JPH01120554U - - Google Patents
Info
- Publication number
- JPH01120554U JPH01120554U JP1651688U JP1651688U JPH01120554U JP H01120554 U JPH01120554 U JP H01120554U JP 1651688 U JP1651688 U JP 1651688U JP 1651688 U JP1651688 U JP 1651688U JP H01120554 U JPH01120554 U JP H01120554U
- Authority
- JP
- Japan
- Prior art keywords
- oil
- hydraulic
- amount
- piston
- oil chamber
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 claims 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Shovels (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
第１図はこの考案の要部油圧系統図、第２図は
第１図における流量調整弁の要部断面図、第３図
はメインポンプの特性線図、第４図はアクセルレ
バーの作動を示す斜視図、第５図は第４図におけ
るコーシヨンプレートの１例を示す詳細正面図、
第６図は油圧シヨベルに装着した油圧ブレーカで
の破砕作業中の状態を示す側面図である。
１……メインポンプ、２……パイロツトポンプ
、１１……油圧ブレーカ、１９……流量調整弁、
２０……受信部本体、３４……スプール、３７…
…ピストン、３８……調整ねじ、４１……スリー
ブ、４２……サーボピストン、４６……制御動力
部。
Fig. 1 is a diagram of the main hydraulic system of this invention, Fig. 2 is a sectional view of the main part of the flow rate adjustment valve in Fig. 1, Fig. 3 is a characteristic diagram of the main pump, and Fig. 4 shows the operation of the accelerator lever. 5 is a detailed front view showing an example of the caution plate in FIG. 4,
FIG. 6 is a side view showing a state in which a hydraulic breaker attached to a hydraulic excavator is performing a crushing operation. 1... Main pump, 2... Pilot pump, 11... Hydraulic breaker, 19... Flow rate adjustment valve,
20... Receiver body, 34... Spool, 37...
... Piston, 38 ... Adjustment screw, 41 ... Sleeve, 42 ... Servo piston, 46 ... Control power section.
Claims (1)
圧切換弁群と、該油圧切換弁群に圧油を供給する
可変容量形のメインポンプとで構成される作業用
油圧回路を備えた建設機械において、複数の油圧
パイロツト式油圧切換弁のうち、流入油量が所定
量に制限される油圧作業用工具に圧油を分配する
油圧切換弁のパイロツト油室に通じるパイロツト
管路の途中に設けた分岐管路と、メインポンプの
流量調整弁の受信部本体内に設けた油室に摺動自
在、かつ、油密的に嵌装され、該油室に信号圧力
が作用するとメインポンプ吐出油量を制限する方
向に摺動するピストンと、該ピストンの摺動量を
任意に外部から調整することのできる調整手段と
からなり、前記分岐管路を上記ピストンの油室に
導いたことを特徴とする建設機械の油圧回路。 A construction machine equipped with a working hydraulic circuit consisting of a hydraulic switching valve group consisting of a plurality of hydraulic pilot type hydraulic switching valves and a variable displacement main pump that supplies pressure oil to the hydraulic switching valve group. A branch pipe installed in the middle of a pilot pipe leading to the pilot oil chamber of a hydraulic pilot type hydraulic switching valve that distributes pressure oil to hydraulic work tools whose inflow oil amount is limited to a predetermined amount. It is slidably and oil-tightly fitted into the oil chamber provided in the receiver body of the main pump's flow rate adjustment valve, and when signal pressure acts on the oil chamber, it limits the amount of oil discharged by the main pump. A construction machine comprising a piston that slides in a direction and an adjusting means that can arbitrarily adjust the amount of sliding of the piston from the outside, the branch pipe being led to an oil chamber of the piston. Hydraulic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1651688U JPH061639Y2 (en) | 1988-02-10 | 1988-02-10 | Hydraulic circuit of construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1651688U JPH061639Y2 (en) | 1988-02-10 | 1988-02-10 | Hydraulic circuit of construction machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01120554U true JPH01120554U (en) | 1989-08-15 |
| JPH061639Y2 JPH061639Y2 (en) | 1994-01-12 |
Family
ID=31229518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1651688U Expired - Lifetime JPH061639Y2 (en) | 1988-02-10 | 1988-02-10 | Hydraulic circuit of construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH061639Y2 (en) |
-
1988
- 1988-02-10 JP JP1651688U patent/JPH061639Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH061639Y2 (en) | 1994-01-12 |
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