JP6942605B2 - Fluid control valve - Google Patents

Description

The present invention relates to a fluid control valve that regulates the amount of fluid flowing in the main flow path.

Conventionally, as such a fluid control valve, an intake control device including a throttle body provided with an intake passage, a throttle valve for adjusting the amount of intake air flowing through the intake passage, and an electric motor for driving the throttle valve has been known. (See, for example, Patent Document 1).

In the intake control device of Patent Document 1, an electric motor and a gear mechanism for transmitting the driving force of the electric motor to the throttle valve are housed in a resin case attached to the throttle body. The case is attached to the throttle body by bolting two sets of ear pieces that are in contact with each other of the throttle body and the case.

Japanese Unexamined Patent Publication No. 2008-232056

However, according to the intake control device of Patent Document 1, the case is attached to the throttle body by fastening two sets of ear pieces with bolts outside them. For this reason, the space around the case and the throttle body is eroded by the two sets of ear pieces and the like, so there is room for improvement from the viewpoint of space saving.

An object of the present invention is to provide a fluid control valve capable of achieving more space saving around the case and the body in view of the problems of the prior art.

The fluid control valve according to the first invention is
A metal body with a main flow path for fluid flow and
A valve body that adjusts the cross-sectional area of the flow path in the main flow path to adjust the amount of fluid flowing in the main flow path.
A fluid control valve which is a resin case attached to the body and includes a case for internally accommodating an electric actuator for driving the valve body and a power transmission mechanism for transmitting the driving force of the electric actuator to the valve body. In
A plurality of fastening portions for fastening the body and the case are provided.
Each fastening part
The screw receiving portion provided on the body and
It is composed of a screw member that fastens the screw receiving portion and the corresponding portion by screwing the screw receiving portion through the corresponding portion of the case.
Each screw member is characterized by including a fitting portion that is exposed inside the case and is fitted with a tool that applies a rotational force to the screw member.

According to the first invention, in the attachment of the case to the body, a tool is fitted to the fitting portion of the screw member at each fastening portion, and each screw member is screwed from the inside of the case to the screw receiving portion of the body with the tool. It is done by combining. Therefore, it is not necessary to provide a fastening ear piece on the outside of the case for each screw member, so that the space around the case and the body can be saved accordingly.

Further, since the operating directions of the tools operated from the inside of the case toward the body can be easily aligned in the same direction for each screw member, it is possible to simplify the process of attaching the case to the body. Further, since the fastening is performed at each fastening portion by screwing the screw member into the screw receiving portion provided on the metal body, the fastening force can be strengthened.

The fluid control valve according to the second invention is the same as that in the first invention.
The valve body is a rotary valve body that is rotatably arranged in the main flow path and fixed to a valve shaft supported by the body.
The electric actuator is an electric motor having a substantially cylindrical outer shape and having a rotation axis parallel to the central axis of the substantially cylindrical shape.
The rotating shaft and the valve shaft are substantially parallel to each other.
The case accommodates the electric motor and has a cylindrical motor accommodating portion that protrudes from the fastening portion toward the body side in the length direction of the rotating shaft.
At least two of the fastening portions are motor-side fastening portions provided on one side and the other side of the first reference plane including both central axes of the rotating shaft and the valve shaft.
The rotation axis of the screw member of each motor-side fastening portion overlaps with the motor accommodating portion in a direction perpendicular to the first reference plane.

According to the second invention, since the motor-side fastening portion is located in the vicinity of the motor accommodating portion, the heavy electric motor can be firmly held by the body even though it is inserted through a part of the case.

The fluid control valve according to the third invention is the second invention.
At least one of the fastening portions is a valve shaft side fastening portion in which the distance from the valve shaft is smaller than the distance between the motor accommodating portion and the valve shaft.
The motor-side fastening portion and the valve shaft-side fastening portion are located on one and the other side of the second reference plane including the central axis of the valve shaft, which is perpendicular to the first reference plane.
The body has a flange portion around the main flow path provided with first, second and third flow path fastening holes into which a fastening member for connecting another flow path to the main flow path is inserted. A valve shaft support portion that supports a portion of the valve shaft opposite to the case across the main flow path is provided.
The first flow path fastening hole is between the motor side fastening portion and the valve shaft in a direction perpendicular to the second reference plane, and is perpendicular to the second reference plane and has a central axis of the main flow path. Located on the case side of the including third reference plane,
The second flow path fastening hole is located on the opposite side of the valve shaft side fastening portion from the valve shaft.
The third flow path fastening hole is located on the motor accommodating portion side of the second reference plane and on the valve shaft support portion side of the third reference plane.
The first, second, and third flow path fastening holes are characterized in that they are located at positions that are substantially divided into three equal parts in the circumferential direction around the main flow path.

