JP4412782B2 - air cleaner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air cleaner that removes fine dust and the like from taken air and supplies clean air to an engine or the like.
[0002]
[Prior art]
An air cleaner is provided in, for example, an intake system of a vehicle engine, and removes fine dust and dust from the taken-in air and cleans it. Such an air filtering action suppresses the progress of wear of the cylinder and prevents a decrease in engine life.
[0003]
Such an air cleaner takes outside air from the air inlet, passes the filter medium, and discharges it from the air outlet. An air introduction pipe for introducing air is attached to the air inlet, whereby the outside air is efficiently introduced into the cleaner case.
[0004]
[Problems to be solved by the invention]
However, in the conventional air cleaner, since the air introduction pipe is externally attached to the air inlet of the cleaner case and the connecting portion is sealed by a separately prepared clamping device, assembly is troublesome. Moreover, since the outside air introduced into the cleaner case through the air introduction pipe tends to pass through the filter medium without spreading inside the cleaner case, the filter medium is locally clogged, In some cases, the service life was reached in a shorter period.
[0005]
The present invention has been made in view of such problems, and it is an object of the present invention to provide an air cleaner having a structure capable of suppressing the manufacturing cost by facilitating the attachment of the air introduction pipe and preventing the life of the filter medium from being reduced. It is aimed.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, an air cleaner according to the present invention includes a cleaner case in which an air inlet and an air outlet are formed, a filter material for air filtration provided in the cleaner case, and a cleaner from the air inlet. A cap part that is inserted in the case and is detachably covered at the air inlet, and has an air inlet pipe that is detachably fixed to the inner wall of the cleaner case. Is done.
[0007]
Insert the air introduction pipe into the cleaner case and cover the air inlet with a cap provided in the middle to seal the connection between the air introduction pipe and the air inlet, and place the tip on the inner wall of the cleaner case. By fixing it, the air introduction tube is prevented from falling off the cleaner case. This eliminates the need for the clamp device that was conventionally required when attaching the air inlet tube to the air inlet, but the portion corresponding to this clamp device (cap portion) can be molded integrally with the air inlet tube, The number of parts can be reduced, the assembly process can be simplified, and the manufacturing cost can be reduced. Further, since the air introduction pipe is detachable from the cleaner case, it can be easily replaced.
[0008]
Further, the tip portion of the air inlet tube extending substantially parallel to the plane of the air inlet side of the filtering material, Ri our outlet opening of the air inlet tube to face the inner wall surface and oblique cleaner case, air inlet pipe Since the outside air taken into the cleaner case from the outlet opening of the filter hits the inner wall surface of the cleaner case and passes through the filter medium in a state of spreading over the entire filter medium (filtered), the filter medium is clogged locally. Thus, it is possible to prevent a decrease in the life of the filter medium.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 to 4 are views showing an example when the present invention is applied to an air cleaner used for an intake system of an engine of a small machine. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. A bottom view and FIG. 4 are partial sectional rear views. As shown in these drawings, the air cleaner 1 includes a cleaner case upper half 20 and a cleaner case lower half 30. The cleaner case 10 has a hollow interior, and both the case halves 20 and 30. And a filter medium 40 for air filtration (see FIG. 4) located in the hollow portion in the cleaner case 10.
[0010]
On the front side of the cleaner case upper half 20 (the front side in FIG. 1), a hollow tube portion 22 extending in a diagonally forward direction is formed so as to project, and an air inlet 21 is provided at the tip thereof. (See FIGS. 2 and 3). The cleaner case lower half 30 is formed with an air outlet 31 that opens laterally (rightward in FIG. 1) (see FIG. 4). The filter medium 40 is made of a non-woven fabric, and is formed at the center of each of the filter medium sandwiching portions 23 and 33 and both the case halves 20 and 30 formed along the outer peripheral edges of the both case halves 20 and 30. The filter medium clamping portions 24 and 34 (both see FIG. 4) are clamped and attached (see FIG. 3 for the filter medium mounting portions 23 and 24). Further, the cleaner case upper half 20 and the cleaner case lower half 30 are coupled to each other by a plurality of screws B at the peripheral and central portions of both case halves 20 and 30.
[0011]
An air introduction pipe 50 that can be elastically deformed (for example, made of rubber) is detachably attached to the upper half body 20 of the cleaner case. As shown in FIG. 5, the air introduction pipe 50 has a cap 53 formed at the boundary between the outer pipe 51 and the inner pipe 52. The inner pipe 52 has an ear portion 54 having a locking hole 54a. Is provided. The air introduction pipe 50 is inserted into the cleaner case 10 from the air inlet 21, and a cap portion 53 is detachably covered on the air inlet 21. As a result, the connection between the air inlet 21 and the air introduction pipe 50 is sealed, whereby the outer pipe 51 is located outside the cleaner case 10 and the inner pipe 52 is located inside the cleaner case 10. When the cap portion 53 is attached to the tube portion 22, the positioning protrusion 22 a formed on the tube portion 22 is made to fit within the notch 53 a provided on the cap portion 53 as shown in FIG.
[0012]
The locking hole 54a of the ear portion 54 is fitted into a locking projection 25 (see FIG. 4) that protrudes downward from the inner wall surface of the cleaner case upper half 20, thereby the tip of the air introduction tube 50. The part is in a state of being detachably fixed (locked) to the inner wall of the cleaner case 10. As a result, the front end portion (inner tube 52) of the air introduction tube 50 extends substantially parallel to the surface of the filter medium 40 on the air inlet 21 side (the upper surface of the filter medium 40 in FIG. 4). 55 is in a state of facing diagonally to the inner wall surface 11 of the cleaner case 10 (see FIG. 3).
