JP5267472B2 - Tumble control valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the strength of a valve element 5 without deteriorating problems of a side clearance due to a reinforcing fiber and an elastomer component included in a resin material in a TCV device 1. <P>SOLUTION: A valve element 5 has a metal plate 30 as a metal part and a resin part 31, and in the peripheral edge of the valve element 5, two short edges 11 and 12 forming a side clearance are the peripheral edge of the resin part 31. Thereby, part of the valve element 5 is provided by the metal plate 30, improving the strength of the valve element 5. Further, since the peripheral edge of the valve element 5 forming the side clearance is formed of the resin part 31, an increase in unevenness of the side clearance due to a dimensional tolerance different between the valve element 5 and the housing 6 can be prevented by forming the valve element 5 and the housing 6 at the same time, using the same mold. Then, the strength of the valve element 5 can be improved without deteriorating problems of the side clearance. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a tumble control valve device (hereinafter referred to as a TCV device) that generates tumble in a cylinder of an engine.

  Conventionally, as shown in FIGS. 10 and 11, the TCV device 100 rotates a plate-like valve body 104 rotatably disposed in an intake passage 103 communicating with a cylinder 102 of the engine 101, and a valve body 104. And a housing 105 that supports the movably and forms a part of the intake passage 103. Further, the valve body 104 is rotated in the housing 105 to generate a tumble, and a valve portion 106 that restricts the intake passage 103, and a shaft fitting portion 107 that receives fitting of a rotation shaft (not shown). And is rotated integrally with the rotation shaft by being driven by a predetermined actuator (not shown) (see, for example, Patent Document 1).

  The peripheral edge of the valve portion 106 has, for example, two parallel short edges 108 and 109 and a long edge 110 that is perpendicular to the short edges 108 and 109 and connects one end of the short edges 108 and 109 to each other. It is rectangular.

  The short edges 108 and 109 form a clearance between the inner peripheral surface 111 of the housing 105 (hereinafter referred to as the clearance formed between the short edges 108 and 109 and the inner peripheral surface 111 of the housing 105. The long edge 110 forms a missing portion 112 between the inner peripheral surface 111 and the long edge 110. Further, the shaft fitting portion 107 is provided on the other side of the short edges 108 and 109, and a turning shaft is fitted thereon, and the long edge 110 turns around the turning shaft while drawing an arc.

Thereby, for example, when the intake shaft 103 is throttled by rotating the rotation shaft so that the degree of communication between the upstream side and the downstream side of the valve unit 106 is minimized, the air missing portion 112 is removed. Only passes through the cylinder 102 and is sucked into the cylinder 102, and a tumble is generated in the cylinder 102.
In the following description, the state where the degree of communication between the upstream side and the downstream side of the valve unit 106 is minimized, and the state where air passes through only the missing part 112 and is sucked into the cylinder 102 is referred to as “fully closed”. A state in which the degree of communication between the upstream side and the downstream side of the valve unit 106 is maximized and air passes through almost the entire cross section of the intake passage 103 and is sucked into the cylinder 102 is referred to as “fully open”.

In order to generate a good tumble, it is preferable to reduce the side clearance in the fully closed state as much as possible.
In recent years, there has been an increasing demand for increasing the strength of the valve body 104 of the TCV device 100, and the resin fiber material of the valve body 104 and the housing 105 has been improved in the content of reinforcing fibers and elastomer components. However, as the content of reinforcing fibers and elastomer components in the resin material increases, the linear expansion coefficient increases, and the direction in which the resin material linearly expands is greatly influenced by the orientation direction of the reinforcing fibers.

  For this reason, when the content rate of the reinforcing fiber and the elastomer component in the resin material increases, the side clearance is formed on the valve portion 106 side (the vicinity of the short edges 108 and 109) and the side clearance is formed on the housing 105 side. Due to the difference in the orientation direction of the reinforcing fibers between the portion to be formed (the vicinity of the inner peripheral surface 111), the following situation is concerned.

  That is, when the temperature is low, the side clearance in the fully closed state increases and sufficient tumble does not occur, and there is a concern that emissions may deteriorate. At the high temperature, the side clearance in the fully closed state decreases and the valve body 104 may be locked. Is done. In order to avoid these situations, it is considered that the reinforcing fibers should be oriented so that the respective portions do not expand and contract on the inner and outer peripheral sides with respect to both portions forming the side clearance. It is almost impossible to achieve an ideal orientation.

  That is, in order to prevent the valve body 104 and the housing 105 from having different dimensional tolerances, the supported bearing portions 113 provided at both axial ends of the shaft fitting portion 107 are accommodated in the bearing portions 114 of the housing 105. The bearings 115 are mounted at the same time using the same mold so that the bearing 115 is mounted between the bearing portion 113 and the bearing portion 114 to form a bearing structure. When the valve body 104 and the housing 105 are simultaneously molded by the same mold as described above, the position of the injection port of the resin material is greatly limited, and an ideal orientation is realized with respect to the orientation direction of the reinforcing fibers. It becomes almost impossible to do.

