JP2547587Y2 - Insulation device for muffler of small engine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating device for a muffler of a small engine in which a heat insulating cover is effectively attached to an outer peripheral side of a muffler.

[0002]

2. Description of the Related Art Conventionally, in a small engine in which a cover is attached to a muffler which is connected to and connected to a cylinder,
It is known to attach a heat insulating cover from the inside to the bottom of the muffler, as seen in Japanese Utility Model Publication No. 2-13727.

[0003]

[Problems to be Solved by the Invention] However, since the engine cover or the muffler cover is attached to the outside of the muffler without attaching the heat insulating cover, the engine cover and the like are actually made of synthetic resin. When using a catalyst for exhaust gas, the gap between the muffler and the cover must be increased to prevent burning or deformation due to heat, and the outer dimensions of the engine cover or muffler cover increase, and the entire engine Becomes larger,
The heat-insulating cover has a problem that it inevitably vibrates or requires a mounting means, which results in a complicated mounting structure.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised so as to solve such a problem and to effectively attach a heat insulating cover. Therefore, the muffler communicating with the cylinder is covered with the cover. In a small engine configured to be attached to the muffler, a muffler mounting bolt that penetrates at least an inner surface, a lower surface, and an outer surface of the muffler and has a substantially U-shape in a side view from the outer surface to the inner surface of the muffler. A gasket is attached and configured to be able to be fastened together.

[0005]

Therefore, when the heat-insulating cover is fitted from below the muffler, and the heat-insulating cover is made into a gasket and fastened together by mounting bolts, the heat-insulating cover approaches at least the inner, lower, and outer surfaces of the muffler, so that the outer peripheral side is attained. Insulation can be effectively and easily attached to the engine, and the engine cover or muffler cover can be moved closer to the outside of the heat-insulating cover.
The outer diameter of the muffler can be effectively reduced by reducing its outer dimensions so as not to increase its size.

[0006]

FIG. 1 is a rear view showing, in section, a part of a small engine integrally provided at the rear part of the body of a brush cutter, in which a fuel tank 4 is provided below and a spark plug 5 and a piston 6 are mounted. A carburetor 8 is connected to an intake port 7 of the equipped cylinder 1 so as to communicate therewith. An outer side of an exhaust port 9 of the cylinder 1 is provided with an inner surface having an inlet 10, a tail pipe 11, and a step 12 at the middle in the vertical direction. Outer surface, both bolt holes 1
The muffler A having the mufflers 3 and 13 is fixed by the two bolts 3 and the engine cover 2 or the muffler cover is attached to the lower side of the muffler A from the upper side to the outer side through the outer side.

[0007] Reference numeral B denotes a heat insulating cover, which approaches the inner side, lower side and outer side of the muffler A, and the step 12
1 and 4, it is formed in a substantially U-shape as viewed from the side so as to have a stepped portion 14 which can be engaged with the inner surface of the heat insulating cover B serving as a muffler gasket. In addition to forming an inlet portion 15 and both holes 16, 16 corresponding to the bolt holes 13, 13, both holes 17 corresponding to the bolt holes 13, 13 are provided above the step portion 14 on the outer surface.
17 is formed, but it is also possible to extend and extend the upper part of the inner surface and the upper part of the outer surface of the heat insulating cover B until they overlap.

Therefore, the heat insulating cover B is fitted from below the muffler A, and the heat insulating cover B is used as a gasket, so that the two mounting bolts 3 are inserted through the holes 17, the bolt holes 13, and the holes 16, and are also inserted into the cylinder 1. When they are attached and fastened together, as shown in FIG. 1, the heat insulating cover B approaches at least the inner side surface, the lower surface, and the outer side surface of the muffler A so that the heat insulating effect can be effectively and easily attached to the outer peripheral side with the heat insulating effect. In addition, the engine cover 2 or the muffler cover is brought close to the outside of the heat insulating cover as shown in FIG. The fuel tank 4 can be attached effectively, or the upper part of the fuel tank 4 can be brought close to the fuel tank 4 for effective assembly.

[0009]

[Effect of the Invention] As described above, the present invention provides a heat insulating cover (B).
Is fitted from below the muffler (A), and the heat insulating cover (B) is made into a gasket and fastened together with the mounting bolts (3), so that the heat insulating cover (B) at least has an inner surface, a lower surface, and an outer surface of the muffler (A). The heat insulating cover (B) can be effectively and easily attached to the outer peripheral side by approaching to the outer peripheral side, and the heat insulating cover (B) is attached as a muffler gasket. The clearance between the muffler (A) and the muffler (A) can be reduced, so that the outer dimensions of the engine cover (2) or the muffler cover can be reduced. And the gap with the muffler (A) can be reduced, so that the outer dimensions can be prevented from increasing. It has the advantage that can be suitably carried out in the bets structure.

[Brief description of the drawings]

FIG. 1 is a rear view showing an engine part of a brush cutter in a partially sectional view.

FIG. 2 is a side view showing a right side of a part of FIG. 1;

FIG. 3 is a side view showing a left side surface of a part of FIG. 1;

FIG. 4 is an exploded side view showing a part of FIG. 1;

FIG. 5 is an exploded side view showing a part of FIG. 2;

FIG. 6 is an exploded side view showing a part of FIG. 3;

[Explanation of symbols]

 1 Cylinder A Muffler 2 Cover B Insulation cover 3 Mounting bolt

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 59-111912 (JP, U) JP 1-95526 (JP, U) JP-A 57-59922 (JP, U) JP 4- 119322 (JP, U) Japanese Utility Model Showa 59-28621 (JP, U) Japanese Utility Model 2-50,32 (JP, U) Japanese Utility Model Utility Model 62-176445 (JP, U) Japanese Utility Model Utility Model 5-7924 (JP, U) Hikaru Hei 2-147821 (JP, U) Hiko Hei 2-13727 (JP, Y2)

Claims (1)

(57) [Scope of request for utility model registration] 1. A small engine in which a cover (2) is attached to a muffler (A) communicating with and connected to a cylinder (1), wherein at least an inner surface, a lower surface, and an outer surface of the muffler (A) are provided. An approaching U-shaped heat-insulating cover (B) that is approaching in a side view is mounted so as to be jointly fastened as a muffler gasket by a mounting bolt (3) of the muffler (A) penetrating from the outer surface to the inner surface of the muffler (A). A heat insulation device for a muffler.