JP3119325B2 - Piping structure of hydraulic excavator - Google Patents
Piping structure of hydraulic excavatorInfo
- Publication number
- JP3119325B2 JP3119325B2 JP05005627A JP562793A JP3119325B2 JP 3119325 B2 JP3119325 B2 JP 3119325B2 JP 05005627 A JP05005627 A JP 05005627A JP 562793 A JP562793 A JP 562793A JP 3119325 B2 JP3119325 B2 JP 3119325B2
- Authority
- JP
- Japan
- Prior art keywords
- piping
- operation valve
- block
- cylinder
- swing
- 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
- Operation Control Of Excavators (AREA)
- Shovels (AREA)
- Component Parts Of Construction Machinery (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、油圧式パワーショベル
における油圧ポンプの吐出圧油をアクチュエータに供給
する配管構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure for supplying hydraulic pressure discharged from a hydraulic pump to an actuator in a hydraulic power shovel.
【０００２】[0002]
【従来の技術】図１に示すように、エンジン１で駆動さ
れる油圧ポンプ２の吐出側を操作弁３に接続し、その操
作弁３をスイングシリンダ４、旋回油圧モータ５、ブー
ムシリンダ６、アームシリンダ７、バケットシリンダ
８、左走行油圧モータ９、右走行油圧モータ１０、ブレ
ードシリンダ１１にそれぞれ接続している。2. Description of the Related Art As shown in FIG. 1, a discharge side of a hydraulic pump 2 driven by an engine 1 is connected to an operation valve 3, and the operation valve 3 is connected to a swing cylinder 4, a swing hydraulic motor 5, a boom cylinder 6, The arm cylinder 7, the bucket cylinder 8, the left traveling hydraulic motor 9, the right traveling hydraulic motor 10, and the blade cylinder 11 are connected to each other.
【０００３】[0003]
【発明が解決しようとする課題】油圧式パワーショベル
は図２に示すように、走行体２０に旋回機構２１で上部
車体２２を旋回自在に取付け、この上部車体２２に運転
室２３を設けると共に、上部車体２２にブラケット２４
を左右スイング自在に設け、そのブラケット２４にブー
ム２５を上下揺動自在に設け、そのブーム２５にアーム
２６を上下揺動自在に設け、そのアーム２６にバケット
２７を上下揺動自在に設けてあり、前記下部走行体２０
に左右走行油圧モータ９，１０が取付けられ、旋回機構
２１に旋回油圧モータ５が取付けられ、ブラケット２４
と上部車体２２に亘ってスイングシリンダ４に取付けら
れ、ブラケット２４とブーム２５に亘ってブームシリン
ダ６が取付けられ、ブーム２５とアーム２６に亘ってア
ームシリンダ７が取付けられ、アーム２６とバケット２
７に亘ってバケットシリンダ８が取付けられ、前記走行
体２０側にブレードシリンダ１１が取付けてある。（図
示省略）そして、前記エンジン１、油圧ポンプ２、操作
弁３は上部車体２２にそれぞれ取付けてある。As shown in FIG. 2, in the hydraulic power shovel, an upper body 22 is pivotally mounted on a traveling body 20 by a turning mechanism 21, and a driver's cab 23 is provided on the upper body 22. Bracket 24 on upper body 22
Are provided so as to be swingable left and right, a boom 25 is provided on the bracket 24 so as to be vertically swingable, an arm 26 is provided on the boom 25 so as to be vertically swingable, and a bucket 27 is provided on the arm 26 so as to be vertically swingable. , The lower traveling body 20
Left and right traveling hydraulic motors 9 and 10 are mounted on the rotating mechanism 21, and the turning hydraulic motor 5 is mounted on the turning mechanism 21.
And the upper body 22 is attached to the swing cylinder 4, the boom cylinder 6 is attached to the bracket 24 and the boom 25, the arm cylinder 7 is attached to the boom 25 and the arm 26, and the arm 26 and the bucket 2
7, a bucket cylinder 8 is mounted, and a blade cylinder 11 is mounted on the traveling body 20 side. (The illustration is omitted.) The engine 1, the hydraulic pump 2, and the operation valve 3 are mounted on the upper vehicle body 22, respectively.