According to the third invention, for cases having the same shape and size, a body having a different size of the main flow path and positions of the first to third flow path fastening holes can be used, and the positions of the fastening portions on the case side and the body side can be determined. By making them compatible, they can be combined without any trouble. That is, cases having the same shape and size can be diverted to bodies having different main flow paths.

The fluid control valve according to the fourth invention is the second or third invention.
The electric motor includes a motor flange that projects from the outer periphery of the substantially cylindrical shape inside the case in a direction perpendicular to the rotation axis of the electric motor.
The motor flange has a fastening hole in a portion corresponding to a screw receiving portion of the motor-side fastening portion for fastening the motor flange to the body together with the case from the inside of the case by a screw member of the motor-side fastening portion. It is characterized by having.

According to the fourth invention, since the circumference of the fastening hole of the motor flange can be utilized as a seating surface that receives the fastening force by the screw member, the surface pressure of the portion corresponding to the fastening portion on the motor side of the case is increased. The fastening force can be strengthened without any need.

In any one of the second to fourth inventions, the fluid control valve according to the fifth invention has at least one of the motor-side fastening portions in a direction from the substantially cylindrical central axis toward the valve shaft. It is characterized in that it is located on the valve shaft side with respect to the central axis.

According to the fifth invention, since the substantially cylindrical shape of the electric motor and the distance between the surface passing through both central axes of the valve shaft and the fastening portion on the motor side can be reduced, it is not necessary to increase the outer shape of the case. That is, it is possible to suppress the overhang of the case in the direction parallel to the central axis of the main flow path.

The fluid control valve according to the sixth invention is the fluid control valve according to the sixth invention in any one of the first to fifth inventions.
The screw receiving portion of each fastening portion has a screw receiving portion side seat surface that receives a fastening load when the body and the case are fastened by the fastening portion.
The case is opened to the outer peripheral surface substantially parallel to the fastening direction by the fastening portion, the case side seat surface corresponding to the screw receiving portion side seat surface of each fastening portion, and the case side seat surface through which the screw member passes. Has a through hole and
The case-side seating surface corresponding to at least one fastening portion is formed as a part of an extending surface extending from the through-hole side of the case-side seating surface to the outer peripheral surface side.
The area of the seating surface on the case side is characterized in that the area on the outer peripheral surface side is larger than the area on the opposite side than the central axis of the through hole.

According to the sixth invention, by extending the screw receiving portion side seating surface toward the outer peripheral surface side of the case as in the case side seating surface, it is not necessary to increase the outer shape of the case, and the screw receiving portion side seating surface and the corresponding The area of the seating surface on the case side can be increased. Thereby, the surface pressure on the resin of the case constituting the case side seating surface can be reduced by the screw receiving portion side seating surface and the case side seating surface having a larger area.

The fluid control valve according to the seventh invention is the same as that of the sixth invention.
The extending surface is formed as the bottom surface of a recess that is open to the outer peripheral surface side.
The screw receiving portion of the one fastening portion is characterized by having a fitting surface in which at least a part of the screw receiving portion is in contact with and fitted to the inner surface surface of the recess.

According to the seventh invention, by fitting the screw receiving portion and the corresponding recess, the case and the body can be positioned without any trouble on the inner surface of the recess and the fitting surface of the screw receiving portion.

FIG. 1A is a perspective view showing a main part of the fluid control valve according to the first embodiment of the present invention, and FIG. 1B is a view showing a state in which the fluid control valve is viewed from the case side. FIG. 2A is a diagram showing a state in which the fluid control valve of FIG. 1 is viewed from the upstream side along the central axis of the main flow path, and FIG. 2B is an explanatory diagram for explaining the effect of the first embodiment. .. It is a figure which shows the state which the fluid control valve which concerns on 2nd Embodiment of this invention is seen from the case side. 4A and 4B are perspective views of a body and a case according to a third embodiment of the present invention, respectively, and FIG. 4C is a perspective view showing a modified example of the case.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1A shows a main part of the fluid control valve according to the first embodiment of the present invention, and FIG. 1B shows a case attached to the body of the fluid control valve as viewed from the case side. This fluid control valve is used to control the intake amount of the internal combustion engine.

