JPS635058U - - Google Patents
Info
- Publication number
- JPS635058U JPS635058U JP9890186U JP9890186U JPS635058U JP S635058 U JPS635058 U JP S635058U JP 9890186 U JP9890186 U JP 9890186U JP 9890186 U JP9890186 U JP 9890186U JP S635058 U JPS635058 U JP S635058U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- hydraulic
- pilot pressure
- hydraulic circuit
- hydraulic cylinder
- 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
- 238000010276 construction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図Ａは本考案の第１実施例を示す油圧シヨ
ベルの側視図、第１図Ｂは第１図Ａの駆動油圧回
路図、第２図Ａ，Ｂは第２実施例を示す油圧シヨ
ベルの側視図と駆動油圧回路図、第３図Ａ，Ｂは
従来例を示す油圧シヨベルの側視図と駆動油圧回
路図である。
２，３，４：操作弁、２ａ，３ａ，４ａ：パイ
ロツト圧路、６，７，８：油圧シリンダ、６ａ，
６ｂ：油室、１６ａ，１６ｂ，……：油圧回路、
２１：連動油圧回路、２２：連動パイロツト圧路
、２３：開閉切換弁、２４：絞り弁、２５：逆止
弁、３１：切換弁、３２，３２′：パイロツト圧
路。
FIG. 1A is a side view of a hydraulic excavator showing the first embodiment of the present invention, FIG. 1B is a drive hydraulic circuit diagram of FIG. 1A, and FIGS. 2A and B are hydraulic pressures showing the second embodiment. A side view and a drive hydraulic circuit diagram of a shovel. FIGS. 3A and 3B are a side view and a drive hydraulic circuit diagram of a conventional hydraulic excavator. 2, 3, 4: Operation valve, 2a, 3a, 4a: Pilot pressure path, 6, 7, 8: Hydraulic cylinder, 6a,
6b: Oil chamber, 16a, 16b, ...: Hydraulic circuit,
21: Interlocking hydraulic circuit, 22: Interlocking pilot pressure path, 23: Open/close switching valve, 24: Throttle valve, 25: Check valve, 31: Switching valve, 32, 32': Pilot pressure path.
Claims (1)
て制御し、前記各油圧シリンダの各油圧回路に操
作弁を設けた駆動油圧回路において、外部負荷を
受ける前記油圧シリンダの油圧回路に絞り弁と開
閉切換弁および逆止弁を有し両油室間をバイパス
する連動油圧回路を付設するとともに、主操作用
となる前記油圧シリンダの操作弁作動用パイロツ
ト圧路に前記開閉切換弁の連動パイロツト圧路を
連設し、主操作用となる前記油圧シリンダ以外の
他の前記油圧シリンダの操作弁作動用パイロツト
圧によつて切換えられる切換弁を前記連動パイロ
ツト圧路に設けたことを特徴とする建設機械の駆
動油圧回路。 In a drive hydraulic circuit in which the drive system of a construction machine is controlled by a plurality of hydraulic cylinders, and each hydraulic circuit of each of the hydraulic cylinders is provided with an operating valve, a throttle valve and an opening/closing valve are provided in the hydraulic circuit of the hydraulic cylinder that receives an external load. An interlocking hydraulic circuit having a switching valve and a check valve and bypassing between both oil chambers is attached, and an interlocking pilot pressure path of the opening/closing switching valve is provided in a pilot pressure path for actuating the operation valve of the hydraulic cylinder used for main operation. construction machinery, characterized in that the linked pilot pressure path is provided with a switching valve that is switched by the pilot pressure for actuating the operating valve of the hydraulic cylinder other than the hydraulic cylinder used for main operation. drive hydraulic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9890186U JPS635058U (en) | 1986-06-30 | 1986-06-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9890186U JPS635058U (en) | 1986-06-30 | 1986-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS635058U true JPS635058U (en) | 1988-01-13 |
Family
ID=30967288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9890186U Pending JPS635058U (en) | 1986-06-30 | 1986-06-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS635058U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5673731A (en) * | 1980-04-07 | 1981-06-18 | Sumitomo Heavy Ind Ltd | Loading shovel |
-
1986
- 1986-06-30 JP JP9890186U patent/JPS635058U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5673731A (en) * | 1980-04-07 | 1981-06-18 | Sumitomo Heavy Ind Ltd | Loading shovel |
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