KR102503298B1 - 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 prismatic ring disposed around the plate inside the passage, contacting the plate when the opening/closing part is closed, and having at least one flat part on an outer circumferential surface; It provides a valve for a vehicle, characterized in that it comprises a.

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 prismatic ring 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 valve for a vehicle in which a prismatic ring is applied to a flow path of a housing, and the prismatic ring is pre-processed and applied 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 prismatic ring disposed around the plate inside the passage, contacting the plate when the opening/closing part is closed, and having at least one flat part on an outer circumferential surface; It provides a valve for a vehicle, characterized in that it comprises a.

The prismatic ring 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 through hole through which an area corresponding to the shaft hole passes through the cylindrical portion.

The prismatic ring may be disposed such that the plane portion corresponds to a position of the shaft hole.

The cylindrical portion includes an inner jaw cut inward on an inner circumferential surface, and after molding of the housing is completed, the inner jaw may be removed while cutting the passage and the hollow part.

The flat part may be formed along the width direction of the cylindrical part, and a plurality of flat parts may be arranged at equal intervals from each other along the circumferential direction of the cylindrical part.

In the case of the support structure on both sides, the housing includes an upper shaft hole and a lower shaft hole disposed to face each other with respect to the flow path, and in the upper shaft hole, a needle bearing coupled to an outer circumferential surface of the shaft, and a needle bearing A retaining washer disposed at a lower portion and a seal member for shielding between the upper shaft hole and the passage are sequentially provided, and the lower shaft hole is provided with a bushing supporting the end of the shaft and a cap covering the end of the lower shaft hole. It can be.

The housing may include a vent hole formed so that a side surface adjacent to the driving unit communicates with the outside.

In the case of the housing having a one-sided support structure, the shaft hole includes a bushing coupled to the outer circumferential surface of the shaft, a needle bearing, a retaining washer disposed below the needle bearing, and a sealing member for shielding between the upper shaft hole and the flow path may be provided sequentially.

The housing is formed so that the shaft hole communicates with the outside and includes a vent hole located between the bushing and the needle bearing, and the distance between the bushing and the needle bearing may be greater than the distance between the needle bearing and the prismatic ring. there is.

In addition, the present invention is a prismatic ring forming step in which both sides are open and one cross section is made of a circular shape and a hollow part is provided therein; mounting the prismatic ring inside the mold so that the hollow part is disposed on the flow path; Forming a housing by injecting a base material into a mold; processing a channel formed inside the housing; and processing a shaft hole formed inside the housing to be orthogonal to the flow path. It provides a valve processing method for a vehicle, characterized in that it comprises a.

The forming of the prismatic ring may include processing a cylindrical portion, processing a flat portion on an outer circumferential surface of the cylindrical portion, and processing an inner jaw on an inner circumferential surface of the cylindrical portion.

The step of mounting the prismatic ring may include combining the prismatic ring so that a jig provided inside the mold supports an inner jaw formed inside the prismatic ring.

The step of processing the channel includes a first cutting step in which any one of roughing, semi-finishing, and finishing, or a plurality of cutting processes is performed on the channel and the hollow, and the first cutting step is to remove the inner jaw through roughing. can

The machining of the shaft hole may include a second cutting step in which any one of roughing, semi-finishing, and finishing, or a plurality of cuttings is performed, and a step of perforating a plane portion of the prismatic ring after the second cutting step.

The machining of the shaft hole may include a third cutting step of machining a periphery of the through hole on an inner circumferential surface of the hollow part after the step of perforating the plane part.

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

First, the opening and closing part can be selectively applied as a one-side or both-side support structure, and in the case of a one-side support structure, assemblyability is increased, and thus manufacturing costs can be reduced,

Second, it is possible to solve problems related to corrosion in the channel by adding a prismatic ring made of different materials using the insert casting method.

Third, by providing a vent hole in the housing, even when condensate is generated, it can be quickly dried or discharged to the outside, thereby minimizing the occurrence of corrosion around the drive unit or opening and closing unit.

Fourth, a flat surface is provided on the outer circumferential surface of the prismatic ring to facilitate processing of a through hole into which a shaft is inserted, and to prevent slip or relative rotation between the housing and the prismatic ring,

Fifth, it is possible to remove burrs generated in the through-hole forming process by processing the peripheral area adjacent to the flow path on the through-hole,

Sixth, since the fasteners for fixing the plate are fixed by adhesive or laser welding, loosening of the fasteners is prevented in advance, thereby improving the defect rate.

