JPS60106876U - Hydraulic switching valve for steering - Google Patents
Hydraulic switching valve for steeringInfo
- Publication number
- JPS60106876U JPS60106876U JP20520483U JP20520483U JPS60106876U JP S60106876 U JPS60106876 U JP S60106876U JP 20520483 U JP20520483 U JP 20520483U JP 20520483 U JP20520483 U JP 20520483U JP S60106876 U JPS60106876 U JP S60106876U
- Authority
- JP
- Japan
- Prior art keywords
- spool
- pilot
- switching valve
- variable throttle
- steering
- 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
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図面第１図は従来から知られている一般的なステアリン
グ制御用の回路図、第２図は従来の油圧切換弁の断面図
、第３図はこの考案の実施例を示す一部を省略した断面
図である。
４４・・・・・・スプール、４５，４６・・・・・・パ
イロット室、５０・・・・・・連通路、５１・・・・・
・チェック弁、５４及び５５・・・・・・可変絞りを構
成する凹部及び通油孔。Figure 1 is a conventionally known general steering control circuit diagram, Figure 2 is a sectional view of a conventional hydraulic switching valve, and Figure 3 shows an embodiment of this invention, with some parts omitted. FIG. 44... Spool, 45, 46... Pilot room, 50... Communication path, 51...
- Check valves, 54 and 55... recesses and oil holes that constitute variable throttles.
Claims (1)
これら両パイロット室を、スプールの移動量に応じて開
度が制御される可変絞りを介して連通させ、一方のパイ
ロット室に流入したパイロット流れが、上記可変絞りを
介して他方のパイロット室に流入し、この他方のパイロ
ット室からタンクに戻る流れが発生することによって、
上記可変絞り前後に圧力差が発生し、この前圧を上記パ
イロット圧として上記スプールに作用させる構成にした
ステアリング用油圧切換弁において、上記スプールには
、その軸線に沿って、しかもこのスプールを貫通する連
通路を形成するとともに、この連通路の両側には、上記
連通路からパイロット室への流通のみを許容するチェッ
ク弁を設ける一方、このチェック弁より内側であって、
スプールの移動量に応じて開度を可変にした可変絞りを
設けてなるステアリング用油圧切換弁。With both ends of the spool facing the pilot room,
These two pilot chambers are communicated through a variable throttle whose opening degree is controlled according to the amount of movement of the spool, and the pilot flow that flows into one pilot chamber flows into the other pilot chamber through the variable throttle. However, by generating a flow from this other pilot room back to the tank,
In the steering hydraulic switching valve configured such that a pressure difference occurs before and after the variable throttle, and this prepressure is applied to the spool as the pilot pressure, the spool has a pressure difference that extends along the axis of the spool and extends through the spool. At the same time, a check valve is provided on both sides of this communication path to allow flow only from the communication path to the pilot chamber, and on the inside of this check valve,
A hydraulic switching valve for steering equipped with a variable throttle whose opening degree is variable according to the amount of movement of the spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20520483U JPS60106876U (en) | 1983-12-26 | 1983-12-26 | Hydraulic switching valve for steering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20520483U JPS60106876U (en) | 1983-12-26 | 1983-12-26 | Hydraulic switching valve for steering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60106876U true JPS60106876U (en) | 1985-07-20 |
Family
ID=30767577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20520483U Pending JPS60106876U (en) | 1983-12-26 | 1983-12-26 | Hydraulic switching valve for steering |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60106876U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988009280A1 (en) * | 1987-05-26 | 1988-12-01 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic steering apparatus |
-
1983
- 1983-12-26 JP JP20520483U patent/JPS60106876U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988009280A1 (en) * | 1987-05-26 | 1988-12-01 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic steering apparatus |
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