JPH09151818A - Hose having resonator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hose, having a resonator, to reduce the number of parts and the number of assembly works and be further simple. SOLUTION: A hose having a resonator comprises a hose 1 having a cylindrical hose body 11 and a branch cylindrical part 12; and a hose having a resonator 2 consisting of a container part 21 and a fit-in cylinder part 22. The hose 1 is formed of a rubber elastic material and has at least two first engaging parts 13 and has at least two first engaging parts 13 protruded from an outer peripheral surface with which the branch cylinder part 12 is surrounded. A resonator 2 is formed of a resin more rigid than a rubber elastic material and the outer peripheral surface of the fit-in cylinder part 22 has at least one flange-form seal part making contact with the inner peripheral surface of the branch cylinder part 12, and at least two second engaging parts protruded from the outer peripheral surface in such a manner to surround the fit-in cylinder part and engaged with the respective engaging parts. Thus, it comprises with two parts of the hose and the resonator and the minimum number of parts and the number of assembly works is low, whereby the hose is extremely simply manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose having a resonator which is provided in an intake passage of a vehicle and reduces intake noise.

[0002]

2. Description of the Related Art A hose having a resonator utilizing the Helmholtz resonance principle is attached to an intake air passage of an automobile engine or an air intake passage of an air conditioner to reduce intake noise of a specific frequency. As shown in FIG. 5, this conventional hose having a resonator has openings 110 at both ends.
a tubular hose body 110 having a and 110a, and a branch tubular portion 120 that is integrally formed with the hose body 110 and defines a communication passage 120a that communicates with the shaft hole 100a of the hose body 110 and has the other end opened. The hose 100 having the container part 210 for partitioning the internal space 200a and the container part 210
And a fitting tubular portion 220 that is integrally formed with the branching tubular portion 120 and forms a through hole 220a that communicates with the internal space 200a, and is fastened with a clamp 300 to the hose 100. It has a resonator 200.

[0003]

The above-mentioned conventional hose having a resonator requires the hose 100, the resonator 200, and the clamp 300, and has a large number of parts and a large number of assembly steps. The present invention has been made in view of such circumstances, and an object thereof is to provide a hose having a simpler resonator with a smaller number of parts and a smaller number of assembly steps.

[0004]

A hose having a resonator according to the present invention, which solves the above-mentioned problems, has a cylindrical hose body having openings at both ends, and a shaft hole formed integrally with the hose body. A hose having a branching cylinder portion that communicates with the other end and defines a communication passage, a container portion that defines an internal space, and a through hole that is integrally formed with the container portion and that communicates with the internal space. A hose having a resonator comprising a fitting tube part that is inserted into and fitted into the branching cylinder part, the hose being made of a rubber elastic material and projecting at least on an outer peripheral surface surrounding the branching cylinder part. The resonator has two first engaging portions, and the resonator is made of a resin harder than the rubber elastic material, and the ring-shaped tip surface of the fitting cylindrical portion has an outer peripheral surface of the branch cylindrical portion. A small number of turns around the outer peripheral surface of the fitting tubular portion that contacts the inner peripheral surface Both have one flange-shaped seal portion, and the container portion has at least two second engaging portions that protrude so as to surround the fitting tubular portion and that each engage with the first engaging portion. Characterize.

A hose having this resonator is composed of two parts, a hose and a resonator, and a fitting tubular portion of the resonator is attached to a branch tubular portion of the hose so that a first engaging portion of the hose and a second engaging portion of the resonator. It can be assembled in two assembly man-hours for engaging and.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A hose is made of rubber elastic material such as rubber or thermoplastic elastomer because it requires vibration damping and flexibility. On the other hand, the resonator is made of a thermoplastic resin such as polyethylene and polypropylene which is harder than the rubber elastic material because it requires rigidity.

A ring-shaped groove may be provided on the inner peripheral surface of the branching tubular portion of the hose so that the flange-shaped sealing portion of the fitting tubular portion of the resonator abuts. This further improves the sealing property. One of the first engaging portion and the second engaging portion has an engaging through hole, and the other of the first engaging portion and the second engaging portion has a tip portion penetrating into the engaging through hole. It is preferable to have a hook portion to be locked. In particular, it is desirable that the first engaging portion has an engaging through hole and the second engaging portion has a hook portion with which the tip portion penetrates and is engaged with the engaging through hole. In this case, the hook portion projects in the circumferential direction coaxially with the fitting tubular portion, and the hook portion is engaged by rotating the hose and the resonator relative to each other with the fitting tubular portion inserted in the branch tubular portion. It is preferable to insert and lock the through hole.

[0008]

In the hose having the resonator of the present invention,
Assembly is completed by inserting the fitting tubular portion of the resonator into the branch tubular portion of the hose and engaging the first engaging portion of the hose with the second engaging portion of the resonator. When inserting the fitting tube into the branch tube, the branch tube is made of a soft rubber elastic material and the fitting tube is made of hard resin. The tubular portion is expanded and the fitting tubular portion is easily inserted and inserted. And the ring-shaped tip of the flange-shaped seal portion of the fitting cylinder portion press-deforms the inner peripheral surface of the branch cylindrical portion, and the flange-shaped seal portion and the inner peripheral surface of the branch cylindrical portion contact without a gap,
The branch cylinder and the fitting cylinder are reliably sealed.

Also, the first engaging portion and the second engaging portion can be easily engaged with each other by the combination of the hard resin forming the resonator and the soft rubber elastic material forming the hose.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 to 4 show a hose having a resonator according to an embodiment of the present invention. The hose having this resonator is composed of a hose 1 and a resonator 2. The hose 1 is made of injection-molded vulcanized rubber and communicates with a cylindrical hose body 11 having openings 11a, 11a at both ends and a shaft hole 1a of the hose body 11 which is integrally formed with the hose body 11. Communication path 12a with the other end open
And a total of two first engaging portions 13 projecting from the outer peripheral surface of the hose body 11, one on each side of the branch cylindrical portion 12. The first engaging portions 13 are plate-like plates extending in the axial direction and having a mountain shape having a substantially constant thickness, and have an engaging hole 13a at the center thereof.

The resonator 2 is made of polypropylene resin which is harder than a rubber elastic material, and is formed integrally with the container portion 21 that defines the internal space 2a and the internal space 2a.
A branch hole 11a is formed to communicate with
It has a fitting tubular portion 22 that is inserted and fitted into the container, and two second engaging portions 23 that project from the outer peripheral surface of the container portion 21 so as to surround the fitting tubular portion 22.

On the outer peripheral surface on the tip side of the fitting tubular portion 23, there are provided two flange-shaped seal portions 221 and 221 which are arranged at intervals in the axial direction around the outer peripheral surface. Further, the second engaging portion 23 projects from the outer peripheral surface of the container portion 21 in parallel with the projecting direction of the fitting tubular portion 22, where the second engaging portion 23 bends and extends in the circumferential direction of the fitting tubular portion 22, and has a head portion 231 at the tip. Formed as a hook.

A hose having this resonator is a hose 1
The fitting tubular portion 22 of the resonator 2 is inserted into the communication passage 12a of the branch tubular portion 12. The outer peripheral diameter of the fitting tubular portion 22 is slightly larger than the inner peripheral diameter of the branch tubular portion 12, and the outer peripheral diameters of the ring-shaped tips of the flange-shaped seal portions 221 and 221 of the fitting tubular portion 22 are formed to be even larger. There is. The fitting cylinder portion 22 is inserted and inserted into the communication passage 12a while expanding the communication passage 12a of the branch cylinder portion 12. The diameter of the branch cylinder 12 is expanded by the fitting cylinder 22, and the branch cylinder 12 sticks to the outer peripheral surface of the fitting cylinder 22 so as to tighten the outer peripheral surface of the inserted cylinder 22 by elastic recovery based on the rubber elasticity. As a result, the inner peripheral surface of the branch cylindrical portion 12 and the outer peripheral surface of the fitting cylindrical portion 22 are reliably sealed.

In this state, the hose 1 and the resonator 2 rotate relative to each other, and the head 23 of the second engaging portion 23 that forms a hook.
1 is inserted into the engaging hole 13a of the first engaging portion 13 of the hose 1. The engagement hole is expanded by the flexibility of the rubber, and the second engagement portion 2
3 head 231 is inserted. When the head 231 is inserted, the engagement hole 13a contracts due to rubber elasticity, and the second engagement portion 23
Is locked to the shaft part of. The relative rotation between the hose 1 and the resonator 2 is prevented by the engagement of the two sets of the first engaging portion 13 and the second engaging portion 23, and the fitting tubular portion 22 of the resonator 2 and the branch tubular portion 12 of the hose 1 are blocked. Axial relative movement with and is prevented. This state is shown in FIGS. 3 and 4. 3 and 4 correspond to the sectional view taken along the line AA and the sectional view taken along the line BB of FIG.

As a result, the hose 1 and the resonator 2 are fixed, and the hose having the resonator is completed. The hose having the resonator of the present embodiment has only two parts, the hose 1 and the resonator 2, and the assembling work includes the work of inserting the fitting cylinder portion 22 into the branch cylinder portion 12, the hose 1 and the resonator 2. And are relatively rotated, and the head 2 of the second engaging portion 23
It is two operations of inserting 31 into the engaging hole 13a of the first engaging portion 13. Since the number of parts is small and the assembling work is small as described above, the hose having the resonator of this embodiment can be manufactured very easily.

In this embodiment, the first engaging portion and the second engaging portion are formed as engaging holes and hooks, but various other commonly used engaging means can be adopted.

[0017]

EFFECT OF THE INVENTION The hose having the resonator of the present invention is composed of two parts of the hose and the resonator and the minimum number of parts, and the assembling work is small, so that the hose can be manufactured very easily.

[Brief description of the drawings]

FIG. 1 is a partially broken front view of a hose having a resonator according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view schematically showing an assembled state of the resonator and the hose of the embodiment of the present invention.

FIG. 3 is a sectional view taken along the line AA of FIG. 1;

FIG. 4 corresponds to a sectional view taken along the line BB of FIG.

FIG. 5 is a partially broken front view of a conventional hose having a resonator.

[Explanation of symbols]

1 ... Hose 2 ... Resonator 1a ... Shaft hole
2a ... internal space 11 ... hose main body 11a ... opening 12 ... branching cylindrical portion 12a ... communication passage 13 ... first engaging portion 13a
... Engagement hole 21 ... Container part 22 ... Fitting cylinder part 22a
... through hole 23 ... second engaging portion 231 ... head portion

Claims (4)

[Claims] 1. A tubular hose main body having openings at both ends, and a branch tubular portion which is integrally formed with the hose main body and which communicates with a shaft hole of the hose main body and defines a communication passage opening at the other end. A resonator comprising a hose, a container section that defines an internal space, and a fitting tube section that is integrally formed with the container section and that forms a through hole that communicates with the internal space and that is inserted into and fitted into the branch tube section. Wherein the hose is made of a rubber elastic material and has at least two first engaging portions projecting from an outer peripheral surface surrounding the branch cylindrical portion, and the resonator is made of the rubber elastic material. It is made of a resin harder than a material, and the ring-shaped tip end surface of the outer peripheral surface of the fitting cylinder portion makes a round around the outer peripheral surface of the fitting cylinder portion in contact with the inner peripheral surface of the branch cylinder portion. It has at least one flange-shaped seal part, and the container part surrounds the fitting cylinder part. Hose with resonator, characterized in that with at least two second engaging portions engage with each first engaging portion protrudes. 2. A hose having a resonator according to claim 1, wherein a ring-shaped groove with which said flange-shaped seal portion abuts is provided on the inner peripheral surface of said branch cylinder portion. 3. One of the first engaging portion and the second engaging portion has an engaging through hole, and the other of the first engaging portion and the second engaging portion has the engaging through hole. The hose with a resonator according to claim 1, wherein the hose has a hook portion through which a tip portion is penetrated and locked. 4. The second engaging portion has the hook portion, and the hook portion projects in the circumferential direction coaxially with the fitting cylinder portion, and the fitting cylinder portion is inserted into the branch cylinder portion. The hose with a resonator according to claim 3, wherein the hook portion is inserted and locked in the engaging through hole by relatively rotating the hose and the resonator in a worn state.