JPS5919778Y2 - Engine breather device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a reed valve type breather device installed in an engine.

As is well known, a reed valve type breather device includes a breather plate, a reed valve fixed to the breather plate, and an opening restriction plate for the reed valve, and a breather cover fixed to the outside of the breather cover is bulged outward. A breather valve chamber is formed inside it,
A boss part for connecting the breather pipe is deep-drawn to protrude from the breather cover, and the breather pipe is externally fitted and fixed to this boss part, but since the inner diameter of the breather pipe is small, drawing alone is not enough. It is not possible to obtain a sufficient amount of protrusion, and other pipes have to be welded, which increases the number of parts, and
There is also a problem that the number of assembly steps increases.

Therefore, there is a device in which a breather pipe is inserted and fitted into an outlet hole opened in the breather cover, but this device has the following drawbacks.

That is, as shown in FIG. 4, the end of the breather pipe 22 attached to the breather cover 21 hits the open channel restriction plate 23 and is blocked, making it impossible to act as a breather.

In order to prevent this, it is possible to make the open channel regulating plate 23 smaller so that it does not hit the end of the breather pipe 22, as shown in Fig. 5, but this time, when the reed valve 24 is opened, This will block the breather pipe 22, making it impossible to solve the problem.

In addition, the tip of the breather pipe 22 is cut diagonally as shown by the imaginary line 25 in FIGS.
It is conceivable to prevent the breather pipe 22 from being blocked by the reed valve 24.

However, it takes more effort to process the end of the breather tube 22, and it also takes more effort to properly align the inclination direction of the tip when assembling, that is, inserting the breather tube 22.

This idea solves the above-mentioned drawbacks, and in order to prevent the breather pipe from being blocked by the open channel regulation plate and reed valve, the position of the inlet of the breather pipe is regulated on the part of the open channel regulation plate facing the breather pipe. The most distinctive feature is that it has a separate section.

Examples of this invention will be described below with reference to the drawings.

Figure 1 is a longitudinal sectional side view of the main parts of an air-cooled vertical side valve engine, Figure 2
The figure is a longitudinal sectional front view of the main part.

In the figure, blow-by gas leaking from the combustion chamber 1 of the engine into the crank chamber 2 passes through the outlet hole 3, the tappet chamber/bnozer chamber 4, the breather device 5, the breather valve chamber 6, and the breather pipe 7, and then passes through the air cleaner 8. sucked into the air chamber.

The breather chamber 4 is recessed in the upper part of the front wall of the crankcase 9, and a breather cover 10 is fixed to the outer opening of the breather chamber 4 with bolts 11.

An insertion hole 12 for the breather tube 7 is formed in the front wall of the cover 10, and the breather tube 7 made of rubber is fitted into the insertion hole 12.

The breather device 5 is a breather plate (back wall of the breather valve chamber 6)
13, a reed valve 15 for opening and closing the inlet hole 14, and an open channel regulating plate 16 located outside the valve 15 for regulating the maximum opening amount of the valve 15.

The valve 15 and the regulation plate 16 are fixed to the breather plate 13 with a rivet 18 along with a deflector 17 on the back side of the breather plate 13.

Reference numeral 19 denotes a position regulating portion of the lower inlet a of the breather pipe 7, which is formed by cutting and raising substantially the center of the open channel regulating plate 16, as shown in FIG.

Next, the effect will be explained.

When the breather pipe 7 is inserted into the breather pipe insertion hole 12 of the breather cover 10, the lower part a of the breather pipe 7 comes into contact with a position regulating portion 19 formed by cutting and raising the open channel regulating plate 16.

Furthermore, since the center of the breather pipe 7 is shifted upward by L from the center of the position regulating portion 19 (FIG. 2), there is always a gap between the lower part a of the breather pipe 7 and the regulating plate 16. The blow-by gas is sent to the air cleaner 8 through this gap.

In the above embodiment, the position regulating portion 19 is formed by cutting and bending the regulating plate 16, but it is conceivable that a separate member is fixed to the regulating plate 16 and the position regulating portion 19 is provided in a protruding manner.

In short, it is sufficient to prevent the inlet lower part a of the breather pipe 7 from coming into direct contact with the regulating plate 16. Since this invention is constructed as described above, the following effects are achieved.

That is, since the position regulating part of the breather pipe inlet is formed in the part of the open channel regulating plate facing the breather pipe, even if the breather pipe is inserted into the breather chamber, the position regulating part prevents the breather pipe from being received. Since the inlet of the breather pipe is not blocked by the open channel restriction plate, blow-by gas can be normally discharged to the outside of the crankcase.

Furthermore, the structure is as simple as forming a position regulating part on the open channel regulating plate, and there is no need to cut the tip of the breather pipe diagonally as in the conventional example, and it can be implemented at low cost, and It can also be applied to products.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; FIG. 1 is a schematic vertical side view of an air-cooled vertical side valve engine, FIG. 2 is a vertical front view of the main part,
FIG. 3 is a sectional view taken along the line III--III in FIG. 2, and FIGS. 4 and 5 are views corresponding to FIG. 3, respectively, showing a conventional example. 6...breather valve chamber, 7...breather pipe, 7a...7 population, 13...6 back wall (breather plate), 14. ...Entrance hole, 15.
...Reed valve, 16...Drainage regulation plate, 1
9...Position regulation section.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ In addition to opening the inlet hole 14 in the back wall 13 of the breather valve chamber 6, the back wall 13 in the breather cover 10.21
In a breather device in which a breather tube insertion hole is formed in the wall facing the opposite wall, and the breather tubes 7 and 22 are fitted and fixed in the breather tube insertion hole, a reed valve 15 for opening and closing the artificial hole 14 and a reed valve 15 for opening and closing the artificial hole 14 and a The open channel regulation plate 16 that regulates large amounts of water is connected to the back wall 13.
The lower inlet a of the breather pipe 7, which is fixed to the breather cover 10 by being fitted inside the breather cover 10, faces in front of the open channel regulation plate 16, and the lower inlet a of the breather pipe 7 is attached to the part of the regulation plate 16 facing the breather pipe 7. A breather device for an engine, characterized in that a position regulating portion 19 is formed. 2. In the engine breather device set forth in claim 1 of the utility model registration claim, the position regulating portion 19 is connected to the open channel regulating plate 1.
It was shaped by 6.