JP2020056467A - Flow regulating valve - Google Patents

Abstract

To provide a flow regulating valve which has a compact structure.SOLUTION: The present invention relates to a flow regulating valve 1 comprising: a housing 2 in a bottomed cylindrical shape having a through hole 60; a motor 4; a rotary disk 3 which is arranged opposite a bottom part 6 of the housing 2, and can regulate a valve opening formed with the through hole 60 of the housing 2 through rotation; a rotary shaft member 7 which is mounted on a rotary shaft 40 of the motor 4, and transmits driving force to the rotary disk 3 through key coupling; a spring 12 which is arranged between the rotary disk 3 and rotary shaft member 7, and energizes the rotary disk 3 toward the bottom part 6 of the housing 2; and a seal member 11 which provides sealing between an outer periphery of the rotary shaft member 7 and an inner periphery of the housing 2. The rotary disk 3 has a projection part 32 formed extending axially, and the projection part 32 has a rotary disk-side key coupling part 32b formed. The rotary shaft member 7 is provided with a recessed part 70b into which the projection part 32 is inserted axially, and also has a rotary member-side key coupling part 74 formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flow control valve for controlling a flow rate of a fluid flowing out of an outlet.

  2. Description of the Related Art In the field of controlling a fluid such as oil or water, a flow regulating valve for regulating a flow rate of a fluid is used. As an example in which such a flow rate control valve is used, the flow rate control valve is incorporated in a warm water flush toilet seat device provided with a cleaning nozzle for local cleaning, so that a user can appropriately change the flow rate of water jetted from the flush nozzle. There is something. For example, a flow control valve disclosed in Patent Literature 1 has a housing having an inlet and an outlet, and a rotary assembly that is mounted on a flow path inside the housing and can change a flow rate of a fluid flowing out of the outlet. It comprises a disk and a stepping motor for driving the rotating disk.

  The rotating disk is attached to the tip of a rotating shaft member integrally attached to the motor shaft of the stepping motor, and a spring is disposed between the rotating shaft member and the rotating disk. It is pressed against the bottom of the housing by a spring. The shaft portion of the rotation shaft member is inserted into a cylindrical portion projecting perpendicularly from the disk of the rotation disk, and a key projection protruding in the radial direction and extending in the axial direction is inserted into the shaft portion. A notch-shaped key groove in which a key projection can be inserted in the axial direction is formed in the cylindrical portion of the rotating disk. The rotating disks rotate together. Further, the rotation shaft member is formed with a protrusion extending radially from an end of the shaft portion, and the outer peripheral surface of the protrusion has the protrusion and the inner peripheral surface of the housing. A seal member for sealing the gap is provided.

  A plurality of through holes as outlets are formed in the bottom of the housing, and a plurality of through holes are also formed in the rotating disk. When the rotating disk is rotated together with the rotating shaft member by the driving of the stepping motor, the overlapping area of the through hole of the housing and the rotating disk, or the combination of the overlapping through holes changes, so that the water flowing out of the outlet is changed. The flow rate is adjusted.

JP 2008-261441 A (Page 6, FIG. 1)

  In a flow control valve as disclosed in Patent Document 1, a spring is disposed between a rotating shaft member and a rotating disk, so that sliding resistance when the rotating disk rotates is reduced. At the same time, a desired flow rate can be controlled by pressing the rotating disk against the bottom of the housing.

  Further, in such a flow control valve, in recent years, downsizing of the flow control valve has been desired along with downsizing of a device to be incorporated.

  However, in the flow control valve of Patent Document 1, the key projection and the key groove are engaged with the shaft portion of the rotating shaft member and the cylindrical portion of the rotating disk, and the shaft portion of the rotating shaft member and The cylindrical portion of the rotating disk needs a predetermined length in the axial direction, and the projecting portion of the rotating shaft member to which the sealing member is attached also needs a predetermined length in the axial direction. There has been a limit in achieving a compact structure by bringing the shaft member and the rotating disk closer in the axial direction.

  The present invention has been made in view of such a problem, and has as its object to provide a flow control valve having a compact structure.

In order to solve the above-mentioned problems, a flow control valve of the present invention is
A bottomed cylindrical housing having a through hole, a motor, and a rotating disk that is disposed to face the bottom of the housing and that can adjust a valve opening formed by the through hole of the housing by rotation; A rotating shaft member mounted on a rotating shaft of the motor and transmitting a driving force to the rotating disk by a key connection, disposed between the rotating disk and the rotating shaft member; A flow regulating valve including a spring biasing toward a bottom of the housing, and a seal member for sealing between an outer periphery of the rotating shaft member and an inner periphery of the housing,
A convex portion extending in the axial direction is formed on the rotating disk, and a rotating disk side key coupling portion is formed on the convex portion,
The rotary shaft member is provided with a concave portion into which the convex portion is inserted in the axial direction, and a rotary member-side key coupling portion is formed.
According to this feature, since the convex portion of the rotating disk is inserted in the axial direction into the concave portion provided in the seal portion of the rotating shaft member, the axial length of the convex portion in which the key coupling portion is formed is reduced. The rotating disk and the rotating shaft member are moved closer to each other in the axial direction while securing the flow rate adjusting valve, so that the flow regulating valve can be made compact.

Preferably, the convex portion is slidable in sliding contact with the inner peripheral surface of the cylindrical portion constituting the concave portion.
According to this, the inclination of the rotating disk can be regulated by the sliding contact between the inner peripheral surface of the cylindrical portion and the convex portion.

Preferably, the convex portion has a cylindrical shape, and the rotating shaft member has a shaft portion inserted into the cylindrical convex portion.
According to this, the inclination between the rotating disk and the rotating shaft member can be regulated by the contact between the inner peripheral surface of the convex portion and the shaft portion and the contact between the outer peripheral surface of the convex portion and the inner peripheral surface of the cylindrical portion.

Preferably, the rotating disk-side key connecting portion is a key groove, and the rotating member-side key connecting portion is a key protrusion.
According to this, since the key protrusion is formed to extend on the inner peripheral surface of the concave portion, a large axial engagement region between the key protrusion and the key groove can be secured.

Preferably, the key protrusion is formed integrally with the shaft portion and the cylindrical portion forming the concave portion.
According to this, the strength of the key projection is improved.

Preferably, a part of the key projection extends axially beyond the recess.
According to this, since the engagement between the key projection and the key groove can be performed outside the concave portion, the engagement is simple.

Preferably, the inner peripheral surface of the cylindrical portion constituting the concave portion is continuous in the circumferential direction.
According to this, the strength of the concave portion is improved.

FIG. 3 is a partial cross-sectional view of the flow control valve according to the embodiment of the present invention. FIG. 3 is an exploded perspective view showing a structure of a flow control valve. (A) is a view of the rotating disk viewed from below, (b) is a view of the stator viewed from below, and (c) is a perspective view of the stator viewed from the contact surface side with the rotating disk. (A) is a perspective view showing a state before connection between the motor shaft and the rotor shaft of the stepping motor, and (b) is a perspective view showing a state after connection between the motor shaft and the rotor shaft of the stepping motor. (A) is a perspective view showing a state before the connection between the rotor shaft and the rotating disk, and (b) is a perspective view showing a state after the connection between the rotor shaft and the rotating disk. It is the schematic which shows the connection state of a rotor shaft and a rotation disk. It is AA sectional drawing of FIG. FIG. 2 is a schematic cross-sectional view showing an inserted state of a convex portion and a concave portion, and is shown by a cross section different from FIG.

  Embodiments for implementing a flow control valve according to the present invention will be described below based on embodiments.

  A flow control valve according to an embodiment will be described with reference to FIGS.

  As shown in FIG. 1, a flow control valve 1 adjusts a flow rate of a fluid in the field of controlling a fluid such as oil or water. In the present embodiment, the flow control valve 1 includes a cleaning nozzle for local cleaning. A flow control valve 1 that is incorporated in a hot water flush toilet seat device and that appropriately changes the flow rate of water injected from a flush nozzle will be described.

  As shown in FIG. 1 and FIG. 2, a flow control valve 1 includes a case 2 having an inlet 21 and an outlet 22 for water (fluid), and water that is assembled inside the case 2 and flows out from the outlet 22. Rotating disk 3 capable of changing the flow rate of the motor, a stepping motor 4 as an electric motor for driving the rotating disk 3, and a driving force mounted on the motor shaft 40 of the stepping motor 4 to transmit the driving force to the rotating disk 3. It mainly comprises a rotor shaft 7 (rotating shaft member), and a spring 12 disposed between the rotating disk 3 and the rotor shaft 7 to bias the rotating disk 3 toward the bottom 2 b of the case 2. .

  The case 2 has a bottomed cylindrical shape having an accommodation recess 2 </ b> A that is open on the upper side in the axial direction and can accommodate various members such as the rotating disk 3 and the rotor shaft 7, and a wall extending in the circumferential direction. The portion 2a is provided with an inflow port 21 penetrating perpendicularly to the axial direction, and the bottom 2b is provided with a plurality of outflow ports 22 penetrating in the axial direction. The opening of the case 2 functions as an insertion port for assembling various members into the case 2.

  A stator 6 having a plurality of through-holes 60 penetrating in the axial direction and communicating with the outlet 22 is disposed on the bottom 2 b of the case 2 in the housing recess 2 </ b> A. A hole 63 that opens upward is formed in the center of the stator 6. The stator 6 has a circular shape when viewed in the axial direction, and the plurality of through holes 60 have different shapes (particularly, see FIG. 3B). Further, a tubular inner collar 8 is arranged on the opening side (upper side) of the housing recess 2A than the stator 6, and the opening of the case 2 is closed by a lid member 14. The stator 6 and the inner collar 8 are axially held and fixed by the bottom 2 b of the case 2 and the lid member 14. The case 2, the stator 6, the inner collar 8, and the lid member 14 constitute a housing that is a fixed-side member of the flow control valve 1.

  Further, a stator seal 9 is interposed between the bottom 2 b of the case 2 and the stator 6, and an O-ring 10 is interposed between the inner collar 8 and the inner peripheral surface of the case 2. .

  As shown in FIGS. 1 to 3, the rotating disk 3 includes a disk portion 31 having a circular shape as viewed in the axial direction, and a cylindrical portion (convex portion) 32 projecting from the center of the disk portion 31 in the axial direction. , And a plurality of through holes 33 penetrating in the axial direction in the disk portion 31. The plurality of through holes 33 have different shapes (particularly, see FIG. 3A).

  An insertion hole 32a penetrating in the axial direction is formed at the center of the cylindrical portion 32 in the radial direction, and the cylindrical portion 32 forming the insertion hole 32a has a key that opens upward and extends in the axial direction. A groove 32b (rotating disk-side key coupling portion) is formed (see FIG. 5).

  In addition, the rotating disk 3 and the stator 6 are configured to be overlapped with each other in the axial direction. A flow path communicating with the outlet 22 is formed. As shown in FIG. 3C, concave portions 62 having various shapes are formed on the contact surface 61 of the stator 6 with the rotating disk 3, and the rotating disk 3 rotates. Thus, the water flowing through the through-holes 60 is configured to generate various flowing resistances by slightly changing the position of the through-holes 33.

  The stepping motor 4 is attached to the case 2 together with the lid member 14, and includes a motor shaft 40 that protrudes in the axial direction in the housing recess 2 </ b> A of the case 2. A rotor shaft 7 is mounted in a state where relative rotation is regulated for transmission to the disk 3. In addition, the motor shaft 40, the rotor shaft 7, and the rotating disk 3 constitute a rotating side member of the flow control valve 1.

  The rotor shaft 7 is provided with a shaft portion 71 extending in the axial direction, a projecting portion 72 projecting radially from the upper end side of the shaft portion 71, and a sealing member 11 attached to the outer peripheral surface, and an upper end side of the projecting portion 72. And a flange portion 73 that protrudes in the outer diameter direction from the protruding portion 72. At the radial center of the upper end side of the rotor shaft 7, a concave portion 70a that is concave in the axial direction is formed, and at the lower end side of the overhanging portion 72, a concave portion 70b that is concave in the axial direction is annular so as to surround the shaft portion 71. Is formed. In other words, a cylindrical portion 76 is formed around the shaft portion 71, and a concave portion 70 b is formed inside the cylindrical portion 76. The rotor shaft 7 is provided with a key projection 74 (rotating shaft member side key coupling portion) that engages with the key groove 32 b of the rotating disk 3. The structure of the key projection 74 will be described later in detail.

  As shown in FIG. 4, the motor shaft 40 of the stepping motor 4 is inserted into the recess 70a of the rotor shaft 7, and the side surface 41 parallel to the axis of the motor shaft 40 and the side surface 75 parallel to the axis of the recess 70a. The motor shaft 40 and the rotor shaft 7 do not rotate relative to each other, that is, the motor shaft 40 and the rotor shaft 7 rotate integrally. In FIG. 4, illustration of the seal member 11 and an annular seal flange 13 to be described later is omitted for convenience of explanation.

  As shown in FIGS. 1 and 2, a seal member 11 made of an annular packing having a Y-shaped cross section is mounted on the outer peripheral surface of the overhang portion 72. And the inner peripheral surface of the inner collar 8 is sealed. An annular seal flange 13 is attached to the rotor shaft 7 on the opposite side (the other end) of the flange portion 73 across the seal member 11 in the axial direction (the other end). That is, since the flange portion 73 and the seal flange 13 are disposed on both sides of the seal member 11 in the axial direction, displacement of the seal member 11 in the axial direction is prevented. In addition, the overhang portion 72, the flange portion 73, and the seal flange 13 constitute a seal attachment portion in the rotor shaft 7.

  As shown in FIG. 5, the rotating disk 3 and the rotor shaft 7 are configured such that a shaft 71 of the rotor shaft 7 is inserted into the insertion hole 32 a of the rotating disk 3, and a key projection provided on the rotor shaft 7. When the key 74 and the key groove 32b of the rotary disk 3 are fitted, the relative rotation between the rotary disk 3 and the rotor shaft 7 is restricted. That is, the rotating disk 3 and the rotor shaft 7 are integrally rotated. The shaft 71 penetrates the insertion hole 32a, and the tip of the shaft 71 is inserted into the hole 63 of the stator 6 (see FIG. 1). In FIG. 5, the illustration of the seal member 11 and the seal flange 13 is omitted for convenience of explanation.

  Specifically, as shown in FIGS. 6 and 7, the key projection 74 of the rotor shaft 7 is formed integrally with the shaft portion 71 and the cylindrical portion 76, and extends in the axial direction to form a ridge. It is formed and inserted into the key groove 32b of the rotating disk 3 from the axial direction. In a state where the rotor shaft 7 is mounted on the rotating disk 3, the lower end of the key projection 74 protrudes below the recess 70b. 6 and 7, illustration of the seal member 11 and the seal flange 13 is omitted for convenience of explanation.

  As shown in FIG. 8, when the rotating disk 3 and the rotor shaft 7 are assembled, the cylindrical portion 32 of the rotating disk 3 has the concave portion 70b of the rotor shaft 7 inserted therein. . Specifically, the cylindrical portion 32 of the rotating disk 3 is inserted into the concave portion 70b with a gap of the dimension L1 between the upper end surface of the cylindrical portion 32 and the bottom surface of the concave portion 70b of the rotor shaft 7. The space corresponding to the dimension L2 is inserted, and an area where the rotating disk 3 and the rotor shaft 7 can move in the axial direction is secured by the gap corresponding to the dimension L1. The inner peripheral surface of the concave portion 70b of the rotor shaft 7 has substantially the same diameter as the outer peripheral surface of the cylindrical portion 32 of the rotary disk 3, and the cylindrical portion 32 slides on the inner peripheral surface of the concave portion 70b to rotate. It is slidable in the direction. Note that FIG. 8 shows a cross section having a phase different from that of FIG. 1 in order to easily understand the state in which the cylindrical portion 32 is inserted into the concave portion 70b.

  Returning to FIG. 1, the spring 12 is externally fitted to the rotor shaft 7, and is interposed between the seal flange 13 of the rotor shaft 7 and the disk portion 31 of the rotating disk 3. It is biased toward the stator 6. According to this, since the rotating disk 3 is pressed against the stator 6 by the urging force of the spring 12, the sliding resistance between the rotating disk 3 and the stator 6 is small, and the rotation of the rotating disk 3 becomes smooth. At the same time, the rotation disk 3 is prevented from being separated from the stator 6 in the axial direction, so that a desired flow rate can be controlled.

  In the flow control valve 1 configured as described above, the rotor shaft 7 and the rotary disk 3 are rotated by the driving of the stepping motor 4 and stopped at an arbitrary position, so that the through hole 33 and the through hole 60 overlap. The area or the combination of the overlapping through holes 33 and the overlapping through holes 60 will change. Thereby, the flow path from the inflow port 21 to the outflow port 22 changes, and the flow rate of the purified water flowing out of the outflow port 22 is adjusted.

  The rotation of the rotating disk 3 is stopped by giving an arbitrary pulse signal to the stepping motor 4 and rotating the motor shaft 40 to an arbitrary rotation position. Then, by changing the value of the pulse signal, the stop position of the rotating disk 3 can be changed to an arbitrary position.

  As described above, the rotating disk 3 is formed with the cylindrical portion 32 extending in the axial direction, the cylindrical portion 32 is formed with the key groove 32b, and the rotor shaft 7 is formed with the cylindrical portion 32. Is provided with a concave portion 70b in which the key protrusion 74 is inserted in the axial direction, and a key projection 74 is formed. As described above, a part of the cylindrical portion 32 of the rotating disk 3 is axially inserted into the concave portion 70b provided in the projecting portion 72 of the rotor shaft 7 and overlaps in the axial direction. The gap (dimension L1), which is a movable area with the projection 7, and the entire length (dimension L2) of the cylindrical portion 32 do not have to be disposed below the lower surface of the overhang portion 72. That is, while ensuring the axial length of the cylindrical portion 32 in which the key groove 32b is formed and the axial length of the overhang portion 72 to which the seal member 11 is attached, the rotation disk 3 and the rotor shaft 7 Can be arranged in the axial direction to make the flow control valve 1 compact in the axial direction. By securing the axial length of the cylindrical portion 32, the engagement area between the key groove 32 b and the key projection 74 of the rotor shaft 7 can be increased, so that the rotation of the rotor shaft 7 is stabilized to the rotating disk 3. You can tell.

  Further, the outer diameter of the cylindrical portion 32 has substantially the same diameter as the inner diameter of the cylindrical portion 76 constituting the concave portion 70b, and the cylindrical portion 32 is slidable in contact with the inner peripheral surface of the cylindrical portion 76. According to this, the relative inclination between the rotating disk 3 and the rotor shaft 7 can be regulated by the sliding contact between the inner peripheral surface of the cylindrical portion 76 and the outer peripheral surface of the cylindrical portion 32.

  The cylindrical portion 32 has a cylindrical shape in which an insertion hole 32a penetrating in the axial direction is formed. The rotor shaft 7 has a shaft 71 inserted into the insertion hole 32a of the cylindrical portion 32. I have. According to this, the contact between the inner peripheral surface of the insertion hole 32a and the shaft portion 71 and the contact between the outer peripheral surface of the cylindrical portion 32 and the inner peripheral surface of the cylindrical portion 76 cause relative rotation between the rotating disk 3 and the rotor shaft 7. Can be controlled.

