JPH0138294Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention [Industrial application field] The invention is a general-purpose internal combustion engine used as a drive source for equipment for agricultural work, civil engineering work, and other various types of work, or as a drive source for portable generators, pumps, etc. This invention relates to an engine air cleaner, particularly an air cleaner equipped with a cyclone type pre-cleaner.

[Conventional technology] Single use of filter media such as filter paper or urethane foam,
Alternatively, a cyclone-type pre-cleaner is placed on the side of the air cleaner body used in conjunction with the air cleaner, and the air that has been separated and removed by the pre-cleaner is introduced into the air cleaner body from the side port (for example, No. 20689, 1982
-50126) is known.

[Problem that the invention attempts to solve]

In the above-mentioned conventional air cleaner with a pre-cleaner, the air outlet at the top of the cyclone-type pre-cleaner placed on the side of the air cleaner body is fitted into the air inlet of the air cleaner body, and the fitting part is connected to the pre-cleaner. The cleaner is supported in an overhanging manner with respect to the air cleaner main body. Therefore, due to the vibration of the precleaner as the engine operates, the weight of the precleaner is concentrated at the joint with the air cleaner main body, which may cause the joint to lose its airtightness and eventually deteriorate the durability of the joint. A similar problem exists in an air cleaner equipped with a pre-cleaner containing a filter medium.

The present invention solves the above-mentioned problems of conventional air cleaners with pre-cleaners, and aims to improve the strength and durability of the air cleaner.

B. Structure of the invention [Means for solving the problem] In an air cleaner equipped with a pre-cleaner, the air outlet provided at the top of the pre-cleaner and the air inlet on the side of the air cleaner body are replaced by a flange provided on the pre-cleaner side. At the same time, the end of the air outlet is fitted into the air inlet,
Furthermore, the flange of the pre-cleaner and the latching part provided integrally with the flange and protruding toward the air inlet on the side surface of the air cleaner body and the latched part provided on the side surface of the air cleaner body are latched. The sides of the air cleaner body are secured with fixed parts.

[Effect]

The air from which most of the dust has been separated and removed by the precleaner is sucked into the air cleaner body through the outlet of the precleaner and the air inlet of the air cleaner body, further purified by a filter medium, and then supplied to the carburetor.

The weight of the pre-cleaner is distributed and supported between the flange joint and the hook below.

〔Example〕

In the figure, reference numeral 1 denotes the main body of a general-purpose internal combustion engine, and an air guide cover 2 that covers an engine cooling fan integrated with a flywheel is attached to one side of the main body. Further, a recoil starter 3 is attached to the outside of the cover 2.

A fuel tank 4 is mounted and fixed at a position close to one side of the upper surface of the engine body 1, and further beside the tank 4,
The air cleaner body 6 and the muffler 7 equipped with the cyclone pre-cleaner 5 are connected to the air cleaners 5 and 6.
are installed side by side so that they are located on the recoil starter 3 side.

A cylindrical filter medium in which a filter paper 8 and a urethane foam 9 are stacked inside and outside is housed in the air cleaner body 6, and the inner space of the cylindrical filter medium 8, 9 is a ventilation duct 1.
0 to the carburetor 11.

At the same time, the end of the air outlet 51 at the top of the cyclone pre-cleaner 5 is fitted into the air inlet 61 opened on the side of the air cleaner body 6, and at the same time, the flange 12 provided around the outlet 51 is inserted into the side of the air cleaner body 6. A bolt 13 passing through the flange 12 is screwed into a nut 17 of a nut attaching plate 16 which overlaps around the opening 61 inside the side surface of the air cleaner main body 6. Instead of the bolts 13 and nuts 17, other fastening parts such as tap bolts or latching fittings using leaf springs may be used for fastening.

There is a hook 14 below the flange joint 12 that protrudes toward the air cleaner main body 6, and is hooked into a hole 15 in the case of the air cleaner main body 6 and a cover plate 16.

In the illustrated example, a pair of left and right hooks 14 are provided as shown in FIGS. 4 and 5, but a single horizontally long hook 14 may also be provided.

The pre-cleaner 5 is divided into upper and lower halves, and its air intake port 52 opens obliquely downward on the opposite side from the muffler 7. Its mouth 52 is fitted with a lattice 53.

Air sucked into the precleaner 5 from the intake port 52 as the engine is operating is rotated by a tangential duct 54 and a rotating guide vane 55, and dust and other high-density dust are collected by a dust pan 56.
and is discharged from the small hole 57. On the other hand, the air from which most of the dust has been removed rises through the center, passes through the duct 58, passes through the ports 51 and 61, is introduced into the air cleaner main body 6, and is further purified by the filter media 8 and 9.

C. Effect of the invention As described above, the air cleaner of the present invention is an air cleaner equipped with a pre-cleaner, in which the air outlet 51 provided at the top of the pre-cleaner 5 and the air inlet 61 on the side surface of the air cleaner body 6 are connected to the side of the pre-cleaner 5. At the same time, the end of the air outlet 51 is fitted into the air inlet 61 through the flange 12 provided on the flange 12, and the end of the air outlet 51 is fitted into the air inlet 61 on the side of the air cleaner body 6, which is integrally provided with the flange 12. The latching portion 14 protruding toward the front is engaged with a latched portion 15 provided on the side surface of the air cleaner body 6, and the flange 12 of the pre-cleaner 5 and the side surface of the air cleaner body 6 are fastened with fixing parts 13 and 17. Therefore, at the same time as the flange 12 is tightened and connected, the hooking portions 14 and 15 are hooked to each other, and the weight of the precleaner 5 is distributed and supported by the flange connecting portion, the fitting portion, and the hooking portion, and the air cleaner body 6 This has the effect of increasing the mounting strength of the pre-cleaner 5 to the air cleaner and improving the durability of the air cleaner.

Also, the pre-cleaner 5 is
Since it is removable, you can easily install the air cleaner 5 depending on the situation of the place where it is used, such as installing the pre-cleaner 5 in a dusty area and removing the pre-cleaner 5 and using only the air cleaner body 6 in a dusty area. It can be used for different purposes.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a general-purpose internal combustion engine equipped with the air cleaner of the present invention, Fig. 2 is an enlarged front view of the general-purpose internal combustion engine taken longitudinally through the pre-cleaner, and Fig. 3 is a general-purpose internal combustion engine taken longitudinally through the pre-cleaner and the air cleaner body. FIG. 4 is a bottom view of the upper half of the pre-cleaner; FIG. 5 is a cross-sectional plan view of the air cleaner body and the pre-cleaner. 1 is a general-purpose internal combustion engine, 5 is a pre-cleaner, 51 is an air outlet, 52 is an air intake port, 6 is an air cleaner body, 61 is an air intake port, 7 is a muffler, 8 and 9 are filter media, 10 is a ventilation duct, 11 is a carburetor,
12 is a flange, 13 is a flange tightening bolt, 1
4 is a hook, 15 is a hook hook hole.

Claims (1)

[Scope of claim for utility model registration] (1) In an air cleaner equipped with a pre-cleaner, the air outlet provided at the top of the pre-cleaner and the air inlet on the side of the air cleaner body are connected to the flange through a flange provided on the pre-cleaner side. At the same time, the end of the air outlet is fitted into the air inlet, and the flange is integrally provided with a hook part protruding toward the air inlet on the side of the air cleaner body, and a hook part on the side of the air cleaner body. An air cleaner in which the flange of the pre-cleaner and the side surface of the air cleaner body are fastened with fixed parts, with the provided latched part being latched. (2) Utility model registration claim 1 in which the pre-cleaner is fixed by stacking a patch plate around the air inlet inside the side surface of the air cleaner body and sandwiching the side surface of the air cleaner body between the patch plate and the flange. Air cleaner as described in section.