JP3688950B2 - Swivel excavator - Google Patents

Swivel excavator Download PDF

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Publication number
JP3688950B2
JP3688950B2 JP27035699A JP27035699A JP3688950B2 JP 3688950 B2 JP3688950 B2 JP 3688950B2 JP 27035699 A JP27035699 A JP 27035699A JP 27035699 A JP27035699 A JP 27035699A JP 3688950 B2 JP3688950 B2 JP 3688950B2
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Japan
Prior art keywords
valve
hydraulic pump
switching valve
cut
control valve
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
Application number
JP27035699A
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Japanese (ja)
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JP2000120110A (en
Inventor
卓蔵 河村
正美 近藤
正晃 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yanmar Co Ltd
Original Assignee
Yanmar Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to JP27035699A priority Critical patent/JP3688950B2/en
Publication of JP2000120110A publication Critical patent/JP2000120110A/en
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Publication of JP3688950B2 publication Critical patent/JP3688950B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、バックホー等の旋回式掘削作業機において、油圧機構の構成に関する。
【0002】
【従来の技術】
従来から、旋回式掘削作業機の油圧回路に関する技術は公知とされているのである。
例えば、特開昭63−233127号公報に記載の技術の如くである。
【0003】
【発明が解決しようとする課題】
従来の旋回式掘削作業機において、カットオフバルブ、走行増速切換バルブも別に配置されていたのであるが、本発明は、これらをカットオフバルブ・走行増速切換バルブとして一体化し、油圧ポンプに付設して、油圧部品の配置を簡略化したものである。
【0004】
【課題を解決するための手段】
本発明が解決しようとする課題は以上の如くであり、次に該課題を解決するための手段を説明する。
旋回式掘削作業機において、操作レバーにより操作するリモコンバルブRを設け、該リモコンバルブRによりコントロールバルブCVを操作すべく構成し、該リモコンバルブRに圧油を供給する油圧ポンプP4を、エンジンEに付設し、機体を停止し、オペレータが座席から離れる場合に、前記油圧ポンプP4とリモコンバルブRの間の圧油回路を遮断し、操作レバーによる操作が不可能な状態にロックするカットオフバルブSOL・Bと、走行油圧モータの斜板の角度を急緩に切換えることにより、走行速度を2段に変速するバルブである走行増速切換バルブSOL・Aを設け、該走行増速切換バルブSOL・Aは、油圧ポンプP4からの圧油を切換操作すべく構成し、該カットオフバルブSOL・Bと走行増速切換バルブSOL・Aを、一体化したカットオフバルブ・走行増速切換バルブKに構成し、前記油圧ポンプP4の上部に、更に前記カットオフバルブ・走行増速切換バルブKを付設したものである。
【0005】
【発明の実施の形態】
次に実施例を説明する。
図1は操作レバー27により操作するリモコンバルブRと該リモコンバルブRへ圧油を供給する為の油圧ポンプP4と、カットオフバルブ・走行増速切換バルブKを一体化したバックホーの旋回フレームF部の平面図、
図2は油圧ポンプP4とカットオフバルブ・走行増速切換バルブKを一体化した状態の正面図、
図3は同じく図2の側面図、
図4は同じく油圧ポンプP4とカットオフバルブ・走行増速切換バルブKを一体化した油圧回路図、
図5は従来のカットオフバルブ・走行増速切換バルブKと油圧ポンプP4が別体に構成された油圧機構の斜視図、
図6は従来の油圧ポンプP4とカットオフバルブ・走行増速切換バルブKが別体とした構成された油圧機構の平面図である。
【0006】
図1と図5において、CVは掘削作業機用コントロールバルブ、Fは旋回フレーム、RAはエンジンEの右側に配置したラジエータ、Tは作動油タンク、19はブーム枢支体、21はスィングシリンダ、20はスイベルジョイントである。
また、旋回式掘削作業機は、ブーム18の先端にバケットアーム17を枢支し、該バケットアーム17の前端にバケット10を付設し、別に排土ブレード13を具備している。
【0007】
本発明は、旋回式掘削作業機において、操作コラムの先端の操作レバー27・27により操作するリモコンバルブRを設け、該リモコンバルブRによりコントロールバルブCVを操作すべく構成している。
該リモコンバルブRに圧油を供給する油圧ポンプP4をエンジンEに付設し、機体を停止しオペレータが座席から離れる場合に、前記油圧ポンプP4とリモコンバルブRの間の圧油回路を遮断し、操作レバー27による操作を不可能とするカットオフバルブと、走行油圧モータの斜板の角度を急緩に切換えることにより、走行速度を2段に変速するバルブである走行増速切換バルブを設け、該カットオフバルブと走行増速切換バルブを一体化してカットオフバルブ・走行増速切換バルブKに構成し、前記油圧ポンプP4にカットオフバルブ・走行増速切換バルブKを付設した構成としたものである。
【0008】
次に、図1〜図4において詳述する。
油圧ポンプP4は、他の油圧ポンプP1・P2・P3と同様にエンジンEのフライホイール側のクランク軸の部分に固定されている。
特に油圧ポンプP4は、油圧ポンプP1・P2・P3の先端部分に固定されている場合が多い。
そして、従来は図5と図6に示す如く、カットオフバルブ・走行増速切換バルブKは油圧ポンプP4とは別体に構成されていたのである。
油圧ポンプP4は回路的には、コントロールバルブCVを操作するリモコンバルブRに圧油を供給するポンプであり、該リモコンバルブRの回路の途中にカットオフバルブSOL・Bを設けて、機体を停止しオペレータが座席から離れる場合に、操作レバー27による操作が不可能な状態にロックするものである。
【0009】
また、走行増速切換バルブSOL・Aは、走行油圧モータの斜板の角度を急緩に切換えることにより、走行速度を2段に変速するバルブである。どちらも油圧ポンプP4の圧油を切換操作すべく構成しているので、該油圧ポンプP4からの油圧回路であれば、何処にでも配置できるのである。
本発明においては、該カットオフバルブSOL・Bと走行増速切換バルブSOL・Aを一体化してカットオフバルブ・走行増速切換バルブKとし、これを、エンジンEに付設した油圧ポンプP4の上部に更に付設したものである。
【0010】
