JPS60159797U - Hydraulic circuit of work vehicle with boom - Google Patents
Hydraulic circuit of work vehicle with boomInfo
- Publication number
- JPS60159797U JPS60159797U JP4692184U JP4692184U JPS60159797U JP S60159797 U JPS60159797 U JP S60159797U JP 4692184 U JP4692184 U JP 4692184U JP 4692184 U JP4692184 U JP 4692184U JP S60159797 U JPS60159797 U JP S60159797U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- boom
- check valve
- work vehicle
- hydraulic pump
- 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
Landscapes
- Jib Cranes (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図面は本考案の実施例を示すもので、第１図は高所作業
車の全体側面図、第２図は一部省略して示す油圧回路図
である。
４・・・・・・ブーム、１０・・・・・・伸縮シリンダ
、１４・・・・・・ブーム伸長側高圧回路、１５・・・
・・・ブーム縮小側高圧回路、１６ａ、１６ｂ・・・・
・・パイロットチェック弁。
１The drawings show an embodiment of the present invention, and FIG. 1 is an overall side view of the aerial work vehicle, and FIG. 2 is a partially omitted hydraulic circuit diagram. 4...Boom, 10...Telescopic cylinder, 14...Boom extension side high voltage circuit, 15...
...Boom contraction side high voltage circuit, 16a, 16b...
...Pilot check valve. 1
Claims (1)
縮自在なブームを装設し、前記伸縮シリンダに油圧ポン
プよりクローズドセンタ油圧制御弁を介して圧油を供給
するようにした作業車において、前記伸縮シリンダのブ
ーム縮小側高圧回路もしくはブーム伸長側高圧回路の少
なくとも一方に前記伸縮シリンダよりの圧油の流れを阻
止するパイロットチェック弁を配設するとともに一前記
パイロットチェック弁に背圧を付与して開路させる側の
高圧回路と油圧ポンプの吐出回路との間にバイパス回路
を接続し、該バイパス回路に油圧ポンプの吐出回路方向
にのみ圧油の流れを許容する逆止弁を配設したことを特
徴とする、ブームを有する作業車の油圧回路。In a working vehicle, a telescopic boom is installed on a swivel base mounted on a vehicle body via a telescopic cylinder, and pressure oil is supplied to the telescopic cylinder from a hydraulic pump through a closed center hydraulic control valve. , a pilot check valve for blocking the flow of pressure oil from the telescoping cylinder is disposed in at least one of a boom retraction side high pressure circuit or a boom extension side high pressure circuit of the telescoping cylinder, and a back pressure is applied to the pilot check valve. A bypass circuit is connected between the high pressure circuit on the side to be opened and the discharge circuit of the hydraulic pump, and a check valve is provided in the bypass circuit to allow pressure oil to flow only in the direction of the discharge circuit of the hydraulic pump. A hydraulic circuit for a work vehicle having a boom, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4692184U JPS60159797U (en) | 1984-03-30 | 1984-03-30 | Hydraulic circuit of work vehicle with boom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4692184U JPS60159797U (en) | 1984-03-30 | 1984-03-30 | Hydraulic circuit of work vehicle with boom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60159797U true JPS60159797U (en) | 1985-10-24 |
| JPS644794Y2 JPS644794Y2 (en) | 1989-02-07 |
Family
ID=30561766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4692184U Granted JPS60159797U (en) | 1984-03-30 | 1984-03-30 | Hydraulic circuit of work vehicle with boom |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60159797U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI381968B (en) * | 2010-09-17 | 2013-01-11 | Kwang Yang Motor Co | Locomotive rear wheel disc system protection structure |
-
1984
- 1984-03-30 JP JP4692184U patent/JPS60159797U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS644794Y2 (en) | 1989-02-07 |
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