  Further, the shaft 71 penetrates the insertion hole 32a of the rotating disk 3, and the tip of the shaft 71 is inserted into the hole 63 of the stator 6 which is a fixed side member. Is guided by the hole 63 of the stator 6 and can be accurately rotated.

  Further, since the axial length of the cylindrical portion 32 is ensured, the upper end of the insertion hole portion 32a that comes into contact with the shaft portion 71 when the rotating disk 3 and the rotor shaft 7 are relatively inclined. The distance between the edge and the lower edge can be increased, and the relative inclination between the insertion hole 32a and the shaft 71 can be easily regulated.

  In addition, a key groove 32b is formed in the cylindrical portion 32, and a key projection 74 that engages with the key groove 32b is formed on the inner peripheral surface of the concave portion 70b. According to this, since the key projection 74 is formed to extend on the inner peripheral surface of the cylindrical portion 76, the key projection 74 and the key groove 32b can be engaged at a position inside the concave portion 70b. That is, while the rotating disk 3 and the rotor shaft 7 are moved closer to each other in the axial direction to make the flow control valve 1 compact in the axial direction, a large axial engagement area between the key projection 74 and the key groove 32b is ensured. Can be.

  Further, the key projection 74 of the rotor shaft 7 is integrally formed over the shaft portion 71 and the inner peripheral surface of the cylindrical portion 76 and extends in the axial direction and is formed as a ridge. Is high. Further, since the shaft portion 71 and the inner peripheral surface of the concave portion 70b are integrated by the key protrusion 74, the operation of inserting the shaft portion 71 into the insertion hole 32a of the cylindrical portion 32 and the key protrusion 74 and the key groove 32b are involved. It is easy to perform the joining operation and the operation of inserting the cylindrical portion 32 into the recess 70b at the same time.

  In addition, since a part of the key projection 74 protrudes below the recess 70b, the protruding part of the key projection 74 is visible from the outside. That is, it is possible to insert the key protrusion 74 into the key groove 32b while visually confirming the protruding portion from the outside. That is, since the engagement operation between the key projection 74 and the key groove 32b can be performed outside the concave portion 70b, the engagement operation can be easily performed.

  Further, since the inner peripheral surface of the cylindrical portion 76 is continuous in the circumferential direction, the strength of the concave portion 70b is improved, and the concave portion 70b can be prevented from being damaged by sliding contact with the cylindrical portion 32. 32 can be guided well in the axial direction.

  As described above, the embodiments of the present invention have been described with reference to the drawings. It is.

  For example, in the above-described embodiment, the form in which the rotating disk 3 slides on the separate stator 6 provided on the bottom 2b of the case 2 is exemplified. However, the present invention is not limited to this. The disc 3 may slide on the bottom 2 b of the case 2 to adjust the valve opening of the outlet 22. Further, the form in which the through hole 60 communicating with the outlet 22 is provided in the stator 6 is exemplified, but the present invention is not limited to this, and the through hole communicating with the outlet 22 is provided in the wall 2 a of the case 2, and the rotating disk is provided. The valve opening of the through hole may be adjusted by the peripheral surface of the third hole.

  Further, in the above embodiment, the key shaft 74 is provided on the rotor shaft 7 and the key groove 32b is formed on the rotating disk 3. However, the key groove portion is provided on the rotor shaft 7, and the rotating disk 3 is provided. May be provided with a key projection. In the above-described embodiment, the key projection 74 is formed integrally with the rotor shaft 7. However, the key projection 74 may be formed of a member separate from the rotor shaft 7.

