JPS6186381U - - Google Patents
Info
- Publication number
- JPS6186381U JPS6186381U JP17220584U JP17220584U JPS6186381U JP S6186381 U JPS6186381 U JP S6186381U JP 17220584 U JP17220584 U JP 17220584U JP 17220584 U JP17220584 U JP 17220584U JP S6186381 U JPS6186381 U JP S6186381U
- Authority
- JP
- Japan
- Prior art keywords
- side oil
- oil chamber
- cylinder
- piston side
- connect
- 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
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案に係る実施例の油圧回路図、第
２図は従来例の油圧回路図である。
１７は元側シリンダ、１８は中間シリンダ、１
９は先端シリンダ、２１，２２，２３はピストン
側油室、２４，２５，３２，３３はパイロツトチ
エツク弁、２８，２９，３０はロツド側油室、３
４，３５，３６，３７はパイロツトラインを示す
。
FIG. 1 is a hydraulic circuit diagram of an embodiment of the present invention, and FIG. 2 is a hydraulic circuit diagram of a conventional example. 17 is the original cylinder, 18 is the intermediate cylinder, 1
9 is a tip cylinder, 21, 22, 23 are piston side oil chambers, 24, 25, 32, 33 are pilot check valves, 28, 29, 30 are rod side oil chambers, 3
4, 35, 36, and 37 indicate pilot lines.
Claims (1)
シリンダのピストン側油室へ接続し、他のシリン
ダのピストン側油室をパイロツトチエツク弁を介
して順次接続し、それぞれのパイロツトチエツク
弁のパイロツトラインを下段側のシリンダの最伸
長状態でピストン側油室に連通する様接続し、他
方の油路を最上段のシリンダのロツド側油室へ接
続し、他のシリンダのロツド側油室をパイロツト
チエツク弁を介して順次接続し、それぞれのパイ
ロツトチエツク弁のパイロツトラインを上段側の
シリンダの最縮短状態でロツド側油室に連通する
様接続したことを特徴とする多段伸縮ブームの油
圧回路。 One oil passage is connected to the piston side oil chamber of the lowest cylinder among the plurality of cylinders, and the piston side oil chambers of the other cylinders are sequentially connected via a pilot check valve, and each pilot check valve is connected to the piston side oil chamber of the lowest cylinder. Connect the pilot line to the piston side oil chamber of the lower cylinder in its fully extended state, connect the other oil passage to the rod side oil chamber of the uppermost cylinder, and connect the rod side oil chamber of the other cylinder to the piston side oil chamber. A hydraulic circuit for a multi-stage telescopic boom, characterized in that the hydraulic circuit is connected sequentially through pilot check valves, and the pilot line of each pilot check valve is connected so as to communicate with the rod-side oil chamber when the upper-stage cylinder is in its shortest contracted state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17220584U JPS6186381U (en) | 1984-11-13 | 1984-11-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17220584U JPS6186381U (en) | 1984-11-13 | 1984-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6186381U true JPS6186381U (en) | 1986-06-06 |
Family
ID=30729880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17220584U Pending JPS6186381U (en) | 1984-11-13 | 1984-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6186381U (en) |
-
1984
- 1984-11-13 JP JP17220584U patent/JPS6186381U/ja active Pending
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