JPS61140201U - - Google Patents
Info
- Publication number
- JPS61140201U JPS61140201U JP2370285U JP2370285U JPS61140201U JP S61140201 U JPS61140201 U JP S61140201U JP 2370285 U JP2370285 U JP 2370285U JP 2370285 U JP2370285 U JP 2370285U JP S61140201 U JPS61140201 U JP S61140201U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- relief valve
- main
- hydraulic
- valve
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例を示す油圧回路図、第
２図は標準仕様時の作動状態を示す機械の側面図
、第３図は特殊仕様時の作動状態を示す機械の側
面図、第４図乃至第６図はそれぞれ別の実施例を
示す油圧回路図、第７図は従来の油圧回路図であ
る。
１，２，３…油圧ポンプ、４，１５…主回路、
５，１６…主リリーフ弁、６〜１０，１７〜１９
…方向制御弁、１１ａ，１１ｂ…走行モータ、１
２…ブームシリンダ、１３…バケツトシリンダ、
１４…アームシリンダ、２１…バイパス回路、２
２…切換弁、２３…補助リリーフ弁。
Fig. 1 is a hydraulic circuit diagram showing an embodiment of the present invention, Fig. 2 is a side view of the machine showing the operating state in standard specifications, Fig. 3 is a side view of the machine showing the operating state in special specifications, and Fig. 3 is a side view of the machine showing the operating state in special specifications. 4 to 6 are hydraulic circuit diagrams showing different embodiments, and FIG. 7 is a conventional hydraulic circuit diagram. 1, 2, 3... Hydraulic pump, 4, 15... Main circuit,
5, 16...Main relief valve, 6-10, 17-19
...Direction control valve, 11a, 11b...Travel motor, 1
2...Boom cylinder, 13...Bucket cylinder,
14...Arm cylinder, 21...Bypass circuit, 2
2...Switching valve, 23...Auxiliary relief valve.
Claims (1)
よび方向制御弁を介して作業用アクチユエータを
接続してなる建設機械の油圧回路において、上記
主回路の主リリーフ弁より上流側にバイパス回路
をパラレルに接続し、このバイパス回路に、同回
路を上記主リリーフ弁より低圧に設定した補助リ
リーフ弁に接続する位置と、ブロツクする位置と
に切換自在の切換弁を設けたことを特徴とする建
設機械の油圧回路。 In a hydraulic circuit for construction machinery in which a work actuator is connected to the main circuit connected to a hydraulic pump via a main relief valve and a directional control valve, a bypass circuit is connected in parallel to the upstream side of the main relief valve in the main circuit. The hydraulic pressure of the construction machine is characterized in that the bypass circuit is provided with a switching valve which can be freely switched between a position where the circuit is connected to an auxiliary relief valve set at a lower pressure than the main relief valve and a position where it is blocked. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2370285U JPS61140201U (en) | 1985-02-21 | 1985-02-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2370285U JPS61140201U (en) | 1985-02-21 | 1985-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61140201U true JPS61140201U (en) | 1986-08-30 |
Family
ID=30517174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2370285U Pending JPS61140201U (en) | 1985-02-21 | 1985-02-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61140201U (en) |
-
1985
- 1985-02-21 JP JP2370285U patent/JPS61140201U/ja active Pending
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