KR102185007B1 - Housing of electronic throttle valve and manufacturing method thereof - Google Patents

Abstract

Disclosed is a housing of an electronic throttle valve, which includes: a bore that is made of a first material, and has an air flow passage in which air flows and a rotating shaft in which a shaft integrally coupled to a valve body positioned inside the air flow passage is rotated; and an injection body that is made of a second material which is a resin material while the bore is inserted therein, and covers the outer surface of the bore, wherein the bore is formed with an extension unit extended from the outer surface to the outside or extended from the inner surface toward the air flow passage, and extended in the direction of a plane intersecting the air flow passage.

Description

Housing of electronic throttle valve and its manufacturing method {HOUSING OF ELECTRONIC THROTTLE VALVE AND MANUFACTURING METHOD THEREOF}

The present invention relates to a housing of an electronic throttle control valve (ETC), and relates to a structure of a housing for preventing deformation of an electronic throttle valve including a housing injection-molded of resin and a method of manufacturing the same.

Combustion engines such as vehicles must be supplied with an appropriate amount of air at the same time as fuel is injected. The electronic throttle valve mounted on the vehicle adjusts the amount of air supplied to the engine as the opening and closing amount is controlled.

In particular, the electronic throttle valve is installed in the intake pipe, and the opening and closing of the electronic throttle valve is controlled as the motor is driven according to an electric signal generated in proportion to the driver's accelerator pedal depression amount.

The conventional electronic throttle valve has a problem in that the throttle housing and gear housing coupled to the engine are molded into a die-casting cast product, so that the manufacturing cost increases as the load increases.

Accordingly, in order to reduce cost and weight, the electronic throttle valve employs a method of injection molding a housing with plastic. However, plastics are vulnerable to heat or moisture, so there is a problem of poor dimensional stability.

In order to solve this problem, the air flow part or the gear fixing part used a technology of injecting with two kinds of materials using a material that is relatively less deformed by heat or moisture, but the housing of the electronic throttle valve according to the prior art There is a problem that thermal deformation occurs in the inserted air flow portion during injection.

The matters described as the background art are only for enhancing an understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the prior art already known to those of ordinary skill in the art.

KR 10-2003-0046488 A

The present invention has been proposed to solve this problem, and is to provide a structure and a manufacturing method for improving dimensional stability in a housing of an injection-molded electronic throttle valve.

The housing of the electronic throttle valve according to the present invention for achieving the above object is made of a first material, and an air flow path through which air flows is formed, and integrally with the valve body located inside the air flow path. A bore having a rotation shaft through which the combined shaft is rotated; And an injection body that is made of a resin material with a second material that is a resin material with the bore inserted therein, and covers the outer surface of the bore; and the bore extends from the outer surface to the outside or from the inner surface toward the air flow passage And, an extension portion extending in a plane direction crossing the air flow path is formed.

The first material is a material that is relatively less deformed by heat or moisture than the second material, and the bore may be made of the first material at the same time as the extension part.

The injection body has a plurality of coupling holes positioned outside the bore and extending in a direction parallel to the air flow path, and the extension portion may extend from the outer surface of the bore toward the plurality of coupling holes.

The bore partially surrounds the outer side of the shaft and extends in the direction in which the shaft extends to form a rotational shaft of the shaft, and a plurality of coupling holes formed in the injection body may be spaced apart from the rotational shaft of the shaft in the radial direction of the air flow path. .

In the bore, a mounting hole communicating with a part or all of the plurality of coupling holes, respectively, is formed, and the extension part may extend in a direction parallel to the air flow passage while surrounding the mounting hole.

The extension part may extend outward from the outer surface of the bore, and may extend in a plane direction intersecting the air flow passage while including the rotation center of the shaft.

The extension part may extend outward from the center of the bore along the direction in which the air flow path extends.

The extension portion may be connected to be curved or tapered between the outer surface of the bore.

