JPH0470494U - - Google Patents
Info
- Publication number
- JPH0470494U JPH0470494U JP6977490U JP6977490U JPH0470494U JP H0470494 U JPH0470494 U JP H0470494U JP 6977490 U JP6977490 U JP 6977490U JP 6977490 U JP6977490 U JP 6977490U JP H0470494 U JPH0470494 U JP H0470494U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- side port
- hydraulic pump
- pressure compensation
- load cylinder
- 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
- 239000002131 composite material Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 230000004913 activation Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 1
Description
第１図はこの考案の一実施例を用いた油圧回路
図、第２図はこの考案によるリフタ用複合弁に用
いる圧力補償弁の閉止状態を示す断面図、第３図
は同じくその開放状態を示す断面図、第４図は上
記の圧力補償弁を用いた油圧回路の作動前の停止
状態を示す油圧回路図、第５図は同じくその作動
中の状態を示す油圧回路図、第６図は同じくその
作動直後の流量と時間との関係を示す線図、第７
図は第１図の一部を変更した油圧回路図、第８図
は従来の圧力補償弁の開放状態を示す断面図、第
９図は同じくその閉止状態を示す断面図、第１０
図は従来の圧力補償弁を用いた油圧回路の作動前
の停止状態を示す油圧回路図、第１１図は同じく
その作動直後の状態を示す油圧回路図、第１２図
は同じくその作動直後の流量と時間との関係を示
す線図である。
１……圧力補償弁、２……油圧ポンプ、４……
負荷シリンダ、５……電磁切換弁、６……絞り弁
、７……油タンク、８……リリーフ弁、１１……
ボデイ、１２……リテイナ、１３……スプール、
１５……スプリング、１６……Ｏリング、１７…
…バツクアツプリング、１８……スプリング室、
２０……リフタ用複合弁。
Fig. 1 is a hydraulic circuit diagram using an embodiment of this invention, Fig. 2 is a sectional view showing the closed state of the pressure compensating valve used in the lifter compound valve according to this invention, and Fig. 3 similarly shows its open state. 4 is a hydraulic circuit diagram showing a stopped state before operation of the hydraulic circuit using the pressure compensating valve, FIG. 5 is a hydraulic circuit diagram showing a state in which the hydraulic circuit is in operation, and FIG. Similarly, a diagram showing the relationship between the flow rate and time immediately after its operation, No. 7
The figure is a hydraulic circuit diagram partially modified from Fig. 1, Fig. 8 is a sectional view showing the conventional pressure compensation valve in its open state, Fig. 9 is a sectional view similarly showing its closed state, and Fig. 10 is a sectional view showing the conventional pressure compensation valve in its open state.
The figure is a hydraulic circuit diagram showing a stopped state before activation of a hydraulic circuit using a conventional pressure compensation valve, Fig. 11 is a hydraulic circuit diagram showing a state immediately after its activation, and Fig. 12 is a flow rate immediately after its activation. It is a diagram showing the relationship between and time. 1...Pressure compensation valve, 2...Hydraulic pump, 4...
Load cylinder, 5... Solenoid switching valve, 6... Throttle valve, 7... Oil tank, 8... Relief valve, 11...
Body, 12...retainer, 13...spool,
15... Spring, 16... O-ring, 17...
...Backup Spring, 18...Spring Room,
20...Composite valve for lifter.
Claims (1)
タンク間に接続されるリフタ用複合弁であつて、
負荷シリンダ側ポートと油圧ポンプ側ポートとを
連通する油路に油圧ポンプへの流れを阻止するチ
エツク弁を設ける一方、負荷シリンダ側ポートと
油タンク側ポートとを連通する油路に切換弁、絞
り弁及びノーリーク形圧力補償弁を直列に接続し
、前記圧力補償弁のスプリング側パイロツトライ
ンを該圧力補償弁の流入口側に接続すると共に、
反対側パイロツトラインを前記負荷シリンダ側ポ
ートに接続するようにしたことを特徴とするリフ
タ用複合弁。 ２ 請求項１記載のリフタ用複合弁において、前
記油圧ポンプ側、油タンク側両ポート間にリリー
フ弁を介して連通する油路を設けた請求項１記載
のリフタ用複合弁。[Scope of Claim for Utility Model Registration] 1. A composite valve for a lifter connected between a load cylinder with its own weight load, a hydraulic pump, and an oil tank,
A check valve is installed in the oil passage that communicates the load cylinder side port and the hydraulic pump side port to prevent the flow to the hydraulic pump, while a switching valve and a throttle are installed in the oil passage that communicates the load cylinder side port and the oil tank side port. A valve and a no-leak type pressure compensation valve are connected in series, and a spring side pilot line of the pressure compensation valve is connected to an inlet side of the pressure compensation valve,
A composite valve for a lifter, characterized in that the opposite pilot line is connected to the load cylinder side port. 2. The composite valve for a lifter according to claim 1, further comprising an oil passage communicating between the hydraulic pump side port and the oil tank side port via a relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6977490U JPH0751269Y2 (en) | 1990-06-30 | 1990-06-30 | Compound valve for lifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6977490U JPH0751269Y2 (en) | 1990-06-30 | 1990-06-30 | Compound valve for lifter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0470494U true JPH0470494U (en) | 1992-06-22 |
| JPH0751269Y2 JPH0751269Y2 (en) | 1995-11-22 |
Family
ID=31802298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6977490U Expired - Lifetime JPH0751269Y2 (en) | 1990-06-30 | 1990-06-30 | Compound valve for lifter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751269Y2 (en) |
-
1990
- 1990-06-30 JP JP6977490U patent/JPH0751269Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0751269Y2 (en) | 1995-11-22 |
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