JP2004270274A - Fluid supplying device attached power shovel - Google Patents

Fluid supplying device attached power shovel Download PDF

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Publication number
JP2004270274A
JP2004270274A JP2003061925A JP2003061925A JP2004270274A JP 2004270274 A JP2004270274 A JP 2004270274A JP 2003061925 A JP2003061925 A JP 2003061925A JP 2003061925 A JP2003061925 A JP 2003061925A JP 2004270274 A JP2004270274 A JP 2004270274A
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JP
Japan
Prior art keywords
fluid
tank
hydraulic
power shovel
water
Prior art date
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Pending
Application number
JP2003061925A
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Japanese (ja)
Inventor
Hiroshi Hayashi
宏 林
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SOLVE CORP CO Ltd
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SOLVE CORP CO Ltd
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Filing date
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Priority to JP2003061925A priority Critical patent/JP2004270274A/en
Priority to PCT/JP2004/002783 priority patent/WO2004079106A1/en
Priority to JP2005503112A priority patent/JPWO2004079106A1/en
Publication of JP2004270274A publication Critical patent/JP2004270274A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08Superstructures; Supports for superstructures
    • E02F9/0858Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0883Tanks, e.g. oil tank, urea tank, fuel tank

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid supplying device attached power shovel with a low center of gravity and high stability, excellent in read ability and having stabilized high operation safety by providing a plurality of balance tanks on a lower traveling body. <P>SOLUTION: The power shovel is so constituted such that an integral tank is provided to a leg of an X-shape in a plan view of the lower traveling body, a central tank and a hydraulic driving fluid pump are provided to the central part of the lower traveling body and that two to four balance tanks are provided to the upper part of the lower traveling body. Oil pressure is supplied through a swivel joint of the central part, the fluid in the balance tank can be transferred in the stabilizing direction, and it can be connected to a water wagon such as a trailer tank or the like. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は流体送給装置付きパワーショベルに関し、より詳しくは、少なくとも下部走行体に流体タンクとポンプとを備え、スイベルジョイントを介して上部旋回体のブーム先端部付近のノズルより流体を送給可能とした流体送給装置付きパワーショベルに関する。
【0002】
【従来の技術と課題】
従来、流体送給装置付きパワーショベルとしては、本発明者が共同発明者の1人である「給水及び/もしくは排水装置付きパワーショベル」(特願平4−82760,すなわち特公平8−26551)がある(図6参照)。