It may further include a mounting portion connected to the bore at a position spaced laterally from the air flow path and extending in a plane direction crossing the direction in which the axis of rotation in which the shaft is rotated is extended.

The mounting portion is connected to the bore through the extension portion, and may be manufactured integrally with the bore from a first material.

The extension portion extends so that both ends thereof are connected to the inner surface of the bore inside the air flow passage, so that the bore can be supported from the inside.

The extension portion may extend toward the air flow path at a position spaced apart from the contact area of the bore contacting the valve body when rotating while the shaft integrally coupled with the valve body is inserted into the bore.

In order to achieve the above object, a method of manufacturing a housing of an electronic throttle valve according to the present invention comprises: injection molding a bore into a first material to form an extension; Injection-molding the injection body with a second material while inserting the injection-molded bore therein; And forming or inserting the shaft into the rotating shaft formed in the bore.

The extension portion extends from the inner side of the bore toward the air flow passage, and after the step of injection-molding the injection body with the second material, removing the extension from the inner side of the bore; may further include.

According to the housing of the electronic throttle valve of the present invention, it has the effect of reducing the weight and cost of the housing while minimizing deformation due to heat or moisture.

In addition, it has an effect of improving the control precision of the air flow rate by preventing the dimensional deformation of the air flow portion.

1 is a perspective view of a housing of an electronic throttle valve according to an embodiment of the present invention.
2 shows a bore and a mounting part according to an embodiment of the present invention.
Figure 3 shows a bore and an injection body in an embodiment of the present invention.
4 is an enlarged view of an extension according to an embodiment of the present invention.
5 to 6 illustrate extensions according to various embodiments of the present invention.
7 shows an extension formed on the inner side of the bore according to an embodiment of the present invention.
8 is a flowchart illustrating a method of manufacturing a housing of an electronic throttle valve according to an embodiment of the present invention.

Specific structural or functional descriptions of the embodiments of the present invention disclosed in this specification or application are exemplified only for the purpose of describing the embodiments according to the present invention, and the embodiments according to the present invention may be implemented in various forms. And should not be construed as limited to the embodiments described in this specification or application.

Since the embodiments according to the present invention can be modified in various ways and have various forms, specific embodiments are illustrated in the drawings and will be described in detail in the present specification or application. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the present invention are included.

Terms such as first and/or second may be used to describe various components, but the components should not be limited by the terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of the rights according to the concept of the present invention, the first component may be named as the second component, and similarly The second component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle. Other expressions describing the relationship between components, such as "between" and "just between" or "adjacent to" and "directly adjacent to" should be interpreted as well.

The terms used in this specification are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of a set feature, number, step, action, component, part, or combination thereof, but one or more other features or numbers It is to be understood that the presence or additional possibilities of, steps, actions, components, parts, or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present specification. .

Hereinafter, the present invention will be described in detail by describing a preferred embodiment of the present invention with reference to the accompanying drawings. The same reference numerals in each drawing indicate the same member.

1 is a perspective view of a housing of an electronic throttle valve according to an embodiment of the present invention, and FIG. 2 is a view showing a bore 100 and a mounting part 300 according to an embodiment of the present invention. 3 shows the bore 100 and the injection body 200 according to an embodiment of the present invention.

1 to 3, the housing of the electronic throttle valve is made of a first material, an air flow passage 120 through which air flows is formed, and a valve body positioned inside the air flow passage 120 A bore 100 having a rotation shaft 130 through which a shaft (not shown) integrally coupled with (not shown) is rotated; And a second material made of a resin material with the bore 100 inserted therein, and the injection body 200 surrounding the outer surface of the bore 100; including, and the bore 100 has An extension portion 110 is formed that extends to or extends from the inner surface toward the air flow path 120 and extends in a plane direction crossing the air flow path 120.

Here, the electronic throttle control valve (ETC) may be connected to an intake manifold that supplies air to an internal combustion engine such as an engine or to a fuel cell stack. The electronic throttle valve can adjust the amount of air supplied to the intake manifold by controlling the opening and closing.