  In addition, it is possible to achieve ideal orientation by increasing the degree of freedom of the injection port by molding the valve body 104 and the housing 105 with different molds. The valve body 104 and the housing 105 have different dimensional tolerances, and the variation in side clearance becomes large.

  Patent Document 2 discloses a valve device in which a valve body of a throttle valve is provided with a metal plate and a resin layer, and the periphery of the metal plate is the periphery of the valve body. And according to this valve apparatus, since a part of valve body can be provided with a metal, the strength improvement of a valve body can be achieved.

  However, according to the valve device of Patent Document 2, the clearance corresponding to the side clearance is formed by the inner peripheral surface of the metal throttle body and the peripheral edge of the valve body made of metal. For this reason, the vicinity of the periphery of the valve body that forms the clearance and the vicinity of the inner peripheral surface of the throttle body are individually provided differently from the valve body 104 and the housing 105 of the TCV device 100. Variation in clearance will increase. That is, the valve device of Patent Document 2 is not so much considered with respect to the problem of side clearance.

Further, the following situation is concerned about the elastomer component.
That is, as shown in FIG. 11B, for example, the elastomer component includes the dimension L1 when the valve body 104, the housing 105, etc. are cooled to room temperature for the first time after annealing, and the actual use atmosphere in the engine room (for example, , 120 ° C.), and then greatly affects the dimensional difference (L2−L1) generated between the dimensional difference L2 and the dimension L2 when cooled to room temperature again. The phenomenon in which a dimensional difference occurs through a simple process is called post-expansion). Then, the higher the content of the elastomer component in the resin material, the more significant the post-expansion becomes, and there is a concern that the side clearance becomes small and the valve body 104 is locked.

JP 2009-52426 A JP 2002-285863 A

  The present invention has been made in order to solve the above-described problems, and the purpose thereof is to exacerbate the problem of side clearance caused by reinforcing fibers and elastomer components contained in the resin material in the TCV device. The purpose is to increase the strength of the valve body.

[Means of Claim 1]
The TCV device according to claim 1 generates tumble in the cylinder of the engine, and rotates the valve body with a plate-like valve body that is rotatably disposed in an intake passage that communicates with the cylinder of the engine. And a resin-made housing that is movably supported and forms a part of the intake passage. The valve body has a metal part made of a metal material and a resin part made of a resin material, and a part of the periphery forms a clearance between the inner peripheral surface of the housing. And the part which forms clearance among the periphery of a valve body is a periphery of a resin part.

  Thereby, the strength improvement of a valve body can be achieved by including a metal part in a valve body, without raising the content rate of the reinforced fiber and elastomer component in a resin material. Further, even if the valve body includes a metal portion, the periphery of the valve body forming the side clearance is made of a resin material. Therefore, by simultaneously molding the valve body and the housing using the same mold, the valve body It is possible to prevent the side clearance from increasing due to the difference in dimensional tolerance between the housing and the housing. For this reason, the strength of the valve body can be increased without deteriorating the problem of side clearance caused by the reinforcing fiber and the elastomer component.

According to the TCV device of the first aspect , the metal portion is a metal plate, and the valve body is provided by placing the metal plate in a mold in advance and performing insert molding. And the periphery of a metal plate is distribute | arranged so that the periphery of the resin part which forms clearance may be followed.
As a result, the metal portion and the resin portion are fixed to each other in the valve body, and the vicinity of the periphery of the resin portion forming the side clearance is reliably restrained by the metal plate, so that it is difficult to expand and contract to the inner and outer peripheral sides. For this reason, the strength of the valve body can be increased while suppressing the problem of side clearance.

Furthermore, according to the TCV device of the first aspect , the valve body has a shaft fitting portion that receives the fitting of the rotating shaft, and the rotating shaft is driven by a predetermined actuator to rotate the rotating shaft. And rotate together. The metal plate is deformed and insert-molded so as to be incorporated in the shaft fitting portion.

  When the metal plate is arranged in the mold and the valve body is insert-molded, the resin portion is not restrained by the metal plate and is likely to expand as the distance from the fixing interface with the metal plate increases. For this reason, there is a risk that warping may occur in an insufficiently constrained region that expands relatively far from the fixing interface due to a difference in expansion amount from a sufficiently constrained region that does not expand so much near the fixing interface. .

