JPH0925858A - Rubber hose fitting structure of intake manifold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily fit a rubber hose in the fitting hole of an intake manifold by reducing the number of parts and the number of assembling steps and securing a good sealing ability. SOLUTION: An engaging part 4A engaged with the fitting hole 2 of an intake manifold 1 is provided in the tip side outer periphery of a rubber hose 4. This engaging part 4A is composed of a pair of external projections 5a and 5b formed at a interval smaller than the length L1 of the fitting hole 2 and a plurality of inner projections 6 formed between the external projections 5a and 5b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting a rubber hose on an intake manifold.

[0002]

2. Description of the Related Art Conventionally, an intake intake hole 1a is formed on the upper surface side of an intake manifold 1 as shown in FIG. 8, and a mounting hole 2 is formed in the side surface of the intake manifold 1 in advance. When the rubber hose 4 is attached to the mounting hole 2, the connector 3 is press-fitted into the mounting hole 2 from the outside in advance, as shown in FIG. Through the rubber hose 4, the connector 3 and the mounting hole 2 to form a passage for taking in the circulating gas or taking out the negative pressure.

In such a conventional mounting structure of the rubber hose 4 to the intake manifold 1, the connector 3
The number of man-hours for press-fitting the connector 3 is increased, and the mounting portion of the intake manifold 1 and the connector 3 and the mounting portion of the connector 3 and the rubber hose 4 are not required.
There was a problem that the sealability of the part had to be secured.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems of the prior art, and provides a mounting structure for mounting a rubber hose to an intake manifold while ensuring good sealability without requiring a connector. For the purpose of not providing, the gist thereof is a mounting structure for mounting a rubber hose in a mounting hole penetratingly formed in an intake manifold, and an engaging portion which is elastically engaged with the outer periphery of the tip end side of the rubber hose in the mounting hole. And the engagement portion is formed between the pair of outer protrusions that are elastically attached to both end opening sides of the mounting holes that are formed at intervals smaller than the length of the mounting hole. It is composed of a plurality of inner projections that are elastically attached to the inner peripheral surface of the mounting hole.

[0005]

The engagement portion formed on the tip end side of the rubber hose has a pair of outer protrusions and a plurality of inner protrusions formed therebetween, and the engagement portion is elastically engaged with the mounting hole of the intake manifold. In this state, the pair of outer projections are elastically attached to both ends of the mounting hole to close the opening, and the plurality of inner projections are tightly attached to the inner peripheral surface of the mounting hole. It is possible to secure a good sealing property, eliminate the need for a conventional connector, reduce the number of parts, and satisfactorily attach a rubber hose.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the intake manifold 1 in FIG.
2A is an enlarged cross-sectional view taken along line AA of FIG. 1B, and the cross section of the rubber hose 4 that is attached to the attachment hole 2 of the intake manifold 1 in an inserted manner is shown in an exploded manner.

In the drawing, a mounting hole 2 is formed in a side wall surface of the intake manifold 1 in a penetrating manner, and a chamfered seating surface 2a is formed in a chamfered shape on the outer opening side of the mounting hole 2. The inner peripheral surface of No. 2 is formed with good surface accuracy. On the other hand, an engaging portion 4A is formed on the outer periphery of the tip end side of the rubber hose 4 that is inserted into the attachment hole 2 and the engaging portion 4A includes a pair of outer protrusions 5a and 5b. The outer projection 5a is formed by a plurality of inner projections 6, 6, 6 formed between the pair of outer projections 5a, 5b, and the outer projection 5a projects slightly inward from the tip of the rubber hose 4 toward the outer peripheral direction. The outer protrusion 5b on the other side is also formed to have the same protrusion length as the outer protrusion 5a. Further, the plurality of inner protrusions 6 are formed so that the protruding length thereof is shorter than that of the pair of outer protrusions 5a and 5b.

The outer diameter dimension d2 of the rubber hose 4 is smaller than the inner diameter dimension d1 of the mounting hole 2 so that the rubber hose 4 itself can be easily loosely inserted into the mounting hole 2. There is. Further, the inner protrusion 6 is formed to have a protruding length such that it is elastically attached to the inner peripheral surface of the mounting hole 2 when inserted into the mounting hole 2, and the outer protrusion 5
The a and 5b are projected to have an outer diameter that is considerably larger than the inner diameter of the mounting hole 2, and are formed to have an outer diameter that allows them to be elastically attached to the chamfered seating surface 2a. In addition, the pair of outer projections 5
The distance L2 between the a and 5b is formed to be shorter than the length L1 of the mounting hole 2.

