JPS61282522A - Oil-pressure operator for back hoe - Google Patents
Oil-pressure operator for back hoeInfo
- Publication number
- JPS61282522A JPS61282522A JP12319285A JP12319285A JPS61282522A JP S61282522 A JPS61282522 A JP S61282522A JP 12319285 A JP12319285 A JP 12319285A JP 12319285 A JP12319285 A JP 12319285A JP S61282522 A JPS61282522 A JP S61282522A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- operating
- arm
- confluence
- detector
- 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
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
Description
【発明の詳細な説明】
゛ (産業上の利用分野〕
本発明は、旋回台又は作業用アームを回動操作する回動
操作弁のセンターバイパスを、前記作業用アームの上下
揺動操作弁に圧油合流させる合流管路を設けてあるバッ
クホーの油圧操作部に関する。[Detailed description of the invention] ゛ (Industrial field of application) The present invention provides a center bypass of a rotation operation valve for rotating a swivel table or a working arm to a vertical swing operation valve of the working arm. The present invention relates to a hydraulic operating section of a backhoe that is provided with a merging pipe line for merging pressure oil.
従来、上記油圧操作部では、前記回動操作弁と上下揺動
操作弁とを、アームの操′作中に旋回台又は作業用アー
ムを同時回動操作する場合にも、回動操作弁からの圧油
が合流管路で合流するように油路接続してあった。Conventionally, in the hydraulic operation unit, the rotation operation valve and the vertical swing operation valve are operated from the rotation operation valve even when the swivel table or the work arm is simultaneously rotated while the arm is being operated. The oil lines were connected so that the two pressurized oils met at the confluence pipe.
しかし、アームの作動時には、合流管路の圧力が高くな
り、旋回台又は作業用アームを操作すれば動作速度が速
くなり、危険性を増したり、微少操作時におけるインチ
ング操作性が悪くなったりする虞があった。However, when the arm is operated, the pressure in the confluence pipe becomes high, and when the swivel table or working arm is operated, the operating speed becomes faster, increasing the danger and worsening the inching operability during minute operations. There was a risk.
本発明の目的は、アームの作動時に旋回台又は作業用ア
ームの動作速度が速くならないようにする点にある。An object of the present invention is to prevent the operating speed of the swivel base or working arm from increasing when the arm is operated.
本発明におけるバックホーの油圧操作部の特徴構成は、
回動操作弁に対する操作レバーの操作を検出する検出器
を設け、前記検出器からの情報に基づいて前記操作レバ
ーの操作時に、上下揺動操作弁への圧油合流を断つ合流
遮断弁を合流管路に設けてあることにあり、その作用効
果は、次の通りである。The characteristic configuration of the hydraulic operation section of the backhoe in the present invention is as follows:
A detector is provided to detect the operation of the operating lever for the rotation operating valve, and a merging cutoff valve is installed to cut off the flow of pressure oil to the vertical swing operating valve when the operating lever is operated based on information from the detector. The function and effect are as follows.
つまり、上下揺動操作弁を操作するアーム操作中に、旋
回台又は作業用アームの回動操作弁を操作レバーで操作
すれば、合流管路中に設けてある合流遮断弁により上下
揺動操作弁への圧油合流が断たれるために、合流管路の
圧力は高くならず、旋回台又は作業用アームの回動速度
は安定し、速くなることない。In other words, if the rotation operation valve of the swivel table or work arm is operated with the operation lever while the arm is operating the vertical swing operation valve, the vertical swing operation will be performed by the merging cutoff valve installed in the merging pipe. Since the flow of pressure oil to the valve is cut off, the pressure in the merge line does not increase, and the rotational speed of the swivel table or working arm remains stable and does not increase.
従って、旋回台又は作業用アームを、安定して回動させ
られると共に、微少操作時におけるインチング操作性も
良好に維持され、安全性及び良好な操作性を維持できる
に至った。Therefore, the swivel table or the working arm can be rotated stably, and the inching operability during minute operations can be maintained well, making it possible to maintain safety and good operability.