以上のように構成したことによって、従来の如く、油圧ポンプP4とカットオフバルブ・走行増速切換バルブKとを別に構成する場合には、該カットオフバルブ・走行増速切換バルブKを取り付ける為のブラケットを、両方の側に用意する必要があったのであるが、カットオフバルブ・走行増速切換バルブKを油圧ポンプP4に直接一体化することにより、旋回フレームFの側のブラケットを必要としなくなったのである。
同様に、従来は油圧ポンプP4とカットオフバルブ・走行増速切換バルブKの間に介装していたパイプの取付が必要であったが、本発明の場合には、この部分のパイプの取付を省略することが出来るのである。
また、カットオフバルブ・走行増速切換バルブKは、エンジンEの側方に付設した油圧ポンプP4に固定しているので、油圧ポンプの点検補修と同じ感覚でメンテナンスが出来るようになった。
【0011】
【発明の効果】
本発明は以上の如く構成したので、次のような効果を奏するのである。
従来の如く、油圧ポンプとカットオフバルブ・走行増速切換バルブとを別に構成する場合には、該カットオフバルブ・走行増速切換バルブを取り付ける為のブラケットを、両方の側に用意する必要があったのであるが、カットオフバルブ・走行増速切換バルブKを一体化して、油圧ポンプP4に直接付設することにより、旋回フレームFの側のブラケットを必要としなくなったのである。
同様に、従来は油圧ポンプとカットオフバルブ・走行増速切換バルブの間に介装していたパイプの取付が必要であったが、本発明の場合には、この部分のパイプの取付を省略することが出来るのである。
また、カットオフバルブ・走行増速切換バルブKは、エンジンEの側方に付設した油圧ポンプP4に固定しているので、油圧ポンプの点検補修と同じ感覚でメンテナンスが出来るようになったのである。
【図面の簡単な説明】
【図1】 操作レバー27により操作するリモコンバルブRと該リモコンバルブRへ圧油を供給する為の油圧ポンプP4と、カットオフバルブ・走行増速切換バルブKを一体化したバックホーの旋回フレームF部の平面図。
【図2】 油圧ポンプP4とカットオフバルブ・走行増速切換バルブKを一体化した状態の正面図。
【図3】 同じく図2の側面図。
【図4】 同じく油圧ポンプP4とカットオフバルブ・走行増速切換バルブKを一体化した油圧回路図。
【図5】 従来のカットオフバルブ・走行増速切換バルブKと油圧ポンプP4が別体に構成された油圧機構の斜視図。
【図6】 従来の油圧ポンプP4とカットオフバルブ・走行増速切換バルブKが別体とした構成された油圧機構の平面図。
【符号の説明】
E エンジン
K カットオフバルブ・走行増速切換バルブ
R リモコンバルブ
P4 油圧ポンプ
T 作動油タンク
CV 掘削作業機用コントロールバルブ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a hydraulic mechanism in a swing excavation work machine such as a backhoe.
[0002]
[Prior art]
Conventionally, a technique related to a hydraulic circuit of a swivel excavator is known.
For example, the technique is described in JP-A-63-233127.
[0003]
[Problems to be solved by the invention]
In a conventional swivel excavator, a cut-off valve and a travel acceleration switching valve are also arranged separately. However, the present invention integrates them as a cut-off valve and a travel acceleration switching valve to provide a hydraulic pump. Attached, the arrangement of hydraulic parts is simplified.
[0004]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
In the revolving excavator, a remote control valve R that is operated by an operation lever is provided, and the remote control valve R is configured to operate the control valve CV. A hydraulic pump P4 that supplies pressure oil to the remote control valve R is provided with an engine E A cutoff valve that shuts off the pressure oil circuit between the hydraulic pump P4 and the remote control valve R and locks it in a state in which it cannot be operated by the operating lever when the aircraft is stopped and the operator leaves the seat. By switching the angle between the SOL / B and the swash plate of the traveling hydraulic motor suddenly and slowly, a traveling acceleration switching valve SOL / A , which is a valve for shifting the traveling speed in two stages, is provided, and the traveling acceleration switching valve SOL · a is the pressurized oil from the hydraulic pump P4 and configured to switch operation, and the cutoff valve SOL · B traveling speed increasing switching valve SOL · a, Conjugated and configured to cut off the valve travel speed increasing switching valve K, the top of the hydraulic pump P4, in which was further attached to the cutoff valve driving enhanced switching valve K.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, examples will be described.
FIG. 1 shows a swing frame F portion of a backhoe in which a remote control valve R operated by an operation lever 27, a hydraulic pump P4 for supplying pressure oil to the remote control valve R, and a cutoff valve / travel speed increasing switching valve K are integrated. The top view of
