JPH0280699U - - Google Patents
Info
- Publication number
- JPH0280699U JPH0280699U JP15873388U JP15873388U JPH0280699U JP H0280699 U JPH0280699 U JP H0280699U JP 15873388 U JP15873388 U JP 15873388U JP 15873388 U JP15873388 U JP 15873388U JP H0280699 U JPH0280699 U JP H0280699U
- Authority
- JP
- Japan
- Prior art keywords
- pump
- sub
- main pump
- lift cylinder
- speed
- 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
- Forklifts And Lifting Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は実施例の油圧装置の回路図、第２図は
従来の油圧装置の回路図である。
１……切替バルブとしてのアンロードバルブ、
１５，８５……圧力センサ、５……メインポンプ
、５２……出口回路、６……サブポンプ、８……
２スピードバルブ、９１……オイルタンク、９５
……リフトシリンダ。
FIG. 1 is a circuit diagram of a hydraulic system according to an embodiment, and FIG. 2 is a circuit diagram of a conventional hydraulic system. 1...Unload valve as a switching valve,
15, 85...Pressure sensor, 5...Main pump, 52...Outlet circuit, 6...Sub pump, 8...
2 speed valve, 91...Oil tank, 95
...Lift cylinder.
Claims (1)
配設したオイルコントロールバルブと、サブポン
プの吐出側とオイルタンクとの間に配設した２ス
ピードバルブと、該２スピードバルブの入口側と
メインポンプの出口回路との間にチエツク弁を介
して配設した連結パイプとよりなるフオークリフ
トの２スピードホイスト用油圧装置おいて、 上記サブポンプの吐出側と２スピードバルブの
入口側との間に、リフトシリンダ非作動時におい
てメインポンプの出口回路が低圧力となつたとき
にサブポンプの吐出オイルをオイルタンクに戻す
、切替バルブを配設したことを特徴とするフオー
クリフトの油圧装置。[Scope of claim for utility model registration] The lift cylinder, the main pump, the oil control valve disposed between them, the two-speed valve disposed between the discharge side of the sub-pump and the oil tank, and the two-speed valve. A hydraulic system for a two-speed hoist for a forklift consisting of a connecting pipe installed between the inlet side of the sub-pump and the outlet circuit of the main pump via a check valve, the discharge side of the sub-pump and the inlet side of the two-speed valve Hydraulic system for a forklift, characterized in that a switching valve is installed between the lift cylinder and the main pump to return oil discharged from the sub-pump to the oil tank when the pressure in the outlet circuit of the main pump becomes low when the lift cylinder is not operating. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15873388U JPH0617835Y2 (en) | 1988-12-06 | 1988-12-06 | Forklift hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15873388U JPH0617835Y2 (en) | 1988-12-06 | 1988-12-06 | Forklift hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0280699U true JPH0280699U (en) | 1990-06-21 |
| JPH0617835Y2 JPH0617835Y2 (en) | 1994-05-11 |
Family
ID=31439326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15873388U Expired - Lifetime JPH0617835Y2 (en) | 1988-12-06 | 1988-12-06 | Forklift hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617835Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101716506B1 (en) * | 2010-12-24 | 2017-03-27 | 두산인프라코어 주식회사 | a hydraulic system for a construction heavy equipment and emergency driving method thereof |
-
1988
- 1988-12-06 JP JP15873388U patent/JPH0617835Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0617835Y2 (en) | 1994-05-11 |
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