JPH0213727Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a heat shield plate for a general-purpose engine.

[Conventional technology]

A conventional example will be explained with reference to FIGS. 4 and 5. In the first conventional example, as shown in FIG. 5, a muffler cover 3 made of sheet metal is provided to isolate heat from the muffler 1 to the fuel tank 2 and to ensure worker safety.
Heat shielding effect is not sufficient.

In the second conventional example shown in FIG. 4, the cylinder cover and muffler cover are integrally formed using a material such as resin to form the engine cover 4, and the muffler gasket 5 is extended to the bottom of the muffler to provide heat insulation. I'm going. However, since the muffler gasket 5 is long, there are drawbacks such as vibration and abnormal noise, and an increase in weight and cost. Furthermore, the fifth
In the figure, 6 is a cylinder and 7 is a crankcase.

[Problem that the invention attempts to solve]

The heat shielding plate between the muffler 1 and the fuel tank 2 that covers the top, bottom, and right sides as shown in Figure 5 has insufficient heat shielding effect; However, there were disadvantages such as vibration vibrations that caused abnormal noise, increased weight, and increased costs.

The purpose of the present invention is to eliminate the drawbacks of the conventional example,
To provide a heat shield mounting structure in which the heat shield is small, weight and cost are reduced, the heat shield does not shake due to vibration, and no mounting screws are required.

[Means for solving problems]

The heat shield mounting structure of the present invention is such that the muffler and the crankcase are provided with uneven portions, and the heat shield plate with holes and protrusions corresponding to the uneven portions is sandwiched between the muffler and the crankcase, and screws The above object can be achieved without using a fastening member such as the above.

[Effect]

The mounting structure of the heat shield plate according to the present invention is that the heat shield plate is in close contact with the crankcase, so that heat is sufficiently isolated from the engine and muffler, and the heat shield plate does not allow fastening parts such as screws. Since it is installed without being used, it is lightweight, reduces costs, and does not generate abnormal noise due to vibration.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Here, the same or equivalent components as those of the conventional device will be described using the same reference numerals.

FIG. 1 is a sectional view of the muffler portion, FIG. 2 is a plan view of the blocking plate seen from the direction of arrow A in FIG. 1, and FIG. 3 is an enlarged view of the lower part of the muffler main body. In the figure, 1 is a muffler, 1a is a protrusion, 1b is a groove, 2 is a fuel tank,
4 is an engine cover, 6 is a cylinder, 7 is a crankcase, and 7a is a concave groove provided in the crankcase 7. Reference numeral 11 denotes a heat shield plate, which has elongated holes 11a that loosely fit into two protrusions 1a formed at the lower end of the muffler body 1, and a convex portion that fits into two recessed grooves 7a formed on the side of the crankcase 7. 11b, and an R portion 11c on the convex side of the elongated hole.
is formed.

Reference numeral 1a denotes a projection having a groove 1b toward the crankcase 7 side, as shown in FIG. 3, into which a heat shield plate 11 can be inserted.

Next, the operation of the above embodiment will be explained.

The convex portion 11b of the heat shield plate 11 is fitted into the concave groove 7a of the crankcase 7, and the protrusion 1a of the muffler body 1 is inserted into the elongated hole 11a of the heat shield plate 11 as shown in FIG. 1a.

Next, move the muffler body 1 toward the crankcase 7 side as shown by arrow C, and place the muffler body 1 in a state where the R part 11c of the elongated hole of the heat shield plate is inserted into the groove 1b of the muffler convex part.
is fixed to the cylinder 6 with a bolt (not shown).

At this time, the dimensions of the heat shield plate 11 are such that when the muffler 1 is attached, it is sandwiched between the crankcase concave groove 7a and the groove 1b formed on the protrusion of the muffler, and is pressed by the side walls of each groove, so that no looseness occurs. There are no reasonable dimensions.

[Effect of idea]

As mentioned above, since the structure is configured, the heat shield can be made smaller, weight and cost are reduced, vibration of the heat shield is eliminated, and there is no need for mounting screws for the heat shield. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the muffler portion, FIG. 2 is a plan view of the heat shield plate, FIG. 3 is an enlarged view of the lower part of the muffler main body, and FIGS. 4 and 5 are views showing a conventional example. 1...Muffler, 7...Crankcase, 11...
…Heat shield plate.

Claims (1)

[Scope of utility model registration request] In a general-purpose engine, a concave groove is provided in the crankcase, a protrusion having a groove facing the crankcase is provided at the lower part of a muffler body disposed close to the crankcase, and a protrusion that fits into the concave groove is provided. A heat shield plate having an elongated hole that loosely fits into the protrusion and forms an edge that fits into the groove is sandwiched between the crankcase concave groove and the groove of the protrusion on the lower part of the muffler body. A heat shield mounting structure characterized by covering the lower part of the muffler with a heat plate.