tank body and adding an external air tank. A tank is provided. This hydraulic oil tank contains hydraulic oil inside, a main air chamber is formed above the hydraulic oil, and an air pressure in the main air chamber pressurizes the hydraulic oil, and an auxiliary sealed inside An air chamber is formed, arranged at the bottom of the tank body and arranged to communicate with at least one box body fixed to the tank body, the auxiliary air chamber in the box body and the main air chamber. And a communication pipe. This hydraulic oil tank box has an auxiliary air chamber formed at the bottom of the tank body, so that the air in the tank body can be changed without changing the shape or size of the tank body or adding an external air tank. Expands the total volume of the chamber and contributes to the suppression of internal pressure fluctuations.
この作動油タンクにおいて、前記タンク本体の底部に設けられ、このタンク本体に収容される作動油を油圧ポンプへ導出するための作動油導出部を備える場合、この作動油導出部が前記箱体と隣接する位置に設けられるのが、よい。この作動油導出部の配置は、前記タンク本体の傾斜にかかわらず、また作動油の増量を伴うことなく、油圧ポンプ等への正常な作動油の導出を維持することを可能にする。
In this hydraulic oil tank, when the hydraulic oil is provided at the bottom of the tank main body and for supplying the hydraulic oil accommodated in the tank main body to the hydraulic pump, the hydraulic oil outlet is connected to the box. It is good to be provided at an adjacent position. This arrangement of the hydraulic oil lead-out section makes it possible to maintain normal lead-out of the hydraulic oil to the hydraulic pump or the like regardless of the inclination of the tank body and without accompanying an increase in the hydraulic oil.
具体的に、タンク本体内の作動油が前記作動油導出部を通じて油圧ポンプに吸い込まれる際、当該作動油とともに空気が吸い込まれるとポンプの故障を招くため、当該油圧ポンプの吸い込みによる正常な作動油の導出を保証するには、前記作動油導出部が前記作動油中に浸漬された状態を保つ必要がある。このため、前記作動油導出部はタンク本体内の底部に設置されるが、作動油タンクが搭載される機械の傾斜に伴って油面がタンク本体に対して相対的に大きく傾くことにより作動油導出部が作動油外部に露出するおそれがある。この傾斜に起因する露出を防ぐため、従来は、油面レベルの維持のために作動油の増量を余儀なくされていたが、この作動油の増量は、コストアップ及びタンクの重量増大に直結する。
Specifically, when the hydraulic oil in the tank body is sucked into the hydraulic pump through the hydraulic oil lead-out section, if air is sucked in together with the hydraulic oil, the pump will break down. In order to guarantee the derivation of the hydraulic oil, it is necessary to keep the hydraulic oil outlet portion immersed in the hydraulic oil. For this reason, the hydraulic oil lead-out section is installed at the bottom of the tank main body, but the hydraulic oil is tilted relatively greatly with respect to the tank main body with the inclination of the machine on which the hydraulic oil tank is mounted. There is a possibility that the lead-out portion is exposed outside the hydraulic oil. Conventionally, in order to prevent the exposure due to the inclination, the amount of hydraulic oil has been increased to maintain the oil level, but this increase in hydraulic fluid directly leads to an increase in cost and an increase in the weight of the tank.
これに対し、前記作動油導出部が前記箱体に隣接する位置に設けられる作動油タンクでは、この箱体が前記作動油導出部よりも下側に位置するようにタンク本体が傾いたときに当該箱体の存在が作動油導出部の上側に油面を押し上げることにより、当該作動油導出部が作動油に浸漬される状態を維持する。このことが、作動油量の節減を図りながら、作動油導出部による正常な作動油の導出を許容するタンク本体の傾斜角度の上限値をアップすることを可能にし、タンクのコストダウン及び重量低減に寄与する。
In contrast, in the hydraulic oil tank in which the hydraulic oil lead-out portion is provided at a position adjacent to the box body, when the tank body is tilted so that the box body is positioned below the hydraulic oil lead-out portion. The presence of the box pushes up the oil level to the upper side of the hydraulic oil lead-out portion, thereby maintaining the state where the hydraulic oil lead-out portion is immersed in the hydraulic oil. This makes it possible to increase the upper limit of the tilt angle of the tank body that allows normal operation oil to be derived by the operation oil outlet while reducing the amount of operation oil, thereby reducing the cost and weight of the tank. Contribute to.
