JPH08232788A - Resin-made intake manifold - Google Patents

Abstract

PURPOSE: To prevent any damage from taking place in the connection part between both divided manifold pieces, in the case of resin-made intake manifold formed by connecting together a pair of divided manifold pieces. CONSTITUTION: Divided manifold pieces 1, 2 provided with flanges 8, 14 through which penetration holes 10, 13 are formed, are brought in contact with each other at connection parts 6, 11. Both divided manifold pieces 1, 2 are connected together by unitedly depositing the outer peripheral surfaces 16, 17 of the connection parts 6, 11 and flanges 8, 14 by means of a connection member 3. Then, both divided manifold pieces can be connected together firmly by integrally forming the sectionally one-side opened square type long member 18 and the pin member 15 of the connection member 3 by means of injection molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin intake manifold for an internal combustion engine.

[0002]

2. Description of the Related Art As a conventional resin intake manifold, a half-divided manifold on one side having a flange and a half-divided manifold on the other side having a flange are provided. A device sandwiched between members is known (see Japanese Patent Laid-Open No. 63-277851).

[0003]

However, like the conventional resin intake manifold described above, if the flanges of both manifold divisions are sandwiched by U-shaped elongated members and the two manifold divisions are joined together, the resin intakes will be joined. When vibration is applied to the manifold, the stress caused by the vibration is concentrated on the outer peripheral side of both flange joints of the U-shaped long member, and the joint of the resin intake manifold is easily damaged. . Then, this invention is made | formed in order to eliminate the said problem, and an object of this invention is to provide the resin-made intake manifold in which the joint part of a resin-made intake manifold is hard to be damaged.

[0004]

[Means for Solving the Problems] In order to solve the above problems,
The resin intake manifold according to claim 1 comprises a half-divided one-side manifold split piece having a flange and a half-divided other-side manifold split piece having a flange, and the both flanges are U-shaped long members. In the sandwiched resin intake manifold, pin members penetrating the both flanges are connected to opposite sides of the U-shaped elongated member. A resin intake manifold according to a second aspect is characterized in that the pin member and the U-shaped elongated member according to the first aspect are integrally formed by injection molding.

Materials for forming the pin member and the U-shaped elongated member are not particularly limited. However, when both members are integrally formed by injection molding, both members are preferably welded and integrated. Preferably, and the manifold segment are formed of the same material. For example, 6-nylon, 6-6
If the manifold division pieces are formed of polyamide such as nylon or aromatic polyamide, it is preferable to use a polyamide resin for both members, and the manifold division pieces are formed of a polyolefin resin such as polyethylene or polypropylene. For example, it is preferable to use a polyolefin resin for both the members. Incidentally, when the both members are integrally formed by injection molding, as the material used for both the members, in addition to the above-mentioned polyamide resin, polyolefin resin, polyester resin such as polyethylene terephthalate, polybutylene terephthalate, polystyrene,
It may be a polyacetal, a polycarbonate, a polyphenylene sulfide, a polymer alloy of various resins, or a composite material having a synthetic resin thereof as a base material. In the case of using the composite material, for example, inorganic particles, inorganic fibers such as glass fibers and carbon fibers, or organic fibers such as aramid fibers can be used as the reinforcing material.

The position at which the pin member is arranged is not particularly limited, and it may be arranged in the entire region of the flange, or it may be arranged in any region of the flange, for example, only in the region where the joining strength is particularly required. May be.

[0007]

In the resin intake manifold according to the first aspect of the present invention, by connecting the pin member and the U-shaped elongated member and joining the two manifold divided pieces, the displacement and separation between the two manifold divided pieces are restrained. It In the resin intake manifold according to claim 2, by forming the pin member and the U-shaped elongated member integrally by injection molding, the two manifold divided pieces, the pin member and the U-shaped elongated member are formed. By welding with a large welding area, the manifold division pieces and the both members are firmly coupled, and the displacement and separation constraint between the manifold division pieces becomes stronger.

[0008]

Embodiments of the present invention will be described below with reference to FIGS. (Example 1) In the resin intake manifold of this example, the one-side manifold divided piece and the other-side manifold divided piece were joined by a pin member integrally formed by injection molding and a U-shaped elongated member. It is a thing.

As shown in FIG. 1, the resin intake manifold is provided with a half-divided manifold piece 1 on one side and a half-divided piece 2 on the other side of the manifold. Are joined together. The intake port side flange 4 of the resin intake manifold is formed integrally with the other side manifold split piece 2, and the one side manifold split piece 1 is formed so as to be joined to the rear surface of the flange 4.

As shown in FIGS. 2 and 3, the one-side manifold split piece 1 has a half-split body 5 having a U-shaped cross section and a half-split along the edge of the joint portion 6 at the side end of the half-split body 5. It is formed by a bottom portion 7 of the body 5 and a flange 8 formed in parallel and outward. At the tip of the flange 8, a hook-shaped portion 9 protruding in a hook shape is formed on the half-divided body 5 side of the half-divided body 5, and a cylindrical through hole 10 is formed at a predetermined position of the flange 8. There is. Further, as shown in FIG. 4, the joining portion 11 edge of the other-side manifold split piece 2 has the same shape as the joining portion 6 edge of the one-side manifold split piece 1,
A flange 14 having a hook portion 12 and a through hole 13 is provided.

