JPS60159798U - Hydraulic circuit of work vehicle with boom - Google Patents
Hydraulic circuit of work vehicle with boomInfo
- Publication number
- JPS60159798U JPS60159798U JP4692284U JP4692284U JPS60159798U JP S60159798 U JPS60159798 U JP S60159798U JP 4692284 U JP4692284 U JP 4692284U JP 4692284 U JP4692284 U JP 4692284U JP S60159798 U JPS60159798 U JP S60159798U
- Authority
- JP
- Japan
- Prior art keywords
- boom
- telescoping
- control valve
- work vehicle
- high pressure
- 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.)
- Pending
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) [Summary] 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
、第３“図は伸縮制御弁の断面図である。
４・・・・・・ブーム、１０・・・・・・伸縮シリンダ
、１４・・・・・・ブーム伸縮側高圧回路、１５・・・
・・・ブーム縮小側高圧回路、１６ａ、１６ｂ・・・・
・・パイロットチェック弁。The drawings show an embodiment of the present invention: Fig. 1 is an overall side view of the aerial work vehicle, Fig. 2 is a hydraulic circuit diagram with some parts omitted, and Fig. 3 is a sectional view of the telescopic control valve. 4...Boom, 10...Telescopic cylinder, 14...Boom telescopic side high voltage circuit, 15...
...Boom contraction side high voltage circuit, 16a, 16b...
...Pilot check valve.
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
プより伸縮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“ リングのブーム縮小
側高圧回路もしくはブーム伸長側高圧回路の少な（とも
一方に前記伸縮シリンダより９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、前記伸縮制御
弁が中立位置にあるとき、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に連なるポート
とオイルリザーバに連なるポート間を伸縮制御弁に形成
された絞りを介して連通ずるように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 the working vehicle, a telescoping boom is installed on a swivel base mounted on a vehicle body via a telescoping cylinder, and pressure oil is supplied to the telescoping cylinder from a hydraulic pump through a telescoping control valve. The high pressure circuit on the boom retraction side or the high pressure circuit on the boom extension side of the telescopic cylinder is equipped with a pilot check valve that prevents the flow of pressure oil from the telescopic cylinder, and the telescopic control valve is in the neutral position. When the pilot check valve is opened by applying back pressure, a port connected to the high pressure circuit and a port connected to the oil reservoir are communicated through a restriction formed in the telescopic control valve. A hydraulic circuit for a work vehicle with a boom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4692284U JPS60159798U (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 |
|---|---|---|---|
| JP4692284U JPS60159798U (en) | 1984-03-30 | 1984-03-30 | Hydraulic circuit of work vehicle with boom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60159798U true JPS60159798U (en) | 1985-10-24 |
Family
ID=30561768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4692284U Pending JPS60159798U (en) | 1984-03-30 | 1984-03-30 | Hydraulic circuit of work vehicle with boom |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60159798U (en) |
-
1984
- 1984-03-30 JP JP4692284U patent/JPS60159798U/en active Pending
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