さらに、前記箱体として、少なくとも、特定方向に並ぶ複数の箱体を含み、これらの箱体のうち互いに隣接する特定の箱体同士の間に前記作動油導出部が設けられるものでは、当該作動油導出部を挟む箱体のうちのいずれの側にタンク本体が傾いても、当該作動油導出部の浸漬状態を保つ効果が保証される。
Further, the box body includes at least a plurality of box bodies arranged in a specific direction, and the hydraulic oil lead-out portion is provided between specific box bodies adjacent to each other among these box bodies. Even if the tank body tilts to any side of the box body that sandwiches the oil lead-out part, the effect of maintaining the immersion state of the hydraulic oil lead-out part is guaranteed.
特に、前記作動油導出部が前記特定方向について前記タンク本体の底部の中央位置に設けられ、この作動油導出部を挟んでその両側の位置にそれぞれ箱体が配置されるものでは、前記特定方向の両側について略均等に、前記傾斜時に油面を維持する効果を得ることができる。
In particular, when the hydraulic oil lead-out portion is provided at the center position of the bottom of the tank body with respect to the specific direction, and the box bodies are respectively disposed at both sides of the hydraulic oil lead-out portion, the specific direction It is possible to obtain an effect of maintaining the oil level at the time of the inclination approximately equally on both sides of the oil.
前記連通管としては、前記箱体から上方に延び、かつ、当該連通管の上端が前記タンク本体内の主空気室の上端近傍の位置に保持されるように、当該連通管の下端部が当該箱体に固定されるものが、好適である。この連通管は、タンク本体の傾斜にかかわらず、当該連通管内への作動油の流入を防ぎながら前記主空気室と前記補助空気室との連通を保つことができる。
As the communication pipe, the lower end portion of the communication pipe extends upward from the box and is held at a position near the upper end of the main air chamber in the tank body. What is fixed to the box is suitable. This communication pipe can maintain the communication between the main air chamber and the auxiliary air chamber while preventing the hydraulic oil from flowing into the communication pipe regardless of the inclination of the tank body.
また本発明は、前記のような効果を奏し得る作動油タンクの製造方法を提供する。この方法は、前記箱体に前記連通管を接続する工程と、前記タンク本体を構成する部材のうちの一部の特定の部材に前記箱体を接合する工程と、前記箱体への前記連通管の接続及び前記特定の部材への前記箱体の接合が終了した後に、当該特定の部材に前記タンク本体を構成する他の部材を接合して当該タンク本体を組み上げる工程とを含む。
The present invention also provides a method of manufacturing a hydraulic oil tank that can achieve the effects as described above. The method includes the step of connecting the communication pipe to the box, the step of joining the box to some specific members of the members constituting the tank body, and the communication to the box. A step of assembling the tank body by joining other members constituting the tank body to the specific member after the connection of the pipe and the joining of the box to the specific member is completed.
この方法では、タンク本体が組み上げられる前の段階で、箱体への連通管の接続や、当該箱体を構成する特定の部材の一部と箱体との接合を容易に行うことができ、その後に当該特定の部材とそれ以外の箱体の構成部材とを接合することにより、作動油タンクを完成することができる。従って、特許文献２に示されるタンクの製造方法のように、タンク本体の組立後に同本体内を隔壁で気密に仕切る工程と、タンク本体の外部に逆Ｕ字形の連通管を取付ける工程とを含む方法に比べ、前記の優れた効果を奏する作動油タンクを低コストで製造することができる。
In this method, at the stage before the tank body is assembled, the connection of the communication pipe to the box and the joining of a part of a specific member constituting the box and the box can be easily performed. Then, the hydraulic oil tank can be completed by joining the specific member and the other structural members of the box. Accordingly, as in the tank manufacturing method disclosed in Patent Document 2, the process includes a step of airtightly partitioning the inside of the main body with a partition after assembling the tank main body, and a step of attaching an inverted U-shaped communication pipe to the outside of the tank main body. Compared with the method, the hydraulic oil tank that exhibits the above-described excellent effects can be manufactured at low cost.
