JP2003254182A - Air duct with resonator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air duct equipped with a resonator capable of saving the members used and reducing the man-hours required to perform the installation. <P>SOLUTION: The air duct 1 equipped with resonator of such a structure that the resonator 5 and air duct 1 are consolidated, is formed by molding separated in two members, wherein the resonator 5 is pinched by the joining part so that the resonator 5 and air duct 1 are consolidated. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air duct with a resonator, which is suitable for use in an automobile intake system piping or the like.

[0002]

2. Description of the Related Art In recent automobiles, especially passenger automobiles, it is required that the operation of each equipment to be installed be quiet, and in response to this, the intake noise of the air duct used for the intake system piping is also increased. Air ducts with a resonator (air pool for muffling) are often used to reduce noise. In this case, the air duct is generally manufactured by molding using resin, but since the shape thereof is complicated and accuracy is required, recently, blow molding is changing to injection molding.

In injection molding, two members (or more) are divided and molded in a die-cutting relationship, and these are combined (joined) into a finished product. There are various methods for joining the divided members, such as welding and adhesion, but recently, a locking hole is formed in one of the members and a locking claw that is fitted into the locking hole is formed in the other. Since the locking structure in which the locking claw is elastically fitted into the locking hole and the joint surfaces are in close contact with each other can be quickly assembled with one touch without requiring a member for assembly or man-hours for assembling it. It is becoming popular.

[0004]

On the other hand, the resonator must be assembled to this, but this is still based on the method of fixing both by using a fixing member such as a rivet or bolts. According to this, these members and the man-hours for assembling them are required, and the fixing points must also have appropriate strengths, which further complicates the shape. The present invention has been devised in order to solve such a problem, by taking a clamping structure that clamps and fixes the resonator when joining two members of the air duct, the omission of members and the number of steps This is a reduction.

[0005]

SUMMARY OF THE INVENTION Under the above problems, the present invention provides an air duct with a resonator in which a resonator and an air duct are integrated according to claim 1, wherein the air duct is divided into two parts and molded. The present invention provides an air duct with a resonator, which is a completed product and is characterized in that the resonator and the air duct are integrated by a sandwiching structure in which the resonator is sandwiched at a joint portion.

If the resonator is sandwiched when the two members of the air duct are joined together, the air duct becomes a finished product and the resonator is attached and integrated at the same time, so that the fixing member becomes unnecessary and the number of assembling steps can be reduced.
Incidentally, the joining of the two members includes not only the locking structure described above but also welding and adhesion, but the present invention includes such joining. In this case, one of the two members of the air duct according to claim 2 is formed with a locking hole, and the other is formed with a locking claw fitted into the locking hole. According to the locking structure in which the locking claws are inevitably fitted into the stop holes to bring the joint surfaces into close contact, the number of assembling steps is further reduced.

Further, in the air duct with a resonator described above, according to the third aspect of the invention, in which the retaining portion of the resonator has a non-circular shape and has a detent structure, the resonator rotates in the air duct. However, if a protrusion is formed on the outer periphery of one of the two members of the resonator, the air duct, and the air duct described in claim 4, and a groove is formed in the other, the positioning when combining is achieved. You can expect the sealing function.

In addition to the above, the present invention has been described in claim 5.
Provided is an air duct with a resonator in which a resonator and an air duct are integrated, wherein the finished air duct and the resonator are integrated by a locking structure. If the air duct and the resonator are integrated by a locking structure, a fixing member or the like is not required, and the assembly can be easily and quickly performed. At this time, the air duct and the resonator are finished products by an appropriate method, but the method is not limited.

In addition, the present invention is as set forth in claim 6,
Provided is an air duct with a resonator in which a resonator and an air duct are integrated, wherein two parts of the air duct and the air duct and the resonator are integrated by a locking structure, respectively. The two parts of the air duct can be integrated with each other by the locking structure so that the assembly can be performed more easily and quickly, and the number of steps can be reduced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an air duct with a resonator used in an intake system of an automobile showing an example of the present invention, in which an air duct 1 is a duct body 2
Has a divergent intake port 3 formed at the front end thereof, and an exhaust port 4 following the air cleaner (not shown) formed at the rear end thereof. The duct main body 2 of this example is composed of an upper duct main body 2a and a lower duct main body 2b, which are vertically divided into two parts with respect to a long axis obtained by injection-molding a resin, and are joined together to complete a product. It is something to do.

A resonator 5 is assembled at an appropriate position of the duct body 1 and integrated with it. Although FIG. 4 is a front view of the resonator 5, the resonator 5 has a mouth part 7 protruding inward and outward on one surface of the bag-shaped resonator body 6, and the mouth part 7 communicates with the inside of the duct body 2. 8 is formed, and is formed of a resin molded product. Figure 2
FIG. 3 is a partial cross-sectional plan view of the resonator 5 and the air duct 1 in an integrated state, and FIG. 3 is a cross-sectional view taken along the line AA of FIG. The engaging holes 9 are formed in the one 2a and the other 2b, and the other 2
A locking claw 10 that is fitted into the locking hole 9 is formed in a and 2b, and a locking structure 11 that fits the locking claw 10 into the locking hole 9 so that the joint surface is in close contact is formed. .