【0003】
これは上部旋回体上に水タンクWTと水ポンプWPを備え、更に微動作可能な回転バケット中心部に出入調節可能なノズルを備える回転バケット装置付きパワーショベルであり、必要箇所に対し正確に給水もしくは排水出来る点で極めて有効であり、折りしも発生した神戸・淡路大地震等において、倒壊家屋の除去処理、負傷者の救済、死者の遺体収容等に遺憾なく威力を発揮した事は勿論、一般の家屋解体、小規模土木工事等にも有用であり、なお需要は少なくない。
【0004】
しかし、従来のように上部旋回体上に流体タンクとポンプを配置したのでは、急傾斜地や地盤の軟弱な処で作業する際にパワーショベル自体が高重心となるため不安定となる事を避けられず、上部旋回体が大角度旋回する作業では地上の固定水栓からの直接旋回台に繋がれた給水ホースがもつれ、最悪の場合ホースが破れたり、切断するという危険もあった。
【0005】
そこで、本発明者は鋭意研究の結果流体タンクとポンプをより低部の下部走行体自体の内部もしくは走行体上もしくは走行体に吊下付設して、スイベルジョイントを介して上部旋回体上のノズルと繋ぐ事により、パワーショベルの悪路走破性を損なう事なく全体重心を低くして上記課題を解決し得る事を知り、更に工夫を加えて本発明に到達した。
【0006】
【発明の目的】
本発明の目的は、地面の傾斜や凹凸によって下部走行体が傾いても容易に転倒する事がなく、相当の地面傾斜角まで安定性を保ちながら、通常のパワーショベル動作およびこれに加えて回転バケットないしバケット付近より水等の流体を目標に向って噴射する等して正確に供給する事が可能な流体送給装置付きパワーショベルを提供する事である。
【0007】
【発明の構成】
本発明により、
流体送給装置付きパワーショベルにおいて、下部走行体に少なくとも流体タンクとポンプとを備え、スイベルジョイントを介して上部旋回体上のノズルより流体を目標に向って噴射送給可能とした事を特徴とする流体送給装置付きパワーショベル(請求項1)、
ノズルが揺動腕先端部のショベル自体もしくはその周辺に配設された移動ノズルである請求項1に記載の流体送給装置付きパワーショベル(請求項2)、
流体タンクが、下部走行体に設けられた外部からの流体補給口を備えた中央タンクないし同中央タンクとインテグラルタンクであるか、更にこれらに複数の安定化用タンクを付加したものである請求項1ないし2に記載の流体送給装置付きパワーショベル(請求項3)、
ポンプが複数の自吸式もしくは圧送式の電動ないし油圧駆動ポンプである請求項1ないし3の内いずれか1項に記載の流体送給装置付きパワーショベル(請求項4)、
スイベルジョイントが、上から下に向って順に▲1▼油圧−水圧、もしくは▲2▼電気(スリップリング)−油圧−水圧、もしくは▲3▼電気(スリップリング)−空圧−油圧−水圧の分配機構が配設されたスイベルジョイントである請求項1ないし4の内いずれか1項に記載の流体送給装置付きパワーショベル(請求項5)、
上部旋回体にエンジン駆動の空気圧縮機と空圧タンクを備え、該空圧タンクからスイベルジョイントを介して空圧を下部走行体のインテグラルタンクを含むタンク内の流体表面に導き流体を排出送給するようにした請求項5に記載の流体送給装置付きパワーショベル(請求項6)
および
送給流体が消火液もしくは水溶性塗料もしくはノズルもしくは付近で混合された研摩剤分散水である請求項1ないし6の内いずれか1項に記載の流体送給装置付きパワーショベル(請求項7)
が提供される。
【0008】
以下に実施例を用いて本発明を詳細に説明する。
【0009】
【実施例】
図1は実施例の一部断面側面図、図2は図1のR−S矢視図、図3は図2のU−V矢視図、図4は実施例油圧−水圧回路図、図5は実施例スイベルジョイントの概念図、図6は従来例側面図である。
【0010】
図1,2,3,4,5,6において、
100は実施例、110は下部走行体、111は平面X字型フレームをなす中空脚、112,113,114,115は水パイプ、120は上部旋回体、121は揺動腕、122,222は水ホース、123は水噴射ノズル、125はバケット、130はコックピット、200はタンクトレーラ、200Aは連結器、201は蓋、202は排水コック、203は操向車輪である。
【0011】
また1はエンジン、2は油圧ポンプ、3は油圧タンク(作動油タンク)、4はリリーフバルブ、5は電磁切替弁、6は電磁切替弁、7,8は油圧操作弁、9,11は油圧モータ、10Aは補助水ポンプ、10Bは電動ポンプ、10は水ポンプ、14,15,16は手動三方弁、17はスイベルジョイント、18は水タンク、20はストップバルブ、22は油圧パイロットバルブ(ペダル式)、23は水中ポンプ連結用ボート、24,25は駆動輪、24Mは左走行油圧モータ、25Mは右走行油圧モータ、26,27は従動輪、30は水管、CTは中央タンク、IT1…IT4…はインテグラルタンク、BT1,BT2,BT3,BT4はバランスタンク、P1…P4は自吸式水ポンプ(電動)、Wは水である。24A,25Aは油圧モータ、26,27は履帯従動輪、70はベアリング、90は履帯、500は地面である。
【0012】
図1では後方に連結された2個の操向車輪(後進の時履帯による本体操向と連動する。)203,203を備えるタンクトレーラ200よりホース222を介して自吸式水ポンプ11で水を吸い、下部走行体の各所に配したバランス水タンクのBT1〜4、中央水タンクCT、フレーム内インテグラルタンクIT1、IT4…に水Wを満たす。
【0013】
なお水補給口付近の水ポンプ11は電動でも良い。外部から圧力水が得られる時には水ポンプ11は空転もしくはバイパスさせる。各タンクに満たされた水Wは実施例が平地を走行ないし停止する時には各タンクすべてを満水とし、すべての水を電動ポンプP1,P2…と10B,10B…で中央水タンクCTに集め、中央水タンクCTの底部についている押し上げ型の強力な油圧駆動水ポンプ10でスイベルジョイント17を介して揺動腕121に沿って走るホース122に水を圧送することが出来る。油圧駆動ポンプ10は上部旋回体に配設されたエンジンで駆動される油圧ポンプから圧油タンク3を介し、更にスイベルジョイント17を介して供給される油圧で駆動される。なお、電動ポンプを多用する場合は二次電池を下部走行体に配置ないし、吊持して、パイロット電源ないし平時充電用電源のみをスイベルジョイント17のスリップリングを介してコネクトするのが望ましい。
