KR102481534B1 - A valve for vehicle - Google Patents

Abstract

The present invention includes a valve housing in which a flow path is formed and a shaft hole is formed in a direction orthogonal to the flow path; a driving unit provided in the valve housing; an opening/closing unit including a shaft connected to the driving unit and a plate coupled to the shaft to selectively open/close the flow path to control the flow of gas passing through the flow path; and a cylindrical pipe disposed around the plate inside the passage and contacting the plate when the opening/closing part is closed.

Description

A valve for vehicle {A valve for vehicle}

The present invention relates to a valve for a vehicle, and more particularly, to a valve for a vehicle capable of reducing corrosion occurring in a region where the valve is opened and closed inside the valve housing.

A valve for a vehicle is provided to control a flow rate of air (fresh air) supplied to the engine of the vehicle or exhaust gas discharged from the engine.

As disclosed in Korean Patent Registration No. 10-1057066, the vehicle valve includes a housing, a driving unit provided in the housing, a driving force transmission unit connected to the driving unit and implemented as a gear assembly, and a shaft connected to the driving force transmission unit and performing a rotational motion. And, it is provided to be rotatable inside the flow path provided inside the housing, and is coupled to the shaft to adjust the opening degree of the flow path according to the rotational motion of the shaft and is composed of a valve plate responsible for opening and closing.

Typically, the valve plate is formed of a disc made of a metal material, and is coupled by a fastening member such as a bolt while being inserted into a slot formed in a central region of the shaft. And, the rotation center of the shaft is disposed in the central region of the flow path.

In these valves, when the shaft rotates and the valve plate becomes parallel to the flow direction in the flow path, it becomes fully open, and the valve plate is inclined with respect to the direction of flow in the flow path. When it touches the inner wall, it becomes completely closed.

However, in the process of repeating the completely open state and the closed state, a problem of corrosion due to foreign substances has been pointed out at a portion where the valve plate and the inner wall of the passage come into contact.

Korean Patent Registration No. 10-1057066 (2011.08.09)

The present invention has been made to solve the above problems, and an object of the present invention is to provide a valve for a vehicle in which a cylindrical pipe made of a material capable of minimizing corrosion is applied to a flow path formed inside a housing.

Another object of the present invention is to provide a vehicle valve in which a cylindrical pipe is applied to a flow path of a housing, and the cylindrical pipe is pre-processed so that a shaft is exposed on the flow path.

In order to solve the above problems, the present invention is a valve housing in which a flow path is formed and a shaft hole is formed in a direction orthogonal to the flow path; a driving unit provided in the valve housing; an opening/closing unit including a shaft connected to the driving unit and a plate coupled to the shaft to selectively open/close the flow path to control the flow of gas passing through the flow path; and a cylindrical pipe disposed around the plate inside the passage and contacting the plate when the opening/closing part is closed.

The cylindrical pipe may include a cylindrical portion having a hollow portion formed therein to correspond to the flow path and made of a stainless steel material, and a concave groove on the cylindrical portion in which an area corresponding to the shaft hole is at least partially opened.

The cylindrical portion has a first region thicker on one side along a direction of an imaginary extension line connecting the center of the flow path, and a second region thinner than the first region on the other side, and the first region and the second region Between the regions, a third region having an inner circumferential surface formed of a curved surface or an inclined surface may be included.

The cylindrical portion may include an outer jaw cut into a curved surface or flat surface different from the outer circumferential curvature outside the first region.

The cylindrical portion may include an inner jaw cut inward on an inner circumferential surface of the first region.

The housing may include a vent hole formed inside the shaft hole to communicate with the outside, and the vent hole may be positioned between the bushing and the needle bearing.

In addition, the present invention is a cylindrical pipe forming step in which both sides are opened and one cross section is formed in a circular shape and a hollow part is provided therein; placing the cylindrical pipe inside the mold so that the hollow portion is disposed on a flow path; mounting a mold pin inserted to correspond to the shaft hole of the housing and partially inserted into the groove of the cylindrical pipe; Forming a housing by injecting a base material into a mold; and removing the mold pin and removing the cooled residue in the state in which the base material of the housing material is filled in the groove. It provides a method for manufacturing a valve housing for a vehicle, characterized in that it comprises a.