As shown in FIGS. 1A and 1B, the fluid control valve 1 has a body 3 provided with a main flow path 2 through which a fluid flows, and a fluid flowing in the main flow path 2 by adjusting the cross-sectional area of the flow path in the main flow path 2. A valve body 4 for adjusting the amount of intake air is provided. A resin case 5 is attached to the body 3. In FIG. 1B, the cover 6 of the case 5 and the like are not shown for the sake of clarity. The body 3 is made of metal, for example, aluminum.

The case 5 houses an electric motor 7 as an electric actuator for driving the valve body 4, a gear mechanism 8 as a power transmission mechanism for transmitting the driving force of the electric motor 7 to the valve body 4, and the like. The body 3 and the case 5 are fastened by a plurality of fastening portions 9. In the present embodiment, the fastening portions 9 are provided at three locations.

Each fastening portion 9 includes a screw receiving portion 10 provided on the body 3 and a screw member 11 for fastening the screw receiving portion 10 and the corresponding portion by screwing the screw receiving portion 10 through the corresponding portion of the case 5. Consists of. Each screw member 11 includes a fitting portion 12 that is exposed inside the case 5 and is fitted with a tool that applies a rotational force to the screw member 11. If necessary, a washer 13 is interposed between the screw member 11 and the resin of the case 5.

The valve body 4 is a rotary valve body that is rotatably arranged in the main flow path 2 and fixed to a valve shaft 14 supported by the body 3. The electric motor 7 has a substantially cylindrical outer shape, and the rotating shaft 15 is parallel to the central axis of the substantially cylindrical shape. The rotating shaft 15 and the valve shaft 14 are substantially parallel to each other. The case 5 accommodates the electric motor 7 and has a cylindrical motor accommodating portion 16 that protrudes toward the body 3 from the fastening portion 9 in the length direction of the rotating shaft 15.

The electric motor 7 has a motor flange 17 that projects radially outward from the opening 16a of the motor accommodating portion 16 to the inside of the case 5. The opening side of the electric motor 7 is fixed to the case 5 by screwing the motor flange 17 from the inside of the case 5 to the case 5 along the rotation axis direction of the electric motor 7.

Two of the fastening portions 9 are motor-side fastening portions 9a provided on one side and the other side of the first reference surface P1 including both central axes of the rotating shaft 15 and the valve shaft 14. The rotation axis of the screw member 11 of each motor-side fastening portion 9a overlaps with the motor accommodating portion 16 in a direction perpendicular to the first reference surface P1.

The other one of the fastening portions 9 is a valve shaft side fastening portion 9b in which the distance from the valve shaft 14 is smaller than the distance between the motor accommodating portion 16 and the valve shaft 14. The motor side fastening portion 9a and the valve shaft side fastening portion 9b are located on one and the other side of the second reference surface P2 perpendicular to the first reference surface P1 and including the central axis of the valve shaft 14.

The body 3 has first, second, and third flow path fastening holes 18a to 18c in which fastening members for connecting the intake flange, which is another flow path, are inserted around the main flow path 2. A flange portion 19 provided with the above is provided, and a valve shaft support portion 20 for supporting a portion opposite to the case 5 with the main flow path 2 of the valve shaft 14 interposed therebetween.

FIG. 2A shows a view of the fluid control valve 1 along the central axis of the main flow path 2. As shown in FIG. 2A, the first flow path fastening hole 18a is between the motor side fastening portion 9a and the valve shaft 14 in the direction perpendicular to the second reference surface P2, and is perpendicular to the second reference surface P2. It is located on the case 5 side of the third reference plane P3 including the central axis of the main flow path 2. The second flow path fastening hole 18b is located on the opposite side of the valve shaft side fastening portion 9b from the valve shaft 14.

The third flow path fastening hole 18c is located on the motor accommodating portion 16 side of the second reference surface P2 and on the valve shaft support portion 20 side of the third reference surface P3. The first, second, and third flow path fastening holes 18a to 18c are located around the main flow path 2 at positions that are substantially divided into three equal parts in the circumferential direction. The motor-side fastening portion 9a is located closer to the valve shaft 14 than the central axis in the direction from the substantially cylindrical central axis, which is the outer shape of the electric motor 7, toward the valve shaft 14.