〔実施例〕 次に実施例を示す。〔Example〕 Next, examples will be shown.
第2図に示すように、クローラ式走行装置(1)に旋回
台(2)とドーザ装置(3)を取付け、バックホー装置
(4)、搭乗運転部(5)及び原動部(6)を旋回台(
2)に取付け、排土作業も可能な小型バックホ一作業車
を構成しである。As shown in Figure 2, a swivel platform (2) and a dozer device (3) are attached to a crawler type traveling device (1), and a backhoe device (4), boarding and driving section (5), and driving section (6) are rotated. stand (
2) It consists of a small backhoe and a work vehicle that can be attached to a vehicle and used for soil removal work.
走行装置(1)、旋回台(2)、ドーザ装置(3)、バ
ックホー装置(4)等を駆動する油圧回路を、第1図に
より以下に詳述する。A hydraulic circuit for driving the traveling device (1), the swivel table (2), the dozer device (3), the backhoe device (4), etc. will be described in detail below with reference to FIG.
原動部(6)に第1ないし第3ポンプ(Pυ、 (pg
) 。The first to third pumps (Pυ, (pg
).
(P9)を同一エンジンに連動して配置し、左右一方の
クローラに対する油圧モータ(Ml)の第1走行用操作
弁(V9)、ブーム用油圧シリンダ(C1)の操作弁(
Vz)、パケット用油圧シリンダ(C8)の操作弁(V
9)を、その順に並べたセンターバイパス付多連弁型式
にして第1ポンプ(P9)に並列接続しである。左右他
方のクローラに対する油圧モータ(Mg)の第2走行用
操作弁(V4)、ブーム増連用操作弁(V9)、合流用
スペーサ(7)、アーム用油圧シリンダ(C1)の上下
揺動操作弁(V9)、サービスポート(8)用操作弁(
V?)を、その順に並べたセンサーバイパス付多連弁型
式にして第2ポンプ(P2)に並列接続し、また、バッ
クホー装置(4)を旋回台(2)に対して左右揺動させ
るスイング用油圧シリンダ(C4)の回動操作弁(V9
)、旋回台用油圧モータ(Mりの回動操作弁(V9)、
ドーザ用油圧シリンダ(C2)の操作弁(Vl+1)を
、その順に並べたセンターバイパス付多連弁型式にして
第3ポンプ(P3)に並列接続しである。(P9) are arranged in conjunction with the same engine, and the first traveling operation valve (V9) of the hydraulic motor (Ml) for the left and right crawlers, and the operation valve (V9) of the boom hydraulic cylinder (C1)
Vz), the operation valve (V
9) are connected in parallel to the first pump (P9) in a multiple valve type with center bypass arranged in that order. The second traveling operation valve (V4) of the hydraulic motor (Mg) for the left and right crawlers, the boom expansion operation valve (V9), the merging spacer (7), and the vertical swing operation valve of the arm hydraulic cylinder (C1) (V9), operation valve for service port (8) (
V? ) are connected in parallel to the second pump (P2) in the form of multiple valves with sensor bypass arranged in that order. Rotary operation valve (V9) of cylinder (C4)
), hydraulic motor for swivel table (M-type rotary operation valve (V9),
The operation valve (Vl+1) of the dozer hydraulic cylinder (C2) is arranged in the order of the multiple valve type with center bypass and connected in parallel to the third pump (P3).
左右クローラ用油圧モータ(MO,0+2>を第1及び
第2ポンプ(Pυ、(h)に対して各別接続する低速状
態と、両ポンプ(P+)、 (Pt)からの圧油を合流
して両地圧モータ(L)、(1’h)に直列供給する高
速状態に切換えるための変速用バルブ(9)を設けてあ
る。The left and right crawler hydraulic motors (MO, 0+2> are connected separately to the first and second pumps (Pυ, (h)) in a low-speed state, and the pressure oil from both pumps (P+) and (Pt) is combined. A speed change valve (9) is provided for switching to a high speed state where the ground pressure motors (L) and (1'h) are supplied in series.
