JP2020020299A - Intake system component - Google Patents

Abstract

To provide an intake system component capable of realizing welding with desired welding strength even in a case of having a welding surface that cannot be pressed directly when a plurality of members is welded.SOLUTION: In an intake system component having a structure and a closed space, a first member, a second member, and a third member, which are divided from each other, are formed by welding while pressurizing. The structure is defined by the second member and the third member, at least a part of the welding surface of the structure is arranged in the closed space, and either the first member or the second member comprises a partition part that contacts with the inner wall surface of the other of the first member and the second member.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an intake system component, and more particularly to an intake system component constituting an intake passage of an internal combustion engine.

  In the intake passage that introduces outside air to the internal combustion engine, an air cleaner that filters dust contained in the outside air when introducing outside air, a silencer that reduces intake noise generated by opening and closing the intake valve, etc. Various structures are attached, and intake system components having an air cleaner, a silencer, and the like in these intake passages are known.

  In such an intake system component, a plurality of divided bodies made of synthetic resin or the like are welded to each other to be integrated, and various advantages such as reduction in the number of parts and weight are known by using synthetic resin. Have been.

  For example, an intake duct described in Patent Document 1 below is configured by combining two half-pieces made of a fiber molded body, and describes a method of integrating the half-pieces with each other by heat welding. . The means for welding a plurality of divided bodies made of synthetic resin to each other is not limited to thermal welding, and various welding means such as vibration welding and ultrasonic welding are known.

JP 2015-34508 A

  However, according to the configuration of the conventional intake system components described above, it is necessary to set the arrangement of the intake passage and the structure so that the intake passage and the structure can be simply constituted by two half bodies as described in Patent Document 1, There is a problem that it is difficult to set a complicated form.

  For example, when an intake system component is configured by three or more divided bodies, it is widely practiced to perform a welding step in two stages of first welding a first member and a second member and then second welding a third member. Although it is performed, if it becomes a complicated form, the welding surface of the second member and the third member is covered with the first member in the secondary welding, and the vibration jig directly suppresses the welding surface. However, there was a problem that the welding strength at the site was reduced. Therefore, a structure having such a complicated form cannot be adopted, and there is a problem that the degree of freedom in design is low.

  Therefore, the present invention has been made in view of the above problems, and can achieve welding having a desired welding strength even when a plurality of members have a welding surface that cannot be directly pressed when welding is performed. It is intended to provide an intake system component.

  An intake system component according to the present invention is an intake system component that is formed by welding a first member, a second member, and a third member that are divided from each other while applying pressure, and that has a structure and a closed space, The structure is defined by the second member and the third member, and at least a part of a welding surface of the structure is disposed in the closed space, and any one of the first member and the second member is provided. One of the first and second members is provided with a partitioning portion that comes into contact with the other inner wall surface of the first member and the second member.

  Further, in the intake system component according to the present invention, the second member has a first structure division part that constitutes a part of the structure, and the partition part is the first structure division part. It is preferred to be arranged along the outer edge of.

  Further, in the intake system component according to the present invention, it is preferable that the second member includes a side wall defining a side wall of the closed space, and the partition has a predetermined gap between the partition and the side wall. It is.

  Further, in the intake system component according to the present invention, it is preferable that the third member defines at least a bottom surface of the closed space and a second structure division portion corresponding to the first structure division portion. .

  In the intake system component according to the present invention, it is preferable that the first member defines at least a top surface of the closed space.

  In the intake system component according to the present invention, it is preferable that the third member is welded to the second member after the first member and the second member are welded.

  The above summary of the present invention does not enumerate all the necessary features of the present invention, and a sub-combination of these features may also be an invention.

  In the intake system component according to the present invention, one of the first member and the second member includes the partition portion that contacts the inner wall surface of the other of the first member and the second member. Even if the third member is secondarily welded after the first welding of the two members, the vibration by the vibrating jig in contact with the first member can vibrate the welding surface via the partition portion. Even in a structure in which the welding surface cannot be directly vibrated, welding strength can be ensured.

