WO2021039225A1 - Valve device and method for manufacturing valve device - Google Patents

Abstract

A speed reduction mechanism (50) includes a plurality of gears (52-55) that transmit torque of a motor (60). A shaft (30) rotates about the axis in response to the torque transmitted from the speed reduction mechanism (50). A valve body (40) is integrally formed with the shaft (30) by insert molding and rotates together with the shaft (30). A housing (10) has housed therein a fluid passage (11) so as to allow the valve body (40) to be rotatable and has, in a part of the fluid passage (11), a valve seat (20) that allows the valve body (40) to sit thereon and separate therefrom. The shaft (30) includes a positioning part (32, 321-326) enabling positioning in the rotation direction. Furthermore, the shaft (30) and the valve gear (52) that fits in an end portion (31) of the shaft (30) are configured to fit in a state of being rotatable relative to each other during assembling, and the valve gear (52) and the shaft (30) are fixed so as not to relatively rotate during driving.

Description

Valve device, manufacturing method of valve device Cross-reference to related applications

This application is based on Japanese Patent Application No. 2019-158567 filed on August 30, 2019, the contents of which are incorporated herein by reference.

This disclosure relates to a valve device and a method for manufacturing the valve device.

Conventionally, a valve device for controlling the flow of fluid in a fluid passage is known.
The valve device described in Patent Document 1 has a configuration in which a valve body is rotatably provided in a fluid passage formed inside a housing and is driven by a drive unit. The valve body is integrally formed with the shaft. At one end of the shaft, a protrusion having a shape having two planes facing each other across the shaft shaft is provided. Hereinafter, the protrusion having that shape is referred to as a "width across flats shape portion". Of the plurality of gears constituting the reduction mechanism of the drive unit, the fitting holes of the valve gears are fitted and fixed to the two-sided width shape portion provided on the shaft so as not to rotate relative to each other during driving. In the valve device, when the torque of the motor is transmitted to the shaft via the reduction mechanism, the valve body is rotationally driven together with the shaft, and the valve body is seated on the valve seat provided in a part of the fluid passage formed in the housing. It is configured to leave.
In this valve device, when the valve body and the shaft are integrally formed by insert molding in the manufacturing process, the two-sided width shape portion provided at one end of the shaft is used to position the shaft in the rotational direction with respect to the valve body. It is possible to do.

JP-A-2018-96490

By the way, when the valve device is mounted on a vehicle, for example, the direction of the fluid passage formed in the housing and the position of the valve seat may be changed according to the vehicle type and the like. On the other hand, in the valve device described in Patent Document 1 described above, the fitting hole provided in the valve gear is fitted and fixed to the two-sided width shape portion provided at one end of the shaft so as not to rotate relative to each other. .. Therefore, in this valve device, the orientation of the valve body with respect to the shaft and the orientation of the valve gear are uniquely determined, and the configuration has no degree of freedom. Therefore, in the configuration of the valve device described in Patent Document 1, the fitting hole is provided so that the angle at which the shaft and the valve gear are fitted differs depending on the direction of the fluid passage formed in the housing and the position of the valve seat. It is necessary to increase the types of valve gears that have been turned around. Alternatively, it is necessary to increase the types of shafts in which the orientation of the width across flats is changed.

The present disclosure discloses a valve device and a valve device capable of positioning the shaft in the rotational direction when integrally molding the shaft and the valve body, and suppressing an increase in the types of valve gears and shafts. The purpose is to provide a method.

According to one aspect of the present disclosure, the valve device comprises a motor, a reduction mechanism, a shaft, a valve body and a housing. The motor outputs torque. The reduction mechanism has a plurality of gears that transmit the torque of the motor. Torque is transmitted from the reduction mechanism to rotate the shaft around the shaft. The valve body is integrally formed with the shaft by insert molding and rotates together with the shaft. The housing has a fluid passage in which the valve body is rotatably accommodated, and a valve seat in which the valve body is seated and detached in a part of the fluid passage. Then, the shaft has a positioning portion capable of positioning in the rotational direction. Of the multiple gears of the reduction gear, the valve gear and shaft that fit to the end of the shaft are fitted in a state where they can rotate relative to each other when assembled, and the valve gear and shaft do not rotate relative to each other when driven. It is fixed as.

According to this, since the shaft has a positioning portion, when the valve body and the shaft are integrally formed by insert molding, it is possible to position the valve body in the rotational direction of the shaft. Therefore, it is possible to reduce variations in the quality of the valve subassembly in which the valve body and the shaft are integrated.

Further, since the shaft and the valve gear are fitted in a state of being relatively rotatable at the time of assembly, the rotation angles of the shaft and the valve gear are adjusted and fixed according to the position of the valve seat of the housing. It is possible. Therefore, it is possible to suppress an increase in the types of valve gears and shafts and reduce manufacturing costs.

By the way, when the valve subassembly is installed in the fluid passage of the housing as in the conventional case, the rotation angle between the valve seat and the valve subassembly of the housing varies due to manufacturing tolerances. Therefore, conventionally, an adjusting device and an adjusting process for adjusting the variation due to the manufacturing tolerance have been required.

On the other hand, the valve device according to one aspect of the present disclosure described above can adjust the rotation angle between the valve subassembly and the valve gear and fix them in a state where the valve subassembly is arranged in the fluid passage of the housing. Is. As a result, the adjustment device for adjusting the variation due to the manufacturing tolerance and the adjustment process thereof, which have been conventionally required, can be eliminated, and the manufacturing cost can be reduced.

Another aspect of the present disclosure relates to a method of manufacturing a valve device. The valve device includes a motor, a reduction mechanism, a shaft, a valve body and a housing. The motor outputs torque. The reduction mechanism has a plurality of gears that transmit the torque of the motor. Torque is transmitted from the reduction mechanism to rotate the shaft around the shaft. The valve body is integrally formed with the shaft by insert molding and rotates together with the shaft. The housing has a fluid passage in which the valve body is rotatably accommodated, and a valve seat in which the valve body is seated and detached in a part of the fluid passage.
The method of manufacturing this valve device is to position the shaft in the rotational direction by a positioning portion provided on the shaft, integrally form the shaft and the valve body by insert molding, and a plurality of gears having a reduction mechanism. Of these, the valve gear that fits at the end of the shaft and the shaft are fitted in a relatively rotatable state, the valve gear and the shaft are aligned, and the valve gear and the shaft are fixed by welding or crimping. Includes doing.

