JPH0254902U - - Google Patents
Info
- Publication number
- JPH0254902U JPH0254902U JP13451688U JP13451688U JPH0254902U JP H0254902 U JPH0254902 U JP H0254902U JP 13451688 U JP13451688 U JP 13451688U JP 13451688 U JP13451688 U JP 13451688U JP H0254902 U JPH0254902 U JP H0254902U
- Authority
- JP
- Japan
- Prior art keywords
- oil
- return
- hydraulic cylinder
- hydraulic circuit
- oil 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
- 238000010276 construction Methods 0.000 claims 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図ａ，ｂ及び第２図ａ，ｂはそれぞれこの
考案の実施例を示し、第３図はホイールローダの
側面図、第４図及び第５図はブームシリンダを制
御するための従来の油圧回路図である。
６……油圧シリンダ、６１Ｂ……ボトム側、６
１Ｒ……ロツド側、８０……アンチボイド弁、１
２０……ロツド弁、１４０……チエツク弁、２４
０……チエツク弁、２５１……オリフイス。
1a, b and 2 a, b respectively show an embodiment of this invention, FIG. 3 is a side view of a wheel loader, and FIGS. 4 and 5 are conventional methods for controlling a boom cylinder. It is a hydraulic circuit diagram. 6...Hydraulic cylinder, 61B...Bottom side, 6
1R... Rod side, 80... Anti-void valve, 1
20... Rod valve, 140... Check valve, 24
0...Check valve, 251...Orifice.
Claims (1)
路において、油圧シリンダのロツド側からの戻り
側油圧がポンプ吐出側の油圧よりも高いときに戻
り側油がポンプ吐出油側へ合流するように、チエ
ツク弁１４０とロツク弁１２０を設けたことを特
徴とする油圧回路。 (2) 建設機械の作業機の油圧シリンダの油圧回
路において、油圧シリンダのボトム側からの戻り
側油圧がポンプ吐出側の油圧よりも高いときに戻
り側油がポンプ吐出油側へ合流するように、チエ
ツク弁２４０とオリフイス２５１を設けたことを
特徴とする油圧回路。[Scope of Claim for Utility Model Registration] (1) In the hydraulic circuit of a hydraulic cylinder of a working machine of construction machinery, when the return side oil pressure from the rod side of the hydraulic cylinder is higher than the pump discharge side oil pressure, the return side oil is pumped. A hydraulic circuit characterized in that a check valve 140 and a lock valve 120 are provided so that the discharge oil merges with the discharge oil side. (2) In the hydraulic circuit of the hydraulic cylinder of the working machine of construction machinery, when the return oil pressure from the bottom side of the hydraulic cylinder is higher than the oil pressure on the pump discharge side, the return oil flows to the pump discharge oil side. , a hydraulic circuit characterized in that a check valve 240 and an orifice 251 are provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13451688U JPH0254902U (en) | 1988-10-17 | 1988-10-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13451688U JPH0254902U (en) | 1988-10-17 | 1988-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0254902U true JPH0254902U (en) | 1990-04-20 |
Family
ID=31393343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13451688U Pending JPH0254902U (en) | 1988-10-17 | 1988-10-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0254902U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002086331A1 (en) * | 2001-04-17 | 2002-10-31 | Shin Caterpillar Mitsubishi Ltd. | Fluid pressure circuit |
| JP2003521652A (en) * | 2000-02-04 | 2003-07-15 | オー ウント カー オーレンスタイン ウント コツペル アクチエンゲゼルシヤフト | In particular, a method and apparatus for controlling a lifting cylinder of a work machine. |
-
1988
- 1988-10-17 JP JP13451688U patent/JPH0254902U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003521652A (en) * | 2000-02-04 | 2003-07-15 | オー ウント カー オーレンスタイン ウント コツペル アクチエンゲゼルシヤフト | In particular, a method and apparatus for controlling a lifting cylinder of a work machine. |
| JP4652655B2 (en) * | 2000-02-04 | 2011-03-16 | ツェーエヌハー・バウマシイネン・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for controlling a lifting cylinder of a work machine |
| WO2002086331A1 (en) * | 2001-04-17 | 2002-10-31 | Shin Caterpillar Mitsubishi Ltd. | Fluid pressure circuit |
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