【0014】
下部走行体110の中央部の油圧駆動水ポンプ10だけで水圧が不足する場合には上部旋回体上にシリーズに設けられた補助ポンプ(油圧駆動/電動)10Aで水を更に加圧し、バケット125付近のノズル123より水を噴射する。下部走行体上の水タンクすなわちインテグラルタンクIT,IT…バランスタンクBT1,BT2,中央タンクCTは夫々図2および図3のように配設されている。
【0015】
すなわち、4個のバランス水タンクBT1,BT2,BT3,BT4は図3のように下部走行体の荒地走行を妨げないように下部走行体上に略放射状に配設されており、各タンク間は水管30,30…と小型電動ポンプP,P…で水のタンク間移動が容易になし得るように接続されている。またバランスタンクBT内には走行体の進行方向及び巾方向に沿った適度な邪魔板(Buffle Plate)が溶接されており、タンク内の水は前後左右の移動に対し抵抗を受けるようにしてある。
【0016】
また頑丈な鋼製角管を用いた平面X字状の中空脚111はフレーム内部に多数のインテグラルタンクIT1…IT4…IT8が放射状に水パイプ112,112…で繋がれており、最下に設置された電動ポンプ10Bから水パイプ114を通って各IT内の水は中央タンクCTに押し上げられるようになっている。
【0017】
このプロセスは、上部旋回体120のエンジン1周辺に空気圧縮機(図示せず)を設け、空圧タンクを経てスイベルジョイント17を介し、各タンクまたは各インテグラルタンクIT1,IT2…の水面に高い空圧が均等にかかるようにすれば、潜水艦の緊急時メインタンクブローのようにしてノズル123より短時間高圧水を噴射する事が出来る。
【0018】
また各バランスタンクBT1〜BT4の貯水量は、操縦者がコックピット内で行うマニュアルコントロールを基本とするが、地面500の傾斜度、硬軟度、揺動腕の水平鉛直面回動角範囲等によって最適安定化貯水配分とするように予め作られたコンピュータプログラムにより、自動プログラム制御する事も出来る。
【0019】
また平面X字型の下部走行体フレームないし履帯外側の外縁に油圧または機械式ジャッキでなるアウトトリガー(Out Trigger)を増設し、更に安定性を増す事も出来る。但し、油圧ショベルの移動が多い場合にはこれらのアウトトリガーは走行の邪魔になるだけでなく、実施例全体が自重と外径が増し狭い場所に入らなくなる欠点を生じる。
【0020】
次に図4の油圧−水圧回路図を用いて実施例を詳述する。
【0021】
先ず、操縦者は上部旋回体120に配設されたエンジン1を始動し、作動油タンク3内の作動油を油圧ポンプ2により加圧し、リリーフバルブ4で圧力調整をしながら、電磁切換弁6とを同時に切替えながら、油圧操作弁7を踏下式パイロットバルブ22を指示圧に作動させて、水噴射の操作を行う。操作方法は次の手順による。
【0022】
吸込みの操作の場合は、手動三方切替弁14を操作して、水ポンプ10と水タンク18と水中ポンプ23の連結用ポート23の連結の切替を行う。
【0023】
その後で、油圧パイロットバルブ22を作動させ、油圧操作弁7からの高圧油で油圧モータ9を回転させることにより、水ポンプ10を同時作動させ、スイベルジョイント17を通して水を吸い上げる。
【0024】
噴射の操作の場合は、油圧操作弁8よりの高圧油で、油圧モータ11を回転させる事によりポンプ10Aを同時作動させ、前述のようにして吸込んだ水をスイベルジョイント17を通して、ノズル123から噴射させる。また流体としては水の代わりに、消火液、水溶性塗料もしくはノズル123付近で混合されるようにした研磨剤分散水とする事も出来る。
【0025】
吸込みの時は、予め手動三方切替弁14を開放し、手動三方切替弁15,16を閉じて踏下式パイロットバルブ22のペダル操作により作動させる。
【0026】
噴射の時は手動三方切替弁14を閉じて手動三方切替弁15,16を開放して踏下式パイロットバルブ22のペダル操作により作動させる。
【0027】
吸込みながら噴射の場合は、手動三方切替弁14と手動三方切替弁15,16を開放して踏下式パイロットバルブ22のペダル操作により作動させる。なお手動三方切替弁14,15,16を電磁切替弁に変える事も出来る。
【0028】
次に図5を用いて本発明スイベルジョイントを説明する。
【0029】
本発明に用いるスイベルジョイントの特徴は、略鉛直軸を回転軸とするスイベルジョイントであって上から下に向って順に▲1▼油圧−水圧▲2▼電気(スリップリング)−油圧−水圧もしくは▲3▼電気(スリップリング)−空圧−油圧−水圧の回動分配機構が配設されている事である。図5においては図示省略されているが、通常スイベルジョイントの空圧−油圧−水圧等の分配機構は、環状部を取り囲んで上下に2段の環状パッキング(O−リングなど)が配設され、流体の滲出を防止している。しかし、特に本発明の如く、電気、空圧、各段の油圧、水圧などの分配を司る回路を多数内蔵するスイベルジョイントにおいては、滲む程度の流体リークが生じ得るが、これの悪影響を最少限に止め、長期間の連続使用を確保するため、最上階にスリップリング40とブラシ41、次に空圧分配機構42を、次に油圧分配機構43、水圧分配機構44を順に配設した。なおこれらの分配機構は分配対象毎に複数個重ねてもよい。こうする事により、スリップリングが油や水に汚染されて接触不良を生じる事もなく、上記目的を達成する事が出来た。
【0030】
【発明の効果】
本発明を実施する事により前記目的のすべてが達成される。
すなわち低重心で安定度が高く、更に複数のバランスタンクを下部走行体に設けて悪路走破性に優れかつ安定化した操安性の高い流体送給装置付きパワーショベルが提供される。本発明では従来例に比べて押し上げポンプ設置により高圧噴射が可能になる。また吸込みながら噴射が可能になり、水以外の流体も可能である。建機本体のスイベルジョイントを利用するので旋回の邪魔にならない。また踏下式パイロットバルブのペダル踏下げの強弱により操縦者が自由に水圧を調節できる。
