JP7325192B2 - Solenoid valve and working machine - Google Patents

Solenoid valve and working machine Download PDF

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JP7325192B2
JP7325192B2 JP2019024720A JP2019024720A JP7325192B2 JP 7325192 B2 JP7325192 B2 JP 7325192B2 JP 2019024720 A JP2019024720 A JP 2019024720A JP 2019024720 A JP2019024720 A JP 2019024720A JP 7325192 B2 JP7325192 B2 JP 7325192B2
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hole
spool
input port
valve body
chamber
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JP2020133695A (en
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仁 岩崎
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Nabtesco Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/42—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor
    • F16K31/423—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor the actuated members consisting of multiple way valves
    • F16K31/426—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor the actuated members consisting of multiple way valves the actuated valves being cylindrical sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F16K31/061—Sliding valves
    • F16K31/0613—Sliding valves with cylindrical slides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Multiple-Way Valves (AREA)

Description

本発明は、励磁電流に応じて供給する流体と他の経路からの流体とを選択的に供給するシャトル弁の機能を具備した電磁弁及びこれを備える作業機械に関する。 TECHNICAL FIELD The present invention relates to an electromagnetic valve having a shuttle valve function that selectively supplies a fluid to be supplied according to an exciting current and a fluid from another path, and a working machine having the same.

シャトル弁は２つの入力ポートと１つの出力ポートとを備え、２つの入力ポートに流入する流体のうち高圧の方の流体を選択的に出力ポートから流出させる弁である。例えば特許文献１にはシャトル弁と電磁比例弁とを備える油圧回路が開示され、この油圧回路では、電磁比例弁の２つの出力ポートから延びる２つの油路がシャトル弁に接続されている。これにより、２つの油路からの圧油のうちの圧力の高い方の圧油が選択的に圧油供給対象（主制御部）に供給される。 A shuttle valve is provided with two input ports and one output port, and selectively causes the higher pressure fluid flowing into the two input ports to flow out from the output port. For example, Patent Document 1 discloses a hydraulic circuit including a shuttle valve and an electromagnetic proportional valve. In this hydraulic circuit, two oil passages extending from two output ports of the electromagnetic proportional valve are connected to the shuttle valve. As a result, of the pressure oils from the two oil passages, the pressure oil having the higher pressure is selectively supplied to the pressure oil supply target (main control section).

特開平５－３９８８４号公報JP-A-5-39884

特許文献１の技術はシャトル弁を内蔵したブロックをスプール式電磁比例弁の径方向外側に配置し、ブロックと電磁比例弁とを一体化させる。このような構造は従来から多用されているが、電磁比例弁とシャトル弁とを含む構造体のサイズが大型化するため、配置自由度の向上や取扱い性の向上に改善の余地がある。 In the technique of Patent Document 1, a block containing a shuttle valve is arranged radially outward of a spool type solenoid proportional valve, and the block and the solenoid proportional valve are integrated. Although such a structure has been widely used in the past, the size of the structure including the electromagnetic proportional valve and the shuttle valve is increased, so there is room for improvement in the degree of freedom of arrangement and the ease of handling.

本発明は上記実情を考慮してなされたものであり、励磁電流に応じて流体の供給を制御する基本的な機能を保持しながら、シャトル弁が有する流体選択機能をコンパクトに組み込むことができる電磁弁及び作業機械を提供することを目的とする。 The present invention has been made in view of the above-mentioned circumstances, and is an electromagnetic valve that can compactly incorporate the fluid selection function of the shuttle valve while maintaining the basic function of controlling the supply of fluid in accordance with the excitation current. The purpose is to provide valves and working machines.

本発明にかかる電磁弁は、
第１入力ポートを有するスプール孔と、前記スプール孔に接続し、第２入力ポートを有する合流室とが設けられた弁本体と、
前記スプール孔の内部に配置されたスプールと、
前記スプールを軸方向に移動させる駆動部と、
前記合流室の内部に配置され、前記スプール孔から前記合流室に向かう流体の圧力が前記第２入力ポートから前記合流室に向かう流体の圧力よりも高い場合に前記第２入力ポートを閉じる移動体と、を備える。 The solenoid valve according to the present invention is
a valve body provided with a spool hole having a first input port and a confluence chamber connected to the spool hole and having a second input port;
a spool positioned inside the spool hole;
a driving unit for axially moving the spool;
A moving body disposed inside the merging chamber that closes the second input port when the pressure of the fluid flowing from the spool hole toward the merging chamber is higher than the pressure of the fluid flowing from the second input port toward the merging chamber. And prepare.

前記第２入力ポートから前記合流室に向かう流体の圧力が前記スプール孔から前記合流室に向かう流体の圧力よりも高い場合に前記移動体が前記スプール孔と前記合流室との接続を遮断してもよい。 When the pressure of the fluid flowing from the second input port to the merging chamber is higher than the pressure of the fluid flowing from the spool hole to the merging chamber, the moving body cuts off the connection between the spool hole and the merging chamber. good too.

