JPS59118930A - Operational speed controller for double-acting working part - Google Patents
Operational speed controller for double-acting working partInfo
- Publication number
- JPS59118930A JPS59118930A JP22553182A JP22553182A JPS59118930A JP S59118930 A JPS59118930 A JP S59118930A JP 22553182 A JP22553182 A JP 22553182A JP 22553182 A JP22553182 A JP 22553182A JP S59118930 A JPS59118930 A JP S59118930A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- control valve
- pressure
- flow rate
- double
- 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.)
- Pending
Links
Classifications
-
- 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
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、トラクタに装着される例えばフロントロー
ダやロータリの如き作業機に装備されている作動シリン
ダの如き複動式作動部の動作速度制御装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating speed control device for a double-acting operating part such as an operating cylinder installed in a working machine such as a front loader or rotary mounted on a tractor.
トラクタに装着したこれらの作業機をトラクタの油圧装
置によって駆動することが最近多く行われるよう罠なっ
ているが、この油圧装置は、元来作業機昇降機構を作動
する為のものであるので、油圧と流量は充分に大きいも
のである。従って作業機の作動部が小容量であるときは
、油圧装置の流量が多過ぎる結果、作動部の動作速度が
速過ぎて微動操作ができなくなり、操作がむつかしいこ
とKなる。そしてこの対策として、トラクタの油圧装置
に流量調整装置を設けてここで流量を調整したうえ、各
作動部に供給することが考えられるが、油圧供給系が多
岐であるので、夫々の作動部に適した流量調整を1個所
で行うことは構造が極めて複雑となって実施化がむつか
しいものである。Recently, it has become increasingly common for these working machines attached to tractors to be driven by the tractor's hydraulic system, but since this hydraulic system was originally used to operate the working machine lifting mechanism, The oil pressure and flow rate are sufficiently large. Therefore, when the operating section of the work machine has a small capacity, the flow rate of the hydraulic system is too large, and as a result, the operating speed of the operating section is too fast, making it impossible to perform fine movement operations, making the operation difficult. As a countermeasure to this problem, it is possible to install a flow rate adjustment device in the tractor's hydraulic system to adjust the flow rate and then supply it to each operating part, but since there are many different hydraulic supply systems, Performing suitable flow rate adjustment at one location requires an extremely complicated structure and is difficult to implement.
又、単純なオリフィス等を用いて強制的に流量を絞る方
法もあるが、油圧ポンプの吐出側に高い抵抗が作用する
ので油圧ポンプが過負荷となる等の問題がある。There is also a method of forcibly restricting the flow rate using a simple orifice or the like, but this creates problems such as overloading the hydraulic pump because high resistance acts on the discharge side of the hydraulic pump.
そこでこの発明においては、トラクタに装着される作業
機の複動式作動部と、この作動部に圧力油を給排制御す
る切替弁との間に流量制御弁を設け、この流量制御弁は
、一定に設定される圧力を蛸えて流入する圧力油によっ
て逃がし部が開口してこの圧力油の油圧を下降させるよ
う虻、而も、上記圧力油の流入方向を可逆に′WIt成
して、作業部に最も適した流量を、構造の簡易な流量制
御弁によって供給できるように工夫したものである。Therefore, in this invention, a flow control valve is provided between a double-acting operating section of a working machine mounted on a tractor and a switching valve that controls the supply and discharge of pressure oil to this operating section. The relief part is opened by the pressure oil flowing in while maintaining a constant pressure, and the hydraulic pressure of this pressure oil is lowered. The system is designed to supply the most suitable flow rate to each area using a flow control valve with a simple structure.
