JPS6229567B2 - - Google Patents
Info
- Publication number
- JPS6229567B2 JPS6229567B2 JP54014600A JP1460079A JPS6229567B2 JP S6229567 B2 JPS6229567 B2 JP S6229567B2 JP 54014600 A JP54014600 A JP 54014600A JP 1460079 A JP1460079 A JP 1460079A JP S6229567 B2 JPS6229567 B2 JP S6229567B2
- Authority
- JP
- Japan
- Prior art keywords
- bucket
- circuit
- opening
- closing
- pressure oil
- 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
Links
- 230000002441 reversible effect Effects 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Description
【発明の詳細な説明】
この発明はバケツトとブレーカあるいはガンド
リル等とを同一油圧回路を利用して操作可能にし
たバケツト操作回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bucket operating circuit in which a bucket, a breaker, a gun drill, etc. can be operated using the same hydraulic circuit.
一般に２つの油圧機器を操作するためにはそれ
ぞれの油圧操作回路を構成するか、あるいは一方
の油圧回路の途中から切換弁等を介して並列回路
を構成しそれぞれ別個に操作しているのが実状で
ある。 In general, in order to operate two hydraulic devices, the actual situation is to either construct a hydraulic operation circuit for each, or to construct a parallel circuit from the middle of one hydraulic circuit via a switching valve, etc., and operate each separately. It is.
このため、前者においてはそれぞれの油圧回路
を構成しなければならないとともに、油圧機器が
離隔・狭隘位置にある場合、油圧ホース等の油圧
回路に長いものを必要とし、その処置がめんどう
である。 For this reason, in the former case, each hydraulic circuit must be configured, and if the hydraulic equipment is located in a remote or narrow location, a long hydraulic circuit such as a hydraulic hose is required, which is troublesome to deal with.
また、後者においては油圧機器に近接した位置
で分岐させなければ意味がなく、油圧機器に近接
した位置に切換弁等を設置しなければならず、そ
の取付位置の確保が困難であり、かつ切換弁等を
操作するための制御装置を必要とする等の不具合
を免れなかつた。 In addition, in the latter case, it is meaningless unless the branch is located close to the hydraulic equipment, and a switching valve, etc. must be installed near the hydraulic equipment, and it is difficult to secure the mounting location, and the switching This resulted in inconveniences such as the need for a control device to operate the valves, etc.
この発明は上記に鑑みなされたものであつて、
油圧源に可逆切換弁を介して連結したバケツト開
閉シリンダによつて一対のバケツトを開閉するよ
うにしたバケツト操作回路のバケツト開閉シリン
ダの閉じ側に接続した圧油供給回路にパイロツト
操作チエツク弁を介装するとともに、該圧油供給
回路の前記切換弁とパイロツト操作チエツク弁と
の間およびバケツト開閉シリンダの開き側に接続
した戻り油回路からそれぞれ分岐した並列回路に
セルフシールカツプリングを介してブレーカある
いはガンドリル等のアクチユエータを装着するこ
とにより上記の不具合を解決したものである。 This invention was made in view of the above, and
A pilot-operated check valve is connected to the pressure oil supply circuit connected to the closing side of the bucket opening/closing cylinder of the bucket operating circuit, which opens and closes a pair of bucket opening/closing cylinders connected to the hydraulic power source via a reversible switching valve. At the same time, a breaker or The above problem was solved by installing an actuator such as a gun drill.
以下図面に示した実施例に沿い説明する。 The following will explain the embodiments shown in the drawings.
第１図は本発明の基本回路を示すもので、１は
ポンプ等の油圧源、２は電磁弁、手動弁等の可逆
切換弁、３はバケツト開閉シリンダで前記切換弁
２とシリンダ３のバケツト閉じ側及び開き側に
夫々連通する圧油供給回路ａ，ｂの圧油供給回路
ａにはパイロツト操作チエツク弁４を介装すると
ともに、圧油供給回路ａ，ｂ間にはリリーフ弁５
およびチエツク弁６が介装されている。７はブレ
ーカあるいはガンドリル等の油圧アクチユエータ
で、バケツト閉じ側に接続した圧油供給回路ａの
可逆切換弁２とパイロツト操作チエツク弁４との
間およびバケツト開き側に接続した戻り油回路ｂ
との間からそれぞれ分岐した並列回路a′，b′にセ
ルフシールカツプリング８，８′を介して連結さ
れている。９はタンクである。 FIG. 1 shows the basic circuit of the present invention, in which 1 is a hydraulic power source such as a pump, 2 is a reversible switching valve such as a solenoid valve or a manual valve, and 3 is a bucket opening/closing cylinder. A pilot operated check valve 4 is interposed in the pressure oil supply circuits a and b that communicate with the closing side and the opening side, respectively, and a relief valve 5 is provided between the pressure oil supply circuits a and b.
and a check valve 6 are interposed. 7 is a hydraulic actuator such as a breaker or gun drill between the reversible switching valve 2 of the pressure oil supply circuit a connected to the bucket closing side and the pilot operation check valve 4, and the return oil circuit b connected to the bucket opening side.
are connected to parallel circuits a' and b' branched from between them via self-sealing couplings 8 and 8', respectively. 9 is a tank.
