JP2011058565A - Driving circuit for one-channel type hydraulic cylinder, and expansion head using the same - Google Patents
Driving circuit for one-channel type hydraulic cylinder, and expansion head using the same Download PDFInfo
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Abstract
Description
本願発明は、土木建設機械、工作機械、その他各種産業機械における作業機器を駆動する油圧シリンダの駆動回路、及びそれを用いた拡大ヘッドに関する。 The present invention relates to a drive circuit for a hydraulic cylinder that drives work equipment in a civil construction machine, a machine tool, and other various industrial machines, and an expansion head using the drive circuit.
従来、例えば拡大ヘッドにおける拡大翼の拡開をはじめ、各種土木建設機械における各種作業機器の駆動手段として油圧シリンダを使用し、該油圧シリンダに外部の油圧源から圧力油を供給−戻りの２流路の油圧管路を通じて供給、排出して油圧シリンダを伸縮駆動させる駆動回路が広く使用されている。 Conventionally, for example, a hydraulic cylinder has been used as a driving means for various working machines in various civil engineering machines, including the expansion of an expansion blade in an expansion head, and pressure oil is supplied from an external hydraulic source to the hydraulic cylinder. 2. Description of the Related Art A drive circuit that supplies and discharges through a hydraulic line of a path to drive a hydraulic cylinder to expand and contract is widely used.
しかし、上記の油圧２流路型の駆動回路は、配管に費用がかかるばかりでなく、トラブルの発生が多くなり、特にアースオーガ下端に接続された拡大ヘッドの場合は、アースオーガの接続部分の構造が複雑となり、アースオーガ継ぎ足し時の接続、分離作業に手間のかかる欠点が大きかった。 However, the above hydraulic two-channel type drive circuit is not only expensive for piping but also causes troubles. Especially in the case of an enlarged head connected to the lower end of the earth auger, the connecting portion of the earth auger The structure was complicated, and the drawback of connecting and disconnecting the earth auger was great.
そこで、油圧シリンダに圧力油を供給するのみの１流路の油圧管路を配管し、油圧シリンダの戻りの駆動は土圧等の他の外力を利用して行うものが提案された。 In view of this, it has been proposed to provide a single hydraulic line that only supplies pressure oil to the hydraulic cylinder, and to drive the return of the hydraulic cylinder using other external forces such as earth pressure.
しかし、後者の提案による１流路型駆動回路では、配管構造が１流路の簡単なものとなる利点が得られるが、油圧シリンダの戻り駆動に確実さが欠ける難点が残されていた。 However, the one-channel type drive circuit according to the latter proposal has an advantage that the piping structure is simple with one channel, but there remains a problem that the return drive of the hydraulic cylinder is not reliable.
本願第１発明は、各種作業機器を駆動する油圧シリンダに対し、外部から圧力油を供給する１流路の油圧管路を備える簡単な構造を保持しつつ、油圧シリンダに対し、あたかも２流路の如く圧力油を供給して伸縮駆動させる構造簡単な油圧シリンダの駆動回路を提供することを課題とする。 The first invention of the present application is as if there are two flow paths for the hydraulic cylinder while maintaining a simple structure including a single hydraulic path for supplying pressure oil from the outside to the hydraulic cylinder for driving various working devices. It is an object of the present invention to provide a hydraulic cylinder drive circuit having a simple structure in which the pressure oil is supplied and extended and driven.
本願第２発明は、掘削作業ロッドに装備された油圧シリンダ駆動式拡大ヘッドにおいて、１流路の油圧管路から供給される圧力油をもって、あたかも２流路の如く油圧シリンダに圧力油を供給して駆動する拡大ヘッドを提供することを課題とする。 In the second invention of the present application, in the hydraulic cylinder drive type expansion head equipped on the excavation work rod, the pressure oil is supplied to the hydraulic cylinder as if there were two flow paths with the pressure oil supplied from the hydraulic pipe of one flow path. It is an object of the present invention to provide an enlargement head that is driven by the motor.
本願第３発明は、上記第２発明の拡大ヘッドにおいて、油圧シリンダの戻りの圧力油を地中に排出せずに、再使用を可能にすることを課題とする。 The third invention of the present application has an object to enable reuse in the expansion head of the second invention, without discharging the pressure oil returned from the hydraulic cylinder into the ground.