[0013]
An air discharge pipe 60 is detachably attached to the air outlet 31 of the cleaner case lower half 30. As shown in FIG. 4, the air discharge pipe 60 is attached so that two parallel ring portions 61 and 62 formed on the outer periphery are fitted into a hole edge 31 a forming the air outlet 31, and the outlet opening thereof 62 is directed slightly below the cleaner case 10.
[0014]
As shown in FIG. 2, a fixed arm portion 26 is formed in the cleaner case upper half 20, and a plurality of screw mounting holes 27 are provided in the fixed arm portion 26. The cleaner case lower half 30 is also provided with a plurality of screw mounting holes 37, and these screw mounting holes 27, 37 are screwed to a support frame (not shown) so that the air cleaner 1 is placed at a predetermined position. Can be installed. The air introduction pipe 50 is connected to a duct (not shown), and the air outlet 31 is connected to the intake passage of the engine via a hose (not shown). Then, with the cleaner case 10 attached in this way, outside air is guided from the air introduction pipe 50 into the cleaner case 10, and the filter medium 40 is passed through and discharged from the air outlet 31. In this process, the filter medium 40 filters fine dust and dust contained in the outside air, so that clean air is sent to the engine.
[0015]
Although the present air cleaner 1 is used in this way, the air inlet tube 50 is inserted into the cleaner case 10 and the air inlet 21 is covered with a cap portion provided in the intermediate portion to The connection portion with the air inlet 21 is sealed, and the tip portion (inner tube 52) is fixed to the inner wall surface of the cleaner case 10 to prevent the air introduction tube 50 from falling off the cleaner case 10. This eliminates the need for a clamping device that has been conventionally required when the air introduction tube is attached to the air inlet, but the portion (cap portion 53) corresponding to this clamping device can be molded integrally with the air introduction tube 50. Therefore, the number of parts can be reduced, the assembly process can be simplified, and the manufacturing cost can be suppressed. Further, since the air introduction tube 50 is detachable from the cleaner case 10, it can be easily replaced.
[0016]
Further, the front end portion (inner tube 52) of the air introduction pipe 50 extends substantially parallel to the surface of the filter medium 40 on the air inlet 21 side, and the outlet opening 55 of the air introduction pipe 50 is the inner wall surface 11 of the cleaner case 10. Therefore, the outside air that has flowed into the cleaner case 10 from the outlet opening 55 strikes the inner wall surface 11 of the cleaner case 10 and is dispersed and passes through the filter medium 40 in a state of spreading over the entire filter medium 40 (filtering). ) For this reason, clogging of the filter medium 40 does not occur locally, and the life of the filter medium 40 can be prevented from being reduced.
[0017]
Although the embodiment of the air cleaner according to the present invention has been described so far, the scope of the present invention is not limited to that shown in the above embodiment. For example, the method of fixing the distal end portion (inner tube 52) of the air introduction tube 50 to the inner wall of the cleaner case 10 is not limited to the method using the locking protrusion 25 and the locking hole 54a as described above. This method may be used. Moreover, in the said embodiment, although the filter medium 40 consisted of the nonwoven fabric, it may not necessarily be a nonwoven fabric and may be paper-made. Further, the present air cleaner is not limited to the intake system of an engine of a small machine as in the above embodiment, and can be widely applied to other machines and devices.
[0018]
【The invention's effect】
As described above, in the air cleaner according to the present invention, the air introduction tube is inserted into the cleaner case, and the air inlet is covered with the cap portion provided in the intermediate portion so that the air introduction tube and the air inlet are separated. The connection part is sealed, and the tip part is fixed to the inner wall surface of the cleaner case to prevent the air introduction pipe from falling off the cleaner case. This eliminates the need for the clamp device that was conventionally required when attaching the air inlet tube to the air inlet, but the portion corresponding to this clamp device (cap portion) can be molded integrally with the air inlet tube, The number of parts can be reduced, the assembly process can be simplified, and the manufacturing cost can be reduced. Further, since the air introduction pipe is detachable from the cleaner case, it can be easily replaced.
[0019]
In addition, it is preferable that the front end portion of the air introduction pipe extends substantially parallel to the air inlet side surface of the filter medium, and the outlet opening of the air introduction pipe is diagonally opposed to the inner wall surface of the cleaner case. By doing so, the outside air taken into the cleaner case from the outlet opening of the air introduction pipe is dispersed by hitting the inner wall surface of the cleaner case and passes through the filter material in a state of being spread over the entire filter material (filtered). The clogging of the filter medium does not occur locally, and the life of the filter medium can be prevented from being reduced.
[Brief description of the drawings]
FIG. 1 is a front view of an air cleaner showing an embodiment of the present invention.
FIG. 2 is a plan view of the air cleaner.
FIG. 3 is a partial sectional bottom view of the air cleaner.
FIG. 4 is a partial cross-sectional rear view of the air cleaner.
FIG. 5 is a perspective view of an air introduction tube in the air cleaner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air cleaner 10 Cleaner case 21 Air inlet 25 Locking protrusion 31 Air outlet 40 Filter material 50 Air introduction pipe 53 Cap part 54 Ear part 54a Locking hole

Claims (1)

A cleaner case having an air inlet and an air outlet;
A filter medium for air filtration provided in the cleaner case;
An air inserted into the cleaner case from the air inlet, a cap portion provided at an intermediate portion detachably covering the air inlet, and a tip portion detachably fixed to the inner wall of the cleaner case have a and the inlet tube,
The tip of the air introduction pipe extends substantially parallel to the air inlet side surface of the filter medium, and the outlet opening of the air introduction pipe is diagonally opposed to the inner wall surface of the cleaner case. An air cleaner characterized by

Images