JPH04119322U - Engine muffler gasket mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the installation and removal of a cover that covers a cylinder and a muffler, and to improve durability by preventing the muffler gasket and its surrounding members from repeatedly colliding with each other due to vibration. [Structure] In an engine in which a muffler 2 is disposed adjacent to a cylinder 1 and a cover 12 is provided to cover the cylinder 1 and muffler 2, the cylinder 1 and the muffler 2 are
A muffler gasket 13 is provided, which has a first heat shielding part 7 that partitions the muffler 2 and a second heat shielding part 8 that is bent at a substantially right angle to the first heat shielding part 7 and covers the lower side of the muffler 2. . A gasket coupling part 14 is provided in the second heat shield part 8, and a muffler coupling part 16 is provided in the lower part of the muffler. The portion 16 is connected by a connecting member 17.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is mainly related to the muffler gasket mounting structure for engines that are used hand-held. do.

0002

[Conventional technology]

Conventionally, the structures of small general-purpose engines used in brush cutters etc. are shown in Figure 3 and The one shown in FIG. 4 is common. First, muffler 2 is installed adjacent to the side of cylinder 1. A cover 3 is provided to cover these cylinders 1 and muffler 2. There is. Furthermore, a fuel tank 4 is disposed below the cylinder 1 and the muffler 2. has been done. Note that the cylinder 1 and the muffler 2 are formed on the cylinder 1. The muffler 2 is connected through an exhaust port 5, and an exhaust port 6 is formed in the muffler 2. It is.

0003 Next, a first heat shielding part 7 that partitions between the cylinder 1 and the muffler 2 and this third The muffler 2 and the fuel tank are bent at a substantially right angle to the heat shielding part 7. A muffler gasket 9 having a second heat shielding part 8 that partitions between the , the first heat shielding part 7 is held between the cylinder 1 and the muffler 2. Further, a protrusion 10 is formed on the tip side of the second heat shielding part 8, and this protrusion 10 is inserted into an elongated hole 11 formed in the cover 3 and held therein.

0004

[Problem that the idea aims to solve]

When installing or removing the cover 3, bend the muffler gasket 9. The protrusion 10 can be inserted into or removed from the elongated hole 11 by Therefore, it takes time and effort to attach and remove the cover 3.

[0005] Also, the second heat shield part 8 of the muffler gasket 9 is inherently vibrated during engine operation. As the protrusion 10 repeatedly hits the edge of the elongated hole 11 as it moves, the muffler gas The disadvantage is that the durability of the jacket 9 and the cover 3 decreases and they become more easily damaged. be.

[0006]

[Means to solve the problem]

A muffler is arranged adjacent to the cylinder, and these cylinders and mufflers In an engine equipped with a cover that covers the cylinder, there is a A first heat shielding part to be cut and a first heat shielding part bent at a substantially right angle to the first heat shielding part and the muff a muffler gasket having a second heat shield portion covering the lower side of the A gasket joint is provided at the lower part of the muffler, and a muffler joint is provided at the lower part of the muffler. The first heat shield part is sandwiched between the cylinder and the muffler, and the first heat shield part is held between the cylinder and the muffler. The gasket joint portion and the muffler joint portion were connected by a connecting member.

[0007]

[Effect]

The first heat shield part is held between the cylinder and the muffler, and the gasket joint part and the muffler are held together. The muffler gasket can be installed by connecting the hula joint with the connecting member. It is carried out. Therefore, when installing or removing the cover, use the muffler gasket. There is no interference between the I can do it. Also, when the muffler gasket inherently vibrates during engine operation, This may cause the muffler gasket to repeatedly hit surrounding components. This also prevents the durability of the muffler gasket and surrounding components from deteriorating. be done.

[0008]

【Example】

An embodiment of the present invention will be described based on FIGS. 1 and 2. In addition, in Figures 3 and 4 Components that are the same as those described above are designated by the same reference numerals, and their explanation will be omitted. Cylinder A muffler 2 is arranged adjacent to the side of the cylinder 1, and these cylinders 1 and muffler 2 A cover 12 is provided to cover the. Furthermore, the cylinder 1 and the muffler 2 A fuel tank 4 is arranged below.

[0009] Next, a first heat shielding part 7 that partitions between the cylinder 1 and the muffler 2 and this third The muffler 2 and the fuel tank are bent at a substantially right angle to the heat shielding part 7. A muffler gasket 13 having a second heat shielding part 8 that partitions between the The first heat shielding part 7 is held between the cylinder 1 and the muffler 2. . Further, a gasket joint portion 14 having a substantially L-shaped cross section is provided, and this gas The socket joint part 14 is fixed to the second heat shield part 8 by a rivet 15. difference Furthermore, a muffler joint 16 is fixed to the lower part of the muffler 2, and this muffler The coupling part 16 and the gasket coupling part 14 are coupled by a screw 17 which is a coupling member. has been done.

