JPH10252585A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain reduction of a cost by simplification of an assembly procedure, unification of outward appearance design and reduction of a number of part items. SOLUTION: A cleaner element is formed as either of a wet cleaner element or a dry cleaner element 12 having a peripheral frame 13 of elastic material in the fitting peripheral shape dimension equal to the wet cleaner element. The wet cleaner element, when it is used, of a plurality of ribs in a housing 10, by at least one rib, is directly retained to be set up, the dry cleaner element 12, when it is used, of a plurality of ribs in the housing 10, through a retaining frame 14 supported into contact with at least one rib, by retaining the peripheral frame 13 air-tightly relating to an element casing 11, is set up, so that two kinds of the cleaner elements can be selectively mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air cleaner applied to a general-purpose engine or the like.

[0002]

2. Description of the Related Art Generally, an internal combustion engine (engine) is provided with an air cleaner at an upstream end of an intake passage in order to filter intake air and take in clean air. 2. Description of the Related Art An air cleaner used in a conventional general-purpose engine has a cleaner element housed in a casing composed of a cleaner case and a cleaner cover. The casing has an air guideway extending from the air intake port to the element, and an air outflow path extending from the element to the air discharge port.

In such an air cleaner, the air introduced from the air inlet is guided to the element and filtered, and suspended substances such as dust contained in the air are captured by the element. Then, clean air is sent from the air discharge port to the vaporizer.

FIG. 7 is a sectional view showing the structure of an air cleaner disclosed in Japanese Utility Model Laid-Open Publication No. 6-40350.
In FIG. 7, a primary cleaner element 30 and a secondary cleaner element 35 are housed in a casing 100. The primary cleaner element 30 is integrated by overlapping a sponge and a resin mesh, winding the peripheral edge of the sponge around the edge of the metal support frame, and biting the same. Also, the secondary cleaner element 35
Are integrated by overlapping a nonwoven fabric filter and a wire netting and fitting them into a frame 38 made of synthetic resin.

Further, the frame body 38 of the secondary cleaner element 35 is placed on the support rib 22 formed on the air cleaner case 110, and the primary cleaner element 30 is placed on the secondary cleaner element 35, and the primary cleaner element 30 sponges are pressed by pressing ribs formed on the air cleaner cover 120. This gives 1
The next cleaner element 30 and the second cleaner element 35 are detachably held between the air cleaner case 110 and the air cleaner cover 120. Reference numeral 40 denotes a carburetor.

[0006]

The above-mentioned conventional general-purpose engine air cleaner uses three types of elements, a dry element, a wet element, and a combined dry and wet element, depending on the application. However, an air cleaner case and an air cleaner cover are individually configured for each element type and the shape is designed in correspondence with the element. For this reason, the engine assembly procedure differs for each element, the appearance design changes, and the number of types of parts increases, so that there is a problem that the production cost does not decrease.

An object of the present invention is to use the same air cleaner case and air cleaner cover irrespective of the type of element, thereby simplifying the assembly procedure, unifying the external design, and reducing the cost by reducing the number of parts. Is to provide.

[0008]

Means for Solving the Problems To solve the above problems and achieve the object, an air cleaner of the present invention is configured as follows. (1) An air cleaner according to the present invention has a housing portion for a cleaner element and an air discharge port, and has an element casing attached to an intake air intake of a carburetor, an air passage for holding the cleaner element and an air passage to the cleaner element. A housing having a plurality of ribs and an air inlet formed therein, the housing being attached to the element casing, wherein the cleaner element removes dust contained in the intake air by the cleaner element, wherein the cleaner element is a wet cleaner element or Any of a dry cleaner element having a peripheral frame made of a resilient material having the same fitting outer peripheral dimensions as the wet cleaner element, wherein at least one of the plurality of ribs in the housing is used when the wet cleaner element is used. The wet cleaner element is directly pressed and installed by a rib, and when the dry cleaner element is used, the peripheral frame is held by a pressing frame supported in contact with at least one of the plurality of ribs in the housing. The two types of cleaner elements can be selectively attached by being installed in an airtight manner with respect to the element casing. (2) The air cleaner according to the present invention is the air cleaner according to the above (1), wherein a double cleaner element in which a wet cleaner element is superposed on a dry cleaner element is accommodated in the element casing, and the dry cleaner element is replaced with the dry cleaner element. The peripheral frame is installed by airtightly pressing against the element casing via a holding frame supported in contact with at least one of the plurality of ribs in the housing, and the wet cleaner element is mounted on the housing in the housing. By pressing directly with at least one of the ribs,
The double cleaner element can be attached.

[0009]

FIG. 1 is a perspective view of a general-purpose engine using an air cleaner according to an embodiment of the present invention.
In FIG. 1, 1 is an air cleaner, 2 is a recoil starter, 3 is a fuel tank, 4 is an operation panel of an engine, 5 is a protection cover for an exhaust system, and 6 is a cylinder protection cover.

FIG. 2 is a sectional view of the air cleaner 1, FIG. 3 is a sectional view taken along the line AA shown in FIG. 2, and FIG.
It is sectional drawing which follows the CDB line. 2 to 4, a resin molded product housing 10, a resin molded product element casing 11, and a dry cleaner element 12 made of a nonwoven fabric filter are made of an element supporting frame 1 made of an elastic material.
3 and is adhered and integrated with the element support frame 13. The holding frame 14 of the resin-formed product airtightly fixes the element 12 fixed by the element support frame 13 to the element casing 11.

The housing 10 is covered by the element casing 11. The housing 10 is fixed to and attached to the element casing 11 by bolts 15, and forms a housing box 11a for the cleaner element. The dry cleaner element 12 is detachably accommodated in the accommodation box 11a by the element support frame 13.

The element casing 11 is fixed to a suction air inlet (not shown) of the carburetor 7 of the engine by bolts 16. An air inlet 17 is formed in the housing 10 and the element casing 1
1 has an air discharge port 18 formed therein. Housing 1
0, the holding ribs 10a, 10a for holding the holding frame 14
c, 10e, 10d and reinforcing rib 10 forming an air passage
b is provided.

FIG. 5 is a cross-sectional view when the composite element is attached to the air cleaner 1. FIG. 5 shows a case in which the wet cleaner element 21 is a primary cleaner element, the dry cleaner element 12 is a secondary cleaner element, and two different types of cleaner elements constitute a composite element.

The dry cleaner element 12 on the secondary side includes:
As described above, the holding frame 14 and the housing 10 are airtightly attached to the storage box 11a via the element support frame 13. Primary wet cleaner element 21
Is mounted on the dry cleaner element 12 while being held down by the ribs 10a and 10b of the housing 10.

FIG. 6 is a cross-sectional view when a thick wet-type cleaner element is attached to the air cleaner 1. In this case, the holding frame 14 becomes unnecessary, and the wet cleaner element 22 having a wire mesh attached to the outlet side is directly fitted into the housing box 11a of the element casing 11, and is pressed down and attached by the ribs 10a and 10b of the housing 10. ing.

Next, the operation of the air cleaner 1 configured as described above will be described. With the operation of the engine, outside air is sucked from the carburetor 7 through the air cleaner 1 into a cylinder (not shown) of the engine. In the air cleaner 1, outside air is introduced into the housing 10 from an air suction port 17 that opens downward, and
Through the air discharge port 18 of the element casing 11.
Is sent to the vaporizer 7. Then, when the outside air passes through the cleaner element 12 (the cleaner elements 21 and 22), dust in the outside air is removed.

As described above, according to the present embodiment, by using one type of element casing 11 and the housing 10 of the air cleaner, the element,
It is possible to cope with three kinds of specifications of a dry element and a dry-wet composite element.

It should be noted that the present invention is not limited to only the above-described embodiment, and can be implemented with appropriate modifications without departing from the scope of the invention. (Summary of Embodiment) The configuration, operation and effect shown in the embodiment are summarized as follows. [1] The air cleaner shown in the embodiment has a housing 11a for the cleaner element and an air discharge port 18, and holds down the element casing 11 attached to the intake air intake of the carburetor 7 and the cleaner element. And a housing 10 having a plurality of ribs 10a to 10e forming an air passage to the cleaner element and an air intake port (17) and being attached to the element casing 11. In the air cleaner to be removed by the cleaner element, the cleaner element may be a wet cleaner element 22 or a peripheral frame (1) made of a resilient material having the same fitting outer peripheral dimensions as the wet cleaner element 22.
3), when the wet-type cleaner element 22 is used, the plurality of ribs 10a to 10e on the housing 10 are used.
The wet-type cleaner element 22 is directly pressed and installed by at least one of the ribs. When the dry-type cleaner element 12 is used, the wet-type cleaner element 22 is supported in contact with at least one of the plurality of ribs 10a to 10e in the housing 10. The two types of cleaner elements 12, 22 can be selectively attached by installing the surrounding frame (13) airtightly against the element casing 11 via the holding frame 14 to be mounted.

Therefore, in the above air cleaner,
The dry cleaner element 12 and the wet cleaner element 22, which are used in accordance with the intended use, are designed to be interchangeable in the housing 10 of the set of element casings 11, so that the engine assembly procedure is simplified and the external appearance is simplified. The design can be unified and there is no need to change.
Accordingly, the number of types of parts is reduced, so that the production cost is reduced. If the appearance design is changed, it can be handled only by changing the shape of the housing. [2] The air cleaner shown in the embodiment is the same as the above [1].
The double cleaner element in which the wet cleaner element 21 is superimposed on the dry cleaner element 12 is accommodated in the element casing 11, and the dry cleaner element 12 is provided with the plurality of ribs in the housing 10. 10a-10
e, the peripheral frame (13) is airtightly pressed against the element casing 11 via a holding frame 14 supported in contact with at least one of the ribs, and the wet cleaner element 21 is mounted on the housing 10 in the plurality of positions. The double cleaner element can be mounted by directly pressing at least one of the ribs 10a to 10e.

Therefore, in the above air cleaner,
In a housing 10 of a set of element casings 11, three types of elements, a dry-type cleaner element 12, a wet-type cleaner element 21, and a dry-type wet-type composite element, which are properly used depending on the application, are designed to be interchangeable. Therefore, the engine assembly procedure is simplified, and the appearance design can be unified and need not be changed. Accordingly, the number of types of parts is reduced, so that the production cost is reduced. If the appearance design is changed, it can be handled only by changing the shape of the housing.

[0021]

The air cleaner according to the present invention is designed in such a manner that the dry cleaner element and the wet cleaner element which can be used properly according to the intended use can be exchanged in the housing of a set of element casings. The procedure is simplified, and the appearance design can be unified, eliminating the need to change. Accordingly, the number of types of parts is reduced, so that the production cost is reduced. If the appearance design is changed, it can be handled only by changing the shape of the housing.

The air cleaner of the present invention has a shape in which three types of elements, ie, a dry cleaner element, a wet cleaner element, and a dry-wet composite element, which can be properly used depending on the application, can be replaced in a housing of a set of element casings. The design is simpler, the engine assembly procedure is simplified, and the appearance design can be unified and need not be changed. Accordingly, the number of types of parts is reduced, so that the production cost is reduced. If the appearance design is changed, it can be handled only by changing the shape of the housing.

[Brief description of the drawings]

FIG. 1 is a perspective view of a general-purpose engine using an air cleaner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the air cleaner according to the embodiment of the present invention.

3 is a cross-sectional view of the air cleaner according to the embodiment of the present invention, which is a cross-sectional view taken along line AA shown in FIG.

FIG. 4 is a cross-sectional view of the air cleaner according to the embodiment of the present invention, which is a cross-sectional view along the line B-C-D-B shown in FIG.

FIG. 5 is a view according to the embodiment of the present invention, and is a cross-sectional view when a composite element is attached to an air cleaner.

FIG. 6 is a view according to the embodiment of the present invention, and is a cross-sectional view when a thick wet element is attached to the air cleaner.

FIG. 7 is a sectional view showing a configuration of an air cleaner according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Air cleaner 2 ... Recoil starter 3 ... Fuel tank 4 ... Operation panel 5 ... Protective cover 6 ... Cylinder protective cover 7 ... Vaporizer 10 ... Housing 10a-10e ... Holding rib 11 ... Element casing 11a ... Housing box 12 ... Dry cleaner Element 13 ... Element support frame 14 ... Holding frame 15 ... Bolt 16 ... Bolt 17 ... Air intake port 18 ... Air discharge port 21 ... Wet cleaner element 22 ... Wet cleaner element (thick type)

Claims (2)

[Claims] 1. An element casing having a housing portion for a cleaner element and an air discharge port, the element casing being attached to an intake air intake of a carburetor, and a plurality of elements for holding the cleaner element and forming an air passage to the cleaner element. A housing having a rib and an air inlet, the housing being attached to the element casing.
An air cleaner for removing dust contained in intake air with the cleaner element, wherein the cleaner element is either a wet cleaner element or a dry cleaner element having a peripheral frame of an elastic material having the same fitting outer peripheral dimensions as the wet cleaner element. When the wet cleaner element is used, the wet cleaner element is directly pressed and installed by at least one rib of the plurality of ribs in the housing, and when the dry cleaner element is used, the plurality of ribs in the housing are used. By mounting the surrounding frame in an airtight manner with respect to the element casing via a holding frame supported in contact with at least one of the ribs, two types of cleaner elements can be selectively attached. An air cleaner characterized by: 2. A double cleaner element in which a wet cleaner element is superposed on a dry cleaner element is accommodated in the element casing, and the dry cleaner element is supported in contact with at least one of the plurality of ribs in the housing. The peripheral frame is installed by airtightly pressing it against the element casing via a pressing frame to be provided, and the wet cleaner element is directly pressed by at least one of the plurality of ribs in the housing, whereby the double The air cleaner according to claim 1, wherein a cleaner element can be attached.