JPS6211304Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a blow-by gas blazer device for a vertical shaft engine mounted on a small agricultural walking type management machine.

<Prior Art> In general, small agricultural management machines are easy to handle, and are sometimes used with the machine tilted forward and to the left and right, except at the rear where the handle extends. In addition, when transporting this small agricultural management machine, the handle and wheels can be removed and the management machine body can be tilted forward.
When changing the wheels, the control machine may fall on its side.

For small control machines that are expected to be used under such conditions, a blazer device is installed to prevent the oil in the crankcase from flowing out from the blazer device when the control machine is tilted steeply or tipped forward or sideways. must be placed. For this reason, a vertical shaft engine with a comparatively large amount of space on the upper surface of the crankcase is used in a small management machine.

Conventionally, as a vertical shaft engine with a blazer device placed in a position where oil does not flow out from the blazer device no matter which direction it is tilted,
The one shown in No.-25944 is known.

This has a ventilation hole that communicates with the outside air from inside the crankcase at the top of the crankshaft, which is installed through the upper wall of the crankcase, and a cooling fan and a large nut for tightening the starter cup at the top end of the crankshaft. are screwed together to form a breather chamber in the head of this nut. Therefore, in this case, the blazer device is located above the central portion of the engine in the front, rear, left, and right directions, and oil will not leak out even if the engine is operated in an inclined state.

<<Problems to be Solved>> However, in the above-mentioned conventional crankshaft, the ventilation hole is formed in the upper part of the crankshaft, so the processing to form the ventilation hole in the crankshaft is troublesome, and the strength of the shaft is reduced. There was a problem with the decrease in

Furthermore, since the blazer chamber is formed inside a nut screwed onto the upper end of the crankshaft, it is not possible to make the blazer chamber large, and in this type of engine, the recoil starter is installed above the cooling fan. It is difficult to provide a structure for supplying blow-by gas to the air cleaner because the device is normally placed in the air cleaner.

Furthermore, since the shaft end of the crankshaft protrudes beyond the top surface of the nut that forms the bottom wall of the blazer chamber, a separated oil reservoir is created within the blazer chamber.
The accumulated oil flows down along the outer periphery of the crankshaft through the screw gap. However, since the cooling fan is fixed to the crankshaft, there is a problem in that oil flowing down along the crankshaft is blown away by the cooling fan and contaminates the inside of the fan case.

《Means for solving the problem》 The present invention solves the above problem, and although it has a simple structure, the lubricating oil in the crankcase does not leak out no matter what tilted position the engine is in. This invention provides a blazer device for a vertical axis engine, and for this purpose, a blazer is installed near the center in the left-right direction at the rear of the upper wall of the crankcase, behind the rotation area of the cooling fan disposed on the upper side of the crankcase. The engine is characterized by forming a chamber, communicating the blazer chamber with the crank chamber through a blazer passage, and providing oil separation means in the blazer chamber.

《Operation》 In the present invention, in a vertical shaft engine installed in a walk-behind small agricultural management machine with a handle extending diagonally rearward and upward, the Since the blazer chamber is formed near the center in the left and right direction at the rear of the wall, the blazer chamber will be located higher than the lubricating oil level in the engine no matter what tilted position the control machine is in. Therefore, lubricating oil will not flow out of the blazer device.

Furthermore, since the blazer chamber is formed in the crankcase, it is easy to process and can also be formed to have a large volume.

Furthermore, since the blazer chamber is formed in the crankcase, which is a non-moving member, it can be reliably sealed and the separated oil will not contaminate the engine wall.

《Example》 Figures 1 and 2 show a small agricultural walking type management machine. That is, the side valve type vertical shaft engine 1 is supported via a reduction case 2, a transmission case 3, and an axle 4 by a pair of left and right claw wheels 5 which are replaceable therewith.

A protector 6 is fixed to the front part of the deceleration case 2, and a handle frame 7 is fixed to the deceleration case 2 and the transmission case 3 so as to be inclined backwardly. A handle 8 is removably attached to the upper part of the handle frame 7, and a resistance rod 9 is attached to the middle part thereof.

When the handle 8, resistance rod 9, and claw wheels 5 are removed, the body of the management machine becomes smaller, and by tilting the body forward and letting the protector 6 touch the ground, it can be loaded into the trunk of a passenger car and transported.

From FIG. 3 onwards, the side valve type vertical shaft engine 1 is shown. A cooling fan 11 that also serves as a flywheel, a bonnet 12, and a recoil starter 13 are disposed on a crankcase 10 of the engine 1. A fuel tank 1 is installed behind the cooling fan 11 inside the bonnet 12.
4 is arranged and fixed with a tank stay 15.

A cylinder 16 is integrally extended from the back wall of the crankcase 10 diagonally to the left rearward, and a tappet chamber 17 is formed on the right side of the cylinder 16. cylinder 1
A carburetor 34 and an air cleaner 18 are arranged on the right side of the air cleaner 6 . The tapepet chamber 17 is sealed with a lid 19.

The crankcase 10 and the cylinder 16 are formed as parts common to those for the transversely inclined cylinder engine, and a spare blazer chamber 20 for the transversely inclined cylinder engine is formed on the left side wall of the crankcase 10.