  Further, in the above-described embodiment, an example has been described in which the shaft portion 71 of the rotor shaft 7 is inserted into the insertion hole 32a of the cylindrical portion 32 of the rotating disk 3, but the rotor shaft 7 and the rotating disk 3 are keyed. If it is, the shaft portion 71 of the rotor shaft 7 may not be inserted into the insertion hole 32a of the cylindrical portion 32 of the rotating disk 3.

  In the above-described embodiment, the concave portion 70b of the rotor shaft 7 is formed by injection molding or notch, so that the inner peripheral surface of the concave portion 70b is annularly continuous in the circumferential direction. Any space may be used as long as the cylindrical portion 32 can be inserted therein. For example, the inner peripheral surface of the concave portion 70b may be divided in the circumferential direction.

  In addition, although the rotating disk 3 has an example in which the disk portion 31 that can adjust the valve opening degree that is a gap with the outflow port is illustrated, the rotating disk 3 has a shape that can adjust the valve opening degree that is the gap with the outflow port. If it is, it is not limited to a disk shape, and can be freely changed.

  In the above-described embodiment, the seal member 11 is an annular packing having a Y-shaped cross section, but may be another shape such as an O-ring or a lip seal having an O-shaped cross section. Further, in the above-described embodiment, the form in which the seal member 11 is attached to the outer peripheral surface of the rotor shaft 7 is exemplified. However, for example, the seal member 11 may be attached to the inner collar 8 side. Further, the seal member 11 may be formed integrally with the projecting portion 72 of the rotor shaft 7.

  Further, in the above-described embodiment, the form in which the spring 12 directly urges the rotating disk 3 toward the stator 6 is exemplified. However, a predetermined member is interposed between the spring 12 and the rotating disk 3, and the predetermined member is interposed therebetween. The rotating disk 3 may be indirectly biased against the stator 6. Further, the spring 12 is not limited to a coil spring, and for example, a torsion spring, a leaf spring, or the like may be used.

DESCRIPTION OF SYMBOLS 1 Flow control valve 2 Housing 2b Bottom part 3 Rotating disk 4 Stepping motor 7 Rotor shaft (rotary shaft member)
12 Spring 13 Seal flange (seal part)
21 inflow port 22 outflow port 31 disk part 32 convex part 32a insertion hole part 32b key groove part 33 through hole 70b concave part 71 shaft part 72 seal mounting part 73 overhang part 74 key projection

Claims (7)

A bottomed cylindrical housing having a through hole, a motor, and a rotating disk that is disposed to face the bottom of the housing and that can adjust a valve opening formed by the through hole of the housing by rotation; A rotating shaft member mounted on a rotating shaft of the motor and transmitting a driving force to the rotating disk by a key connection, disposed between the rotating disk and the rotating shaft member; A flow regulating valve including a spring biasing toward a bottom of the housing, and a seal member for sealing between an outer periphery of the rotating shaft member and an inner periphery of the housing,
A convex portion extending in the axial direction is formed on the rotating disk, and a rotating disk side key coupling portion is formed on the convex portion,
A flow control valve, wherein the rotating shaft member is provided with a concave portion into which the convex portion is inserted in the axial direction, and a rotating member-side key coupling portion is formed.   The flow control valve according to claim 1, wherein the convex portion is slidable in sliding contact with an inner peripheral surface of a cylindrical portion forming the concave portion.   The flow control valve according to claim 2, wherein the convex portion has a cylindrical shape, and the rotating shaft member has a shaft portion inserted into the cylindrical convex portion.   4. The flow control valve according to claim 1, wherein the pivot disk side key coupling portion is a key groove, and the pivot member side key coupling portion is a key protrusion. 5.   The flow control valve according to claim 4, wherein the key projection is formed integrally with the shaft portion and a cylindrical portion forming the concave portion.   The flow control valve according to claim 4, wherein a part of the key protrusion extends in an axial direction from the concave portion.   The flow regulating valve according to any one of claims 1 to 6, wherein an inner peripheral surface of a cylindrical portion forming the concave portion is continuous in a circumferential direction.

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