【0031】
また地雷処理に用いた場合、下部走行体の流体タンク類は万一地雷が爆発しても緩衝体、防御壁として機能し、コックピット内の操従者や、付近にいる作業者の安全性を増す効果が期待出来る。
【図面の簡単な説明】
【図1】実施例の一部断面側面図。
【図2】図1のR−S矢視図。
【図3】図2のU−V矢視図。
【図4】実施例油圧−水圧回路図。
【図5】実施例スイベルジョイントの概念図。
【図6】従来例側面図
【符号の説明】
100 実施例
110 下部走行体
111 平面X字型フレームをなす中空脚
112,113,114,115 水パイプ
120 上部旋回体
121 揺動腕
122,222 水ホース
123 水噴射ノズル
125 バケット
130 コックピット
200 タンクトレーラ
200A 連結器
201 蓋
202 排水コック
203 操向車輪
1 エンジン
2 油圧ポンプ
3 油圧タンク(作動油タンク)
4 リリーフバルブ
5 電磁切替弁
6 電磁切替弁
7,8 油圧操作弁
9,11 油圧モータ
10 水ポンプ
10A 補助水ポンプ
10B 電動ポンプ
14,15,16 手動三方弁
17 スイベルジョイント
18,19 水タンク
20 ストップバルブ
22 油圧パイロットバルブ(ペダル式)
23 水中ポンプ連結用ボート
24,25 駆動輪
24M 左走行油圧モータ
25M 右走行油圧モータ
26,27 従動輪
30 水管
CT 中央タンク
IT1…IT4… インテグラルタンク
BT1,BT2,BT3,BT4 バランスタンク
P1…P4 自吸式水ポンプ(電動)
WP 水ポンプ(従来例)
WT 水タンク(従来例)
24A,25A 油圧モータ
26,27 履帯従動輪
40 スリップリング
41 ブラシ
42 空圧分配機構
43 油圧分配機構
44 水圧分配機構
70 ベアリング
90 履帯
500 地面
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power shovel with a fluid feeding device, and more particularly, a fluid tank and a pump are provided at least in a lower traveling structure, and a fluid can be supplied from a nozzle near a boom tip of an upper revolving structure via a swivel joint. And a power shovel with a fluid feeding device.
[0002]
[Prior art and problems]
2. Description of the Related Art Conventionally, as a power shovel with a fluid feeding device, a “power shovel with a water supply and / or drainage device” (Japanese Patent Application No. 4-82760, ie, Japanese Patent Publication No. Hei 8-26551), the present inventor of which is one of the co-inventors. (See FIG. 6).
[0003]
This is a power shovel equipped with a rotating bucket device provided with a water tank WT and a water pump WP on an upper revolving structure, and further provided with a nozzle which can be adjusted in and out of the center of the rotating bucket which can be finely operated. It is also extremely effective in draining water, and in the event of the Kobe-Awaji Earthquake, which caused folds, of course, it was undeniably effective in removing collapsed houses, rescuing injured people, storing dead bodies, etc. It is also useful for general house demolition and small-scale civil engineering work, and the demand is still small.
[0004]
However, arranging the fluid tank and pump on the upper revolving superstructure, as before, avoids instability due to the high center of gravity of the power shovel itself when working on steep terrain or soft ground. However, when the upper revolving unit is turned at a large angle, the water supply hose connected directly to the swivel from the fixed faucet on the ground is tangled, and in the worst case, the hose may be broken or cut.
