JPH0333530Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a support structure for an air cleaner in an automobile engine, and particularly to a support structure for an air cleaner when the air cleaner is directly attached to the vehicle body.

(Prior Art) Generally, an automobile engine is equipped with an air cleaner for filtering the air taken into the cylinder, but since the case of this air cleaner is made of a thin steel plate, it is difficult to connect the engine or car body. It has a structure that easily resonates with vibrations. In particular, in the case of an engine that does not have a carburetor, such as a diesel engine, the air cleaner is attached to the vehicle body. In this case, conventionally, the air cleaner was supported on the vehicle body via a metal bracket. As a result, the vibrations of the vehicle body are directly transmitted to the air cleaner, causing the air cleaner to vibrate significantly or resonate with the vibrations of the vehicle body to generate noise, which causes so-called interior noise. To deal with such air cleaner vibrations, for example,
There is an idea disclosed in Publication No. 7574. When the air cleaner is attached to the carburetor, an elastic bushing is interposed between the air cleaner and the carburetor, and an elastic bushing is also interposed between the constituent members of the air cleaner. According to this, it is expected that the transmission of vibration from the carburetor to each component of the air cleaner is suppressed by the buffering action of the elastic bushing, and the generation of vibration noise of the air cleaner is reduced. However, even with this configuration, it is difficult to suppress air cleaner vibrations to the extent that can effectively reduce the noise level, and additional measures must be taken for engines where the air cleaner is directly attached to the vehicle body. There is a need.

(Purpose of the invention) The present invention is intended to address the above-mentioned problems in the prior art, and is to improve the support structure of the air cleaner that is directly attached to the vehicle body, such as in the case of diesel engines, by using an extremely simple structure and improving the support state of the air cleaner. Without causing instability, it effectively suppresses the transmission of vehicle body vibrations to the air cleaner during engine operation, thereby preventing significant vibrations of the air cleaner and resonance with vehicle body vibrations, and reducing the impact caused by these. The purpose is to reduce the generation of noise from the air cleaner or the muffled noise in the room.

(Structure of the invention) In order to achieve the above object, the present invention is characterized by the following structure.

That is, the mount member that supports the air cleaner on the vehicle body is connected to a thick first fixing part provided at one end, a curved part extending horizontally from below the first fixing part, and the curved part. The first fixing part is sandwiched between a flange provided on the upper periphery of the air cleaner case, and the second fixing part is attached to the vehicle body side. By fixing the air cleaner to the mount member, the air cleaner is supported by the vehicle body through the mount member. In particular, in this supported state, the portion of the curved portion facing the outer circumferential surface of the air cleaner case is connected to the first fixing portion so that a predetermined distance is created between the curved portion of the mount member and the outer circumferential surface of the air cleaner case. It is characterized in that it is located on the outer side of the case from the surface that contacts the outer circumferential surface of the case.

According to this configuration, the air cleaner is supported in a floating state by a plurality of rubber mount members formed in an L shape, and can be relatively freely moved relative to the vehicle body. This effectively suppresses the transmission of vehicle body vibration to the air cleaner.

In addition, when the air cleaner is floatingly supported in this way, the air cleaner swings with a large amplitude due to the vibrations of the vehicle body, making the support state unstable and causing damage to the air cleaner and the intake pipe connected to it. However, with the above configuration, when the air cleaner is deviated by a predetermined amount with respect to the vehicle body, the curved part of the rubber mount member will move against the air cleaner case. Since the air cleaner comes into contact with the outer circumferential surface and prevents a large deviation of the air cleaner, the supporting state of the air cleaner is stabilized, and fatigue due to the above-mentioned repeated stress is prevented.

(Effects of the invention) According to the above configuration, in a configuration in which the air cleaner is attached to the vehicle body, the air cleaner is supported in a floating state relative to the vehicle body by a plurality of mount members made of rubber. Transmission of vehicle body vibrations to the air cleaner is effectively suppressed, and the generation of noise due to the vibration of the air cleaner, or the muffled sounds in the room due to this noise, etc., are reduced.

Particularly, according to the present invention, when the air cleaner is supported in a floating manner, vibrations of the air cleaner with a large amplitude are prevented, the supporting state is stabilized, and the air cleaner and its connection are thereby stabilized. Fatigue due to repeated stress at the joints with the intake pipes, etc., can be prevented.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, the air cleaner 1 includes an air cleaner case 2 whose top surface is open, a cover 3 that covers the top surface of the air cleaner case 2, and a space formed by the air cleaner case 2 and the cover 3. Air cleaner element 4 housed in
It is composed of: The air cleaner case 2 has an air suction pipe 2 on its outer circumferential surface.
a is fixedly installed, and an air intake duct 5 communicating with an intake port (not shown) of the engine is connected to the air outflow cylindrical part 2b provided on the bottom of the case, and the air intake pipe The air sucked into the case 2 from the air cleaner element 4 has foreign matter removed from it by the air cleaner element 4, and is then supplied to the combustion chamber of the engine via the air outflow cylindrical part 2b and the intake duct 5. It's summery. Here, the element 4 is held in a predetermined position by a holding member 6 provided on the circular bottom surface of the air cleaner case 2 and a holding member 7 provided on the back surface of the cover 3. Air cleaner case 2
A flange portion 2c is formed around the upper end, and a ring-shaped rubber seal member 8 is sandwiched between the flange portion 2c and the peripheral edge 3a of the cover 3. It is fixed to the air cleaner case 2 using members 9 and 10.

Thus, the air cleaner 1 includes brackets 12...12 fixed to the vehicle body 11 and mounting members 13...
The mounting members 13...13 are supported by the vehicle body 11 at three locations around the periphery, and the mounting members 13...13 are made of rubber. As shown in an enlarged view in FIG. 3, each mount member 13 has a thick first fixing part 13a at one end, and a second fixed part 13a on which a cylindrical metal sleeve 14 is baked at the other end.
The fixing part 13b and the curved part 13c, which curves horizontally from below the first fixing part 13a and continues to the second fixing part 13b, form a substantially L-shape, and the first fixing part 13a The second fixing portion 13b is held by the flange 2c formed around the upper end of the air cleaner case 2, and is formed by a bolt 15 inserted into the sleeve 14 and a nut 16 screwed onto the bolt 15. Above bracket 1
It is fixed to 2. In this state, in order for the curved portion 13c of the mount member 13 and the outer circumferential surface 2d of the air cleaner case 2 to face each other with a predetermined interval X, the portion of the curved portion 13c facing the outer circumferential surface 2d of the air cleaner case The dimensional relationship is set such that 13c' is located on the outer side of the case 2 from the contacting surface 13a' of the first fixing portion 13a with the case outer peripheral surface 2d.

According to the above configuration, the vehicle body 11 vibrates when the engine is operating, and this vibration is transmitted to the air cleaner 1, but the air cleaner 1 has three mount members 13...13 made of rubber around the air cleaner 1.
Since the vibrations of the vehicle body 11 are absorbed by the elastic deformation of these mount members 13 . Therefore, generation of noise from the air cleaner 1 due to resonance of the air cleaner 1 with vibrations of the vehicle body 11 is prevented, and noise such as muffled noise in the vehicle interior of the vehicle is reduced.

On the other hand, since the air cleaner 1 is supported in a floating state, it tends to swing with a large amplitude due to the vibrations of the vehicle body 11, but the air cleaner 1 deviates from the vehicle body 11 by a predetermined distance X. At this point, the curved portion 13c of the mount member 13 comes into contact with the outer circumferential surface 2d of the air cleaner case 2, as shown by the chain line in FIG. Ru. Therefore, large vibrations of the air cleaner 1 as described above are prevented, and the air cleaner 1
The supporting state of the air cleaner case 2 is stabilized, and repeated stress at the connection portion between the cylindrical portion 2b formed on the bottom surface of the air cleaner case 2 and the intake duct 5, as well as fatigue caused by the stress, is prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view showing the support state of the air cleaner, FIG. 2 is a vertical sectional view taken along the line of FIG. FIG. DESCRIPTION OF SYMBOLS 1...Air cleaner, 2...Air cleaner case, 2c...Flange part, 2d...Outer peripheral surface, 11
...Vehicle body, 13...Mount member, 13a...First fixing part, 13a'...Opposing surface, 13b...Second fixing part, 13c...Curved part, 13c'...Opposing part, X
……interval.

Claims (1)

[Scope of utility model registration request] A mount member supporting the air cleaner includes a thick first fixing part provided at one end, a curved part extending horizontally from below the first fixing part, and a second fixing part following the curved part. The first fixing part is sandwiched between a flange part provided on the upper periphery of the air cleaner case, and the second fixing part is fixed to the vehicle body side. The air cleaner is supported on the vehicle body via the mount member, and the air cleaner is mounted on the curved portion of the mount member so that a predetermined distance is created between the curved portion of the mount member and the outer peripheral surface of the air cleaner case in this supported state. An air cleaner support structure characterized in that a portion facing the outer circumferential surface of the case is located further outward of the case than a surface of the first fixing portion that faces the outer circumferential surface of the case.