JPH0442516Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure between a case and an inlet of an air cleaner that purifies air drawn into an internal combustion engine.

[Prior Art] Conventionally, this type of structure includes a resin inlet 70, as shown in FIGS. 8 and 9, for example.
A protrusion 702 is provided on the outer periphery of the end of 1, and
A plurality of slits 703 are provided inside the end portion so as to be elastically deformable. This inlet 701 is fitted inside a branch pipe 705 of a resin case 704 that houses a filtration element inside, and the protrusion 702 of the inlet 701 is inserted into the case 70.
It was installed by locking it to the inner wall of No.4.

[Problems to be solved by the invention] However, since the inlet 701 is made of resin, if there is a flat part or a substantially flat part such as an inwardly curved part at the connection part with the branch pipe 705, the inlet 701 is made of resin. This has the problem that it bends inward as shown by the dashed line in the center, and a gap is created between the inside of the branch pipe 705 and the outside of the inlet 701 after assembly.

This invention was made in view of the above circumstances,
The purpose is to provide an inlet mounting structure that can prevent the inlet from bending inward when the inlet is connected to a branch pipe.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an air intake port and a flange-shaped branch pipe surrounding the intake port, and has an air purifying pipe inside. a resin inlet that includes a case for storing the filter element, a slit that reduces the diameter of the end that is fitted into the branch pipe, and a protrusion that engages with the inner wall of the case on the outer periphery of the end; A fitting gap is disposed within the branch pipe so as to span the branch pipe, and a fitting gap is provided at both ends of the inlet to sandwich the end of the inlet between the inner wall of the branch pipe and the inner wall of the inlet. The present invention adopts a structure consisting of an inlet support part that is fitted into the slit, and a support member formed with a slit fitting part that fits into the slit.

[Function] With the above configuration, the present invention has the inlet fitted into the branch pipe of the case, and when the part of the inlet fitted into the branch pipe tries to bend inward, the inner wall of the inlet comes into contact with the support member, To prevent a portion of an inlet fitted into a branch pipe from bending inward.

[Effects of the invention] As described above, according to the invention, it is possible to prevent the generation of a gap between the branch pipe and the inlet.

[Example] Next, an inlet mounting structure of the present invention will be described based on an example shown in the drawings.

FIG. 1 shows an exploded view of an air cleaner 100 that purifies air drawn into an engine (not shown). The air cleaner 100 guides air into the lower case 300 through an inlet 200, and discharges purified air through a filter element 600 from an exhaust duct 500 provided in the upper case 400.

The inlet 200 is made of resin and has a substantially T-shape as shown in FIGS. 2 and 3.
an air intake port 201 that takes air into the interior;
Two openings are provided in the lower case 300: an exhaust port 202 that guides the air sucked in from the air intake port 201. The discharge port 202 has an oval cross section, and the end of the inlet 200 on the discharge port 202 side is attached to the lower case 300. As shown in FIG. 4, a protrusion 203 with a triangular cross section that engages with the inner wall of the lower case 300 is formed around the entire outer circumference of the discharge port 202. As shown in FIG. As shown in FIG. 5, on both ends of the outer periphery of the inlet 200 on the side of the air intake port 201 of this protrusion 203, a branch pipe 302 is attached when the inlet 200 is fitted into the lower case 300.
A convex portion 204 that comes into contact with the end face of the inlet 204 to prevent the inlet 200 from excessively entering the lower case 300.
is provided. In addition, a deformation prevention slit 205 is provided at the center of both flat portions of the outlet 202, and a slit 205 is provided at both ends of the outlet 202 to prevent the diameter of the outlet 202 from being inserted when the inlet 200 is fitted into the lower case 300. Elastic deformation slit 206 that is elastically deformed to reduce its diameter and facilitate fitting work.
is formed.

The lower case 300 is made of resin and has a box shape with an open top, and is provided with an intake port 301 on one side for taking air into the interior from the inlet 200. This intake port 301, as shown in FIG.
Since the outer periphery of the outlet 202 of the inlet 200 is fitted inside, it has the same oval shape as the outer periphery of the outlet 202. Around this intake port 301,
A branch pipe 302 that protrudes outward from the lower case 300 is integrally formed so as to surround the intake port 301 . This branch pipe 302 holds the outer circumference of the inlet 200 with its inner circumference. Intake port 3
A plate-shaped support member 310 is stretched over the center of the flat portions of the inlet 200 and the branch pipe 302 at a position where the deformation prevention slit 205 of the inlet 200 is fitted. This support member 310 is formed integrally with the lower case 300 together with the reinforcing rib 303 of the lower case 300.

As shown in FIGS. 4 and 5, the support member 310 includes a slit fitting portion 311 that is fitted with the deformation prevention slit 205, and also has a slit fitting portion 311 that is fitted with the deformation prevention slit 205, and also has an outlet 20 of the inlet 200 between it and the branch pipe 302.
The inlet support part 312 is provided with a gap having a thickness of 2 mm and supports the inner wall of the inlet 200 fitted in the branch pipe 302 from the inside. Further, this support member 310 is provided with an inclined portion 313 on the side into which the inlet 200 is fitted, so that the inlet 20
Even if the flat portion of the inlet 200 is curved inward, the flat portion of the inlet 200 is guided between the branch pipe 302 and the inlet support 312.