【０００４】このために、上部車体２２に設けた操作弁
３から各シリンダ、油圧モータに配管２８をそれぞれ接
続してあり、その配管２８の本数は図１に示すように１
６本で、スイベル入口側の６本の配管と油圧ポンプ２と
操作弁３の配管が３本で、ドレーン配管が２本となって
全体の配管本数が多くその配管作業が大変面倒となる
し、配管スペースが大きくなってしまう。なお、左右走
行モータ９，１０、ブレードシリンダ１１への配管２８
はスイベルジョイント２９を介して接続される。特に、
ポンプ２と操作弁３の配管と、ブームシリンダ６、アー
ムシリンダ７、バケットシリンダ８、スイングシリンダ
４、旋回油圧モータ５への配管２８と、スイベル２９入
口側の配管２８は長く配管作業が大変面倒となるし、配
管スペースが大きくなってしまう。To this end, pipes 28 are respectively connected from the operation valve 3 provided on the upper body 22 to each cylinder and a hydraulic motor, and the number of the pipes 28 is one as shown in FIG.
With six pipes, six pipes on the swivel inlet side, three pipes for the hydraulic pump 2 and the operation valve 3, and two drain pipes, the total number of pipes is large and the piping work becomes very troublesome. However, the piping space becomes large. The left and right traveling motors 9 and 10 and the pipe 28 to the blade cylinder 11
Are connected via a swivel joint 29. In particular,
The piping of the pump 2 and the operation valve 3, the piping 28 to the boom cylinder 6, the arm cylinder 7, the bucket cylinder 8, the swing cylinder 4, and the swing hydraulic motor 5, and the piping 28 at the swivel 29 inlet side are long, and piping work is very troublesome. And the piping space becomes large.
【０００５】そこで、本発明は前述の課題を解決できる
ようにした油圧式パワーショベルの配管構造を提供する
ことを目的とする。Accordingly, an object of the present invention is to provide a piping structure of a hydraulic power shovel capable of solving the above-mentioned problems.
【０００６】[0006]
【課題を解決するための手段】旋回油圧モータ５に旋回
・スイング用操作弁３０を一体的に設け、その操作弁を
スイングシリンダ４に配管で接続し、スイベルジョイン
ト２９に左走行用操作弁３１、右走行用操作弁３２、ブ
レード用操作弁３３を設け、ブームの上部車体寄り７に
ブーム用操作弁３４、アーム用操作弁３５、バケット用
操作弁３６を設け、この各操作弁を配管で各シリンダ、
左右走行油圧モータ９，１０に接続し、油圧ポンプ２の
吐出ポート２ａを前記旋回・スイング用操作弁３０のブ
ロック３８に配管で接続し、そのブロック３８を右走行
用操作弁３２のブロック３９に配管で接続し、このブロ
ック３９をブーム用操作弁３４のブロック４１に配管で
接続した油圧式パワーショベルの配管構造。Means for Solving the Problems A turning / swing operation valve 30 is provided integrally with the turning hydraulic motor 5, the operation valve is connected to the swing cylinder 4 by piping, and a left traveling operation valve 31 is connected to a swivel joint 29. , A right-hand operation valve 32 and a blade operation valve 33, and a boom operation valve 34, an arm operation valve 35, and a bucket operation valve 36 are provided on the upper part 7 of the boom near the vehicle body. Each cylinder,
Left and right traveling hydraulic motors 9 and 10 are connected, and the discharge port 2a of the hydraulic pump 2 is connected by piping to a block 38 of the turning / swing operation valve 30. The block 38 is connected to a block 39 of the right traveling operation valve 32. A piping structure of a hydraulic power shovel in which the block 39 is connected to the block 41 of the boom operation valve 34 by piping.
【０００７】[0007]
【作 用】配管本数を低減できるし、その配管の長さ
を短かくできるから、配管作業が簡単となると共に、配
管スペースを小さくできる。[Operation] The number of pipes can be reduced and the length of the pipes can be shortened, so that the piping work is simplified and the piping space can be reduced.
【０００８】[0008]
【実 施 例】図３に示すように、旋回油圧モータ５に
旋回・スイング用操作弁３０を一体的に設け、スイベル
ジョイント２９に左走行用操作弁３１、右走行用操作弁
３２、ブレード用操作弁３３を設け、ブームの根元、つ
まり上部車体寄りにブーム用操作弁３４、アーム用操作
弁３５、バケット用操作弁３６をそれぞれ設ける。[Embodiment] As shown in FIG. 3, a turning / swing operation valve 30 is provided integrally with the turning hydraulic motor 5, and a left traveling operation valve 31, a right traveling operation valve 32, and a blade An operation valve 33 is provided, and a boom operation valve 34, an arm operation valve 35, and a bucket operation valve 36 are provided at the base of the boom, that is, near the upper vehicle body.
