JPH0190866U - - Google Patents
Info
- Publication number
- JPH0190866U JPH0190866U JP18372187U JP18372187U JPH0190866U JP H0190866 U JPH0190866 U JP H0190866U JP 18372187 U JP18372187 U JP 18372187U JP 18372187 U JP18372187 U JP 18372187U JP H0190866 U JPH0190866 U JP H0190866U
- Authority
- JP
- Japan
- Prior art keywords
- speed increasing
- switching valve
- hydraulic
- actuator
- pressure oil
- 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
- 238000009412 basement excavation Methods 0.000 claims 2
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
Description
図面は本考案の一実施例の構成説明図である。
１，２は第１、第２のメインポンプ、３は補助
ポンプ、１９は増速切換弁、Ｄは走行増速回路、
Ｅはアクチユエータ。
The drawing is an explanatory diagram of the configuration of an embodiment of the present invention. 1 and 2 are first and second main pumps, 3 is an auxiliary pump, 19 is a speed increase switching valve, D is a travel speed increase circuit,
E is actuator.
Claims (1)
ポンプの圧油をそれぞれ片側の容量可変型の走行
モータと選択したフロント作業機のアクチユエー
タとへ供給するようにし、他の１つの補助ポンプ
の圧油を作業機のアクチユエータへ供給するよう
にした油圧掘削作業車両の油圧操作装置において
、前記補助ポンプの圧油回路に、中立ポジシヨン
の他に走行増速ポジシヨンと作業機増速ポジシヨ
ンとを有するセンタバイパス形３位置切換型の増
速切換弁を設け、この増速切換弁の一方の接続側
を、走行モータの斜板揺動切換弁に接続する走行
増速回路に接続し、増速切換弁の他方の接続側を
、フロント作業機のアクチユエータに接続する作
業増速回路に接続したことを特徴とする油圧掘削
作業車両の油圧操作装置。 It has three hydraulic pumps, and the pressure oil from two of the main pumps is supplied to the variable-capacity travel motor on one side and the actuator of the selected front work equipment, and the pressure oil from the other auxiliary pump is In a hydraulic operating device for a hydraulic excavation work vehicle configured to supply oil to an actuator of a working machine, the pressure oil circuit of the auxiliary pump has a center position in addition to a neutral position, a traveling speed increasing position and a working machine speed increasing position. A bypass type 3-position speed increasing switching valve is provided, and one connection side of this speed increasing switching valve is connected to a travel speed increasing circuit that connects to the swash plate rocking switching valve of the travel motor, and the speed increasing switching valve is A hydraulic operating device for a hydraulic excavation work vehicle, characterized in that the other connection side of the is connected to a work speed increasing circuit connected to an actuator of a front work machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18372187U JPH0619654Y2 (en) | 1987-12-03 | 1987-12-03 | Hydraulic operating device for hydraulic excavation work vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18372187U JPH0619654Y2 (en) | 1987-12-03 | 1987-12-03 | Hydraulic operating device for hydraulic excavation work vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0190866U true JPH0190866U (en) | 1989-06-14 |
| JPH0619654Y2 JPH0619654Y2 (en) | 1994-05-25 |
Family
ID=31475132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18372187U Expired - Lifetime JPH0619654Y2 (en) | 1987-12-03 | 1987-12-03 | Hydraulic operating device for hydraulic excavation work vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619654Y2 (en) |
-
1987
- 1987-12-03 JP JP18372187U patent/JPH0619654Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0619654Y2 (en) | 1994-05-25 |
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