JPS62196906U - - Google Patents
Info
- Publication number
- JPS62196906U JPS62196906U JP8402586U JP8402586U JPS62196906U JP S62196906 U JPS62196906 U JP S62196906U JP 8402586 U JP8402586 U JP 8402586U JP 8402586 U JP8402586 U JP 8402586U JP S62196906 U JPS62196906 U JP S62196906U
- Authority
- JP
- Japan
- Prior art keywords
- oil passage
- chamber
- pump oil
- spool
- pump
- 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
- 239000003921 oil Substances 0.000 claims description 12
- 238000009966 trimming Methods 0.000 claims description 4
- 239000010727 cylinder oil Substances 0.000 claims description 3
Landscapes
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例の単動シリンダー用切
換弁のアンロード状態を示す断面図、第２図はそ
のオンロード状態を示す断面図である。
１……ポンプ、２……ケーシング、３……スプ
ール、３ｂ……ランド、４……チエツク弁、５…
…リリーフ弁、６……チエツク弁、７……単動シ
リンダー、８……バネ、９……オイルタンク、１
０……トリミング室、１１……ポンプ油路、１２
……孔、１３……通孔、１４……孔、１５……オ
リフイス、１６……孔、１７……リリーフ弁室、
１８……孔、１９……タンク油路、２０……シリ
ンダー油路、Ａ……切換弁。
FIG. 1 is a sectional view showing an unloaded state of a switching valve for a single-acting cylinder according to an embodiment of the present invention, and FIG. 2 is a sectional view showing its on-loaded state. 1... Pump, 2... Casing, 3... Spool, 3b... Land, 4... Check valve, 5...
...Relief valve, 6...Check valve, 7...Single acting cylinder, 8...Spring, 9...Oil tank, 1
0...Trimming chamber, 11...Pump oil path, 12
... hole, 13 ... through hole, 14 ... hole, 15 ... orifice, 16 ... hole, 17 ... relief valve chamber,
18...hole, 19...tank oil path, 20...cylinder oil path, A...switching valve.
Claims (1)
びポンプ油路にそれぞれ連通するスプール室を設
けると共に、前記スプール室内に一方向に付勢さ
れて前記シリンダー油路を前記タンク油路及びポ
ンプ油路に択一的に切換えるスプールを設け、前
記スプール室の一端にトリミング室を形成し、前
記スプールに前記ポンプ油路を前記トリミング室
に連通するオリフイスを形成し、前記トリミング
室をチエツク弁を介してタンク油路と連絡し、前
記ポンプ油路にポンプ油路の油圧で前記チエツク
弁を開放するリリーフ弁を設けたことを特徴とす
る単動シリンダー用切換弁。 A spool chamber is provided in the casing that communicates with the cylinder oil passage, the tank oil passage, and the pump oil passage, and the spool chamber is biased in one direction to select the cylinder oil passage as the tank oil passage and the pump oil passage. A trimming chamber is formed at one end of the spool chamber, an orifice is formed in the spool to communicate the pump oil passage with the trimming chamber, and the trimming chamber is connected to the tank oil through a check valve. 1. A switching valve for a single-acting cylinder, characterized in that a relief valve is provided in the pump oil passage, communicating with the pump oil passage, and opening the check valve using the hydraulic pressure of the pump oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8402586U JPS62196906U (en) | 1986-06-04 | 1986-06-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8402586U JPS62196906U (en) | 1986-06-04 | 1986-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62196906U true JPS62196906U (en) | 1987-12-15 |
Family
ID=30938150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8402586U Pending JPS62196906U (en) | 1986-06-04 | 1986-06-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62196906U (en) |
-
1986
- 1986-06-04 JP JP8402586U patent/JPS62196906U/ja active Pending