According to this, the valve device manufactured by the method for manufacturing the valve device has the same effect as described from one viewpoint of the present disclosure.

Note that the reference reference numerals in parentheses attached to each component or the like indicate an example of the correspondence between the component or the like and the specific component or the like described in the embodiment described later.

It is a block diagram of the engine system which uses the valve device which concerns on 1st Embodiment. It is an external view of the valve device which concerns on 1st Embodiment. It is a top view which removed a part of the sensor cover in the direction III of FIG. It is sectional drawing of the IV-IV line of FIG. It is sectional drawing of the VV line of FIG. It is a perspective view of the valve subassembly which concerns on 1st Embodiment. It is a top view of the valve subassembly which concerns on 1st Embodiment. It is an enlarged view of the VIII part of FIG. It is sectional drawing of a part of a shaft and a valve gear. It is a top view of the valve gear which concerns on 1st Embodiment. It is a flowchart for demonstrating a part of the manufacturing process of the valve apparatus which concerns on 1st Embodiment. It is a schematic diagram of the mold which forms the valve subassembly which concerns on 1st Embodiment. It is an arrow view of FIG. 12 in the XIII direction. It is a side view which shows a part of the valve subassembly which concerns on 2nd Embodiment. FIG. 14 is a plan view of the valve subassembly in the XV direction of FIG. It is a top view of the valve gear which concerns on 2nd Embodiment. It is explanatory drawing for demonstrating the process of crimping a valve gear and a shaft which concerns on 2nd Embodiment. It is explanatory drawing for demonstrating the process of crimping a valve gear and a shaft which concerns on 2nd Embodiment. It is sectional drawing of a part of a shaft and a valve gear in the XIX-XIX line of FIG. It is explanatory drawing for demonstrating the process of crimping a valve gear and a shaft which concerns on 2nd Embodiment. It is sectional drawing of a part of a shaft and a valve gear in the XXI-XXI line of FIG. It is a side view which shows a part of the valve subassembly which concerns on 3rd Embodiment. It is sectional drawing of a part of a valve subassembly which concerns on 3rd Embodiment, a bearing and a seal member. It is a side view which shows a part of the valve subassembly which concerns on 4th Embodiment. It is an arrow view of FIG. 24 in the XXV direction. It is a perspective view which shows a part of the valve subassembly which concerns on 4th Embodiment. It is a perspective view which shows a part of the valve subassembly of the modification of 4th Embodiment. It is a side view which shows a part of the valve subassembly which concerns on 5th Embodiment. FIG. 28 is an arrow view in the XXIX direction of FIG. 28. It is a side view which shows a part of the valve subassembly which concerns on 6th Embodiment. FIG. 30 is an arrow view in the XXXI direction of FIG. It is a side view which shows a part of the valve subassembly which concerns on 7th Embodiment. FIG. 32 is an arrow view in the XXXIII direction of FIG. It is a schematic diagram of the mold which forms the valve subassembly which concerns on 7th Embodiment. FIG. 34 is an arrow view in the XXXV direction of FIG. 34. It is a perspective view of the valve subassembly provided in the valve device of the comparative example. It is a top view of the valve gear provided in the valve device of the comparative example. It is a top view of the valve device of the comparative example excluding a part of the sensor cover. It is an enlarged view of the XXXIX part of FIG. 38.

Hereinafter, a plurality of embodiments of the present disclosure will be described with reference to the drawings. In each of the following embodiments, the same or equal parts are designated by the same reference numerals, and the description thereof will be omitted.

(First Embodiment)
The first embodiment will be described with reference to the drawings.
As shown in FIG. 1, the valve device 1 according to the first embodiment is used, for example, as an EGR valve of an engine system 100 for a vehicle. EGR is an abbreviation for Exhaust Gas Recirculation.

First, the engine system 100 in which the valve device 1 is used will be described. The engine system 100 includes an engine 110, an intake system 120, an exhaust system 130, a supercharger 140, an exhaust return system 150, and the like.
The engine 110 is a well-known prime mover that burns fuel in the combustion chamber 112 in the cylinder 111, converts the reciprocating motion of the piston 113 due to the volume change of the combustion gas into rotary motion by the crank mechanism, and obtains power for vehicle running or the like. is there.

The intake system 120 takes in air from the outside air into the intake pipe 122 via the air cleaner 121, passes through the compressor 141 of the supercharger 140, the intercooler 123, the throttle 124, the intake manifold 125, and the like, and passes through the combustion chamber 112 of the engine 110. It is configured to supply to. The air cleaner 121 removes foreign matter from the air taken in from the atmosphere. An intake passage 126 is formed inside the intake pipe 122. The intercooler 123 cools the intake air compressed by the compressor 141 and raised in temperature. The throttle 124 adjusts the intake amount of the engine 110. The intake manifold 125 has a structure in which the passages are branched into the same number as the cylinders 111 of the engine 110.

On the other hand, the exhaust system 130 is configured to discharge the exhaust gas discharged from the engine 110 to the outside air via the exhaust manifold 131, the exhaust pipe 132, the turbine 142 of the supercharger 140, the exhaust purification unit 133, and the like. There is. The exhaust manifold 131 has a structure in which the same number of passages as the cylinder 111 are merged. An exhaust passage 134 is formed inside the exhaust pipe 132. The exhaust gas purification unit 133 captures particulate matter contained in the exhaust gas, decomposes hydrocarbons, and the like.

The supercharger 140 uses the energy of the exhaust gas to compress the intake air and supercharges the pressurized air to the combustion chamber 112. The turbocharger 140 has a compressor 141, a turbine 142, and a shaft 143. The turbine 142 is arranged between the engine 110 and the exhaust purification unit 133 in the exhaust system 130, and is rotationally driven by the energy of the exhaust. The shaft 143 connects the turbine 142 and the compressor 141, and rotates the turbine 142 and the compressor 141 in synchronization with each other. The compressor 141 is arranged between the air cleaner 121 and the intercooler 123 in the intake system 120 to compress the intake air.

The exhaust gas recirculation system 150 is a device that returns a part of the exhaust gas flowing through the exhaust passage 134 to the intake passage 126, and includes an EGR pipe 151, an EGR cooler 152, a valve device 1, and the like. The EGR pipe 151 connects a portion of the exhaust pipe 132 downstream of the exhaust purification unit 133 to the valve device 1. An EGR passage 153 is formed inside the EGR tube 151. In the following description, the exhaust gas flowing through the EGR pipe 151 is referred to as EGR gas. The EGR cooler 152 is provided in the middle of the EGR pipe 151 and cools the EGR gas passing through the EGR passage 153. The valve device 1 is provided at a portion of the intake pipe 122 between the air cleaner 121 and the compressor 141, and constitutes a connection portion between the intake pipe 122 and the EGR pipe 151. The valve device 1 increases or decreases the flow rate of the EGR gas returned to the intake passage 126 through the EGR passage 153.

Next, the configuration of the valve device 1 will be described.
As shown in FIGS. 2 to 5, the valve device 1 includes a housing 10, a shaft 30, a valve body 40, a reduction mechanism 50, a motor 60, and the like.
The housing 10 has a fluid passage 11 through which intake air and EGR gas flow. An upstream side connection port 12, a downstream side connection port 13, and an EGR connection port 14 are provided at the end of the fluid passage 11. As shown in FIG. 1, a pipe extending from the air cleaner 121 side of the intake pipe 122 is connected to the upstream side connection port 12. A pipe extending to the compressor 141 side of the intake pipe 122 is connected to the downstream connection port 13. The EGR tube 151 is connected to the EGR connection port 14. Therefore, the housing 10 forms a confluence of the intake pipe 122 and the EGR pipe 151.

As shown in FIG. 5, a valve chamber 15 for rotatably accommodating the valve body 40 is formed inside the housing 10. The flow path connecting the upstream side connection port 12 and the valve chamber 15 is referred to as an upstream side passage 16. The flow path connecting the downstream connection port 13 and the valve chamber 15 is referred to as a downstream passage 17. The flow path communicating the EGR connection port 14 and the valve chamber 15 is referred to as an EGR passage 18. The valve chamber 15, the upstream passage 16, the downstream passage 17, and the EGR passage 18 are all part of the fluid passage 11.

A tubular valve seat member 19 is provided inside the EGR passage 18. A valve seat 20 on which the valve body 40 sits and leaves is provided in the opening of the valve seat member 19 on the valve chamber 15 side. Note that FIGS. 4 and 5 show a state in which the valve body 40 is seated on the valve seat 20 and blocks the EGR passage 18. In this state, the valve body 40 blocks the flow of EGR gas from the EGR pipe 151 to the intake pipe 122 and allows the flow of the intake air of the intake pipe 122.

As shown in FIG. 4, the shaft 30 is rotatably supported around the housing 10 by a bearing 21. The seal member 22 is provided at a position on the shaft 30 on the valve chamber 15 side of the bearing 21. The seal member 22 is fixed to the housing 10 and slides on the outer periphery of the shaft 30 to seal between the drive chamber 51 provided with the speed reduction mechanism 50 and the fluid passage 11.

As shown in FIGS. 4 to 7, the valve body 40 has a fan-shaped arm 41 to which the shaft 30 is fixed and a plate of the arm 41 that is curved in the axial direction from the outer edge on the side opposite to the shaft 30. It has a valve body portion 42 extending in a shape. The valve body 42 has a substantially arcuate cross section perpendicular to the axis of the shaft 30. The valve body 40 is configured such that the outer wall surface of the valve body 42 can be seated on and off the valve seat 20.

As shown in FIGS. 6 and 7, the shaft 30 and the valve body 40 are integrally formed by insert molding. Therefore, in the valve chamber 15, the shaft 30 and the valve body 40 are integrally rotationally driven. The shaft 30 is made of metal, for example, and the valve body 40 is made of resin, for example. In the following description, the one in which the shaft 30 and the valve body 40 are integrally formed is referred to as a valve subassembly 43.

In the first embodiment, the end portion 31 of the shaft 30 is provided with a positioning portion 32 having a shape in which a part in the circumferential direction is recessed inward in the radial direction with respect to the circle. Specifically, the positioning portion 32 has a so-called D-cut shape in which a part of the end portion 31 of the shaft 30 in the circumferential direction is cut out in a straight line. The positioning unit 32 is used for positioning the shaft 30 in the rotational direction when manufacturing the valve subassembly 43. This manufacturing method will be described later.

The shaft 30 has a plate 33 having a shape extending radially outward from the center of the shaft 30 at a portion to be inserted into the valve body 40. The plate 33 is fixed to a portion of the shaft 30 to be inserted into the valve body 40 so as not to rotate relative to the portion, and is molded into the valve body 40. The plate 33 is a member for increasing the coupling strength between the shaft 30 and the valve body 40. The plate 33 is made of, for example, metal.

As shown in FIG. 4, the drive chamber 51 provided on one side of the shaft 30 in the axial direction is provided with a reduction mechanism 50 composed of a plurality of gears and the like. The speed reduction mechanism 50 reduces the rotational speed of the motor 60, amplifies the torque of the motor 60, and transmits the torque to the shaft 30. Specifically, the reduction mechanism 50 includes a pinion gear 53 provided on the output shaft of the motor 60, an intermediate gear 54 that meshes with the pinion gear 53, a small diameter gear 55 provided coaxially with the intermediate gear 54, and the small diameter gear thereof. It is composed of a valve gear 52 that meshes with 55. The valve gear 52 is fixed to the end 31 of the shaft 30 so as not to rotate relative to each other. Further, the valve gear 52 is urged by the return spring 56 in the direction in which the valve body 40 is seated on the valve seat 20 (that is, one side indicated by the arrow in FIG. 5).

As shown in FIG. 6, the portion of the shaft 30 between the end portion 31 where the valve gear 52 is fitted and the portion inserted into the valve body 40 is referred to as a shaft intermediate portion 34. The outer diameter of the end portion 31 of the shaft 30 is formed to be smaller than the outer diameter of the shaft intermediate portion 34. Therefore, a step portion 35 is provided between the end portion 31 of the shaft 30 and the shaft intermediate portion 34. When the valve gear 52 is fitted to the end 31 of the shaft 30, the surface of the valve gear 52 on the valve body 40 side comes into contact with the stepped portion 35 of the shaft 30.

As shown in FIGS. 8 and 9, the valve gear 52 is fitted to the end 31 of the shaft 30 and fixed to the end 31 of the shaft 30.
FIG. 10 is a plan view showing only the valve gear 52. The valve gear 52 has a fitting hole 57 that fits into the end 31 of the shaft 30. In the first embodiment, the fitting hole 57 of the valve gear 52 is circular. Therefore, at the time of assembly, the end portion 31 of the shaft 30 and the valve gear 52 are fitted in a relatively rotatable state. In that state, it is possible to position the shaft 30 and the valve gear 52 in the rotational direction. After that, in the first embodiment, as shown in FIGS. 8 and 9, the end portion 31 of the shaft 30 and the valve gear 52 are fixed by welding. In FIGS. 8 and 9, the welded portion between the end portion 31 of the shaft 30 and the valve gear 52 is indicated by an arrow of reference numeral W.

The motor 60 is housed in the housing 10. The motor 60 is an electric motor that outputs torque when energized. When the motor 60 is driven, the torque of the motor 60 is transmitted to the shaft 30 via the reduction mechanism 50. When the shaft 30 rotates around the axis, the valve body 40 integrally formed with the shaft 30 rotates in the valve chamber 15. As a result, the valve body 40 increases or decreases the opening area of the EGR passage 18 and the opening area of the upstream passage 16.

As described above, FIGS. 4 and 5 show a state in which the valve body 40 is seated on the valve seat 20 and blocks the EGR passage 18. When the valve body 40 moves to the other side indicated by the arrow in FIG. 5 from this state, the opening area of the upstream passage 16 becomes smaller and the opening area of the EGR passage 18 becomes larger. As a result, the negative pressure of the downstream passage 17 on the downstream side of the valve body 40 becomes large, and the EGR gas is introduced from the EGR passage 18 to the downstream passage 17. As described above, the valve device 1 is provided in the intake pipe 122 on the upstream side of the compressor 141. Therefore, when the valve device 1 introduces the EGR gas from the EGR passage 18 into the intake passage 126 on the engine 110 side of the intake pipe 122, the valve device 1 not only increases the opening area of the EGR passage 18 but also opens the upstream passage 16. Reduce the area. As a result, the valve device 1 effectively utilizes the negative pressure generated by the operation of the piston 113 of the engine 110, and efficiently introduces the EGR gas from the EGR passage 18 into the intake passage 126 on the engine 110 side of the intake pipe 122. Is possible.

As shown in FIG. 4, a sensor cover 61 is provided in the drive chamber 51 of the housing 10. Inside the sensor cover 61, a sensor device 62 for detecting the rotation angle of the shaft 30 is provided. The sensor device 62 is composed of, for example, a pair of magnets 63 and a yoke 64 provided on the valve gear 52, a hole IC 65 attached to the sensor cover 61 side, and the like. The rotation angle of the shaft 30 detected by the sensor device 62 is transmitted to an electronic control device (not shown). The electronic control device feedback-controls the amount of electricity supplied to the motor 60 so that the rotation angle of the shaft 30 detected by the sensor device 62 and the target value thereof match.

Subsequently, among the manufacturing methods of the valve device 1 of the first embodiment, injection molding of the valve subassembly 43 and assembly of the valve gear 52 will be described with reference to the flowchart of FIG.

First, in step S10 shown in FIG. 11, the plate 33 is fixed to the portion of the shaft 30 on the side to be inserted into the valve body 40. At that time, the shaft 30 and the plate 33 are fitted and fixed so as not to rotate relative to each other.

Next, in step S20, the shaft 30 and the plate 33 are installed in a mold for injection molding. At this time, as shown in FIG. 13, the positioning portion 32 of the shaft 30 and the inner wall surface 74 of the lower mold 72 are brought into contact with each other. As a result, the shaft 30 is positioned in the rotational direction. That is, the rotation of the shaft 30 is restricted at the position where the positioning portion 32 and the inner wall surface 74 of the lower mold 72 are in contact with each other.

Subsequently, in step S30, the heat-melted resin is injected into the inside of the mold, and the resin is cooled and solidified. As a result, the shaft 30 and the valve body 40 are integrally formed by insert molding. Note that FIGS. 12 and 13 show an example of the mold opening process among the injection molding processes. As shown by the arrow MO in FIG. 12, in the mold opening step, the upper mold 71 moves away from the lower mold 72. Then, in the take-out step, the valve subassembly 43 is taken out from the lower mold 72 in the same direction.

Next, in step S40 shown in FIG. 11, the valve gear 52 is fitted to the end 31 of the shaft 30. The fitting of the end 31 of the shaft 30 and the valve gear 52 is performed in a state where the valve subassembly 43 is arranged in the valve chamber 15 of the housing 10. Specifically, the fitting hole 57 of the valve gear 52 is fitted to the end 31 of the shaft 30 protruding from the valve chamber 15 side of the housing 10 to the drive chamber 51 side. Here, as shown in FIG. 10, in the first embodiment, the fitting hole 57 of the valve gear 52 is circular. On the other hand, the positioning portion 32 provided at the end portion 31 of the shaft 30 has a so-called D-cut shape. Therefore, the end 31 of the shaft 30 and the valve gear 52 are fitted in a relatively rotatable state.

Subsequently, in step S50, the valve gear 52 and the shaft 30 are aligned. As a result, the positions of the valve gear 52 and the shaft 30 are determined according to the orientation of the fluid passage 11 formed in the housing 10 and the position of the valve seat 20. At that time, it is preferable to align the valve gear 52 and the shaft 30 with the valve body 40 seated on the valve seat 20.

Next, in step S60, the valve gear 52 and the end 31 of the shaft 30 are fixed so as not to rotate relative to each other during driving. As shown in FIGS. 8 and 9, in the first embodiment, the valve gear 52 and the end portion 31 of the shaft 30 are fixed by welding. As a result, the valve subassembly 43 is attached to the housing 10 of the valve device 1.

The valve device 1 of the first embodiment described above and the method for manufacturing the valve device 1 have the following effects.
(1) The shaft 30 included in the valve device 1 of the first embodiment has a positioning portion 32 capable of positioning in the rotational direction. The shaft 30 and the valve gear 52 are fitted in a state where they can rotate relative to each other when assembled, and the shaft 30 and the valve gear 52 are fixed so as not to rotate relative to each other when driven.
According to this, since the shaft 30 has the positioning portion 32, when the valve body 40 and the shaft 30 are integrally formed by insert molding, the valve body 40 is positioned in the rotational direction of the shaft 30. It is possible. Therefore, it is possible to reduce the variation in quality of the valve subassembly 43 in which the valve body 40 and the shaft 30 are integrated.
Further, since the shaft 30 and the valve gear 52 are fitted in a state of being relatively rotatable at the time of assembly, the rotation angle of the shaft 30 and the valve gear 52 is adjusted according to the position of the valve seat 20 of the housing 10. It is possible to do. Then, after adjusting the rotation angles of the shaft 30 and the valve gear 52, it is possible to fix them so that they do not rotate relative to each other during driving. Therefore, the valve device 1 can suppress an increase in the types of the valve gear 52 and the shaft 30, and reduce the manufacturing cost.

(2) In the first embodiment, the positioning portion 32 is provided at the end portion 31 of the shaft 30 which is a portion of the shaft 30 where the valve gear 52 is fitted.
This makes it possible to provide the positioning portion 32 without changing the length of the shaft 30 with respect to the conventional product. Therefore, it is possible to prevent the valve device 1 from becoming large in size.

(3) In the first embodiment, the positioning portion 32 has a shape in which a part of the end portion 31 of the shaft 30 in the circumferential direction is recessed inward in the radial direction with respect to the circle. On the other hand, the fitting hole 57 of the valve gear 52 is circular. The shaft 30 and the valve gear 52 are fixed by welding.
This makes it possible to provide the positioning portion 32 with respect to the shaft 30 in a simple configuration. Therefore, the manufacturing cost can be reduced.

(4) In the first embodiment, the method of manufacturing the valve device 1 is to insert-mold the shaft 30 and the valve body 40 in a state where the shaft 30 is positioned in the rotational direction by the positioning portion 32 provided on the shaft 30. Form integrally. After that, the valve gear 52 and the shaft 30 are fitted in a relatively rotatable state, the valve gear 52 and the shaft 30 are aligned, and then the valve gear 52 and the shaft 30 are fixed by welding.
By this manufacturing method, it is possible to reduce the variation in the quality of the valve subassembly 43, suppress the increase in the types of the valve gear 52 and the shaft 30, and reduce the manufacturing cost.

(Second Embodiment)
The second embodiment will be described. The second embodiment is mainly a modification of the configuration of the positioning portion 321 of the shaft 30 with respect to the first embodiment.

As shown in FIGS. 14 and 15, in the second embodiment, the positioning portion 321 provided on the shaft 30 is provided on the shaft intermediate portion 34. The shaft intermediate portion 34 is a portion of the shaft 30 between the end portion 31 into which the valve gear 52 is fitted and the portion inserted into the valve body 40. Further, the positioning portion 321 is provided so as to be in contact with the stepped portion 35 of the shaft 30 in the shaft intermediate portion 34. Further, the positioning portion 321 is provided at a position in the shaft intermediate portion 34 that does not affect the functions of the bearing 21 and the seal member 22.

The positioning portion 321 has a shape in which a part of the shaft 30 in the circumferential direction is recessed inward in the radial direction with respect to the circle. Specifically, the positioning portion 321 has a so-called D-cut shape in which a part of the shaft intermediate portion 34 in the circumferential direction is cut out in a straight line. Similar to the first embodiment, the positioning portion 321 of the second embodiment is also used for positioning the shaft 30 in the rotational direction when the shaft 30 and the valve body 40 are insert-molded. That is, when the shaft 30 and the plate 33 are installed in the mold at the time of injection molding of the valve subassembly 43, the shaft 30 is brought into contact with the positioning portion 321 provided in the shaft intermediate portion 34 and the inner wall surface of the mold. Positioning in the direction of rotation is performed.

In the second embodiment, the end 31 of the shaft 30 on the side where the valve gear 52 is fitted is circular when viewed from the axial direction. Therefore, in the second embodiment, both welding and crimping methods can be adopted as the fixing method between the shaft 30 and the valve gear 52.

Since the method of fixing the end 31 of the shaft 30 and the valve gear 52 by welding has been described in the first embodiment, the description thereof will be omitted. Instead, in the second embodiment, a method of fixing the shaft 30 and the valve gear 52 by crimping will be described.

As shown in FIG. 16, in the second embodiment, the fitting hole 571 in which the valve gear 52 fits into the end portion 31 of the shaft 30 has a shape in which irregularities in the radial direction are arranged in the circumferential direction. In the present specification, this shape is referred to as a petal shape. The diameter of the petal-shaped inscribed circle is the same as or slightly larger than the outer diameter of the end 31 of the shaft 30. Therefore, the petal shape formed in the fitting hole 571 of the valve gear 52 and the end portion 31 of the shaft 30 are fitted in a relatively rotatable state.

The alignment of the valve gear 52 and the shaft 30 is performed with the valve subassembly 43 arranged in the valve chamber 15 of the housing 10. At that time, as shown in FIG. 17, with the valve subassembly 43 arranged in the valve chamber 15 of the housing 10, a part of the valve subassembly 43 in the circumferential direction is provided in the valve chamber 15 of the housing 10. 1 Contact the contact portion 81. In this state, the valve body 40 is seated on the valve seat 20 of the valve seat member 19 provided in the EGR passage 18, and the EGR passage 18 is closed.

Next, as shown in FIGS. 18 and 19, the fitting hole 571 of the valve gear 52 is fitted to the end 31 of the shaft 30 protruding from the valve chamber 15 side of the housing 10 to the drive chamber 51 side. At that time, as shown in FIG. 18, a part of the valve gear 52 in the circumferential direction comes into contact with the second contact portion 82 provided in the drive chamber 51. As a result, the positions of the valve gear 52 and the shaft 30 are determined according to the orientation of the fluid passage 11 formed in the housing 10 and the position of the valve seat 20. Further, dimensional variations due to manufacturing tolerances and the like are absorbed by the alignment of the shaft 30 and the valve gear 52.

Subsequently, as shown by the arrow F in FIG. 19, so-called rolling crimping is performed by pressing the end 31 of the shaft 30 from the axial direction with a jig (not shown) or the like. As a result, as shown in FIGS. 20 and 21, the metal material at the end 31 of the shaft 30 plastically flows and enters the petal-shaped recess of the valve gear 52. Therefore, the shaft 30 and the valve gear 52 are fixed so as not to rotate relative to each other during driving. As a result, the valve subassembly 43 is attached to the housing 10.

Here, in order to compare with the second embodiment, a method of fixing the end of the shaft 300 and the valve gear 520 in the valve device of the comparative example will be described.

FIG. 36 shows the valve subassembly 430 included in the valve device of the comparative example, and FIG. 37 shows the valve gear 520 included in the valve device of the comparative example. As shown in FIG. 36, in the comparative example, the end portion of the shaft 300 of the valve subassembly 430 has a shape having two planes 301 and 302 facing each other across the shaft of the shaft 300. Hereinafter, this portion is referred to as a width across flats shape portion 320.
Further, as shown in FIG. 37, in the comparative example, the fitting hole 570 of the valve gear 520 is a two-sided width-shaped hole having a shape corresponding to the two-sided width-shaped portion 320 provided at the end of the shaft 300. There is. Therefore, in the valve device of the comparative example, the fitting hole 570 (that is, the two-sided width shape hole) of the valve gear 520 is fitted so as not to rotate relative to the two-sided width shape portion 320 provided at the end of the shaft 300. It is fixed together. Therefore, the valve device 1 has a configuration in which the orientation of the valve body 40 with respect to the shaft 300 and the orientation of the valve gear 520 are uniquely determined.

38 and 39 show a state in which the valve subassembly 430 is attached to the housing 10. In the configuration of the comparative example described above, the rotation angle between the valve seat 20 included in the housing 10 and the valve subassembly 430 may vary due to manufacturing tolerances. Therefore, in the comparative example, the drive chamber 51 is provided with the adjusting device 830. The adjusting device 830 is composed of a screw hole member 840 fixed to the housing 10 and a screw member 850 screwed into the screw hole member 840.

With the valve subassembly 430 attached to the housing 10, a part of the valve gear 520 in the circumferential direction comes into contact with the screw member 850 of the adjusting device 830. When the screw member 850 is rotated about the axis in this state, the amount of protrusion of the screw member 850 from the screw hole member 840 changes, and the rotation angle of the valve subassembly 430 can be adjusted. By this adjustment, the valve body 40 is seated on the valve seat 20 of the valve seat member 19 provided in the EGR passage 18 in a state where a part of the valve gear 520 in the circumferential direction is in contact with the screw member 850 of the adjusting device 830. The EGR passage 18 is blocked.

The valve device 1 of the second embodiment described above has the following effects on the valve device of the comparative example.
That is, the valve device 1 of the second embodiment does not rotate relative to the valve gear 52 after adjusting the rotation angles of the shaft 30 and the valve gear 52 in a state where the valve subassembly 43 is arranged in the fluid passage 11 of the housing 10. It is possible to fix it like this. As a result, the valve device 1 of the second embodiment can eliminate the adjusting device 830 and the adjusting process thereof provided in the valve device of the comparative example, and can reduce the manufacturing cost. It should be noted that this effect can be similarly exerted in the configuration of the valve device 1 described in the first embodiment. In addition, the valve device 1 of the second embodiment can exert the same effect as that of the first embodiment.

(Third Embodiment)
The third embodiment will be described. The third embodiment is also a modification of the configuration of the positioning portion of the shaft 30 mainly with respect to the first embodiment and the like.

As shown in FIGS. 22 and 23, in the third embodiment as in the second embodiment, the positioning portion 322 provided on the shaft 30 is provided on the shaft intermediate portion 34. The positioning portion 322 is provided at a position in the shaft intermediate portion 34 that does not affect the functions of the bearing 21 and the seal member 22.

Specifically, the seal member 22 includes an annular metal cover 221 fixed to the housing 10, a resin seal 222 provided inside the metal cover 221 and a member 223 that supports the resin seal 222. The portion where the resin seal 222 is in contact with the outer wall of the shaft 30 is the seal surface. On the other hand, the positioning portion 322 of the shaft 30 is provided inside the metal cover 221 included in the seal member 22 and on the valve body 40 side of the seal surface of the resin seal 222. Therefore, the positioning portion 322 is provided at a position that does not affect the sealing function of the sealing member 22. Further, since the positioning portion 322 is provided inside the metal cover 221 of the seal member 22, it does not affect the total length of the shaft 30.

The positioning portion 322 has a shape in which a part of the shaft 30 in the circumferential direction is recessed inward in the radial direction with respect to the circle. Specifically, the positioning portion 322 has a so-called D-cut shape in which a part of the shaft 30 in the circumferential direction is cut out in a straight line. The positioning unit 32 of the third embodiment is also used for positioning the shaft 30 in the rotational direction when the shaft 30 and the valve body 40 are insert-molded, as in the first embodiment and the like.

Further, the end 31 of the shaft 30 on the side where the valve gear 52 is fitted is circular when viewed from the axial direction. Therefore, in the third embodiment as well as in the second embodiment, either welding or crimping can be adopted as the fixing method between the shaft 30 and the valve gear 52.

The valve device 1 of the third embodiment described above can exert the same effect as that of the first embodiment and the like.

(Fourth Embodiment)
A fourth embodiment will be described. The fourth embodiment is also a modification of the configuration of the positioning portion of the shaft 30 with respect to the first embodiment and the like.

As shown in FIGS. 24 to 26, in the fourth embodiment, the positioning portion 323 provided on the shaft 30 is a portion of the shaft 30 from which the valve gear 52 is fitted to the valve body 40 from the end portion 31 of the shaft 30. Is provided so as to project to the opposite side. The positioning portion 323 has a two-sided width shape having two surfaces facing each other with the shaft 30 interposed therebetween. Similar to the first embodiment, the positioning unit 323 of the fourth embodiment is also used for positioning the shaft 30 in the rotational direction when the shaft 30 and the valve body 40 are insert-molded.

Further, in the fourth embodiment, the end portion 31 of the shaft 30, which is a portion of the shaft 30 where the valve gear 52 is fitted, is circular when viewed from the axial direction. On the other hand, the fitting hole 57 of the valve gear 52 is circular. Therefore, in the fourth embodiment, the end portion 31 of the shaft 30 and the valve gear 52 can be fixed on the entire circumference by welding.

The valve device 1 of the fourth embodiment described above can exert the same effect as that of the first embodiment and the like.
As a modification of the fourth embodiment, as shown in FIG. 27, the width across flats forming the positioning portion 323 may be formed large in the radial direction within the range of the outer diameter of the shaft 30.

(Fifth Embodiment)
A fifth embodiment will be described. The fifth embodiment is also a modification of the configuration of the positioning portion of the shaft 30 with respect to the first embodiment and the like.

