JPH01138959U - - Google Patents
Info
- Publication number
- JPH01138959U JPH01138959U JP2708088U JP2708088U JPH01138959U JP H01138959 U JPH01138959 U JP H01138959U JP 2708088 U JP2708088 U JP 2708088U JP 2708088 U JP2708088 U JP 2708088U JP H01138959 U JPH01138959 U JP H01138959U
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- switching
- merging
- traveling
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 claims 3
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図及び第２図はそれぞれ本考案の実施例の
油圧回路図、第３図は従来装置の油圧回路図であ
る。
１……第１ポンプ、２，８……パラレル通路、
３，４，９，１０，３′，４′，９′，１０′…
…作業機用切換弁、５，５′……第１走行用切換
弁、６……第１回路系統、７……第２ポンプ、１
１，１１′……第２走行用切換弁、１２……第２
回路系統、１３，１３′……合流切換弁、１４，
１８，２０……絞り。
1 and 2 are hydraulic circuit diagrams of an embodiment of the present invention, and FIG. 3 is a hydraulic circuit diagram of a conventional device. 1...First pump, 2,8...Parallel passage,
3, 4, 9, 10, 3', 4', 9', 10'...
... Switching valve for work equipment, 5, 5'... First travel switching valve, 6... First circuit system, 7... Second pump, 1
1, 11'...Second travel switching valve, 12...Second
Circuit system, 13, 13'...Merge switching valve, 14,
18, 20...Aperture.
Claims (1)
換弁３，４，９，１０とこれらの作業機用切換弁
３，４，９，１０にタンデムに接続された最上流
の走行用切換弁５，１１で構成する２組の回路系
統６，１２と、両回路系統の走行用切換弁５，１
１に接続する合流切換弁１３を含む建設機械の油
圧回路において、第１ポンプ１は第１回路系統６
の第１走行用切換弁５の入口ポートに接続し、第
２ポンプ７は第２回路系統１２のパラレル通路８
に絞り１４を介して接続し、合流切換弁１３は非
合流位置で第２走行用切換弁１１の入口ポートと
第２ポンプ７を連通して第２走行用切換弁１１と
第１走行用切換弁５との連通を断ち、合流位置で
第２走行用切換弁１１と第１走行用切換弁５を連
通しその連通路を合流切換弁に設けた絞り２０を
介して第２ポンプ７並びにいま一つの絞り１８を
介して第１回路系統６のパラレル通路２に接続し
たことを特徴とする建設機械の油圧装置。 ２ 作業機用切換弁３，４，９，１０及び走行用
切換弁５，１１をそれぞれパイロツト指令圧で切
換える手段と、所定作業機用切換弁９と合流切換
弁１３を一つのパイロツト指令圧で切換える手段
と、車両走行中作業機用切換弁の機能位置切換信
号で合流切換弁１３を切換える手段を備えた請求
項１記載の建設機械の油圧装置。 ３ 所定作業機用切換弁９がブームシリンダ用切
換弁である請求項２記載の建設機械の油圧装置。[Claims for Utility Model Registration] 1. Work machine switching valves 3, 4, 9, 10 connected by parallel passages 2, 8, and tandemly connected work machine switching valves 3, 4, 9, 10. Two sets of circuit systems 6, 12 constituted by the most upstream running switching valves 5, 11, and the running switching valves 5, 1 of both circuit systems.
1, the first pump 1 is connected to the first circuit system 6.
The second pump 7 is connected to the inlet port of the first travel switching valve 5 of the
The merging switching valve 13 communicates the inlet port of the second traveling switching valve 11 with the second pump 7 at the non-merging position, and the second traveling switching valve 11 and the first traveling switching valve 13 are connected to each other via a throttle 14. The communication with the valve 5 is cut off, and the second traveling switching valve 11 and the first traveling switching valve 5 are connected at the merging position, and the communication passage is connected to the second pump 7 and the first traveling switching valve 5 through a throttle 20 provided in the merging switching valve. A hydraulic system for construction machinery, characterized in that it is connected to a parallel passage 2 of a first circuit system 6 via one throttle 18. 2 Means for switching the work machine switching valves 3, 4, 9, 10 and travel switching valves 5, 11 using pilot command pressure, and means for switching the predetermined work machine switching valve 9 and merging switching valve 13 using one pilot command pressure. 2. The hydraulic system for construction machinery according to claim 1, further comprising means for switching the merging switching valve (13) and means for switching the merging switching valve (13) using a function position switching signal of a switching valve for a working machine while the vehicle is running. 3. The hydraulic system for construction machinery according to claim 2, wherein the designated work machine switching valve 9 is a boom cylinder switching valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988027080U JPH0643260Y2 (en) | 1988-02-29 | 1988-02-29 | Hydraulic equipment for construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988027080U JPH0643260Y2 (en) | 1988-02-29 | 1988-02-29 | Hydraulic equipment for construction machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01138959U true JPH01138959U (en) | 1989-09-22 |
| JPH0643260Y2 JPH0643260Y2 (en) | 1994-11-09 |
Family
ID=31249276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988027080U Expired - Lifetime JPH0643260Y2 (en) | 1988-02-29 | 1988-02-29 | Hydraulic equipment for construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0643260Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6012021B2 (en) * | 2012-11-07 | 2016-10-25 | Ｋｙｂ株式会社 | Hydraulic pressure control device for power shovel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61142235A (en) * | 1984-12-17 | 1986-06-30 | Sumitomo Heavy Ind Ltd | Oil-pressure circuit for construction machine such as oil-pressure shovel |
-
1988
- 1988-02-29 JP JP1988027080U patent/JPH0643260Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61142235A (en) * | 1984-12-17 | 1986-06-30 | Sumitomo Heavy Ind Ltd | Oil-pressure circuit for construction machine such as oil-pressure shovel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0643260Y2 (en) | 1994-11-09 |
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