スイング用、旋回台用及びドーザ用の操作弁(Vs)
、 (V9) 、 (V+。)を含む多連弁のセンター
バイパス(11)を、第2ポンプ(P2)に接続した合
流用スペーサ(7)に合流管路(12)で接続して、作
業用アーム(15)及び旋回台(2)の回動、並びにド
f装置(3)が停止されている時に、アーム(15)あ
るいはサービスポート(8)に接続したアタッチメント
を第2及び第3ポンプ(h) 、(P3)からの圧油で
高速駆動できるように構成しである。Operation valve (Vs) for swing, swivel and dozer
, (V9), and (V+.) are connected to the merging spacer (7) connected to the second pump (P2) by the merging pipe line (12), and the work is carried out by connecting the center bypass (11) of the multiple valve including When the arm (15) and the swivel table (2) are rotated, and when the def device (3) is stopped, the attachment connected to the arm (15) or the service port (8) is (h) It is constructed so that it can be driven at high speed using the pressure oil from (P3).
第1ないし第3ポンプ(P9)ないしくP9)に各別に
接続されたメインリリーフ回路(10) 、 (13)
。Main relief circuits (10) and (13) connected to the first to third pumps (P9) and (P9) respectively
.
(14)のリリーフ圧を、高圧にかつ夫々適当な値に設
定し、通常のバックホ一作業やドーザ作業時の過負荷に
よるエンジン停止を防止するように構成しである。尚、
第1図中、(17)はカウンタバランスバルブ、(1B
)はブレーキバルブ、(19)はオイルタンク、(20
)は戻り油路、(21)はスペーサ内蔵の逆止弁である
。The relief pressure (14) is set at a high pressure and at an appropriate value to prevent the engine from stopping due to overload during normal backhoe work or dozer work. still,
In Figure 1, (17) is a counterbalance valve, (1B
) is the brake valve, (19) is the oil tank, (20
) is a return oil path, and (21) is a check valve with a built-in spacer.
そして、前記旋回台(2)の回動操作弁(V9)に対す
る操作レバー(22)の操作を検出するリミットスイッ
チから成る検出器(23)を設け、検出器(23)から
の情報に基づいて操作レバー(22)の操作時に、上下
揺動操作弁(V9)への圧油合流を断つ電磁切換弁から
成る合流遮断弁(24)が、合流 □管路(12)に設
けられており、作業用アーム(15)の上下揺動操作時
に、旋回操作のために回動操作弁(V9)を中開度にし
た時、合流管路(12)の油圧が上昇しないように構成
しである。A detector (23) consisting of a limit switch is provided to detect the operation of the operating lever (22) for the rotary operating valve (V9) of the swivel base (2), and based on the information from the detector (23), A merging cutoff valve (24) consisting of an electromagnetic switching valve that cuts off the flow of pressure oil to the vertical swing operating valve (V9) when the operating lever (22) is operated is provided in the merging line (12), When the working arm (15) is operated to swing up and down, when the rotation operation valve (V9) is set to a medium opening degree for the rotation operation, the hydraulic pressure in the merging pipe (12) is configured so as not to increase. .
前記検出器(23)は、旋回台用の回動操作弁(V9)
の操作レバー(22)の操作を検出するの゛に代え、ス
イング用回動操作弁(ν8)の操作レバーの操作を検出
するものであっても良い。The detector (23) is a rotary operation valve (V9) for a rotating base.
Instead of detecting the operation of the operation lever (22), the operation of the operation lever of the swing rotary operation valve (v8) may be detected.