1 is a perspective view of an intake system component according to an embodiment of the present invention. FIG. 2 is an exploded view of an intake system component according to the embodiment of the present invention. The figure which shows the structure of a 2nd member and a 3rd member. AA sectional drawing in FIG. FIG. 4 is a perspective view for explaining a primary welding step of the intake system component according to the embodiment of the present invention. FIG. 4 is a perspective view for explaining a step of secondary welding of the intake system component according to the embodiment of the present invention.

  Hereinafter, a preferred embodiment for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of the features described in the embodiments are necessarily essential for solving the invention. .

  FIG. 1 is a perspective view of an intake system component according to the embodiment of the present invention, FIG. 2 is an exploded view of the intake system component according to the embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 5 is a perspective view for explaining a primary welding process of an intake system component according to the embodiment of the present invention. FIG. 6 is a perspective view for explaining a step of secondary welding of the intake system component according to the embodiment of the present invention.

  As shown in FIG. 1, an intake system component 1 according to the present embodiment includes a pipeline 2 as a structure serving as an intake passage for introducing filtered outside air into an internal combustion engine, and an integral with the pipeline 2. Attached and has a closed space 3 which becomes a box-shaped resonator main body having a predetermined capacity. The conduit 2 is a cylindrical member having an inner wall formed smoothly, and various shapes such as a circular shape, an elliptical shape, and a polygonal shape are known.

  The pipe 2 and the inside of the closed space 3 are communicated with each other by a communication pipe (not shown). The volume of the closed space 3 and the diameter and length of the communication pipe are determined based on Helmholtz's resonance theory according to the frequency to be attenuated. Is determined. The intake noise is reduced by setting the frequency according to the intake noise as pulsation noise generated by opening and closing the intake valve by driving the internal combustion engine.

  As shown in FIG. 2, the intake system component 1 according to the present embodiment is obtained by laminating a first member 10, a second member 20, and a third member 30 each formed of a synthetic resin and integrating them by welding. I have. Here, various welding methods can be applied as a specific welding method. For example, vibration welding is preferably used. The specific welding method will be described later. The first member 10, the second member 20, and the third member 30 are preferably formed of a thermoplastic synthetic resin such as a polyamide resin or a polypropylene resin.

  The first member 10 is a substantially plate-shaped member, and includes a top surface 11 that closes an opening of the second member 20 and forms an upper surface of the closed space 3.

  The second member 20 has a side wall 23 that forms the outer peripheral side surface of the closed space 3, and has an opening in a direction facing the first member 10 and the third member 30. In addition, the second member 20 has a first structural body division part 24 that forms the conduit 2. The first structure division 24 is disposed so as to pass through the inside of the closed space 3, and the first structure welding surface 21 is formed along the extending direction of the first structure division 24. Have been. In addition, a partition portion 22 is provided on the surface opposite to the welding surface of the first structural body welding surface 21 (the surface facing the first member 10) so as to abut on the inner wall surface of the first member 10. Have been.

  Further, as shown in FIG. 3, the partition 22 formed on the first structural body welding surface 21 of the second member 20 has the first structure between the partition 23 and the side wall 23 forming the outer edge of the closed space 3. A gap G is formed in a direction along the extending direction of the body welding surface 21. The gap G ensures the capacity of the closed space 3 without completely dividing the closed space 3. Note that the size of the gap G can be appropriately changed according to the required requirements.

  As shown in FIG. 2, the third member 30 is a box-shaped member having an outer wall surface and a bottom surface 33 along the lower opening of the second member 20, and has a first structure division. A second structural body divided portion 32 corresponding to the portion 24 is formed. In the second structure dividing portion 32, a second structure welding surface 31 corresponding to the first structure welding surface 21 of the first structure dividing portion 24 is formed, and as shown in FIG. The pipeline 2 is configured to extend in the closed space 3 by welding the first structure welding surface 21 and the second structure welding surface 31.

  Further, as shown in FIG. 4, the partition portion 22 stands upright from the first structural body welding surface 21 and is in contact with the inner wall surface 12 of the first member 10. Therefore, when the third member 30 is secondarily welded after the first member 10 and the second member 20 are firstly welded as described later, the first structure welding surface 21 and the second structure welding surface 31 are used. Is pressed from above the first member 10 and below the third member 30 to weld the first structure welding surface 21 and the second structure welding surface 31 via the partition 22. Can be. Therefore, even when the welding surface of the conduit 2 extends inside the closed space 3, the welding surface can be reliably pressed and vibrated, so that a design having such a welding surface is possible. At the same time, the welding can be reliably performed via the partition portion 22, so that the welding strength is improved.