前記スプールは、前記合流室に向けて開口する中空孔並びに前記中空孔に開口する入口孔及び出口孔を有し、前記入口孔を前記第１入力ポートに接続しかつ前記出口孔を遮断する位置と、前記入口孔を遮断する位置とに移動可能でもよい。 The spool has a hollow hole opening toward the merging chamber, an inlet hole and an outlet hole opening to the hollow hole, and a position where the inlet hole is connected to the first input port and the outlet hole is blocked. and a position blocking the entrance hole.

前記第２入力ポートは、前記軸方向に沿って前記合流室に開口するとともに前記弁本体の外部に開口してもよい。 The second input port may open to the confluence chamber along the axial direction and to the outside of the valve body.

前記弁本体は、前記スプール孔を有する第１弁箱部と、前記合流室を有する第２弁箱部とを有し、前記第２弁箱部が前記第１弁箱部に取り付けられてもよい。 The valve body has a first valve body portion having the spool hole and a second valve body portion having the confluence chamber, and the second valve body portion is attached to the first valve body portion. good.

本発明にかかる電磁弁は、電磁比例弁として構成されてもよい。 A solenoid valve according to the present invention may be configured as a proportional solenoid valve.

また、本発明にかかる電磁弁は、
第１入力ポートを有するスプール孔と、前記スプール孔に接続し、第２入力ポートを有する合流室とが設けられた弁本体と、
前記スプール孔の内部に配置されたスプールと、
前記スプールを軸方向に移動させる駆動部と、
前記合流室の内部に配置され、前記スプール孔から前記合流室に向かう流体の圧力が前記第２入力ポートから前記合流室に向かう流体の圧力よりも高い場合に前記第２入力ポートを閉じる移動体と、を備え、
前記第２入力ポートから前記合流室に向かう流体の圧力が前記スプール孔から前記合流室に向かう流体の圧力よりも高い場合に前記移動体が前記スプール孔と前記合流室との接続を遮断し、
前記スプールは、前記合流室に向けて開口する中空孔並びに前記中空孔に開口する入口孔及び出口孔を有し、前記入口孔を前記第１入力ポートに接続しかつ前記出口孔を遮断する位置と、前記入口孔を遮断する位置とに移動可能であり、
前記第２入力ポートは、前記軸方向に沿って前記合流室に開口するとともに前記弁本体の外部に開口し、
前記弁本体は、前記スプール孔を有する第１弁箱部と、前記合流室を有する第２弁箱部とを有し、前記第２弁箱部が前記第１弁箱部に取り付けられており、
電磁比例弁として構成される、電磁弁である。 Further, the solenoid valve according to the present invention is
a valve body provided with a spool hole having a first input port and a confluence chamber connected to the spool hole and having a second input port;
a spool positioned inside the spool hole;
a driving unit for axially moving the spool;
A moving body disposed inside the merging chamber that closes the second input port when the pressure of the fluid flowing from the spool hole toward the merging chamber is higher than the pressure of the fluid flowing from the second input port toward the merging chamber. and
when the pressure of the fluid flowing from the second input port to the merging chamber is higher than the pressure of the fluid flowing from the spool hole to the merging chamber, the moving body cuts off the connection between the spool hole and the merging chamber;
The spool has a hollow hole opening toward the merging chamber, an inlet hole and an outlet hole opening to the hollow hole, and a position where the inlet hole is connected to the first input port and the outlet hole is blocked. and a position that blocks the entrance hole,
the second input port opens to the confluence chamber along the axial direction and opens to the outside of the valve body;
The valve body has a first valve body portion having the spool hole and a second valve body portion having the confluence chamber, and the second valve body portion is attached to the first valve body portion. ,
A solenoid valve configured as a solenoid proportional valve.

また、本発明にかかる作業機械は、前記の電磁弁を備える。 A working machine according to the present invention includes the solenoid valve described above.

本発明にかかる電磁弁によれば、励磁電流に応じて流体の供給を制御する基本的な機能を保持しながら、シャトル弁が有する流体選択機能をコンパクトに組み込むことができる。 According to the solenoid valve of the present invention, the fluid selection function of the shuttle valve can be compactly incorporated while maintaining the basic function of controlling the supply of fluid in accordance with the excitation current.

本発明の一実施の形態にかかる電磁弁の概略的な断面図である。1 is a schematic cross-sectional view of an electromagnetic valve according to an embodiment of the invention; FIG.

以下、図面を参照しながら本発明の一実施の形態にかかる電磁弁１について説明する。図１に示される電磁弁１は、励磁電流に応じて流体としての圧油の供給及びその供給圧を制御する電磁比例弁であり、例えば油圧アクチュエータ等の油圧機器に接続されることで、所望圧の圧油を油圧機器に供給することができる。電磁弁１は、作業車両等の作業機械に組み込まれてもよい。 A solenoid valve 1 according to an embodiment of the present invention will be described below with reference to the drawings. The electromagnetic valve 1 shown in FIG. 1 is an electromagnetic proportional valve that controls the supply of pressurized oil as a fluid and the supply pressure according to the excitation current. Pressure oil can be supplied to hydraulic equipment. The solenoid valve 1 may be incorporated in a work machine such as a work vehicle.