FIG. 2 is a front view of a state in which the hydraulic pump P4 and the cutoff valve / running acceleration switching valve K are integrated.
3 is a side view of FIG.
FIG. 4 is a hydraulic circuit diagram in which the hydraulic pump P4 and the cut-off valve / travel acceleration switching valve K are integrated,
FIG. 5 is a perspective view of a hydraulic mechanism in which a conventional cut-off valve / running acceleration switching valve K and a hydraulic pump P4 are configured separately.
FIG. 6 is a plan view of a hydraulic mechanism in which a conventional hydraulic pump P4 and a cut-off valve / running acceleration switching valve K are separated.
[0006]
1 and 5, CV is a control valve for excavator, F is a swing frame, RA is a radiator disposed on the right side of the engine E, T is a hydraulic oil tank, 19 is a boom pivot, 21 is a swing cylinder, Reference numeral 20 denotes a swivel joint.
Further, the swivel excavator has a bucket arm 17 pivotally supported at the tip of the boom 18, the bucket 10 is attached to the front end of the bucket arm 17, and a soil removal blade 13 is provided separately.
[0007]
According to the present invention, a rotary excavation work machine is provided with a remote control valve R that is operated by operating levers 27 and 27 at the end of an operation column, and the control valve CV is operated by the remote control valve R.
A hydraulic pump P4 for supplying pressure oil to the remote control valve R is attached to the engine E. When the operator stops and the operator leaves the seat, the pressure oil circuit between the hydraulic pump P4 and the remote control valve R is shut off. A cut-off valve that disables operation by the operation lever 27 and a travel acceleration switching valve that is a valve that shifts the travel speed in two stages by switching the angle of the swash plate of the travel hydraulic motor suddenly and slowly; The cut-off valve and travel acceleration switching valve are integrated into a cut-off valve / travel acceleration switching valve K, and the hydraulic pump P4 is provided with a cut-off valve / travel acceleration switching valve K. It is.
[0008]
Next, a detailed description will be given with reference to FIGS.
The hydraulic pump P4 is fixed to the crankshaft portion of the flywheel side of the engine E, like the other hydraulic pumps P1, P2, and P3.
In particular, the hydraulic pump P4 is often fixed to the tip portions of the hydraulic pumps P1, P2, and P3.
In the prior art, as shown in FIGS. 5 and 6, the cut-off valve / running acceleration switching valve K is configured separately from the hydraulic pump P4.
The hydraulic pump P4 is a pump that supplies pressure oil to the remote control valve R that operates the control valve CV in terms of circuit. A cut-off valve SOL / B is provided in the middle of the circuit of the remote control valve R to stop the aircraft. However, when the operator leaves the seat, the operation lever 27 is locked in a state where it cannot be operated.
[0009]
The travel acceleration switching valve SOL · A is a valve that shifts the travel speed in two stages by switching the angle of the swash plate of the travel hydraulic motor suddenly and slowly. Since both are configured to switch the pressure oil of the hydraulic pump P4, any hydraulic circuit from the hydraulic pump P4 can be arranged anywhere.