  Next, a method for welding the intake system components according to the present embodiment will be described with reference to FIGS. First, as the primary welding, the first member 10 and the second member 20 are welded. In the primary welding, the first member 10 is assembled to the opening end above the side wall portion 23 of the second member 20, and these members are pressed down from above and below by a jig, and one of them is vibrated so that the welding surfaces of each other are welded. Weld.

  After the primary welding, the third member 30 is assembled to the lower opening end of the second member 20 to perform the welding. At this time, as described above, the partition 22 is attached to the inner wall surface 12 of the first member 10. Since the first member 10 is in contact with the first structure 10, the first structure welding surface 21 and the second structure welding surface 31 can be pressed through the partition 22, so that the welding surface is welded. Can be performed reliably and firmly. The welding surfaces other than the first structure welding surface 21 and the second structure welding surface 31 can be welded by pressing the outer edge of the second member 20 and the third member 30.

  The intake system component 1 according to the present embodiment thus configured has a shape such that the welding surface extends to the closed space 3 such as the first structure welding surface 21 and the second structure welding surface 31. Even if there is, welding can be reliably performed, and welding strength can be ensured by reliably vibrating by the partition portion 22.

  In the intake system component 1 according to the present embodiment described above, the case has been described in which the partition 22 is erected substantially vertically from the first structure welding surface 21. It may be formed inclined with respect to the welding surface 21. With such a configuration, it is not necessary to use a slide core for the mold for molding the second member having the partition, and it is possible to suppress the manufacturing cost of the mold.

  In addition, the intake system component 1 according to the present embodiment has been described in the case where the partition 22 is formed on the second member 20, but the partition 22 is erected from the inner wall surface 12 of the first member 10. The first structure welding surface 21 may be configured to be in contact with the first structure welding surface 21.

  Furthermore, in the present embodiment, a case has been described in which the present invention is applied to a silencer including an intake passage and a resonator as an intake system component, but the closed space is not limited to the resonator, and may be applied to, for example, an air cleaner. It is. Further, in the present embodiment, the case where the pipeline is formed as the structure has been described. However, the structure is not limited to the pipeline. For example, when a small resonance chamber is separately provided in the resonator, the resonance chamber is defined. It may be used as a wall for forming.

  Further, in the present embodiment, the case where the top surface is formed on the first member and the bottom surface is formed on the third member has been described, but the bottom surface is formed on the first member, and the top surface is formed on the third member. It may be formed. Furthermore, in the present embodiment, the case where the first member, the second member, and the third member are overlapped in the vertical direction has been described, but may be overlapped in the horizontal direction and combined with each other. It is apparent from the description of the appended claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 Intake system component, 2 Pipeline, 3 Blocking space, 10 First member, 11 Top surface, 12 Inner wall surface, 20 Second member, 21 First structural body welding surface, 22 Partition, 23 Side wall, 24th 1 structure division part, 30 third member, 31 second structure welding surface, 32 second structure division part, 33 bottom surface, G gap.

Claims (6)

An intake system component formed by welding a first member, a second member, and a third member divided from each other while applying pressure, and having a structure and a closed space,
The structure is defined by the second member and the third member, and at least a part of a welding surface of the structure is disposed in the closed space;
An intake system component, wherein one of the first member and the second member includes a partition portion that contacts an inner wall surface of the other of the first member and the second member. The intake system component according to claim 1,
The second member has a first structure division portion that forms a part of the structure,
The intake system component, wherein the partition is disposed along an outer edge of the first structural body division. The intake system component according to claim 2,
The second member includes a side wall that defines a side wall of the closed space,
The intake system component, wherein the partition has a predetermined gap between the partition and the side wall. The intake system part according to claim 2 or 3,
The air intake system component, wherein the third member defines at least a bottom surface of the closed space and a second structure division portion corresponding to the first structure division portion. The intake system component according to any one of claims 1 to 4,
The air intake system component, wherein the first member defines at least a top surface of the closed space. The intake system component according to any one of claims 1 to 5,
The air intake system component, wherein the third member is welded to the second member after welding the first member and the second member.

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