  For this reason, when the shaft fitting portion is provided only by the resin portion without incorporating the metal plate in the shaft fitting portion, the shaft fitting portion is included in an insufficiently constrained region, and the shaft fitting portion is warped. There is a possibility that the rotation shaft may be hindered. Therefore, a metal plate is also incorporated in the shaft fitting portion so that the shaft fitting portion is included in a sufficiently restricted area, and the shaft fitting portion is prevented from warping and fitting of the rotating shaft. Can be prevented from occurring.

[Means of claim 2 ]
According to the TCV device of the second aspect , the portion of the metal plate, which is built in the shaft fitting portion, forms a detent between the rotating shaft.
Thereby, even if the resin part is damaged in the shaft fitting part and the fitting of the rotating shaft by the resin part cannot be maintained, the rotation of the metal plate and the rotating shaft prevents the valve body and the rotating shaft. Can rotate together.

[Means of Claims 3 and 4 ]
According to the TCV device according to claims 3 and 4 , the valve body has a valve portion that rotates in the housing to throttle the intake passage in order to generate tumble, and a part of the periphery of the valve portion is the housing. A clearance is formed between the inner peripheral surface of each of them. Further, a portion of the metal plate that is built in the valve portion is provided with a through hole that penetrates between the front and back surfaces of the metal plate, and the resin portion that is formed by filling the through hole with a resin material is The resin portion formed on at least one of the front and back surfaces of the metal plate is continuous. And the hole edge of a through-hole has the unevenness | corrugation which protrudes in the transversal direction perpendicular | vertical to the longitudinal direction of a through-hole, or is depressed.

  Thereby, it becomes possible to prevent the resin portion that is fixed to the front and back surfaces of the metal plate from being peeled off from the metal plate by the resin portion formed in the through hole. And by making the hole edge of the through hole into a shape that has a concave or convex shape that protrudes in the short direction perpendicular to the longitudinal direction of the through hole or is recessed, the area of the through hole is suppressed, The stress generated in the resin portion due to the restraint on the resin portion can be reduced.

  In other words, when the air can move freely through the through hole between the front side and the back side of the metal plate due to damage of the resin part, etc., the smaller the through hole area, the more tumble occurs. Is advantageous to. On the other hand, in order to reduce the stress, the larger the effective length of the hole edge in the direction perpendicular to the expansion / contraction direction of the resin portion, the larger the pressure-receiving surface of the stress.

  Therefore, the direction perpendicular to the expansion / contraction direction of the resin portion is made to substantially coincide with the longitudinal direction of the through hole, and the effective length of the hole edge is set to be sufficiently long so that the targeted stress reduction can be achieved. And, after setting the effective length of the hole edge so that the target stress reduction can be achieved, the hole edge is deformed into an uneven shape to reduce the area of the through hole and generate tumble when the resin part is broken Do not be disadvantaged.

  As described above, by forming the hole edge of the through hole into a shape having projections and depressions protruding in the short direction perpendicular to the longitudinal direction of the through hole, the metal plate while suppressing the area of the through hole It is possible to reduce the stress generated in the resin portion as the resin portion is restrained.

It is explanatory drawing which shows arrangement | positioning of the TCV apparatus with respect to an engine (Example). (A) is a perspective view of a TCV apparatus, (b) is a perspective view which shows the surface side of a valve body, (c) is a perspective view which shows the back surface side of a valve body (Example). (A) is a front view of the TCV device showing the side clearance, (b) is a side view of the valve body, (c) is a cross-sectional view taken along line AA of (b) (Example). (A) is BB sectional drawing of FIG.3 (b), (b) is explanatory drawing which shows the generation | occurrence | production state of the curvature at the time of comprising a metal plate only from a 1st structure part, (c) is It is explanatory drawing which shows the generation | occurrence | production state of the curvature at the time of comprising a metal plate only from a 1st structure part and a 2nd structure part (Example). (A) is a perspective view which shows the insert state of a metal plate, (b) is a rear view which shows the insert state of a metal plate, (c) is CC sectional drawing of (b) (Example) ). (A) is explanatory drawing which shows the shape of a connecting hole, (b) is explanatory drawing which shows a connecting part (Example). (A) is a front view of a valve body, (b) is DD sectional drawing of (a) (modification). It is sectional drawing of a valve body (modified example). It is sectional drawing of a valve body (modified example). (A) is a perspective view of a TCV device, (b) is a front view of the TCV device showing a side clearance (conventional example). (A) is explanatory drawing which shows arrangement | positioning of the TCV apparatus with respect to an engine, (b) is a time chart which shows back expansion (conventional example).

The TCV device according to the embodiment generates a tumble in the cylinder of the engine, and a plate-like valve body that is rotatably arranged in an intake passage that communicates with the cylinder of the engine, and the valve body is rotatable. And a resin housing that supports and forms a part of the intake passage. The valve body has a metal part made of a metal material and a resin part made of a resin material, and a part of the periphery forms a clearance between the inner peripheral surface of the housing. And the part which forms clearance among the periphery of a valve body is a periphery of a resin part.

