JPH0127850Y2 - - Google Patents
Info
- Publication number
- JPH0127850Y2 JPH0127850Y2 JP1983132024U JP13202483U JPH0127850Y2 JP H0127850 Y2 JPH0127850 Y2 JP H0127850Y2 JP 1983132024 U JP1983132024 U JP 1983132024U JP 13202483 U JP13202483 U JP 13202483U JP H0127850 Y2 JPH0127850 Y2 JP H0127850Y2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- filter
- oil
- filter element
- filter assembly
- 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
Links
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 33
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
Description
【考案の詳細な説明】 本考案は油圧用フイルタに関する。[Detailed explanation of the idea] The present invention relates to a hydraulic filter.
フオークリフト、パワーシヨベル、クローラド
リル、ブルドーザ等々の車載式油圧装置では、当
然、油タンク、ポンプ、エンジン、各種バルブ類
および先端にアクチユエータ（シリンダ、油圧モ
ータ等）が油圧配管で結合され、油圧システムを
構成している。この様な油圧システムにおいて
は、油中の異物の障害を防ぐためにフイルタが装
備されているが、その一つのサクシヨンフイルタ
は、従来タンク内に設けられるのが普通であつ
た。近年、フイルタエレメントの点検、交換を容
易にするために、フイルタ組立体を油タンクの外
へ設備することが行れるようになつてきたが、あ
る条件で、以下に述べる不具合が生ずることがあ
る。 On-vehicle hydraulic equipment such as forklifts, power shovels, crawler drills, bulldozers, etc. naturally has oil tanks, pumps, engines, various valves, and actuators (cylinders, hydraulic motors, etc.) connected to the tip with hydraulic piping, and the hydraulic system is It consists of Such a hydraulic system is equipped with a filter to prevent damage caused by foreign matter in the oil, and one of the suction filters has conventionally been normally installed inside the tank. In recent years, it has become possible to install the filter assembly outside the oil tank to facilitate inspection and replacement of the filter element, but under certain conditions the following problems may occur. .
すなわち、母機に搭載された油タンクとフイル
タ組立体の油面レベルは、母機が略水平にあると
きは良いが、母機が傾斜地にあるときは、フイル
タ組立体の油面レベルが下がり、油圧ポンプへ流
れる油の中に空気が吸い込まれることとなり、ポ
ンプの損傷、寿命低下あるいは異音、作業不能等
の不都合な現象を呈することとなる。 In other words, the oil level in the oil tank and filter assembly mounted on the mother machine is good when the mother machine is approximately horizontal, but when the mother machine is on a slope, the oil level in the filter assembly decreases and the hydraulic pump Air will be sucked into the oil flowing into the pump, resulting in damage to the pump, shortened lifespan, abnormal noises, and inconvenient phenomena such as inability to operate.
そこで本考案は上述の不都合を解消するフイル
タを提供することを目的としたものであり、その
特徴とする処は、油圧タンクとは別置きにし、油
圧タンクと油圧ポンプとの間に設けたサクシヨン
フイルタにおいて、フイルタ組立体の内部にフイ
ルタエレメントとフイルタエレメントの外周に位
置し、フイルタエレメントより高いレベルに開口
し、かつ、作動油の流通を妨げない程度にフイル
タ組立体内の天井に近接した整流筒を設けたこと
にあり、フイルタ組立体に流入した作動油が整流
筒の外周面に沿つて上昇し、整流筒の上端からフ
イルタエレメントに向つて下降し、フイルタエレ
メントを通過して油圧ポンプに流れるようにした
ので、空気の吸い込みはなくなり、ポンプの損
傷、寿命低下、異音発生等は防止される。 Therefore, the purpose of this invention is to provide a filter that eliminates the above-mentioned disadvantages.The main feature of this invention is that it is installed separately from the hydraulic tank and is installed between the hydraulic tank and the hydraulic pump. In a filter assembly, there is a filter element inside the filter assembly, and a rectifier located on the outer periphery of the filter element, opening at a higher level than the filter element, and close to the ceiling inside the filter assembly to the extent that it does not obstruct the flow of hydraulic oil. This is due to the fact that the cylinder is provided, and the hydraulic oil that flows into the filter assembly rises along the outer circumferential surface of the rectifier cylinder, descends from the upper end of the rectifier cylinder toward the filter element, passes through the filter element, and enters the hydraulic pump. Since it is made to flow, air is not sucked in, and damage to the pump, shortened lifespan, and abnormal noises are prevented.