The cylindrical pipe forming step includes processing a cylindrical portion, processing an outer chin of at least some planar shape along a width direction on an outer circumferential surface of the cylindrical portion, and processing an inner chin on an inner circumferential surface of the cylindrical portion. can do.

The forming of the housing includes a cutting step of performing at least one or a plurality of cutting processes among roughing, semi-finishing, and finishing on the channel or shaft hole, and a chamfering step of processing a first step or a second step on the shaft hole. can include

According to the vehicle valve according to an embodiment of the present invention,

Since the one-sided support structure can be applied, the assembly quality can be increased, the manufacturing cost can be reduced accordingly, and the corrosion-related problems in the passage can be solved by adding different materials to the cylindrical pipe using the insert casting method. .

In addition, by providing a vent hole inside the shaft hole, even when foreign matter is introduced, it can be quickly dried or discharged, thereby minimizing the occurrence of corrosion around the opening and closing part.

In addition, since the fastener for fixing the plate is fixed with an adhesive or laser welding, loosening of the fastener is prevented in advance, thereby improving the defect rate.

1 is a perspective view showing a valve for a vehicle according to an embodiment of the present invention.
Fig. 2 is a front view showing the front of the vehicle valve shown in Fig. 1;
FIG. 3 is an exploded perspective view illustrating an exploded vehicle valve shown in FIG. 1;
FIG. 4 is a longitudinal cross-sectional view showing a section II' of the vehicle valve shown in FIG. 1;
FIG. 5 is a partially enlarged view illustrating an enlarged flow path region of the vehicle valve shown in FIG. 4 .
6 is a cross-sectional view showing a section II-II' of the vehicle valve shown in FIG. 1;
FIG. 7 is an enlarged reference view illustrating a state in which a plate is further opened in the passage of the valve for a vehicle shown in FIG. 6 .
FIG. 8 is a reference diagram illustrating a cylindrical pipe of the valve for a vehicle shown in FIG. 3 .
FIG. 9 is a longitudinal cross-sectional view showing a section III-III' of the vehicle valve shown in FIG. 5;
10 is a flowchart showing a manufacturing method of a valve housing for a vehicle according to the present invention.
11 is a longitudinal cross-sectional view sequentially showing processing states according to manufacturing steps of a valve housing for a vehicle.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated and described in the drawings.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms.

These terms are only used for the purpose of distinguishing one component from another.

For example, a second element may be termed a first element, and similarly, a first element may be termed a second element, without departing from the scope of the present invention.

The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be.

On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings, but the same or corresponding components regardless of reference numerals are given the same reference numerals, and overlapping descriptions thereof will be omitted.

1 is a perspective view showing a valve for a vehicle according to an embodiment of the present invention, FIG. 2 is a front view showing the front of the valve for a vehicle shown in FIG. 1, and FIG. 3 is an exploded view showing the valve for a vehicle shown in FIG. It is a perspective view.

1 to 3 , a vehicle valve 100 according to an embodiment of the present invention includes a housing 110, a driving unit 120, an opening/closing unit 130, and a cylindrical pipe 140.

First, the housing 110 is a part forming the exterior of the vehicle valve 100 according to the present invention, and the driving unit 120, the opening and closing unit 130, and the cylindrical pipe 140 to be described later are accommodated therein.

A space for the flow of air or gas is formed inside the housing 110 by the inner wall, and in this embodiment, the space for the flow of air or gas is defined as a flow path (111).

The passage 111 inside the housing 110 according to an embodiment of the present invention is a passage for air to flow, and an opening/closing unit 130 to be described below is mounted on the passage to control the flow of air.

In addition, a shaft hole 112 in which the shaft 131 is installed is formed inside the housing 110 . One end of the shaft hole 112 is processed to communicate with the flow path 111 . At this time, the longitudinal direction of the shaft hole 112 may be formed in a direction orthogonal to an imaginary extension line L connecting the centers of the flow passages 111 .