電磁比例弁には、ポジティブタイプの電磁比例弁と、ネガティブタイプの電磁比例弁とが存在する。励磁電流が増大するに従って、出力される流体の圧力が増大する電磁比例弁はポジティブタイプの電磁比例弁に分類され、出力される流体の圧力が低下する電磁比例弁はネガティブタイプの電磁比例弁に分類される。本発明はポジティブタイプの電磁比例弁及びネガティブタイプの電磁比例弁のいずれにも適用可能であるが、電磁弁１はポジティブタイプのスプール式電磁比例弁として構成されている。 Electromagnetic proportional valves include positive type electromagnetic proportional valves and negative type electromagnetic proportional valves. Electromagnetic proportional valves that increase the output fluid pressure as the excitation current increases are classified as positive type electromagnetic proportional valves, and those that output fluid pressure decreases are classified as negative type electromagnetic proportional valves. being classified. Although the present invention can be applied to both a positive type proportional solenoid valve and a negative type proportional solenoid valve, the solenoid valve 1 is configured as a positive type spool type proportional solenoid valve.

本実施の形態にかかる電磁弁１は、スプール孔２１と合流室２２とを有する弁本体１１と、スプール孔２１の内部にスライド可能に配置された軸状部材であるスプール１２と、スプール１２を電磁力によりスプール孔２１の軸方向Ｃ１に移動させる駆動部１３と、合流室２２の内部に配置された移動体１４と、を備えている。弁本体１１において、合流室２２は軸方向Ｃ１における一方側（図面における下側）からスプール孔２１に流体的に接続している。弁本体１１は、スプール孔２１を有する円筒状の第１弁箱部１１１と、合流室２２を有する第２弁箱部１１２とを有し、第２弁箱部１１２は第１弁箱部１１１に取り付けられている。 The solenoid valve 1 according to the present embodiment includes a valve body 11 having a spool hole 21 and a merging chamber 22, a spool 12 which is a shaft-shaped member slidably arranged inside the spool hole 21, and the spool 12. A drive unit 13 for moving the spool hole 21 in the axial direction C1 by electromagnetic force, and a moving body 14 arranged inside the merging chamber 22 are provided. In the valve body 11, the confluence chamber 22 is fluidly connected to the spool hole 21 from one side (lower side in the drawing) in the axial direction C1. The valve body 11 has a cylindrical first valve body portion 111 having a spool hole 21 and a second valve body portion 112 having a confluence chamber 22 . attached to the

軸方向Ｃ１における第１弁箱部１１１の一方側の端部は円筒状であり、当該端部の外周面に第２弁箱部１１２に設けられた嵌込筒部１１２Ａが嵌め込まれることで、第２弁箱部１１２が第１弁箱部１１１に一体化される。合流室２２は、嵌込筒部１１２Ａの内側において開放し、この開放部分を介してスプール孔２１に流体的に接続している。 One end portion of the first valve body portion 111 in the axial direction C1 is cylindrical, and a fitting cylinder portion 112A provided in the second valve body portion 112 is fitted to the outer peripheral surface of the end portion, The second valve body portion 112 is integrated with the first valve body portion 111 . The merging chamber 22 is open inside the fitting cylinder portion 112A and is fluidly connected to the spool hole 21 through this open portion.

上述した軸方向Ｃ１における第１弁箱部１１１の一方側の端部の内周面には中央に連絡孔１５Ａを有する円環状の弁座部材１５が圧入状態で設けられ、合流室２２は詳しくは、弁座部材１５の連絡孔１５Ａを介してスプール孔２１内に接続している。ここで、合流室２２内の移動体１４は球体であり、連絡孔１５Ａに嵌まり込むことでスプール孔２１と合流室２２との接続を遮断することが可能となっている。 An annular valve seat member 15 having a communication hole 15A in the center is press-fitted to the inner peripheral surface of one end of the first valve box portion 111 in the axial direction C1. is connected to the inside of the spool hole 21 through the communication hole 15A of the valve seat member 15. As shown in FIG. Here, the moving body 14 in the merging chamber 22 is a sphere, and it is possible to cut off the connection between the spool hole 21 and the merging chamber 22 by fitting it into the communication hole 15A.

弁座部材１５の合流室２２側とは反対の側を向く面と、スプール１２との間にはコイルスプリングからなる弾性部材１６が設けられ、弁座部材１５はスプリング座面としても機能している。駆動部１３は軸方向Ｃ１においてスプール１２に対し合流室２２側とは反対の側に配置され、励磁電流に応じてスプール１２を合流室２２側に移動させることが可能となっている。スプール１２が合流室２２側へ移動した際には弾性部材１６が圧縮し、スプール１２を駆動部１３の側に押し戻すための付勢力が弾性部材１６に蓄えられる。 An elastic member 16 made of a coil spring is provided between the surface of the valve seat member 15 facing away from the merging chamber 22 and the spool 12, and the valve seat member 15 also functions as a spring seat surface. there is The drive unit 13 is arranged on the side opposite to the merging chamber 22 side with respect to the spool 12 in the axial direction C1, and is capable of moving the spool 12 toward the merging chamber 22 side according to the exciting current. When the spool 12 moves to the merging chamber 22 side, the elastic member 16 is compressed, and an urging force is accumulated in the elastic member 16 to push the spool 12 back toward the driving portion 13 side.