本考案の実施例を以下図面に従つて詳細に説明
する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は、最も簡単な油圧装置の構成回路を示
す。１は油タンク、２は油タンク１から別置きさ
れたサクシヨンフイルタ組立体、３は油圧ポン
プ、４はエンジン、電動機等の油圧ポンプ３の駆
動源、５は切換弁、６は切換弁５の操作レバー、
７はアクチユエータの一例として示した油圧シリ
ンダ、８はリリーフ弁、１２，１３，１４はそれ
ぞれを接続する配管である。第２図は、本考案を
理解するに際しての、油タンク１とフイルタ組立
体２の油面レベルを含んだ従来構成を示してお
り、上記に加えて、９はフイルタ組立体２の上
蓋、１０はフイルタ組立体２内に設けたフイルタ
エレメントを示す。油タンク１、フイルタ組立体
２の内部には、図示するごとく油面レベルＡ，
Ｂ，Ｃ，Ｄとなる作動油と空気層Ｅ，Ｆがある。
空気層Ｅ，Ｆは、油圧ポンプ３の要求により、加
圧されることもある。母機が水平にあるとき、油
タンク１とフイルタ組立体２の油面レベルは、
Ａ，Ｂのごとくなり、通常フイルタエレメント１
０の頭は油面より突出して、点検、交換が容易に
なつている。油面レベルＣ，Ｄは、母機が傾斜地
にあるときで、油タンク１とフイルタ組立体２の
取付位置が離れているために発生するレベル変化
を示している。容易に理解されると思うが、油タ
ンク１とフイルタ組立体２と油ポンプ３の取付高
さは、油ポンプ３の作動油吸込み性能、フイ
ルタ組立体２内のフイルタエレメント１０の取扱
い性、例えばアクチユエータ７の伸縮や空気層
Ｅの必要量から定められる油タンク１内のレベル
等から、本件に関する不具合解消のための高さに
は設定できないものである。さらに、上記，
およびを最良に設計しても、フイルタ組立体２
の内部には空気層Ｆに油中空気やレベル変動で空
気が蓄積されることは解決しえない様である。 FIG. 1 shows the simplest circuit configuration of a hydraulic system. 1 is an oil tank, 2 is a suction filter assembly placed separately from the oil tank 1, 3 is a hydraulic pump, 4 is a driving source for the hydraulic pump 3 such as an engine or an electric motor, 5 is a switching valve, and 6 is a switching valve 5 operating lever,
7 is a hydraulic cylinder shown as an example of an actuator, 8 is a relief valve, and 12, 13, and 14 are pipes connecting each of them. FIG. 2 shows a conventional configuration including the oil level of the oil tank 1 and the filter assembly 2 when understanding the present invention, and in addition to the above, 9 is the upper cover of the filter assembly 2, shows a filter element provided within the filter assembly 2. Inside the oil tank 1 and filter assembly 2, there are oil level A, as shown in the figure.
There are hydraulic oil B, C, and D and air layers E and F.
The air layers E and F may be pressurized as required by the hydraulic pump 3. When the mother machine is horizontal, the oil level in the oil tank 1 and filter assembly 2 is
As shown in A and B, usually filter element 1
The head of the 0 protrudes above the oil level, making inspection and replacement easier. Oil level levels C and D indicate level changes that occur when the mother machine is on a slope and the mounting positions of the oil tank 1 and the filter assembly 2 are far apart. As can be easily understood, the mounting heights of the oil tank 1, filter assembly 2, and oil pump 3 depend on the hydraulic oil suction performance of the oil pump 3, the handling of the filter element 10 in the filter assembly 2, etc. Due to the expansion and contraction of the actuator 7 and the level within the oil tank 1 determined from the required amount of air layer E, etc., it is impossible to set the height to a level that will solve the problem related to this case. Furthermore, above,
Even with the best design of and, the filter assembly 2
It seems that there is no solution to the problem that air in the oil or air accumulates in the air layer F due to level fluctuations inside the oil tank.