上記課題解決の手段として、本願第１発明は、
油圧シリンダにより駆動される作業機器において、
外部から圧力油を供給すべく１流路の油圧管路を上記油圧シリンダがわへ延長し、延長端から、流路切換弁を介して、上記油圧シリンダのロッド側スペースと、ピストン側スペースとにそれぞれ接続された管路を分岐し、
上記１流路に外部から供給される圧力油の圧力変化により、上記流路切換弁を切換えて、圧力油を上記油圧シリンダのロッド側スペース及びピストン側スペースの一方へ選択的に供給可能とした、
１流路型油圧シリンダの駆動回路を提案する。
As means for solving the above problems, the first invention of the present application is:
In work equipment driven by a hydraulic cylinder,
In order to supply pressure oil from the outside, the hydraulic cylinder of one flow path is extended to the side of the hydraulic cylinder, and the rod side space of the hydraulic cylinder, the piston side space, Branch the pipes connected to
By changing the pressure of the pressure oil supplied from the outside to the one flow path, the flow path switching valve is switched so that the pressure oil can be selectively supplied to one of the rod side space and the piston side space of the hydraulic cylinder. ,
A drive circuit for a single-flow hydraulic cylinder is proposed.
本願第２発明は、
ヘッドロッドの外側部に拡大翼を拡縮揺動自在に支持すると共に、ヘッドロッド内に油圧シリンダを内装し、該油圧シリンダの伸縮駆動にて上記拡大翼を拡縮させる拡大ヘッドにおいて、
外部から圧力油を供給すべく１流路の油圧管路を上記油圧シリンダがわへ延長し、延長端から、流路切換弁を介して、上記油圧シリンダのロッド側スペースと、ピストン側スペースとにそれぞれ接続された管路を分岐し、
上記１流路に外部から供給される圧力油の圧力変化により、上記流路切換弁を切換えて、圧力油を上記油圧シリンダのロッド側スペース及びピストン側スペースの一方へ選択的に供給可能とした、
１流路型油圧シリンダの駆動式拡大ヘッドを提案し、
The second invention of the present application is
In the enlargement head that supports the enlargement blade on the outer side of the head rod so that the enlargement / reduction can swing freely, and includes a hydraulic cylinder inside the head rod, and expands / contracts the enlargement blade by the extension / contraction drive of the hydraulic cylinder,
In order to supply pressure oil from the outside, the hydraulic cylinder of one flow path is extended to the side of the hydraulic cylinder, and the rod side space of the hydraulic cylinder, the piston side space, Branch the pipes connected to
By changing the pressure of the pressure oil supplied from the outside to the one flow path, the flow path switching valve is switched so that the pressure oil can be selectively supplied to one of the rod side space and the piston side space of the hydraulic cylinder. ,
We proposed a drive-type expansion head for a single-path hydraulic cylinder,
本願第３発明は、
上記油圧シリンダの一方のスペースへの圧力油供給時に、他方のスペースから出る戻り油を排出管路を通じて受け入れる開閉プラグつき戻り油貯留室をさらに設けた、
１流路型油圧シリンダ駆動式拡大ヘッドを提案する。
The third invention of the present application is
A return oil storage chamber with an open / close plug for receiving return oil from the other space through the discharge pipe when pressure oil is supplied to one space of the hydraulic cylinder;
A one-pass hydraulic cylinder drive expansion head is proposed.
本願第１発明の１流路型油圧シリンダの駆動回路によれば、外部から圧力油を供給する１流路の油圧管路を備えることにより、簡単な構造を維持することができ、しかも外部から供給する圧力油の圧力変化により、圧力油を油圧シリンダのロッド側スペースとピストン側スペースのいずれか一方へ選択的に供給して、あたかも２流路型のように油圧シリンダを確実に伸縮駆動させ、作業機器を確実に作動させることができるのである。 According to the drive circuit for the single-flow hydraulic cylinder of the first invention of the present application, a simple structure can be maintained by providing a single-flow hydraulic line for supplying pressure oil from the outside, and from the outside. Pressure oil is selectively supplied to either the rod-side space or the piston-side space of the hydraulic cylinder according to the pressure change of the supplied pressure oil, and the hydraulic cylinder is driven to expand and contract as if it were a two-channel type. Thus, the work equipment can be operated reliably.