Further, the metal part is a metal plate, and the valve body is provided by placing the metal plate in a mold in advance and performing insert molding. And the periphery of a metal plate is distribute | arranged so that the periphery of the resin part which forms clearance may be followed.
Further, the valve body has a shaft fitting portion that receives the fitting of the rotating shaft, and rotates together with the rotating shaft when the rotating shaft is driven by a predetermined actuator. The metal plate is deformed and insert-molded so as to be incorporated in the shaft fitting portion. Further, a portion of the metal plate built in the shaft fitting portion forms a detent between the rotating shaft.

  Further, the valve body has a valve portion that rotates in the housing to throttle the intake passage in order to generate tumble, and a part of the periphery of the valve portion forms a clearance with the inner peripheral surface of the housing. . Further, a portion of the metal plate that is built in the valve portion is provided with a through hole that penetrates between the front and back surfaces of the metal plate, and the resin portion that is formed by filling the through hole with a resin material is The resin portion formed on at least one of the front and back surfaces of the metal plate is continuous. And the hole edge of a through-hole has the unevenness | corrugation which protrudes in the transversal direction perpendicular | vertical to the longitudinal direction of a through-hole, or is depressed.

[Configuration of Example]
The structure of the TCV apparatus 1 of an Example is demonstrated based on drawing.
As shown in FIG. 1, the TCV device 1 generates a tumble in a cylinder 3 of the engine 2, and a plate-like valve body 5 that is rotatably arranged in an intake passage 4 that communicates with the cylinder 3. And a housing 6 that rotatably supports the valve body 5 and forms a part of the intake passage 4.

  As shown in FIGS. 2 and 3, the valve body 5 includes a valve portion 9 that rotates within the housing 6 to throttle the intake passage 4 to generate a tumble, and a rotation shaft (not shown). It has a shaft fitting portion 10 that receives the fitting, and rotates together with the rotation shaft by being driven by a predetermined actuator (not shown).

  The valve portion 9 is provided in a substantially rectangular shape, and the peripheral edge of the valve portion 9 is two parallel short edges 11 and 12 and one end of the short edges 11 and 12 substantially perpendicular to the short edges 11 and 12. And a long edge 13 connecting the two. The inner peripheral surface 14 of the housing 6 is also provided in a substantially rectangular shape so as to correspond to the shape of the valve portion 9, and the short edges 11 and 12 each form a side clearance with the inner peripheral surface 14. . Moreover, the both ends of the long edge 13 protrude in the one side in the axial direction, and the missing part 15 is formed between the inner peripheral surfaces 14 in the fully closed state. Then, the long edge 13 rotates while drawing an arc around the rotation axis.

  In the following description, as shown in FIG. 3, the direction from the axis of rotation to the long edge 13 is defined as one side in the height direction and the rotation from the long edge 13 is performed. The direction toward the axis is defined as the other side in the height direction. Further, the direction from the back surface 18 to the front surface 19 of the valve portion 9 is defined as one side in the thickness direction, and the direction from the front surface 19 to the back surface 18 is defined as the other side in the thickness direction.

Further, regarding the axial direction, as shown in FIG. 3A, the left side when the surface 19 is viewed with the long edge 13 as the upper side and the rotation axis as the lower side is defined as one side, and the right side is defined as the other side. To do.
Further, the valve body 5 is mounted on the housing 6 so that the front surface 19 is upstream and the back surface 18 is downstream when fully closed, so that the front surface 19 is mainly exposed to the air flow when fully open. Is rotated.

  The shaft fitting portion 10 is provided so as to be continuous with the other end in the height direction of the valve portion 9. Moreover, in the shaft fitting part 10, the shaft hole 20 through which the rotation shaft passes is penetrated in the axial direction, and the shaft hole 20 is closer to the center from both ends in the axial direction as shown in FIG. The cross-sectional area perpendicular to the axial direction is reduced so that the area near the center in the axial direction is the smallest.

  Then, the outer surface of the rotation shaft is pressure-bonded to the hole surface of the portion having the smallest area, so that the rotation shaft is fitted to the shaft fitting portion 10. That is, the shaft fitting portion 10 substantially holds the rotating shaft at the axial center portion 21. In addition, the cross section perpendicular | vertical to the axial direction of a rotating shaft is substantially square, and the cross section perpendicular | vertical to the axial direction of the hole surface of the axial direction center part 21 which hold | maintains a rotating shaft among shaft holes 20 is also substantially. It is a square.