And, the drive unit 120 provides a driving force to the opening/closing unit 130 that selectively blocks or permits air flow in the passage.

The driving unit 120 includes a motor 121, a gear unit 122 and a control unit 123.

The motor 121 is inserted into the motor insertion part 113 formed inside the housing 110, and the motor 121 is placed on the housing 110 while the motor cover 124 is fixed around the motor insertion part 113. can be fixed.

The gear unit 122 includes a pinion gear 122a, a reduction gear 122b and a shaft gear 122c.

The pinion gear 122a is coupled to the rotation shaft of the motor 121 and is arranged to mesh with the reduction gear 122b. The reduction gear 122b is a first gear (large diameter portion, 122b1) meshing with the pinion gear 122a, and a second gear integrally formed with the first gear 122b1 and having a smaller number of teeth than the first gear 122b1. It is provided in the form of a multilayer gear including (small diameter part, 122b2). The second gear 122b2 is arranged to mesh with the shaft gear 122c. Accordingly, the shaft gear 122c may provide a large torque to the opening/closing unit 130 while being decelerated more than the motor output.

The control unit 123 may control rotation of the motor 121 or rotation of the shaft gear 122c. For example, the control unit 123 may control the rotation direction or speed of the motor 121, or may detect the rotation state of the shaft gear 122c using the hall sensor 125.

On the housing 110, the driving unit 120 and the control unit 123 are covered by the housing cover 110', and the housing cover 110' supports a part of the driving unit 120 on the opposite side of the housing 110. may be

And, the opening and closing part 130 includes a shaft 131, a plate 132 and a valve ring 136.

One end of the shaft 131 is coupled to the shaft gear 122c so as to be rotatable inside the shaft hole 112 . A magnet 133 may be coupled to one end of the shaft 131 so that the Hall sensor 125 of the controller 123 can detect a rotational state.

A bushing 135a coupled to an outer circumferential surface of the shaft 131 and supporting the shaft 131, a needle bearing 135b, and a seal member 135c may be disposed inside the shaft hole 112. The bushing 135a may be made of bronze or brass. And, a torsion spring 135d providing restoring force to the shaft gear 122c is provided between the shaft gear 122c and the housing 110.

A plate 132 is coupled to the other end of the shaft 131 so that the plate 131 can open and close the passage 111 according to the rotation of the shaft 131 . In addition, the other end of the shaft 131 is exposed on the flow path 111 and may have a one-sided support structure that is not supported by the housing 110 . The support structure on one side of the shaft 131 is easy to assemble and has an effect of reducing manufacturing cost. Of course, in some cases, it may be applied as a support structure for both sides in addition to the one-side support structure.

In addition, the cylindrical pipe 140 may form one flow path 111 with two configurations of different materials while molding the housing 110 using an insert casting method while being inserted and fixed inside the flow path 111 . At this time, the cylindrical pipe 140 is formed with a groove (refer to FIG. 8, 141) so that the shaft 131 can be exposed in the direction of the flow path 111. For example, the housing 110 may be made of an aluminum material that is easy to process and is light, and the cylindrical pipe 140 may be made of a stainless steel material that is resistant to corrosion.

After the plate 132 is coupled to the shaft 131, a fastener f passes through the plate 132 and is fixed to the shaft 131, on one side or the other side of the fastener f, the shaft 131 and the fastener f. Adhesive (eg, Loctite 401) is applied to the coupled surface or laser welding is performed to prevent loosening of the fastener f from the shaft 131 .

Inside the housing 110, a sealing material 114 may be provided on a surface facing the driving unit 120 and the housing cover 110' or on a surface facing each other while the housing 110 and the housing cover 110' are coupled. there is.

4 is a longitudinal cross-sectional view showing the II' section of the valve for a vehicle shown in FIG. 1, FIG. 5 is a partially enlarged view showing a passage area of the valve for a vehicle shown in FIG. 4 in an enlarged manner, and FIG. It is a cross-sectional view showing the II-II' section of the valve, and FIG. 7 is a reference view showing an enlarged state in which the plate is further opened in the passage of the vehicle valve shown in FIG. 6 .