In this configuration, when the case 5 is attached to the body 3, the corresponding portion of the case 5 is positioned with respect to the screw receiving portion 10 of each fastening portion 9, and the screw member 11 is required from the inside of the case 5. The washer 13 is interposed and inserted according to the above. Then, a tool is fitted into the fitting portion 12 of the screw member 11, the screw member 11 is screwed into the screw receiving portion 10 with the tool, and the screw receiving portion 10 and the corresponding portion of the case 5 are fastened.

In this way, after the case 5 is attached to the body 3, necessary parts such as the gear mechanism 8 are arranged inside the case 5, and the cover 6 is attached to the case 5.

According to the present embodiment, the case 5 is attached to the body 3 by inserting the screw member 11 from the inside of the case 5 and screwing it into the screw receiving portion 10 of the body 3, so that the outside of the case 5 is attached. It is not necessary to provide an ear piece or the like for fastening the screw member 11 through the screw member 11. Therefore, it is possible to save space around the case 5 and the body 3.

Further, the operating directions of the tools operated from the inside of the case 5 toward the body 3 can be easily aligned in the same direction for each screw member 11. Therefore, the case 5 can be easily attached to the body 3. Further, since the fastening is performed by screwing the screw member 11 into the screw receiving portion 10 provided on the metal body 3, the fastening can be performed with a strong fastening force.

Further, since the motor-side fastening portion 9a is located on the valve shaft 14 side of the substantially cylindrical central axis that is the outer shape of the electric motor 7, the first reference surface that passes through the central axis and the central axis of the valve shaft 14. The distance between P1 and each motor-side fastening portion 9a can be reduced. As a result, the dimensions of the case 5 in the direction parallel to the central axis of the main flow path 2 can be adjusted as compared with the case where the motor-side fastening portion 9a is located at the same position as the central axis in the direction from the central axis to the valve shaft 14. It can be suppressed.

Further, since the rotation axis of the screw member 11 of each motor side fastening portion 9a overlaps with the motor accommodating portion 16 in the direction perpendicular to the first reference surface P1, the motor side fastening portion 9a is located near the motor accommodating portion 16. do. Therefore, the heavy electric motor 7 can be firmly held by the body 3 while passing through a part of the case 5.

FIG. 2B is an explanatory diagram for explaining the further effect of the present embodiment. In the present embodiment, the first to third flow path fastening holes 18a to 18c of the body 3 are arranged so as to have a positional relationship with the case 5 and the like as described above.

As shown in FIG. 2B, as compared with the case where the first to third flow path fastening holes 18a to 18c are arranged around the small size main flow path 2b, the first to first flow paths 1 to 1 are arranged around the large size main flow path 2c. When the three flow path fastening holes 18a to 18c are arranged, the second flow path fastening hole 18b is further separated from the valve shaft side coupling portion 9b, and the third flow path fastening hole 18c is further separated from the valve shaft support portion 20. The positions where the first to third flow path fastening holes 18a to 18c are divided into three equal parts in the circumferential direction around the main flow paths 2b and 2c with reference to the first flow path fastening hole 18a without interfering with each other. Can be placed in.
Therefore, a body having main flow paths 2b and 2c having different sizes and different positions of the first to third flow path fastening holes 18a to 18c is provided on the case 5 side and the body side with respect to the case 5 having the same shape and size. By simply matching the position of each fastening portion 9 and the position of the valve shaft 14 indicated by the axis AX, the coupling can be performed in the same manner via each fastening portion 9. That is, the case 5 having the same shape and size can be diverted to each body having the main flow paths 2a and 2b having different sizes.

FIG. 3 shows a state in which the case attached to the body of the fluid control valve according to the second embodiment of the present invention is viewed from the case side. As shown in FIG. 3, the electric motor 7 of the fluid control valve 1b projects inside the case 5 from a substantially cylindrical outer circumference, which is the outer shape of the electric motor 7, in a direction perpendicular to the rotation shaft 15 of the electric motor 7. A motor flange 17b is provided.

The motor flange 17b is used to fasten the motor flange 17b to the body 3 together with the case 5 from the inside of the case 5 by the screw member 11 of the motor side fastening portion 9a to the portion corresponding to the screw receiving portion 10 of the motor side fastening portion 9a. It has a fastening hole 21.

Therefore, in the case of the present embodiment, when the case 5 is attached to the body 3, the motor flange 17b is inserted through the fastening hole 21 by the screw member 11 with the electric motor 7 inserted in the motor accommodating portion 16 of the case 5. It is fastened to the body 3 together with the case 5.

