JPS603965Y2 - air cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air cleaner used in internal combustion engines, particularly small general-purpose engines.

Figure 1 is a sectional view showing an example of a conventional air cleaner;
The figure is a view taken in the direction of the ■ arrow in FIG.

In the figure, the main body 20 of the air cleaner is made of plastic and is integrally molded except for the replacement lid 22 of the element 21.

Reference numeral 23 denotes a mounting member that is fixed together with the engine cover 24 to a boss 25 on the engine body side with bolts or the like.

The partition wall 26 is provided over the entire width of the air cleaner main body 20.

The upper part 27 of the partition wall 26 has a wall 28 bent at right angles toward the lid 22, and the wall 28 is connected to the front surface 2 of the air cleaner body 20.
It communicates with a grid-like partition wall 30 extending from 9.

At the lower part 31 of the partition wall 26, pipes 32 and 33 having bolt insertion holes for fixing the air cleaner main body 20 to the carburetor (not shown) are integrally provided between the front surface 29 and a ventilation hole 34. ing.

Reference numeral 35 designates an element holding member made of plastic, which has a lattice shape and includes an upper part 27 of the partition wall 26, a bottom wall 36 connecting the front surface 29 and the partition wall 30, and a side wall 3 of the main body 20.
It is inserted into the rectangular space surrounded by 7 and 38,
The element 21 is held between the holding member 35 and the grid-like partition wall 30.

That is, the element holding member 35 is fitted into a folded section in which a lattice-like surface that crosses the air passage on one edge side of the circumferential surface is placed on the engine side, and the other edge side is opened outward. It is designed to be retained.

Furthermore, a protrusion 39 is integrally formed on the front surface of the holding member 35, and is adapted to press against the element 21 when the lid 22 is closed as shown by the solid line in FIG.

The lid 22 is rotatable around a hinge 40 that is integrated with the main body 20, but when the lid 22 is closed as shown by the solid line in FIG. It has a mating protrusion 42 at its lower end.

Reference numeral 43 denotes a recessed portion with which a finger comes into contact when opening and closing the lid 22.

In the above air cleaner, the air taken in from around the side walls 37 and 38 of the air cleaner body 20 that opens above the carburetor enters the air cleaner body 20, and enters the air vent 34 from the internal air passage as shown by the arrow in FIG. After that, it is inhaled into a vaporizer (not shown).

When inspecting the degree of contamination of the element 21 or replacing it, with the air cleaner body 20 fixed to the engine body, put your finger on the recess 43 of the lid 22 and push the lid 22 upward, and the hinge 40 will be elastically deformed. Therefore, the protrusion 42 is the protrusion 4
It can be separated from 1 and rotated easily.

When replacing the element 21, the element 21 can be easily replaced by pulling out the element holding member 35 toward you, then pulling out the element 21, and inserting it by pushing it in in the reverse order.

However, in the above conventional system, the air taken into the air cleaner body 20 flows as shown by the arrow in FIG.
Because there are three places where the airflow passes through at right angles, and because the area through which the air passes is constricted in part A, the flow path resistance becomes excessive, making it impossible to obtain a smooth airflow. There was a problem.

The present invention was developed in view of the above, and an object of the present invention is to provide an air cleaner that has low air flow path resistance and is easy to maintain.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 to 6. Reference numeral 21 denotes an element, 56 an upper outer plate which is fixed together with the engine cover 24 to the boss 25 of the engine body with bolts or the like. 51 is a partition wall provided behind the element 21, 52 is an element supporting wall in which a folded opening 52a is formed, and 72 is provided above the element 21 to connect the inside of the engine cover 24 and the space on the upstream side of the element (lid 54). and the space defined by the element 21).

That is, the air introduction lower 2 is defined above the element 21 by the supporting wall 55 and the inner surface of the outer panel 56.

As shown in FIG. 3, the element 21, partition wall 51, and element support wall 52 are provided with their upper portions inclined toward the engine cover 24.

