JPS6294158U - - Google Patents
Info
- Publication number
- JPS6294158U JPS6294158U JP18216285U JP18216285U JPS6294158U JP S6294158 U JPS6294158 U JP S6294158U JP 18216285 U JP18216285 U JP 18216285U JP 18216285 U JP18216285 U JP 18216285U JP S6294158 U JPS6294158 U JP S6294158U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- travel
- switched
- pressure
- actuator
- 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 description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案建設機械の油圧回路の実施例を
示す。第２図は第１図の信号弁回路の論理回路図
であり、第３図は第１図の減圧信号弁の機能説明
図である。第４図は従来の油圧回路を示す。
１，２……油圧ポンプ、９，１１……走行モー
タ、１０，１２，１３……アクチユエータ、３，
５，６，７，８……アクチユエータ用操作弁、４
……余剰操作弁、１６……合流供給用管路、２０
〜２４……信号弁、２７……減圧信号弁、２８…
…パイロツト油圧源。
FIG. 1 shows an embodiment of the hydraulic circuit of the construction machine of the present invention. 2 is a logic circuit diagram of the signal valve circuit of FIG. 1, and FIG. 3 is a functional explanatory diagram of the pressure reducing signal valve of FIG. 1. FIG. 4 shows a conventional hydraulic circuit. 1, 2... Hydraulic pump, 9, 11... Travel motor, 10, 12, 13... Actuator, 3,
5, 6, 7, 8...actuator operation valve, 4
... Surplus operation valve, 16 ... Merging supply pipe, 20
~24... Signal valve, 27... Pressure reduction signal valve, 28...
...Pilot hydraulic power source.
Claims (1)
ンプと、左右の走行装置を駆動する左右個別の走
行モータと、他のアクチユエータ用操作弁とを具
備する油圧回路において、直進走行のため左右走
行用操作弁を共に切換えかつ他に同時操作を行う
アクチユエータ用操作弁を切換えた時に、この切
換わり状態を検出する信号弁を設け、片側ポンプ
吐出回路に接続された通常は余剰となつている操
作弁を上記信号弁の出力信号圧により切換え、他
方ポンプ吐出側に前記余剰操作弁からの管路を接
続して両方のポンプの吐出油を合流させ、左右走
行モータにパラレルに圧油を供給することにより
直進性を確保し、更に、同時操作を行うアクチユ
エータ用操作弁の切換パイロツト圧を、上記信号
弁の出力信号圧により切換えられる減圧信号弁に
より減圧し、同時操作を行うアクチユエータ用操
作弁の切換え量を絞り本アクチユエータへの圧油
供給量を規制して、走行スピードの極端な低下を
防止するようにしたことを特徴とする建設機械の
油圧回路。 In a hydraulic circuit that includes two main hydraulic pumps that hydraulically drive construction machinery, separate right and left travel motors that drive the left and right travel devices, and operation valves for other actuators, there is a hydraulic circuit for left and right travel for straight-ahead travel. A signal valve is provided to detect the switching state when the actuator operating valve is switched together with another actuator operating valve that is operated at the same time. is switched by the output signal pressure of the signal valve, and a pipe line from the surplus operation valve is connected to the discharge side of the other pump to merge the discharge oil of both pumps and supply pressure oil to the left and right traveling motors in parallel. In addition, the pilot pressure is reduced by a pressure reduction signal valve that is switched by the output signal pressure of the signal valve, and the actuator operation valves that are operated simultaneously are switched. A hydraulic circuit for construction machinery, characterized in that the amount of pressure oil supplied to the actuator is restricted to prevent an extreme drop in travel speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18216285U JPH0333804Y2 (en) | 1985-11-28 | 1985-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18216285U JPH0333804Y2 (en) | 1985-11-28 | 1985-11-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6294158U true JPS6294158U (en) | 1987-06-16 |
| JPH0333804Y2 JPH0333804Y2 (en) | 1991-07-17 |
Family
ID=31127702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18216285U Expired JPH0333804Y2 (en) | 1985-11-28 | 1985-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0333804Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012197835A (en) * | 2011-03-18 | 2012-10-18 | Takeuchi Seisakusho:Kk | Work machine |
| WO2024009619A1 (en) * | 2022-07-08 | 2024-01-11 | 株式会社小松製作所 | Hydraulic valve apparatus |
| WO2024009620A1 (en) * | 2022-07-08 | 2024-01-11 | 株式会社小松製作所 | Hydraulic valve device |
-
1985
- 1985-11-28 JP JP18216285U patent/JPH0333804Y2/ja not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012197835A (en) * | 2011-03-18 | 2012-10-18 | Takeuchi Seisakusho:Kk | Work machine |
| WO2024009619A1 (en) * | 2022-07-08 | 2024-01-11 | 株式会社小松製作所 | Hydraulic valve apparatus |
| WO2024009620A1 (en) * | 2022-07-08 | 2024-01-11 | 株式会社小松製作所 | Hydraulic valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0333804Y2 (en) | 1991-07-17 |
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