1 is a perspective view showing a valve for a vehicle according to a first embodiment of the present invention.
Fig. 2 is a rear view showing the rear surface 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 view illustrating a prismatic ring 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. 3;
10 is a flowchart showing a method of manufacturing a valve for a vehicle according to an embodiment of the present invention.
FIG. 11 is a reference view showing a prismatic ring in manufacturing order according to the manufacturing method of the valve for a vehicle shown in FIG. 10 .
12 is a longitudinal sectional view showing a cross section of a valve for a vehicle according to a second embodiment of the present invention.
Fig. 13 is a longitudinal sectional view showing a section of the housing shown in Fig. 12;

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

1 to 3 , the vehicle valve 100 according to the first embodiment of the present invention includes a housing 110, a driving unit 120, an opening/closing unit 130, and a prismatic ring 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 prismatic ring 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, the housing 110 is formed with a shaft hole 112 in which the shaft 131 is installed. 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

Also, the opening/closing part 130 includes a shaft 131 and a plate 132 .

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 . Further, the other end of the shaft 131 is inserted into the opposite housing through the passage 111 to provide support structures on both sides. At this time, the shaft hole 112 is formed to extend inside the housing on the opposite side, and a bushing 135f supporting the other end of the shaft 131 and a cap 135g covering the end of the shaft hole 112 are provided. The support structure on both sides can support the rigid rotation of the shaft 131, so it is suitable for a structure requiring precise control.

In addition, while the prismatic ring 140 is inserted and fixed inside the passage 111, the housing 110 is molded using an insert casting method, and one passage 111 may be formed with two configurations of different materials. At this time, a through hole 141 is formed in the prismatic ring 140 so that the shaft 131 can extend in the direction of the flow path 111 . For example, the housing 110 may be made of aluminum, which is easy to process and light, and the prismatic ring 140 may be made of stainless steel 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 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 includes an upper shaft hole 112a and a lower shaft hole 112b. A first step 115a is provided in the upper shaft hole 112a so that a retaining washer 135e coupled to the outer circumferential surface of the shaft 131 can be supported, and a seal member 135c is attached to the shaft 131 A second step 115b may be provided adjacent to a region coupled to the shaft 131 and the shaft hole 112 so that only a minimum assembly tolerance is formed.

The housing 110 may include a vent hole 115c formed to communicate with the outside. 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 on a sidewall of the housing 110 adjacent to the driving unit 120 . Accordingly, the vent hole 115c may discharge heat generated around the driving unit to the outside.

As shown in FIG. 6 , the plate 132 includes a valve ring 136 that contacts the inner circumferential surface of the prismatic ring 140 . The valve ring 136 may improve shielding performance while reducing direct friction between the plate and the prismatic ring 140 . The valve ring 136 may be implemented with a material having elasticity and less hardness than the material of the prismatic ring 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 prismatic ring 140 repeatedly come into contact. At this time, the valve ring 136 or the plate ( 132) and the inner circumferential surface of the prismatic ring 140, moisture and foreign matter contained in the air may partially accumulate. When moisture and foreign substances are gradually deposited, corrosion occurs between the prismatic ring 140 and the valve ring 136. Since the valve ring 136 is in continuous contact with the inner circumferential surface of the prismatic ring 140, the possibility of corrosion Corrosion may occur on the inner circumferential surface of the low, typically prismatic ring 140.

As a countermeasure to prevent this problem, a prismatic ring 140 made of corrosion-resistant stainless steel is mounted 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 view illustrating a prismatic ring of the valve for a vehicle shown in FIG. 3 .

Referring to FIG. 8 , the prismatic ring 140 includes a cylindrical portion 142 made of stainless steel and a through hole 141 through which a shaft 131 is inserted through 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 through hole 141 may have a size corresponding to the inner diameter of the shaft hole 112 . The through hole 141 is disposed on at least one side of the cylindrical portion 142 and is preferably formed to pass through a 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. A detailed processing method of the cylindrical portion 142 will be described later.

The cylindrical portion 142 is provided with a flat portion 147 on an outer circumferential surface, and an inner chin (see FIG. 11 , 148 ) is provided on an inner circumferential surface of the first region 144 .

The flat portion 147 may be formed by being cut into a curved surface or flat surface different from the curvature of the outer circumferential surface. In this embodiment, a shape in which the plane portion 147 is cut into a plane having a predetermined width will be described as an example.