[0005]
The inventor of the present invention has conducted intensive studies and found that the fluid tank and the pump are suspended inside the lower traveling body itself, on the traveling body or on the traveling body, and the nozzle on the upper revolving body is connected via a swivel joint. It was found that the above-mentioned problem could be solved by lowering the overall center of gravity without impairing the ability of the power shovel to travel on rough roads, and the present invention was further improved to achieve the present invention.
[0006]
[Object of the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a normal power shovel operation and a rotation in addition to a normal ground excavation while maintaining stability up to a considerable inclination angle of the ground, so that the undercarriage does not easily fall down due to inclination or unevenness of the ground. An object of the present invention is to provide a power shovel with a fluid feeding device capable of accurately supplying a fluid such as water from a bucket or the vicinity of the bucket by injecting a fluid or the like toward a target.
[0007]
Configuration of the Invention
According to the present invention,
In a power shovel with a fluid feeding device, the lower traveling body is provided with at least a fluid tank and a pump, and is capable of jetting and feeding a fluid from a nozzle on an upper revolving body to a target via a swivel joint. A power shovel with a fluid feeding device (claim 1),
2. The power shovel with a fluid feeding device according to claim 1, wherein the nozzle is a moving nozzle disposed at or around the shovel at the tip of the swing arm.
The fluid tank is a central tank provided with an external fluid supply port provided on the lower traveling body, or the central tank and an integral tank, or a plurality of stabilizing tanks are added thereto. A power shovel with a fluid feeding device according to claim 1 or 2 (claim 3),
The power shovel with a fluid feeding device according to any one of claims 1 to 3, wherein the pump is a plurality of self-priming or pressure feeding type electric or hydraulic drive pumps (Claim 4).
The swivel joints are distributed from top to bottom in the order of (1) hydraulic-hydraulic or (2) electric (slip ring) -hydraulic-hydraulic or (3) electric (slip ring) -pneumatic-hydraulic-hydraulic-hydraulic. The power shovel with a fluid supply device according to any one of claims 1 to 4, wherein the mechanism is a swivel joint provided with the mechanism (claim 5).
The upper revolving unit is equipped with an engine-driven air compressor and a pneumatic tank, and pneumatic pressure is guided from the pneumatic tank to the fluid surface in the tank including the integral tank of the lower traveling unit via a swivel joint to discharge and send fluid. The power shovel with a fluid feeding device according to claim 5, wherein the power is supplied.
7. A power shovel with a fluid feeding device according to claim 1, wherein the feeding fluid is a fire extinguishing liquid, a water-soluble paint, or an abrasive dispersion mixed at or near a nozzle. )
Is provided.
[0008]
Hereinafter, the present invention will be described in detail with reference to Examples.
[0009]
【Example】
FIG. 1 is a partial cross-sectional side view of the embodiment, FIG. 2 is a view taken along the line R--S in FIG. 1, FIG. 3 is a view taken along the line V--V in FIG. 2, and FIG. 5 is a conceptual diagram of the swivel joint of the embodiment, and FIG. 6 is a side view of the conventional example.
[0010]
In FIGS. 1, 2, 3, 4, 5, and 6,
100 is an embodiment, 110 is a lower traveling body, 111 is a hollow leg forming a plane X-shaped frame, 112, 113, 114, and 115 are water pipes, 120 is an upper revolving body, 121 is a swing arm, and 122 and 222 are A water hose, 123 is a water injection nozzle, 125 is a bucket, 130 is a cockpit, 200 is a tank trailer, 200A is a coupler, 201 is a lid, 202 is a drain cock, and 203 is a steering wheel.
[0011]
1 is an engine, 2 is a hydraulic pump, 3 is a hydraulic tank (hydraulic oil tank), 4 is a relief valve, 5 is an electromagnetic switching valve, 6 is an electromagnetic switching valve, 7 and 8 are hydraulic operating valves, and 9 and 11 are hydraulic pressures. Motor, 10A is an auxiliary water pump, 10B is an electric pump, 10 is a water pump, 14, 15, and 16 are manual three-way valves, 17 is a swivel joint, 18 is a water tank, 20 is a stop valve, and 22 is a hydraulic pilot valve (pedal). ), 23 is a boat for connecting a submersible pump, 24 and 25 are drive wheels, 24M is a left traveling hydraulic motor, 25M is a right traveling hydraulic motor, 26 and 27 are driven wheels, 30 is a water pipe, CT is a central tank, IT1 ... IT4 ... is an integral tank, BT1, BT2, BT3 and BT4 are balance tanks, P1 ... P4 are self-priming water pumps (electrically driven), and W is water. 24A and 25A are hydraulic motors, 26 and 27 are crawler driven wheels, 70 is a bearing, 90 is a crawler, and 500 is the ground.