The blazer chamber 21 for the vertical axis engine is formed at the rear of the rotation area of the cooling fan 11, at the extending base of the cylinder 16, and at the rear of the upper wall of the crankcase 10 near the center in the left-right direction. A blazer passage hole 22 and an oil return hole 23 are formed in a dividing wall between the blazer chamber 21 and the crank chamber 24.

An oil separation means 25 is provided in the upper part of the blazer chamber 21, and includes a baffle plate 26, a blocking plate 27 and a cover plate 28. A blocking plate 27 and a lid plate 28 are closed and fixed in order to the upper opening of the blazer chamber 21. A blazer hole 29 is formed in the blocking plate 27, and this blazer hole 29
A breather valve 30 that opens and closes the valve and a valve opening amount limiting plate 31 are fixed to the upper surface of the blocking plate 27. A baffle plate 26 is fixed to the lower surface of the blocking plate 27 so as to cover and hide the blazer hole 29 from below.

A blazer outlet 32 is provided on the cover plate 28, and this blazer outlet 32 connects the air guide pipe 3 to the clean air chamber of the air cleaner 18.
Connect with 3.

Next, to explain its operation, the blow-by gas leaked from the combustion chamber of the engine into the crank chamber 24 is accompanied by lubricating oil droplets in the crank chamber 24, enters the breather chamber 2Z from the breather passage hole 22, and is passed through the oil separation means 25. After separating the lubricating oil, the air guide pipe 33,
The air is returned to the combustion chamber through the clean air chamber of the air cleaner 18 and the carburetor 34. The lubricating oil separated by the oil separation means 25 flows from the blazer chamber 21 through the oil return hole 23 to the crank chamber 24 and returns.

In addition, when driving, replacing wheels, or transporting, the control device should be rotated 60 to 90 degrees forward, left and right, and backward.
The blazer chamber 21 may be tilted at 45 degrees or tilted down, but in either case, the blazer chamber 21 is located higher than the lubricating oil level in the crankcase 10, so the crankcase 1
The lubricating oil in the blazer chamber 21 does not flow into the blazer chamber 21.

Note that it is also possible to modify a part of the above embodiment as follows.

(b) As shown in FIG. 6, by changing the blazer passage 22 so that the tappet chamber 17 is interposed between the blazer chamber 21 and the crank chamber 24,
Blow-by gas in a crank chamber 24 flows into a tappet chamber 17 and is once separated into oil, and then flows into a blazer chamber 21 where oil is roughly separated.

B As shown in FIG. 7, the preliminary blazer chamber 20 is sealed with a lid 35, and the blazer passage hole 22 is
1 and the crank chamber 24 is a spare blazer chamber 20.
By changing the dawn so that the blow-by gas in the crank chamber 24 flows into the preliminary blazer chamber 20 and is once separated from the oil, it flows into the blazer chamber 21 and is further finely separated from the oil.

C By combining the above structures A and B, even if one of the tappet chamber 17 and the spare blazer chamber 20 is lowered and soaked in lubricating oil, blow-by gas can flow out to the blazer chamber 21 through the other. Do it like this.

<Effects> In the present invention, in a vertical shaft engine installed in a walk-behind small agricultural management machine with a handle extending diagonally rearward and upward, the Since the blazer chamber is formed near the center in the left and right direction at the rear of the wall, the blazer chamber will be located higher than the lubricating oil level in the engine no matter what tilted position the control machine is in. Therefore, lubricating oil will not leak out from the blazer device. Therefore, no matter what kind of tilted or fallen state the management machine is actually in, the lubricating oil in the crankcase should be completely prevented from flowing into the blazer chamber in a liquid state and blowing out to the outside. I can do it.

Furthermore, since the blazer chamber is formed in the crankcase, it is easy to process and can also be formed to have a large volume.

Furthermore, since the blazer chamber is formed in the crankcase, which is a non-moving member, it can be reliably sealed, and the separated oil will not contaminate the engine wall.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Figure 1 is a side view of a small agricultural walking type management machine, Figure 2 is a front view, and Figure 3 is a front view.
The figure is Fig. 2 - line sectional view, Fig. 4 is Fig. 3 -
5 is a cross-sectional view taken along the line of FIG. 4, FIG. 6 is a vertical cross-sectional view of the FIG. 4 portion of another embodiment, and FIG. 7 is a cross-sectional plan view of the FIG. 4 portion of yet another embodiment. . 1... Vertical shaft engine, 8... Handle, 10...
...Crankcase, 11...Cooling fan, 12...
...bonnet, 21...breather chamber, 22...breather passage, 24...crank chamber, 25...oil separation means.

Claims (1)

[Scope of utility model registration request] A vertical shaft engine 1 is mounted on a small agricultural walking type management machine having a handle 8 extending diagonally upward at the rear, and a cooling fan 11 and a bonnet 12 are arranged on the crankcase 10 of the engine 1. A blazer chamber 21 is formed in the vicinity of the center in the left-right direction at the rear of the upper wall of the crankcase 10 on the rear side of the region, and the blazer chamber 21 is communicated with the crank chamber 24 through a blazer passage 22, and oil is separated in the blazer chamber 21. A blazer device for an engine of a small agricultural walking type management machine, characterized in that means 25 is provided.