JPH0426664Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fuel tank mounting structure for a forced air-cooled internal combustion engine.

[Conventional technology]

Conventionally, this type of fuel tank mounting structure is disclosed in Japanese Utility Model Application Publication No. 59-88230, in which hooking protrusions on both sides of the fuel tank are attached to a pair of vertically facing pedestal brackets via vibration isolating material. The structure is such that the fuel tank can be held from both sides by fitting into each part.

[Problem that the invention attempts to solve]

In such a structure, since a pair of pedestal brackets are installed vertically, the width of the fuel tank is restricted and the fuel tank becomes small, or
In order to widen the space between the pair of pedestal brackets, the mounting structure for both pedestal brackets must be made more complex and larger.Also, since vibration isolating material is interposed on each of the pedestal brackets, the number of parts increases and the mounting However, there are many problems that make it no longer easy.

The present invention solves these problems by attaching a fan cover to the side of the crankcase and connecting the fan cover to the side, and also attaching the fuel tank along the lower periphery of the crankcase and fan cover. In a forced air-cooled internal combustion engine that is configured by connecting two fuel tanks in series, the fuel tank can be installed in an optimal structure with sufficient width, and the bracket can be installed on only one side, resulting in a simple structure with fewer parts. Moreover, it is possible to assemble it very easily and to be able to perform it suitably.

[Means for solving problems]

Therefore, in the present invention, an appropriate number of protrusions are provided on the upper surface side of the fuel tank that can be inserted into the abutment area between the crankcase and the fan cover, and the protrusions are provided on the inner edge of the fan cover. On the other side of the crankcase opposite to the fan cover, the upper part of the bracket, which is bent outward and hangs downward, is fixed with a bolt, and the upper part of the bracket is fixed with a bolt. A protrusion protruding from the side of the fuel tank is fitted and locked into the engagement hole formed at the lower part through a vibration isolator.

[Effect]

Therefore, the upper protrusion of the fuel tank is clamped between the abutment between the crankcase and the fan cover, and the side protrusion of the fuel tank is fitted into the engagement hole of the bracket with a vibration isolator interposed therebetween. By fixing the upper part of the bracket to the side of the crankcase with bolts, assembly is easy.

〔Example〕

Next, the embodiment shown in the drawings will be described.

Figure 1 shows a front view of the entire forced air-cooled internal combustion engine. A crankshaft 7 is mounted inside the crankcase A, which is formed by joining the two cases a1 and a2 and threading each bolt 3. A fan cover B is attached to the outer edge of one case a1 having an inlet 8.
The inner lines of the fan wheels 10 are fitted and fixed to the inner end of the crankshaft 7, and the fan wheels 10 installed inside the fan cover B are fitted and fixed to the inner end of the crankshaft 7. A recoil starter 11 is arranged in series, and an ignition plug part 12, an air supply device 13, and a muffling device 14 are respectively provided on the outside, and the structure is similar to the conventional structure.

C is a fuel tank made of synthetic resin, the upper surface of which is formed in a curved shape along the lower circumferential sides of the crankcase A and fan cover B, and the width of which is equal to the width of the crankcase A and fan cover B (the crankshaft). The fuel filler cap 15 is formed to have a wide width that is approximately the same as the core direction (length in the core direction), and a fuel filler cap 15 is fitted into the filler port at one end.

In addition, the crank case A and the fan cover B
Projecting pieces 1 and 1 are respectively provided at two locations on both sides of the upper surface of the fuel tank C below the abutment area.
One side of both protrusions 1 is formed flat so that the outer edge of the case a1 abuts against the other side, and a cutout groove 16 is formed on the other side into which the inner edge of the fan cover B can fit. A wide protrusion 5 is integrally provided on the outer surface of the side of the fuel tank C on the side away from the side 1.

2 is a bracket that is bent outward and installed vertically and has reinforcing ribs 17, 17 at the intermediate bent portion;
At the bottom of the bracket 2, the protrusion 5 is connected to a vibration isolator 6.
The upper part of the bracket 2 is fitted to the tip of the bolt 3 protruding from the outer surface of the case a2, and the nut 18 is screwed and fixed. Install and configure it so that it can be used.

Therefore, with the fan cover B abutting and connected to the crankcase A, both protrusions 1 are inserted between them, and the outer edge of the fan cover B is inserted into the notch groove 16 as shown in FIG. After fitting, the fan cover B is connected and fixed with each screw 9, and the engagement hole 4 of the bracket 2 is fitted to the protrusion 5 with the vibration isolator 6 interposed, and the upper part of the bracket 2 is connected to the upper bolt 3. The fuel tank C can be assembled by fitting the tip and screwing and tightening the nut 18.

Note that even if the above assembly order is reversed, the assembly can be performed in the same manner.

[Effect of idea]

In this way, in the present invention, only one side of the fuel tank C is supported by the bracket 2, so the support member on the other side is not exposed and a compact structure can be achieved, so that the fuel tank C is limited. This means that it is possible to create a tank structure with sufficient width without causing any problems, and in addition, it is possible to support the protrusion 1 on the top surface side and the protrusion 5 on the side, resulting in a robust assembly structure. 1 and fitting the protrusion 5 into the bracket 2, the fuel tank C can be assembled very easily.
It has the advantage of having a simple structure with a small number of parts and can be suitably implemented.

[Brief description of the drawings]

Fig. 1 is a front view of a forced air-cooled internal combustion engine that is an embodiment of the present invention, Fig. 2 is a rear view of the lower part of Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a A partial sectional view taken along the - line in FIG. 1 is shown. A...Crankcase, B...Fan cover,
C...Fuel tank, 1...Protrusion, 2...Bracket, 3...Bolt, 4...Engagement hole, 5...Protrusion,
6... Vibration isolator, 16... Notch groove.

Claims (1)

[Scope of utility model registration request] A fan cover B is connected to the side of the crankcase A, and the fan cover B is connected to the side of the crankcase A.
In a forced air-cooled internal combustion engine configured by connecting a fuel tank C along the lower peripheral side of a fan cover B, an appropriate number of fuel tanks that can be inserted into the abutment area between the crankcase A and the fan cover B. A protruding piece 1 is provided to protrude from the upper surface side of the fuel tank C, and a cutout groove 16 that can be fitted into the inner edge of the fan cover B is formed in the protruding piece 1. On the other side of the crankcase A, the upper part of a bracket 2 that is bent outward and hangs is fixed with bolts 3, and the engagement hole 4 formed in the lower part of the bracket 2 is provided with a fuel tank C. A fuel tank mounting structure characterized in that a protrusion 5 protruding from the side is fitted and locked via a vibration isolator 6.