  Further, at both ends in the axial direction of the shaft fitting portion 10, there are provided bearing portions 25 that are supported by bearing portions 24 provided on the housing 6 via bearings 23. It is provided so as to penetrate the landing part 10 and the bearing part 25 coaxially. The valve body 5 and the housing 6 are simultaneously molded using the same mold so that the bearing part 25 is in the bearing part 24 in order to prevent the dimensional tolerances from being different from each other. After the molding, a bearing 23 is mounted between the bearing portion 25 and the bearing portion 24 to form a bearing structure.

  As described above, for example, when the intake shaft 4 is throttled by rotating the rotation shaft so that the degree of communication between the upstream side and the downstream side of the valve portion 9 is minimized, the air missing portion 15 Only passes through the cylinder 3 and is sucked into the cylinder 3, and a tumble is generated in the cylinder 3. That is, when the degree of communication between the upstream side and the downstream side of the valve part 9 is minimized and the valve body 5 is in a fully closed state, air passes only through the missing part 15 and tumbles into the cylinder 3. Will occur.

  In the valve portion 9, two holes penetrate between the front surface 19 and the rear surface 18 of the valve portion 9 in the vicinity of the short edges 11 and 12, respectively. These holes generate a flow of air from the intake passage 4 into the cylinder 3 separately from the flow of air passing through the missing portion 15 in order to prevent the fuel from flowing backward from the cylinder 3 when fully closed. (Hereinafter, these holes are referred to as sub-openings 26). A gasket 27 is attached to the downstream end of the housing 6. In addition, the surface 19 of the valve portion 9 extends toward the shaft fitting portion 10 to form one plane.

[Features of Examples]
The characteristics of the TCV apparatus 1 of an Example are demonstrated based on drawing.
The valve body 5 has a metal portion made of a metal plate 30 as a metal material and a resin portion 31 made of a resin material, and is provided by placing the metal plate 30 in a mold in advance and performing insert molding. Further, the peripheral edge of the valve portion 9 is formed by a resin portion 31. That is, the peripheral edge of the valve portion 9 coincides with the peripheral edge of the resin portion 31, and the short edges 11 and 12 that form the side clearance and the long edge 13 that forms the missing portion 15 are included in the peripheral edge of the resin portion 31.

As shown in FIG. 5, the metal plate 30 is provided by deforming a single plate-shaped metal material and has the following configuration.
That is, the metal plate 30 includes a first component 32 built in the valve unit 9, a second component 33, 34, a third component 35, 36, and a fourth component built in the shaft fitting unit 10. Parts 37 and 38.

  The first component 32 is built in the resin portion 31 so that its peripheral edge is along the short edges 11, 12 and the long edge 13 (see FIGS. 2 and 3). Here, the surface of the first component portion 32 is exposed so as to substantially occupy the surface 19 of the valve portion 9, and the surface 19 of the valve portion 9 is in the vicinity of the short edges 11, 12 and the long edge 13 and will be described later. It is formed by the surface of the first component 32 except for the connecting hole 42. Further, the back surface of the first component portion 32 is fixed and covered with a resin portion 31, and the resin portion 31 on the back surface 18 side is provided to include a reinforcing rib 43. The sub-opening 26 is provided so as to penetrate through the first component 32 and the resin portion 31 on the back surface 18 side.

  In addition to the sub opening 26, the first component 32 is formed with a resin portion 31 (hereinafter referred to as a connecting portion 44) that prevents the resin portion 31 from peeling off from the metal plate 30. The connecting hole 42 penetrates. As shown in FIG. 6, the connecting hole 42 has a “brow shape” in which the straight portion of the track-like ellipse projects in an arc shape in the short direction with respect to the hole edge 45.

  The connecting hole 42 is provided at the center in the axial direction along the long edge 13 so that the longitudinal direction thereof coincides with the axial direction, and the connecting hole 42 is filled with a resin material to form a connecting portion 44 (see FIG. 2 and FIG. 3). Further, the connecting portion 44 is provided so as to be flush with the surface of the first component portion 32 and forms the surface 19 of the valve portion 9. The connecting portion 44 is continuous with the resin portion 31 that is fixed to the back surface of the first component portion 32.

  Here, since the height direction substantially coincides with the expansion and contraction direction of the resin portion 31 in the valve portion 9, the one side hole edge 46 on one side in the height direction of the hole edge 45 of the connecting hole 42 is For example, a pressure receiving surface that receives stress generated by expansion of the resin portion 31 is formed, and the other side hole edge 47 on the other side in the height direction forms, for example, a pressure receiving surface that receives stress generated by contraction of the resin portion 31.