In the present invention, the cut-off valve SOL • B and the travel acceleration switching valve SOL • A are integrated into a cut-off valve / travel acceleration switching valve K, which is an upper part of the hydraulic pump P4 attached to the engine E. Is additionally attached to.
[0010]
With the above configuration, when the hydraulic pump P4 and the cut-off valve / running acceleration switching valve K are configured separately as in the prior art, the cut-off valve / running acceleration switching valve K is attached. However, it is necessary to prepare the bracket on the swivel frame F side by directly integrating the cut-off valve / travel acceleration switching valve K with the hydraulic pump P4. It was gone.
Similarly, in the past, it was necessary to install a pipe interposed between the hydraulic pump P4 and the cut-off valve / travel acceleration switching valve K. In the present invention, however, this part of the pipe is installed. Can be omitted.
Further, since the cut-off valve / running acceleration switching valve K is fixed to the hydraulic pump P4 attached to the side of the engine E, maintenance can be performed in the same manner as inspecting and repairing the hydraulic pump.
[0011]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
When the hydraulic pump and the cut-off valve / travel acceleration switching valve are configured separately as in the prior art, it is necessary to provide brackets on both sides for mounting the cut-off valve / travel acceleration switching valve. However, the bracket on the swivel frame F side is no longer required by integrating the cut-off valve and the travel acceleration switching valve K and attaching them directly to the hydraulic pump P4.
Similarly, in the past, it was necessary to install a pipe that was interposed between the hydraulic pump and the cut-off valve / travel acceleration switching valve. However, in the present invention, this part of the pipe is omitted. It can be done.
Further, since the cut-off valve / running acceleration switching valve K is fixed to the hydraulic pump P4 attached to the side of the engine E, maintenance can be performed in the same manner as inspecting and repairing the hydraulic pump. .
[Brief description of the drawings]
FIG. 1 is a backhoe swivel frame F in which a remote control valve R operated by an operation lever 27, a hydraulic pump P4 for supplying pressure oil to the remote control valve R, and a cut-off valve / running acceleration switching valve K are integrated. FIG.
FIG. 2 is a front view of a state in which a hydraulic pump P4 and a cut-off valve / running acceleration switching valve K are integrated.
3 is a side view of FIG. 2. FIG.
FIG. 4 is a hydraulic circuit diagram in which a hydraulic pump P4 and a cut-off valve / running speed increasing switching valve K are integrated.
FIG. 5 is a perspective view of a hydraulic mechanism in which a conventional cutoff valve / travel acceleration switching valve K and a hydraulic pump P4 are configured separately.
FIG. 6 is a plan view of a hydraulic mechanism in which a conventional hydraulic pump P4 and a cutoff valve / running acceleration switching valve K are separated.
[Explanation of symbols]
E Engine K Cut-off valve / running acceleration switching valve R Remote control valve P4 Hydraulic pump T Hydraulic oil tank CV Excavator control valve

