JP2555396Y2 - Air cleaner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an improvement of a cylindrical air cleaner mainly made of synthetic resin.

[0002]

2. Description of the Related Art An example of a cylindrical air cleaner used in a large vehicle such as a truck or a construction vehicle such as a bulldozer is shown in FIG. 4, which is made of a synthetic resin, has a cup shape, and has an open end. A body 1 having an inlet pipe 1a provided in a tangential state, a cover 2 provided with a cylindrical air guide 2a having a smaller diameter than the body, and a filter medium such as filter paper are formed in a cylindrical shape. A plate 3a is attached, and a filter element 3 having a dish-shaped blind end plate 3b attached to the other end is provided. At the outlet end of the body 1, an air guide on the outlet side and a dish-shaped iron made of legs are provided. The auxiliary body 4 is disposed concentrically, and the end walls are arranged at a plurality of locations (usually 1).
(2 places), and an iron outlet pipe 5 connected to the intake pipe of the engine is fitted and spot-welded into the leg tube portion, and a bifurcated bridge 6 made of an iron strip is attached to the outlet pipe 5. Are attached by spot welding, and a center bolt 7 inserted and held at the tip of the bridge 6 penetrates through the blind end plate 3b of the filter element 3 and the center of the cover 2, respectively, and The nut members 8 are screwed in, respectively, and the respective parts are integrally assembled.

[0003]

Recently, the use of synthetic resin has been promoted for the purpose of reducing the weight and cost of the air cleaner. However, the bridge 6 and the center bolt 7, which are the entire assembly members, are not provided with the air cleaner. It must be made of metal (usually made of iron)
Since the attachment of the bridge 6 has hitherto been performed by spot welding, the outlet pipe 5 to which the base end of the bridge is to be attached must be made of iron so that it can be welded, and the outlet pipe 5 is fixed. The part of the body to be used must be made of metal, and the auxiliary body 4 made of iron must be riveted to the body 1 made of synthetic resin.

[0004] As described above, the above-mentioned conventional air cleaner is made of resin, but still has several metal parts, the effect of reducing the weight and cost is insufficient, the number of parts is large, and The periphery of the fixed portion of the auxiliary body 4 with respect to the body 1 and the periphery of the joint with the outlet pipe 5 must be sealed by applying a sealant S, which is troublesome. Poorly, the bridge 6 is liable to be distorted by welding heat to the outlet pipe 5, and may be deformed to make the attachment of the filter element 3 incomplete.

Accordingly, an object of the present invention is to make it possible to easily attach an assembling member without using welding means, and to further reduce the number of parts to further reduce the weight and cost.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned object, the present invention provides a cylindrical air cleaner by integrally molding an inlet pipe at one end of a synthetic resin cup-shaped body and an outlet pipe at the other end. A protrusion is formed on the inner surface of the outlet pipe, and a metal bridge and a center bolt are formed in the body, and an engagement portion for preventing rotation is provided on a mounting base of the bridge, and a hook portion is provided on the end surface. The assembling member provided is inserted and arranged via an outlet pipe, the latching portion is engaged with an end face of the outlet pipe, and the engaging portion is engaged with a projection of the outlet pipe and mounted. At least a cylindrical filtering element is attached to the center bolt, and a synthetic resin cover is provided at one end of the body.

[0007]

1 and 2 show one embodiment of the present invention. Reference numeral 11 denotes a cup-shaped body made of synthetic resin and having one end opened, and an inlet pipe 11a provided on one end on the open side. Is in a tangential state, and an outlet pipe 11b connected to the intake pipe of the engine extends axially outward at the center of the other end.
Further, at the other end, a cylindrical outlet side air guide 14 slightly smaller in diameter than the body is provided by integral molding so as to protrude inward.

A plurality (two in the figure) of projections 15 are provided at the center of the inner surface of the outlet pipe 11b and are inclined high toward the body side.
And a center bolt 17 which is inserted and supported at the tip of the forked bridge 16. A hook-shaped latching portion 16 b is formed on the end surface of the mounting base 16 a of the forked piece, and an outlet is provided in the middle of the mounting base 16 a. Assembling members T each having an engagement window hole 16c so as to fit with the projection 15 of the pipe are inserted and arranged from the outlet pipe 11b with the center bolt 17 first, and the hooking portion 1 at the bridge end is provided.
6b are respectively engaged with the end face of the outlet pipe 11b, and at the same time, the projection 15 in the outlet pipe is attached to the mounting base 16 of the fork.
It is engaged with each of the window holes 16c of FIG.

A filter element 13 having a filter medium such as filter paper formed in a cylindrical shape and having an annular end plate 13a attached to one end and a dish-shaped blind end plate 13b attached to the other end.
1, a cover 12 integrally provided with a cylindrical inlet side air guide 12a made of a synthetic resin is provided at the open end of the body 11 through the air guide 12a. The center bolt 17 of the assembling member T attached to the outlet pipe 11b is butted so as to cover the inlet end of the element 13, and passes through the blind end plate 13b of the filter element 13 and the center of the cover 12,
A nut member 18 is screwed into each through portion,
The filtration element 13 and the cover 12 are integrally assembled with the body 11. However, the cover 12 may be attached to the periphery of one end of the body 11 by a butting clip member without using the center bolt 17. Reference numeral 19 denotes a rubber bag-shaped discharge valve attached to the end of the body 11 on the outlet side.

In use, the outside air taken into the body 11 from the inlet pipe 11a by the operation of the engine turns toward the outlet side while turning around the air guide 12a, and large dust contained in the outside air is removed by the air flow. And the air flow is further purified across the filtration element 13 and flows to the engine side from the outlet pipe 16, and the dust entering the discharge valve 19 is discharged from the intake pipe. The valve is opened and closed automatically for pulsating operation based on the pressure change and is automatically discharged.

FIG. 3 shows a modified example of an assembling member T in which the mounting base 16a of the bridge 16 is formed in a cylindrical shape and the engaging portion 16b on the end face is formed in a brim shape. In this manner, the mounting base 16a is formed in a cylindrical shape. With this configuration, the reinforcing effect on the outlet pipe 11b made of synthetic resin can be improved. When the mounting base 16a is formed in a cylindrical shape, the projection engaging portion provided therein may be slit as shown by a dotted line in place of the window hole 16c, while the projection 15 of the outlet pipe is not wedge-shaped. The protrusion may be flat, and the number of protrusions and the engagement portions may be one instead of a plurality. Further, in the illustrated example, the inlet pipe 11a is provided tangentially to the body 11 and the discharge valve 19 is provided to perform the cyclone separation. However, the inlet pipe 11a is directed toward the axis without providing the inlet pipe 11a tangentially. Alternatively, the discharge valve 19 may be omitted.

[0012]

As described above, in the present invention, an inlet pipe and an outlet pipe are integrally formed on a cup-shaped body as a synthetic resin cylindrical air cleaner, and a projection is formed in the outlet pipe, and the assembly is performed. An engaging portion for preventing rotation is provided on the mounting base of the bridge of the member, and a latching portion is provided on the end surface, the latching portion is latched on the end surface of the outlet pipe, and the engaging portion is formed on a protrusion in the outlet pipe. As the assembly member is attached to the body by engaging, the entire body can be made of synthetic resin, and the number of parts is smaller and more cumbersome than the conventional one that is partially made of synthetic resin. There is no need for welding work or riveting work, making it possible to reduce the weight and cost of the air cleaner.Furthermore, the mounting members are easy to install, and they are securely in place without deformation or distortion. Held, no inconvenience in assembly of the filter element and cover.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a perspective view of an example of an assembly member.

FIG. 3 is a perspective view of a modified example of an assembly member.

FIG. 4 is a sectional view of a conventional cylindrical air cleaner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Body 11a Inlet pipe 11b Outlet pipe 12 Cover 12a Air guide 13 Filtration element 14 Air guide 15 Projection 16 Bridge 16a Mounting base 16b Latch 16c Window hole 17 Center bolt T Assembly member

Claims (1)

(57) [Scope of request for utility model registration] 1. An inlet pipe is integrally formed at one end of a synthetic resin cup-shaped body, and an outlet pipe is integrally formed at the other end, and a projection is formed on an inner surface of the outlet pipe. An assembly member comprising a bridge made of steel and a center bolt, provided with an engagement portion for preventing rotation at the mounting base of the bridge, and provided with a locking portion on the end face, is inserted and arranged via an outlet pipe, and the locking portion is provided. To the end face of the outlet pipe, and the engaging portion is engaged with the projection of the outlet pipe for mounting. At least a cylindrical filtering element is mounted on the center bolt of the mounting member, and is combined with one end of the body. Air cleaner with resin cover.