そして具体的構造を図示の一実施例疋基づいて説明すれ
ば、第1図に例示した油圧回路は、トラクタに装着して
いるフロントローダのリフトアームを起伏動作するリフ
トシリンダ(1)とそのリフトピストン(1a)を複動
式作動部(2)とするものであって、トラクタに装備さ
れている油圧ポンプ(3)の圧力油を、リリーフ弁(4
)によって調圧して複動式の切替弁(5)を介して油路
(6)又は油路(7)からリフトピストン(1a)の前
後に供給し、又はこれから排出できるように接続してい
る。そして、複動式作動部(2)と切替弁(5)との間
に流量制御弁(8)を接続して、この流量制御弁(8)
はポンプ(3)に接続される油路(6)の圧力がばね(
9)の力を越えると、弁O1が移動して油路(6)から
゛ 複動式作動部(2)の一方の油室
(2a)K流入すべき圧力油の一部は逃がし部01)を
通って油路(7)へ逃げることKなり、油路(7)が油
田ポンプ(3)に接続される状態ではこの油路(7)の
圧力がばね021の力を鍵えると、弁(1争が移動して
油路(7)から油路(6)への通路を開くので、他方の
油室(’2b) K流入すべき圧力油の一部は油路(6
)へ逃げるように構成している。To explain the specific structure based on an illustrated embodiment, the hydraulic circuit illustrated in FIG. The piston (1a) is a double-acting operating part (2), and the pressure oil of the hydraulic pump (3) installed on the tractor is supplied to the relief valve (4).
) and is connected so that it can be supplied to or discharged from the oil passage (6) or oil passage (7) before and after the lift piston (1a) via the double-acting switching valve (5). . A flow control valve (8) is connected between the double-acting actuator (2) and the switching valve (5), and the flow control valve (8)
The pressure in the oil line (6) connected to the pump (3) is caused by the spring (
When the force exceeds the force 9), the valve O1 moves and a part of the pressure oil that should flow into one oil chamber (2a) K of the double-acting actuating part (2) is transferred from the oil passage (6) to the relief part 01. ) to the oil passage (7), and when the oil passage (7) is connected to the oilfield pump (3), the pressure in this oil passage (7) can control the force of the spring 021. Since the valve (1) moves to open the passage from the oil passage (7) to the oil passage (6), a portion of the pressure oil that should flow into the other oil chamber ('2b) flows into the oil passage (6).
).
そしてこの流量制御弁(8)を製品化した一例を第2図
に示しているが、弁体04)の孔09に絞りOQのある
ポペットOn(第1南では弁(11、031に相当する
)を嵌入しているが、油圧ポンプ(3)が油路(6)に
接続されてこの油路「6)から圧力油が孔(19に流入
するときは、ばね(9)に抗してポペット〔ηが左方へ
移動して逃がし孔O1Oがボート(IIK連通ずること
になり、油路(6)の圧力油の一部が逃がし札止、ボー
)Qlを経て逃がし部fl +3 K逃げることになる
。又、油路(7)が油圧ポンプ(3)に接続されて油路
(7)から圧力油が流入するときは、ばねUK抗してポ
ペットaηが右方へ移動して逃がし孔0&がボート(イ
)に連通ずることになり、油路(7)の圧力油の一部が
逃がし孔081゜ボート■を経て逃がし部0υに逃げる
ことになる。An example of the commercialized flow control valve (8) is shown in Fig. 2, where the poppet On (1st south corresponds to the valve (11, 031) with a throttle OQ in the hole 09 of the valve body 04) ) is inserted, but when the hydraulic pump (3) is connected to the oil passage (6) and pressure oil flows from this oil passage ``6'' into the hole (19), it flows against the spring (9). The poppet [η moves to the left and the relief hole O1O is connected to the boat (IIK, so a part of the pressure oil in the oil passage (6) escapes through the relief part fl + 3K through the valve stop, bow) Ql. Also, when the oil passage (7) is connected to the hydraulic pump (3) and pressure oil flows in from the oil passage (7), the poppet aη moves to the right against the spring UK and closes the relief hole. 0 & will be in communication with the boat (A), and a part of the pressure oil in the oil passage (7) will escape to the relief part 0υ via the relief hole 081° boat ■.
そして、このよう忙油路(6)又は(7)の圧力油の一
部が図示のように他の作動部121+ (例えばフロン
トローダのパケット用シリンダ)の切替弁(’271.
作業機昇降機#IQ、1のコントロール弁r21J等を
経てタンク内に戻り、或いは図示は省略したが直接にタ
ンク(ハ)K戻るように構成しであるので、リフトシリ
ンダ(1)のリフトピストン(1a)に供給される圧力
油の油圧は低下すること罠なり、リフトピストン(1a
)の動作速度は減速されることKなる。Then, as shown in the figure, a part of the pressure oil in the busy oil passage (6) or (7) is transferred to a switching valve ('271.
The structure is such that it returns to the tank via the control valve r21J of the work equipment elevator #IQ, 1, etc., or directly to the tank (C)K (although not shown), so that the lift piston of the lift cylinder (1) The hydraulic pressure of the pressure oil supplied to the lift piston (1a) decreases, and the lift piston (1a)
) will be slowed down.
尚、N、!制御弁(8)は図示例のほか、上述と同様な
機能を有する他の構造のものを使用できるものである。Nao, N! In addition to the illustrated example, control valves (8) having other structures having the same functions as those described above may be used.
この発明に係る複動式作動部の動作速度制御装置は上述
のように構成したものであって、一定に設定される圧力
を越えて流入する圧力油によつ【逃がし部が開口してこ
の圧力油の油圧を下降させるように、そしてこの圧力油
の流入方向を可逆に構成しているので、複動式作動部を
その性質に適応した好適な動作速度にて作動することが
できて操作性を向上できるものであり、トラクタの形式
や油圧装胃の容量等に関係なく、常に好適な動作速度と
することができる。又、このよう忙作動部に附属するよ
う忙設けているので簡易な構造となり、而も、可逆タイ
プであるので、1@の流量制御弁にて足りることになっ
て安価に実用化できるものである。The operating speed control device for a double-acting operating section according to the present invention is constructed as described above, and is caused by pressure oil flowing in exceeding a preset pressure. Since the hydraulic pressure of the pressure oil is lowered and the inflow direction of this pressure oil is configured to be reversible, the double-acting operating part can be operated at a suitable operating speed that suits its properties. Therefore, it is possible to always maintain a suitable operating speed regardless of the type of tractor or the capacity of the hydraulic stomach. In addition, since it is attached to a busy operating part, the structure is simple, and since it is a reversible type, only one flow control valve is required, making it possible to put it into practical use at low cost. be.
図はこの発明の一実施例を示すもの寸、第1図は油圧回
路図、第2図は同上回路に使用される流量制御弁の断面
図である。
符号説明
(1)・・・リフトシリンダ (2)・・・複動式作
動部(3))・・・油圧ポンプ (4)・・・リ
リーフ弁(fi)・・・切替弁 (6)・・
・油路(8)・・・流量制御弁 (10・・・逃
がし部特許出願人 井関農機株式会社The figures show one embodiment of the present invention, FIG. 1 is a hydraulic circuit diagram, and FIG. 2 is a sectional view of a flow control valve used in the same circuit. Description of symbols (1)...Lift cylinder (2)...Double acting actuating part (3))...Hydraulic pump (4)...Relief valve (fi)...Switching valve (6)・
・Oil passage (8)...Flow rate control valve (10...Relief part Patent applicant Iseki Agricultural Machinery Co., Ltd.
Claims (1)
動部に圧力油を給排制御する切替弁との間に流量制御弁
を設け、この流量制御弁は、−宇に設定される圧力を越
えて流入する圧力油忙よって逃がし部が開口してこの圧
力油の油圧を下降させるように1而も、上記圧力油の流
入方向を可逆に構成したことを特徴とする複動式作動部
の動作速度制御装置。A flow control valve is provided between a double-acting operating section of a working machine mounted on a tractor and a switching valve that controls the supply and discharge of pressure oil to this operating section, and this flow control valve is set to -U. The double-acting type actuator is characterized in that the inflow direction of the pressure oil is configured to be reversible so that the pressure oil flowing in exceeding the pressure opens the relief part and lowers the oil pressure of the pressure oil. section operating speed control device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22553182A JPS59118930A (en) | 1982-12-22 | 1982-12-22 | Operational speed controller for double-acting working part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22553182A JPS59118930A (en) | 1982-12-22 | 1982-12-22 | Operational speed controller for double-acting working part |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59118930A true JPS59118930A (en) | 1984-07-09 |
Family
ID=16830756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22553182A Pending JPS59118930A (en) | 1982-12-22 | 1982-12-22 | Operational speed controller for double-acting working part |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59118930A (en) |
-
1982
- 1982-12-22 JP JP22553182A patent/JPS59118930A/en active Pending
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