Claims (1)

旋回式掘削作業機において、操作レバーにより操作するリモコンバルブRを設け、該リモコンバルブRによりコントロールバルブCVを操作すべく構成し、
該リモコンバルブRに圧油を供給する油圧ポンプP4を、エンジンEに付設し、
機体を停止し、オペレータが座席から離れる場合に、前記油圧ポンプP4とリモコンバルブRの間の圧油回路を遮断し、操作レバーによる操作が不可能な状態にロックするカットオフバルブSOL・Bと、走行油圧モータの斜板の角度を急緩に切換えることにより、走行速度を2段に変速するバルブである走行増速切換バルブSOL・Aを設け、該走行増速切換バルブSOL・Aは、油圧ポンプP4からの圧油を切換操作すべく構成し、
該カットオフバルブSOL・Bと走行増速切換バルブSOL・Aを、一体化したカットオフバルブ・走行増速切換バルブKに構成し、前記油圧ポンプP4の上部に、更に前記カットオフバルブ・走行増速切換バルブKを付設したことを特徴とする旋回式掘削作業機。
In the revolving excavator, a remote control valve R operated by an operation lever is provided, and the control valve CV is configured to be operated by the remote control valve R.
A hydraulic pump P4 for supplying pressure oil to the remote control valve R is attached to the engine E,
Cut-off valves SOL and B that shut off the pressure oil circuit between the hydraulic pump P4 and the remote control valve R and lock them in a state where they cannot be operated by the operation lever when the operator stops and the operator leaves the seat. , by switching the angle of the swash plate of the traveling hydraulic motor suddenly slow, the running speed increasing switching valve SOL · a is a valve which shift the speed in two stages is provided, the running speed increase switching valve SOL · a is It is configured to switch the pressure oil from the hydraulic pump P4,
The cutoff valve SOL-B and the travel speed increasing switching valve SOL-A, configured to integral cut Toofubarubu and running speed increasing switching valve K, the top of the hydraulic pump P4, further the cutoff valve driving up A swivel excavator having a speed switching valve K attached thereto.
JP27035699A 1999-09-24 1999-09-24 Swivel excavator Expired - Fee Related JP3688950B2 (en)

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JP27035699A JP3688950B2 (en) 1999-09-24 1999-09-24 Swivel excavator

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JP27035699A JP3688950B2 (en) 1999-09-24 1999-09-24 Swivel excavator

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JP5329311A Division JP3017385B2 (en) 1993-12-27 1993-12-27 Swivel excavator

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JP3688950B2 true JP3688950B2 (en) 2005-08-31

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