JPH0635604U - Directional switching valve switching device - Google Patents
Directional switching valve switching deviceInfo
- Publication number
- JPH0635604U JPH0635604U JP7196192U JP7196192U JPH0635604U JP H0635604 U JPH0635604 U JP H0635604U JP 7196192 U JP7196192 U JP 7196192U JP 7196192 U JP7196192 U JP 7196192U JP H0635604 U JPH0635604 U JP H0635604U
- Authority
- JP
- Japan
- Prior art keywords
- pressure receiving
- receiving portion
- pressure
- valve
- solenoid valve
- 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
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- Fluid-Pressure Circuits (AREA)
Abstract
(57)【要約】
【目的】 １つの比例電磁弁と１つの電磁弁で方向切換
弁を切換えできるようにする。
【構成】 方向切換弁３の第１受圧部４の受圧面積を第
２受圧部５の受圧面積の２倍とし、比例電磁弁２６の出
力ポート２７を第２受圧部５に接続すると共に、その出
力ポート２７を第１受圧部４に通電・遮断する電磁弁２
０を設けて第１受圧部４と第２受圧部５の受圧面積差に
よって方向切換弁３を切換えるようにする。
(57) [Summary] [Purpose] To enable switching of the directional control valve with one proportional solenoid valve and one solenoid valve. [Structure] The pressure receiving area of the first pressure receiving portion 4 of the direction switching valve 3 is set to be twice the pressure receiving area of the second pressure receiving portion 5, and the output port 27 of the proportional solenoid valve 26 is connected to the second pressure receiving portion 5 and Solenoid valve 2 for energizing / shutting off the output port 27 to the first pressure receiving portion 4
0 is provided so that the directional control valve 3 is switched depending on the pressure receiving area difference between the first pressure receiving portion 4 and the second pressure receiving portion 5.
Description
【０００１】[0001]
本考案は、油圧ポンプの吐圧油圧をアクチュエータに供給する方向切換弁を切 換える装置に関する。 The present invention relates to a device that switches a directional control valve that supplies the discharge hydraulic pressure of a hydraulic pump to an actuator.
【０００２】[0002]
図１に示すように、油圧ポンプ１の吐出圧油をアクチュエータ２に供給する方 向切換弁３は中立位置Ａ、第１供給位置Ｂ、第２供給位置Ｃを備え、第１受圧部 ４と第２受圧部５にパイロット圧油を供給することで各位置に切換えられる。 この方向切換弁３の第１・第２受圧部４，５にパイロット圧油を供給するには パイロット油圧ポンプ６の吐出路７に第１・第２比例電磁弁８，９を設けている 。 As shown in FIG. 1, the direction switching valve 3 that supplies the discharge pressure oil of the hydraulic pump 1 to the actuator 2 includes a neutral position A, a first supply position B, and a second supply position C, and a first pressure receiving portion 4 and By supplying the pilot pressure oil to the second pressure receiving portion 5, it is possible to switch to each position. In order to supply pilot pressure oil to the first and second pressure receiving portions 4 and 5 of the direction switching valve 3, the discharge passage 7 of the pilot hydraulic pump 6 is provided with first and second proportional solenoid valves 8 and 9.
【０００３】 前述の方向切換弁３と第１・第２比例電磁弁８，９の具体構造を示すと図２に 示すようになり、方向切換弁３は弁本体１０にスプール１１を嵌挿して第１・第 ２受圧部４，５を形成し、その第１・第２受圧部４，５のパイロット圧油の圧力 に比例してスプール１１を切換え作動してポンプポート１２と第１・第２アクチ ュエータ１３，１４の開口面積をコントロールするようになり、第１・第２比例 電磁弁８，９は弁本体１５にスプール１６とコイル１７を設けてコイル１７への 通電量でスプール１６を切換えて出力ポート１８の出力圧をコントロールするよ うにしてあり、その出力ポート１８と第１・第２受圧部４，５を回路１９でそれ ぞれ連通してある。 なお、図３に示すように方向切換弁３の弁本体１０に第１・第２比例電磁弁８ ，９の弁本体１５を直接取付けたものも知られている。The concrete structure of the directional control valve 3 and the first and second proportional solenoid valves 8 and 9 is as shown in FIG. 2. The directional control valve 3 has a spool 11 fitted in a valve body 10. The first and second pressure receiving portions 4 and 5 are formed, and the spool 11 is switched and operated in proportion to the pressure of the pilot pressure oil of the first and second pressure receiving portions 4 and 5 to operate the pump port 12 and the first and second pressure receiving portions. The opening areas of the two actuators 13 and 14 are controlled, and the first and second proportional solenoid valves 8 and 9 are provided with the spool 16 and the coil 17 in the valve body 15, and the spool 16 is controlled by the amount of electricity supplied to the coil 17. The output pressure of the output port 18 is controlled by switching, and the output port 18 and the first and second pressure receiving portions 4 and 5 are connected by the circuit 19 respectively. It is known that the valve body 10 of the directional control valve 3 is directly attached to the valve body 15 of the first and second proportional solenoid valves 8 and 9 as shown in FIG.