第２図は本発明を油圧シヨベルに実施した実施
例を示すもので基本的には第１図と同じである
が、第１図の油圧源１および可逆切換弁２は油圧
シヨベルに既設されているものを利用できるので
可逆切換弁２以降について例示している。 FIG. 2 shows an embodiment in which the present invention is applied to a hydraulic excavator, and is basically the same as FIG. Since the reversible switching valve 2 and subsequent valves can be used as an example.
１１は油圧シヨベルのバケツト操作用油圧装
置、１２はバケツトで、該バケツト１２はバケツ
ト開閉シリンダ１３により開閉される。 Reference numeral 11 denotes a hydraulic system for operating the bucket of the hydraulic excavator, and 12 denotes a bucket. The bucket 12 is opened and closed by a bucket opening/closing cylinder 13.
前記バケツト操作用油圧装置１１とシリンダ１
３とを連通する圧油供給回路ａ，ｂのバケツト開
閉シリンダのバケツト閉じ側に接続した圧油供給
回路ａにはロータリージヨイント１４、スイベル
ジヨイント１５およびパイロツト操作チエツク弁
１６が介装されており、かつバケツト開閉シリン
ダのバケツト開き側に接続した戻り油回路ｂには
電磁または手動の方向切換弁１７、ロータリージ
ヨイント１４′およびスイベルジヨイント１５′を
介装するとともに、前記回路ａ，ｂ間はバケツト
開閉シリンダのバケツト閉じ側圧力をリリーフす
るリリーフ弁１８および前記圧油供給側から戻り
油側へのみ流通を許容するチエツク弁１９を介し
て連通されている。 The hydraulic device 11 for bucket operation and the cylinder 1
A rotary joint 14, a swivel joint 15, and a pilot-operated check valve 16 are interposed in the pressure oil supply circuit a connected to the bucket closing side of the bucket opening/closing cylinder of the pressure oil supply circuits a and b communicating with the bucket opening/closing cylinder. The return oil circuit b connected to the bucket opening side of the bucket opening/closing cylinder is equipped with an electromagnetic or manual directional control valve 17, a rotary joint 14', and a swivel joint 15'. They are communicated through a relief valve 18 that relieves the pressure on the bucket closing side of the bucket opening/closing cylinder and a check valve 19 that allows flow only from the pressure oil supply side to the return oil side.
２０はブレーカあるいはガンドリル等の油圧ア
クチユエータで、該アクチユエータ２０は前記圧
油供給回路ａのスイベルジヨイント１５とパイロ
ツト操作チエツク弁１６との間および戻り油回路
ｂのシリンダ１３とスイベルジヨイント１５′と
の間からそれぞれ分岐した並列回路a′，b′にセル
フシールカツプリング２１，２１′を介して連通
されている。 20 is a hydraulic actuator such as a breaker or gun drill, and the actuator 20 is connected between the swivel joint 15 and the pilot operation check valve 16 of the pressure oil supply circuit a, and between the cylinder 13 and the swivel joint 15' of the return oil circuit b. They are connected to parallel circuits a' and b' branched from between, respectively, via self-sealing couplings 21 and 21'.
前記圧油供給回路ａ，ｂはバケツト１２の昇降
に応じてリール２２により巻下げ、巻上げを行な
う。２３はタンクである。 The pressure oil supply circuits a and b are lowered and hoisted by a reel 22 as the bucket 12 moves up and down. 23 is a tank.
この発明は以上の如き構成である。 This invention has the configuration as described above.
つぎにその作用を説明する。 Next, its effect will be explained.
「バケツト開閉操作」
セルフシールカツプリング８，８′，２１，２
１′を分離しセルフシールした状態で可逆切換弁
２を切換ることによりブレーカあるいはガンドリ
ル７，２０への圧油の供給は遮断されているため
従来のバケツト開閉と全く同様に作動する。"Bucket opening/closing operation" Self-seal coupling 8, 8', 21, 2
By switching the reversible switching valve 2 with the valve 1' separated and self-sealed, the supply of pressure oil to the breaker or gun drill 7, 20 is cut off, so the operation is exactly the same as the conventional bucket opening/closing operation.
即ち、バケツトを開く場合、可逆切換弁２をＡ
ポートに切換ると、圧油は可逆切換弁２からパイ
ロツト操作チエツク弁４，１６を介してバケツト
開閉シリンダ３，１３のバケツト閉じ側に供給さ
れるとともに、戻り油は戻り油回路ｂを経てタン
ク９，２３に戻される。 That is, when opening the bucket, the reversible switching valve 2 is set to A.
When switching to the port, pressure oil is supplied from the reversible switching valve 2 to the bucket closing side of the bucket opening/closing cylinders 3, 13 via the pilot operated check valves 4, 16, and the return oil is sent to the tank via the return oil circuit b. Returned to 9.23.
逆にバケツト１２を開く場合、可逆切換弁２を
Ｂポートに切換ると、圧油は可逆切換弁２から方
向切換弁１７を経て、または直接バケツト開閉シ
リンダ３，１３のバケツト開き側に供給されると
ともに、戻り油はパイロツト操作チエツク弁４，
１６にパイロツト圧が働き開かれるため、パイロ
ツト操作チエツク弁４，１６、可逆切換弁２を経
てタンク９，２３に戻される。 Conversely, when opening the bucket 12, when the reversible switching valve 2 is switched to the B port, pressure oil is supplied from the reversible switching valve 2 via the directional switching valve 17 or directly to the bucket opening side of the bucket opening/closing cylinders 3, 13. At the same time, the return oil flows through the pilot operated check valve 4,
16 is opened by the pilot pressure, so that it is returned to the tanks 9, 23 via the pilot operation check valves 4, 16 and the reversible switching valve 2.
「ブレーカあるいはガンドリルの操作」
前記のバケツト開放操作によりバケツト１２を
開いた状態でバケツト掴み位置にブレーカあるい
はガンドリル２０を挿入し、前記のバケツト閉じ
操作を行なうと、ブレーカあるいはガンドリル２
０はバケツト１２に掴まれる。この状態でバケツ
ト開閉シリンダ３，１３への圧油の供給を遮断し
ても（バケツト開放操作を行なわない限り）パイ
ロツト操作チエツク弁４，１６の作用によりバケ
ツト開閉シリンダ３，１３は保圧され、この状態
を保持する。"Operating the breaker or gun drill" When the breaker or gun drill 20 is inserted into the bucket gripping position with the bucket 12 opened by the bucket opening operation described above and the bucket closing operation is performed, the breaker or gun drill 20 is opened.
0 is grabbed by Bucket 12. Even if the supply of pressure oil to the bucket opening/closing cylinders 3, 13 is cut off in this state (unless the bucket opening operation is performed), the pressure in the bucket opening/closing cylinders 3, 13 will be maintained by the action of the pilot operated check valves 4, 16. Maintain this state.
つぎに可逆切換弁２を中立位置に戻し、方向切
換弁１７をＢポートに切換え圧抜きした後、分岐
回路a′，b′のセルフシールカツプリング８，
８′，２１，２１′を連結し、分岐回路a′，b′を連
結させ、可逆切換弁２をＡポートに切換えて圧油
供給回路ａ，a′に圧油の供給を行なうと、バケツ
ト開閉シリンダ３，１３は既に十分加圧されてい
るので、圧油はブレーカあるいはガンドリル７，
２０にのみ供給されバケツト１２に掴まれた状態
で作動する。 Next, after returning the reversible switching valve 2 to the neutral position and switching the directional switching valve 17 to the B port to relieve pressure, the self-sealing couplings 8 and 8 of the branch circuits a' and b'
8', 21, 21' are connected, the branch circuits a' and b' are connected, and the reversible switching valve 2 is switched to the A port to supply pressure oil to the pressure oil supply circuits a and a'. Since the opening/closing cylinders 3 and 13 are already sufficiently pressurized, the pressure oil flows through the breaker or gun drill 7,
It is supplied only to the bucket 20 and operates while being held by the bucket 12.
ブレーカあるいはガンドリル７，２０を作動す
るとブレーカあるいはガンドリル７，２０の油圧
の脈動等によりバケツト開閉シリンダ３，１３が
必要以上に加圧されるおそれがあるが、この場
合、リリーフ弁５，１８が作動し圧油を逃がす。 When the breaker or gun drill 7, 20 is activated, the bucket opening/closing cylinders 3, 13 may be pressurized more than necessary due to hydraulic pulsation of the breaker or gun drill 7, 20, but in this case, the relief valve 5, 18 is activated. and release the pressure oil.