【０００９】エンジン１と油圧ポンプ２は上部車体２２
に設け、その吐出ポート２ａを第１配管３７で旋回・ス
イング用操作弁３０に設けたブロック３８に接続し、こ
のブロック３８と右走行用操作弁３２に設けたブロック
３９を第２配管４０で接続し、このブロック３９をブー
ム用操作弁３４に設けたブロック４１に第３配管４２で
接続する。前記各ブロック３８，３９，４１はドレーン
配管４３でそれぞれ接続してある。The engine 1 and the hydraulic pump 2 are connected to an upper body 22.
And the discharge port 2a is connected by a first pipe 37 to a block 38 provided on the turning / swing operation valve 30. This block 38 and a block 39 provided on the right traveling operation valve 32 are connected by a second pipe 40. The block 39 is connected to a block 41 provided on the boom operation valve 34 by a third pipe 42. The blocks 38, 39, 41 are connected by a drain pipe 43, respectively.
【００１０】前記油圧ポンプ２は斜板２ｂの角度を変更
することで容量を可変とする可変容量型となり、その斜
板２ｂの角度はシリンダ４４で制御され、そのシリンダ
４４の受圧室４４ａには負荷圧が供給されてポンプ吐出
圧が負荷圧よりも若干高くなるように制御される。前記
シリンダ４４の受圧室４４ａは負荷圧検出用配管４５で
各ブロック３８，３９，４１に接続して各シリンダ、油
圧モータにおける最も高い負荷圧が供給される。また、
前記各操作弁はクローズドセンタ型式となって中立位置
の時にポンプポートを遮断するようにしてある。The hydraulic pump 2 is of a variable displacement type in which the displacement is varied by changing the angle of the swash plate 2b. The angle of the swash plate 2b is controlled by a cylinder 44, and the pressure receiving chamber 44a of the cylinder 44 When the load pressure is supplied, the pump discharge pressure is controlled to be slightly higher than the load pressure. The pressure receiving chamber 44a of the cylinder 44 is connected to each of the blocks 38, 39 and 41 by a load pressure detecting pipe 45, and the highest load pressure in each cylinder and the hydraulic motor is supplied. Also,
Each of the operation valves is of a closed center type, and shuts off the pump port when in the neutral position.
【００１１】このようであるから、油圧ポンプ２とブロ
ック３８を接続する第１配管３７、ブロック３８とブロ
ック３９を接続する第２配管４０、ブロック３９とブロ
ック４１を接続する第３配管４２、２本のスイング用配
管４６、２本の左走行用配管４７、２本の右走行用配管
４８、２本のブレード用配管４９、２本のブーム用配管
５０、２本のアーム用配管５１、２本のバケット用配管
５２、３本の負荷圧検出用配管４５の計２３本の配管で
良いし、各配管の長さを短かくできる。Thus, the first pipe 37 connecting the hydraulic pump 2 and the block 38, the second pipe 40 connecting the block 38 and the block 39, and the third pipes 42 and 2 connecting the block 39 and the block 41 are formed. Two swing pipes 46, two left travel pipes 47, two right travel pipes 48, two blade pipes 49, two boom pipes 50, two arm pipes 51, 2 A total of 23 pipes, that is, three bucket pipes 52 and three load pressure detection pipes 45, may be used, and the length of each pipe may be reduced.
【００１２】[0012]
【発明の効果】配管本数を低減できるし、その配管の長
さを短かくできるから、配管作業が簡単となると共に、
配管スペースを小さくできる。According to the present invention, the number of pipes can be reduced and the length of the pipes can be shortened.
Piping space can be reduced.
【図１】従来の配管構造を示す説明図である。FIG. 1 is an explanatory view showing a conventional piping structure.
【図２】油圧式パワーショベルの正面図である。FIG. 2 is a front view of the hydraulic power shovel.
【図３】本発明の配管構造を示す説明図である。FIG. 3 is an explanatory view showing a piping structure of the present invention.