When the rubber hose 4 having the engaging portion 4A formed on the distal end side thereof is mounted in the mounting hole 2 of the intake manifold 1, first, as shown in FIG. The tip portion of the rubber hose 4 opposite to the engaging portion 4A is inserted into the intake hole 1a, and the tip portion is loosely inserted into the mounting hole 2 in this state. In this state, attach the end of the rubber hose 4 to the mounting hole 2
As shown in FIG. 3, the outer protrusion 5b forming the engaging portion 4A of the rubber hose 4 is pulled out to the outside of the mounting hole 2 as shown in FIG.
When the rubber hose 4 is further pulled out to the outside of the mounting hole 2 in this state, the outer projection 5b elastically deforms and fits into the mounting hole 2 as shown in FIG. Further, when the rubber hose 4 is pulled out further in this state, the outer projection 5b and the inner projection 6 pass through the inside of the mounting hole 2 as shown in FIG. It comes into contact with the inner open end of No. 2. Outer protrusion 5a
The distance between the outer projection 5b and the outer projection 5b is formed shorter than the length L1 of the mounting hole 2, but in this state, the outer projection 5b extends due to elastic deformation, and the outer projection 5b is located outside the chamfered seating surface 2a. When the pulling force is stopped in this state, as shown in FIG. 7, the rubber hose 4 contracts to its original state due to the elastic force, and the outer protrusion 5b elastically adheres to the chamfered seating surface 2a, and the other side The outer protrusion 5a of the above is elastically attached to the inner open end of the mounting hole 2. In this state, the plurality of inner protrusions 6 are in close contact with the inner peripheral surface of the mounting hole 2 due to elasticity, and if the inner peripheral surface of the mounting hole 2 has good surface accuracy, the inner protrusions 6 are firmly attached. The state is in close contact with the inner peripheral surface of 2, and good sealing properties are secured.

In this way, the plurality of inner protrusions 6 are elastically attached to the inner peripheral surface of the mounting hole 2 in a close contact manner to secure the sealing property, and the distance L2 between the pair of outer protrusions 5a and 5b is set to the mounting hole 2 Since the outer protrusion 5a is formed to be shorter than the length L1 of the mounting hole 2 by elasticity, the outer protrusion 5a is elastically adhered to the inner open end of the mounting hole 2, and the outer protrusion 5b on the other side is elastically adhered to the chamfered seating surface 2a. It is attached, and good sealing property is secured.

[0011]

The present invention is a mounting structure for mounting a rubber hose in a mounting hole penetratingly formed in the intake manifold, and an engaging portion which is elastically engaged in the mounting hole is provided on the outer periphery of the tip end side of the rubber hose. The engaging portion has a pair of outer protrusions that are elastically attached to the opening sides of both ends of the mounting hole formed with a smaller dimension than the length of the mounting hole, and the mounting hole formed between the pair of outer protrusions. Since it is composed of multiple inner projections that are elastically attached to the inner peripheral surface of the, it does not require the conventional connector, reduces the number of parts and assembly work, and is formed directly on the tip side of the rubber hose. The engaging portion can be elastically engaged in the mounting hole by utilizing its elasticity, and in the engaged state, the pair of outer projections elastically adhere to the opening sides of both ends of the mounting hole to provide sealing property. Secure, and multiple inner projections are The sealing property can be assured that by Tamagi to Jo. Further, since the connector is not required, it is not necessary to secure a space for mounting the connector, and there is a secondary effect that the rubber hose can be easily arranged in the engine room.

[Brief description of drawings]

FIG. 1 is an exploded cross-sectional configuration diagram of an intake manifold and a rubber hose.

FIG. 2 is a cross-sectional configuration diagram showing a state in which a rubber hose is inserted from the intake intake hole side of the intake manifold.

FIG. 3 is a cross-sectional configuration diagram showing a state in which an engagement portion of a rubber hose is in contact with an inner side of a mounting hole.

FIG. 4 is a cross-sectional configuration diagram showing a state in which a rubber hose is further pulled outward.

FIG. 5 is a cross-sectional configuration diagram showing a state in which a rubber hose is further pulled out to the outside.

FIG. 6 is a cross-sectional configuration diagram in which a pulling force is further applied to the rubber hose.

FIG. 7 is a cross-sectional configuration diagram showing a state in which elastic attachment to a mounting hole of a rubber hose is completed.

FIG. 8 is a perspective configuration diagram showing a state where a rubber hose is attached to a conventional intake manifold.

FIG. 9 is a cross-sectional configuration diagram of a conventional mounting structure.

[Explanation of symbols]

 1 intake manifold 1a intake air intake hole 2 mounting hole 2a chamfered seating surface 4 rubber hose 4A engaging part 5a, 5b outer protrusion 6 inner protrusion

Claims (1)

[Claims] 1. A mounting structure for mounting a rubber hose in a mounting hole penetratingly formed in an intake manifold, wherein an engaging portion that is elastically engaged in the mounting hole is provided on an outer periphery of a tip end side of the rubber hose. The portion is a pair of outer protrusions that are elastically attached to the opening sides of both ends of the mounting hole formed at intervals smaller than the length of the mounting hole, and an inner peripheral surface of the mounting hole formed between the pair of outer protrusions. A rubber hose mounting structure for an intake manifold, which is composed of a plurality of inner projections that are elastically attached to the.