JPS6333067U - - Google Patents
Info
- Publication number
- JPS6333067U JPS6333067U JP12675686U JP12675686U JPS6333067U JP S6333067 U JPS6333067 U JP S6333067U JP 12675686 U JP12675686 U JP 12675686U JP 12675686 U JP12675686 U JP 12675686U JP S6333067 U JPS6333067 U JP S6333067U
- Authority
- JP
- Japan
- Prior art keywords
- spool
- sub
- control spool
- counterbalance valve
- load 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図はこの考案の実施例を示す断面図、第２
図は従来技術を示す断面図、第３図は従来技術に
おけるパイロツト圧力と制御スプールの移動量と
の関係を示す特性図、第４図はこの考案における
パイロツト圧力と制御スプールの移動量との関係
を示す特性図である。
Ｃ……カウンタバランス弁、１……カウンタバ
ランス弁の本体、２，３……第１、第２ポート、
５，７……第１、第２弁孔、９……パイロツトポ
ート、１０……パイロツト室、３５……チエツク
弁、３７……パイロツトピストン、３８……ピス
トンロツド、４０……第１環状突起、４１……第
１シート部、４５……制御スプール、４６……制
御部、４７……第１ポペツト部、５１……制御ス
プールの背圧室、５２……第２シート部、５３…
…サブスプール、５４……第２ポペツト部、５６
……スプリング、５７……プツシユロツド。
Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
The figure is a sectional view showing the conventional technology, Figure 3 is a characteristic diagram showing the relationship between the pilot pressure and the amount of movement of the control spool in the conventional technology, and Figure 4 is the relationship between the pilot pressure and the amount of movement of the control spool in this invention. FIG. C... Counterbalance valve, 1... Main body of the counterbalance valve, 2, 3... First and second ports,
5, 7...First and second valve holes, 9...Pilot port, 10...Pilot chamber, 35...Check valve, 37...Pilot piston, 38...Piston rod, 40...First annular projection, 41...First seat part, 45...Control spool, 46...Control unit, 47...First poppet part, 51...Back pressure chamber of control spool, 52...Second seat part, 53...
...Sub spool, 54...Second poppet section, 56
...Spring, 57...Putshurotsudo.
Claims (1)
ストンにより、最初にサブスプールを開操作し、
ついで、同パイロツトピストンにより制御スプー
ルを開操作し、シリンダを介して負荷を制御する
カウンタバランス弁において、負荷圧力を利用し
て制御スプールを閉方向に付勢するとともに、前
記制御スプールの負荷圧力作用面積とサブスプー
ルの負荷圧力作用面積とをほぼ等しく設定したこ
とを特徴とするカウンタバランス弁。 (2) 実用新案登録請求の範囲第１項において、
前記制御スプールとサブスプールとを単一のスプ
リングで閉方向に付勢したことを特徴とするカウ
ンタバランス弁。[Claims for Utility Model Registration] (1) A pilot piston moved by pilot pressure first opens the sub-spool,
Next, the control spool is opened by the same pilot piston, and in a counterbalance valve that controls the load via the cylinder, the control spool is biased in the closing direction using the load pressure, and the load pressure of the control spool is A counterbalance valve characterized in that the area and the load pressure acting area of the sub-spool are set almost equal. (2) In paragraph 1 of the claims for utility model registration,
A counterbalance valve characterized in that the control spool and the sub-spool are biased in the closing direction by a single spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12675686U JPH059521Y2 (en) | 1986-08-20 | 1986-08-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12675686U JPH059521Y2 (en) | 1986-08-20 | 1986-08-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6333067U true JPS6333067U (en) | 1988-03-03 |
| JPH059521Y2 JPH059521Y2 (en) | 1993-03-09 |
Family
ID=31020867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12675686U Expired - Lifetime JPH059521Y2 (en) | 1986-08-20 | 1986-08-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH059521Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020165511A (en) * | 2019-03-29 | 2020-10-08 | 住友重機械建機クレーン株式会社 | Working machine and counter balance valve |
-
1986
- 1986-08-20 JP JP12675686U patent/JPH059521Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020165511A (en) * | 2019-03-29 | 2020-10-08 | 住友重機械建機クレーン株式会社 | Working machine and counter balance valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH059521Y2 (en) | 1993-03-09 |