As shown in FIGS. 28 and 29, also in the fifth embodiment, the positioning portion 324 provided on the shaft 30 is connected to the valve body 40 from the end 31 of the shaft 30, which is a portion of the shaft 30 where the valve gear 52 is fitted. Is provided so as to project to the opposite side. The positioning portion 324 has a chevron shape in which the distance between the two surfaces facing each other across the shaft of the shaft 30 gradually approaches toward the tip. Similar to the first embodiment, the positioning unit 324 of the fifth embodiment is also used for positioning the shaft 30 in the rotational direction when the shaft 30 and the valve body 40 are insert-molded. Specifically, at the time of insert molding, the shaft 30 can be positioned in the rotational direction by supporting the chevron-shaped positioning portion 324 of the shaft 30 with a mold or a jig. Therefore, by simplifying the manufacturing process, the manufacturing cost can be reduced.

Further, also in the fifth embodiment, the end portion 31 of the shaft 30, which is a portion of the shaft 30 where the valve gear 52 is fitted, is circular when viewed from the axial direction. On the other hand, the fitting hole 57 of the valve gear 52 is circular. Therefore, also in the fifth embodiment, as in the fourth embodiment, the end portion 31 of the shaft 30 and the valve gear 52 can be fixed on the entire circumference by welding.

The valve device 1 of the fifth embodiment described above can exert the same effect as that of the first embodiment and the like.

(Sixth Embodiment)
The sixth embodiment will be described. The sixth embodiment is also a modification of the configuration of the position of the shaft 30 mainly with respect to the first embodiment and the like.

As shown in FIGS. 30 and 31, the positioning portion 325 of the shaft 30 of the sixth embodiment is the end portion 31 of the shaft 30 which is a portion of the shaft 30 to which the valve gear 52 is fitted, as in the first embodiment. It is provided in. The positioning portion 325 has an even-numbered polygonal outer wall in the radial direction of the end portion 31 of the shaft 30.

On the other hand, the fitting hole 571 of the valve gear 52 can use a petal shape. The diameter of the petal-shaped inscribed circle formed in the fitting hole 571 is the same as or slightly larger than the diameter of the polygonal circumscribed circle of the positioning portion 325 provided at the end 31 of the shaft 30. Will be done. Therefore, the petal shape formed in the fitting hole 571 of the valve gear 52 and the end portion 31 of the shaft 30 are fitted in a relatively rotatable state. In that state, the shaft 30 and the valve gear 52 are positioned in the rotational direction. After that, the shaft 30 and the valve gear 52 are fixed by crimping so that the end portion 31 of the shaft 30 is plastically flowed.

The positioning unit 325 of the sixth embodiment is also used for positioning the shaft 30 in the rotational direction when the shaft 30 and the valve body 40 are insert-molded, as in the first embodiment and the like. Specifically, at the time of insert molding, two faces of the polygons constituting the positioning portion 325 facing the axis of the shaft 30 are arranged parallel to the eject direction, and the two faces and the inside of the mold are arranged. Make contact with the wall surface. The eject direction is the direction in which the valve subassembly 43 is taken out from the mold at the time of insert molding. By arranging the positioning portion 325 of the shaft 30 in the mold in this way, the valve subassembly 43 can be easily taken out from the mold in the mold opening step of insert molding. Therefore, the manufacturing cost can be reduced.

The valve device 1 of the sixth embodiment described above can exert the same effects as those of the first embodiment and the like.

(7th Embodiment)
A seventh embodiment will be described. The seventh embodiment is a modification of the first embodiment and the like, in which a part of the configuration of the positioning portion of the shaft 30 and the valve body 40 is mainly changed.

As shown in FIGS. 32 and 33, in the seventh embodiment, the positioning portion 326 provided on the shaft 30 is provided at a portion of the shaft 30 to be inserted into the valve body 40. Specifically, the positioning portion 326 is provided on the surface of the plate 33 of the shaft 30 that faces the circumferential direction of the shaft 30. The positioning portion 326 is provided so as to be exposed in the deep portion of the hole 44 provided in a part of the valve body 40.

The positioning unit 326 of the seventh embodiment is also used for positioning the shaft 30 in the rotational direction when the shaft 30 and the valve body 40 are insert-molded. In FIGS. 34 and 35, an example of a mold opening step is shown in each step of injection molding.

As shown in FIGS. 34 and 35, the lower mold 72 is provided with a support portion 73 extending in the eject direction. The support portion 73 is in contact with a positioning portion 326 provided on a surface of the plate 33 facing the circumferential direction of the shaft 30. Therefore, in injection molding, when the shaft 30 is installed on the lower mold 72, the support portion 73 can position the shaft 30 in the rotational direction. That is, the rotation of the shaft 30 is restricted at the position where the positioning portion 326 and the support portion 73 of the lower mold 72 are in contact with each other.

When the valve subassembly 43 is taken out from the lower mold 72 in the injection molding take-out process, the valve main body has almost the same shape as the support portion 73 at the portion where the support portion 73 of the lower mold 72 is arranged. A hole 44 is formed. Then, the positioning portion 326 of the shaft 30 is exposed in the deep portion of the hole 44 of the valve body.

In the valve device 1 of the seventh embodiment described above, when the valve subassembly 43 is injection-molded, the support portion 73 provided on the lower mold 72 supports the positioning portion 326 of the shaft 30, and the valve device 1 in the rotation direction of the shaft 30 It is for positioning. Therefore, it is possible to position the shaft 30 in the rotational direction without processing the shaft 30. Therefore, the manufacturing cost can be reduced.

Further, in the valve device 1 of the seventh embodiment, since the positioning portion 326 is provided in the shaft 30 at a portion different from the portion where the valve gear 52 fits, the shaft 30 which is the portion of the shaft 30 where the valve gear 52 fits. The end 31 of the can be circular. Therefore, in the seventh embodiment, both welding and crimping methods can be adopted as the fixing method between the shaft 30 and the valve gear 52.
In addition, the valve device 1 of the seventh embodiment can exhibit the same effects as those of the first embodiment and the like.

(Other embodiments)
The present disclosure is not limited to the above-described embodiment, and can be changed as appropriate. Further, the above-described embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential and when they are clearly considered to be essential in principle. No. Further, in each of the above embodiments, when numerical values such as the number, numerical values, amounts, and ranges of the constituent elements of the embodiment are mentioned, when it is clearly stated that they are particularly essential, and in principle, they are clearly limited to a specific number. It is not limited to the specific number except when it is done. In addition, in each of the above embodiments, when referring to the shape, positional relationship, etc. of a component or the like, the shape, unless otherwise specified or limited in principle to a specific shape, positional relationship, etc. It is not limited to the positional relationship.

