JPH08100657A - Dustproof device for forcedly-air-cooled engine - Google Patents

Abstract

PURPOSE: To easily detect that a fresh-air intake is blocked by foreign material such as dust and mud by forming the fresh-air intake on a recoil case, covering the recoil case with a ventilating dustproof cover, and housing the recoil handle in the dustproof cover. CONSTITUTION: A fan case 1 is arranged on a front side of an engine main body 7, while an evaporator 8 and an air cleaner 9 are arranged on a lateral side. A recoil case 2 is mounted on a front portion of the fan case 1. The recoil case 2, on which fresh-air intake 3 is formed, is covered with a ventilating dustproof cover 4. In such a dustproof device, a recoil handle 5 is housed in the dustproof cover 4 so as to suppress blockage of the fresh-air intake port 3 by means of foreign material. At the starting time of the engine, the recoil handle 5 is exposed by demounting the dustproof cover 4. This operation makes it easy to find the intake 3 in a blocked state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof device for a forced air-cooled engine, and more particularly to a dustproof device capable of suppressing the outside air intake of a recoil case from being blocked by foreign matter such as dust or mud.

[0002]

2. Description of the Related Art A conventional dustproof device for a forced air cooling engine is shown in FIG. Like the present invention, it has the following basic structure. That is, the recoil case 102 is attached to the front of the fan case 101, the outside air intake 103 is opened in the recoil case 102, and the recoil case 102 has a ventilation dustproof cover 1.
It is covered with 04.

In this prior art, there is no opportunity to remove the dustproof cover 104 except when cleaning the inside of the dustproof cover 104. For example, the recoil handle 105 is the dust cover 1
Since it projects to the outside of 04, the engine starting operation is performed only by pulling the recoil handle 105 without removing the dust cover 104. As described above, in this conventional technique, since there is almost no opportunity to remove the dustproof cover 104, dust, mud, and the like that have passed through the dustproof cover 104 are accumulated and hardened on the outside air intake 103, and the foreign matter closes the outside air intake 103. Dust cover 1
The state cannot be confirmed from the outside of 04, and the operator does not notice this.

[0004]

In the above-mentioned prior art, since there is almost no opportunity to remove the dustproof cover 104, even if the outside air intake port 103 is blocked by a foreign substance, the worker does not notice this. Therefore, the engine is operated without knowing that the outside air intake 103 is blocked by the foreign matter,
The engine may overheat due to insufficient cooling air.

An object of the present invention is to provide a dustproof device for a forced air-cooled engine which can prevent the outside air intake port of the recoil case from being blocked by foreign matter such as dust or mud.

[0006]

[Means for Solving the Problems]

(First Invention) As shown in FIG. 1 or 2, the first invention is such that a recoil case 2 is attached to a front part of a fan case 1, an outside air intake port 3 is opened in the recoil case 2, and the recoil case 2 is provided. A dustproof device for a forced air-cooled engine covered with a dustproof dustproof cover 4 is characterized by the following.

That is, the recoil handle 5 is housed in the dustproof cover 4, and the recoil handle 5 is exposed by removing the dustproof cover 4.

(Second Invention) The second invention is shown in FIG. 1 or FIG.
In the first aspect of the invention, the outside air intake 3 is opened in the peripheral wall of the recoil case 2, the scraper 6 is attached to the inside of the dustproof cover 4, and the tip of the scraper 6 is aligned with the peripheral wall of the recoil case 2. It is characterized in that the foreign matter blocking the outside air intake port 3 is scraped off at the tip of the scraper 6 by the removal operation of the dustproof cover 4.

[0009]

[Action]

(First Invention) Since the dustproof cover 4 needs to be removed in order to operate the recoil handle 5, the dustproof cover 4 is removed each time the engine is started. For this reason, when the outside air intake port 3 is blocked by a foreign substance, the worker easily notices this when starting the engine.

(Second invention) In addition to the operation of the first invention, it operates as follows. That is, when the dust cover 4 is removed to start the engine, the scraper 6 automatically scrapes off the foreign matter blocking the outside air intake 3.

[0011]

【The invention's effect】

(First invention) Since the dustproof cover 4 is regularly removed at the time of engine start, if the outside air intake 3 is blocked by foreign matter, the worker can easily remove it when the engine is started. You will notice and get an opportunity to clean. Therefore, the engine is not operated with the outside air intake port 3 being blocked by the foreign matter, and overheating of the engine due to insufficient cooling air can be suppressed.

(Second invention) In addition to the effects of the first invention, the following effects are exhibited. That is, when the dust-proof cover 4 is removed, the scraper 6 automatically scrapes foreign matter that blocks the outside air intake 3. Therefore, the foreign matter is scraped off periodically when the engine is started, the foreign matter is less likely to be collected in the outside air intake port 3, and the number of times of cleaning the outside air intake port 3 can be reduced.