The bore 100 may have an air flow passage 120 through which air flows. The air flow passage 120 may have a circular cross section in an embodiment. The air flow passage 120 may be connected to an intake pipe connected to the engine of the vehicle. That is, the bore 100 may have a shape of a tube through which air flows through, and may have a shape surrounding the air flow passage 120.

The bore 100 may be formed of a first material. As described later, the first material may be a resin material or a metal material such as aluminum. The first material may be a material having relatively less dimensional deformation due to heat or moisture than the second material.

The bore 100 may be formed with an extension portion 110 extending in a plane direction crossing the air flow passage 120. The extension part 110 extends in a plane direction intersecting with the air flow passage 120 on the outer or inner surface, thereby supporting the air flow passage 120 so that the cross-section of the air flow passage 120 is not deformed.

In particular, the extension part 110 may be reinforced so that the cross section of the air flow passage 120 is not deformed by extending from the outer surface of the bore 100 to the inside of the injection body 200 as described later, and the bore 100 ) From the inner side of the air flow passage 120 may be extended to directly support the air flow passage 120.

The injection body 200 may be formed by injection of a resin material with the bore 100 inserted therein. In particular, the injection body 200 may be formed of a second material different from the bore 100. Although the second material is relatively poor in dimensional stability, it may be a thermoplastic resin having a light weight and a low unit cost.

Accordingly, the housing of the electronic throttle valve has an effect of preventing deformation of the air flow passage 120 even if the injection body 200 is injection-molded with the bore 100 inserted therein.

Specifically, the first material is a material that is relatively less deformed by heat or moisture than the second material, and the bore 100 may be made of the first material at the same time as the extension part 110.

The bore 100 may be injection-molded integrally with the extension 110. The bore 100 is configured to support the air flow passage 120 and may be made of a first material, which is a resin having relatively little deformation due to heat or moisture. For example, the first material may be a thermosetting plastic.

The injection body 200 has a plurality of coupling holes 210 located outside the bore 100 and extending in a direction parallel to the air flow passage 120, and the extension 110 is formed outside the bore 100. It may extend from the side to the plurality of coupling holes 210.

The plurality of coupling holes 210 formed in the injection body 200 may be disposed in a circumferential direction from the outside of the air flow passage 120 with the air flow passage 120 as the center. As shown, the plurality of coupling holes 210 may be disposed at the same angular interval around the air flow passage 120.

The plurality of coupling holes 210 may be configured to be coupled to an external configuration. For example, the mounting bolt may be coupled to the external configuration while passing through the coupling hole 210, and accordingly, the electronic throttle valve may be fixed.

Specifically, the bore 100 partially surrounds the outside of the shaft (not shown) and extends in the direction in which the shaft (not shown) extends to form the rotation shaft 130 of the shaft (not shown), and the injection body 200 The plurality of coupling holes 210 formed in may be spaced apart from the rotation shaft 130 through which the shaft (not shown) is rotated in the radial direction of the air flow passage 120.

A shaft (not shown) may be rotatably coupled to the bore 100, and a rotation shaft 130 into which a shaft (not shown) is inserted may be formed. In particular, a shaft (not shown) penetrating the air flow passage 120 of the bore 100 may partially protrude to the outside of the bore 100, and the bore 100 is of a shaft (not shown) protruding outward. A shaft (not shown) may extend in an extended direction to surround a portion.

The plurality of coupling holes 210 may be disposed to be spaced apart from the rotation shaft 130 of the shaft (not shown) in the radial direction. Specifically, the rotation shaft 130 of the shaft (not shown) may be positioned between the plurality of coupling holes 210 spaced radially around the air flow passage 120.

Accordingly, the housing of the electronic throttle valve may be stably supported by the external configuration, and the shaft (not shown) may be supported by the injection body 200 without interfering with the plurality of coupling holes 210.

