JPS6018580Y2 - Dust control equipment for air-cooled internal combustion engines - Google Patents

Description

[Detailed description of the invention] The present invention prevents dust from entering the inside of an air-cooled internal combustion engine through the cooling intake port of the air guide cover, and prevents dust from accumulating on the cooling intake port and preventing intake air. This relates to a dustproof device for preventing dust from getting in the way.

In general, power agricultural machinery such as combine harvesters and harvesters often generate dust such as straw waste, so conventionally, the engines installed in them have been taken to prevent dust by covering the vicinity of the cooling intake port or the entire engine with wire mesh, perforated plates, etc. is being carried out.

However, with these devices, especially when there is a lot of coarse dust, dust adheres to the eyes of the wire mesh or perforated plate in a very short time, causing clogging, which frequently causes engine overheating accidents. It is the cause.

In order to prevent overheating accidents caused by the above-mentioned causes, the reality is that there is no appropriate means other than frequently removing the dust that adheres to the perforated plate and the like.

In view of the above-mentioned circumstances, the present invention was devised in order to eliminate the inconveniences of the conventional technology. A disk-shaped dustproof plate is integrally attached, which has a diameter larger than the cooling intake port and is inclined toward the intake port as viewed from the center outward from the center, and a plurality of intake windows are provided on this dustproof plate. In addition to being formed radially, a scraper cutter that is successively overlapped with the intake window is provided near the periphery of the dustproof plate on the starter mounting member disposed on the front surface of the dustproof plate. A rotating dust-proof plate blocks the dust that is about to be sucked in by the intake air flow to achieve complete dust-proofing, and a scraper cutter is used to remove coarse dust that has wrapped around and adhered to the intake window partition of the dust-proof plate. Even in environments where large amounts of coarse dust are present, the cooling air intake can be prevented from becoming dusty, ensuring the desired amount of cooling air at all times, and preventing engine overheating. The present invention aims to provide a dust prevention device for an air-cooled internal combustion engine that can prevent accidents.

The structure of the present invention will be described with reference to an embodiment shown in the drawings. 1 is an air-cooled internal combustion engine, 2 is a crankcase thereof, 3 is an air-cooled internal combustion engine;
is an air guide cover, and a cooling intake port 4 is formed on one surface of the air guide cover 3.

5 is a flywheel of the engine, and this flywheel 5 faces inside the cooling intake port 4 and blocks the cooling intake port 4.

Reference numeral 6 denotes a dustproof plate located outside the cooling intake port 4, and the dustproof plate 6 has a larger diameter than the cooling intake port 4, and extends toward the intake port 4 side as it goes outward from the center in side view. It is formed into an inclined disk shape, and its boss portion is integrally attached to the boss portion of the flywheel 5 with bolts 7, and the cooling intake port 4 is covered by the dustproof plate 6.

A plurality of intake windows 8 are formed radially on the dustproof plate 6.

Reference numeral 9 denotes a recoil starter, which is maintained at a predetermined distance H via a mounting member 10 and is fixedly supported on the wind guide cover 3 by bolts 10'.

Reference numeral 11 denotes a scraper cutter, and this scraper cutter 11 is fixed to the mounting member 10 so as to be disposed close to the front surface of the peripheral edge of the dustproof plate 6 with a small gap H' maintained therebetween. As the plate 6 rotates, it sequentially overlaps with the intake window 8.

In addition, a plurality of dust dissipating protrusions 12 are integrally formed on the outer periphery of the dustproof plate 6, so that the cooling inlet 4 can be connected from the outer circumferential direction of the dustproof plate 6.
It is also possible to dissipate the dust that enters.

In the configuration as described above, while the engine is operating, outside air is sucked in through the cooling intake port 4 of the air guide cover 3, and the engine is air-cooled, but dust is also carried by the intake air flow to the cooling intake port 4. It is attracted toward the target.

However, in front of the cooling intake port 4, there is a disk-shaped dustproof plate 6 formed with a diameter larger than that of the cooling intake port 4, and since this dustproof plate 6 rotates at high speed together with the flywheel 5, Dust attempting to enter the cooling air intake port 4 is blocked by the dustproof plate 6 and most of it is discharged in the centrifugal direction of the dustproof plate 6.

In addition, the coarse dust that has been wrapped around the air intake window 8 of the dust-proof plate 6 around the partition part is guided toward the outer periphery of the dust-proof plate 6 along the inclined surface as the dust-proof plate 60 rotates, and is placed close to the front surface of the periphery. It is cut by the scraper cutter 11 which is provided with the dust-proof plate 6, and discharged in the centrifugal direction by the rotation of the dust-proof plate 6.

In addition, in the case where the dust-dissipating protrusions 12 are provided on the outer periphery of the dust-proof plate 6, dust that is about to be sucked into the cooling intake port 4 from the outer circumferential direction of the dust-proof plate 6 is also dissipated by the protrusions 12, so It can be completely dust-proof.

. In short, the present invention provides a flywheel 5 of the engine 1 provided inside the cooling intake port 4 of the air guide cover 3, so that the cooling intake port 4 faces the flywheel 5 and has a larger diameter than the cooling intake port 4. A disk-shaped dustproof plate 6 is integrally attached, which is inclined toward the air intake port 4 side as viewed from the center toward the outside.
This dustproof plate 6 has a plurality of intake windows 8 formed in a radial pattern, and a scraper cutter 11 that sequentially overlaps the intake windows 8 is disposed near the periphery of the dustproof plate 6 on the front surface of the dustproof plate 6. Since it is installed on the starter mounting member, the rotating dustproof plate blocks the dust that tries to be sucked in by the intake air flow into the cooling intake port of the air guide cover, achieving complete dustproofing. The coarse dust that has wrapped around and adhered to the intake window partition of the dustproof plate can be actively guided toward the outer circumference of the dustproof plate and removed by cutting with a scraper cutter. This prevents the cooling intake from becoming dusty, ensures the desired amount of cooling intake at all times, and has an extremely useful practical effect of preventing engine overheating accidents. .

[Brief explanation of the drawing]

The drawings show an embodiment of the dust prevention device for an air-cooled internal combustion engine according to the present invention, in which FIG. 1 is an overall side view with a part cut away, FIG. Figure 3 is a front view of the main parts. In the figure, 2 is a crankcase, 3 is a wind guide cover, 4 is a cooling intake port, 5 is an engine flywheel, 6 is a dustproof plate,
8 is its intake window, 9 is a recoil starter, 11 is a scraper cutter, and 12 is a dust dissipation projection.

Claims (1)

[Scope of utility model registration request] The flywheel 5 of the engine 1 provided inside the cooling intake port 4 of the air guide cover 3 is provided with a flywheel 5 that faces the cooling intake port 4, has a larger diameter than the cooling intake port 4, and is located outward from the center in side view. A disk-shaped dustproof plate 6 is integrally attached, which is inclined toward the intake port 4 side as it goes towards the side, and a plurality of intake windows 8 are formed radially in this dustproof plate 6, and a plurality of intake windows 8 are formed near the periphery of the dustproof plate 6. This is a dust prevention device for an air-cooled internal combustion engine, characterized in that a scraper cutter 11 that sequentially overlaps the intake window 8 is provided on a starter mounting member 10 disposed on the front surface of a dust prevention plate 6.