4 to 6, the shaft hole 112 is provided with a first step 115a so that a retaining washer 135e coupled to the outer circumferential surface of the shaft 131 can be supported, and a seal member A second step 115b may be provided adjacent to a region where 135c is coupled to the shaft 131 so that only a minimum assembly tolerance is formed between the shaft 131 and the shaft hole 112 .

Inside the housing 110, the cylindrical pipe 140 may partially overlap an area where the second step 115b is provided.

The shaft hole 112 may include a vent hole 115c formed to communicate with the outside of the housing 110 . The vent hole 115c guides condensate condensed inside the housing 110 or foreign substances such as air or moisture introduced from the flow path 111 into the shaft hole 112 to be discharged to the outside, and air is directed toward the driving unit 120. etc. can be prevented from entering. More preferably, the vent hole 115c may be located in a region between the bushing 135a and the needle bearing 135b.

As shown in FIG. 6 , the plate 132 includes a valve ring 136 in contact with the inner circumferential surface of the cylindrical pipe 140 . The valve ring 136 can improve shielding performance while reducing direct friction between the plate and the cylindrical pipe 140 . The valve ring 136 may be implemented with a material having less hardness and elasticity than the material of the cylindrical pipe 140 . The valve ring 136 may have a sealing function of a piston ring or gasket.

6 and 7, while the plate 132 rotates inside the flow path 111, the valve ring 136 and the inner circumferential surface of the cylindrical pipe 140 repeatedly come into contact. At this time, the valve ring 136 or the plate ( 132) and the inner circumferential surface of the cylindrical pipe 140 may partially accumulate moisture and foreign matter contained in the air. When moisture and foreign substances are gradually deposited, corrosion occurs between the cylindrical pipe 140 and the valve ring 136. Since the valve ring 136 is in continuous contact with the inner circumferential surface of the cylindrical pipe 140, there is a possibility of corrosion. Corrosion may occur on the inner circumferential surface of the low, typically cylindrical pipe 140.

As a countermeasure to prevent this problem, a cylindrical pipe 140 made of corrosion-resistant stainless steel is placed at the position of the channel 111 of the housing 110, and then a part of the channel 111 is manufactured by an insert casting method.

FIG. 8 is a reference diagram illustrating a cylindrical pipe of the vehicle valve shown in FIG. 3 .

Referring to FIG. 8 , the cylindrical pipe 140 includes a cylindrical portion 142 made of stainless steel, and a groove 141 in which the shaft 131 is inserted is at least partially open on the cylindrical portion 142. .

The cylindrical portion 142 has a ring shape having a predetermined width, and a hollow portion 143 formed to correspond to the flow path 111 is provided therein. That is, the passage 111 and the hollow part 143 may have the same or similar inner diameters.

The groove 141 may have a size corresponding to the inner diameter of the shaft hole 112 . The groove 141 may have a substantially “U”-shaped cross section while one side of the cylindrical portion 142 is dug along the width direction. Of course, the groove 141 may be formed to pass through the central region of the cylindrical portion 142 .

The cylindrical portion 142 includes a first area 144 , a second area 145 and a third area 146 .

The first region 144 is disposed on one side of the cylindrical portion 142 along a direction of an imaginary extension line (see L in FIG. 3 ) connecting the center of the flow path 111 and has the thickest thickness.

The second region 145 is disposed on the other side of the cylindrical portion 142 and has a thinner thickness than the first region 144 .

The third region 146 is a portion connecting the first region 144 and the second region 145 and may have an inner circumferential surface formed of a curved surface or an inclined surface.

That is, the outer diameter of the first region 144 to the third region 146 of the cylindrical portion 142 is the same, but a difference occurs in the inner diameter and a difference in thickness occurs.

In the cylindrical portion 142 , an outer jaw 147 is provided on the outer circumferential surface of the first region 144 , and an inner jaw 148 is provided on the inner circumferential surface of the first region 144 .