The extension part 110 extends toward the plurality of coupling holes 210 so as to be adjacent to the plurality of coupling holes 210, but may be avoided so as not to overlap the plurality of coupling holes 210. In one embodiment, the extension part 110 may extend to surround the plurality of coupling holes 210.

4 is an enlarged view of the extension part 110 according to an embodiment of the present invention.

4, the extension part 110 extends outward from the outer surface of the bore 100, and extends in a plane direction intersecting the air flow passage 120 while including the rotation center of the shaft (not shown). Can be.

Specifically, the rotation shaft 130 may be formed in the bore 100 so that the rotation center of the shaft (not shown) passes through the center of the bore 100, and the extension portion 110 is the rotation center of the shaft (not shown). It may extend in parallel with the rotation axis 130 of the bore 100 in the included plane direction.

That is, the extension part 110 may extend outward from the center of the bore 100 along the direction in which the air flow passage 120 extends. The bore 100 surrounding the air flow passage 120 may extend outward from the center along the extension direction of the air flow passage 120.

Therefore, the extension part 110 extends from the center of the bore 100 surrounding the air flow path 120 and has an effect of supporting the bore 100 so that the air flow path 120 is not deformed in the radial direction of the cross section. .

The extension part 110 may be connected to be curved or tapered between the outer surface of the bore 100. Specifically, the extension part 110 may be gradually extended from the outer surface of the bore 100 to form a curved surface or may be connected to be tapered between the outer surface of the bore 100. That is, between the outer surface of the bore 100 and the extension portion 110 may be rounded or chamfered with a specific radius.

Since the injection body 200 is injected while the bore 100 in which the extension part 110 is formed is inserted, the injection product of the second material can be easily flowed. The extension part 110 may extend while forming a curved surface to have a continuous curvature on the outer surface of the bore 100 or may be tapered.

The extension part 110 may be connected to the outer surface of the bore 100 so that the upper end and the lower end according to the direction in which the air flow passage 120 extends form an outer surface and a curved surface of the bore 100.

5 to 6 illustrate an extension part 110 according to various embodiments of the present invention.

5 to 6, the extension part 110 according to another embodiment of the present invention, as shown in FIG. 5, extends from the outer surface of the bore 100, but is connected to the mounting part 300 to be described later. May not be.

That is, the mounting portion 300 is separated and formed separately, and the extension portion 110 may be formed only outside the air flow passage 120.

As shown in Fig. 6, the extension part 110 according to another embodiment of the present invention has a mounting hole 140 in the bore 100 that communicates with some or all of the plurality of coupling holes 210, respectively. And, the extension part 110 may extend in a direction parallel to the air flow passage 120 while surrounding the mounting hole 140.

The mounting hole 140 may be formed in the bore 100 so as to communicate with the coupling hole 210. The extension part 110 may extend in a direction parallel to the air flow passage 120 while surrounding the mounting hole 140 to form a coupling hole 210.

Accordingly, since the extension part 110 forms a mounting hole made of the first material, the coupling hole 210 has an effect of minimizing deformation due to heat or moisture.

As shown in FIG. 2, the plane direction intersecting the direction in which the rotation shaft 130 in which the shaft (not shown) is rotated is connected to the bore 100 at a position spaced laterally from the air flow passage 120 It may further include a; mounting portion 300 extended to.

The mounting part 300 may have a shape extending in a plane to include a mounting point. In particular, a driving device (for example, a motor), a shaft (not shown), or a transmission device may be mounted at a mounting point of the mounting unit 300. The transmission device may be a gear that transmits a driving force of a driving device and a rotation shaft 130 of the gear.

Specifically, the mounting part 300 is connected to the bore 100 through the extension part 110 and may be manufactured integrally with the bore 100 as a first material.

As the valve body (not shown) rotates in the bore 100 together with the shaft (not shown), it is possible to control the amount of air flowing into the air flow passage 120. The distance and perpendicularity between the rotation shaft 130 between the driving device, the shaft (not shown) and the transmission device must be maintained with respect to the mounting part 300, so the mounting part 300 has relatively little deformation due to heat or moisture. It can be made of the first material.