As shown in FIG. 4, at the portion where the one-side manifold split piece 1 and the other-side manifold split piece 2 are joined, the joint portion 6 and the joint portion 11 are in contact with each other, and the flange 8 is formed.
And the flange 14 come into contact with each other, and the two divided pieces 1 and 2 are joined by the joining member 3. The joining member 3 includes a pin member 15 formed by filling the through holes 10 and 13 of the flanges 8 and 14, and the outer peripheral surface 16 of the flanges 8 and 14 and the joining portion 6.
U-shaped elongated member 18 that covers the outer peripheral surface 17 of the joining portion 11
And are integrally formed by injection molding. The U-shaped elongated member 18 includes a top portion 21 that covers the top surface 19 of the flange 8 and the top surface 20 of the flange 14, and the outer peripheral surfaces 16 and 1 extending from both ends of the top portion 21 along the shapes of the flanges 8 and 14.
7 and the arm 22. The inside of the top side end of the arm portion 22 has a shape along the hook-shaped portions 9 and 12, and the pin member 15 and the arm portion 22 of the U-shaped elongated member 18 are integrally connected.

Next, the operation will be described. By integrally forming the pin member 15 and the U-shaped elongated member 18 by injection molding on the peripheral edges of the flanges 8 and 14 of the manifold divided pieces 1 and 2, the members 15 and 18 are based on their shapes. While restraining the displacement and separation between the two manifold divided pieces 1 and 2, both the members 15 and 18 and the two manifold divided pieces 1 and 2 are welded, and the two manifold divided pieces 1 and 2 are firmly joined.

(Embodiment 2) In the resin intake manifold of this embodiment, the one-side manifold divided piece and the other-side manifold divided piece are joined by a U-shaped long member and a pin member which are separately formed. It was done. This embodiment has the same configuration as that of the above-described Embodiment 1 except that the U-shaped elongated member and the pin member are separately formed. Therefore, in the following, one side manifold split piece and the other side manifold split piece will be described. Only the joint portion with the piece will be described.

As shown in FIG. 5, at the portion where the one-side manifold split piece 31 and the other-side manifold split piece 32 are joined, the joint portion 33 and the joint portion 34 abut, and the flange 35 and the flange 36 are joined. And the manifold divided pieces 31 and 32 are joined by the joining member 37. The joining member 37 is formed of a pin member 38 and a U-shaped elongated member 40 having through holes 39 into which the pin member 38 can be inserted and which faces each other. In addition, the flange 35,
A through hole 41 into which the pin member 38 can be inserted is formed in 36. In both of the manifold divided pieces 31 and 32, the U-shaped long member 40 sandwiches the flanges 35 and 36, and the pin member 3 is formed.
8 is a through hole 39 and a flange 35 of the U-shaped long member 40,
The through holes 41 of 36 are fitted and joined.

Next, the operation will be described. Pin member 38
Through the through holes 41 of the flanges 35 and 36 and the U-shaped long member 4
By fitting and inserting into the through hole 39 of 0, the displacement and separation between the manifold divided pieces 31 and 32 are restrained, and the manifold divided pieces 31 and 32 are firmly joined.

[0016]

According to the present invention, the pin member and the U-shaped elongated member are integrally connected to each other, so that the pair of manifold divided pieces are firmly joined to each other and cracks are less likely to occur at the joined portion. As a result, the reliability of the product is improved, and the flange can be made smaller, so that the weight can be reduced. Further, by integrally molding the pin member and the U-shaped long member by injection molding on the peripheral edges of the flanges of the two manifold divided pieces, the joining force between the two divided bodies can be further strengthened and the production efficiency can be improved. Can be planned.

[Brief description of drawings]

FIG. 1 is a perspective view of a resin intake manifold according to an embodiment of the present invention.

FIG. 2 is a partial plan view of a one-side manifold split piece forming a resin intake manifold.

FIG. 3 is a cross-sectional perspective view of the one-side manifold split piece.

FIG. 4 is an enlarged view of a cross section of a joint portion of a resin intake manifold.

FIG. 5 is an enlarged view of a cross section of a joint portion of a resin hollow body different from the above embodiment.

[Explanation of symbols]

 1 Manifold split piece 2 Other manifold split piece 8 Flange 14 Flange 15 Pin member 18 U-shaped long member

Claims (2)

[Claims] 1. A resin intake manifold comprising a half-divided half-manifold divided piece having a flange and a half-divided other manifold divided piece having a flange, wherein both flanges are sandwiched by a U-shaped elongated member. In the resin intake manifold, a pin member penetrating both the flanges is connected to opposite surfaces of the U-shaped elongated member. 2. The resin intake manifold according to claim 1, wherein the pin member and the U-shaped elongated member are integrally formed by injection molding.