In addition, the lower case 300 includes the lower case 300.
A plurality of mounting portions 320 are provided for mounting the 0 in the engine room. This mounting part 320
is provided with a vibration-proofing rubber 322 between a steel collar 321 connected to the inside of the engine room, and is provided in a structure that prevents vibrations of the vehicle body from being transmitted to the lower case 300.

Further, on the side surface of the lower case 300, there is a plate spring-shaped clamp 330 for fixing the upper case 400.
multiple are installed.

The upper case 400 is made of resin and has a box shape with an open bottom, and is provided with an outlet (not shown) on one side through which internal air flows out to the exhaust duct 500. Furthermore, a locking portion 401 is provided on the side surface of the upper case 400 to which the clamp 330 of the lower case 300 is fitted.

The discharge duct 500 is made of resin and is connected to the upper case 40.
0, and is connected to a purified air intake port (not shown) for taking out the air in the upper case 400, a purified air discharge port 501 connected to the intake pipe of the engine, and an engine rocker cover. Equipped with a blow-by gas intake port 502,
The purified air outlet is joined to the outlet of the upper case 400 by adhesive, laser welding, or the like.

Next, the procedure for assembling the air cleaner 100 will be explained.

The connection between the inlet 200 and the lower case 300 is achieved by elastically deforming the end of the discharge port 202 of the inlet 200 inward through a deformation prevention slit 205 and an elastic deformation slit 206.
The outlet 202 of the inlet 200 is inserted into the branch pipe 302 until the protrusion 203 on the outer periphery of the inlet 202 passes through the inner wall of the branch pipe 302 and the protrusion 204 on the outer periphery of the inlet 200 comes into contact with the outer surface of the lower case 300. This allows the protrusion 203 to
00, and the inlet 200 is supported within the branch pipe 302.

When inserting this inlet 200 into the branch pipe 302, the intake port 20 of the deformation prevention slit 205
The end of the first side is connected to the inner wall of the branch pipe 302 and the inlet support part 31 by the inclined part 313 of the support member 310.
You will be guided into the gap between 2. Then, the deformation prevention slit 205 is externally fitted into the slit fitting part 311, and the inner wall of the inlet 200 fitted into the branch pipe 302 comes into contact with the inlet support part 312.

As a result, the branch pipe 302 of the inlet 200
Even if the flat portion fitted therein tries to bend inward, the inlet support portion 312 will not hold the inlet 200.
In order to prevent it from bending inward due to contact with the inner wall of
It is possible to prevent a gap from forming between the branch pipe 302 and the inlet 200.

In addition, when the air cleaner 100 is installed in a vehicle, the inlet 200 may cause vibrations that cause the lower case 3 to
It is fixed to the lower case 300 with screws 210 to prevent it from coming off.

Note that the lower case 300, the upper case 400, and the filtration element 600 are different from the lower case 300.
The filter element 600 is housed inside the filtration element 600, the upper case 400 is placed above it, and the lower case 3
It is fixed by fitting the clamp 330 of No. 00 into the locking part 401 of the upper case 400.

FIG. 7 shows a second embodiment. Note that the same reference numerals as in the above embodiments indicate the same functional objects.

In this embodiment, support members 310 are stretched across the flat portion of the branch pipe 302 at three locations. As a result, the distance between the flat portions of the inlet 200 supported by the support member 310 is shortened, so that the occurrence of a gap between the branch pipe 302 and the inlet 200 can be further prevented compared to the above embodiment.

(Modification) In the above embodiment, the support member is provided integrally with the lower case, but it may be provided separately and attached to the branch pipe or the outlet of the inlet.

Although an example is shown in which the inlet is attached to the lower case, it may be attached to any position of the air cleaner case, such as attached to the upper case.

Although the branch pipe is provided to protrude outward from the case, it may be provided to protrude inward.

A case for storing the filtration element, a support member,
An example was shown in which the exhaust duct etc. were made of resin, but
It may also be formed of other materials such as metal.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of the air cleaner, Figure 2 is a top view of the inlet, Figure 3 is a rear view of the inlet, Figure 4 is a side sectional view of the inlet and lower case, and Figure 5 is a lower side view of the inlet. A side sectional view showing the state installed in the case, Figure 6 is A shown in Figure 5.
- A cross-sectional view taken along line A; FIG. 7 is a front cross-sectional view of the connecting portion between the inlet and the branch pipe showing the second embodiment;
FIGS. 8 and 9 are cross-sectional views showing the state of connection between a conventional inlet and a branch pipe. In the figure, 100...air cleaner, 200...inlet, 300...lower case, 301...intake port, 302...branch pipe, 310...support member,
312... Inlet support part, 400... Upper case, 500... Discharge duct, 600... Filtration element.

Claims (1)

[Claims for Utility Model Registration] 1 (a) A case comprising an air intake and a flange-shaped branch pipe surrounding the intake, and housing an air purifying element inside; (b ) a resin inlet having a slit that reduces the diameter of the end that is fitted into the branch pipe, and a projection that engages with the inner wall of the case on the outer circumference of the end; (c) a resin inlet that is fitted into the branch pipe; Disposed in the branch pipe so as to span the inlet, and at both ends thereof, a fitting gap that sandwiches the end of the inlet between the inlet and the inner wall of the branch pipe, and an inlet support part that supports the inner wall of the inlet. , and a support member formed with a slit fitting portion that fits into the slit. 2. The inlet mounting structure according to claim 1, wherein the support member is provided integrally with the case.