In addition, a replacement lid 5 for the element 21 is provided at the top of the partition wall 51.
A wall 55 is provided which is bent at right angles to the 4 side and supports the element 21, and the wall 55 and the upper outer panel 56 are connected to a rib 57.
are connected and integrated.

A bag portion 58 is formed below the partition wall 51, and the bag portion 58
As shown in FIG. 6, at the upper part of the vent hole 34, it protrudes toward the carburetor (not shown) to enlarge the flow path area.

Note that the passage area of the upper bag portion 58 is formed to be larger than at least the passage area of the vent 34 to the vaporizer.

29 is the front plate, 32.33 is the pipe for inserting the bolt, 6
4.65 is the side wall.

The air cleaner main body 50 is constituted by each of the above members.

The replacement lid 54 of the air cleaner is rotatable around a pin 71 provided on a hinge 59 formed integrally with the element body 50.

Furthermore, when the lid 54 is closed as shown by the solid line in FIG. By bending it, the hook 60 and the protrusion 61 are brought into engagement.

Projections 63 are provided on both sides of the element holding member 62, and the projections 63 are connected to the side walls 64 of the air cleaner main body 50.
The element 21 is held between the holding member 62 and the lattice-shaped partition wall 52 by loosely inserting the element 21 into a hole 66 formed in the hole 65 .

In the air cleaner having the above configuration, the air taken into the air cleaner body 50 from the air introduction lower 2 is
As shown by the arrow in the figure, the air flows through the element 21, is filtered, and is sucked into a vaporizer (not shown) through the inside of the partition wall 51, the bag portion 58, and the vent 34.

In this case, the partition wall 51 of the element 21, the element support wall 52, etc. are provided at an angle as described above, and the flow path area is not narrowed due to the presence of the bag portion 58, so the air is extremely After flowing through the air cleaner without being distorted or throttled, it is sent to the vaporizer.

When replacing or servicing element 21, use the replacement M5
Remove the protrusion 61 of 4 from the hook 60 and attach the lid 54 to the pin 71.
Rotate it around and place it at the position indicated by the chain line in Figure 3.

It should be noted that the replacement lid 54 may be opened and closed upwards as shown in FIGS. 1 and 2.

The present invention is constructed as described above. According to the present invention, there is no place in the air flow path in the air cleaner where the air flow is suddenly bent or constricted, so it is different from the conventional one. In comparison, resistance loss in the air flow path is significantly reduced.

Further, since the element and the surrounding members are inclined toward the air inlet side, the front surface area of the element can be increased compared to the conventional one.

Furthermore, since the element can be replaced and maintained easily, the efficiency of air cleaner inspection and maintenance work is improved.

[Brief explanation of the drawing]

Figures 1 and 2 show an example of a conventional air cleaner,
Figure 1 is a sectional view taken along line I-I in Figure 2, and Figure 2 is a cross-sectional view of the
It is a view seen in the direction of the arrow ■ in the figure. 3 to 6 show one embodiment of the present invention, FIG. 3 is a view corresponding to FIG. 1, and FIG. 4 is in the direction of the arrow ■ in FIG.
5 is a view taken in the direction of the arrow V in FIG. 3, and FIG. 6 is a view taken in the direction of the arrow ■ in FIG. 3. 21...Element, 34...Vent, 51...Partition wall, 54...Replacement lid, 58...Bag portion.

Claims (1)

[Scope of utility model registration request] An element is housed in an outer plate attached to the engine cover and a lid attached to the outer plate via a hinge, and is located above the element and is partitioned by a wall for supporting the element and the outer plate. Combustion air introduced from the air inlet is passed through the element, passed through a passage defined between the element and a partition wall provided behind it, and then passed through the air vent located below the element. In an air cleaner of a type in which the air is supplied from an opening to a carburetor connected to the vent, the element is arranged with its upper part inclined toward the engine cover, and the air is located between the outlet of the element and the vent. An air cleaner characterized in that a bag portion having a passage area larger than the vent hole is formed in the air passage formed inside the outer plate.