The second components 33 and 34 are bent continuously from the other end in the height direction of the first component 32 to the other side in the thickness direction, and the third components 35 and 36 are Each of the second components 33 and 34 is bent continuously from the other end in the thickness direction toward the other side in the height direction. Further, the fourth component 37 is continuously bent from one end in the axial direction of the third component 35 to the one side in the thickness direction, and the fourth component 38 is the third component 36. From the other end in the axial direction, it is bent vertically toward one side in the thickness direction and is continuous.

That is, the second to fourth components 33, 35, and 37 and the second to fourth components 34, 36, and 38 are provided so as to be symmetrical in the axial direction with the axial center portion 21 interposed therebetween. The component parts 33 and 34 are built in the resin part 31 that forms one side in the height direction of the shaft hole 20, and the third component parts 35 and 36 are built in the resin part 31 that forms the other side in the thickness direction of the shaft hole 20. Has been. In addition, the fourth component portions 37 and 38 are each provided with an opening 48 that opens in a substantially square shape in the axial direction so as to form a detent between the rotation shaft and the fourth component portions 37 and 38, respectively. It is built in a resin portion 31 that forms a portion near one end and a portion near the other end.

In addition, the hole surface which forms the shaft hole 20 consists of the resin part 31, and the hole surface which consists of the resin part 31 presses directly on the outer surface of a rotating shaft, and the axial direction center of the shaft fitting part 10 is carried out. The part 21 substantially holds the rotating shaft.
In addition, the second and third components 33 to 36 are partially exposed without being covered with the resin portion 31 (see FIG. 2C), and this exposed portion supports the metal plate 30 in the mold. It is provided by molding the resin portion 31 in a state in which the supporting portion to be contacted.

[Effects of Examples]
According to the TCV device 1 of the embodiment, the valve body 5 includes a metal plate 30 as a metal portion and a resin portion 31, and two short edges 11 that form a side clearance among the peripheral edges of the valve body 5, Reference numeral 12 denotes a peripheral edge of the resin portion 31.
Thereby, since part of the valve body 5 can be provided by the metal plate 30, the strength of the valve body 5 can be increased without increasing the content of reinforcing fibers and elastomer components in the resin portion 31.

  Even if the valve body 5 includes a metal portion, the peripheral edge of the valve body 5 forming the side clearance is made of the resin portion 31. Therefore, the valve body 5 and the housing 6 are simultaneously molded using the same mold. As a result, it is possible to prevent an increase in variation in side clearance due to the dimensional tolerances of the valve body 5 and the housing 6 being different. For this reason, the strength of the valve body 5 can be increased without deteriorating the problem of side clearance caused by the reinforcing fibers and the elastomer component.

Moreover, the valve body 5 is provided by placing the metal plate 30 in the mold in advance and insert molding, and the peripheral edge of the metal plate 30 is arranged along the short edges 11 and 12.
As a result, the metal plate 30 and the resin portion 31 are fixed to each other in the valve body 5, and the vicinity of the short edges 11 and 12 made of the resin portion 31 is securely restrained by the metal plate 30, and expands and contracts toward the inner and outer peripheral sides. It becomes difficult. For this reason, the strength of the valve body 5 can be increased while suppressing the problem of side clearance.

The metal plate 30 is also incorporated in the resin portion 31 forming one side in the height direction of the shaft hole 20 and the resin portion 31 forming the other side in the thickness direction of the shaft hole 20 in the shaft fitting portion 10. In this way, it is deformed and insert molded.
When a metal material such as the metal plate 30 is placed in the mold and the valve body 5 is insert-molded, the resin is not constrained by the metal material as the distance from the fixing interface with the metal material increases, and the resin tends to expand. For this reason, there is a risk that warping may occur in an insufficiently constrained region that expands relatively far from the fixing interface due to a difference in expansion amount from a sufficiently constrained region that does not expand so much near the fixing interface. .

  For this reason, when the shaft fitting part 10 is provided only by the resin part 31 without incorporating the metal plate 30 in the shaft fitting part 10 (that is, when the metal plate 30 is constituted only by the first component part 32: FIG. (See (b)), the entire shaft fitting portion 10 is included in a region where restraint is insufficient, and the entire shaft fitting portion 10 may be warped, which may cause trouble in fitting the rotating shaft. There is. Furthermore, when the metal plate 30 is composed of only the first component 32 and the second components 33 and 34 (see FIG. 4C), the other side in the height direction of the shaft hole 20 in the shaft fitting portion 10. Therefore, there is a possibility that the resin portion 31 is included in an area where the restraint is insufficient, and the resin portion 31 is warped, which may hinder the fitting of the rotating shaft.

  Therefore, the metal plate 30 is also built in the resin portion 31 forming one side in the height direction of the shaft hole 20 and the resin portion 31 forming the other side in the thickness direction of the shaft hole 20 in the shaft fitting portion 10. Thus, the entire shaft fitting portion 10 can be included in a sufficiently restricted region so that no warpage occurs in the shaft fitting portion 10 so that no trouble is caused in fitting the rotating shaft.

