JPH0115858Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a muffler cover for a small portable engine such as a brush cutter, in which a plurality of types of mufflers having exhaust holes in different directions are selectively mounted.

Conventionally, the muffler of this type of engine has a muffler cover that covers the muffler to prevent workers' hands from touching it and getting burnt, and an opening is provided through the muffler cover at a position facing the exhaust hole of the muffler. was set up. In this type of small engine, it is necessary to avoid blowing exhaust gas from the exhaust hole onto the operator, but for example, if the same type of engine is used upside down due to the design, Since the direction was opposite, it had to be changed, and the muffler cover was also designed and manufactured separately.

The present invention provides an opening in the muffler cover at a position facing each exhaust hole of a plurality of mufflers with exhaust holes in different directions, which are expected to be installed.
A protective body covering this opening is formed integrally with the muffler cover from synthetic resin, and a notch is provided on the outer periphery of the protective body to facilitate punching out of the protective body, so that the muffler can be selectively installed. By punching out the protective body of the opening of the muffler cover facing the exhaust hole, it is possible to use one type of muffler cover in common with multiple types of mufflers with different exhaust hole directions. The aim is to reduce production costs by reducing mold production costs and reducing the types and quantities of muffler covers in stock.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is the cylinder of engine 3,
A piston 5 is slidably fitted inside. 7
1 is a connecting rod that connects the crank arm 9 and the piston 5, and 11 is a spark plug. 13 is cylinder 1
The exhaust port 15 is a muffler connected and fixed to the exhaust port 13 by a screw 17.
The exhaust gas discharged from the exhaust gas is muffled and discharged from the exhaust hole 19. 21 is a cylinder cover fixed to the cylinder 1 with screws 23, 25 is a muffler cover that covers the muffler 15, and the upper end is attached with screws 27.
The lower end is fixed to the cylinder cover 21 by screws 29, and the lower end is fixed to the crankcase 31 of the engine 3 by screws 29. 33 is muffler cover 2
The exhaust hole 1 of the muffler 15 is an opening that opens on the side surface of the muffler 15 and is selectively installed among a plurality of types of mufflers.
As shown in FIGS. 6 and 7, the muffler 15 is covered with fence-like protectors 35 and 35 to prevent the operator's fingers from touching the muffler 15 during molding. It used to be.
That is, the protector 35 was formed with a groove-shaped notch 37 on the outer periphery to facilitate punching out of the protector 35, and was punched out at the notch 37 position. It has been removed as shown in the figure. Reference numeral 39 denotes an opening opening on the front side of the muffler cover 25, which is provided at a position facing the expected exhaust hole of the other muffler 15, and protectors 41, 41 formed integrally with the muffler cover 25 during molding. covered by. A notch 43 is formed on the outer periphery of the shielding body 41 to facilitate punching out of the shielding body 41, and the notch 43 is formed as needed.
It is removed by punching out at position 3.

In the embodiments described above, exhaust gas from the engine 3 enters the muffler 15 through the exhaust port 13, is muffled internally, and is discharged to the atmosphere from the exhaust port 19 through the opening 33.

When using a muffler with an exhaust hole facing the opening 39, the protectors 41, 41 should be removed by punching out the notches 43, 43, and the protectors 35, 35 of the opening 33 should be removed. It is used without any restrictions.

Since the present invention has the configuration as described in the claims, one type of muffler cover can be used for multiple types of mufflers with different exhaust hole directions, reducing the manufacturing cost of muffler cover molds, We are planning to reduce the types and quantities of muffler covers in stock.
This allows production costs to be reduced.

Note that the protector of the present invention is not limited to a fence-like structure as in the above-mentioned embodiments, but may be formed in a plate-shape. Furthermore, the notch is not limited to a groove-like one, and if the entire protector is formed to be thinner than the thickness of the muffler cover as in the example, the entire protector may have a stepped portion at the outer peripheral end. As the notch to be formed, it is not necessary to form a separate notch groove in the outer peripheral portion.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of one embodiment of the present invention;
Figure 3 is a front view, side view, and side view of the same main parts, respectively.
4 is a plan sectional view taken along the - line in FIGS. 2 and 3, FIG. 5 is a perspective explanatory view of the main parts, and FIGS. 6 and 7 are plan sectional views of the same main parts before punching, respectively. It is a perspective explanatory view. Explanation of the symbols representing the main parts of the drawing, 3...
Engine, 15...muffler, 19...exhaust hole,
25... Muffler cover, 33, 39... Opening, 35, 41... Protective body, 37, 43... Notch.

Claims (1)

[Scope of utility model registration request] In an engine in which a plurality of types of mufflers 15 having exhaust holes 19 in different directions are selectively installed, a synthetic resin muffler cover 25 covering the muffler 15 has exhaust holes 19 for each of the plurality of types of mufflers 15. Openings 3 are located in positions facing each other.
3, 39, and protectors 35, 41 that cover the openings 33, 39 are formed integrally with the muffler cover 25, and the protectors 35, 41 are formed on the outer periphery of the protectors 35, 41. Notches 37 and 43 are provided to facilitate punching, and the opening 33 is formed by punching out the protective body 35 at a position facing the exhaust hole 19 of the selectively mounted muffler 15. A muffler cover featuring