弁本体１１には上述のスプール孔２１及び合流室２２に加え、スプール孔２１に開口する第１入力ポート３１及び排出ポート３３と、合流室２２に開口する第２入力ポート３２及び出力ポート３４と、がさらに設けられている。言い換えると、スプール孔２１は第１入力ポート３１及び排出ポート３３を有しており、合流室２２は第２入力ポート３２及び出力ポート３４を有している。第１入力ポート３１及び排出ポート３３は第１弁箱部１１１に設けられ、それぞれスプール孔２１の径方向に沿ってスプール孔２１に開口するとともに第１弁箱部１１１の外周面から外部に開口している。本実施の形態では、第１入力ポート３１が軸方向Ｃ１において排出ポート３３よりも合流室２２に近い位置に配置されるが、逆の配置態様となっていてもよい。 In addition to the spool hole 21 and the merging chamber 22 described above, the valve body 11 has a first input port 31 and a discharge port 33 that open to the spool hole 21, and a second input port 32 and an output port 34 that open to the merging chamber 22. , are further provided. In other words, the spool bore 21 has a first input port 31 and a discharge port 33 and the merging chamber 22 has a second input port 32 and an output port 34 . The first input port 31 and the discharge port 33 are provided in the first valve box portion 111 and open to the spool hole 21 along the radial direction of the spool hole 21 and open to the outside from the outer peripheral surface of the first valve box portion 111 . are doing. In the present embodiment, the first input port 31 is arranged at a position closer to the confluence chamber 22 than the discharge port 33 in the axial direction C1, but the arrangement may be reversed.

一方、第２入力ポート３２及び出力ポート３４は第２弁箱部１１２に設けられる。出力ポート３４は、スプール孔２１の径方向に沿って合流室２２に開口するとともに第２弁箱部１１２の外周面から外部に開口している。第２入力ポート３２は、第２弁箱部１１２におけるスプール孔２１を向く側とは反対の側の壁部に設けられ、軸方向Ｃ１に沿って合流室２２に開口するとともに第２弁箱部１１２の外周面から外部に開口している。 On the other hand, the second input port 32 and the output port 34 are provided in the second valve body portion 112 . The output port 34 opens to the confluence chamber 22 along the radial direction of the spool hole 21 and opens to the outside from the outer peripheral surface of the second valve box portion 112 . The second input port 32 is provided on the wall portion of the second valve body portion 112 opposite to the side facing the spool hole 21, and opens into the confluence chamber 22 along the axial direction C1. The outer peripheral surface of 112 is open to the outside.

第１入力ポート３１は圧油を供給する油圧源Ｐに接続されるようになっており、排出ポート３３は圧油が排出される排液部Ｔに接続されるようになっている。また、出力ポート３４は、圧油の供給対象である例えば油圧機器Ａ１に接続されるようになっており、一方、第２入力ポート３２は、例えば油圧源Ｐとは異なる油圧源や、圧油を圧送する油路に接続されるようになっている。 The first input port 31 is connected to a hydraulic pressure source P that supplies pressure oil, and the discharge port 33 is connected to a drainage portion T that discharges the pressure oil. The output port 34 is connected to, for example, a hydraulic device A1 to which pressure oil is supplied, while the second input port 32 is connected to a hydraulic source different from the hydraulic pressure source P, for example, or a pressure oil source. is connected to an oil passage for pumping the

スプール１２には、軸方向Ｃ１に延在し且つ軸方向Ｃ１における一方側の端部が合流室２２側に向けて開口する中空孔４０と、中空孔４０に開口する入口孔４１及び出口孔４３と、が設けられている。入口孔４１及び出口孔４３は、それぞれスプール孔２１の径方向に沿って中空孔４０に開口するとともにスプール１２の外周面から外部に開口している。 The spool 12 includes a hollow hole 40 extending in the axial direction C1 and having one end in the axial direction C1 open toward the merging chamber 22, an inlet hole 41 and an outlet hole 43 opening to the hollow hole 40. and is provided. The inlet hole 41 and the outlet hole 43 open to the hollow hole 40 along the radial direction of the spool hole 21 and open to the outside from the outer peripheral surface of the spool 12 .

入口孔４１はスプール１２の軸方向Ｃ１における移動位置に応じて、第１入力ポート３１に接続するか、弁本体１１の内周面と対向するか、又は第１入力ポート３１に接続するとともに弁本体１１の内周面に対向する。入口孔４１が第１入力ポート３１に接続した際には、第１入力ポート３１に流入した圧油が、入口孔４１、中空孔４０、スプール孔２１及び連絡孔１５Ａを介して合流室２２に流入し得る。一方、出口孔４３はスプール１２の軸方向Ｃ１における移動位置に応じて、排出ポート３３に接続するか、弁本体１１の内周面と対向するか、又は排出ポート３３に接続するとともに弁本体１１の内周面に対向する。出口孔４３が排出ポート３３に接続した際には、スプール孔２１及び中空孔４０内の圧油が排液部Ｔに流出し得る状態となる。 Depending on the movement position of the spool 12 in the axial direction C1, the inlet hole 41 is connected to the first input port 31, faces the inner peripheral surface of the valve body 11, or connects to the first input port 31 and the valve. It faces the inner peripheral surface of the main body 11 . When the inlet hole 41 is connected to the first input port 31, the pressurized oil that has flowed into the first input port 31 flows through the inlet hole 41, the hollow hole 40, the spool hole 21, and the communication hole 15A into the confluence chamber 22. can flow in. On the other hand, depending on the movement position of the spool 12 in the axial direction C1, the outlet hole 43 is connected to the discharge port 33, faces the inner peripheral surface of the valve body 11, or connects to the discharge port 33 and the valve body 11. facing the inner peripheral surface of When the outlet hole 43 is connected to the discharge port 33, the pressure oil in the spool hole 21 and the hollow hole 40 can flow out to the drain portion T. As shown in FIG.

