JPS61105388U - - Google Patents
Info
- Publication number
- JPS61105388U JPS61105388U JP19057584U JP19057584U JPS61105388U JP S61105388 U JPS61105388 U JP S61105388U JP 19057584 U JP19057584 U JP 19057584U JP 19057584 U JP19057584 U JP 19057584U JP S61105388 U JPS61105388 U JP S61105388U
- Authority
- JP
- Japan
- Prior art keywords
- variable displacement
- hydraulic pump
- valve
- displacement hydraulic
- traveling
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Control And Safety Of Cranes (AREA)
Description
第１図は本考案の一実施例を示す油圧制御回路
図、第２図は本考案に係る可変容量形油圧ポンプ
の流量制御図、第３図は本考案に係るパイロツト
弁の性能線図、第４図は従来の油圧制御回路図で
ある。
FIG. 1 is a hydraulic control circuit diagram showing an embodiment of the present invention, FIG. 2 is a flow control diagram of a variable displacement hydraulic pump according to the present invention, and FIG. 3 is a performance diagram of a pilot valve according to the present invention. FIG. 4 is a conventional hydraulic control circuit diagram.
Claims (1)
列に配設した複数の方向切換弁と、それら方向切
換弁にシリーズ接続した走行用油圧モータ、巻上
用油圧モータ等のアクチユエータとを備え、前記
複数の方向切換弁をそれぞれ制御する複数のパイ
ロツト弁と、それらパイロツト弁によつて前記可
変容量形油圧ポンプの吐出油を制御するように構
成したクローラクレーン等の速度制御回路におい
て、前記複数のパイロツト弁中、走行用パイロツ
ト弁の２次圧力によつて切換えられ、かつ、その
２次圧力を前記可変容量形油圧ポンプの制御部に
導く管路の途中に、その管路を連通、遮断する２
位置切換弁を設け、その２位置切換弁の遮断側ポ
ートに至る管路を前記パイロツト弁の１次側回路
に接続するとともに、その接続管路に減圧弁を介
挿することにより、走行用油圧モータは可変容量
形油圧ポンプの最大吐出流量以下の設定流量で速
度制御され、走行用油圧モータ以外のアクチユエ
ータは可変容量形油圧ポンプの最大吐出流量で速
度制御されることを特徴とするクローラクレーン
等の速度制御回路。 The pump includes a plurality of directional switching valves arranged in series in the discharge side circuit of one variable displacement hydraulic pump, and actuators such as a traveling hydraulic motor and a hoisting hydraulic motor connected in series to the directional switching valves. A speed control circuit for a crawler crane or the like configured to include a plurality of pilot valves each controlling a plurality of directional switching valves, and a speed control circuit for a crawler crane or the like configured to control oil discharged from the variable displacement hydraulic pump by the pilot valves. The valve is switched by the secondary pressure of the traveling pilot valve, and is located in the middle of a pipeline that leads the secondary pressure to the control section of the variable displacement hydraulic pump, and connects and disconnects the pipeline.
By providing a position switching valve, connecting a pipe line leading to the shutoff side port of the two-position switching valve to the primary side circuit of the pilot valve, and inserting a pressure reducing valve into the connecting pipe line, the traveling hydraulic pressure can be adjusted. A crawler crane, etc., characterized in that the speed of the motor is controlled at a set flow rate that is less than the maximum discharge flow rate of a variable displacement hydraulic pump, and the speed of actuators other than the traveling hydraulic motor is controlled at the maximum discharge flow rate of the variable displacement hydraulic pump. speed control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19057584U JPS61105388U (en) | 1984-12-15 | 1984-12-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19057584U JPS61105388U (en) | 1984-12-15 | 1984-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61105388U true JPS61105388U (en) | 1986-07-04 |
Family
ID=30748026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19057584U Pending JPS61105388U (en) | 1984-12-15 | 1984-12-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61105388U (en) |
-
1984
- 1984-12-15 JP JP19057584U patent/JPS61105388U/ja active Pending
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