One end of the shaft (not shown) is mounted on the mounting portion 300 and penetrates the mounting portion 300 to be exposed to the outside, and a gear may be coupled to one end of the shaft (not shown). The driving device may be mounted on the mounting unit 300 and may be connected to a gear coupled to one end of a shaft (not shown) to transmit a driving force.

The mounting part 300 may be formed integrally with the bore 100 with the extension part 110 extended. The extension part 110 extends while surrounding any one of a plurality of through holes or mounting holes 140, and may be connected to the mounting part 300 extending in a plane direction perpendicular to the direction in which the shaft (not shown) is extended. have.

7 shows an extension 110 formed on the inner surface of the bore 100 according to an embodiment of the present invention.

With further reference to FIG. 7, the extension part 110 extends so that both ends thereof are connected to the inner surface of the bore 100 from the inside of the air flow passage 120 to support the bore 100 from the inside. Specifically, the extension portion 110 may be formed to extend into the air flow passage 120 from the inner surface of the bore 100.

In one embodiment, the extension part 110 may extend in a plane direction intersecting the direction in which the air flow path 120 extends in the air flow path 120. The extension portion 110 may be a flat surface or a plurality of straight lines connected to the inner side of the bore 100 at both ends.

Both ends of the extension portion 110 connected to the inner surface of the bore 100 may be formed to have a relatively thin thickness. Alternatively, cutting lines depressed inward may be formed at both ends of the extension part 110 so as to induce cutting with the inner surface of the bore 100 when pressed. Accordingly, the extension part 110 may be easily cut from the inner surface of the bore 100.

In particular, the extension 110 may have a linear shape extending in a radial direction from the center of the air flow passage 120, and may be a plurality of straight lines intersecting each other.

The extension portion 110 formed on the inner surface of the air flow passage 120 may be removed by a separate process after the insert injection of the injection body 200 is completed. Accordingly, the flow rate or flow of air flowing into the air flow passage 120 may not be disturbed.

In one embodiment, the extension part 110 is a bore that contacts the valve body (not shown) when rotating in a state in which a shaft (not shown) integrally coupled with the valve body (not shown) is inserted into the bore 100 ( It may extend toward the air flow path 120 at a position spaced apart from the contact area of 100).

The shaft (not shown) may be manufactured by a separate process and inserted into the rotation shaft 130 formed in the bore 100 or may be injected from the inside of the bore 100. The valve body (not shown) is also inserted into the bore 100 while being coupled to a shaft (not shown), or is coupled to a shaft (not shown) inserted into the bore 100 by a separate process, or It may be injected into the shaft (not shown) inserted in the 100.

The valve body (not shown) may block or open the air flow passage 120 by rotating simultaneously with the shaft (not shown) in the bore 100. When the air flow passage 120 is opened, the valve body (not shown) may contact the inner surface of the bore 100 in the contact area of the bore 100.

The extension part 110 may extend toward the air flow path 120 at a position spaced apart from the contact area of the bore 100 in contact with the valve body (not shown). The contact area of the bore 100 may be a predetermined area in the front-rear direction along the extension direction of the air flow passage 120 based on a position where the valve body (not shown) closes the air flow passage 120.

That is, the extension part 110 is formed to be spaced apart from the rotation center of the shaft (not shown) in the extension direction of the air flow path 120 so that the front end portion according to the extension direction of the air flow path 120 of the bore 100 or It can be formed at the rear end.

Accordingly, interference of the extension part 110 with the valve body (not shown) in the air flow passage 120 may be minimized, and the precision of air flow control may be improved.

In particular, even if the extension portion 110 is cut and removed after injection molding of the injection body 200, the valve body (not shown) may be prevented from interfering with the cut surface generated on the inner surface of the bore 100.

8 is a flowchart illustrating a method of manufacturing a housing of an electronic throttle valve according to an embodiment of the present invention.