The plane portion 147 may form a section where the prismatic ring 140 having a circular cross section contacts the housing 110 in a plane-to-plane plane during the insert casting process. That is, when the housing 110 and the prismatic ring 140 come into contact only with a curved surface having a constant curvature, slip may occur between them or rotation relative to a predetermined angle may occur. can

In addition, at least one flat portion 147 is disposed to correspond to the position of the shaft hole 112 . Therefore, when the through hole 141 is post-processed on the cylindrical portion 142 to correspond to the shaft hole 112, a cutting tool is inserted into the shaft hole 112 and cut while contacting the flat portion 147. This accompanies the advantage of being able to set a stable punching position because the tool contacts the flat part 147 compared to cutting by contacting the curved surface on the outer circumferential surface of the cylindrical part 142 . Of course, the flat part 147 is formed along the width direction of the cylindrical part 142, and a plurality of them are arranged at equal intervals along the circumferential direction of the cylindrical part 142, and the shaft is located on the opposite side of the housing with the channel 111 as the center. Another flat part may be arranged to correspond to the position where the hole 112 is formed. Therefore, it is preferable that two planar parts 147 are provided corresponding to the position of the shaft hole 112 on the outer circumferential surface of the cylindrical part 142, or a total of four planar parts are provided at equal intervals along with this.

In the process of insert casting the prismatic ring 140 and the housing 110, the inner jaw 148 can be gripped by a jig (not shown) when the prismatic ring 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 prismatic ring 140 can be mounted in the flow path 111 region, and the housing 110 can be installed while the prismatic ring 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 prismatic ring 140 in the process of closing the opening and 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. 3;

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 prismatic ring 140 on the passage 111 is omitted.

Referring to FIGS. 8 and 9 , in the housing 110 , a planar support portion 117 made of a flat surface protrudes to face the flat portion 147 on the flow path 111 .

That is, the flat part support part 117 can prevent the rotation of the prismatic ring 140 by contacting and supporting the flat part 147 while the base material faces the flat part 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. A detailed processing method according to this will be described later.

10 is a flow chart showing a method for manufacturing a valve for a vehicle according to an embodiment of the present invention, and FIG. 11 is a reference diagram showing a manufacturing order of a prismatic ring according to the method for manufacturing a valve for a vehicle shown in FIG. 10 . The same reference numerals as those mentioned below denote the same components.

The method for manufacturing a valve for a vehicle according to an embodiment of the present invention (S100) includes a prismatic ring forming step (S110), a prismatic ring mounting step (S120), a housing forming step (S130), a passage processing step (S140) and a shaft A hole processing step (S150) is included. Here, the method of manufacturing a valve for a vehicle (S100) will be described as an example of being made of an insert casting method, and may be implemented in other ways.

First, the prismatic ring forming step (S110) includes processing a cylindrical portion with openings on both sides (S111), processing a flat portion on the outer circumferential surface of the cylindrical portion (S112), and processing an inner jaw (S113).

In the step of processing the cylindrical portion (S111), the 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 flat part processing step (S112), a plurality of flat parts are cut on the outer circumferential surface of the cylindrical part. It is preferable that the flat part is processed within the range of not exceeding 50% of the thickness of the cylindrical part. At least one pair of planar parts are disposed to face each other around the hollow part, and in this embodiment, two pairs of flat part parts are disposed at an equal angle to each other 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 an equal angle in the third area (see FIG. 8, 144).

In the prismatic ring mounting step (S120), the prismatic ring is mounted to correspond to the position where the flow path is to be formed inside the mold. At this time, although not shown in the drawings, a jig for supporting a plurality of inner jaws is disposed inside the mold, and a prismatic ring is mounted on the jig to correspond to a region where a channel of the housing is to be formed.

In the housing molding step (S130), the housing is molded by injecting the molten base material into an area outside the prismatic ring inside the mold. When the injected base material is cooled, a housing with an external shape is completed. At this time, as shown in FIG. 11 (a), an unfinished channel and a shaft hole are formed in the housing. In addition, the hollow part of the prismatic ring is exposed inside the passage. 11(a) shows a state in which the jig supporting the prismatic ring is removed.

Next, processing of the channel and the shaft hole of the housing is performed.

The channel processing step (S140) includes a first cutting step (S141) and a finishing step (S142). As shown in FIG. 11(b), in the first cutting step (S141), the inner diameter of the hollow part is increased by rough machining the inner circumferential surface of the cylindrical part. At this time, the inner diameter of the hollow part and the inner diameter of the channel are cut almost similarly. The first cutting step (S141) includes at least one cutting process among roughing, semi-finishing, and finishing.