Claims (6)
- 作動油を収容する作動油タンクであって、
内部に作動油を収容し、この作動油の上側に主空気室が形成されてこの主空気室における空気圧が前記作動油を加圧するタンク本体と、
内部に密閉された補助空気室を形成し、前記タンク本体の底部に配置されて当該タンク本体に固定される少なくとも一つの箱体と、
前記箱体内の補助空気室と前記主空気室とを連通するように配置される連通管とを備える、作動油タンク。 A hydraulic oil tank for containing hydraulic oil,
A tank body that contains hydraulic oil therein, a main air chamber is formed above the hydraulic oil, and an air pressure in the main air chamber pressurizes the hydraulic oil;
An auxiliary air chamber sealed inside, at least one box disposed at the bottom of the tank body and fixed to the tank body;
A hydraulic oil tank comprising a communication pipe arranged to communicate the auxiliary air chamber in the box and the main air chamber. - 請求項１記載の作動油タンクにおいて、前記タンク本体の底部に設けられ、このタンク本体に収容される作動油を油圧ポンプに向けて導出するための作動油導出部を備え、この作動油導出部は、前記箱体と隣接する位置に設けられる、作動油タンク。 The hydraulic oil tank according to claim 1, further comprising a hydraulic oil lead-out portion that is provided at a bottom portion of the tank main body and leads the hydraulic oil accommodated in the tank main body toward the hydraulic pump. Is a hydraulic oil tank provided at a position adjacent to the box.
- 請求項２記載の作動油タンクにおいて、前記箱体として、少なくとも、特定方向に並ぶ複数の箱体を含み、これらの箱体のうち互いに隣接する特定の箱体同士の間に前記作動油導出部が設けられる、作動油タンク。 3. The hydraulic oil tank according to claim 2, wherein the box includes at least a plurality of boxes arranged in a specific direction, and the hydraulic oil lead-out portion is disposed between specific boxes adjacent to each other among the boxes. A hydraulic oil tank is provided.
- 請求項３記載の作動油タンクにおいて、前記作動油導出部は、前記特定方向について前記タンク本体の底部の中央位置に設けられ、この作動油導出部を前記特定方向に挟んでその両側の位置にそれぞれ箱体が配置される、作動油タンク。 4. The hydraulic oil tank according to claim 3, wherein the hydraulic oil lead-out portion is provided at a center position of a bottom portion of the tank body in the specific direction, and the hydraulic oil lead-out portion is sandwiched in the specific direction at positions on both sides thereof. A hydraulic oil tank in which each box is placed.
- 請求項１～４のいずれかに記載の作動油タンクにおいて、前記連通管が前記箱体から上方に延び、かつ、当該連通管の上端が前記タンク本体内の主空気室の上端近傍の位置に保持されるように、当該連通管の下端部が当該箱体に固定される、作動油タンク。 5. The hydraulic oil tank according to claim 1, wherein the communication pipe extends upward from the box, and the upper end of the communication pipe is positioned near the upper end of the main air chamber in the tank body. A hydraulic oil tank in which a lower end portion of the communication pipe is fixed to the box so as to be held.
