JPS6011347Y2 - Engine intake passage joint structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint structure for a soft pipe that constitutes an intake passage of an engine.

Generally, if there is no vertical space in the engine compartment or if you want to lower the bonnet as much as possible, install an air cleaner on the vehicle body and connect the air cleaner to the intake manifold fixed to the engine using a soft pipe (hose) made of rubber or resin. There are some that form an intake passage.

For example, if the above-mentioned intake passage is made of a rubber hose that absorbs engine vibrations, and if the shape of the passage becomes complicated due to space constraints, the above-mentioned intake passage can be constructed with a resin pipe that can be easily molded into a complicated passage shape and is lightweight. In a joint between a rubber hose and a resin pipe, the end of the resin pipe is fitted into the end of the rubber hose, and the fitting portion is tightened from the outside with a fastening band to fasten the rubber hose and the resin pipe.

However, since the rubber hose and resin pipe are made of soft materials, there is a problem in that tightening with a fastening band sometimes deforms the resin pipe and deforms the intake passage.

In view of the above-mentioned problems, the present invention has been proposed by fitting the end of a first soft pipe (resin pipe) and the end of a second soft pipe (rubber hose) constituting the intake passage of the engine, and A reinforcing ring inscribed in the end of either one of the soft pipes inserted into the engine prevents the soft pipe from being deformed and the intake passage when the fitting part is tightened from the outside. This provides an intake passage joint structure.

In order to achieve the above purpose, the first
A reinforcing ring is provided inscribed in the end of the soft pipe, a pair of ends are formed by cutting out the reinforcing ring, and a reinforcing ring of the pair of ends is provided inside the reinforcing ring. A blocking member is provided to prevent overlap in the radial direction.

Specifically, the blocking member is a pair of enlarged retaining portions formed by bending the pair of end portions inside the reinforcing ring, or is provided inside the reinforcing ring and extends in the radial direction of the reinforcing ring at the pair of end portions. It is composed of a guide plate that guides one end to the other end while regulating the movement of the end.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the intake passage of an engine to which the intake passage joint structure of the present invention is applied, 1 is an air cleaner made of iron plate and equipped with a connecting passage 1a and attached to the vehicle body, 2 is an engine (
The intake manifold is made of metal casting and is fixed to the engine (not shown) and supplies intake air to each cylinder of the engine. It is composed of a first soft pipe 3 made of resin, for example polypropylene, and a second soft pipe 4 made of rubber, and one end of the first soft pipe 3 is fitted into the outer periphery of the connection passage 1a. - The universal end is inserted into one end of the second soft pipe 4 and is tightened by the fastening band 6.

Furthermore, the other end of the second soft pipe 4 is fitted onto the outer periphery of the end of the intake manifold 2 and is tightened and fastened by a fastening band 7.

FIG. 2 is a sectional view of a main part showing the joint structure of the first soft pipe 3 and the second soft pipe 4 shown in FIG. The first tube is inserted into the end portion 4a of the soft pipe 4 for a predetermined length, and is inserted into the end portion 4a of the soft pipe 4.
Inside the end 3a of the soft pipe 3 is a metal reinforcing ring 8.
is inscribed and provided.

A fastening band 6 is attached to the outer periphery of the end 4a of the second soft pipe 4.
is arranged, and the second soft pipe 4 is connected by the fastening band 6.
In other words, the end portion 4a of the first soft pipe 3 is tightened.
The first soft pipe 3 and the second soft pipe 4 are fastened by tightening the fitting portion where the end 3a of the soft pipe 4 and the end 4a of the second soft pipe 4 are fitted.

FIG. 3 shows a perspective view of the reinforcing ring 8, and as shown in the figure, the reinforcing ring 8 has a pair of opposing end portions 8a and 8b formed by cutting out in the axial direction X of the ring 8. The end portions 8a and 8b are bent inside the reinforcing ring 8 to form a pair of enlarged engaging portions 8c and 8d.

The engaging portions 8c and 8d are arranged with a predetermined gap between them.

This is because when the reinforcing ring 8 is provided inscribed in the end 3a of the first soft pipe 3, variations in the inner diameter of the end 3a of the first soft pipe 3 due to manufacturing errors can be prevented between the gaps. The outer diameter of the reinforcing ring 8 can be reduced by moving the joining parts 8c and 8d, respectively, so that the outer diameter of the reinforcing ring 8 can be reduced.
can be reliably provided inscribed within the end portion 3a.

Further, the pair of engaging parts 8c and 8d abut and engage with each other when the fitting part is tightened with the fastening band 6, so that the ends 8a and 8b of the reinforcing ring 8 are securely connected to each other.
This is a blocking member that prevents overlapping in the radial direction.