The outer jaw 147 may be formed while being cut into a curved surface or flat surface different from the outer circumferential curvature. In this embodiment, a shape in which the outer jaw 147 is cut in a plane will be described as an example. The outer jaw 147 may form a section in which the cylindrical pipe 140 having a circular cross section contacts the housing 110 in a plane-to-plane pattern during an insert casting process. That is, when the housing 110 and the cylindrical pipe 140 come into contact only with a curved surface having a constant curvature, slip may occur between them or relative rotation may occur at a predetermined angle, so that this can be prevented through the outer jaw 147 can

In the process of insert casting the cylindrical pipe 140 and the housing 110, the inner jaw 148 can be gripped by a jig (not shown) when the cylindrical pipe 140 is fixed on the channel 111 of the housing 110. part you can. A plurality of inner jaws 148 may be formed on the inner circumferential surface of the first region 144 of the cylindrical portion 142 . That is, while the jig is inserted into the inner jaw 148 of the cylindrical portion 142, the cylindrical pipe 140 can be mounted in the flow path 111 region, and the housing 110 is installed in a state where the cylindrical pipe 140 is mounted. Molding of the housing 110 is completed as the molten base material to be molded is filled.

The plate 132 or the valve ring 136 may come into contact with the inner circumferential surface of the second area of the cylindrical pipe 140 in the process of closing the opening/closing part 130, and for smooth opening and closing operation of the plate 132, the second area ( 145) is preferably made of a curved or inclined surface shape.

FIG. 9 is a longitudinal cross-sectional view showing a section III-III' of the vehicle valve shown in FIG. 5;

9 shows a state in which the shaft hole 112 and the passage 111 are partially cut along the longitudinal direction of the housing 110, but the cylindrical pipe 140 is omitted on the passage 111.

8 and 9, the housing 110 has an inner jaw support 118 inserted in the direction of the inner jaw 148 on the flow path 111 protrudes, and is made of a plane so as to face the outer jaw 147. The outer jaw support 117 protrudes.

That is, a jig (not shown) is inserted into the inner jaw 148 of the cylindrical portion 142, and the inner jaw support 118 is filled in a portion other than a region where the jig is inserted and molded into one configuration. Of course, after removing the jig, the inner chin support 118 may be separately molded using the same material as the housing 110, or may be additionally molded to fill a portion where the jig is removed.

In addition, the outer jaw support 117 may prevent rotation of the cylindrical pipe 140 by being provided while the base material is filled in the outer jaw 147 area during the molding process of the housing 110 .

In addition, the first step 115a and the second step 115b inside the shaft hole 112 can be formed more precisely through secondary processing. For example, the first step 115a and the second step 115b may be simultaneously processed during the molding process of the housing 110, and after the processing is completed, the first step 115a and the second step 115b are processed using a tool (not shown). The second step 115b may be post-processed. Of course, after the shaft hole 112 without steps is pre-processed, the first step 115a and the second step 115b may be formed by post-processing using a tool.

10 is a flow chart showing a manufacturing method of a valve housing for a vehicle according to the present invention, and FIG. 11 is a longitudinal cross-sectional view sequentially showing processing states according to manufacturing steps of the valve housing for a vehicle according to the present invention.

Hereinafter, the manufacturing method (S100) of the valve housing for a vehicle according to the present invention will be described in detail with reference to the drawings.

The manufacturing method (S100) of the vehicle valve housing of the present invention includes a cylindrical pipe forming step (S110), a cylindrical pipe mounting step (S120), a mold pin mounting step (S130), a housing forming step (S140), and and a residue removal step (S150).

First, the cylindrical pipe forming step (S110) includes a cylindrical portion processing step (S111), an outer jaw processing step (S112), and an inner jaw processing step (S113).

In the cylindrical portion processing step (S111), a cylindrical portion having a predetermined width is processed. The cylindrical portion is preferably made of a stainless steel material.

At this time, it is preferable that the hollow portion inside the cylindrical portion is at least smaller than the inner diameter of the passage to be formed inside the housing. The cylindrical part is manufactured to be no larger than the inner diameter of the passage because post-processing is performed after the molding of the housing is completed.