(1) In each of the above embodiments, the valve device 1 has been described as an EGR valve used in the exhaust gas recirculation system 150, but the present invention is not limited to this. The valve device 1 can be used for various purposes of adjusting the flow rate of the fluid flowing through the fluid passage, such as adjusting the flow rate of the gaseous fuel of the fuel cell.

(2) In the seventh embodiment, the support portion 73 is provided on the lower mold 72, but the present invention is not limited to this, and the support portion 73 may be provided on the upper mold 71. Further, the support portion 73 is configured to support the plate 33 of the shaft 30, but the present invention is not limited to this, and the support portion 73 may be configured to support a part of the shaft body. The shaft 30 may not have the plate 33.

Claims (15)

1. In the valve device
   A motor (60) that outputs torque and
   A reduction mechanism (50) having a plurality of gears (52 to 55) for transmitting the torque of the motor, and
   A shaft (30) that rotates around an axis by transmitting torque from the reduction mechanism,
   A valve body (40) that is integrally formed with the shaft by insert molding and rotates together with the shaft.
   A fluid passage (11) in which the valve body is rotatably accommodated, and a housing (10) having a valve seat (20) in which the valve body is seated and detached are provided in a part of the fluid passage.
   The shaft has positioning portions (32, 321 to 326) capable of positioning in the rotational direction.
   Of the plurality of gears of the reduction mechanism, the valve gear (52) fitted to the end of the shaft and the shaft are fitted in a relatively rotatable state at the time of assembly, and the valve gear and the shaft are fitted. Is a valve device that is fixed so that it does not rotate relative to each other when driven.
2. The valve device according to claim 1, wherein the positioning portion (32) is provided at a portion (31) of the shaft where the valve gear is fitted.
3. The positioning portion (32) has a shape in which a part of the shaft in the circumferential direction is recessed inward in the radial direction with respect to the circle.
   The fitting hole (57) into which the valve gear fits into the shaft is circular.
   The valve device according to claim 2, wherein the shaft and the valve gear are fixed by welding.
4. The positioning portion (325) has an even-numbered polygonal outer wall in the radial direction of the shaft.
   The fitting hole (571) into which the valve gear is fitted to the shaft has a shape in which irregularities in the radial direction are lined up in the circumferential direction.
   The valve device according to claim 2, wherein the shaft and the valve gear are fixed by crimping by plastically flowing the end portion of the shaft.
5. The positioning portion (321, 322) is provided at a portion (34) of the shaft between the portion where the valve gear is fitted and the portion inserted into the valve body.
   The fitting holes (57, 571) into which the valve gear is fitted to the shaft have a shape or a circular shape in which radial irregularities are lined up in the circumferential direction.
   The valve device according to claim 1, wherein the shaft and the valve gear are fixed by welding or crimping.
6. The valve device according to claim 5, wherein the positioning portion has a shape in which a part of the shaft in the circumferential direction is recessed inward in the radial direction with respect to a circle.
7. The valve device includes a bearing (21) that rotatably supports the shaft with respect to the housing.
   A sealing member (22) fixed to the housing, slidably contacting the outer periphery of the shaft, and sealing between the fluid passage and the speed reduction mechanism is further provided.
   The valve device according to claim 5 or 6, wherein the positioning portion is provided at a position of the shaft that does not affect the functions of the bearing and the seal member.
8. The positioning portion (323, 324) is provided so as to project from a portion of the shaft where the valve gear fits to the side opposite to the valve body.
   The fitting hole (57) into which the valve gear fits into the shaft is circular.
   The valve device according to claim 1, wherein the shaft and the valve gear are fixed by welding.
9. The valve device according to claim 8, wherein the positioning portion (323) has a two-sided width shape having two surfaces facing each other across the shaft of the shaft.
10. The valve device according to claim 8, wherein the positioning portion (324) has a chevron shape in which the distance between two surfaces facing each other across the shaft of the shaft gradually approaches toward the tip.
11. The positioning portion (326) is provided at a portion of the shaft to be inserted into the valve body.
    The positioning portion is exposed in the deep portion of the hole (44) provided in a part of the valve body.
    The fitting holes (57, 571) into which the valve gear is fitted to the shaft have a shape or a circular shape in which radial irregularities are lined up in the circumferential direction.
    The valve device according to claim 1, wherein the shaft and the valve gear are fixed by welding or crimping.
12. The shaft has a plate (33) extending radially outward from the center of the shaft at a portion of the shaft to be inserted into the valve body.
    The valve device according to claim 11, wherein the positioning portion is provided on a surface of the plate facing the circumferential direction of the shaft.
13. A motor (60) that outputs torque and
    A reduction mechanism (50) having a plurality of gears (52 to 55) for transmitting the torque of the motor, and
    A shaft (30) that rotates around an axis by transmitting torque from the reduction mechanism,
    A valve body (40) that is integrally formed with the shaft by insert molding and rotates together with the shaft.
    A valve device including a fluid passage (11) in which the valve body is rotatably accommodated, and a housing (10) having a valve seat (20) in which the valve body is seated and detached in a part of the fluid passage. In the manufacturing method of
    Positioning of the shaft in the rotational direction is performed by positioning portions (32, 321 to 326) provided on the shaft, and the shaft and the valve body are integrally formed by insert molding (S20, S30).
    Of the plurality of gears of the reduction gear, the valve gear (52) fitted to the end of the shaft and the shaft are fitted in a relatively rotatable state (S40).
    Aligning the valve gear with the shaft (S50) and
    A method for manufacturing a valve device, comprising fixing the valve gear and the shaft by welding or crimping (S60).
14. Positioning the shaft in the rotational direction by the positioning portion provided on the shaft causes the positioning portion (326) provided at a portion of the shaft to be inserted into the valve body to be formed into a mold (71). , 72) is to be supported by the support portion (73) provided.
    When the valve subassembly (43) in which the shaft and the valve body are integrally formed by insert molding is taken out from the mold, a hole (44) in which the positioning portion is exposed at a position where the support portion is arranged. ) Is formed, according to claim 13. The method for manufacturing a valve device.
15. Aligning the valve gear with the shaft
    The method for manufacturing a valve device according to claim 13 or 14, wherein the valve subassembly in which the shaft and the valve body are integrally formed by insert molding is arranged in the fluid passage of the housing.

Images