[0012]
In FIG. 1, a self-priming water pump 11 supplies water via a hose 222 from a tank trailer 200 having two steered wheels 203 (203, 203) which are connected to the rear (which is linked to the main body steering by the crawler crawler). To fill the water W into the balanced water tanks BT1 to BT4, the central water tank CT, and the integral tanks IT1, IT4,.
[0013]
The water pump 11 near the water supply port may be electrically driven. When pressure water is obtained from the outside, the water pump 11 is idled or bypassed. When the embodiment runs or stops on level ground, the water W filled in each tank is filled with all the water, and all the water is collected in the central water tank CT by the electric pumps P1, P2... And 10B, 10B. The water can be pumped through a swivel joint 17 to a hose 122 running along a swing arm 121 by a powerful hydraulic drive water pump 10 of a push-up type provided at the bottom of the water tank CT. The hydraulic drive pump 10 is driven by hydraulic pressure supplied from a hydraulic pump driven by an engine disposed on the upper revolving unit via the pressure oil tank 3 and further via a swivel joint 17. When the electric pump is frequently used, it is preferable that the secondary battery is not placed on or suspended from the lower traveling body, and only the pilot power supply or the normal charging power supply is connected via the slip ring of the swivel joint 17.
[0014]
If the hydraulic pressure is insufficient with only the hydraulically driven water pump 10 at the center of the lower traveling structure 110, the water is further pressurized by an auxiliary pump (hydraulic / electric) 10A provided in series on the upper revolving structure, and the bucket 125 Water is sprayed from a nearby nozzle 123. The water tanks on the lower traveling body, that is, integral tanks IT, IT... Balance tanks BT1, BT2, and central tank CT are arranged as shown in FIGS. 2 and 3, respectively.
[0015]
That is, the four balance water tanks BT1, BT2, BT3, and BT4 are disposed substantially radially on the lower traveling body so as not to hinder the traveling of the lower traveling body on rough terrain as shown in FIG. The water pipes 30, 30... And the small electric pumps P, P. In the balance tank BT, a suitable baffle plate (Buffle Plate) is welded along the traveling direction and the width direction of the traveling body, so that the water in the tank receives resistance to the front-back, left-right movement. .
[0016]
A flat X-shaped hollow leg 111 using a sturdy steel square tube has a number of integral tanks IT1... IT4... IT8 radially connected by water pipes 112, 112. The water in each IT is pushed up to the central tank CT from the installed electric pump 10B through the water pipe 114.
[0017]
In this process, an air compressor (not shown) is provided around the engine 1 of the upper revolving unit 120, and the water level of each tank or each of the integral tanks IT1, IT2... Is increased via the pneumatic tank and the swivel joint 17. If the air pressure is evenly applied, high-pressure water can be injected from the nozzle 123 for a short time as in the case of an emergency main tank blow of a submarine.
[0018]
The amount of water stored in each of the balance tanks BT1 to BT4 is based on manual control performed by the pilot in the cockpit, but is optimal according to the inclination of the ground 500, the hardness, the horizontal pivot angle range of the swing arm, and the like. Automatic program control can also be performed by a computer program prepared in advance so as to obtain a stable water distribution.
[0019]
In addition, an out-trigger (Out Trigger) composed of a hydraulic or mechanical jack may be added to the outer edge of the lower traveling frame or the outer surface of the crawler belt having a flat X-shape to further increase the stability. However, when the hydraulic excavator moves a lot, these outriggers not only hinder the running, but also have a disadvantage that the entire embodiment increases in its own weight and outer diameter and cannot enter a narrow place.
[0020]
Next, an embodiment will be described in detail with reference to a hydraulic-hydraulic circuit diagram of FIG.
[0021]
First, the operator starts the engine 1 disposed on the upper revolving unit 120, pressurizes the hydraulic oil in the hydraulic oil tank 3 with the hydraulic pump 2, adjusts the pressure with the relief valve 4, and controls the electromagnetic switching valve 6. The water injection operation is performed by operating the hydraulic operation valve 7 to the stepped-down pilot valve 22 to the command pressure while simultaneously switching the pressures. The operation method is as follows.
[0022]
In the case of the suction operation, the manual three-way switching valve 14 is operated to switch the connection between the connection ports 23 of the water pump 10, the water tank 18, and the submersible pump 23.
[0023]
Thereafter, the hydraulic pump 9 is operated by operating the hydraulic pilot valve 22 and rotating the hydraulic motor 9 with the high-pressure oil from the hydraulic operation valve 7, thereby sucking water through the swivel joint 17.