Therefore, by providing the reinforcing ring 8 inscribed in the end 3a of the first soft pipe 3, the engaging parts 8c and 8d of the reinforcing ring 8 are mutually connected when the fitting part is tightened with the fastening band 6. The end portions 8a, 8b are brought into abutting engagement with each other, and the tightening may sometimes cause the end portions 8a, 8b of the reinforcing ring 8 to come out of the abutting engagement, causing the reinforcing ring 8 itself to deform. It is reliably inscribed within the end portion 3a of the first soft pipe 3.

Therefore, when tightening, the reinforcing ring 8 can prevent deformation of the first soft pipe 3, thereby preventing deformation of the intake passage.

FIG. 4 shows another embodiment of the reinforcing ring, and the reinforcing ring 9 has a pair of opposing ends 9a and 9b formed by cutting out in the axial direction X of the ring 9 as shown.

The end portions 9a and 9b are arranged with a predetermined gap between them.

This gap is provided so that the reinforcing ring 9 can be reliably inscribed within the end portion 3a of the first soft pipe 3 as described above.

Further, a guide plate 10 is fixed to the inside of one end 9a of the reinforcing ring 9, and comes into contact with the inside of the other end 9b, and the guide plate 10 tightens the fitting portion with the fastening band 6. At the same time, the end portion 9b of the reinforcing ring 9 is
This is a blocking member that guides the reinforcing ring 9 to the other end 9a and prevents the ends 9a and 9b from overlapping each other in the radial direction of the reinforcing ring 9, while restricting the movement of the reinforcing ring 9 in the radial direction.

Therefore, by providing the reinforcing ring 9 inscribed in the end 3a of the first soft pipe 3, the fitting portion may be tightened when the other end 9b of the reinforcing ring 9 is attached to the guide plate 1.
0 and securely abuts and engages with one end 9a, so it has the same effect as the reinforcing ring 8 shown in FIG.

FIG. 5 shows still another embodiment of the reinforcing ring, in which a reinforcing ring 12 is provided as a guide plate inscribed inside the reinforcing ring 11.

The auxiliary ring 12 has a notch 13 cut out in the axial direction When the reinforcing ring 11 is inscribed in the end 3a of the first soft pipe 3, the inner diameter of the end 3a varies due to manufacturing errors. , llb are moved in the above-mentioned gaps so that the outer diameter of the ring 11 can be made smaller, in other words, the outer diameter of the auxiliary ring 12 can be made smaller at this time. can be reliably provided inscribed within the end portion 3a.

When tightening the fitting portion, the auxiliary ring 12 guides the ends 11a and llb of the reinforcing ring 11 so that the ends 11a and llb are mutually connected to the reinforcing ring 11.
This is a blocking member that prevents overlapping in the radial direction.

Therefore, by providing the reinforcing ring 11 inscribed within the end portion 3a of the first soft vibrator 3, the auxiliary ring 12 sometimes tightens the fitting portion. Since it guides and ensures abutting engagement, it has the same effect as the reinforcing ring 8 shown in FIG.

As is clear from the above description, according to the present invention, the end portion of the first soft pipe and the end portion of the second soft pipe constituting the intake passage of the engine are fitted into each other for a predetermined length, and the fitting portion is A first soft pipe and a second soft pipe are connected by tightening from the outside, and a reinforcing ring is provided inscribed in the end of the first soft pipe inserted inside the fitting portion, and the reinforcing A pair of end portions are formed by cutting out the ring, and the tightening of the fitting portion is sometimes performed by reinforcing a blocking member that prevents the pair of end portions from overlapping each other in the radial direction of the reinforcing ring. By providing this on the ring, when the fitting part is tightened, the two ends of the reinforcing ring can be securely brought into contact with each other by the blocking member, and deformation of the reinforcing ring itself can be prevented. This has the effect of reliably preventing deformation of the soft pipe inscribed with the ring and preventing deformation of the intake passage.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the intake passage of an engine to which the intake passage joint structure of the present invention is applied, Fig. 2 is a sectional view of main parts showing the intake passage joint structure of the present invention, and Figs. It is a figure which shows the modification of the reinforcing ring used for the intake passage joint part of an invention. 3...First soft pipe, 3a...End part, 4...Second soft pipe, 4a...End part, 8,9.11. ...Reinforcement ring, 8c, 8d
......Engaging portion, 10...Guidance plate, 12.
...Auxiliary ring.

Claims (2)

[Scope of utility model registration request] (1) The ends of the first soft pipe and the second soft pipe that constitute the intake passage of the engine are fitted into each other for a predetermined length, and the fitted portions are tightened from the outside to connect the first soft pipe and the second soft pipe. In the device for fastening two soft pipes, a reinforcing ring is inscribed in the end of the first soft pipe inserted inside the fitting part, and the reinforcing ring is cut out to form a pair of ends. An intake notification joint structure for an engine, characterized in that a blocking member is provided inside the reinforcing ring to prevent the pair of ends from overlapping in the radial direction of the reinforcing ring. (2) The engine intake passage joint structure according to claim 1, wherein the blocking member is constructed by bending a pair of ends of a reinforcing ring inward, respectively.