Moreover, the 4th structure parts 37 and 38 of the metal plate 30 have the opening 48 so that a rotation stop can be formed between rotation axes.
Thereby, even if the resin portion 31 is damaged in the shaft fitting portion 10 and the fitting of the rotating shaft by the resin portion 31 cannot be maintained, the rotation of the fourth component portions 37 and 38 and the rotating shaft is prevented. The valve body 5 and the rotation shaft can rotate together.

In addition, a connecting hole 42 for forming a connecting portion 44 that suppresses the resin portion 31 from peeling from the metal plate 30 passes through the first component portion 32 of the metal plate 30. The connecting hole 42 has a “eyebrows shape” in which the straight portion of the track-like ellipse projects in an arc shape in the short direction with respect to the hole edge 45 (see FIG. 6).
Thereby, the stress which generate | occur | produces in the resin part 31 with the restraint with respect to the resin part 31 of the metal plate 30 can be reduced, suppressing the area of the joint hole 42. FIG.

  That is, if the air can freely move through the connecting hole 42 between the front surface and the back surface of the metal plate 30 due to breakage of the resin portion 31 or the like, the smaller the connecting hole 42 is, the smaller the tumble area is. This is advantageous for the occurrence of On the other hand, in order to reduce the stress, the larger the effective length of the hole edge 45 in the direction perpendicular to the expansion / contraction direction of the resin portion 31, the greater the effective pressure receiving area that receives the stress.

  Therefore, the direction (axial direction) perpendicular to the expansion / contraction direction (height direction) of the resin portion 31 is made to substantially coincide with the longitudinal direction of the connecting hole 42, and the stress reduction aimed at the effective length of the hole edge 45 is achieved. Set it long enough to do so. Then, after setting the effective length of the hole edge 45 so that the target stress reduction can be achieved, the hole edge 45 is deformed into a “eyebrows shape” to reduce the area of the connecting hole 42, Do not be disadvantageous to tumble when 31 breaks.

  As described above, by making the hole edge 45 of the connecting hole 42 “brow-shaped”, the stress generated in the resin portion 31 due to the restraint on the resin portion 31 of the metal plate 30 is suppressed while suppressing the area of the connecting hole 42. Can be reduced.

Further, the valve body 5 is rotated so that the surface 19 of the valve portion 9 is mainly exposed to the air flow in the fully opened state, and the surface 19 is substantially driven by the surface of the first component portion 32 of the metal plate 30. Occupied.
Thereby, since heat dissipation from the metal plate 30 to the air is promoted, the temperature rise of the entire valve body 5 is suppressed. For this reason, since the expansion of the resin portion 31 can be reduced, the problem of side clearance can be further suppressed.

The second to fourth constituent parts 33, 35, 37 and the second to fourth constituent parts 34, 36, 38 are provided so as to be symmetrical in the axial direction with the axial center part 21 interposed therebetween, and are axially In the central portion 21, the rotation shaft is substantially held.
When the metal plate 30 is also incorporated in the axial central portion 21, the resin portion 31 of the axial central portion 21 is strongly restrained by the metal plate 30, so that the axial central portion 21 that substantially holds the rotating shaft. The hole surface is easily deformed into a concave shape or a convex shape due to expansion and contraction of the resin portion 31. As a result, there is a high possibility that the holding force with respect to the rotating shaft by the axial central portion 21 varies with time.

Therefore, the metal plate 30 is not included in the axial central portion 21 and the axial central portion 21 is configured only by the resin portion 31 to weaken the restraint by the metal plate 30 on the hole surface of the axial central portion 21. As a result, the hole surface of the central portion 21 in the axial direction is not easily deformed into a concave shape or a convex shape, so that the possibility that the holding force fluctuates with time can be reduced.

[Modification]
The aspect of the TCV apparatus 1 is not limited to an Example, Various modifications can be considered.
For example, according to the TCV device 1 of the embodiment, the strength of the valve body 5 is increased by placing the metal plate 30 in the mold in advance and insert molding, but for example, only the resin portion 31 is molded. Alternatively, the strength of the valve body 5 may be increased by attaching the metal plate 30 to the resin portion 31 later (see FIG. 7).

In this case, since the resin portion 31 is less restrained by the metal plate 30 than in the embodiment, the distinction between the region that is sufficiently restrained by the metal plate 30 and the region that is insufficient is not clear. The warp of the portion 10 does not occur.
Further, in the TCV device 1 of the embodiment, for example, a hole 51 penetrating in the height direction is provided in a portion on one side in the height direction of the axial center portion 21 and a screw hole is provided in the rotating shaft, By fastening the valve body 5 and the rotation shaft with the screw 52, the holding state of the rotation shaft by the shaft fitting portion 10 may be strengthened (see FIG. 8).

