JPH0114748Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an air cleaner for engines, etc.

(Prior art and its problems) Conventional air cleaners generally have elements arranged at right angles to the air flow direction, but in order to effectively utilize the area of the elements, for example, as in Japanese Utility Model Publication No. 60-3965, Air cleaners arranged diagonally have been developed. However, the air cleaner is tilted so that the upper side of the element is located on the air cleaner outlet side. Therefore, if you remove the element for cleaning etc. with dust attached to the element, the dust attached between the element supporting wall and the element will fall off and leak to the inside of the air cleaner (air discharge side). ) to fall.

In other words, although the structure is such that only the element can be removed, the entire air cleaner must be removed from the engine and cleaned in order to remove dust that has fallen into the air cleaner.

Furthermore, if the user uses the engine after cleaning only the element without noticing that dust has fallen into the air cleaner, the dust will be sucked into the engine and cause wear and seizure.

(Means for Solving the Problem) In order to solve the above problem, the present invention tilts the element with respect to the vertical position so that as it goes downward, it approaches the air discharge side of the air cleaner.

(Example) In FIG. 1 showing a longitudinal cross-sectional view of an air cleaner to which the present invention is applied, a plastic air cleaner case 1 is integrally equipped with an outer peripheral wall 4 and an element support wall 2, and has an inner peripheral side of the support wall 2. is integrally provided with an element seal wall 3, and is integrally provided with an air intake port 5 at its lower end. An air discharge port 7 is formed in the center of a vertical wall 6 on the carburetor side (right side) of the case 1, and a plurality of element supports 13 are formed radially around the discharge port 7. The vertical wall 6 is fixed to the inlet portion of the carburetor 10 (or inlet pipe) with a mounting screw 9 via a disk-shaped reinforcing plate 8. A plurality of air circulation holes 12 are formed in the reinforcing plate 8. The end face of the seal wall 3 on the cap side (left side) is inclined with respect to the vertical plane so that as it goes downward, it comes to the air discharge port side, and the element support 13, like the seal wall 3, also It is slanted so that it is on the discharge port side.

A hinge receiver 15 is formed on the upper end surface of the case 1, and a recessed portion in which the hinge 21 of the cap 20 engages is formed in the hinge receiver 15. The shaft portion 21a of the hinge 21 is fitted into the recess of the hinge receiver 15 against the elastic force of the hinge receiver 15.
A hook receiver 23 is formed on the lower end surface of the case 1, and a hole through which the hook 25 of the cap 20 is inserted is formed in the hook receiver 23. As shown in FIG. 4, the bent end portion of the hook 25 is inclined such that the engaging surface 25a thereof approaches the cap side as it goes downward, while the engaging surface 23a of the hook receiver 23 on the case side also slopes. It is inclined toward the cap 20 as it goes downward. That is, the lower end of the cap 20 should be placed in the direction (arrow A)
When an external force is applied in the direction), the engagement between the hook 25 and the hook receiver 23 becomes even stronger, and the cap 20
prevent it from coming off.

Further, an outward protrusion 26 is formed on the edge of the outer peripheral wall 4 of the case 1 on the cap 20 side.
It meshes with the engagement groove 27 of 0.

In FIG. 2, the outer peripheral wall 4 of the air cleaner case 1 is formed into a vertically long rectangle. The lower wall portion 2a of the element support wall 2 is formed horizontally above the inlet 5 separately from the outer circumferential wall 4, but the left and right side walls and the upper wall portion of the element support wall 2 are the left and right side walls of the outer circumferential wall 4. and the upper wall is used as is. Therefore, the suction port 5 serves as the element support wall 2.
On the upper side, it is formed into a rectangular shape like a castle wall. Hinge receiver 1 on the upper end of case 1
5 are formed in one pair on the left and right, and eight element supports 13 are formed radially, for example. The suction port 5 is divided into four sections by three partition walls 28. Four air circulation holes 12 are formed in the reinforcing plate 8 on the upper, lower, left and right sides.

In FIG. 3, the cap 20 is formed into a vertically long rectangle, and the hinge 21 is formed at the upper end so as to be flexible, and the hook 2 is formed at the lower end.
3 is formed. Two engagement grooves 27 are formed on the left and right outer peripheral walls, and two engagement grooves 27 are formed on the upper outer peripheral wall.
One piece is formed on the lower outer peripheral wall. There are many element holding pins 30 on the inner peripheral surface of the cap 20.
is formed so as to be distributed over almost the entire surface except for the portion corresponding to the suction port 5 in FIG.

As shown in FIG. 1, the element holding pins 30 protrude toward the case 1, and the amount of protrusion toward the case increases toward the center so that the surface connecting the tips of each pin 30 has a substantially partially spherical shape. It's getting smaller.
The vertical wall 20a of the cap 20, in the upper part from the suction port 5 part, has a vertical wall 20a that extends downwardly from the inlet 5 part to the case 1.
This ensures a sufficient air inflow space on the side of the suction port 5, and prevents large resistance from increasing in the portion where the intake air changes direction within the air cleaner.