本実施の形態では、入口孔４１が第１入力ポート３１に接続した際、出口孔４３が弁本体１１の内周面と対向した状態となり、出口孔４３が排出ポート３３に接続した際には、入口孔４１が弁本体１１の内周面と対向した状態となる。したがって、スプール１２は、駆動部１３によって移動される軸方向Ｃ１における位置（移動位置）に応じて、入口孔４１を第１入力ポート３１に接続するとともに出口孔４３を排出ポート３３から遮断する状態と、出口孔４３を排出ポート３３に接続するとともに入口孔４１を第１入力ポート３１から遮断する状態とを切り換え可能となっている。 In this embodiment, when the inlet hole 41 is connected to the first input port 31, the outlet hole 43 faces the inner peripheral surface of the valve body 11, and when the outlet hole 43 is connected to the discharge port 33, , the inlet hole 41 faces the inner peripheral surface of the valve body 11 . Therefore, the spool 12 connects the inlet hole 41 to the first input port 31 and blocks the outlet hole 43 from the discharge port 33 according to the position (movement position) in the axial direction C1 moved by the drive unit 13. , and a state in which the outlet hole 43 is connected to the discharge port 33 and the inlet hole 41 is blocked from the first input port 31 .

図１は、ソレノイドアクチュエータによって構成される駆動部１３に対して励磁電流が流されていない非励磁状態を示し、スプール１２が駆動部１３によって合流室２２側に移動されていない。この際、スプール１２は出口孔４３を排出ポート３３に接続するとともに入口孔４１を遮断している。この状態から、スプール１２が合流室２２側に移動することで、入口孔４１が第１入力ポート３１に接続されるとともに出口孔４３が遮断される状態に移行する。 FIG. 1 shows a non-excited state in which an exciting current is not applied to the driving section 13 composed of a solenoid actuator, and the spool 12 is not moved by the driving section 13 toward the merging chamber 22 side. At this time, the spool 12 connects the outlet hole 43 to the discharge port 33 and blocks the inlet hole 41 . From this state, the spool 12 moves to the merging chamber 22 side, so that the inlet hole 41 is connected to the first input port 31 and the outlet hole 43 is blocked.

駆動部１３は、軸方向Ｃ１における一方側、すなわち合流室２２側にスプール１２を押圧し、印加される電流（すなわち励磁電流）に応じてスプール１２に対する押圧力が可変である。本実施形態の駆動部１３は、電磁石（図示省略）及びプランジャー５１が組み合わされたソレノイドアクチュエータによって構成されている。但し、このソレノイドアクチュエータの具体的な構成は限定されず、プランジャー５１からスプール１２に加えられる押圧力が励磁電流の大きさに応じて決定される任意のソレノイドアクチュエータにより、駆動部１３は構成され得る。 The driving unit 13 presses the spool 12 toward one side in the axial direction C1, ie, the merging chamber 22 side, and the pressing force against the spool 12 is variable according to the applied current (that is, the exciting current). The drive unit 13 of this embodiment is configured by a solenoid actuator in which an electromagnet (not shown) and a plunger 51 are combined. However, the specific configuration of this solenoid actuator is not limited, and the drive unit 13 is configured by an arbitrary solenoid actuator in which the pressing force applied from the plunger 51 to the spool 12 is determined according to the magnitude of the exciting current. obtain.

また、上述したように第２入力ポート３２には例えば油圧源Ｐとは異なる油圧源や、圧油を圧送する油路が接続される。この場合、第１入力ポート３１に流入した圧油が合流室２２に流入するのと同時に、第２入力ポート３２に流入した圧油が合流室２２に流入する状況が生じ得るが、この際、本実施の形態では合流室２２と移動体１４とがシャトル弁としての機能を発揮する。 Further, as described above, the second input port 32 is connected to, for example, a hydraulic pressure source different from the hydraulic pressure source P and an oil passage for pumping pressure oil. In this case, a situation may occur in which the pressure oil that has flowed into the first input port 31 flows into the merging chamber 22 and the pressure oil that has flowed into the second input port 32 flows into the merging chamber 22 at the same time. In this embodiment, the merging chamber 22 and the moving body 14 function as a shuttle valve.

すなわち、入口孔４１が第１入力ポート３１に接続した際に第１入力ポート３１から中空孔４０及びスプール孔２１を介して合流室２２に向かう圧油の圧力（油圧）が、第２入力ポート３２から合流室２２に向かう圧油の圧力よりも高い場合に、移動体１４は第２入力ポート３２を閉じる。一方、第２入力ポート３２から合流室２２に向かう圧油の圧力が、入口孔４１が第１入力ポート３１に接続した際に第１入力ポート３１から中空孔４０及びスプール孔２１を介して合流室２２に向かう圧油の圧力よりも高い場合に、移動体１４が弁座部材１５に着座して、スプール孔２１と合流室２２との接続を遮断する。 That is, when the inlet hole 41 is connected to the first input port 31, the pressure (hydraulic pressure) of pressure oil flowing from the first input port 31 to the confluence chamber 22 via the hollow hole 40 and the spool hole 21 is applied to the second input port. The moving body 14 closes the second input port 32 when the pressure is higher than the pressure of the pressurized oil flowing from 32 to the merging chamber 22 . On the other hand, the pressure of the pressurized oil flowing from the second input port 32 to the merging chamber 22 merges from the first input port 31 through the hollow hole 40 and the spool hole 21 when the inlet hole 41 is connected to the first input port 31. When the pressure is higher than the pressure of the pressurized oil directed to the chamber 22 , the moving body 14 is seated on the valve seat member 15 to cut off the connection between the spool hole 21 and the merging chamber 22 .

次に、電磁弁１の動作を説明する。 Next, the operation of the solenoid valve 1 will be explained.

駆動部１３に電流が印加されない場合又は駆動部１３に第１の電流が印加される場合には、スプール１２は図１に示す初期位置に配置される。この場合、スプール孔２１は出口孔４３を介して排出ポート３３に接続し、入口孔４１は第１入力ポート３１に接続せず、スプール孔２１には第１入力ポート３１からの圧油は流入しない。 When no current is applied to drive 13 or when a first current is applied to drive 13, spool 12 is placed in the initial position shown in FIG. In this case, the spool hole 21 is connected to the discharge port 33 through the outlet hole 43, the inlet hole 41 is not connected to the first input port 31, and the pressure oil from the first input port 31 flows into the spool hole 21. do not.

上記の状態から第１の電流よりも大きな第２の電流が駆動部１３に印加されると、スプール１２は、駆動部１３のプランジャー５１により軸方向Ｃ１において合流室２２側へ押され、入口孔４１が第１入力ポート３１に接続し、スプール孔２１に第１入力ポート３１からの圧油が流入する。 When a second current larger than the first current is applied to the driving portion 13 from the above state, the spool 12 is pushed toward the merging chamber 22 in the axial direction C1 by the plunger 51 of the driving portion 13, and the inlet A hole 41 is connected to the first input port 31 , and pressurized oil from the first input port 31 flows into the spool hole 21 .

ここで、第２入力ポート３２にも合流室２２に向かう圧油が供給されている際、第１入力ポート３１から中空孔４０及びスプール孔２１を介して合流室２２に向かう圧油の圧力が、第２入力ポート３２から合流室２２に向かう圧油の圧力よりも高い場合には、移動体１４が第２入力ポート３２を閉じる。一方、第２入力ポート３２から合流室２２に向かう圧油の圧力が、第１入力ポート３１から中空孔４０及びスプール孔２１を介して合流室２２に向かう圧油の圧力よりも高い場合には、移動体１４が弁座部材１５に着座して、スプール孔２１と合流室２２との接続を遮断する。これにより、第１入力ポート３１からの圧油及び第２入力ポート３２からの圧油のうちの圧力の高い方の圧油が出力ポート３４から出力されることになる。 Here, when the pressure oil directed to the merging chamber 22 is also supplied to the second input port 32, the pressure of the pressure oil directed to the merging chamber 22 from the first input port 31 through the hollow hole 40 and the spool hole 21 is increased. , the pressure of the pressure oil flowing from the second input port 32 to the merging chamber 22 , the moving body 14 closes the second input port 32 . On the other hand, when the pressure of the pressure oil flowing from the second input port 32 to the merging chamber 22 is higher than the pressure of the pressure oil flowing from the first input port 31 to the merging chamber 22 via the hollow hole 40 and the spool hole 21, , the moving body 14 is seated on the valve seat member 15 to cut off the connection between the spool hole 21 and the merging chamber 22 . As a result, the higher pressure oil out of the pressure oil from the first input port 31 and the pressure oil from the second input port 32 is output from the output port 34 .

以上に説明した本実施の形態では、励磁電流に応じてスプール１２の位置を制御することで第１入力ポート３１からの圧油の供給及び遮断を切り換えることができるとともに、第１入力ポート３１からの圧油を合流室２２に向けて供給する状態において第２入力ポート３２にも合流室２２に向かう圧油が供給されている際には、合流室２２とその内部の移動体１４とがシャトル弁として機能する。これにより、第１入力ポート３１からの圧油及び第２入力ポート３２からの圧油のうちの圧力の高い方の圧油を出力ポート３４から選択的に出力することが可能となる。 In the embodiment described above, by controlling the position of the spool 12 according to the excitation current, it is possible to switch between supplying and cutting off the pressure oil from the first input port 31, and is supplied toward the merging chamber 22, and when the second input port 32 is also supplied with pressure oil directed toward the merging chamber 22, the merging chamber 22 and the moving body 14 inside thereof are shuttled. Acts as a valve. This makes it possible to selectively output from the output port 34 the pressure oil with the higher pressure out of the pressure oil from the first input port 31 and the pressure oil from the second input port 32 .

ここで、シャトル弁の機能を発揮する合流室２２とその内部の移動体１４は、弁本体１１において弁本体１１及びスプール１２と軸方向Ｃ１において並んで設けられることで、径方向の張り出しが抑制される。これにより、本実施の形態によれば、励磁電流に応じて流体の供給を制御する基本的な機能を保持しながら、シャトル弁が有する流体選択機能をコンパクトに組み込むことができる。 Here, the merging chamber 22 that functions as a shuttle valve and the moving body 14 inside thereof are provided side by side with the valve body 11 and the spool 12 in the axial direction C1 in the valve body 11, thereby suppressing radial projection. be done. Thus, according to this embodiment, the fluid selection function of the shuttle valve can be compactly incorporated while maintaining the basic function of controlling the supply of fluid in accordance with the excitation current.

また、第２入力ポート３２は、軸方向Ｃ１に沿って合流室２２に開口するとともに弁本体１１の外部、具体的には第２弁箱部１１２の外部に開口する。この場合、第２入力ポート３２から合流室２２に向かう圧油を直線的なシンプルな油路を通して合流室２２に流入させ、当該圧油を第１入力ポート３１からの圧油と移動体１４を挟んで対向させることが可能となる。これにより、圧油（流体）の経路を複雑化することなく、シャトル弁の機能を実現することができる。 The second input port 32 opens to the confluence chamber 22 along the axial direction C<b>1 and opens to the outside of the valve body 11 , specifically the outside of the second valve box portion 112 . In this case, the pressurized oil directed from the second input port 32 to the merging chamber 22 is caused to flow into the merging chamber 22 through a simple straight oil passage, and the pressurized oil from the first input port 31 and the moving body 14 move. It is possible to sandwich and face them. As a result, the function of the shuttle valve can be realized without complicating the pressure oil (fluid) path.

また、弁本体１１はスプール孔２１を有する第１弁箱部１１１と合流室２２を有する第２弁箱部１１２とを有し、第２弁箱部１１２が第１弁箱部１１１に取り付けられている。これにより、第２弁箱部１１２における出力ポート３４及び第２入力ポート３２の形成が容易になるため、電磁弁１の作製効率を向上させることができる。 Further, the valve body 11 has a first valve body portion 111 having a spool hole 21 and a second valve body portion 112 having a confluence chamber 22 , and the second valve body portion 112 is attached to the first valve body portion 111 . ing. This facilitates the formation of the output port 34 and the second input port 32 in the second valve box portion 112, so that the manufacturing efficiency of the electromagnetic valve 1 can be improved.

以上、本発明の実施の形態を説明したが、本発明は上述の実施の形態に限定されるものではなく、上述の実施の形態においては、各種の変更が行われてもよい。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications may be made to the above-described embodiments.

例えば、上記実施の形態における弁本体１１は、第１入力ポート３１及び排出ポート３３が設けられる第１弁箱部１１１と、第２入力ポート３２及び出力ポート３４が設けられる第２弁箱部１１２とを互いに別の部材として有するが、弁本体１１は、一つの部材において、第１入力ポート３１、排出ポート３３、第２入力ポート３２及び出力ポート３４が設けられる構成を有していてもよい。 For example, the valve body 11 in the above embodiment includes a first valve box portion 111 provided with the first input port 31 and the discharge port 33 and a second valve box portion 112 provided with the second input port 32 and the output port 34. and are separate members, the valve body 11 may have a configuration in which the first input port 31, the discharge port 33, the second input port 32, and the output port 34 are provided in one member. .

１…電磁弁
１１…弁本体
１１１…第１弁箱部
１１２…第２弁箱部
１２…スプール
１３…駆動部
１４…移動体
１５…弁座部材
１５Ａ…連絡孔
１６…弾性部材
２１…スプール孔
２２…合流室
３１…第１入力ポート
３２…第２入力ポート
３３…排出ポート
３４…出力ポート
４０…中空孔
４１…入口孔
４３…出口孔
５１…プランジャー
Ｃ１…スプール孔の軸方向 DESCRIPTION OF SYMBOLS 1... Solenoid valve 11... Valve main body 111... First valve body part 112... Second valve body part 12... Spool 13... Driving part 14... Moving body 15... Valve seat member 15A... Communication hole 16... Elastic member 21... Spool hole 22... Merging chamber 31... First input port 32... Second input port 33... Discharge port 34... Output port 40... Hollow hole 41... Inlet hole 43... Outlet hole 51... Plunger C1... Axial direction of spool hole

Claims (8)

第１入力ポートを有するスプール孔と、前記スプール孔に接続し、第２入力ポートを有する合流室とが設けられた弁本体と、
前記スプール孔の内部に配置されたスプールと、
前記スプールを軸方向に移動させ、前記第１入力ポートから前記スプール孔への流体の供給及び前記第１入力ポートから前記スプール孔への流体の遮断を切り換える駆動部と、
前記合流室の内部に配置され、前記第１入力ポートから前記スプール孔に供給され、前記スプール孔から前記合流室に向かう流体の圧力が前記第２入力ポートから前記合流室に向かう流体の圧力よりも高い場合に前記第２入力ポートを閉じる移動体と、を備える電磁弁。 a valve body provided with a spool hole having a first input port and a confluence chamber connected to the spool hole and having a second input port;
a spool positioned inside the spool hole;
a driving unit that axially moves the spool and switches between supply of fluid from the first input port to the spool hole and blocking of fluid from the first input port to the spool hole;
The pressure of the fluid arranged inside the merging chamber, supplied from the first input port to the spool hole, and flowing from the spool hole toward the merging chamber is higher than the pressure of the fluid flowing from the second input port toward the merging chamber. and a moving body that closes the second input port when the current is high. 前記第２入力ポートから前記合流室に向かう流体の圧力が前記スプール孔から前記合流室に向かう流体の圧力よりも高い場合に前記移動体が前記スプール孔と前記合流室との接続を遮断する、請求項１に記載の電磁弁。 When the pressure of the fluid directed from the second input port to the merge chamber is higher than the pressure of the fluid directed from the spool hole to the merge chamber, the moving body cuts off the connection between the spool hole and the merge chamber. The solenoid valve according to claim 1. 前記スプールは、前記合流室に向けて開口する中空孔並びに前記中空孔に開口する入口孔及び出口孔を有し、前記入口孔を前記第１入力ポートに接続しかつ前記出口孔を遮断する位置と、前記入口孔を遮断する位置とに移動可能である、請求項２に記載の電磁弁。 The spool has a hollow hole opening toward the merging chamber, an inlet hole and an outlet hole opening to the hollow hole, and a position where the inlet hole is connected to the first input port and the outlet hole is blocked. 3. The solenoid valve according to claim 2, wherein the solenoid valve is movable between a position to block the inlet hole and a position to block the inlet hole. 前記第２入力ポートは、前記軸方向に沿って前記合流室に開口するとともに前記弁本体の外部に開口する、請求項１乃至３のいずれかに記載の電磁弁。 4. The solenoid valve according to any one of claims 1 to 3, wherein said second input port opens to said confluence chamber along said axial direction and opens to the outside of said valve body. 前記弁本体は、前記スプール孔を有する第１弁箱部と、前記合流室を有する第２弁箱部とを有し、前記第２弁箱部が前記第１弁箱部に取り付けられている、請求項１乃至４のいずれかに記載の電磁弁。 The valve body has a first valve body portion having the spool hole and a second valve body portion having the confluence chamber, and the second valve body portion is attached to the first valve body portion. The electromagnetic valve according to any one of claims 1 to 4. 電磁比例弁として構成される、請求項１乃至５のいずれかに記載の電磁弁。 6. A solenoid valve as claimed in any one of claims 1 to 5, configured as a proportional solenoid valve. 第１入力ポートを有するスプール孔と、前記スプール孔に接続し、第２入力ポートを有する合流室とが設けられた弁本体と、
前記スプール孔の内部に配置されたスプールと、
前記スプールを軸方向に移動させる駆動部と、
前記合流室の内部に配置され、前記スプール孔から前記合流室に向かう流体の圧力が前記第２入力ポートから前記合流室に向かう流体の圧力よりも高い場合に前記第２入力ポートを閉じる移動体と、を備え、
前記第２入力ポートから前記合流室に向かう流体の圧力が前記スプール孔から前記合流室に向かう流体の圧力よりも高い場合に前記移動体が前記スプール孔と前記合流室との接続を遮断し、
前記スプールは、前記合流室に向けて開口する中空孔並びに前記中空孔に開口する入口孔及び出口孔を有し、前記入口孔を前記第１入力ポートに接続しかつ前記出口孔を遮断する位置と、前記入口孔を遮断する位置とに移動可能であり、
前記第２入力ポートは、前記軸方向に沿って前記合流室に開口するとともに前記弁本体の外部に開口し、
前記弁本体は、前記スプール孔を有する第１弁箱部と、前記合流室を有する第２弁箱部とを有し、前記第２弁箱部が前記第１弁箱部に取り付けられており、
電磁比例弁として構成される、電磁弁。 a valve body provided with a spool hole having a first input port and a confluence chamber connected to the spool hole and having a second input port;
a spool positioned inside the spool hole;
a driving unit for axially moving the spool;
A moving body disposed inside the merging chamber that closes the second input port when the pressure of the fluid flowing from the spool hole toward the merging chamber is higher than the pressure of the fluid flowing from the second input port toward the merging chamber. and
when the pressure of the fluid flowing from the second input port to the merging chamber is higher than the pressure of the fluid flowing from the spool hole to the merging chamber, the moving body cuts off the connection between the spool hole and the merging chamber;
The spool has a hollow hole opening toward the merging chamber, an inlet hole and an outlet hole opening to the hollow hole, and a position where the inlet hole is connected to the first input port and the outlet hole is blocked. and a position that blocks the entrance hole,
the second input port opens to the confluence chamber along the axial direction and opens to the outside of the valve body;
The valve body has a first valve body portion having the spool hole and a second valve body portion having the confluence chamber, and the second valve body portion is attached to the first valve body portion. ,
A solenoid valve, configured as a solenoid proportional valve. 請求項１乃至７のいずれかに記載の電磁弁を備える作業機械。 A working machine comprising the solenoid valve according to any one of claims 1 to 7.
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