本願第２発明の１流路型油圧シリンダ駆動式拡大ヘッドによれば、外部から圧力油を供給する１流路の油圧管路を備えることにより、簡単な構造を維持することができ、しかも外部から供給する圧力油をその圧力変化により油圧シリンダのロッド側スペースとピストン側スペースの一方へ選択的に供給することにより、あたかも２流路型のように油圧シリンダを確実に伸縮駆動させ、拡大翼を確実に拡縮できるのである。 According to the one-flow-type hydraulic cylinder drive type expansion head of the second invention of this application, a simple structure can be maintained by providing a one-flow-line hydraulic pipe for supplying pressure oil from the outside, and the external The pressure oil supplied from the cylinder is selectively supplied to either the rod-side space or the piston-side space of the hydraulic cylinder according to the pressure change, so that the hydraulic cylinder can be reliably expanded and contracted as if it were a two-channel type. Can be reliably scaled.
本願第３発明の１流路型油圧シリンダ駆動式拡大ヘッドによれば、上記第２発明の効果に加え、油圧シリンダからの戻りの圧力油を地中に排出することなく、貯留室に貯油することができ、それにより地中の造成物に障害を与えるようなことはなく、しかも貴重な作動油を清浄なまま貯留室から取り出して再使用に向けることができるようになり、経済的に極めて有利となる。 According to the one-flow-type hydraulic cylinder drive type expansion head of the third invention of the present application, in addition to the effect of the second invention, the return pressure oil from the hydraulic cylinder is stored in the storage chamber without being discharged into the ground. It is possible to remove valuable hydraulic oil from the storage chamber and reuse it for reuse, without causing any damage to the underground composition. It will be advantageous.
以下、本願発明の１流路型油圧シリンダ駆動式拡大ヘッドの例について説明する。図１の拡大ヘッド（１）において、そのヘッドロッドは、中空円筒状の主ロッド（２）の上端部に、同じく中空円筒状の副ロッド（３）をオス、メス継手により同一軸心線上に接続してあり、その主ロッド（２）下端部外側の直径方向相対する位置に形成されたブラケット（４）、（４）に、２本の拡大翼（５）、（５）の各基端部を軸（６）、（６）によりヘッドロッド縦断平面上で羽はばき状に揺動できるようにそれぞれ軸支してある。 Hereinafter, an example of the one-flow-path hydraulic cylinder driving type expansion head of the present invention will be described. In the enlarged head (1) of FIG. 1, the head rod is arranged on the same axial center line by the upper end of the hollow cylindrical main rod (2), and the same hollow cylindrical sub rod (3) by male and female joints. Connected to the brackets (4) and (4) formed at positions opposite to the diametrical direction outside the lower end of the main rod (2), the base ends of the two enlarged wings (5) and (5) The wings are pivotally supported by shafts (6) and (6) so that the wings can swing in a fluttering manner on the longitudinal plane of the head rod.
上記拡大翼（５）、（５）を駆動すべき油圧シリンダのチューブ（７）は、上記主ロッド（２）の下部中空内に固定されており、このチューブ（７）の上端板に上端を固定された中空ロッド（８）を、上記チューブ（７）下端板ついで主ロッド（２）を貫通して下方へ突出し、突出下端に、二重らせん羽根からなる掘削ヘッド（９）のボス（１０）を固定支持させ、この中空ロッド（８）に摺動自在に被嵌されたピストン（１１）を上記チューブ（７）内に摺動自在に嵌合すると共に、ピストンロッド（１２）を上記中空ロッド（８）に摺動自在に被嵌して主ロッド（２）から下方へ突出させ、突出部分に固定されたブラケット（１３）、（１３）にリンク（１４）、（１４）の一端を回転自在に連結すると共に、リンク（１４）、（１４）の他端を上記拡大翼（５）、（５）の中間部に回転自在に連結してある。 The tube (7) of the hydraulic cylinder that should drive the expansion blades (5) and (5) is fixed in the lower hollow of the main rod (2), and the upper end of the tube (7) has an upper end. The fixed hollow rod (8) passes through the lower end plate of the tube (7) and then passes through the main rod (2) and protrudes downward, and at the lower end of the protrusion, the boss (10) of the excavation head (9) consisting of double spiral blades. ) Is fixedly supported, and the piston (11) slidably fitted to the hollow rod (8) is slidably fitted into the tube (7), and the piston rod (12) is slidably fitted to the hollow rod (8). The rod (8) is slidably fitted and protrudes downward from the main rod (2). One end of the link (14), (14) is attached to the bracket (13), (13) fixed to the protruding portion. It is connected freely and links (14), (14) The larger wing and the other end (5), are rotatably connected to the intermediate portion (5).
それにより上記ピストン（１１）を昇降駆動すれば、拡大翼（５）、（５）が図１（イ）の閉縮位置と、同図（ロ）の拡開位置とに拡縮揺動する。 Accordingly, when the piston (11) is driven up and down, the expansion blades (5) and (5) swing up and down between the closed position in FIG. 1 (a) and the expanded position in FIG.
上記油圧シリンダがわへ、外部の油圧源から油圧ポンプにより圧力油を供給する１流路の油圧管路（１５）が上記副ロッド（３）内まで延長され、その延長端に、該油圧管路（１５）を経て供給される圧力油の圧力変化により切換作動する流路切換弁（１６）、上記油圧シリンダチューブ（７）のロッド側スペース及びピストン側スペースの一方へ選択的に圧力油を供給する切換管路（１７）、（１８）、油圧シリンダチューブ（７）の他方のスペースからの戻り油を貯留室（２０）へ案内する戻り油案内管路（１９）等を含む油圧シリンダの駆動回路（Ｐ）をロッド（２）、（３）内に内装してある。 A one-way hydraulic pipe (15) for supplying pressure oil from an external hydraulic source to the hydraulic cylinder by a hydraulic pump is extended into the auxiliary rod (3), and the hydraulic pipe is connected to the extended end of the hydraulic pipe. Pressure oil is selectively applied to one of the rod-side space and the piston-side space of the hydraulic cylinder tube (7), the flow path switching valve (16) that is switched by the pressure change of the pressure oil supplied through the passage (15). The hydraulic cylinders including the switching oil lines (17) and (18) to be supplied and the return oil guide line (19) for guiding the return oil from the other space of the hydraulic cylinder tube (7) to the storage chamber (20). The drive circuit (P) is housed inside the rods (2) and (3).
上記戻り油貯留室（２０）は、図１（イ）に示すように副ロッド（３）内に設けられ、その下端部に油を取り出すための開閉プラグ（２１）を設けてある。 The return oil storage chamber (20) is provided in the sub rod (3) as shown in FIG. 1 (a), and an open / close plug (21) for taking out oil is provided at the lower end thereof.
上記駆動回路（Ｐ）の詳細を図２に示す。今、便宜上１流路の油圧管路（１５）に供給される圧力油に、低圧：ａメガパスカル、中圧：ｂメガパスカル、高圧：ｃメガパスカルの３種を用意し、それに対応して流路切換弁（１６）のスプリングをｂメガパスカルに相当する強さ、リリーフ弁（２２）のスプリングをｃメガパスカルに相当する強さとする。 The details of the drive circuit (P) are shown in FIG. For convenience, three types of low pressure: a megapascal, medium pressure: b megapascal, and high pressure: c megapascal are prepared for the pressure oil supplied to the one-way hydraulic pipe (15) for convenience. The spring of the flow path switching valve (16) has a strength corresponding to b megapascal, and the spring of the relief valve (22) has a strength corresponding to c megapascal.
まず、図２（イ）のようにａメガパスカルの圧力油を油圧管路（１５）に供給すると、該圧力油は流路切換弁（１６）の図示のポート、ついで切換管路（１７）を経て油圧シリンダチューブ（７）のロッド側スペースに送られ、それによりピストン（１１）を上昇させ、該ピストン（１１）の上昇が図１のリンク（１４）、（１４）を介して拡大翼（５）、（５）を拡開させる。その際、油圧シリンダチューブ（７）のピストン側スペースにある圧力油は、管路（２３）、開いたパイロットチェック弁（２４）、ついで戻り油案内管路（１９）を経て戻り油貯留室（２０）に送られ、貯留される。 First, as shown in FIG. 2 (a), when a mega Pascal pressure oil is supplied to the hydraulic line (15), the pressure oil is supplied to the illustrated port of the flow path switching valve (16), and then to the switching line (17). 1 is sent to the rod side space of the hydraulic cylinder tube (7), thereby raising the piston (11), and the rising of the piston (11) is expanded via the links (14) and (14) of FIG. (5) Expand (5). At that time, the pressure oil in the piston side space of the hydraulic cylinder tube (7) passes through the pipe (23), the opened pilot check valve (24), and then the return oil guide pipe (19) to return oil storage chamber ( 20) and stored.
次に、ａメガパスカルに代え、ｂメガパスカルの圧力油を油圧管路（１５）に供給する
と、流路切換弁（１６）のポートを（ロ）図のポートに切換える。
Next, when b-megapascal pressure oil is supplied to the hydraulic line (15) instead of the a-megapascal, the port of the flow path switching valve (16) is switched to the port shown in (b).
そこで、ｂメガパスカルに代え、ｃメガパスカルの圧力油を油圧管路（１５）に供給すると、（ハ）図のように該圧力油は流路切換弁（１６）の新たなポート、ついで切換管路（１８）、リリーフ弁（２２）を経て油圧シリンダチューブ（７）のピストン側スペースに送られ、それによりピストン（１１）を降下させ、該ピストン（１１）の降下が図１のリンク（１４）、（１４）を介して拡大翼（５）、（５）を閉縮させる。その際油圧シリンダチューブ（７）のロッド側スペースにある圧力油は、管路（２５）、開いたパイロットチェック弁（２６）ついで戻り油案内管路（１９）を経て貯留室（２０）に送られ、貯留される。 Therefore, when c-megapascal pressure oil is supplied to the hydraulic line (15) instead of b-megapascal, the pressure oil is switched to a new port of the flow path switching valve (16) as shown in FIG. It is sent to the piston side space of the hydraulic cylinder tube (7) through the pipe line (18) and the relief valve (22), thereby lowering the piston (11), and the lowering of the piston (11) is linked to the link ( 14) The enlarged wings (5) and (5) are closed via (14). At that time, the pressure oil in the rod side space of the hydraulic cylinder tube (7) is sent to the storage chamber (20) via the pipe line (25), the opened pilot check valve (26) and then the return oil guide pipe line (19). And stored.
上記拡大ヘッド（１）を掘削スクリューロッドの下端に接続して地盤に掘進し、所定深さにおいて、上記のような油圧操作により拡開した拡大翼（５）、（５）により拡大掘削を行いつつ、セメントミルクを孔内に注入して拡大球根を造成した後、上記のような拡大翼（５）、（５）を閉縮して地上に引き抜いたら、上記貯留室（２０）の開閉プラグ（２１）を開いて貯留された作動油を取り出し、これを油圧源に戻して再使用する。 The enlargement head (1) is connected to the lower end of the excavation screw rod to dig into the ground, and at a predetermined depth, enlargement excavation is performed with the enlargement blades (5) and (5) expanded by the hydraulic operation as described above. On the other hand, after the cement milk is injected into the hole to form the enlarged bulb, the above-described expansion wings (5), (5) are closed and pulled out to the ground. (21) is opened and the stored hydraulic fluid is taken out and returned to the hydraulic pressure source for reuse.
１ 拡大ヘッド
２ 主ロッド
３ 副ロッド
５ 拡大翼
７ 油圧シリンダチューブ
１５ １流路油圧管路
１６ 流路切換弁
１７、１８ 切換管路
１９ 戻り油案内管路
２０ 貯留室
２１ 開閉プラグ
DESCRIPTION OF SYMBOLS 1
Claims (3)
外部から圧力油を供給すべく１流路の油圧管路を上記油圧シリンダがわへ延長し、延長端から、流路切換弁を介して、上記油圧シリンダのロッド側スペースと、ピストン側スペースとにそれぞれ接続された管路を分岐し、
上記１流路に外部から供給される圧力油の圧力変化により、上記流路切換弁を切換えて、圧力油を上記油圧シリンダのロッド側スペース及びピストン側スペースの一方へ選択的に供給可能とした、
１流路型油圧シリンダの駆動回路。 In work equipment driven by a hydraulic cylinder,
In order to supply pressure oil from the outside, the hydraulic cylinder of one flow path is extended to the side of the hydraulic cylinder, and the rod side space of the hydraulic cylinder, the piston side space, Branch the pipes connected to
By changing the pressure of the pressure oil supplied from the outside to the one flow path, the flow path switching valve is switched so that the pressure oil can be selectively supplied to one of the rod side space and the piston side space of the hydraulic cylinder. ,
Drive circuit for a single-flow hydraulic cylinder.