- 作動油を収容する作動油タンクであって、内部に作動油を収容し、この作動油の上側に主空気室が形成されてこの主空気室における空気圧が前記作動油を加圧するタンク本体と、内部に密閉された補助空気室を形成し、前記タンク本体の底部に配置されて当該タンク本体に固定される少なくとも一つの箱体と、前記箱体内の補助空気室と前記主空気室とを連通するように配置される連通管とを備える作動油タンクを製造するための方法であって、
前記箱体に前記連通管を接続する工程と、
前記タンク本体を構成する部材のうちの一部の特定の部材に前記箱体を接合する工程と、
前記箱体への前記連通管の接続及び前記特定の部材への前記箱体の接合が終了した後に、当該特定の部材に前記タンク本体を構成する他の部材を接合して当該タンク本体を組み上げる工程とを含む、作動油タンクの製造方法。 A hydraulic oil tank that contains hydraulic oil, the hydraulic oil is contained therein, a main air chamber is formed above the hydraulic oil, and an air pressure in the main air chamber pressurizes the hydraulic oil; An auxiliary air chamber hermetically sealed is formed, and at least one box disposed at the bottom of the tank main body and fixed to the tank main body communicates with the auxiliary air chamber in the box and the main air chamber. A method for producing a hydraulic oil tank comprising a communication pipe arranged to
Connecting the communication pipe to the box;
Joining the box to some specific members of the members constituting the tank body;
After the connection of the communication pipe to the box body and the connection of the box body to the specific member are completed, the tank body is assembled by bonding another member constituting the tank body to the specific member. The manufacturing method of a hydraulic oil tank including a process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008129765A JP5098799B2 (en) | 2008-05-16 | 2008-05-16 | Hydraulic oil tank |
| JP2008-129765 | 2008-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009139409A1 true WO2009139409A1 (en) | 2009-11-19 |
Family
ID=41318776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2009/058908 WO2009139409A1 (en) | 2008-05-16 | 2009-05-13 | Hydraulic oil tank and method of producing the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5098799B2 (en) |
| WO (1) | WO2009139409A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954054A (en) * | 2012-11-19 | 2013-03-06 | 无锡市京锡冶金液压机电有限公司 | Hydraulic oil tank structure of milling device |
| CN106640782A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Self-pressurized oil tank device |
| CN107035658A (en) * | 2017-06-23 | 2017-08-11 | 醴陵市万隆机械有限公司 | Oily after-treatment device and vavuum pump |
| CN114537905A (en) * | 2022-01-19 | 2022-05-27 | 江西中船航海仪器有限公司 | Inflatable seal assembled oil tank |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102686603B (en) | 2009-12-14 | 2014-12-17 | 国立大学法人北海道大学 | Peptides imparting cell permeability to lipid membrane structure and/or enhancing cell permeability of lipid membrane structure, and lipid membrane structure comprising lipid bound to such peptide as constituent lipid and having cell permeability or showing enhanced cell permeability |
| JP5591169B2 (en) * | 2011-03-31 | 2014-09-17 | 富士重工業株式会社 | Transmission heating method and heating apparatus |
| WO2018193914A1 (en) * | 2017-04-18 | 2018-10-25 | ヤマシンフィルタ株式会社 | Tank device |
| JP6892316B2 (en) | 2017-04-18 | 2021-06-23 | ヤマシンフィルタ株式会社 | Tank device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49126904U (en) * | 1973-02-28 | 1974-10-30 | ||
| JPS57143401U (en) * | 1981-03-02 | 1982-09-08 | ||
| JPS5985401U (en) * | 1982-11-30 | 1984-06-09 | 日立建機株式会社 | Hydraulic oil tank device |
| JP2006177012A (en) * | 2004-12-22 | 2006-07-06 | Komatsu Ltd | Operating oil tank structure |
-
2008
- 2008-05-16 JP JP2008129765A patent/JP5098799B2/en not_active Expired - Fee Related
-
2009
- 2009-05-13 WO PCT/JP2009/058908 patent/WO2009139409A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49126904U (en) * | 1973-02-28 | 1974-10-30 | ||
| JPS57143401U (en) * | 1981-03-02 | 1982-09-08 | ||
| JPS5985401U (en) * | 1982-11-30 | 1984-06-09 | 日立建機株式会社 | Hydraulic oil tank device |
| JP2006177012A (en) * | 2004-12-22 | 2006-07-06 | Komatsu Ltd | Operating oil tank structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954054A (en) * | 2012-11-19 | 2013-03-06 | 无锡市京锡冶金液压机电有限公司 | Hydraulic oil tank structure of milling device |
| CN106640782A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Self-pressurized oil tank device |
| CN107035658A (en) * | 2017-06-23 | 2017-08-11 | 醴陵市万隆机械有限公司 | Oily after-treatment device and vavuum pump |
| CN114537905A (en) * | 2022-01-19 | 2022-05-27 | 江西中船航海仪器有限公司 | Inflatable seal assembled oil tank |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009275877A (en) | 2009-11-26 |
| JP5098799B2 (en) | 2012-12-12 |
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