[0024]
In the case of the injection operation, the pump 10A is simultaneously operated by rotating the hydraulic motor 11 with the high-pressure oil from the hydraulic operation valve 8, and the water sucked as described above is injected from the nozzle 123 through the swivel joint 17. Let it. Instead of water, the fluid may be a fire extinguishing liquid, a water-soluble paint, or an abrasive dispersion water mixed near the nozzle 123.
[0025]
At the time of suction, the manual three-way switching valve 14 is opened in advance, the manual three-way switching valves 15 and 16 are closed, and the pedal is operated by operating the step-down pilot valve 22.
[0026]
At the time of injection, the manual three-way switching valve 14 is closed and the manual three-way switching valves 15 and 16 are opened to operate the pedal by operating the step-down pilot valve 22.
[0027]
In the case of the injection while sucking, the manual three-way switching valve 14 and the manual three-way switching valves 15 and 16 are opened and operated by the pedal operation of the step-down pilot valve 22. Note that the manual three-way switching valves 14, 15, 16 can be changed to electromagnetic switching valves.
[0028]
Next, the swivel joint of the present invention will be described with reference to FIG.
[0029]
The feature of the swivel joint used in the present invention is a swivel joint having a substantially vertical axis as a rotation axis, and from the top to the bottom: (1) hydraulic pressure-hydraulic pressure (2) electric (slip ring)-hydraulic pressure-hydraulic pressure or (1) 3) An electric (slip ring) -pneumatic-hydraulic-hydraulic rotation distribution mechanism is provided. Although not shown in FIG. 5, the pneumatic-hydraulic-hydraulic distribution mechanism of the swivel joint normally has two-stage annular packings (such as O-rings) arranged vertically around the annular portion. Prevents fluid seepage. However, in particular, as in the present invention, in a swivel joint including a large number of circuits for controlling distribution of electricity, pneumatic pressure, hydraulic pressure of each stage, hydraulic pressure, etc., a fluid leak of a degree of bleeding may occur, but the adverse effect thereof is minimized. And a slip ring 40 and a brush 41, then a pneumatic distribution mechanism 42, then a hydraulic distribution mechanism 43, and a water pressure distribution mechanism 44 were arranged on the top floor in order to ensure long-term continuous use. Note that a plurality of these distribution mechanisms may be stacked for each distribution target. By doing so, the slip ring was not contaminated with oil or water and a contact failure did not occur, thereby achieving the above object.
[0030]
【The invention's effect】
By carrying out the present invention, all of the above objects are achieved.
That is, there is provided a power shovel with a fluid feeding device which has a low center of gravity, a high degree of stability, and is provided with a plurality of balance tanks in the lower traveling body, is excellent in running on rough roads, is stable, and has high operability. In the present invention, high-pressure injection becomes possible by installing a push-up pump as compared with the conventional example. In addition, it becomes possible to eject while sucking, and a fluid other than water is also possible. Since the swivel joint of the construction machine is used, it does not interfere with turning. Also, the pilot can freely adjust the water pressure depending on the level of depression of the pedal of the step-down pilot valve.
[0031]
Also, when used for land mine disposal, the fluid tanks of the undercarriage function as shock absorbers and defensive walls even if a mine explodes, increasing the safety of operators in the cockpit and workers nearby. The effect can be expected.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view of an embodiment.
FIG. 2 is a view as viewed from the direction of arrows R-S in FIG. 1;
FIG. 3 is a view taken in the direction of the arrow IV in FIG. 2;
FIG. 4 is a hydraulic-hydraulic circuit diagram of an embodiment.
FIG. 5 is a conceptual diagram of an example swivel joint.
FIG. 6 is a side view of a conventional example.