また、第２図の実施例の如く、戻り油回路ｂに
介装した方向切換弁１７を、ブレーカあるいはガ
ンドリル等を装着した時にはＢポート（タンク２
３に直結）に切換るようにしておけば、誤操作に
よりバケツト１２が開かれることがなく、誤つて
ブレーカ７，２０を離すこともなく安全である。
なお、本実施例では、分岐回路を設けた油圧アク
チユエータとして、ブレーカとガンドリルを例示
したが、その他単動アクチユエータにも適応でき
ることはいうまでもない。 In addition, as in the embodiment shown in Fig. 2, when the directional control valve 17 installed in the return oil circuit b is equipped with a breaker or gun drill,
3), the bucket door 12 will not be opened due to erroneous operation, and the breakers 7 and 20 will not be released by mistake, making it safe.
In this embodiment, a breaker and a gun drill are used as examples of the hydraulic actuator provided with a branch circuit, but it goes without saying that other single acting actuators can also be applied.
以上述べた如く、本発明によれば、バケツトの
開閉操作は従来と全く同様に行ない得るととも
に、新たにブレーカ操作回路を設けたり、切換弁
等により切換操作することなしにバケツト操作回
路を利用し、バケツトで掴みながらブレーカを操
作することが可能であり竪穴掘り等配管スペース
を制限された場合においてもブレーカ等に対する
油圧配管を容易に行ない得る効果を有する。 As described above, according to the present invention, the bucket gate can be opened and closed in exactly the same manner as before, and the bucket gate operation circuit can be used without providing a new breaker operation circuit or switching operation using a switching valve or the like. It is possible to operate the breaker while grasping it with a bucket, and even when piping space is limited, such as by digging a pit, it has the effect of making hydraulic piping to the breaker etc. easy.
第１図は本発明の基本回路、第２図は本発明を
油圧シヨベルに実施した実施例を示す。
２……可逆切換弁、３，１３……バケツト開閉
シリンダ、４，１６……パイロツト操作チエツク
弁、８，８′，２１，２１′……セルフシールカツ
プリング、２０……ブレーカ。
FIG. 1 shows a basic circuit of the present invention, and FIG. 2 shows an embodiment in which the present invention is applied to a hydraulic excavator. 2... Reversible switching valve, 3, 13... Bucket opening/closing cylinder, 4, 16... Pilot operated check valve, 8, 8', 21, 21'... Self-seal coupling, 20... Breaker.
Claims (1)
ト開閉シリンダによつて、一対のバケツトを開閉
するようにしたバケツト操作回路においてバケツ
ト開閉シリンダの閉じ側に接続した圧油供給回路
にパイロツト操作チエツク弁を介装するととも
に、該圧油供給回路の前記切換弁とパイロツト操
作チエツク弁との間およびバケツト開閉シリンダ
の開き側に接続した戻り油回路からそれぞれ分岐
した並列回路にセルフシールカツプリングを介し
てブレーカあるいはガンドリル等の油圧アクチユ
エータを装着したことを特徴とするバケツト操作
回路。1 In a bucket operation circuit that opens and closes a pair of buckets by a bucket opening/closing cylinder connected to a hydraulic power source via a reversible switching valve, a pilot operated check valve is connected to the pressure oil supply circuit connected to the closing side of the bucket opening/closing cylinder. and a parallel circuit branched from the return oil circuit connected between the switching valve and the pilot operated check valve of the pressure oil supply circuit and to the opening side of the bucket opening/closing cylinder via a self-sealing coupling. A bucket operation circuit characterized by being equipped with a hydraulic actuator such as a breaker or gun drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1460079A JPS55108540A (en) | 1979-02-10 | 1979-02-10 | Bucket operating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1460079A JPS55108540A (en) | 1979-02-10 | 1979-02-10 | Bucket operating circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55108540A JPS55108540A (en) | 1980-08-20 |
| JPS6229567B2 true JPS6229567B2 (en) | 1987-06-26 |
Family
ID=11865676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1460079A Granted JPS55108540A (en) | 1979-02-10 | 1979-02-10 | Bucket operating circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55108540A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH072726Y2 (en) * | 1986-05-21 | 1995-01-25 | セイレイ工業株式会社 | Backhoe hydraulic circuit |
| JPH02204530A (en) * | 1989-02-01 | 1990-08-14 | Katsunori Tanada | Working device support structure incorporating power source |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725356A (en) * | 1980-07-23 | 1982-02-10 | Mitsubishi Gas Chem Co Inc | Curable resin composition |
-
1979
- 1979-02-10 JP JP1460079A patent/JPS55108540A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725356A (en) * | 1980-07-23 | 1982-02-10 | Mitsubishi Gas Chem Co Inc | Curable resin composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55108540A (en) | 1980-08-20 |
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