【０００４】[0004]
かかる方向切換弁の切換装置であると、大変高価で大きな比例電磁弁を２つ必 要とするので、コストが高くなるし取付けスペースも大きくなる。 Such a switching device for a directional switching valve is very expensive and requires two large proportional solenoid valves, resulting in high cost and a large mounting space.
【０００５】 そこで、本考案は前述の課題を解決できるようにした方向切換弁の切換装置を 提供することを目的とする。Therefore, an object of the present invention is to provide a switching device for a directional control valve capable of solving the above-mentioned problems.
【０００６】[0006]
第１受圧部４の圧油で第１供給位置Ｂ、第２受圧部５の圧油で第２供給位置Ｃ となる方向切換弁３を第１・第２供給位置Ｂ、Ｃに切換える装置において、方向 切換弁３の第１受圧部４の受圧面積を第２受圧部５の受圧面積の２倍とし、この 第１受圧部４を比例電磁弁２６の出力ポート２７とタンク２５に切換え接続する 電磁弁２０を設け、前記比例電磁弁２６を第２受圧部５に接続した方向切換弁の 切換装置。 In a device for switching the directional switching valve 3 between the first and second supply positions B and C in which the pressure oil of the first pressure receiving portion 4 is the first supply position B and the pressure oil of the second pressure receiving portion 5 is the second supply position C. The pressure receiving area of the first pressure receiving portion 4 of the direction switching valve 3 is set to be twice the pressure receiving area of the second pressure receiving portion 5, and the first pressure receiving portion 4 is connected to the output port 27 of the proportional solenoid valve 26 and the tank 25 by switching. A switching device for a directional switching valve in which a solenoid valve 20 is provided and the proportional solenoid valve 26 is connected to the second pressure receiving portion 5.
【０００７】[0007]
電磁弁２０を切換えて第１受圧部４をタンク２５に連通して比例電磁弁２６に 通電することで第２受圧部５に圧油を供給して方向切換弁３を第２供給位置に向 けて切換えでき、電磁弁２０を切換えて第１受圧部４を比例電磁弁２６の出力ポ ート２７に連通して比例電磁弁２６に通電することで第１・第２受圧部４，５に 圧油を供給してその受圧面積差によって方向切換弁３を第１供給位置に向けて切 換えできる。 By switching the solenoid valve 20 to connect the first pressure receiving portion 4 to the tank 25 and energize the proportional solenoid valve 26, pressure oil is supplied to the second pressure receiving portion 5 to direct the directional control valve 3 to the second supply position. The first and second pressure receiving portions 4, 5 are connected by connecting the first pressure receiving portion 4 to the output port 27 of the proportional solenoid valve 26 and energizing the proportional solenoid valve 26 by switching the solenoid valve 20. It is possible to switch the directional control valve 3 toward the first supply position by supplying the pressure oil to and by the difference in pressure receiving area.
【０００８】[0008]
本考案の実施例を図４に基づいて説明する。なお、従来と同一部材は符号を同 一とする。 方向切換弁３の第１受圧部４の受圧面積は第２受圧部５の受圧面積の２倍とな り、その第１受圧部４は電磁切換弁２０の第１ポート２１に接続され、この電磁 切換弁２０はバネ力で第１ポート２１を第２ポート２２に連通する第１位置に保 持され、ソレノイド２３に通電すると第１ポート２２を第３ポート２４に連通す る第２位置に切換えられるＯＮ・ＯＦＦ弁となり、その第２ポート２２はタンク ２５に接続し、第３ポート２４は比例電磁弁２６の出力ポート２７と方向切換弁 ３の第２受圧部５に接続している。 前記比例電磁弁２６はソレノイド２８の通電量に比例した圧力を出力ポート２ ７に出力する。 An embodiment of the present invention will be described with reference to FIG. The same members as in the past are designated by the same reference numerals. The pressure receiving area of the first pressure receiving portion 4 of the direction switching valve 3 is twice the pressure receiving area of the second pressure receiving portion 5, and the first pressure receiving portion 4 is connected to the first port 21 of the electromagnetic switching valve 20. The electromagnetic switching valve 20 is held by spring force in the first position where the first port 21 communicates with the second port 22, and when the solenoid 23 is energized, the solenoid switching valve 20 is moved into the second position where the first port 22 communicates with the third port 24. It becomes a switchable ON / OFF valve, the second port 22 of which is connected to the tank 25, and the third port 24 is connected to the output port 27 of the proportional solenoid valve 26 and the second pressure receiving portion 5 of the direction switching valve 3. The proportional solenoid valve 26 outputs a pressure proportional to the energization amount of the solenoid 28 to the output port 27.