本発明のバックホーは、旋回自動停止機構を有するもの
であっても良く、この場合は、旋回台(2)用回動操作
弁(V9)又はスイング用回動操作弁(V9)を操作す
る電磁比例弁への指令電圧を、検出器(23)により検
出させ、電磁弁へ指令電圧が与えられている場合に、合
流遮断弁(24)が作動するように構成する。The backhoe of the present invention may have an automatic rotation stop mechanism, and in this case, an electromagnetic device that operates the rotation operation valve (V9) for the rotation platform (2) or the rotation operation valve (V9) for the swing The command voltage to the proportional valve is detected by a detector (23), and when the command voltage is applied to the electromagnetic valve, the merging cutoff valve (24) is configured to operate.
図面は本発明に係るバックホーの油圧操作部の実施例を
示し、第1図は概略油圧回路図、第2図はバックホ一作
業車の全体側面図である。
(2)・・・・・・旋回台、(12)・・・・・・合流
管路、(15)・・・・・・作業用アーム、(22)・
・・・・・操作レバー、(23)・・・・・・検出器、
(24)・・・・・・合流遮断弁、(V9)・・・・・
・上下揺動操作弁、(V9) 、 (Vs)・・・・・
・回動操作弁。The drawings show an embodiment of a hydraulic operating section of a backhoe according to the present invention, and FIG. 1 is a schematic hydraulic circuit diagram, and FIG. 2 is an overall side view of a backhoe working vehicle. (2)... Swivel base, (12)... Merging pipe, (15)... Working arm, (22)...
...operation lever, (23) ...detector,
(24)...Merge cutoff valve, (V9)...
・Vertical swing operation valve, (V9), (Vs)...
・Rotary operation valve.
Claims (1)
回動操作弁(V_9)又は(V_8)のセンターバイパ
スを、前記作業用アーム(15)の上下揺動操作弁(V
_6)に圧油合流させる合流管路(12)を設けてある
バックホーの油圧操作部であって、前記回動操作弁(V
_9)又は(V_8)に対する操作レバー(22)の操
作を検出する検出器(23)を設け、前記検出器(23
)からの情報に基づいて前記操作レバー(22)の操作
時に、前記上下揺動操作弁(V_6)への圧油合流を断
つ合流遮断弁(24)を前記合流管路(12)に設けて
あるバックホーの油圧操作部。The center bypass of the rotation operating valve (V_9) or (V_8) for rotating the swivel table (2) or the working arm (15) is connected to the vertical swing operating valve (V_8) of the working arm (15).
A hydraulic operation part of a backhoe which is provided with a merging pipe (12) for merging pressure oil into the rotary operation valve (V).
A detector (23) is provided to detect the operation of the operating lever (22) for (V_9) or (V_8), and the detector (23)
) A merging cutoff valve (24) is provided in the merging pipe (12) that cuts off the flow of pressure oil to the vertical swing operating valve (V_6) when the operating lever (22) is operated based on information from the merging pipe (12). The hydraulic control section of a backhoe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12319285A JPS61282522A (en) | 1985-06-06 | 1985-06-06 | Oil-pressure operator for back hoe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12319285A JPS61282522A (en) | 1985-06-06 | 1985-06-06 | Oil-pressure operator for back hoe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61282522A true JPS61282522A (en) | 1986-12-12 |
Family
ID=14854468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12319285A Pending JPS61282522A (en) | 1985-06-06 | 1985-06-06 | Oil-pressure operator for back hoe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61282522A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008256208A (en) * | 2007-03-30 | 2008-10-23 | Volvo Construction Equipment Ab | Construction equipment hydraulic circuit |
JP2010013927A (en) * | 2008-07-02 | 2010-01-21 | Volvo Construction Equipment Ab | Hydraulic drive system for excavator |
-
1985
- 1985-06-06 JP JP12319285A patent/JPS61282522A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008256208A (en) * | 2007-03-30 | 2008-10-23 | Volvo Construction Equipment Ab | Construction equipment hydraulic circuit |
JP2010013927A (en) * | 2008-07-02 | 2010-01-21 | Volvo Construction Equipment Ab | Hydraulic drive system for excavator |
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