JPS6023456Y2 - Installation device for deflector plates in air-cooled engines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for a baffle plate in another air-cooled general-purpose engine.

Conventionally, in this type of engine, cooling fins and a fan cover are provided on the front surface of the cylinder, and a deflector plate extending from one side of the fan cover to the back surface of the cylinder is provided on the outside of the cooling fan on the outer periphery of one side of the cylinder. A type of deflection plate that guides cold air to the back of the cylinder is known, but in this case, the deflection plate is generally attached to a plurality of bosses protruding between the cooling fins in the middle part. This is accompanied by the disadvantage that the flow of cold air is obstructed by the boss portion, and the cooling effect on the back surface of the cylinder is reduced.

The purpose of the present invention is to provide a mounting device that eliminates such inconveniences, and includes a fan cover 4 for a cooling fan 3 provided on the front surface of a cylinder 2 of an engine 1, and a fan cover 4 for a cooling fan 3 mounted on the front surface of a cylinder 2 of an engine 1. In a device in which a deflecting plate 6 is provided that extends to the back surface of the cylinder 2 to cover the cooling fan 5 on the outer periphery of one side of the cylinder 2, one end of the deflecting plate 6 is connected to a muffler mounting boss portion 8 that protrudes from the back surface of the cylinder 2. muffler 7
The fan cover 4 is fastened integrally with the fan cover 4, and the other end of the deflecting plate 6 is locked to a locking portion 9 protruding from one side 4a of the fan cover 4.

For example, as shown in the second figure, the fan cover 4 is provided to surround the cooling fan 3 disposed on the front surface of the crankcase 10 of the engine 1 and cover the front surface of the crankcase 10 and the cylinder 2 above it. The rotation of the fan 3 acts to guide the cool air sucked through the front air intake port upward and blow it toward the cylinder 2 side.

The cylinder 2 has a cooling fan 5 on the outer periphery of one side and an intake/exhaust port 1 of a side valve type intake/exhaust valve on the other side, as shown in the third figure, for example.
1.12, so there is an exhaust port 1 on the back side of the other side.
A mounting boss part 8 of a muffler 7 connected to the baffle plate 2 is provided in a protruding manner, and one end of the baffle plate 6 and the muffler 7 are fastened together with bolts 13 to this part.

The locking claws 9 are formed by cutting and raising small pieces inward on one side 4a of the fan cover 4 to form a pair of upper and lower parts, into which the V-shaped locking end of the other end of the deflector plate 6 is inserted. It was supposed to be locked.

In the drawing, 14 is the cylinder head at the top of cylinder 2, and 15 is the cylinder head at the top of cylinder 2.
indicates a fuel tank placed above the cylinder head 14.

Next, to explain its operation, the cold air blown toward the cylinder 2 by the cooling fan 3 as described above flows to both sides of the cylinder 2 and above the cylinder head, and flows to the intake and exhaust ports 11 and 12 side of the cylinder 2. The cold air flowing through muffler 7
The cooling air flowing to the back side of the cylinder head 14 and above the cylinder head 14 is discharged to the outside through the upper side of the muffler 7, and the cold air flowing to the cooling fan 5 side of the cylinder 2 is guided by the baffle plate 6 to the lower side and the back side of the muffler 7. is discharged to the outside through the

If the mounting boss a of the baffle plate 6 is formed in the middle of the cooling fan 5 as shown in the point source diagram in FIG. According to the present invention, since there is no obstacle between the cooling fans 5, cool air can be smoothly guided to the back side of the cylinder 2.

According to the present invention, the deflector plate 6 extends from one side 4a of the fan cover 4 on the front surface of the cylinder 2 to the rear surface of the cylinder 2, covering the cooling fan 5 on the outer periphery of one side of the cylinder 2. The muffler 7 is integrally fastened to the muffler mounting boss 8 protruding from the back of the cylinder, and the other end is locked to the locking pawl 9 protruding from one side 4a of the fan cover 4, so that the baffle plate 6 Since the cylinder 2 is attached to both ends of the muffler, it is possible to smoothly guide cold air and to make the installation strong. It has the advantage of being simple because it is done in a single stop.

[Brief explanation of the drawing]

FIG. 1 is a rear view of an example of an engine equipped with the device of the present invention;
FIG. 2 is a side view thereof, and FIG. 3 is a plan view taken along the line mm in FIG. 2. 1...Engine, 2...Cylinder, 3...
...Cooling fan, 4...Fan cover, 4a.
・・・・・・－Side part, 5... Cooling fan, 6...
... Deflection plate, 7 ... Muffler, 8 ... Muffler mounting boss part, 9 ... Locking claw.

Claims (1)

[Scope of utility model registration request] A fan cover 4 is provided for the cooling fan 3 on the front surface of the cylinder 2 of the engine 1, and a deflector plate 6 extends from one side 4a of the fan cover 4 to the rear surface of the cylinder 2, covering the cooling fan 5 on the outer periphery of one side of the cylinder 2. In the case where the baffle plate 6 is provided, one end of the baffle plate 6 is integrally fastened together with the muffler 7 to a muffler mounting boss portion 8 protruding from the back surface of the cylinder 2, and the other end of the baffle plate 6 is fastened to one side of the fan cover 4. A mounting device for a deflector plate in an air-cooled engine, characterized in that the deflector plate is locked by a locking pawl 9 protruding from a portion 4a.