JPS588935Y2 - Engine air cleaner vibration isolator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibration isolating device for an air cleaner used in engines such as automobiles.

Air cleaners used in engines such as automobiles vibrate due to the vibrations of the engine, and in recent years, air cleaners with a built-in warm air suction device in the air inlet section (nose section) have been used to prevent exhaust emissions. (In this case, since the weight of the air inlet section increases, the vibration level increases, which is a problem.

In addition, this type of air cleaner (in this case, a flapper valve type switching valve is provided that selectively opens and closes one warm air intake in order to selectively open and close one warm air intake in accordance with one engine condition). As a result, the switching valve vibrates as described above, generating metallic noise from the contact area between the tip of the switching valve and the inner surface of the air inlet, and in addition, the bearing of the switching valve has severe wear. is occurring.

In contrast, in the past, the switching valve was installed as close as possible to the air cleaner case body to reduce the moment, or the air inlet was fixed to the vehicle body with a bracket.

However, if the former is used, the position of the switching valve cannot be freely selected, and the degree of freedom in design is reduced. It is difficult to fix this, and it is not possible to use suitable means for vibration isolation.

Therefore, in view of the above-mentioned problems with conventional air cleaners, especially air cleaners equipped with warm air suction devices, the present invention has been developed to significantly reduce the vibration level, and to improve It is an object of the present invention to provide a vibration isolating device that can improve wear of the switching valve and prevent noise from the switching valve contact section.

According to the present invention, this object is characterized in that a mass element that cancels the peak vibration of the main vibration system of the air inlet part is attached to the air inlet part 1 of the air cleaner via an elastic material. This is achieved by the air cleaner vibration isolator 1.

In this way, the air inlet section of the air cleaner (the mass element that cancels the peak vibration of the main vibration system of the air inlet section is attached via an elastic material),
The mass element and the elastic material form a small vibration system separate from the main vibration system of the air inlet section, and this separate vibration system is configured to cancel the peak vibrations of the main vibration system. As a result, the separate vibration system acts as a vibration absorber that absorbs the vibrations of the main vibration system, and the vibration level of the air cleaner itself is significantly reduced.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The figure is a longitudinal cross-sectional view of an air inlet portion showing an embodiment of the vibration isolating device for an air cleaner according to the present invention.

In this figure, 1 is an air inlet pipe, and the air inlet pipe 1 is provided to protrude outward by a predetermined length from the outer peripheral surface of an air cleaner main body (not shown).

The tip of the inlet pipe 1 is open and serves as a normal air intake port 2, and a warm air intake port 3 is also opened in the middle.

Warm air intake 3 (this is where the atmosphere warmed by the engine exhaust gas is supplied via a hose not shown).
It's happening.

A flapper type switching valve 6 is provided within the air inlet pipe 1 (which is rotatably supported around a shaft 5 whose one end is supported by a bracket 41 for opening and closing the warm air intake port 3). In the case of this embodiment, this switching valve 6 is connected to an operating rod 8 of a negative pressure diaphragm device 7 which is operated from a single negative pressure in the intake pipe. In contrast, when the engine is warmed up, the hot air intake is at the position shown by the solid line (at this position, the air intake port 2 is closed and the warm air intake port 3 is opened). Close mouth 3 and atmosphere intake port 2
I'm trying to open it.

Further, a mass element 10 having a required mass is suspended from the tip of the outer peripheral surface of the inlet pipe 1 through an elastic member 9 such as rubber on the lower surface thereof. .

Therefore, in this case, since the elastic member 9 and the mass element 10 form a small vibration system and constitute a so-called vibration absorber, the spring constant of the elastic member 9 and the mass of the mass element 10 are determined by the air cleaner, especially the air cleaner. If it is selected according to the disturbance frequency of one part of the inlet pipe, the action of the vibration absorber (in particular, the air cleaner) can reduce the vibration of one part of the inlet pipe by a wide range.

According to one example of an experiment conducted by the present inventor, it was found that the inlet section of an air cleaner that produces a vibration acceleration of approximately 25 G at a frequency of approximately 80 Hz (due to the peak vibration caused by the vibration isolation of the air cleaner due to the present invention) By installing the device, the vibration acceleration at the peak vibration I could be lowered to about 18G.

(At this time, the frequency at which peak vibration occurs is about 70 Hz and 8 degrees (this moves to a somewhat lower frequency range).

As described above, the present invention can significantly reduce the vibration level of the air cleaner, improve the wear of the switching valve bearing of the warm air intake device, and prevent noise from the switching valve contact area. will be understood.

In the above-mentioned embodiment, the present invention was explained with reference to one air cleaner equipped with a warm air suction device, but it goes without saying that the present invention may also be implemented in an air cleaner device not equipped with a warm air suction device. .

[Brief explanation of the drawing]

The figure is a longitudinal cross-sectional view showing an inlet portion of an air cleaner equipped with a vibration isolator according to the first aspect of the present invention. 1...Air inlet pipe, 2...Atmosphere intake port,
3... Warm air intake port, 4... Bracket, 5... Shaft, 6... Switching valve, 7... Negative pressure type diaphragm device,
8... Actuation iron, 9... Elastic member, 10... Mass element.

Claims (1)

[Scope of utility model registration request] A vibration isolating device for an air cleaner, characterized in that a mass element is attached via an elastic material to an air inlet section 1 of the air cleaner for canceling peak vibrations of a main vibration system of the air inlet section.