【０００９】 次に作動を説明する。 図４に示す状態で比例電磁弁２６のソレノイド２８に通電して出力ポート２７ に圧油を出力すると、その圧油は第２受圧部５に供給されて方向切換弁３を第２ 供給位置Ｃに向けて切換え作動する。この時第１受圧部４の圧油は電磁弁２０を 経てタンク２５に流出する。Next, the operation will be described. When the solenoid 28 of the proportional solenoid valve 26 is energized and pressure oil is output to the output port 27 in the state shown in FIG. 4, the pressure oil is supplied to the second pressure receiving portion 5 to move the directional control valve 3 to the second supply position C. Switching operation toward. At this time, the pressure oil of the first pressure receiving portion 4 flows out to the tank 25 via the solenoid valve 20.
【００１０】 電磁弁２０のソレノイド２３に通電して第２位置として第３ポート２４と第１ ポート２１を連通し、比例電磁弁２６のソレノイド２８に通電して出力ポート２ ７の圧油を出力すると、その圧油は方向切換弁３の第１・第２受圧部４，５に供 給されるが、第１受圧部４の受圧面積が第２受圧部５の受圧面積の２倍であるか ら、第２受圧部５に圧油が供給されずに第１受圧部４にのみ圧油が供給されたと 同様になって方向切換弁３は第１供給位置Ｂに向けて切換えられる。The solenoid 23 of the solenoid valve 20 is energized to connect the third port 24 and the first port 21 to the second position, and the solenoid 28 of the proportional solenoid valve 26 is energized to output the pressure oil of the output port 27. Then, the pressure oil is supplied to the first and second pressure receiving portions 4 and 5 of the direction switching valve 3, but the pressure receiving area of the first pressure receiving portion 4 is twice the pressure receiving area of the second pressure receiving portion 5. Therefore, the direction switching valve 3 is switched to the first supply position B in the same manner as when the pressure oil is not supplied to the second pressure receiving portion 5 and only the first pressure receiving portion 4 is supplied with the pressure oil.
【００１１】 図５は具体構造を示し、方向切換弁３の弁本体１０にハウジング３０をスプー ル１１と同心状に取付け、このハウジング３０内にピストン３１を嵌挿してピス トン３１を左に押す第１圧力室３２とピストン３１を右に押しかつスプール１１ を左に押す第２圧力室３３を形成し、そのピストン３１をスプール１１に連結し かつスプリング３４で右方に押してスプール１１を中立位置に保持してあり、前 記ピストン３１の断面積をスプール１１の断面積の２倍として第１圧力室３２を 第１受圧部４、第２圧力室３３を第２受圧部５としてある。FIG. 5 shows a specific structure. A housing 30 is concentrically attached to the spool 11 on the valve body 10 of the directional control valve 3, a piston 31 is fitted in the housing 30, and the piston 31 is pushed to the left. A second pressure chamber 33 is formed which pushes the first pressure chamber 32 and the piston 31 to the right and pushes the spool 11 to the left, and connects the piston 31 to the spool 11 and pushes it to the right with a spring 34 to move the spool 11 to the neutral position. The first pressure chamber 32 serves as the first pressure receiving portion 4 and the second pressure chamber 33 serves as the second pressure receiving portion 5 by making the cross-sectional area of the piston 31 twice as large as the cross-sectional area of the spool 11.
【００１２】 弁本体４０に第１スプール４１とソレノイド４２及び第２スプール４３と第２ ソレノイド４４を設けて比例電磁弁２６と電磁弁２０を構成してある。The valve body 40 is provided with a first spool 41 and a solenoid 42 and a second spool 43 and a second solenoid 44 to form the proportional solenoid valve 26 and the solenoid valve 20.