The element 33 has a substantially rectangular shape when viewed in the direction of the arrow in FIG. 1, and is made of an elastic material such as polyurethane foam. It is fitted in an inclined position. That is, it is inclined with respect to the vertical plane so that as it goes downward, it approaches the air discharge port side. Element 33 is cap 20
is pressed toward the case side by the holding pin 30 of the element 33, so that the surface of the outer peripheral end of the element 33 on the case 1 side is pressed against the tip of the seal wall 3 over the entire circumference, and the center portion is pressed against the element support 13. The element support wall 2 is pressed, and the outer peripheral end surface is pressed against the inner peripheral surface of the element support wall 2. In this case element 3
3, the cap side is pressed into a partially spherical shape by the holding pin 30 as described above, so the portion facing the seal wall 3 is strongly pressed against the seal wall 3,
The pressing force exerted by the pin 30 becomes lighter toward the center. Note that the thickness of the element 33 in its free state may be constant.

The hinge 21 of the cap 20 is bent into a U-shape against the elastic force of the hinge 21, as shown in FIG. 1, when the cap 20 is connected to the case 1.

(Operation) During engine operation, air is sucked into the cap 20 through the lower end suction port 5, passes through the element 33 to remove dust, and is then sucked into the carburetor 10 through the discharge port 7. Most of the dust that is prevented by the element 33 accumulates within the element 33, but a portion of the dust also accumulates at the fitting portion between the outer circumferential surface of the element 33 and the inner circumferential surface of the element support wall 2.

When cleaning the element, use cap 20
Push up the lower end hook 25 to remove it from the hook receiver 23, rotate the cap 20 upward about the hinge 21, and remove it from the case 1. Next, the element 33 is removed from within the support wall 2, and the element 33 is cleaned. When the element 33 is removed, the dust that has accumulated between the outer circumferential end surface of the element 33 and the inner circumferential surface of the element support wall 2 falls off as described above, but as the element 33 moves downward, it moves toward the discharge port side. Since it is stored in an inclined position, the falling dust does not fall to the air outlet side. That is, it does not fall onto the seal wall 3 or into the discharge port 7.

When reinstalling the element 33 after cleaning, the hinge 21 of the cap 20 is engaged with the hinge receiver 15, and the element 33 is attached to the support wall 2.
After fitting the cap 20 into the inner circumferential surface of the cap in an inclined position, the cap 20 is rotated downward against the elastic force of the hinge 21 to engage the protrusion 26 in the engagement groove 27, and the hook 25 is inserted into the hook receiver 23. engage.

Note that falling dust may accumulate on the lower element support wall 2 when the element is removed as described above, but even if you forget to remove such dust,
When the element 33 is reattached, the dust is sealed between the lower seal wall 3 and the lower support wall 2, and there is no fear that it will be sucked into the carburetor 10 from the discharge port 7.

(Effect of the invention) As explained above, the invention has elements that
It fits into the inner circumferential surface of the element support wall of the air cleaner case, and is inclined with respect to the vertical position so that as it goes downward, it comes closer to the air outlet of the air cleaner. (1) When removing the element for cleaning etc. Even if dust accumulated between the inner circumferential surface of the element support wall and the outer circumferential end surface of the element falls, it does not fall toward the air discharge port side of the element.

That is, it is possible to prevent dust from entering the carburetor side when the element is removed. Furthermore, it is no longer necessary to remove the entire air cleaner for cleaning when cleaning the element, and cleaning can be streamlined.

(2) Since the elements are arranged at an angle,
Compared to the case where the element is arranged vertically, a larger dust removal area of the element can be ensured within a case space of a certain size, and the dust removal performance can be improved.

In addition, as shown in FIG. 1, the element support wall 2,
The element seal wall 3 and the element support 13 are integrally molded on the case 1, and the element holding pin 30
If the element 33 is integrally molded into the cap 20 and the element 33 is individually fitted into the support wall 2 and held by the pin 30 of the cap 20, the structure becomes simpler, the number of parts can be reduced, and the cost can be reduced. .

In addition, as shown in FIG. 1, if the air intake port 5 is provided at the lower end of the case 1 so that air enters from below and changes direction to enter the element 33, heavy dust will have difficulty entering the element 33, and the air will enter the element 33. The lifespan of can be extended.

Furthermore, if the vertical wall 20a of the cap 20 is inclined as shown in FIG. 1 to ensure a large passage area for the intake air direction change section, air resistance is reduced and air intake efficiency is improved.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of an air cleaner to which the present invention is applied, Figure 2 is a view of the air cleaner case in Figure 1 in the direction of the arrows, Figure 3 is a view of the air cleaner cap in Figure 1 in the direction of the arrows, and Figure 4 is the view of the air cleaner cap in Figure 1. FIG. 2 is an enlarged view of the bottom hook portion of FIG. 1; 1... Air cleaner case, 2... Element support wall, 3... Element seal wall, 20... Cap, 33... Element.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The element is fitted onto the inner circumferential surface of the element support wall of the air cleaner case in such a way that it is tilted with respect to the vertical position so that it approaches the air discharge port of the air cleaner as it goes downward. An air cleaner that is characterized by its high density. (2) An element seal wall is provided inside the element support wall, and the tip of the element seal wall is inclined with respect to the vertical position so that it approaches the air outlet of the air cleaner as it goes downward, and the element is attached to the seal wall using a cap. The air cleaner according to Claim 1 of the Utility Model Registration Claim, which is pressed against the tip of the air cleaner. (3) The air cleaner according to claim 1 or 2, wherein the air intake port is provided at the lower end of the air cleaner.