JPH01119446U - - Google Patents
Info
- Publication number
- JPH01119446U JPH01119446U JP1119688U JP1119688U JPH01119446U JP H01119446 U JPH01119446 U JP H01119446U JP 1119688 U JP1119688 U JP 1119688U JP 1119688 U JP1119688 U JP 1119688U JP H01119446 U JPH01119446 U JP H01119446U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- boom
- pilot
- reducing 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図は本考案によるローデイングシヨベルの
油圧回路の一実施例を示す回路図、第２図は本考
案の実施例の作用を説明するバケツト部の側面図
、第３図は従来の油圧回路の問題点を説明するバ
ケツト部の側面図である。
Fig. 1 is a circuit diagram showing an embodiment of the hydraulic circuit of a loading shovel according to the present invention, Fig. 2 is a side view of the bucket part explaining the operation of the embodiment of the invention, and Fig. 3 is a conventional hydraulic circuit diagram. FIG. 3 is a side view of the bucket part for explaining a problem with the circuit.
Claims (1)
の二次側に接続され、かつバケツトのクラウド操
作信号により切換えられて前記減圧弁により減圧
されたパイロツト油を二次側に供給する切換弁と
、該切換弁の二次側油圧とブーム上げパイロツト
油圧のうち高圧側を選択してブームシリンダのコ
ントロール弁のブーム上げ側パイロツト受圧部に
供給する高圧選択弁とを備えると共に、前記減圧
弁のセツト圧を、ブーム上げ緩動作を行なわせる
圧力に設定したことを特徴とするローデイングシ
ヨベルの油圧回路。 a pressure reducing valve that reduces pilot oil pressure; a switching valve that is connected to the secondary side of the pressure reducing valve and that is switched by a cloud operation signal from a bucket to supply the pilot oil that has been reduced in pressure by the pressure reducing valve to the secondary side; A high pressure selection valve selects the high pressure side of the secondary hydraulic pressure of the switching valve and the boom lifting pilot hydraulic pressure and supplies the high pressure side to the boom lifting side pilot pressure receiving part of the control valve of the boom cylinder. A hydraulic circuit for a loading shovel, characterized in that the pressure is set to a pressure that causes the boom to slowly raise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1119688U JPH0619649Y2 (en) | 1988-02-01 | 1988-02-01 | Hydraulic circuit of loading shovel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1119688U JPH0619649Y2 (en) | 1988-02-01 | 1988-02-01 | Hydraulic circuit of loading shovel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01119446U true JPH01119446U (en) | 1989-08-14 |
| JPH0619649Y2 JPH0619649Y2 (en) | 1994-05-25 |
Family
ID=31219535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1119688U Expired - Lifetime JPH0619649Y2 (en) | 1988-02-01 | 1988-02-01 | Hydraulic circuit of loading shovel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619649Y2 (en) |
-
1988
- 1988-02-01 JP JP1119688U patent/JPH0619649Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0619649Y2 (en) | 1994-05-25 |
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