そこで提案されたのが本考案であり、第３図
は、本考案の実施例を示すものであり、フイルタ
組立体２、フイルタエレメント１０、上蓋９は第
２図と同様であるが、フイルタエレメント１０の
外側に位置し、フイルタエレメント１０より高い
レベルで開口し、かつ、作動油の流通を妨げない
程度に上蓋９の内面に近接した整流筒１１を設け
ている。１１′は小孔を示し、整流筒の下部に数
個設けている。 Therefore, the present invention was proposed, and FIG. 3 shows an embodiment of the present invention. The filter assembly 2, filter element 10, and top cover 9 are the same as those in FIG. 2, but the filter element A rectifying tube 11 is provided outside the top cover 10, opening at a level higher than the filter element 10, and close to the inner surface of the upper lid 9 to the extent that it does not obstruct the flow of hydraulic oil. Reference numeral 11' indicates small holes, several of which are provided at the bottom of the rectifying cylinder.
第２図の油タンク１とフイルタ組立体２の油面
レベルＡ，Ｂが母機の作業（傾斜地走行や傾斜地
での作業）により時間とともに油面レベルＣ，Ｄ
のごとくなり、空気層Ｆの量が増加すると、吸入
配管１４から吸入配管１２へ作動油が流れるとき
に空気を巻き込み油圧ポンプ３で様々な不具合が
生ずる。端的には騒音とポンプ内部損傷による寿
命の低下である。しかしながら、現状では空気層
Ｆを無くすることはできない。そこで、第３図に
示す整流筒１１を設けてあることにより作動油の
流れを、１５→１６→１７のように、つまりフイ
ルタ組立体２に流入し、整流筒１１の外周面に沿
つて上昇し、整流筒１１の上端からフイルタエレ
メント１０に向つて下降するように整流せしめる
と、作動油は上蓋９の内面と整流筒１１との間〓
を充満しながら流れるのでいかなる条件の下で
も、空気層Ｆが生成されることがなくなる。尚初
期、新作動油注入時には、油タンク１とフイルタ
組立体２内の油面レベルがＡ，Ｂのごとくなつ
て、空気層Ｆが存在するが、システム運転後10数
秒で気泡がなくなり、正常化することは実験によ
り確認されている。また小孔１１′の役目は、フ
イルタエレメント１０の交換、点検時及び新油充
填時にフイルタ組立体２内の油面レベルをＢにす
るためのものである。 The oil levels A and B in the oil tank 1 and filter assembly 2 in Figure 2 change over time due to work on the mother machine (driving on slopes and work on slopes), and the oil levels C and D change over time.
If the amount of the air layer F increases, air will be drawn in when the hydraulic oil flows from the suction pipe 14 to the suction pipe 12, causing various problems in the hydraulic pump 3. The short answer is a reduction in service life due to noise and internal damage to the pump. However, at present, the air layer F cannot be eliminated. Therefore, by providing the straightening tube 11 shown in FIG. 3, the flow of hydraulic oil is directed from 15 to 16 to 17, that is, it flows into the filter assembly 2 and rises along the outer peripheral surface of the straightening tube 11. However, when the flow is rectified from the upper end of the rectifier cylinder 11 downward toward the filter element 10, the hydraulic oil flows between the inner surface of the upper cover 9 and the rectifier cylinder 11.
Since the air flows while filling the air, an air layer F will not be generated under any conditions. Initially, when new hydraulic oil is injected, the oil level in the oil tank 1 and filter assembly 2 will be as shown in A and B, and an air layer F will exist, but the air bubbles will disappear within 10 seconds after system operation, and the system will return to normal. It has been confirmed through experiments that this occurs. The role of the small hole 11' is to bring the oil level in the filter assembly 2 to B when replacing or inspecting the filter element 10, and when filling with new oil.