100 Example 110 Lower traveling body 111 Hollow legs 112, 113, 114, 115 forming a plane X-shaped frame Water pipe 120 Upper revolving body 121 Swinging arms 122, 222 Water hose 123 Water injection nozzle 125 Bucket 130 Cockpit 200 Tank trailer 200A coupler 201 lid 202 drain cock 203 steering wheel 1 engine 2 hydraulic pump 3 hydraulic tank (hydraulic oil tank)
4 Relief valve 5 Electromagnetic switching valve 6 Electromagnetic switching valve 7, 8 Hydraulic operating valve 9, 11 Hydraulic motor 10 Water pump 10A Auxiliary water pump 10B Electric pump 14, 15, 16 Manual three-way valve 17 Swivel joint 18, 19 Water tank 20 Stop Valve 22 Hydraulic pilot valve (pedal type)
23 Submersible pump connection boats 24, 25 Drive wheels 24M Left traveling hydraulic motor 25M Right traveling hydraulic motors 26, 27 Follower wheels 30 Water pipe CT Central tank IT1 IT4 Integral tanks BT1, BT2, BT3, BT4 Balance tank P1 P4 Self-priming water pump (electric)
WP water pump (conventional example)
WT water tank (conventional example)
24A, 25A Hydraulic motors 26, 27 Crawler driven wheels 40 Slip ring 41 Brush 42 Pneumatic distribution mechanism 43 Hydraulic distribution mechanism 44 Water pressure distribution mechanism 70 Bearing 90 Crawler track 500 Ground

Claims (7)

流体送給装置付きパワーショベルにおいて、下部走行体に少なくとも流体タンクとポンプとを備え、スイベルジョイントを介して上部旋回体上のノズルより流体を目標に向って噴射送給可能とした事を特徴とする流体送給装置付きパワーショベル。In a power shovel with a fluid feeding device, a lower traveling body is provided with at least a fluid tank and a pump, and a fluid can be injected and fed from a nozzle on an upper revolving body toward a target via a swivel joint. Excavator with fluid feeder. ノズルが揺動腕先端部のショベル自体もしくはその周辺に配設された移動ノズルである請求項1に記載の流体送給装置付きパワーショベル。2. The power shovel with a fluid feeding device according to claim 1, wherein the nozzle is a moving nozzle disposed on or around the shovel at the tip of the swing arm. 流体タンクが、下部走行体に設けられた外部からの流体補給口を備えた中央タンクないし同中央タンクとインテグラルタンクであるか、更にこれらに複数の安定化用タンクを付加したものである請求項1ないし2に記載の流体送給装置付きパワーショベル。The fluid tank may be a central tank provided with an external fluid supply port provided on the lower traveling body, or the central tank and an integral tank, or a plurality of stabilizing tanks may be added thereto. Item 3. A power shovel with a fluid feeding device according to Item 1 or 2. ポンプが複数の自吸式もしくは圧送式の電動ないし油圧駆動ポンプである請求項1ないし3の内いずれか1項に記載の流体送給装置付きパワーショベル。The power shovel with a fluid feeding device according to any one of claims 1 to 3, wherein the pump is a plurality of self-priming or pressure feeding type electric or hydraulic drive pumps. スイベルジョイントが、上から下に向って順に▲1▼油圧−水圧、もしくは▲2▼電気(スリップリング)−油圧−水圧、もしくは▲3▼電気(スリップリング)−空圧−油圧−水圧の分配機構が配設されたスイベルジョイントである請求項1ないし4の内いずれか1項に記載の流体送給装置付きパワーショベル。The swivel joints are distributed from top to bottom in the order of (1) hydraulic-hydraulic or (2) electric (slip ring) -hydraulic-hydraulic or (3) electric (slip ring) -pneumatic-hydraulic-hydraulic-hydraulic. The power shovel according to any one of claims 1 to 4, wherein the power shovel is a swivel joint provided with the mechanism. 上部旋回体にエンジン駆動の空気圧縮機と空圧タンクを備え、該空圧タンクからスイベルジョイントを介して空圧を下部走行体のインテグラルタンクを含むタンク内の流体表面に導き流体を排出送給するようにした請求項5に記載の流体送給装置付きパワーショベル。The upper revolving unit is equipped with an engine driven air compressor and a pneumatic tank, and pneumatic pressure is guided from the pneumatic tank to the fluid surface in the tank including the integral tank of the lower traveling unit via a swivel joint to discharge and send fluid. The power shovel with a fluid feeding device according to claim 5, wherein the power is supplied. 送給流体が消火液もしくは水溶性塗料もしくはノズル付近で混合された研摩剤分散水である請求項1ないし6の内いずれか1項に記載の流体送給装置付きパワーショベル。The power shovel according to any one of claims 1 to 6, wherein the supply fluid is a fire extinguishing liquid, a water-soluble paint, or an abrasive dispersion mixed in the vicinity of the nozzle.
JP2003061925A 2003-03-07 2003-03-07 Fluid supplying device attached power shovel Pending JP2004270274A (en)

Priority Applications (3)

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JP2003061925A JP2004270274A (en) 2003-03-07 2003-03-07 Fluid supplying device attached power shovel
PCT/JP2004/002783 WO2004079106A1 (en) 2003-03-07 2004-03-04 Power shovel with fluid-feeding device
JP2005503112A JPWO2004079106A1 (en) 2003-03-07 2004-03-04 Excavator with fluid feeder

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Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01177999A (en) * 1988-01-08 1989-07-14 Electric Power Dev Co Ltd Liquid jet processing method
US5104154A (en) * 1989-04-25 1992-04-14 Kabushiki Kaisha Kobe Seiko Sho Swivel joint

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