In the outer jaw processing step (S112), a plurality of outer jaws are cut on the outer circumferential surface of the cylindrical portion. The outer jaw is preferably processed to a width of about 50% or less along the width direction of the cylindrical portion within a range not exceeding 50% of the thickness of the cylindrical portion. At least one pair of outer jaws are disposed to face each other with respect to the hollow part, and in the present embodiment, two pairs of planar parts are disposed equiangularly with respect to the center of the hollow part.

In the inner jaw processing step (S113), a plurality of inner jaws dug inward on the inner circumferential surface of the cylindrical portion are cut. The inner jaw is formed at a conformal angle in the first area (see FIG. 8, 144).

11A is a longitudinal sectional view showing a molded state of a valve housing for a vehicle according to the present invention.

Referring to FIG. 11A , in step S120 of placing the cylindrical pipe, the cylindrical pipe 150 is placed to correspond to the position where the flow path is to be formed inside the mold (not shown). At this time, although not shown in the drawings, a jig supporting a plurality of inner jaws is disposed inside the mold, and the jig mounts the cylindrical pipe 150 to correspond to the region where the flow path 111 of the housing 110 is to be formed.

FIG. 11B is a longitudinal cross-sectional view showing a state in which a mold pin is inserted into the shaft hole shown in FIG. 11A.

When mounting of the cylindrical pipe 150 is completed, the mold pin 10 is inserted to correspond to the position of the shaft hole 112 . At this time, the mold pin 10 is inserted at least partially through the groove (see FIG. 11A, 141). Although not shown in the drawing, a stepped structure corresponding to the first step or the second step may be provided in the mold pin 10 .

In the housing molding step (S140), the housing is molded by injecting the molten base material into an area except for the cylindrical pipe 150 inside the mold. When the injected base material is cooled, the housing 110 having an external shape is completed.

The housing molding step (S140) includes a cutting step (S141) in which at least one or a plurality of cutting processes of roughing, semi-finishing, and finishing are performed on the channel 111 or the shaft hole (see FIG. 11A, 112), and a first step on the shaft hole. Or a chamfering step (S142) of processing the second step. The cutting step (S141) and the chamfering step may be partially performed after the residue removal step.

FIG. 11C is a base material of the housing material remaining inside the groove (see FIG. 11A, 141) using a dedicated tool 30 after the mold pin (see FIG. 11B, 10) is removed from the shaft hole 112 shown in FIG. 11B. It is a longitudinal cross-sectional view showing a state in which the cooled residue 20 is removed in a filled state.

When the mold pin 10 is removed from the shaft hole 112, the base material forming the housing 110 is cooled, leaving a residue 20 around the groove 141. The residue removal step (S150) is dedicated to This residue 20 is removed using a tool 30 . Here, the residue 20 is made of the same aluminum material as the housing 110, and when the residue 20 is cut with the tool 30, at least some residue remains on the inner circumferential surface of the groove 141. At this time, since the inner circumferential surface of the groove 141 is made of stainless steel, when cutting through the tool 30, another burr is generated, so it is preferable to process it so as to leave some residue. After that, when the shaft (see FIG. 3, 131) is coupled to the shaft hole 112, a minimum coupling tolerance is formed between some remaining residue and the shaft, and contact occurs between the groove 141 and the shaft or foreign matter Some of the residue remaining when this is pinched may perform a buffer function to prevent direct contact between the cylindrical pipe 150 and the shaft.

11D is a longitudinal cross-sectional view showing a state in which machining of a shaft hole and a flow path inside a valve housing for a vehicle according to the present invention is completed.

After removing the residue generated inside the groove 141, machining of the shaft hole 112 to which the shaft is to be mounted is completed, as shown in FIG. 11D.

Also, as described above, after the residue removal step (S150), at least a part of the cutting step (S141) and the chamfering step (S142) of the housing forming step (S140) may be performed.

