JP2551543Y2 - Pressure oil supply device - Google Patents
Pressure oil supply deviceInfo
- Publication number
- JP2551543Y2 JP2551543Y2 JP1825591U JP1825591U JP2551543Y2 JP 2551543 Y2 JP2551543 Y2 JP 2551543Y2 JP 1825591 U JP1825591 U JP 1825591U JP 1825591 U JP1825591 U JP 1825591U JP 2551543 Y2 JP2551543 Y2 JP 2551543Y2
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- port
- pressure oil
- valve
- spool
- 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.)
- Expired - Lifetime
Links
Landscapes
- Fluid-Driven Valves (AREA)
- Magnetically Actuated Valves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、小型パワーショベル等
のマニアル操作とラジコン操作される作業車に用いられ
る圧油供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressurized oil supply device used for a work vehicle operated by manual operation and radio control of a small power shovel or the like.
【０００２】[0002]
【従来の技術】図１に示すように、油圧ポンプ１の吐出
路２に手動式切換弁３とラジコン切換弁４を設け、手動
式切換弁３の出力側を電気式切換弁５の戻りポート６に
接続し、ラジコン切換弁４の出力側を電気式切換弁５の
入口ポート７に接続し、その出口ポート８を主バルブ９
の受圧部１０に接続して主バルブ９を手動式切換弁３と
電気式切換弁５で切換えできるようにした圧油供給装置
が知られている。2. Description of the Related Art As shown in FIG. 1, a manual switching valve 3 and a radio control switching valve 4 are provided in a discharge passage 2 of a hydraulic pump 1, and an output side of the manual switching valve 3 is connected to a return port of an electric switching valve 5. 6, the output side of the radio control switching valve 4 is connected to the inlet port 7 of the electric switching valve 5, and the outlet port 8 is connected to the main valve 9.
There is known a pressure oil supply device which is connected to a pressure receiving portion 10 so that the main valve 9 can be switched between a manual switching valve 3 and an electric switching valve 5.
【０００３】[0003]
【考案が解決しようとする課題】かかる圧油供給装置に
用いられる電気式切換弁５は図２に示すように、弁本体
１１の弁孔１２にスプール１３を嵌挿し、このスプール
１３でバネ１４で遮断位置に保持し、ソレノイド１５で
連通位置に押す構造であり、手動式切換弁３から戻りポ
ート６に入る入口圧が急激に立上った場合にソレノイド
内部１６内の圧力が出口ポート８の圧力より先に高くな
り、スプール１３が遮断方向に押されて出口ポート８に
圧油を供給できずに手動式切換弁３を急操作した時にマ
ニアル操作できなくなる。これを解決する方法として、
ソレノイド内部１６に洩れた圧油をドレーンする外部配
管を設ける事が知られているが、場積、配管コストの点
で不利である。As shown in FIG. 2, a spool 13 is fitted into a valve hole 12 of a valve body 11 and an electric switching valve 5 used in such a pressure oil supply device is used. Is held in the shut-off position by the solenoid valve 15 and pushed to the communication position by the solenoid 15. When the inlet pressure from the manual switching valve 3 to the return port 6 rises rapidly, the pressure in the solenoid interior 16 rises to the outlet port 8. , And the spool 13 is pushed in the shut-off direction so that pressure oil cannot be supplied to the outlet port 8 and manual operation cannot be performed when the manual switching valve 3 is suddenly operated. To solve this,
It is known to provide an external pipe for draining leaked pressure oil into the solenoid interior 16, but it is disadvantageous in terms of space and piping cost.
【０００４】そこで、本考案は前述の課題を解決できる
ようにした圧油供給装置を提供することを目的とする。Therefore, an object of the present invention is to provide a pressure oil supply device capable of solving the above-mentioned problems.
【課題を解決するための手段】電気式切換弁のスプール
軸心に軸孔を形成して戻りポートとソレノイド内部を連
通し、その軸孔の入口側に絞りを設けたもの。Means for Solving the Problems An electric switching valve has a shaft hole formed in a spool shaft center, communicates a return port with the inside of a solenoid, and has a throttle provided on the inlet side of the shaft hole.
【作 用】絞りによってソレノイド内部の圧力上昇を
ゆっくりとしてスプールが戻りポートと出口ポートを遮
断する方向に移動しないようにできるから、手動式切換
弁を急操作してもマニアル操作できるし、ソレノイド内
部の圧油をドレーンする外部配管が不要となる。[Operation] The throttle can slowly increase the pressure inside the solenoid so that the spool does not move in the direction to shut off the return port and the outlet port. Therefore, even if the manual switching valve is suddenly operated, the manual operation can be performed. The need for an external pipe for draining the pressure oil is eliminated.
【０００５】[0005]
【実 施 例】図３に示すように、スプール１３の軸心
に穿孔したソレノイド内部１６に開口した軸孔１８を戻
りポート６に連通し、その軸孔１８の入口側に絞り１９
を設けてある。しかして、戻りポート６に流入した圧油
がソレノイド内部１６に流入することを絞り１９で制限
するから、ソレノイド内部１６の圧力上昇が緩慢とな
り、戻りポート６の入口圧の立上りが急であってもスプ
ール１３が遮断方向に移動しないので、手動式切換弁３
を急操作してもマニアル操作が可能となるし、ソレノイ
ド内部１６の圧油をドレーンする外部配管を設ける必要
がない。[Embodiment] As shown in FIG. 3, a shaft hole 18 opened in a solenoid 16 bored in the shaft center of the spool 13 is communicated with the return port 6, and a throttle 19 is formed on the inlet side of the shaft hole 18.