外部から圧力油を供給すべく１流路の油圧管路を上記油圧シリンダがわへ延長し、延長端から、流路切換弁を介して、上記油圧シリンダのロッド側スペースと、ピストン側スペースとにそれぞれ接続された管路を分岐し、
上記１流路に外部から供給される圧力油の圧力変化により、上記流路切換弁を切換えて、圧力油を上記油圧シリンダのロッド側スペース及びピストン側スペースの一方へ選択的に供給可能とした、
１流路型油圧シリンダの駆動式拡大ヘッド。 In the enlargement head that supports the enlargement blade on the outer side of the head rod so that the enlargement / reduction can swing freely, and includes a hydraulic cylinder inside the head rod, and expands / contracts the enlargement blade by the extension / contraction drive of the hydraulic cylinder,
In order to supply pressure oil from the outside, the hydraulic cylinder of one flow path is extended to the side of the hydraulic cylinder, and the rod side space of the hydraulic cylinder, the piston side space, Branch the pipes connected to
By changing the pressure of the pressure oil supplied from the outside to the one flow path, the flow path switching valve is switched so that the pressure oil can be selectively supplied to one of the rod side space and the piston side space of the hydraulic cylinder. ,
Drive-type expansion head for one-flow hydraulic cylinder.
１流路型油圧シリンダ駆動式拡大ヘッド。 A return oil storage chamber with an open / close plug for receiving return oil from the other space through the discharge pipe when pressure oil is supplied to one space of the hydraulic cylinder;
1-channel hydraulic cylinder drive expansion head.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930991A (en) * | 2017-03-20 | 2017-07-07 | 安徽机电职业技术学院 | Building-block machine Hydraulic Power Transmission System |
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| JPS608504A (en) * | 1983-05-31 | 1985-01-17 | ジエイ・エツチ・フエナ−・アンド・カンパニ−・リミテツド | Valve |
| JP2003184812A (en) * | 2001-12-18 | 2003-07-03 | Kayaba Ind Co Ltd | Hydraulic control device |
| JP2006200285A (en) * | 2005-01-24 | 2006-08-03 | Sanwa Kizai Co Ltd | Expansion head of excavating rod |
| JP2008190137A (en) * | 2007-02-01 | 2008-08-21 | Nippon Steel Corp | Fluid pressure cylinder-type expansion head with built-in accumulator, and expansion blade holding method using the head |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS513030A (en) * | 1974-06-26 | 1976-01-12 | Kawasaki Heavy Ind Ltd | RYUTAIKIRIKAESOCHI |
| JPS5813981U (en) * | 1981-07-15 | 1983-01-28 | 東向鉄工株式会社 | Reciprocating device |
| JPS608504A (en) * | 1983-05-31 | 1985-01-17 | ジエイ・エツチ・フエナ−・アンド・カンパニ−・リミテツド | Valve |
| JP2003184812A (en) * | 2001-12-18 | 2003-07-03 | Kayaba Ind Co Ltd | Hydraulic control device |
| JP2006200285A (en) * | 2005-01-24 | 2006-08-03 | Sanwa Kizai Co Ltd | Expansion head of excavating rod |
| JP2008190137A (en) * | 2007-02-01 | 2008-08-21 | Nippon Steel Corp | Fluid pressure cylinder-type expansion head with built-in accumulator, and expansion blade holding method using the head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930991A (en) * | 2017-03-20 | 2017-07-07 | 安徽机电职业技术学院 | Building-block machine Hydraulic Power Transmission System |
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