  Further, according to the TCV device 1 of the embodiment, the hole surface forming the shaft hole 20 in the shaft fitting portion 10 is all made of the resin portion 31, and the hole surface made of the resin portion 31 is directly on the outer surface of the rotating shaft. In this case, the rotation shaft is substantially held by the pressure bonding, but a part of the shaft hole 20 is formed by the surface of the metal plate 30 (that is, the metal surface), and the hole surface made of the metal surface is rotated. You may make it hold | maintain a rotating shaft substantially by crimping | bonding directly to the outer surface of a moving shaft. In this case, you may comprise the part which hold | maintains a rotating shaft substantially by the metal member 53 different from the metal plate 30 (refer FIG. 9).

  Further, according to the TCV device 1 of the embodiment, the metal portion is configured by the metal plate 30, but, for example, the metal portion may be configured by a metal mesh. In this case, the valve body 5 can be reduced in weight.

1 TCV device (tumble control valve device)
2 Engine 3 Cylinder 4 Intake passage 5 Valve body 6 Housing 9 Valve portion 10 Shaft fitting portion 11 Short edge (part of the periphery, part of the periphery of the valve body forming the clearance)
12 Short edge (part of the periphery, part of the periphery of the valve body that forms the clearance)
14 Inner peripheral surface (inner peripheral surface of housing)
30 Metal plate 31 Resin part 42 Connecting hole (through hole)
44 connecting part (resin part formed by filling the through hole with resin material)
45 hole edge (through hole hole edge)

Claims (4)

In the tumble control valve device that generates tumble in the cylinder of the engine,
A plate-like valve body rotatably disposed in an intake passage communicating with the cylinder of the engine, and a resin housing that rotatably supports the valve body and forms a part of the intake passage Prepared,
The valve body has a metal portion made of a metal plate as a metal material and a resin portion made of a resin material, and a part of the periphery forms a clearance between the inner peripheral surface of the housing,
Of the peripheral edge of the valve body, the portion forming the clearance is the peripheral edge of the resin portion ,
The valve body is provided by pre-installing the metal plate in a mold and insert molding, and the periphery of the metal plate is arranged along the periphery of the resin part forming the clearance,
The valve body has a shaft fitting portion that receives the fitting of the rotating shaft, and rotates together with the rotating shaft by being driven by a predetermined actuator,
The tumble control valve device is characterized in that the metal plate is deformed and insert-molded so as to be incorporated in the shaft fitting portion . In the tumble control valve device according to claim 1,
A tumble control valve device characterized in that a portion of the metal plate built in the shaft fitting portion forms a detent between the rotation shaft and the portion . In the tumble control valve device that generates tumble in the cylinder of the engine,
A plate-like valve body rotatably disposed in an intake passage communicating with the cylinder of the engine, and a resin housing that rotatably supports the valve body and forms a part of the intake passage Prepared,
The valve body has a metal portion made of a metal plate as a metal material and a resin portion made of a resin material, and a part of the periphery forms a clearance between the inner peripheral surface of the housing,
Of the peripheral edge of the valve body, the portion forming the clearance is the peripheral edge of the resin portion,
The valve body is provided by pre-installing the metal plate in a mold and insert molding, and the periphery of the metal plate is arranged along the periphery of the resin part forming the clearance,
The valve body has a valve portion that rotates in the housing to throttle the intake passage in order to generate tumble, and a part of the periphery of the valve portion is between the inner peripheral surface of the housing and the valve body. Forming a clearance,
Of the metal plate, the part built in the valve portion is provided with a through-hole penetrating between the front surface and the back surface of the metal plate,
The resin portion formed by filling the through hole with the resin material is continuous with the resin portion formed on at least one of the front surface and the back surface of the metal plate,
The tumble control valve device characterized in that a hole edge of the through hole has an unevenness protruding or recessed in a short direction perpendicular to the longitudinal direction of the through hole . In the tumble control valve device according to claim 1 or 2 ,
The valve body has a valve portion that rotates in the housing to throttle the intake passage in order to generate tumble, and a part of the periphery of the valve portion is between the inner peripheral surface of the housing and the valve body. Forming a clearance,
Of the metal plate, the part built in the valve portion is provided with a through-hole penetrating between the front surface and the back surface of the metal plate,
The resin portion formed by filling the through hole with the resin material is continuous with the resin portion formed on at least one of the front surface and the back surface of the metal plate,
The tumble control valve device characterized in that a hole edge of the through hole has an unevenness protruding or recessed in a short direction perpendicular to the longitudinal direction of the through hole .

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