Is provided. Since the throttle 19 restricts the flow of the pressure oil flowing into the return port 6 into the solenoid interior 16, the pressure rise in the solenoid interior 16 becomes slow, and the rise of the inlet pressure of the return port 6 is sharp. Also, since the spool 13 does not move in the shut-off direction, the manual switching valve 3
The manual operation can be performed even if the valve is suddenly operated, and there is no need to provide an external pipe for draining the pressure oil inside the solenoid 16.
【０００６】[0006]
【考案の効果】戻りポート６に流入した圧油がソレノイ
ド内部１６に流入することを絞り１９で制限してソレノ
イド内部１６の内圧上昇をゆっくりにできるから、戻り
ポート６の入口圧の立上りが急でもスプール１３が戻り
ポート６と出口ポート８を遮断する方向に移動すること
がなく、手動式切換弁３を急操作してもマニアル操作で
きるし、ソレノイド内部１６の圧油をドレーンする外部
配管が不要となって場積、配管コストを低減できる。Effect of the Invention The restriction of the flow of the pressure oil flowing into the return port 6 into the solenoid interior 16 can be restricted by the throttle 19 so that the internal pressure in the solenoid interior 16 can be slowly increased. However, the spool 13 does not move in the direction of shutting off the return port 6 and the outlet port 8 and can be manually operated even when the manual switching valve 3 is suddenly operated, and the external piping for draining the pressure oil inside the solenoid 16 is not provided. It becomes unnecessary and the space and piping cost can be reduced.
【図１】従来の圧油供給装置の回路図である。FIG. 1 is a circuit diagram of a conventional pressure oil supply device.
【図２】従来の電気式切換弁の断面図である。FIG. 2 is a sectional view of a conventional electric switching valve.
【図３】従来の実施例を示す圧油供給装置の説明図であ
る。FIG. 3 is an explanatory diagram of a pressure oil supply device showing a conventional example.
１ 油圧ポンプ、２ 吐出路、３ 手動式切換弁、４
ラジコン切換弁、５電気式切換弁、６ 戻りポート、７
入口ポート、８ 出口ポート、９ 主バルブ、１０
受圧部、１１ 弁本体、１２ 弁孔、１３ スプール、
１４ バネ、１５ ソレノイド、１６ ソレノイド内
部、１８ 軸孔、１９ 絞り。1 hydraulic pump, 2 discharge path, 3 manual switching valve, 4
Radio control switching valve, 5 electric switching valve, 6 return port, 7
Inlet port, 8 outlet port, 9 main valve, 10
Pressure receiving part, 11 valve body, 12 valve hole, 13 spool,
14 spring, 15 solenoid, 16 solenoid inside, 18 shaft hole, 19 aperture.
Claims (1)
３とラジコン切換弁４の入口側に接続し、手動式切換弁
３の出口側を電気式切換弁５の戻りポート６に接続し、
ラジコン切換弁４の出口側を電気式切換弁５の入口ポー
ト７に接続し、その出口ポート８を主バルブ９の受圧部
１０に接続し、前記電気式切換弁５を、弁本体１１の弁
孔１２にスプール１３を嵌挿し、このスプール１３をバ
ネ１４で入口ポート７と出口ポート８を遮断し出口ポー
ト８を戻りポート６に連通する位置に保持し、かつソレ
ノイド１５で入口ポート７と出口ポート８を連通し戻り
ポート６と出口ポート８を遮断する位置に押す構造と
し、前記スプール１３の軸心に戻りポート６をソレノイ
ド内部１６に連通する軸孔１８を形成し、その軸孔１８
の入口側に絞り１９を設けたことを特徴とする圧油供給
装置。1. A discharge path 2 of a hydraulic pump 1 is connected to an inlet side of a manual switching valve 3 and a radio control switching valve 4, and an outlet side of the manual switching valve 3 is connected to a return port 6 of an electric switching valve 5. And
The outlet side of the radio control switching valve 4 is connected to the inlet port 7 of the electric switching valve 5, the outlet port 8 is connected to the pressure receiving portion 10 of the main valve 9, and the electric switching valve 5 is connected to the valve of the valve body 11. A spool 13 is inserted into the hole 12, the spool 13 is closed by a spring 14 so as to shut off the inlet port 7 and the outlet port 8, and the outlet port 8 is held at a position communicating with the return port 6. A structure is provided in which the port 8 communicates and is pushed to a position where the return port 6 and the outlet port 8 are shut off, and a shaft hole 18 is formed in the axis of the spool 13 to communicate the return port 6 with the inside 16 of the solenoid.
A pressure oil supply device, characterized in that a throttle 19 is provided on the inlet side of the pressure oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1825591U JP2551543Y2 (en) | 1991-03-04 | 1991-03-04 | Pressure oil supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1825591U JP2551543Y2 (en) | 1991-03-04 | 1991-03-04 | Pressure oil supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04107587U JPH04107587U (en) | 1992-09-17 |
| JP2551543Y2 true JP2551543Y2 (en) | 1997-10-22 |
Family
ID=31904813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1825591U Expired - Lifetime JP2551543Y2 (en) | 1991-03-04 | 1991-03-04 | Pressure oil supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2551543Y2 (en) |
-
1991
- 1991-03-04 JP JP1825591U patent/JP2551543Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04107587U (en) | 1992-09-17 |
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