Therefore, according to the valve for a vehicle according to an embodiment of the present invention, since a one-sided support structure can be applied, assemblability is increased, manufacturing cost can be reduced accordingly, and a cylindrical pipe is made of different materials by an insert casting method. By adding it, there is an effect of solving problems related to corrosion in the passage. In addition, by providing a vent hole inside the shaft hole, even when foreign matter is introduced, it can be quickly dried or discharged, thereby minimizing the occurrence of corrosion around the opening and closing part. In addition, since the fastener for fixing the plate is fixed with an adhesive or laser welding, loosening of the fastener is prevented in advance, thereby improving the defect rate.

Although the above has been shown and described as specific embodiments to illustrate the technical idea of the present invention, the present invention is not limited to the same configuration and operation as the specific embodiments as described above, and various modifications do not depart from the scope of the present invention. can be carried out within Accordingly, such modifications are to be regarded as falling within the scope of the present invention, which scope is to be determined by the claims set forth below.

100: vehicle valve
110: housing
120: driving unit
130: opening and closing part
140: cylindrical pipe

Claims (10)

a valve housing in which a flow path is formed and a shaft hole is formed in a direction orthogonal to the flow path;
a driving unit provided in the valve housing;
an opening/closing unit including a shaft connected to the driving unit and a plate coupled to the shaft to selectively open/close the flow path to control the flow of gas passing through the flow path; and
a cylindrical pipe disposed around the plate inside the passage and contacting the plate when the opening/closing part is closed; including,
The cylindrical pipe includes a cylindrical portion in which a hollow portion is provided therein to correspond to the flow path, and a groove in which an area corresponding to the shaft hole is at least partially opened on the cylindrical portion,
The cylindrical portion has a first region thicker on one side along a direction of an imaginary extension line connecting the center of the flow path, and a second region thinner than the first region on the other side, and the first region and the second region Including a third region whose inner circumferential surface is made of a curved surface or an inclined surface between the regions,
The valve for a vehicle, characterized in that the cylindrical portion includes an outer jaw cut into a curved surface or flat surface different from the curvature of the outer circumferential surface outside the first region. delete delete delete The method of claim 1,
The cylindrical part,
A valve for a vehicle comprising an inner jaw cut inward on an inner circumferential surface of the first region. The method of claim 1,
The opening part,
A bushing coupled to the outer circumferential surface of the shaft and supported inside the shaft hole;
A needle bearing for rotatably supporting the shaft;
A seal member for shielding between the cylindrical portion and the shaft hole, and
and a retaining washer disposed between the needle bearing and the seal member, inserted into a groove formed on an outer circumferential surface of the shaft, and supported by a first step formed on an inner circumferential surface of the shaft hole. The method of claim 6,
the housing,
A vent hole formed inside the shaft hole to communicate with the outside,
The vent hole is a vehicle valve, characterized in that located between the bushing and the needle bearing. A cylindrical pipe forming step in which both sides are open and one cross section is formed in a circular shape and a hollow part is provided therein;
placing the cylindrical pipe inside the mold so that the hollow part is disposed on a flow path to be formed inside the housing;
mounting a mold pin inserted to correspond to a shaft hole to be formed inside the housing and partially inserted into a groove of the cylindrical pipe;
Forming a housing by injecting a base material into a mold; and
removing the mold pin and removing the cooled residue in the state in which the base material of the housing material is filled in the groove; including,
The method of manufacturing a valve housing for a vehicle, characterized in that the step of forming the cylindrical pipe includes processing a cylindrical portion and processing at least some flat outer jaws along an outer circumferential surface of the cylindrical portion along a width direction. The method of claim 8,
The cylindrical pipe forming step,
A method of manufacturing a valve housing for a vehicle comprising the step of processing an inner jaw on the inner circumferential surface of the cylindrical portion. The method of claim 8,
The step of molding the housing is,
A cutting step in which at least one or a plurality of cutting processes of roughing, semi-finishing, and finishing are performed on the channel or shaft hole;
The method of manufacturing a valve housing for a vehicle comprising a chamfering step of processing a first step or a second step in the shaft hole.

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