According to this, the periphery of the fastening hole 21 of the motor flange 17b can be utilized as a seating surface that receives the fastening force of the screw member 11. With this configuration, the fastening force at the motor-side fastening portion 9a can be strengthened without increasing the surface pressure on the resin of the portion of the case 5 corresponding to the motor-side fastening portion 9a. For example, the washer 13 in the first embodiment can be used. It can be omitted. Other configurations are the same as in the case of the first embodiment.

4A and 4B are perspective views of the body 3b and the case 5b according to the third embodiment of the present invention, respectively. As shown in these figures, the screw receiving portion 10b of each fastening portion 29 has a screw receiving portion side seat surface 22 that receives a fastening load when the body 3b and the case 5b are fastened by the fastening portion 29.

The case 5b opens to the outer peripheral surface 23 substantially parallel to the fastening direction by the fastening portion 29, the case side seat surface 24 corresponding to the screw receiving portion side seat surface 22 of each fastening portion, and the case side seat surface 24, and is a screw member. It has a through hole 25 through which 11 passes.

The case-side seating surface 24 corresponding to each fastening portion 29 is formed as a part of the extending surface 26 extending from the through hole 25 side of the case-side seating surface 24 to the outer peripheral surface 23 side. The area of the case side seat surface 24 on the outer peripheral surface 23 side is larger than the area on the opposite side than the central axis of the through hole 25.

The extending surface 26 is formed as the bottom surface of the recess 27 that is open to the outer peripheral surface 23 side. The screw receiving portion 10b of each fastening portion 29 has a fitting surface 28 that at least a part of the screw receiving portion 10b abuts on the inner surface of the recess 27 to be fitted.

When the case 5b is attached to the body 3b, the corresponding screw receiving portion 10b is fitted into the recess 27 of each case side seating surface 24, and the case side seating surface 24 and the screw receiving portion side seating surface 22 are formed. To abut. Then, the screw member 11 is screwed into the screw receiving portion 10b from the inside of the case 5b through the through hole 25 of the case side seat surface 24. As a result, the screw receiving portion 10b and the corresponding portion of the case 5b are fastened at each fastening portion 29, and the case 5b can be attached to the body 3b.

According to this, similarly to the case side seating surface 24, by extending the screw receiving portion side seating surface 22 toward the outer peripheral surface 23 side of the case 5b, it is not necessary to increase the outer shape of the case 5b, and the screw receiving portion side seating surface does not need to be enlarged. The area of 22 and the case side seat surface 24 can be increased. As a result, the screw receiving portion side seating surface 22 and the case side seating surface 24 having a larger area reduce the surface pressure on the resin constituting the case side seating surface 24 and prevent damage to the case side seating surface 24. Can be done.

Further, by simply fitting the screw receiving portion 10b of the body 3b into the recess 27 of the case 5b, the case 5b and the body 3b can be positioned without any trouble on the inner surface of the recess 27 and the fitting surface 28 of the screw receiving portion. be able to.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, in the third embodiment, as shown in FIG. 4C, the extending surface extending from the through hole 25 side to the outer peripheral surface 23 side is not formed as the bottom surface of the recess 27 as described above, but has a peripheral surface. It may be a completely open extension surface 26b.

In this case, the area of the extending surface 26b and the area of the case side seating surface 24b may be increased by the amount by removing the recess 27. Further, by forming a part of the side surface of the screw receiving portion of the motor side fastening portion along the side surface of the motor accommodating portion 16, the screw receiving portion side seat surface can be attached to the case side seat surface 24b as a guide. You may use it.

1, 1b ... Fluid control valve, 2 ... Main flow path, 3 ... Body, 4 ... Valve body, 5, 5b ... Case, 6 ... Cover, 7, 7b ... Electric motor, 8 ... Gear mechanism, 9, 29 ... Fastening part , 9a ... Motor side fastening part, 9b ... Valve shaft side fastening part, 10, 10b ... Screw receiving part, 11 ... Screw member, 12 ... Fitting part, 13 ... Washer, 14 ... Valve shaft, 15 ... Rotating shaft, 16 ... Motor accommodating portion, 16a ... Opening, 17, 17b ... Motor flange, 18a ... First flow path fastening hole, 18b ... Second flow path fastening hole, 18c ... Third flow path fastening hole, 19 ... Flange portion, 20 ... Valve shaft support portion, 21 ... Fastening hole, 22 ... Screw receiving portion side seat surface, 23 ... Outer peripheral surface, 24, 24b ... Case side seat surface, 25 ... Through hole, 26, 26b ... Extended surface, 27 ... Recessed surface , 28 ... Fitting surface, P1 ... First reference surface, P2 ... Second reference surface, P3 ... Third reference surface.