[0013]

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a first embodiment of the present invention. In this embodiment, a forced air-cooled spark ignition engine is used. The structure of this engine is as follows. That is, the fan case 1 is provided at the front of the engine body 7, the carburetor 8 and the air cleaner 9 are provided at the side, and the fuel tank 10 is provided at the top. Then, a recoil case 2 is attached to the front part of the fan case 1, an outside air intake port 3 is opened in the recoil case 2, and the recoil case 2 is covered with a ventilation dustproof cover 4.

In this embodiment, in order to prevent the outside air intake 3 of the recoil case 2 from being blocked by foreign matter, the recoil handle 5 is housed in a dust cover 4, and the dust cover 4 is removed to remove the recoil handle 5. Is exposed.

According to this structure, the dust cover 4 needs to be removed in order to operate the recoil handle 5. Therefore, the dust cover 4 is required each time the engine is started.
Will be removed. For this reason, when the outside air intake port 3 is blocked by a foreign substance, the worker easily notices this when starting the engine.

The dustproof cover 4 is formed of a net material. The dust cover 4 is attached to the fan case 1 so as to be openable and closable by a hinge 11 on the side. The dust-proof cover 4 is kept closed by the lock claws 12 on the side.

Further, in this embodiment, the outside air intake port 3
On the peripheral wall of the recoil case 2, attach the scraper 6 inside the dust cover 4, align the tip of this scraper 6 with the peripheral wall of the recoil case 2, and remove the dust cover 4 to remove the outside air intake port. The foreign matter blocking 3 is scraped off.

According to this structure, when the dustproof cover 4 is removed to start the engine, the scraper 6 automatically scrapes off the foreign matter blocking the outside air intake 3.

The outside air intake 3 is formed over the entire circumference of the peripheral wall of the recoil case 2. Scraper 6
The dust cover 4 is provided above and below the inside of the dust cover 4.
When opened, the tip of scraper 6 will be recoil case 2.
It is designed to rub against the surrounding walls.

FIG. 2 is a diagram for explaining the second embodiment of the present invention. The second embodiment is constructed by additionally providing a non-ventilating wind shield cover 13 to the engine of the first embodiment. The wind shield cover 13 is formed in a shape that covers the upper half of the dustproof cover 4, and is attached to the fan case 1 by a hinge 14 on the upper side so as to be openable and closable. When opening the dustproof cover 4, the wind shield cover 13 is opened in advance. All other structures are the same as those in the first embodiment, and in the figure, the same elements as those in the first embodiment are designated by the same reference numerals.

According to this structure, the outside air introduced into the upper outside air intake port 3 bypasses the inside of the wind shield cover 13 as shown by the arrow 15, and the flow velocity decreases, so that the outside air is the upper outside air. By the time the air reaches the intake port 3, the dust contained in the outside air easily falls due to its own weight, and the amount of dust reaching the upper outside air intake port 3 can be reduced. On the other hand, as the outside air is less likely to be introduced into the upper outside air intake 3, the lower outside air intake 3 has an arrow 16
Although it is easy to introduce the upward outside air indicated by, the lower outside air intake port 3 is downward, and since dust is originally hard to accumulate, there is no problem.

The contents of the respective embodiments of the present invention are as described above, but the present invention is not limited to the contents of the respective embodiments. For example, the engine type is not limited to the spark ignition type engine, but may be a diesel engine. Further, the material of the dustproof cover 4 is not limited to the net material, and may be punching metal or the like. Further, the opening / closing structure of the dustproof cover 4 may be a structure for inserting / removing into / from the recoil case 2, instead of the hinge 11.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a first embodiment of the present invention, and FIG.
(A) is a front view of the engine, FIG. 1 (B) is a side view of the main part,
FIG. 1C is a plan view of an essential part.

2 is a diagram for explaining a second embodiment of the present invention, and FIG.
FIG. 2A is a front view of the engine, and FIG. 2B is a partially longitudinal side view of a main part.

3A and 3B are views for explaining a conventional technique, FIG. 3A is a front view of an engine, and FIG. 3B is a side view of a main part.

[Explanation of symbols]

1 ... Fan case, 2 ... Recoil case, 3 ... Outside air intake port, 4 ... Dust cover, 5 ... Recoil handle, 6 ...
Scraper.

Claims (2)

[Claims] 1. A recoil case (2) is attached to the front part of a fan case (1), an outside air intake (3) is opened in this recoil case (2), and this recoil case (2) has a ventilation dustproof cover. In the dustproof device for the forced air-cooled engine covered with (4), the recoil handle (5) is housed in the dustproof cover (4), and the recoil handle (5) is exposed by removing the dustproof cover (4). A dustproof device for a forced air-cooled engine, which is characterized by: 2. The dustproof device for a forced air-cooled engine according to claim 1, wherein the outside air intake (3) is opened in the peripheral wall of the recoil case (2), and the scraper (6) is attached inside the dustproof cover (4). Align the tip of the scraper (6) with the peripheral wall of the recoil case (2), and remove the dust cover (4) to remove foreign substances that block the outside air intake (3) at the tip of the scraper (6). A dustproof device for a forced air-cooled engine characterized by being scraped off.