【符号の説明】 １…エンジン、２…油圧ポンプ、２ａ…吐出ポート、４
…スイングシリンダ、５…旋回油圧モータ、６…ブーム
シリンダ、７…アームシリンダ、８…バケットシリン
ダ、９…左走行油圧モータ、１０…右走行油圧モータ、
１１…ブレードシリンダ、２９…スイベルジョイント、
３０…旋回・スイング操作弁、３１…左走行操作弁、３
２…右走行用操作弁、３３…ブレード用操作弁、３４…
ブーム用操作弁、３５…アーム用操作弁、３６…バケッ
ト用操作弁、３８…ブロック、３９…ブロック、４１…
ブロック、４４…シリンダ、４４ａ…受圧室、４５…負
荷圧検出用配管。[Description of Signs] 1 ... engine, 2 ... hydraulic pump, 2a ... discharge port, 4
... Swing cylinder, 5 ... Swing hydraulic motor, 6 ... Boom cylinder, 7 ... Arm cylinder, 8 ... Bucket cylinder, 9 ... Left traveling hydraulic motor, 10 ... Right traveling hydraulic motor,
11 ... blade cylinder, 29 ... swivel joint,
30 ... turning / swing operation valve, 31 ... left traveling operation valve, 3
2 ... right-hand operation valve, 33 ... blade operation valve, 34 ...
Operating valve for boom, 35 ... Operating valve for arm, 36 ... Operating valve for bucket, 38 ... Block, 39 ... Block, 41 ...
Block, 44: cylinder, 44a: pressure receiving chamber, 45: load pressure detection pipe.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭63−61461（ＪＰ，Ｕ) 実開 昭61−9287（ＪＰ，Ｕ) 実開 昭49−14901（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) E02F 9/00 E02F 3/36 E02F 3/43 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 63-61461 (JP, U) Japanese Utility Model Sho 61-9287 (JP, U) Japanese Utility Model Sho 49-14901 (JP, U) (58) Field (Int.Cl. 7 , DB name) E02F 9/00 E02F 3/36 E02F 3/43
Claims (2)
作弁３０を一体的に設け、その操作弁をスイングシリン
ダ４に配管で接続し、スイベルジョイント２９に左走行
用操作弁３１、右走行用操作弁３２、ブレード用操作弁
３３を設け、ブームの上部車体寄りにブーム用操作弁３
４、アーム用操作弁３５、バケット用操作弁３６を設
け、この各操作弁を配管で各シリンダ、左右走行油圧モ
ータ９，１０に接続し、油圧ポンプ２の吐出ポート２ａ
を前記旋回・スイング用操作弁３０のブロック３８に配
管で接続し、そのブロック３８を右走行用操作弁３２の
ブロック３９に配管で接続し、このブロック３９をブー
ム用操作弁３４のブロック４１に配管で接続したことを
特徴とする油圧式パワーショベルの配管構造。1. A swing / swing operating valve 30 is provided integrally with a swing hydraulic motor 5, and the operating valve is connected to the swing cylinder 4 by a pipe. A left running operating valve 31 is connected to a swivel joint 29; An operation valve 32 and a blade operation valve 33 are provided, and the boom operation valve 3 is provided near the upper body of the boom.
4. An operating valve 35 for the arm and an operating valve 36 for the bucket are provided. These operating valves are connected to the respective cylinders and the left and right traveling hydraulic motors 9 and 10 by piping, and the discharge port 2a of the hydraulic pump 2 is provided.
Is connected to the block 38 of the turning / swing operation valve 30 by piping, and the block 38 is connected to the block 39 of the right traveling operation valve 32 by piping, and this block 39 is connected to the block 41 of the boom operation valve 34. A hydraulic power shovel piping structure that is connected by piping.
記各操作弁をクローズドセンタ型式とし、その油圧ポン
プ２の容量を制御するシリンダ４４を設け、このシリン
ダ４４の受圧室４４ａを負荷圧検出用配管４５で前記各
ブロック３８，３９，４１に接続して最も高い負荷圧を
導入するようにした請求項１記載の油圧式パワーショベ
ルの配管構造。2. The hydraulic pump 2 is of a variable displacement type, each of the operation valves is of a closed center type, and a cylinder 44 for controlling the displacement of the hydraulic pump 2 is provided. The pressure receiving chamber 44a of the cylinder 44 detects load pressure. 2. The piping structure of a hydraulic power shovel according to claim 1, wherein the piping is connected to each of the blocks 38, 39 and 41 by a piping 45 so as to introduce the highest load pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05005627A JP3119325B2 (en) | 1993-01-18 | 1993-01-18 | Piping structure of hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05005627A JP3119325B2 (en) | 1993-01-18 | 1993-01-18 | Piping structure of hydraulic excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06212664A JPH06212664A (en) | 1994-08-02 |
| JP3119325B2 true JP3119325B2 (en) | 2000-12-18 |
Family
ID=11616398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05005627A Expired - Fee Related JP3119325B2 (en) | 1993-01-18 | 1993-01-18 | Piping structure of hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3119325B2 (en) |
-
1993
- 1993-01-18 JP JP05005627A patent/JP3119325B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06212664A (en) | 1994-08-02 |
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