The finishing step (S142) may be performed in the process of finishing cutting the hollow part of the passage or the prismatic ring immediately before the machining of the passage and the shaft hole is completed.

At this time, the inner jaw may be deleted in the first cutting step (S141). That is, while increasing the inner diameter of the cylindrical portion, it may be processed similarly to the inner diameter of the passage, but the inner jaw may be removed.

The shaft hole processing step (S150) includes a second cutting step (S151), a flat part perforation step (S152), and a third cutting step (S153).

As shown in FIG. 11(c), in the second cutting step (S151), at least one cutting process among roughing, semi-finishing, and finishing is performed on the inside of the shaft hole. For example, in the second cutting step ( S151 ), first roughing, second semi-finishing, and third finishing may be performed.

The flat part punching step (S152) may be performed simultaneously in the second cutting step (S151), and only the flat part punching may be performed separately. In the flat part punching step (S152), a through hole is formed on the cylindrical part by inserting a tool into the shaft hole. At this time, in the process of processing the through hole, a predetermined burr may be generated inside the hollow part.

As shown in FIG. 11(d), the third cutting step (S153) includes a first chamfering step (S154) of processing a step on the inner circumferential surface of the shaft hole.

In the first chamfering step (S154), the position where the needle bearing, seal member or retaining washer is to be installed is chamfered. Of course, the first chamfering step (S154) may additionally chamfer the end of the through hole disposed inside the shaft hole.

In addition, the third cutting step (S153) includes a second chamfering step of processing around the through hole on the inner circumferential surface of the hollow part after the flat part punching step (S152). As shown in FIG. 11(e), in the second chamfering step (S155), chamfering is performed around the perforated hole inside the hollow part, and at this time, the burrs generated in the flat part perforation step (S152) are removed to make the inner circumferential surface of the cylindrical part processed neatly.

When the third cutting step (S153) is completed, a step (S142) of finishing the hollow part is performed, as shown in FIG. 11(f). At this time, through the finishing step (S142) of the hollow part, foreign substances generated in the third cutting step (S153) are all removed, and the inner diameter of the hollow part and the passage can be matched.

12 is a longitudinal sectional view showing a cross section of a vehicle valve according to a second embodiment of the present invention, and FIG. 13 is a longitudinal sectional view showing a cross section of the housing shown in FIG. 12 . The same reference numerals as those mentioned below denote the same components.

The vehicle valve 200 according to the second embodiment of the present invention provides a one-side support structure in which the other end of the shaft 131 is exposed on the flow path 111 and is not supported by the housing 210.

Unlike the first embodiment, the support structure on one side of the shaft 131 in which the lower shaft hole is not formed at the bottom of the flow path 111 of the housing 210 is easy to assemble and has an effect of reducing manufacturing cost. Therefore, depending on the case, it is possible to selectively apply the support structure on one side and the support structure on both sides.

Inside the shaft hole 112, a bushing 135a supporting the outer circumferential surface of the shaft, a needle bearing 135b, a retaining washer 135e, and a seal member 135c are sequentially disposed toward the flow path. And, inside the shaft hole 112, the needle bearing 135b is disposed adjacent to the prismatic ring 240. That is, the distance between the needle bearing 135b and the bushing 135a is greater than the distance (interval) between the needle bearing 135b and the prismatic ring 240. Therefore, while the needle bearing 135b is disposed adjacent to the prismatic ring 240, it is possible to stably support the rotation of the shaft 131 even through the one-sided support structure.

Here, in the case of the one-sided support structure, the vent hole 215c is disposed to communicate with the shaft hole 112 . In addition, the prismatic ring 240 is coupled so that the shaft 131 is inserted while a through hole is formed only in the upper region.

Since the structures of the remaining housing 110, the drive unit 120, and the opening/closing unit are the same as those of the vehicle valve of the first embodiment described above, redundant description will be omitted.