【００１３】[0013]
【考案の効果】 電磁弁２０を切換えて第１受圧部４をタンク２５に連通して比例電磁弁２６に 通電することで第２受圧部５に圧油を供給して方向切換弁３を第２供給位置に向 けて切換えでき、電磁弁２０を切換えて第１受圧部４を比例電磁弁２６の出力ポ ート２７に連通して比例電磁弁２６に通電することで第１・第２受圧部４，５に 圧油を供給してその受圧面積差によって方向切換弁３を第１供給位置に向けて切 換えできる。 したがって、高価で大きな１つの比例電磁弁２６と安価で小さな１つの電磁弁 ２０を用いれば良いから、コストが安くなるし、設置スペースを小さくできる。Effect of the Invention By switching the solenoid valve 20 to connect the first pressure receiving portion 4 to the tank 25 and energize the proportional solenoid valve 26, pressure oil is supplied to the second pressure receiving portion 5 to move the directional control valve 3 to the first position. By switching the solenoid valve 20 to connect the first pressure receiving portion 4 to the output port 27 of the proportional solenoid valve 26 and energizing the proportional solenoid valve 26, the first and second supply positions can be switched. By supplying pressure oil to the pressure receiving portions 4 and 5, the directional control valve 3 can be switched toward the first supply position depending on the pressure receiving area difference. Therefore, since one expensive and large proportional solenoid valve 26 and one inexpensive and small solenoid valve 20 may be used, the cost is reduced and the installation space can be reduced.
【図１】従来例の線図的構成説明図である。FIG. 1 is a diagrammatic explanatory diagram of a conventional example.
【図２】従来例の具体構造を示す断面図である。FIG. 2 is a cross-sectional view showing a specific structure of a conventional example.
【図３】従来例の具体構造を示す断面図である。FIG. 3 is a cross-sectional view showing a specific structure of a conventional example.
【図４】本考案の実施例を示す線図的構成説明図であ
る。FIG. 4 is a diagrammatic configuration explanatory view showing an embodiment of the present invention.
【図５】本考案の実施例を示す具体構造の断面図であ
る。FIG. 5 is a sectional view of a concrete structure showing an embodiment of the present invention.
１…油圧ポンプ、２…アクチュエータ、３…方向切換
弁、４…第１受圧部、５…第２受圧部、２０…電磁弁、
２６…比例電磁弁、２７…出力ポート。DESCRIPTION OF SYMBOLS 1 ... Hydraulic pump, 2 ... Actuator, 3 ... Direction switching valve, 4 ... 1st pressure receiving part, 5 ... 2nd pressure receiving part, 20 ... Solenoid valve,
26 ... Proportional solenoid valve, 27 ... Output port.
Claims (2)
第２受圧部５の圧油で第２供給位置Ｃとなる方向切換弁
３を第１・第２供給位置Ｂ、Ｃに切換える装置におい
て、 方向切換弁３の第１受圧部４の受圧面積を第２受圧部５
の受圧面積の２倍とし、この第１受圧部４を比例電磁弁
２６の出力ポート２７とタンク２５に切換え接続する電
磁弁２０を設け、前記比例電磁弁２６の出力ポート２７
を第２受圧部５に接続したことを特徴とする方向切換弁
の切換装置。1. A first supply position B for the pressure oil of the first pressure receiving portion 4,
In a device that switches the directional switching valve 3 that is in the second supply position C to the first and second supply positions B and C by the pressure oil of the second pressure receiving portion 5, the pressure receiving area of the first pressure receiving portion 4 of the directional switching valve 3 is Second pressure receiving part 5
And a solenoid valve 20 for switching and connecting the first pressure receiving portion 4 to the output port 27 of the proportional solenoid valve 26 and the tank 25.
Is connected to the second pressure receiving section 5, and a switching device for a directional control valve.
３０を取付け、このハウジング３０にスプール１１の２
倍の受圧面積を有するピストン３１を嵌挿して第１圧力
室３２と第２圧力室３３を形成し、そのピストン３１を
スプール１１に連結して第１圧力室３２を第１受圧部４
とし、かつ第２圧力室３３を第２受圧部５とした請求項
１記載の方向切換弁の切換装置。2. A housing 30 is attached to the valve body 10 of the directional control valve 3, and the spool 11 is attached to the housing 30.
A first pressure chamber 32 and a second pressure chamber 33 are formed by inserting a piston 31 having a double pressure-receiving area, and the piston 31 is connected to the spool 11 to connect the first pressure chamber 32 to the first pressure receiving portion 4.
The directional switching valve switching device according to claim 1, wherein the second pressure chamber 33 is the second pressure receiving portion 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992071961U JP2604486Y2 (en) | 1992-10-15 | 1992-10-15 | Switching device for directional switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992071961U JP2604486Y2 (en) | 1992-10-15 | 1992-10-15 | Switching device for directional switching valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0635604U true JPH0635604U (en) | 1994-05-13 |
| JP2604486Y2 JP2604486Y2 (en) | 2000-05-15 |
Family
ID=13475584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992071961U Expired - Fee Related JP2604486Y2 (en) | 1992-10-15 | 1992-10-15 | Switching device for directional switching valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2604486Y2 (en) |
-
1992
- 1992-10-15 JP JP1992071961U patent/JP2604486Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2604486Y2 (en) | 2000-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |