JPH041895U - - Google Patents
Info
- Publication number
- JPH041895U JPH041895U JP4285490U JP4285490U JPH041895U JP H041895 U JPH041895 U JP H041895U JP 4285490 U JP4285490 U JP 4285490U JP 4285490 U JP4285490 U JP 4285490U JP H041895 U JPH041895 U JP H041895U
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- oil
- tank
- hydraulic
- lower control
- 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
- Forklifts And Lifting Vehicles (AREA)
Description
第１図は高所作業車の各部構成を示す側面図、
第２図は従来の高所作業車の油圧回路の説明図、
第３図は本考案の高所作業車の油圧回路の説明図
、第４図は他の実施例の説明図である。
油圧ポンプ……５、下部制御弁……Ａ、上部制
御弁……Ｂ、タンク油路……７、タンク……８、
アンロード弁……９、油温検出手段……２４。
Figure 1 is a side view showing the configuration of each part of the aerial work vehicle;
Figure 2 is an explanatory diagram of the hydraulic circuit of a conventional aerial work vehicle.
FIG. 3 is an explanatory diagram of the hydraulic circuit of the aerial work vehicle of the present invention, and FIG. 4 is an explanatory diagram of another embodiment. Hydraulic pump...5, Lower control valve...A, Upper control valve...B, Tank oil line...7, Tank...8,
Unload valve...9, oil temperature detection means...24.
Claims (1)
ンプから吐出される作動油をブーム駆動用のアク
チユエータに給排する下部制御弁、当該下部制御
弁の後段に油路を介して接続され前記アクチユエ
ータに作動油を給排する上部制御弁、当該上部制
御弁の後段に接続され戻り油をタンクに還流する
タンク油路および前記下部制御弁の前段側の油路
とタンク間に介装され前記下部制御弁と上部制御
弁が共に中立位置に操作されたとき前記油圧ポン
プが吐出する作動油を直接タンクに開放するアン
ロード弁を備えた高所作業車の油圧回路において
、前記油圧ポンプが吐出する作動油の油温が所定
の温度以下になつたことを検出する油温検出手段
を設け、当該油温検出手段の検出信号により前記
アンロード弁を閉弁制御するよう構成したことを
特徴とする高所作業車の油圧回路。 A hydraulic pump mounted on the traveling vehicle body, a lower control valve that supplies and discharges hydraulic oil discharged from the hydraulic pump to an actuator for driving the boom, and a lower control valve that is connected to the rear stage of the lower control valve via an oil path and is actuated by the actuator. an upper control valve that supplies and discharges oil; a tank oil line that is connected to the rear stage of the upper control valve and that returns the return oil to the tank; and the lower control valve that is interposed between the oil passage and the tank on the front stage of the lower control valve. In the hydraulic circuit of an aerial work vehicle, the hydraulic circuit includes an unload valve that releases the hydraulic oil discharged by the hydraulic pump directly into a tank when both the upper control valve and the upper control valve are operated to the neutral position. The high place is characterized in that it is provided with an oil temperature detection means for detecting that the oil temperature of the oil temperature has fallen below a predetermined temperature, and is configured to control the unload valve to close based on a detection signal from the oil temperature detection means. Hydraulic circuit of work vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4285490U JP2508100Y2 (en) | 1990-04-20 | 1990-04-20 | Hydraulic circuit of aerial work vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4285490U JP2508100Y2 (en) | 1990-04-20 | 1990-04-20 | Hydraulic circuit of aerial work vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH041895U true JPH041895U (en) | 1992-01-09 |
| JP2508100Y2 JP2508100Y2 (en) | 1996-08-21 |
Family
ID=31554760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4285490U Expired - Fee Related JP2508100Y2 (en) | 1990-04-20 | 1990-04-20 | Hydraulic circuit of aerial work vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508100Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57206779A (en) * | 1981-06-12 | 1982-12-18 | Honda Motor Co Ltd | Portable hydroelectric generator |
-
1990
- 1990-04-20 JP JP4285490U patent/JP2508100Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57206779A (en) * | 1981-06-12 | 1982-12-18 | Honda Motor Co Ltd | Portable hydroelectric generator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2508100Y2 (en) | 1996-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH03113388U (en) | ||
| JPH0322622U (en) | ||
| JPS5926083U (en) | mobile agricultural machinery | |
| JPH0297400U (en) | ||
| JPH0344198U (en) | ||
| JPH0527557Y2 (en) | ||
| JPS5898285U (en) | Air rectifier for semi-trailer tractors | |
| JPH01175475U (en) | ||
| JPS6184753U (en) | ||
| JPH0168398U (en) | ||
| JPS58141763U (en) | Boom automatic correction device for boom sprayer | |
| JPH03100297U (en) | ||
| JPH0345371U (en) | ||
| JPS62128099U (en) | ||
| JPS6191433U (en) | ||
| JPH03107500U (en) | ||
| JPS63156249U (en) | ||
| JPS62110355U (en) | ||
| JPH02115071U (en) | ||
| JPH0261777U (en) | ||
| JPH02115073U (en) | ||
| JPH0367504U (en) | ||
| JPH0431632U (en) | ||
| JPS607228U (en) | Vehicle bodywork side power take-off device | |
| JPS63126419U (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |