JP2020148289A - Fluid control valve - Google Patents

Abstract

To provide a fluid control valve capable of suppressing both of radial displacement of a valve portion and a shaft center inclination of the valve portion, with respect to a valve seat.SOLUTION: A fluid control valve 5 includes a valve portion 57 for opening and closing an internal passage 512 to switch a valve opening state and a valve closing state, and a valve portion supporting member 58 on which the valve portion 57 is mounted. The fluid control valve 5 includes a plunger 55 axially driving the valve portion supporting member 58, and a yoke 56 forming a magnetic circuit together with the plunger 55 in energization. The fluid control valve 5 includes a first sliding supporting portion 514 radially supporting the valve portion supporting member 58, and a second sliding supporting portion 542 radially supporting the plunger 55. The first sliding supporting portion 514 radially supports the valve portion supporting member 58 at a region different from the second sliding supporting portion 542.SELECTED DRAWING: Figure 2

Description

The disclosure herein relates to a fluid control valve.

The solenoid valve of Patent Document 1 holds the first valve member in the closed position and the second valve member in the open position by a spring force in a non-energized state. In this state, the first channel and the second channel are connected. In the energized state, the first valve member is held in the open position by the magnetic force resisting the spring force, and the third channel and the second channel are connected.

International Publication No. 2015/082456

The solenoid valve of Patent Document 1 includes a valve stem, an armature fixed to the valve stem, and a first valve member and a second valve member fixed to the valve stem. From this configuration, if the valve stem is installed in a state where the axis of the valve stem is displaced or tilted in the radial direction from the proper position, the valve portion will be in the same state as the valve stem, and the valve closing force will be unstable. There are concerns.

An object of the disclosure in this specification is to provide a fluid control valve capable of suppressing both the radial displacement of the valve portion and the axial inclination of the valve portion with respect to the valve seat.

The plurality of aspects disclosed herein employ different technical means to achieve their respective objectives. Further, the scope of claims and the reference numerals in parentheses described in this section are examples showing the correspondence with the specific means described in the embodiment described later as one embodiment, and limit the technical scope. is not.

One of the disclosed fluid control valves is a housing (51) having an internal passage (512) through which the working fluid flows, an open state that allows the flow of the working fluid, and a closed valve that blocks the flow of the working fluid. A valve portion (57) that opens and closes an internal passage so as to switch to a state, a valve portion support member (58; 158) to which the valve portion is mounted or a part of the valve portion, and a valve portion support member in the axial direction. A magnetic circuit is formed with the plunger (55; 155) to be driven, a coil portion (540) that generates a magnetic force to drive the plunger in the axial direction when energized to switch between a valve open state and a valve closed state, and a plunger when energized. The yoke (56; 156), the first sliding support portion (514; 1514; 2514) that supports the valve portion support member that moves in the axial direction in the radial direction, and the plunger that moves in the axial direction are first slid. A second sliding support portion (542) that supports in the radial direction at a portion different from the dynamic support portion is provided.

According to this fluid control valve, the valve portion support member provided with the valve portion is movably supported in the axial direction by a sliding support portion different from the plunger. As a result, since the sliding shaft related to the valve portion support member and the sliding shaft related to the plunger are independent, it is possible to operate in a state where they are not easily affected by the radial position and inclination of the axial centers of each other. From the above, it is possible to provide a fluid control valve capable of suppressing both the radial position deviation of the valve portion and the axial inclination of the valve portion with respect to the valve seat.

It is a block diagram which shows the cooling water circuit which concerns on 1st Embodiment. It is sectional drawing which showed the valve open state about the fluid control valve of 1st Embodiment. It is sectional drawing which showed the valve closed state about the fluid control valve of 1st Embodiment. It is sectional drawing which shows the valve part support member and the sliding support part which concerns on 1st Embodiment. It is sectional drawing which showed the valve open state about the fluid control valve of 1st Embodiment. It is sectional drawing which showed the valve closed state about the fluid control valve of 1st Embodiment. It is an enlarged view explaining the magnetic path on the upstream side between a yoke and a plunger in the valve open state. It is an enlarged view explaining the magnetic path on the upstream side between a yoke and a plunger in a valve closed state. It is an enlarged view explaining the magnetic path on the downstream side between a yoke and a plunger in the valve open state. It is an enlarged view explaining the magnetic path on the downstream side between a yoke and a plunger in a valve closed state. It is a characteristic figure which shows the relationship between the stroke and the suction force about the 1st path and the 2nd path. It is sectional drawing which shows the valve part support member and the sliding support part which concerns on 2nd Embodiment. It is sectional drawing which showed the valve closed state about the fluid control valve of 3rd Embodiment. It is sectional drawing which showed the valve open state about the fluid control valve of 4th Embodiment.

A plurality of embodiments for carrying out the present disclosure will be described below with reference to the drawings. In each form, the same reference numerals may be attached to the parts corresponding to the matters described in the preceding forms, and duplicate explanations may be omitted. When only a part of the configuration is described in each form, the other forms described above can be applied to the other parts of the configuration. Not only the combinations of the parts that clearly indicate that they can be combined in each embodiment, but also the parts of the embodiments that are not explicitly combined unless there is a problem in the combination. It is also possible.

(First Embodiment)
A first embodiment that discloses an example of a fluid control valve will be described with reference to FIGS. 1 to 11. The fluid control valve 5 of the first embodiment is installed in the cooling water circuit 1. The working fluid controlled by the fluid control valve 5 is, for example, a liquid such as gas, water, or oil. The cooling water circuit 1 shown as an example is a circuit in which engine cooling water circulates. The cooling water circuit 1 has a function of efficiently warming and cooling the engine 2 provided in the vehicle. The cooling water circuit 1 includes an engine 2, a pump 3, a first flow path 10, a second flow path 11, a third flow path 12, a switching valve 4, a heater core 6, a fluid control valve 5, a radiator 7, a control device 8, and the like. I have.

As shown in FIG. 1, the cooling water flows out from the pump 3, flows through the engine 2, the first flow path 10, the second flow path 11, and the third flow path 12, and returns to the pump 3. The control device 8 has at least one arithmetic processing unit and at least one memory device as a storage medium for storing programs and data. The control device 8 is provided by, for example, a microcomputer having a storage medium readable by a computer. A storage medium is a non-transitional substantive storage medium that stores a computer-readable program non-temporarily. The storage medium may be provided by a semiconductor memory, a magnetic disk, or the like. The control device 8 may be provided by one computer, or a set of computer resources linked by a data communication device. The program is executed by the control device 8 to cause the control device 8 to function as the device described in this specification. The program, by being executed by the controller 8, causes the controller 8 to perform the methods described herein. In the control device 8, functional units for performing various processes for warming up and cooling the engine 2 are constructed by hardware, software, or both.

The pump 3 is a device that interlocks with the operation of the engine 2 so as to drive the cooling water when the engine 2 is in the operating state. The pump 3 operates when the engine 2 is in the operating state to circulate the cooling water, and does not operate when the engine 2 is in the stopped state. As the pump 3, for example, a mechanical variable flow rate pump that operates by rotating an engine is used. The pump 3 may be a device that uses an electric motor as a drive source and can operate and stop regardless of the operating state of the engine 2. In this case, the pump 3 can change the amount of the fluid to be discharged by the control of the control device 8.

The first flow path 10 is a flow path for flowing the fluid flowing out of the engine 2 into the engine 2 via the pump 3. The first flow path 10 is a flow path in which the fluid circulates through the engine 2, the switching valve 4, and the pump 3 without passing through the heater core 6 and the radiator 7. A flow path for circulating cooling water is formed inside the engine 2. The cooling water circulating inside the engine 2 absorbs the heat of the engine 2 to raise its own temperature, thereby lowering the internal temperature of the engine 2. The second flow path 11 is a flow in which the cooling water flowing out of the engine 2 branches from the upstream portion of the first flow path 10 and returns to the downstream portion of the first flow path 10 via the fluid control valve 5 and the heater core 6. It's a road. A fluid control valve 5 and a heater core 6 are provided in the second flow path 11. The third flow path 12 is a flow path that branches from the upstream portion of the second flow path 11 that is on the upstream side of the fluid control valve 5 and returns to the downstream portion of the first flow path 10 via the radiator 7. ..

A radiator 7 is provided in the third flow path 12. A switching valve 4 is provided at the confluence portion where the third flow path 12 is connected to the first flow path 10 on the downstream side. The switching valve 4 is configured so that the flow path of the cooling water flowing out of the engine 2 can be switched between the first state and the second state. The first state is a state in which the first flow path 10 and the third flow path 12 are not communicated with each other so that the cooling water circulates in the first flow path 10. The second state is a state in which all three passages connected by the switching valve 4 are opened. The switching valve 4 is, for example, a device that switches the flow path to the second state when the cooling water satisfies a predetermined temperature condition, and switches the flow path to the first state when the predetermined temperature condition is not satisfied. The switching valve 4 can be configured by, for example, a thermostat valve. The valve opening degree of the switching valve 4 changes according to the amount of heat applied to the temperature-sensitive wax or the cooling water temperature.

The fluid control valve 5 is provided on the upstream side or the downstream side of the heater core 6 in the second flow path 11, and its opening degree can be switched between two states, a valve closed state and a valve open state. When the fluid control valve 5 is in the closed state, the cooling water does not flow to the second flow path 11 in the first state but flows only to the first flow path 10. When the fluid control valve 5 is in the valve open state, the cooling water flows in both the first flow path 10 and the second flow path 11 in the first state. As described above, the second flow path 11 and the third flow path 12 are configured in parallel with the first flow path 10.

The control device 8 controls the fluid control valve 5 based on the temperature of the cooling water detected by the cooling water temperature sensor. After the engine 2 is started, if the cooling water temperature is lower than the predetermined first temperature, the switching valve 4 maintains the first state, and the control device 8 controls the fluid control valve 5 to the closed state. Since the cooling water circulates only in the first flow path 10, warming up of the engine 2 is promoted.

When the cooling water temperature becomes the first temperature or higher, the warm-up control of the engine 2 is terminated. When the cooling water temperature becomes higher than the second temperature set to be higher than the first temperature, the switching valve 4 switches to the second state. The cooling water circulates in the third flow path 12, and the cooling water is dissipated in the radiator 7. When the energization is cut off by the control device 8 and the fluid control valve 5 is controlled to the valve open state, the cooling water circulates in the second flow path 11, and the cooling water is also dissipated in the heater core 6. Further, in the first state, when heat dissipation from the cooling water is required in the heater core 6, the control device 8 may cut off the energization to control the fluid control valve 5 to the valve open state.

As another form, the cooling water circuit 1 described above may have only a path in which the fluid flowing out from the engine 2 returns to the engine via the heater core 6 and the radiator 7. That is, the cooling water circuit 1 may not have the first flow path 10. The control device 8 may be configured to control the fluid control valve 5 based on the detection value of the engine oil temperature or the oil temperature of a transmission or the like.

The fluid control valve 5 will be described with reference to FIGS. 2 to 11. 2 and 5 show the valve open state. 3 and 6 show the valve closed state. The fluid control valve 5 includes a valve seat 511, a valve portion 57, a valve portion support member 58, a plunger 55, an electromagnetic solenoid portion 54, a first sliding support portion 514, a second sliding support portion 542, and the like. The fluid control valve 5 is a solenoid valve device having a configuration in which the pressure of the working fluid acts in the valve opening direction in which the valve portion 57 is separated from the valve seat 511. The fluid control valve 5 is a solenoid valve device in which the valve closing direction of the valve portion 57 is set in a direction that opposes the fluid pressure. The fluid control valve 5 opens and closes an internal passage 512 provided in the housing according to the magnitude relationship between the fluid pressure received from the working fluid and the magnetic force generated by energization. The housing forms the outer shell of the fluid control valve 5 and includes a plurality of combined dividing members. The fluid control valve 5 is a device that switches between a valve opening state in which the fluid passage is opened and a valve closed state in which the fluid passage is closed, with the direction opposite to the pressure acting direction of the working fluid flowing inside as the valve closing direction.

The valve portion support member 58 and the plunger 55 are separate members. The valve portion support member 58 and the plunger 55 are not fixed to each other. The plunger 55 is also a movable core. The plunger 55 includes a tubular portion 551 with both ends open in the axial direction. The plunger 55 includes an upstream annular portion 550 provided at one end of the tubular portion 551 on the valve portion 57 side, and a downstream annular portion 552 provided at the other end of the tubular portion 551. .. The upstream annular portion 550 has the same diameter dimension as the tubular portion 551, and has an upstream opening 550a coaxial with the tubular portion 551 as a through hole. Coaxial in the scope of this specification or claims means that a plurality of members or parts are coaxial or substantially coaxial. The upstream annular portion 550 contacts the downstream end of the valve support member 58 and supports the valve support member 58 so as to be displaced in the axial direction. The axial direction is also the moving direction of the plunger 55 and the valve portion 57. The valve portion support member 58 is displaced in the axial direction together with the plunger 55.

The upstream annular portion 550 may be configured to support the valve portion support member 58 in the axial direction in a form in which the valve portion support member 58 is not in direct contact with the valve portion support member 58. In this case, the upstream annular portion 550 is indirectly in contact with the valve portion support member 58 via inclusions. Further, the upstream annular portion 550 and the valve portion support member 58 may be configured so that they do not come into contact with each other in the process of the valve opening state and the valve closing state. In this case, the upstream annular portion 550 and the valve portion support member 58 shift from a separated state to a state of direct or indirect contact in the valve closed state. The upstream annular portion 550 is configured to support the valve portion support member 58 at least in the valve closed state.

The downstream annular portion 552 is a flange-shaped portion having a diameter larger than that of the tubular portion 551 and extending radially in a direction orthogonal to the tubular portion 551. The downstream annular portion 552 is provided with a downstream opening that is coaxial with the tubular portion 551 on the inside. A fluid passage 553 is provided inside the tubular portion 551. The fluid passage 553 has an upstream opening 550a as a fluid inflow port. The plunger 55 is made of a material that conducts magnetism, for example, a magnetic material.

The valve portion support member 58 is integrally formed with the valve portion 57 by mounting the valve portion 57. The valve portion support member 58 includes an upstream side plate portion 580, a plurality of upstream side leg portions 582, and a plurality of downstream side leg portions 583. The upstream side plate portion 580 is a portion integrally provided at the upstream end portion of the upstream side leg portion 582, and forms, for example, a disk-shaped portion. A valve portion 57 is attached to the upstream side plate portion 580. The valve portion 57 may be configured to be a part of the valve portion support member 58, and in this case, the valve portion support member 58 can be interpreted as a valve body including the valve portion.

The plurality of upstream leg portions 582 are arranged at intervals in the circumferential direction at the outer peripheral edge portion of the upstream side plate portion 580, and each extends from the upstream side plate portion 580 to the plunger 55 side. A fluid passage 581 is provided between the adjacent upstream leg 582 and the upstream leg 582. The valve portion support member 58 is provided with at least one fluid passage 581 so as to penetrate in the radial direction. The fluid passage 581 communicates with the internal passage 512 on the upstream side and communicates with the fluid passage 553 via the upstream opening 550a on the downstream side.

As shown in FIGS. 2 and 3, the downstream leg portion 583 is a portion integrally provided at the downstream end portion of the upstream leg portion 582 and further extending from the upstream leg portion 582 to the plunger 55 side. The downstream leg portion 583 is a portion having a smaller outer diameter than the upstream leg portion 582. The downstream leg portion 583 is slidably supported in the axial direction in a state of being inserted into the opening 560a provided in the upstream first annular portion 560 of the yoke 56.

The valve portion support member 58 is regulated to be further displaced in the valve opening direction when the downstream end portion of the upstream side leg portion 582 contacts the upstream side first annular portion 560 in the valve opening state. Therefore, the downstream leg portion 583 can be displaced within a predetermined range in the axial direction by the yoke 56, and is restricted to be substantially immovable in the radial direction. The upstream first annular portion 560 of the yoke 56 is a portion that radially supports the downstream leg portion 583 that moves in the axial direction. Supporting in the radial direction in this way means that the upstream first annular portion 560 supports the downstream leg portion 583 so as to regulate the radial movement. According to this configuration, the yoke 56 is also a first sliding support portion that supports the valve portion support member 58 that moves in the axial direction in the radial direction. The valve portion support member 58 is made of a material such as a resin material that does not easily conduct magnetism. Therefore, the valve portion support member 58 is configured so as not to form a magnetic circuit.

The valve portion 57 is made of an elastically deformable material such as rubber. The valve portion 57 is integrally mounted on the valve portion support member 58 in a state where the shaft portion 571 extending downstream in the axial direction is fitted in the through hole of the upstream side board portion 580. The valve portion 57 is provided at a position axially opposed to the valve seat 511 provided in the inflow side housing 51.

The valve portion support member 58 is supported by the first sliding support portion 514 in a state where it can be displaced in the axial direction. The first sliding support portion 514 partially supports the outer peripheral surface of the valve portion support member 58. The first sliding support portion 514 supports the valve portion support member 58 in the radial direction so as to move in the axial direction with respect to the housing. Supporting in the radial direction in this way means that the first sliding support portion 514 supports the valve portion support member 58 so as to regulate the movement in the radial direction. The first sliding support portion 514 regulates the radial movement by at least temporarily or partially contacting the valve portion support member 58 in the radial direction during the valve opening operation and the valve closing operation. The first sliding support portion 514 is a part of the housing. The first sliding support portion 514 is a portion fixedly installed in the fluid control valve 5. Further, the first sliding support portion 514 may be, for example, a component separate from the housing and may be housed in the housing.

As shown in FIG. 4, the inflow side housing 51 includes a plurality of first sliding support portions 514 that support the outer peripheral edge of the upstream side leg portion 582. The first sliding support portion 514 is a portion of the fluid control valve 5 provided in a specific part. The first sliding support portion 514 is a portion different from the second sliding support portion 542, which is provided as a part of the inflow side housing 51. The plurality of first sliding support portions 514 are arranged at positions that support the outer peripheral edge of the upstream leg portion 582 at intervals in the circumferential direction. The first sliding support portion 514 has an axial length that allows the outer peripheral edge of the upstream leg portion 582 to be supported by the inner peripheral edge in both the valve open state and the valve closed state.

The plurality of first sliding support portions 514 support the valve portion support member 58 so that the central axis of the plurality of first sliding support portions 514 is coaxial with the axis of the valve portion support member 58. The inner wall surface of the first sliding support portion 514 faces the outer peripheral surface of the upstream side leg portion 582. The plurality of first sliding support portions 514 may be configured to partially contact and support the outer peripheral surface of the valve portion support member 58.

As shown in FIG. 4, the first sliding support portion 514 is provided with a convex portion 514a that is convex on the inner diameter side or the axial center side on the inner wall surface facing the outer peripheral surface of the upstream side leg portion 582. The upstream leg portion 582 is provided with a recess 582a that is concave on the inner diameter or on the axial side on the outer peripheral wall surface facing the inner peripheral wall surface of the first sliding support portion 514. By fitting and sliding the convex portion 514a and the concave portion 582a, the upstream leg portion 582 can slide in the axial direction with respect to the first sliding support portion 514. The convex portion 514a and the concave portion 582a are in a relationship of being fitted in a slidable axial length in both the valve open state and the valve closed state. The axial length of the convex portion 514a and the axial length of the concave portion 582a may be about the same, or one may be longer than the other.

The fluid control valve 5 includes a plurality of engaging portions of the convex portion 514a and the concave portion 582a arranged in the circumferential direction. This engaging portion is provided on all or at least one of the plurality of upstream leg portions 582 and the first sliding support portion 514 of the fluid control valve 5. The configuration in which the convex portion 514a and the concave portion 582a engage with each other restricts the upstream leg portion 582 from rotating about the axis with respect to the first sliding support portion 514. When the valve portion support member 58 rotates clockwise in the state shown in FIG. 4, the left-handed portion of the convex portions on both sides of the concave portion 582a collides with the convex portion 514a. When the valve portion support member 58 rotates counterclockwise in the state shown in FIG. 4, the right-handed portion of the convex portions on both sides of the concave portion 582a collides with the convex portion 514a. In this way, regardless of whether the valve portion support member 58 rotates counterclockwise or clockwise, the engaging portion between the convex portion 514a and the concave portion 582a constitutes a rotation blocking mechanism portion that functions as a stopper.

The cross-sectional shapes of the convex portion 514a and the concave portion 582a are not limited to the shapes shown in FIG. The cross-sectional shape of the engaging portion between the convex portion 514a and the concave portion 582a may be a shape that has an effect of preventing the rotation of the upstream leg portion 582 with respect to the first sliding support portion 514. For example, the cross-sectional shape of the engaging portion may be rectangular, wedge-shaped, polygonal, semicircular, or semi-tracked.

As described above, the convex portion 514a and the concave portion 582a form a sliding portion between the upstream side leg portion 582 and the first sliding support portion 514. Further, the sliding portion between the upstream leg portion 582 and the first sliding support portion 514 may have a shape in which the surfaces do not rub against each other but rub against each other by points or lines.

The inflow side housing 51 includes a plurality of first sliding support portions 514, and an outer wall portion 513 that connects the adjacent first sliding support portions 514 and the first sliding support portion 514. The outer wall portion 513 forms a part of the housing and is integrally formed with the plurality of first sliding support portions 514. The fluid control valve 5 has a plurality of branch passages 515 in the inflow side housing 51. The branch passage 515 is a passage located between the adjacent first sliding support portion 514 and the first sliding support portion 514. The branch passage 515 is a passage surrounded by an outer wall portion 513 on the outer diameter and two first sliding support portions 514 in the circumferential direction. The branch passage 515 leads to the fluid passage 581 on the inner diameter or on the axial side.

With this configuration, the working fluid that has passed through the inflow port 510 in the valve open state shown in FIG. 5 is divided from the internal passage 512 into a plurality of branch passages 515 and flows down to the downstream side of the valve portion 57. The working fluid divided into the plurality of branch passages 515 merges inside the plurality of downstream leg portions 583, flows into the fluid passage 553 through the opening 560a, and flows out from the outflow port 530.

The fluid control valve 5 includes a housing that forms an internal passage 512 for the working fluid. The housing includes an inflow side housing 51, an outflow side housing 53, and an intermediate housing 52 that connects the inflow side housing 51 and the outflow side housing 53. The inflow side housing 51 is a first housing which is a part of the housing forming the outer shell of the fluid control valve 5. The intermediate housing 52 is a second housing which is a part of the housing forming the outer shell of the fluid control valve 5. The outflow side housing 53 is a third housing which is a part of the housing forming the outer shell of the fluid control valve 5. The inflow side housing 51 is provided with an inflow port 510 into which the working fluid flows. The downstream side of the inflow side housing 51 is integrally provided with the intermediate housing 52, and contains a valve portion 57, most of the valve portion support member 58, and the like. The inflow side housing 51 includes a valve seat 511 in which a valve portion 57 displaced in the valve closing direction is seated around the inflow port 510. In the valve closed state, the valve seat 511 is preferably in contact with the valve portion 57 so as to form an annular surface or an annular wire.

The outflow side housing 53 is provided with an outflow port 530. The upstream side of the outflow side housing 53 is integrally provided with the intermediate housing 52. The outflow port 530 communicates with the fluid passage 553 at the upstream end. The inflow side housing 51, the intermediate housing 52, and the outflow side housing 53 are made of a resin material and are welded together.

The intermediate housing 52 contains a yoke 56, a plunger 55, a coil portion 540, a bobbin 541, a second sliding support portion 542, and the like. The yoke 56 is fixedly installed in the housing of the fluid control valve 5. The yoke 56 is made of a material that conducts magnetism, for example, a magnetic material. The yoke 56 constitutes a part of the magnetic circuit, and supports the bobbin 541 and the second sliding support portion 542 inside the intermediate housing 52. The yoke 56 is provided so as to cover the outer peripheral side of the bobbin 541 and the coil portion 540. The plunger 55, the coil portion 540, the bobbin 541, the second sliding support portion 542, the valve portion support member 58, and the valve portion 57 are installed so that their axes are coaxial. The second sliding support portion 542 is a portion fixedly installed in the fluid control valve 5.

The second sliding support portion 542 is a member of a tubular body. The second sliding support portion 542 supports the bobbin 541 on the outside and the outer surface of the tubular portion 551 of the plunger 55 on the inside so that the plunger 55 can slide in the axial direction. The second sliding support portion 542 is a portion that supports the plunger 55 in the radial direction, and is provided in a specific part of the fluid control valve 5. Supporting in the radial direction in this way means that the second sliding support portion 542 supports the plunger 55 so as to regulate the movement in the radial direction. The second sliding support portion 542 regulates the radial movement by at least temporarily or partially contacting the plunger 55 in the radial direction during the valve opening operation and the valve closing operation. The second sliding support portion 542 supports the plunger 55 in the radial direction at a radial position located outside the fluid passage 553 provided inside the plunger 55.

The second sliding support portion 542 supports the plunger 55, which moves in the axial direction, in the radial direction at a position axially separated from the first sliding support portion 514. The second sliding support portion 542 supports the plunger 55 in the radial direction at a radial position different from that of the first sliding support portion 514. The second sliding support portion supports the plunger 55, which moves in the axial direction, in the radial direction at a portion different from that of the first sliding support portion. The second sliding support portion 542 is a portion that is built in the intermediate housing 52 and is different from the first sliding support portion 514. The second sliding support portion 542 is a separate component from the first sliding support portion 514. The second sliding support portion 542 is made of a non-magnetic material that does not easily allow magnetic flux to pass through. Further, the second sliding support portion 542 may be, for example, a part of the housing. The valve portion support member 58 and the plunger 55 are supported by the first sliding support portion 514 and the second sliding support portion 542 so that they can slide with each other in a radial direction.

The electromagnetic solenoid portion 54 includes a yoke 56, a coil portion 540, a bobbin 541, a second sliding support portion 542, a connector, and the like. The connector is provided so as to be located on the side or outside of the yoke 56. The connector is provided to energize the coil portion 540. The terminal terminal inside the connector is electrically connected to the coil portion 540. The electromagnetic solenoid unit 54 can control the current energized in the coil unit 540 by electrically connecting the terminal terminal to a current control device or the like with a connector. The bobbin 541 is formed of a resin material in a cylindrical shape, and a coil portion 540 is wound around the outer peripheral surface. The coil unit 540 generates a magnetic force that drives the plunger 55 in the axial direction when energized in order to switch between the valve open state and the valve closed state.

The yoke 56 is a tubular body having both ends open in the axial direction. The yoke 56 includes an upstream first annular portion 560, an inclined portion 561, an upstream second annular portion 562, and a downstream tubular portion 563. The upstream first annular portion 560 is provided at one end of the yoke 56 on the valve portion 57 side. The upstream first annular portion 560 is provided so as to be in axial contact with the upstream annular portion 550 of the plunger 55. The upstream first annular portion 560 has an opening 560a having a diameter larger than that of the upstream annular portion 550 and coaxial with the upstream opening 550a of the plunger 55 as a through hole.

The upstream-side first annular portion 560 and the upstream-side annular portion 550 form parallel portions that face each other in the axial direction and have a cross-sectional shape that follows each other. Hereinafter, the cross-sectional shape related to the inclined portion and the parallel portion is a vertical cross-sectional shape along the axial direction of the plunger or the like. The upstream first annular portion 560 and the upstream annular portion 550 are provided on the plunger 55 and the yoke 56 so as to form a magnetic path through which the magnetic flux passes between the plunger 55 and the yoke 56.

The upstream first annular portion 560 is provided so that the downstream side surface 560b opposite to the valve portion 57 contacts the upstream side surface 550b located on the valve portion 57 side of the upstream annular portion 550 in a closed state. The valve closed state is a state in which the internal passage 512 is closed so as to block the flow of the working fluid. The valve closed state includes not only a state in which the valve portion 57 and the valve seat 511 are in contact with each other, but also a state in which the valve portion 57 and the valve seat 511 are not in contact with each other but are blocking the flow of the working fluid.

The downstream side surface 560b and the upstream side surface 550b are portions facing each other in the axial direction and form parallel portions along each other. In the valve closed state shown in FIGS. 3 and 6, a magnetic path, which is a second path through which magnetic flux passes, is formed in a portion where the upstream first annular portion 560 and the upstream annular portion 550 come into contact with each other. The upstream annular portion 550 corresponds to a plunger parallel portion that is one of the parallel portions in the valve closed state. The upstream first annular portion 560 corresponds to a yoke parallel portion which is the other of the parallel portions in the valve closed state. The upstream first annular portion 560 and the upstream annular portion 550 are portions that face each other in the axial direction and are orthogonal to the axial direction. The upstream annular portion 550 is a movable upstream annular portion that extends so as to intersect the tubular portion 551 and is provided on the plunger 55 on the upstream side of the working fluid with respect to the tubular portion 551. The upstream-side first annular portion 560 is a fixed-side upstream annular portion provided on the yoke 56 on the upstream side of the working fluid with respect to the movable-side upstream annular portion.

The upstream side annular portion 550 and the upstream side first annular portion 560 may be configured not to come into direct contact with each other in the valve closed state. In this case, the upstream annular portion 550 is indirectly in contact with the upstream first annular portion 560 via the inclusions so as to form a magnetic path through the inclusions. The inclusions are, for example, non-magnetic materials. The inclusions are objects through which magnetic flux passes between the upstream annular portion 550 and the upstream first annular portion 560 in the valve closed state. The inclusions may be magnetic.

The inclined portion 561 is a tubular portion having a shape in which the end portion on the valve portion 57 side is connected to the upstream side first annular portion 560 and the end portion on the plunger 55 side is connected to the upstream side second annular portion 562. The inclined portion 561 is a tubular portion whose diameter increases from the upstream side to the downstream side. The inclined portion 561 is a portion having a cross-sectional shape that is inclined with respect to the tubular portion 551 of the plunger 55. The inclined portion 561 is formed so that the upstream end portion has a smaller diameter dimension than the downstream end portion. Therefore, the inclined portion 561 is inclined with respect to the tubular portion 551 so that the diameter becomes larger toward the downstream side or the plunger 55 side.

The end portion of the inclined portion 561 on the upstream side or the valve portion 57 side has a larger diameter than the tubular portion 551. The tubular portion 551, particularly the upstream portion thereof, is provided so that the distance from the inclined portion 561 gradually decreases as the valve is moved from the valve open state to the valve closed state. When energization is started in the valve open state, as shown in FIG. 7, the distance between the plunger 55 and the yoke 56 on the upstream side is the shortest between the inclined portion 561 and the tubular portion 551. As described above, in the valve open state, the magnetic flux, which is the first path through which the magnetic flux passes between the inclined portion 561 and the tubular portion 551, becomes larger than that of the above-mentioned second path. When energization is started in the valve open state, the first path forms a magnetic path with a larger magnetic flux than the second path, and in the valve closed state, the second path forms a magnetic path with a larger magnetic flux than the first path. To do.

The upstream second annular portion 562 extends radially from the downstream end of the inclined portion 561 in the yoke 56. The downstream tubular portion 563 extends axially from the outer peripheral edge of the upstream second annular portion 562 in the yoke 56. The upstream-side second annular portion 562 is a flange-shaped portion having a diameter larger than that of the downstream end portion of the inclined portion 561 and extending radially in a direction orthogonal to the downstream-side tubular portion 563. The upstream side second annular portion 562 has a cross-sectional shape parallel to the upstream side first annular portion 560. The inner peripheral surface of the downstream end tubular portion 565 is in a positional relationship facing the outer peripheral edge of the downstream annular portion 552 in the axial direction in the valve closed state and the valve open state. When energized, a magnetic path through which magnetic flux passes is also formed between the downstream tubular portion 563 and the outer peripheral edge of the downstream annular portion 552.

As shown in FIGS. 7 to 10, the fluid control valve 5 is provided with a first path and a second path passing between the plunger 55 and the yoke 56 on both one end side and the other end side in the axial direction. There is. The yoke 56 includes a downstream end tubular portion 565 and a downstream annular portion 564 that connects the downstream end tubular portion 565 and the downstream side tubular portion 563. The downstream end tubular portion 565 has a cross-sectional shape that is provided at the downstream end on the other end side in the axial direction and extends in the axial direction. The downstream annular portion 564 extends radially from the downstream end of the downstream tubular portion 563 and is integrated with the downstream end tubular portion 565 on the outer peripheral side. The downstream annular portion 552 is provided at a position where the upstream side surface 552b on the valve portion 57 side comes into contact with the downstream side surface 564b of the downstream annular portion 564 in the valve closed state. The downstream side surface 564b is a surface of the downstream annular portion 564 located on the side opposite to the valve portion 57 side. The downstream side surface 564b and the upstream side surface 552b are portions facing each other in the axial direction and form parallel portions along each other. The downstream annular portion 552 corresponds to a plunger parallel portion which is one of the parallel portions in the valve closed state. The downstream annular portion 564 corresponds to the yoke parallel portion, which is the other side of the parallel portion in the valve closed state.

As shown in FIG. 9, when the valve is open and energized, magnetic flux is generated in the first path between the downstream annular portion 552 and the downstream end tubular portion 565 at the downstream end of the plunger 55 and the yoke 56. Pass. The distance between the plunger 55 and the yoke 56 on the downstream side in the valve open state is the shortest between the downstream annular portion 552 and the downstream end tubular portion 565.

When the valve-opened state shown in FIG. 9 approaches the closed state and the valve-closed state shown in FIG. 10 is reached, a reversal phenomenon occurs in which the second path becomes more dominant than the first path. This is because the downstream annular portion 552 and the downstream annular portion 564 forming parallel portions are in contact with each other, or are closest to each other between the plunger 55 and the yoke 56 on the downstream side. On the downstream side, the portion between the downstream annular portion 552 and the downstream annular portion 564 is the portion having the smallest magnetic resistance and the portion having the largest magnetic flux.

The fluid control valve 5 also changes on the downstream side so that the suction force of the plunger 55 becomes larger in the second path immediately before the valve closed state in which the stroke is small, as in the characteristic diagram of FIG. The fluid control valve 5 is provided on the downstream side with a configuration in which the valve portion 57 is attracted to the valve seat 511 by the second path, so that the valve portion 57 can be shut off against the fluid pressure acting on the valve portion 57. According to this, the suction holding force at the time of valve closing can be strengthened.

As shown in FIG. 11, the suction force for sucking the plunger 55 is larger in the first path than in the second path from the valve open state to the valve closed state. Further, this suction force has a characteristic that a reversal phenomenon occurs immediately before the valve closed state and the second path is larger than the first path in the valve closed state. In the valve open state when energized as shown in FIG. 7, the first path indicated by the solid line arrow becomes the dominant magnetic path than the second path indicated by the broken line arrow. This is because the inclined portion 561 and the tubular portion 551 are the shortest distances between the plunger 55 and the yoke 56, the portions having the minimum magnetic resistance, and the portions having the maximum magnetic flux. Therefore, in the fluid control valve 5, the suction force for sucking the plunger 55 is larger in the first path than in the second path in the valve open state where the stroke is large, as in the characteristic diagram of FIG. By adopting a configuration in which the fluid control valve 5 starts suction in the first path, the plunger 55 can be sucked against the fluid pressure acting on the valve portion 57. Therefore, the fluid control valve 5 can enhance the suction performance at the start of energization.

When the valve open state shown in FIG. 7 approaches the valve closed state and the valve closed state shown in FIG. 8 is reached, a reversal phenomenon occurs in which the second path becomes more dominant than the first path. This is because the upstream annular portion 550 and the upstream first annular portion 560 forming parallel portions are in contact with each other or are closest to each other between the plunger 55 and the yoke 56. Therefore, the portion between the upstream side annular portion 550 and the upstream side first annular portion 560 is a portion having the smallest magnetic resistance and the largest magnetic flux. Similar to the characteristic diagram of FIG. 11, the fluid control valve 5 changes so that the suction force of the plunger 55 becomes larger in the second path immediately before the valve closed state in which the stroke is small. By adopting a configuration in which the valve portion 57 is attracted to the valve seat 511 by the second path, the fluid control valve 5 can shut off the valve portion 57 against the fluid pressure acting on the valve portion 57. Therefore, the suction holding force at the time of valve closing can be strengthened. As described above, the fluid control valve 5 provides a solenoid valve having advantageous characteristics related to the attractive force of both the first path and the second path shown in FIG.

Next, the action and effect brought about by the fluid control valve 5 of the first embodiment will be described. The fluid control valve 5 includes a housing having an internal passage 512 through which a working fluid flows, and a valve portion 57 that opens and closes the internal passage 512 so as to switch between a valve open state and a valve closed state. The fluid control valve 5 includes a valve portion support member 58 to which the valve portion 57 is mounted or a part of the valve portion 57, and a plunger 55 that drives the valve portion support member 58 in the axial direction. The fluid control valve 5 includes a coil portion 540 that generates a magnetic force that drives the plunger 55 in the axial direction when energized, and a yoke 56 that forms a magnetic circuit together with the plunger when energized. The fluid control valve 5 includes a first sliding support portion that supports the valve portion support member 58 that moves in the axial direction in the radial direction, and a second sliding support portion that supports the plunger 55 in the radial direction. The second sliding support portion supports the plunger 55, which moves in the axial direction, in the radial direction at a portion different from that of the first sliding support portion.

According to the fluid control valve 5, the valve portion support member 58 including the valve portion 57 is supported so as to be movable in the axial direction by a sliding support portion at a portion different from that of the plunger 55. The fluid control valve 5 includes a sliding shaft of the valve portion support member 58 regulated by the first sliding support portion and a sliding shaft of the plunger 55 regulated by the second sliding support portion. That is, the fluid control valve 5 includes a separate and independent sliding shaft of the valve portion support member 58 and a sliding shaft of the plunger 55. With these two independent sliding shafts, the valve portion support member 58 and the plunger 55 can be operated in a state where they are not easily affected by the radial position and inclination of the axial centers of each other. For example, even if the axial center of the plunger 55 deviates or tilts from the appropriate position, the axial center of the valve portion support member 58 can be set to an appropriate position by the first sliding support portion. Based on the above, it is possible to provide the fluid control valve 5 capable of suppressing both the positional deviation of the valve portion 57 with respect to the valve seat 511 in the radial direction and the inclination of the axial center.

The valve portion support member 58 is supported in a state of being movable in the radial direction with respect to the plunger 55. According to this configuration, the sliding shaft of the valve portion support member 58 is set so as to be movable in the radial direction with respect to the sliding shaft of the plunger 55. Therefore, a fluid control valve 5 capable of operating the valve portion support member 58 and the plunger 55 in a state of being less affected by the radial position and inclination of the axial centers of each other can be obtained.

The housing forming the outer shell of the fluid control valve 5 is formed to include a plurality of combined dividing members. What is a dividing member having a first sliding support part built-in or a part having a first sliding support part and a dividing member having a second sliding support part built-in or having a second sliding support part partly? , A separate member. According to this configuration, the first sliding support portion and the second sliding support portion are incorporated in the combined separate dividing members or have as a part of the separate dividing members. As a result, the axis of the plunger 55 and the axis of the valve portion support member 58 can be managed by a housing member of a separate component, so that two independent sliding axis can be easily formed.

The first sliding support portion is a portion of the plurality of divided members provided in the inflow side housing having the inflow port 510. According to this configuration, the first sliding support portion is provided as a part of the inflow side housing, and the second sliding support portion is incorporated in a separate dividing member or has a part of the separate dividing member. As a result, the axis of the valve support member 58 can be managed by the inflow side housing, so that the fluid control valve 5 that forms the sliding axis of the valve support member 58 on the upstream side can be provided.

The fluid control valve 5 includes a rotation blocking mechanism portion that prevents the valve portion supporting member 58 from rotating with respect to the first sliding support portion. According to this configuration, it is possible to provide the fluid control valve 5 that prevents the valve portion support member 58 from being erroneously assembled to the first sliding support portion. Further, it is possible to provide a fluid control valve 5 that prevents the valve portion support member 58 from performing unnecessary operations in the circumferential direction.

The rotation blocking mechanism portion includes an engaging portion between the first sliding support portion and the valve portion support member 58. According to this configuration, the fluid control valve 5 in which the valve portion support member 58 operates properly with respect to the first sliding support portion can be provided by assembling the engaging portion appropriately.

The fluid control valve 5 includes a plurality of first sliding support portions arranged around the axis of the valve portion support member 58. The fluid control valve 5 is located between the adjacent first sliding support portion and the first sliding support portion in the circumferential direction, and is provided a plurality of branch passages 515 outside the diameter of the valve portion support member 58. To be equipped with. The working fluid that has passed through the internal passage 512 is diverted to the plurality of branch passages 515 in the valve open state.

According to this configuration, since the valve portion support member 58 is supported in the radial direction at a plurality of portions arranged in the circumferential direction, a stable sliding shaft of the valve portion support member 58 can be provided. Further, since the plurality of branch passages 515 can be formed outside the diameter of the valve portion support member 58, the cross-sectional area of the flow path of the working fluid flowing down in the valve open state can be expanded. This makes it possible to provide the fluid control valve 5 in which the flow resistance of the working fluid that has passed through the opened internal passage 512 is suppressed.

The fluid control valve 5 includes a fluid passage 553 through which the working fluid flows down inside the plunger 55. The working fluids that have passed through the plurality of branch passages 515 merge and flow down the fluid passage 553. According to this configuration, the working fluid that has passed through the opened internal passage 512 can flow down to the fluid passage 553 inside the plunger 55 with suppressed flow resistance. Further, the working fluid flowing down the fluid passage 553 can provide a fluid control valve 5 that alleviates heat generated from the coil portion 540 and the plunger 55 due to energization.

The fluid control valve 5 is provided on the plunger 55 and the yoke 56 so as to form a magnetic path through which magnetic flux passes between the yoke 56 and the plunger 55, and includes parallel portions having a cross-sectional shape along each other. In the valve closed state, the plunger parallel portion, which is one of the parallel portions, contacts the yoke parallel portion, which is the other of the parallel portions, or contacts via inclusions so as to form a magnetic path. In the valve closed state, the plunger 55 further supports the valve portion support member 58 in the axial direction.

According to the fluid control valve 5, the plunger parallel portion directly or indirectly contacts the yoke parallel portion in the closed state. Therefore, the suction holding force of the plunger 55 and the yoke 56 can be strengthened. In the valve closed state, the plunger 55 further supports the valve portion support member 58 in the axial direction. Therefore, the axial position of the valve portion 57 can be maintained in an appropriate state with reference to the yoke parallel portion. From the above, it is possible to provide the fluid control valve 5 capable of achieving stable magnetic attraction and valve closing force when the valve is closed.

In the closed state, the valve portion 57 and the valve seat 511 are in close contact with each other. In the valve closed state, the plunger parallel portion contacts the yoke parallel portion or indirectly so as to form a magnetic path through inclusions. In the valve closed state, the plunger 55 supports the valve portion support member 58 in the axial direction.

According to this configuration, the valve portion 57 can be brought into close contact with the valve seat 511 in a state where the suction holding force of the plunger and the yoke can be secured and the axial position of the valve portion 57 can be properly maintained. The fluid control valve 5 can exert a stable magnetic attraction force and valve closing force when the valve is closed.

In the valve closed state, the valve portion support member 58 is axially supported by the plunger parallel portion. According to this configuration, the valve portion support member 58 can be supported by the plunger parallel portion in a state of being attracted to the yoke parallel portion. Therefore, the supporting force for supporting the valve portion support member 58 can be strengthened, and the function of maintaining the axial position of the valve portion 57 when the valve is closed can be enhanced.

The plunger parallel portion extends intersecting the tubular portion 551 and includes a movable upstream annular portion on the upstream side of the working fluid with respect to the tubular portion 551. The yoke parallel portion includes a fixed-side upstream annular portion on the upstream side of the working fluid with respect to the movable-side upstream annular portion. According to this configuration, the movable upstream annular portion directly or indirectly contacts the fixed upstream annular portion in the valve closed state. Therefore, since the mechanism portion for strengthening the suction holding force of the plunger 55 and the yoke 56 can be installed at a position close to the valve portion 57, it is possible to provide a magnetic attraction force that easily affects the valve closing force.

The yoke parallel portion and the plunger parallel portion are portions that face each other in the axial direction and are orthogonal to the axial direction. According to this configuration, since the magnetic attraction force can be applied in the direction perpendicular to the parallel portion, it is possible to provide the fluid control valve 5 capable of enhancing the attraction force.

The fluid control valve 5 includes a valve portion 57 that opens and closes the internal passage 512 so as to switch between the valve open state and the valve closed state, and the pressure of the working fluid acts in the valve opening direction. The fluid control valve 5 includes a first path, which is a magnetic path through which magnetic flux passes between the plunger 55 and the yoke 56. The fluid control valve 5 includes a second path, which is a magnetic path through which magnetic flux passes between the plunger 55 and the yoke 56 at a portion different from the first path. When energization is started in the valve open state, the first path forms a magnetic path in which the magnetic flux is larger than that of the second path. When the valve is closed, the second path forms a magnetic path in which the magnetic flux is larger than that of the first path.

According to the fluid control valve 5, when energization is started in the valve open state, the plunger 55 can be started to be sucked against the fluid pressure by utilizing the driving force generated by the magnetic path passing through the first path. Further, the plunger 55 can be attracted so as to maintain the valve closed state by utilizing the driving force generated by the magnetic path passing through the second path in the process of the valve portion 57 from the valve opened state to the valve closed state. The magnetic path passing through the first path becomes dominant when energization is started in the valve open state. As a result, it is possible to obtain a driving force for moving the valve portion 57 in the valve closing direction against the pressure of the working fluid by exerting a suction force for sucking the plunger 55 toward the valve seat 511 side. Since the valve can be brought to the closed state while the fluid pressure is acting on the valve portion 57, the fluid control valve 5 whose energization timing is not limited can be provided.

In the closed state, the magnetic path passing through the second path becomes dominant. As a result, the internal passage 512 can be closed by exerting an attractive force that keeps the valve portion 57 in contact with the valve seat 511. Due to this effect, both the valve closing operation from the valve opening state and the maintenance of the valve closing state can be performed without relying on the urging force such as a spring. Therefore, it is possible to suppress the increase in size of the device due to the provision of the spring and the strengthening of the urging force. Based on the above, it is possible to provide the fluid control valve 5 that can improve the valve closing performance and suppress the increase in size when the valve is closed against the pressure of the working fluid.

The first path is a part of one of the plunger 55 and the yoke 56, and magnetic flux passes between the inclined portion 561 and the other portion having a cross-sectional shape inclined with respect to the other portion of the plunger 55 and the yoke 56. It is a magnetic path. The second path is a magnetic path through which magnetic flux passes through parallel portions of the plunger 55 and the yoke 56 that face each other in the axial direction and have a cross-sectional shape that follows each other. This parallel portion is composed of an upstream annular portion 550 of the plunger 55 and an upstream first annular portion 560 of the yoke 56.

According to this configuration, since the inclined portion 561 is provided, it is possible to form a first path having a larger magnetic flux than the second path passing through the parallel portion of the plunger 55 and the yoke 56 at the start of energization in the valve open state. In the process from the valve open state to the valve closed state, it is possible to switch to the second path in which the overlapping area or contact area between the plunger 55 and the yoke 56 is large and the magnetic flux is large depending on the parallel portion. In this way, the shape of the plunger 55 and the yoke 56 is devised to construct the magnetic path. Thereby, it is possible to provide the fluid control valve 5 capable of performing the valve closing operation from the valve opening state and the maintenance of the valve closing state without relying on the urging force such as a spring.

According to the fluid control valve 5, the plunger 55 includes a tubular portion 551 extending in the axial direction. The yoke 56 includes an inclined portion 561 having a cross-sectional shape that is inclined with respect to the tubular portion 551. The parallel portion includes an upstream side annular portion 550 provided on the upstream side of the tubular portion 551 and an upstream side first annular portion 560 provided on the upstream side of the working fluid with respect to the inclined portion 561. According to this, since the inclined portion 561 with respect to the tubular portion 551 is provided on the yoke 56, the inner diameter of the tubular portion 551 can be increased. Therefore, when a configuration in which the fluid passage 553 is provided inside the tubular portion 551 is adopted, the fluid control valve 5 capable of suppressing the flow resistance of the working fluid can be provided.

The fluid control valve 5 includes a fluid passage 553 through which the working fluid flows inside the plunger 55. According to this configuration, it is possible to provide the fluid control valve 5 in which the heat generated from the plunger 55 due to energization can be alleviated by the working fluid.

The fluid control valve 5 includes a fluid passage 553 inside the coil portion 540 and inside the plunger 55 through which the working fluid flows. According to this configuration, it is possible to provide the fluid control valve 5 in which the heat generated from the coil portion 540 and the plunger 55 due to energization can be alleviated by the working fluid.

The second path is formed at a portion where the plunger 55 and the yoke 56 come into contact with each other in the valve closed state. According to this, the fluid control valve 5 can provide an attractive force that closes the valve portion 57 against the fluid pressure acting on the valve portion 57, and can enhance the adsorption holding force when the valve is closed.

Since the fluid control valve 5 forms a magnetic circuit with the plunger 55 and the yoke 56, it contributes to suppressing the number of parts of the device and further suppresses the air gap in the magnetic circuit.

The fluid control valve 5 may be controlled to a maximum voltage at the start of energization or at the start of suction in the valve open state, and may be controlled to a voltage smaller than that at the start of suction at the time of holding suction in the closed state. When this control is adopted, the above-mentioned first path and second path are formed. Thereby, it is possible to provide the fluid control valve 5 that can satisfy the suction start and the suction holding even if the energization voltage is suppressed.

(Second Embodiment)
The second embodiment will be described with reference to FIG. The fluid control valve 5 of the second embodiment is different from the first embodiment in the configuration relating to the engaging portion between the first sliding support portion 1514 and the upstream leg portion 1582. The configurations, actions, and effects that are not particularly described in the second embodiment are the same as those in the first embodiment, and the differences from the first embodiment will be described below.

The valve portion support member 158 is supported by the first sliding support portion 1514 in a state where it can be displaced in the axial direction. The first sliding support portion 1514 partially supports the outer peripheral surface of the valve portion support member 158. The first sliding support portion 1514 supports the valve portion support member 158 so as to move in the axial direction with respect to the housing. The first sliding support portion 1514 is a part of the housing. The first sliding support portion 1514 is a portion fixedly installed in the fluid control valve 5.

As shown in FIG. 12, the inflow side housing 51 includes a plurality of first sliding support portions 1514 that support the outer peripheral edge of the upstream side leg portion 1582. The plurality of first sliding support portions 1514 are arranged at positions that support the outer peripheral edge of the upstream leg portion 1582 at intervals in the circumferential direction. The first sliding support portion 1514 has an axial length that allows the outer peripheral edge of the upstream leg portion 1582 to be supported by the inner peripheral edge in both the valve open state and the valve closed state.

The plurality of first sliding support portions 1514 support the valve portion support member 158 so that the central axis of the plurality of first sliding support portions 1514 is coaxial with the axis of the valve portion support member 158. The inner wall surface of the first sliding support portion 1514 faces the outer peripheral surface of the upstream side leg portion 1582. The plurality of first sliding support portions 1514 may be configured to partially contact and support the outer peripheral surface of the valve portion support member 158.

The first sliding support portion 1514 is provided with a recess 514b having a concave diameter on the outer side of the inner wall surface facing the outer peripheral surface of the upstream leg portion 1582. The upstream leg portion 1582 is provided with a convex portion 582b that is convex outward in diameter on the outer peripheral wall surface facing the inner peripheral wall surface of the first sliding support portion 1514. By fitting the concave portion 514b and the convex portion 582b and sliding, the upstream leg portion 1582 can slide in the axial direction with respect to the first sliding support portion 1514. The concave portion 514b and the convex portion 582b are in a relationship of being fitted in a slidable axial length in both the valve open state and the valve closed state. The axial length of the concave portion 514b and the axial length of the convex portion 582b may be about the same, or one of them may be longer than the other.

The fluid control valve 5 includes a plurality of engaging portions of the concave portion 514b and the convex portion 582b arranged in the circumferential direction. The configuration in which the concave portion 514b and the convex portion 582b are fitted regulates that the upstream leg portion 1582 rotates about the axis with respect to the first sliding support portion 1514. When the valve portion support member 158 rotates clockwise in the state shown in FIG. 12, the right-handed portion of the convex portions on both sides of the concave portion 514b collides with the convex portion 582b. When the valve portion support member 158 rotates counterclockwise in the state shown in FIG. 12, the counterclockwise portion of the convex portions on both sides of the concave portion 514b collides with the convex portion 582b. In this way, regardless of whether the valve portion support member 158 rotates counterclockwise or clockwise, the engaging portion between the concave portion 514b and the convex portion 582b constitutes a rotation blocking mechanism portion that functions as a stopper.

The inflow side housing 51 includes a plurality of first sliding support portions 1514, and an outer wall portion 513 that connects the adjacent first sliding support portions 1514 and the first sliding support portion 1514. The outer wall portion 513 forms a part of the housing and is integrally formed with the plurality of first sliding support portions 1514. The fluid control valve 5 of the second embodiment also has a plurality of branch passages 515 in the inflow side housing 51. The branch passage 515 is a passage located between the adjacent first sliding support portion 1514 and the first sliding support portion 1514. The branch passage 515 is a passage surrounded by an outer wall portion 513 on the outer diameter and two first sliding support portions 1514 in the circumferential direction.

(Third Embodiment)
The third embodiment will be described with reference to FIG. The fluid control valve 5 of the third embodiment is different from the first embodiment in that the coil portion 540 is closed when the coil portion 540 is not energized. The configurations, actions, and effects that are not particularly described in the third embodiment are the same as those in the first embodiment, and the differences from the first embodiment will be described below.

The fluid control valve 5 of the third embodiment includes a so-called normally closed valve portion drive structure. The fluid control valve 5 includes a yoke 156 and a plunger 155 having a positional relationship in which the upstream side portion and the downstream side portion are reversed with respect to the yoke 56 and the plunger 55 of the first embodiment. The fluid control valve 5 includes an urging member 59 that urges the plunger 155 to the upstream side or the valve portion 57 side. According to the configuration provided in the fluid control valve 5, it contributes to increasing the diameter dimension of the valve seat 511 or the seal diameter of the valve portion 57.

(Fourth Embodiment)
A fourth embodiment will be described with reference to FIG. The fluid control valve 5 of the fourth embodiment is different from the first embodiment in that the component having the first sliding support portion 2514 is the intermediate housing 52. The configurations, actions, and effects that are not particularly described in the fourth embodiment are the same as those in the first embodiment, and the differences from the first embodiment will be described below.

The fluid control valve 5 of the fourth embodiment includes a first sliding support portion 2514. The fluid control valve 5 includes an intermediate housing 52 containing a valve portion 57 and a valve portion support member 58. The first sliding support portion 2514 is a part of the housing.

The valve portion support member 58 is supported by the first sliding support portion 2514 in a state where it can be displaced in the axial direction. The first sliding support portion 2514 supports the valve portion support member 58 in the radial direction so as to move in the axial direction with respect to the housing, as in the first embodiment.

The intermediate housing 52 includes a plurality of first sliding support portions 2514 that support the outer peripheral edge of the upstream side leg portion 582, similarly to the first sliding support portion 514 of the first embodiment. The first sliding support portion 2514 is a portion of the fluid control valve 5 provided in a specific part. The first sliding support portion 2514 is a portion different from the second sliding support portion 542 provided as a part of the intermediate housing 52.

The fluid control valve 5 includes an engaging portion similar to that of the first embodiment. This engaging portion is provided on all or at least one of the plurality of upstream leg portions 582 and the first sliding support portion 2514 of the fluid control valve 5.

(Other embodiments)
Disclosure of this specification is not limited to the illustrated embodiments. The disclosure includes exemplary embodiments and modifications by those skilled in the art based on them. For example, the disclosure is not limited to the combination of parts and elements shown in the embodiment, and can be implemented in various modifications. Disclosure can be carried out in various combinations. Disclosures can have additional parts that can be added to the embodiments. The disclosure includes parts and elements of the embodiment omitted. Disclosures include replacements or combinations of parts, elements between one embodiment and the other. The technical scope disclosed is not limited to the description of the embodiments. The technical scope disclosed is indicated by the description of the scope of claims, and should be understood to include all changes within the meaning and scope equivalent to the description of the scope of claims.

The fluid control valve 5 that can achieve the object disclosed in the specification includes a plurality of or a single first sliding support portion. The plurality or single first sliding support portions have a function of supporting the valve portion support member 58 so that the central axis thereof is coaxial with the axis of the valve portion support member 58.

In the fluid control valve 5, the radial position where the second sliding support portion supports the plunger and the radial position where the first sliding support portion supports the valve portion support member may be the same position.

The fluid control valve 5 may be configured to include a second sliding support portion 542 and a first sliding support portion 514, which are different portions or different portions provided in the same component.

The fluid control valve 5 is not limited to a configuration including a yoke parallel portion and a plunger parallel portion, which are portions orthogonal to the axial direction. The fluid control valve 5 capable of achieving the object includes, for example, a configuration including a yoke parallel portion and a plunger parallel portion, which are portions that intersect so as to be inclined with respect to the axial direction.

In the above-described embodiment, the valve portion is a member mounted on the valve portion support member driven by the plunger, but the fluid control valve is not limited to this embodiment. For example, the valve portion 57 may be a member integrally provided with the valve portion support member, or may be a portion forming a part of the valve portion support member.

The fluid control valve 5 that can achieve the object disclosed in the specification is not limited to the solenoid valve that can control the flow rate of the cooling water in the cooling water circuit 1 in which the cooling water of the engine 2 circulates. The fluid control valve 5 can be used, for example, as a solenoid valve that controls the flow rate of a working fluid that can cool a motor, an inverter, a semiconductor device, or the like. The fluid control valve 5 can be used, for example, as a solenoid valve that controls the flow rate of a hydraulic fluid used for cooling or heating, or a solenoid valve that controls the flow of hydraulic oil such as automatic oil.

5 ... Fluid control valve, 51 ... Inflow side housing (housing)
55, 155 ... Plunger, 56, 156 ... Yoke, 57 ... Valve 58, 158 ... Valve support member, 512 ... Internal passage,
514, 1514, 2514 ... 1st sliding support part, 514a ... Convex part (rotation blocking mechanism part)
514b ... Recessed (rotation blocking mechanism), 515 ... Branch passage, 540 ... Coil 542 ... Second sliding support, 582a ... Recessed (rotation blocking mechanism)
582b ... Convex part (rotation blocking mechanism part)

Claims (9)

A housing (51) having an internal passage (512) through which the working fluid flows,
A valve portion (57) that opens and closes the internal passage so as to switch between a valve open state that allows the flow of the working fluid and a valve closed state that blocks the flow of the working fluid.
A valve portion support member (58; 158) to which the valve portion is mounted or a part of the valve portion is formed.
A plunger (55; 155) that drives the valve portion support member in the axial direction and
A coil portion (540) that generates a magnetic force that drives the plunger in the axial direction when energized to switch between the valve open state and the valve closed state.
A yoke (56; 156) that forms a magnetic circuit together with the plunger when energized.
A first sliding support portion (514; 1514; 2514) that supports the valve portion support member that moves in the axial direction in the radial direction, and
A second sliding support portion (542) that supports the plunger moving in the axial direction in the radial direction at a portion different from the first sliding support portion.
A fluid control valve equipped with. The fluid control valve according to claim 1, wherein the valve portion support member is supported in a state of being movable in the radial direction with respect to the plunger. A first path (551, 561; 555; 552, 565), which is a magnetic path through which magnetic flux passes between the plunger and the yoke,
A second path (550, 560; 552, 564), which is a magnetic path through which magnetic flux passes between the plunger and the yoke at a site different from the first path,
With
When energization is started in the valve open state, the first path forms a magnetic path in which the magnetic flux is larger than that of the second path, and in the valve closed state, the second path is larger than the first path. The fluid control valve according to claim 1 or 2, which also forms a magnetic path in which the magnetic flux becomes large. The housing is formed to include a plurality of combined dividing members.
The dividing member having the first sliding support portion as a built-in or part of the first sliding support portion, and the second sliding support portion having the second sliding support portion built-in or as a part thereof. The fluid control valve according to any one of claims 1 to 3, which is a separate member from the split member. The fluid control valve according to claim 4, wherein the first sliding support portion is a portion of a plurality of divided members provided in an inflow side housing having an inflow port (510). The fluid control according to any one of claims 1 to 5, further comprising a rotation blocking mechanism portion (514a, 582a; 514b, 582b) for blocking the rotation of the valve portion supporting member with respect to the first sliding support portion. valve. The fluid control valve according to claim 6, wherein the rotation blocking mechanism portion includes an engaging portion between the first sliding support portion and the valve portion support member. A plurality of the first sliding support portions arranged around the axis of the valve portion support member, and
In the circumferential direction, it is located between the adjacent first sliding support portion and the first sliding support portion and is provided outside the diameter of the valve portion support member, and the internal passage is provided in the valve open state. Multiple branch passages (515) through which the working fluid that has passed through is diverged, and
The fluid control valve according to any one of claims 1 to 7. A fluid passage (553) through which the working fluid flows is provided inside the plunger.
The fluid control valve according to claim 8, wherein the working fluids that have passed through the plurality of branch passages merge and flow down the fluid passages.

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