This locking structure 11 is composed of the upper and lower duct bodies 2
In the present embodiment, the outer wall 12 is present on the outer surface of the lower duct main body 2b and the engaging holes 9 are formed vertically inside the upper duct main body 2a.
At the relevant position, a locking claw 10 having a tip end that can be inserted into the locking hole 9 formed on the arrowhead 13 is provided in a protruding manner. Then, the joining surfaces of the upper and lower duct bodies 2a and 2b are aligned, and the locking claw 10
Is inserted into the locking hole 9 while elastically deforming, and the arrowhead 13 is locked to the lower end of the outer wall 12 to prevent the arrowhead 13 from slipping upward.

At this time, the joint surface is elastically pressed to achieve close contact. Further, in this example, the protrusion 14 is formed on the joint surface of the upper duct body 2a, and the groove 15 is formed on the joint surface of the lower duct body 2b, and the protrusion 14 enters the groove 15 when joined. In this way, positioning and sealing are achieved. The upper and lower duct bodies 2a and 2b in which the protrusion 14 and the groove 15 are formed may have an opposite relationship.

On the other hand, when the resonator 5 is assembled, the retaining structure 16 in which the resonator body 6 is sandwiched by the above-mentioned joint portions.
Depends on. On the mounting surface of the resonator body 6, the base part 7
Projecting inward and outward, the outward projecting portion 7a of the base portion 7
Is sandwiched and fixed between the upper duct body 2a and the lower duct body 2b. In this case, the outward protrusion 7
A ridge 17 is formed on the outer periphery of a to form the upper and lower duct bodies 2a,
A groove 18 is formed on the holding surface of 2b (or the reverse relationship is also possible), and the projection 17 is inserted into the groove 18 for positioning and sealing.

In this case, the base portion 7 has a non-circular shape when viewed from the front, and when it is clamped by the clamping structure 16, the resonator body 6 is prevented from rotating in the duct body 1. In addition, in this example, the lower end of the base portion 7 is the lower duct body 2b.
Since it abuts on the joint surface of No. 7, the protrusion 17 is not formed (may be formed) on the outer periphery of the outer protruding portion 7a. Of course, the mouthpiece 7 may be sandwiched between the upper and lower duct bodies 2a and 2b, but even in this case, a rotation-stopping structure is necessary, and if the shape is non-circular, this is possible.

FIG. 5 is a partial cross-sectional view of an air duct with a resonator showing another example of the present invention.
The completed air duct 1 and the resonator 5 are used, and the resonator body 6 is integrated with the duct body 2 by the locking structure 13 described above. When a completed product is used for the air duct 1 before mounting the resonator 5 as described above, there is an advantage that the mounting surface of the resonator 5 can be mounted regardless of the mold dividing direction of the air duct 1. The air duct 1
As a method of manufacturing the finished product of the resonator 5 and the resonator 5, it is possible to use a method integrally processed by blow molding or the like, or a method such as welding, adhesion or fastening using component members molded separately.

FIG. 6 is also a partial sectional view of an air duct with a resonator showing another example of the present invention.
The duct body 2 of the air duct 1 is composed of the upper and lower ducts 2a and 2b as described above, and the upper and lower ducts 2
The joints a and 2b and the resonator body 6 are integrated by the locking structure 13, respectively. Since the air duct 1 can be assembled by joining and the resonator 5 can be integrated at the same time, there is an advantage that the number of assembling steps can be reduced.

[0018]

As described above, according to the present invention, since the air duct and the resonator are integrated with each other by the sandwiching structure, the fixing member and the assembling man-hour are not required, and the manufacturing cost can be greatly reduced. . In this case, if the air duct is a completed product by joining the two members and is assembled with the locking structure of the locking hole and the locking claw, the number of assembly steps can be further reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an air duct with a resonator showing an example of the present invention.

FIG. 2 is a partial cross-sectional plan view of an air duct with a resonator showing an example of the present invention.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a front view of a resonator showing an example of the present invention.

FIG. 5 is a cross-sectional view of an essential part of an air duct with a resonator showing another example of the present invention.

FIG. 6 is a cross-sectional view of a main part of an air duct with a resonator showing another example of the present invention.

[Explanation of symbols]

1 air duct 5 Resonator 9 locking holes 10 locking claws 11 Locking structure 14 ridges 15 grooves 16 pinching structure 17 ridges 18 grooves

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[Procedure amendment]

[Submission date] February 28, 2002 (2002.2.2)
8)

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (6)

[Claims] 1. In an air duct with a resonator in which a resonator and an air duct are integrated, the air duct is divided into two members to be molded into a finished product, and the resonator and the air duct are sandwiched by a joint structure to sandwich the resonator. Air duct with resonator characterized by being integrated. 2. An air duct, wherein one of the two members of the air duct is formed with a locking hole, and the other of the air duct is formed with a locking claw that is fitted into the locking hole. The air duct with a resonator according to claim 1, wherein the air duct is a completed product by a locking structure that is fitted into the joint surface so as to be closely fitted. 3. The air duct with a resonator according to claim 1 or 2, wherein the retaining portion of the resonator is non-circular and has a rotation preventing structure. 4. The air duct with a resonator according to claim 1, wherein a protrusion is formed on the outer periphery of one of the two members of the resonator, the air duct and the air duct, and a groove into which this protrusion is inserted is formed on the other member. 5. An air duct with a resonator in which a resonator and an air duct are integrated, wherein the finished air duct and the resonator are integrated by a locking structure. 6. An air duct with a resonator in which a resonator and an air duct are integrated, wherein two parts of the air duct and the air duct and the resonator are integrated by a locking structure.