0010 In such a configuration, when connecting the muffler 2 to the cylinder 1, these cylinders are The first heat shield part 7 is sandwiched between the cylinder 1 and the muffler 2, and the second heat shield part 8 is sandwiched between the muffler 2 and the cylinder 1. and the fuel tank 4. The first heat shield part 7 connects the cylinder 1 to the exhaust port. It seals the exhaust gas flowing into the muffler 2 through the inside of the muffler 2. It shields cylinder 1 from heat, and further protects cylinder 1, crankcase 18 and fuel. It acts as a cooling air guide plate that guides the cooling air that cools the tank 4.

[0011] Next, the gasket joint part 14 fixed to the second heat shield part 8 with a rivet 15 and a muffler joint 16 fixed to the muffler 2 are tightened and fixed with screws 17. No. The second heat shielding part 8 shields the fuel tank 4 from the heat of the muffler 2 and also protects the cylinder 1 and the like. As a cooling air guide plate that guides the cooling air that cools the crankcase 18 and fuel tank 4. act.

0012 Next, install the muffler 2 to the cylinder 1 and install the muffler gasket 13. After the installation is completed, a cover 12 covering the cylinder 1 and muffler 2 is installed. This card Since the bar 12 can be installed independently of the muffler gasket 13, It is necessary to bend the muffler gasket 9 as in the conventional example explained in FIG. Therefore, the cover 12 can be easily installed without any trouble. In addition, cover 12 Even when removing the cover 12, it can be done independently of the muffler gasket 13. It can be easily removed without any hassle.

[0013] Further, the muffler gasket 13 is installed in a state separated from the cover 12, and Furthermore, the first heat shield part 7 is held between the cylinder 1 and the muffler 2, and the second heat shield part 7 is held between the cylinder 1 and the muffler 2. Since the hot part 8 is fixed to the muffler 2, the muffler gasket is The gasket 13 vibrates integrally with the muffler 2, etc., and the muffler gasket 13 This prevents the vibration from occurring repeatedly and repeatedly hitting surrounding components such as the muffler 2. . Therefore, the durability of the muffler gasket 13, muffler 2, cover 12, etc. decreases. This prevents damage from occurring due to decreased durability.

[0014] Note that in this embodiment, the gasket engaging portion 14 is connected to the muffler gasket 13. The explanation has been given using an example where the A gasket engaging portion 14 such as the one formed integrally with the muffler gasket 13. It may be.

[0015]

[Effect of the idea]

The present invention has a muffler disposed adjacent to the cylinder as described above, and In an engine equipped with a cover that covers the cylinder and muffler, When the first heat shield part that partitions between the frame and the first heat shield part is bent at a substantially right angle to the Both muffler gaskets are provided with a second heat shielding part that covers the lower side of the muffler. The first heat shield is sandwiched between the cylinder and the muffler, and the gas is provided in the second heat shield. This is achieved by connecting the jacket joint to the muffler joint provided on the muffler using a connecting member. Therefore, when installing or removing the cover, be careful not to interfere with the muffler gasket. There are no sharp edges, so you can easily install and remove the cover without any hassle. Also, when the engine is running, the muffler gasket inherently vibrates and causes damage to the surrounding areas. The muffler gasket can prevent repeated collisions with the material. It is possible to prevent deterioration in the durability of It has effects such as being able to prevent damage accidents from occurring.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention.

FIG. 2 is a side view with the cover removed.

FIG. 3 is a longitudinal sectional front view showing a conventional example.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

[Explanation of symbols]

1 cylinder 2 Muffler 7 First heat shield part 8 Second heat shield part 12 Cover 13 Muffler gasket 14 Gasket joint 16 Muffler joint 17 Connecting member

Claims (1)

[Scope of utility model registration request] Claim 1: An engine including a muffler disposed adjacent to a cylinder and a cover covering the cylinders and the muffler, wherein a first heat shield part partitioning between the cylinder and the muffler; A muffler gasket is provided, the muffler gasket having a second heat shielding part that is bent at a substantially right angle to the heat shielding part and covering the lower side of the muffler, and the second heat shielding part is provided with a gasket coupling part, and the second heat shielding part is provided with a gasket coupling part and the lower part of the muffler is bent. A muffler gasket for an engine, characterized in that a muffler coupling part is provided in the part, the first heat shielding part is sandwiched between the cylinder and the muffler, and the gasket coupling part and the muffler coupling part are coupled by a coupling member. Mounting structure.