Referring further to FIG. 8, as a method of manufacturing a housing of an electronic throttle valve, the method comprising: injection molding the bore 100 from a first material to form an extension portion 110 (S100); Injection-molding the injection body 200 into a second material with the injection-molded bore 100 inserted therein (S200); And forming or inserting a shaft (not shown) into the rotation shaft 130 formed in the bore 100 (S400).

When the extension part 110 extends from the inner surface of the bore 100 toward the air flow passage 120, after the step of injection molding the injection body 200 with a second material (S200), the bore 100 The step of removing the extension part 110 from the inner surface (S300); may further include.

In the step S300 of removing the extension part 110 from the inner surface of the bore 100, the extension part 110 may be cut from the inner surface of the bore 100. In one embodiment, the extension part 110 may be cut by a cutter or the like, or the extension part 110 may be cut by a blanking method using a punch.

Although illustrated and described in connection with specific embodiments of the present invention, it is understood in the art that the present invention can be variously improved and changed within the scope of the technical spirit of the present invention provided by the following claims. It will be obvious to a person of ordinary knowledge.

100: bore 110: extension
200: injection body 300: mounting part

Claims (14)

A bore made of a first material and formed with an air flow passage through which air flows, and a rotation shaft through which a shaft integrally coupled with a valve body positioned inside the air flow passage is formed; And
Including; an injection body that is made of a second material, which is a resin material, with the bore inserted therein, and surrounds the outer surface of the bore,
The housing of the electronic throttle valve, characterized in that the bore is formed with an extension portion extending from the inner surface toward the air flow path and extending in a plane direction crossing the air flow path. The method according to claim 1,
The first material is a material that is relatively less deformed by heat or moisture than the second material,
The housing of the electronic throttle valve, characterized in that the bore is made of a first material at the same time as the extension part. The method according to claim 1,
The injection body has a plurality of coupling holes located on the outside of the bore and extending in a direction parallel to the air flow passage,
The housing of the electronic throttle valve, characterized in that the bore extends from the outer surface toward the plurality of coupling holes. The method of claim 3,
The bore partially surrounds the outside of the shaft and extends in the direction in which the shaft extends to form the axis of rotation of the shaft,
A housing of an electronic throttle valve, characterized in that the plurality of coupling holes formed in the injection body are spaced apart from the rotation shaft in which the shaft is rotated in the radial direction of the air flow passage. The method of claim 3,
Mounting holes are formed in the bore to communicate with a part or all of the plurality of coupling holes, respectively,
The housing of the electronic throttle valve, characterized in that the bore extends in a direction parallel to the air flow passage while surrounding the mounting hole. delete delete delete The method according to claim 1,
The housing of the electronic throttle valve further comprising a; a mounting portion connected to the bore at a position spaced laterally from the air flow passage and extending in a plane direction crossing the direction in which the axis of rotation in which the shaft is rotated. The method of claim 9,
The housing of the electronic throttle valve, characterized in that the mounting portion is connected to the bore and is made of a first material integrally with the bore. The method according to claim 1,
The housing of the electronic throttle valve, characterized in that the extension part extends so that both ends are connected to the inner surface of the bore from the inside of the air flow passage to support the bore from the inside. The method of claim 11,
The housing of an electronic throttle valve, characterized in that the extension part extends toward the air flow path at a position spaced apart from the contact area of the bore contacting the valve body when rotating while the shaft integrally coupled with the valve body is inserted into the bore. As a method of manufacturing the housing of the electronic throttle valve of claim 1,
Injection molding the bore from a first material to form an extension;
Injection-molding the injection body with a second material while inserting the injection-molded bore therein; And
Forming or inserting the shaft into the rotation shaft formed in the bore; Method for manufacturing a housing of an electronic throttle valve comprising a. The method of claim 13,
The extension part extends from the inner side of the bore toward the air flow passage,
After the step of injection-molding the injection body with the second material, removing the extension from the inner surface of the bore; further comprising a method of manufacturing the housing of the electronic throttle valve.

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