Therefore, according to the vehicle valve according to the embodiment of the present invention, the opening and closing part can be selectively applied to one side or both sides of the support structure, and in the case of the one side support structure, assemblability is increased, and accordingly, manufacturing cost can be reduced, Corrosion-related problems in the flow path can be solved by adding a prismatic ring made of different materials using the insert casting method, and even when condensate is generated by providing a vent hole in the housing, it can be quickly dried or discharged to the outside, so that the drive unit or opening/closing unit It is possible to minimize the occurrence of corrosion in the surroundings, and to have a flat surface on the outer circumferential surface of the prismatic ring to facilitate processing of the through hole into which the shaft is inserted, and to prevent slip or relative rotation between the housing and the prismatic ring. By processing the peripheral area adjacent to the flow path on the through hole, it is possible to remove the burr generated during the through hole forming process, and since the fastener fixing the plate is fixed with an adhesive or laser welding, loosening of the fastener can be prevented in advance. By preventing this, there is an effect of 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, 200: vehicle valve
110, 210: housing
120: driving unit
130: opening and closing part
140, 240: square ring

Claims (15)

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 prismatic ring disposed around the plate inside the passage, contacting the plate when the opening/closing part is closed, and having at least one flat part on an outer circumferential surface; including,
The prismatic ring includes a cylindrical portion in which a hollow portion is provided therein to correspond to the flow path, and a through hole through which an area corresponding to the shaft hole passes through the cylindrical portion, and the flat portion is arranged to correspond to the position of the shaft hole A valve for a vehicle, characterized in that being. delete delete The method of claim 1,
The cylindrical part,
Including an inner jaw cut inward on the inner circumferential surface,
After the molding of the housing is completed, the valve for a vehicle, characterized in that the inner jaw is removed while cutting the passage and the hollow part. The method of claim 1,
The flat part,
A vehicle valve, characterized in that formed along the width direction of the cylindrical portion, and a plurality of valves arranged at equal intervals from each other along the circumferential direction of the cylindrical portion. The method of claim 1,
In the case of the housing on both sides of the support structure,
Including an upper shaft hole and a lower shaft hole disposed to face each other with the flow path as the center,
The upper shaft hole is sequentially provided with a needle bearing coupled to an outer circumferential surface of the shaft, a retaining washer disposed below the needle bearing, and a seal member for shielding between the upper shaft hole and the flow path,
A valve for a vehicle, characterized in that the lower shaft hole is provided with a bushing supporting an end of the shaft and a cap covering an end of the lower shaft hole. The method of claim 6,
the housing,
A valve for a vehicle, characterized in that a side surface adjacent to the drive unit includes a vent hole formed to communicate with the outside. The method of claim 1,
In the case of the housing having a one-sided support structure,
The shaft hole is sequentially provided with a bushing coupled to an outer circumferential surface of the shaft, a needle bearing, a retaining washer disposed below the needle bearing, and a seal member for shielding between the upper shaft hole and the flow path. Characterized in that valves for vehicles. The method of claim 8,
the housing,
The shaft hole is formed to communicate with the outside and includes a vent hole located between the bushing and the needle bearing,
A vehicle valve, characterized in that the distance between the bushing and the needle bearing is greater than the distance between the needle bearing and the prismatic ring. A prismatic ring forming step in which both sides are open and one cross section is made of a circular shape and a hollow part is provided therein;
mounting the prismatic ring inside the mold so that the hollow part is disposed on the flow path;
Forming a housing by injecting a base material into a mold;
processing a channel formed inside the housing; and
processing a shaft hole formed inside the housing to be orthogonal to the flow path; including,
The forming of the prismatic ring includes processing a cylindrical portion, processing a flat portion on an outer circumferential surface of the cylindrical portion, and processing an inner jaw on an inner circumferential surface of the cylindrical portion, wherein the flat portion is formed in a shaft hole. Valve processing method for a vehicle, characterized in that arranged to correspond. delete The method of claim 10,
The step of mounting the prismatic ring,
and coupling the prismatic ring to a jig provided inside the mold to support an inner jaw formed inside the prismatic ring. The method of claim 10,
Processing the flow path,
And a first cutting step in which any one or a plurality of cutting processes of roughing, semi-finishing, and finishing are performed on the passage and the hollow part,
The first cutting step is a method for processing a valve for a vehicle, characterized in that the inner jaw is deleted through roughing. The method of claim 10,
The step of machining the shaft hole,
A second cutting step in which any one or a plurality of cutting processes are performed among roughing, semi-finishing, and finishing;
A method for processing a valve for a vehicle, characterized in that it comprises the step of perforating the plane portion of the prismatic ring after the second cutting step. The method of claim 14,
The step of machining the shaft hole,
After the step of perforating the flat part, the valve processing method for a vehicle comprising a third cutting step of processing a periphery of the through hole on the inner circumferential surface of the hollow part.

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