Claims (7)

A metal body with a main flow path for fluid flow and
A valve body that adjusts the cross-sectional area of the flow path in the main flow path to adjust the amount of fluid flowing in the main flow path.
A fluid control valve which is a resin case attached to the body and includes a case for internally accommodating an electric actuator for driving the valve body and a power transmission mechanism for transmitting the driving force of the electric actuator to the valve body. In
A plurality of fastening portions for fastening the body and the case are provided.
Each fastening part
The screw receiving portion provided on the body and
It is composed of a screw member that fastens the screw receiving portion and the corresponding portion by screwing the screw receiving portion through the corresponding portion of the case.
Each threaded member is a fluid control valve that is exposed inside the case and includes a fitting portion that is fitted with a tool that applies a rotational force to the threaded member. The valve body is a rotary valve body that is rotatably arranged in the main flow path and fixed to a valve shaft supported by the body.
The electric actuator is an electric motor having a substantially cylindrical outer shape and having a rotation axis parallel to the central axis of the substantially cylindrical shape.
The rotating shaft and the valve shaft are substantially parallel to each other.
The case accommodates the electric motor and has a cylindrical motor accommodating portion that protrudes from the fastening portion toward the body side in the length direction of the rotating shaft.
At least two of the fastening portions are motor-side fastening portions provided on one side and the other side of the first reference plane including both central axes of the rotating shaft and the valve shaft.
The fluid control valve according to claim 1, wherein the rotation axis of the screw member of each motor-side fastening portion overlaps with the motor accommodating portion in a direction perpendicular to the first reference plane. At least one of the fastening portions is a valve shaft side fastening portion in which the distance from the valve shaft is smaller than the distance between the motor accommodating portion and the valve shaft.
The motor-side fastening portion and the valve shaft-side fastening portion are located on one and the other side of the second reference plane including the central axis of the valve shaft, which is perpendicular to the first reference plane.
The body has a flange portion around the main flow path provided with first, second and third flow path fastening holes into which a fastening member for connecting another flow path to the main flow path is inserted. A valve shaft support portion that supports a portion of the valve shaft opposite to the case across the main flow path is provided.
The first flow path fastening hole is between the motor side fastening portion and the valve shaft in a direction perpendicular to the second reference plane, and is perpendicular to the second reference plane and has a central axis of the main flow path. Located on the case side of the including third reference plane,
The second flow path fastening hole is located on the opposite side of the valve shaft side fastening portion from the valve shaft.
The third flow path fastening hole is located on the motor accommodating portion side of the second reference plane and on the valve shaft support portion side of the third reference plane.
The fluid control valve according to claim 2, wherein the first, second, and third flow path fastening holes are located around the main flow path at positions that are substantially divided into three equal parts in the circumferential direction. The electric motor includes a motor flange that projects from the outer periphery of the substantially cylindrical shape inside the case in a direction perpendicular to the rotation axis of the electric motor.
The motor flange has a fastening hole in a portion corresponding to a screw receiving portion of the motor-side fastening portion for fastening the motor flange to the body together with the case from the inside of the case by a screw member of the motor-side fastening portion. The fluid control valve according to claim 2 or 3, wherein the fluid control valve has. Claims 2 to 2, wherein at least one of the motor-side fastening portions is located closer to the valve shaft side than the central axis in the direction from the substantially cylindrical central axis to the valve shaft. 4. The fluid control valve according to any one of 4. The screw receiving portion of each fastening portion has a screw receiving portion side seat surface that receives a fastening load when the body and the case are fastened by the fastening portion.
The case is opened to the outer peripheral surface substantially parallel to the fastening direction by the fastening portion, the case side seat surface corresponding to the screw receiving portion side seat surface of each fastening portion, and the case side seat surface through which the screw member passes. Has a through hole and
The case-side seating surface corresponding to at least one fastening portion is formed as a part of an extending surface extending from the through-hole side of the case-side seating surface to the outer peripheral surface side.
The area of the case-side seating surface according to any one of claims 1 to 5, wherein the area on the outer peripheral surface side is larger than the area on the opposite side than the central axis of the through hole. Fluid control valve. The extending surface is formed as the bottom surface of a recess that is open to the outer peripheral surface side.
The fluid control valve according to claim 6, wherein the screw receiving portion of the one fastening portion has a fitting surface in which at least a part thereof abuts and fits on the inner surface surface of the recess.

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