JPS6014906B2 - Anti-vibration air cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration-proof cleaner that prevents generation of vibration and noise.

Conventional air cleaners for internal combustion engines have many flat parts, such as short cylindrical shapes or trunk shapes as shown in Figure 5, and when vibrations of a certain frequency are applied, the flat parts resonate and become extremely dangerous. could make a lot of noise.

Furthermore, when air is inhaled, the air inlet pipe becomes a resonant pipe for intake noise, and noise may also be emitted from there. In order to prevent these noise sources, in the case of a trunk-like structure as shown in Fig. 5, as shown in Fig. 6, the side plate 1 is
By attaching the rib 19 to 4', its resonant frequency can be shifted to a high frequency band, reducing the noise level, while by making the air inlet pipe 12 like 12' and providing the inlet extension pipe 17, the resonance frequency can be shifted to a high frequency range, reducing the noise level. The frequency can be shifted to a lower frequency range and the level of noise can be reduced as well. However, attaching the ribs 19 to the side plate 14' requires high costs in terms of materials and man-hours, and deforming the air inlet pipe 12 and attaching the inlet extension pipe 17 requires high costs in terms of materials and man-hours. Unfortunately, it was not easy to install it because there was no mounting space in a narrow space like the engine compartment of a car.

The present invention provides a vibration-proof air cleaner that can be installed even in a narrow space and is inexpensive, taking measures to prevent vibration and noise as described above.

Its configuration will be explained with reference to FIGS. 1 and 4.

1 and 2 relate to a trunk-shaped air cleaner installed separately from an internal combustion engine as shown in FIG. A circular air inlet guard portion is integrally provided by molding. As shown in Figure 2,
Inside the air inlet pipe part having a semicircular cross section forming one half of the air inlet pipe 2, there is a half cross section forming the other half of the air inlet pipe 2 having a circular cross section and opposite to the air inlet pipe part. A circular inlet tube side plate 7 is adhered to the side plate 4 by welding, brazing, adhesive treatment, etc., and serves as an air inlet tube with a circular cross section. As shown by the arrow, the incoming air passes through the inlet pipe 2 from the inlet of the air inlet pipe 2, enters the front chamber 9 in the main body 1 from the other end, passes through the air filter 6, flows into the rear chamber 10, and exits. It exits from pipe 3 and is sent to the internal combustion engine.

The air filter 6 is sandwiched between the flanges 5, 5, and is attached to the main body 1 with a fastener 8. As mentioned above, the present invention has the following features:
A part of the planar side plate 4 of the main body 1 is used as a rib to prevent resonance and an inlet extension pipe to prevent intake noise.

Next, FIGS. 3 and 4 relate to an air cleaner that is placed directly on the carburetor of an internal combustion engine, and half of an air inlet pipe 2' having a circular cross section is formed on the side plate 4' of the main body 1'. An air inlet pipe portion having a semicircular cross section is integrally provided by molding.

As shown in FIG. 4, an air inlet pipe 2' having a circular cross section and opposite to the air inlet pipe 2' is located inside the air inlet pipe 2' having a semicircular cross section and forming half of the air inlet pipe 2'.
An inlet tube side plate 7' having a semicircular cross section and forming the other half of the inlet tube is adhered to said side plate 4' by welding, brazing, adhesive treatment, etc., and serves as an air inlet tube having a circular cross section. The incoming air passes through the air inlet pipe 2' from the inlet of the air inlet pipe 2', enters the front chamber 9' in the main body 1', passes through the air filter 6',
It flows into the rear chamber 10' and exits through the outlet pipe 3' to the carburetor. In this case as well, a part of the planar side plate 4' of the main body 1' is used as a rib to prevent resonance and an inlet extension pipe to prevent intake noise. Regarding the structure of the air inlet pipes 2, 2', the inlet pipe side plates 7, 7' may be provided outside the side plates 4, 4' of the air cleaner bodies 1, 1', and the effect is the same as described above.

Since the present invention has the configuration described in the claims, it does not require any increase in materials or man-hours, does not increase costs too much, is sufficiently effective in preventing resonance and countering intake noise, and is This is an excellent invention that can provide an air cleaner that does not require any installation space.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the embodiment, FIG. 2 is a horizontal cut end view taken along the 0-Ro line in FIG. 1, FIG. 3 is a plan view of another embodiment, and FIG. 4 is a W-- 5 is a perspective view of a conventional example, and FIG. 6 is a perspective view of another conventional example. 1, 1'...Main body, 2, 2'...Air inlet pipe, 4, 4'
...Side plate, 7,7'...Inlet pipe side plate. Figure 2 Figure 5 Four keys Figure 6 Figure 3 Figure 4

Claims (1)

[Claims] 1. In an air cleaner used for an internal combustion engine, an air inlet pipe portion with a semicircular cross section that forms half of an air inlet pipe with a circular cross section is integrally provided on a flat side plate of the main body by molding, and the air inlet pipe portion A vibration-proof air cleaner characterized in that an inlet pipe side plate having a semicircular cross section is bonded to the side plate facing the side plate to form an air inlet pipe having a circular cross section, and the side plate and the air inlet pipe are integrated. .