要するに本考案によれば、油圧タンクとは別置
きにし、油圧タンクと油圧ポンプとの間に設けた
サクシヨンフイルタにおいて、フイルタ組立体の
内部にフイルタエレメントとフイルタエレメント
の外周に位置し、フイルタエレメントより高いレ
ベルに開口し、かつ、作動油の流通を妨げない程
度にフイルタ組立体内の天井に近接した整流筒を
設け、フイルタ組立体に流入した作動油が整流筒
の外周面に沿つて上昇し、整流筒の上端からフイ
ルタエレメントに向つて下降し、フイルタエレメ
ントを通過して油圧ポンプに流れるようにしたこ
とにより、空気の吸い込みはなくなり、油圧ポン
プにおける騒音、内部損傷はなく、ポンプ寿命は
伸びる。 In short, according to the present invention, in a suction filter that is placed separately from a hydraulic tank and provided between the hydraulic tank and the hydraulic pump, the filter element and the filter element are located inside the filter assembly and on the outer periphery of the filter element. A rectifier cylinder is provided that opens at a higher level and is close to the ceiling within the filter assembly to the extent that it does not obstruct the flow of hydraulic oil, so that the hydraulic oil that has flowed into the filter assembly rises along the outer peripheral surface of the rectifier cylinder. By making the flow descend from the upper end of the rectifying tube toward the filter element, passing through the filter element, and flowing to the hydraulic pump, air is no longer sucked in, causing no noise or internal damage to the hydraulic pump, and extending the life of the pump. .
第１図は一般的な作業用油圧回路図、第２図は
従来の油圧タンクとフイルタ組立体との油面レベ
ルを示す説明図、第３図は本考案の実施例を示す
断面図である。
１……油タンク、２……サクシヨンフイルタ組
立体、３……油圧ポンプ、９……上蓋、１０……
フイルタエレメント、１１……整流筒、１５，１
６，１７……作動油流れ。
Fig. 1 is a general working hydraulic circuit diagram, Fig. 2 is an explanatory diagram showing the oil level of a conventional hydraulic tank and filter assembly, and Fig. 3 is a sectional view showing an embodiment of the present invention. . 1...Oil tank, 2...Suction filter assembly, 3...Hydraulic pump, 9...Top lid, 10...
Filter element, 11... Rectifier cylinder, 15, 1
6,17...Hydraulic oil flow.
Claims (1)
ポンプとの間に設けたサクシヨンフイルタにおい
て、フイルタ組立体の内部にフイルタエレメント
とフイルタエレメントの外周に位置し、フイルタ
エレメントより高いレベルに開口し、かつ、作動
油の流通を妨げない程度にフイルタ組立体内の天
井に近接した整流筒を設け、フイルタ組立体に流
入した作動油が整流筒の外周面に沿つて上昇し、
整流筒の上端からフイルタエレメントに向つて下
降し、フイルタエレメントを通過して油圧ポンプ
に流れるようにしたことを特徴とするフイルタ。 In a suction filter placed separately from the hydraulic tank and provided between the hydraulic tank and the hydraulic pump, a filter element is located inside the filter assembly and on the outer periphery of the filter element, and has an opening at a level higher than the filter element. Further, a rectifying cylinder is provided close to the ceiling within the filter assembly to an extent that does not obstruct the flow of hydraulic oil, and the hydraulic oil flowing into the filter assembly rises along the outer peripheral surface of the rectifying cylinder,
A filter characterized in that the flow descends from the upper end of the rectifier cylinder toward a filter element, passes through the filter element, and flows to a hydraulic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13202483U JPS6039316U (en) | 1983-08-26 | 1983-08-26 | filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13202483U JPS6039316U (en) | 1983-08-26 | 1983-08-26 | filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6039316U JPS6039316U (en) | 1985-03-19 |
| JPH0127850Y2 true JPH0127850Y2 (en) | 1989-08-24 |
Family
ID=30298283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13202483U Granted JPS6039316U (en) | 1983-08-26 | 1983-08-26 | filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6039316U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5214557B2 (en) * | 2009-08-07 | 2013-06-19 | 日立建機株式会社 | Hydraulic oil tank device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562912B2 (en) * | 1975-05-30 | 1981-01-22 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4879072U (en) * | 1971-12-28 | 1973-09-28 | ||
| JPS562912U (en) * | 1979-06-21 | 1981-01-12 |
-
1983
- 1983-08-26 JP JP13202483U patent/JPS6039316U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562912B2 (en) * | 1975-05-30 | 1981-01-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6039316U (en) | 1985-03-19 |
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