JPS5856368Y2 - air cleaner - Google Patents

Description

[Detailed explanation of the idea] The present application relates to an air cleaner having a warm air introduction section.

An air cleaner for an internal combustion engine is provided with a warm air introduction section for introducing warm air heated by exhaust heat during a cold season.

An example of this is shown in FIG. 1. The air cleaner has a filter body 4 in a casing 5 and an intake pipe 3 in the casing 5.

A warm air pipe 2 is connected to the intake pipe 3, and one end of a flexible warm air introduction hose 8 is attached to the warm air pipe to form a warm air introduction section.

The other end of the warm air introduction hose 8 is arranged near the exhaust system of the internal combustion engine.

The intake pipe 3 located in front of the warm air pipe 2 encloses the cooling pipe 1, and a temperature sensing element 6 and a valve body 7 are arranged between the cooling pipe 1 and the warm air pipe 2.

When the atmospheric temperature is lower than a predetermined value, the valve body 7 is in the state shown in FIG. 1, and warm air is introduced into the air cleaner from the hot air pipe 2 and further supplied into the engine.

The conventional warm air introduction section has a structure in which a warm air introduction hose 8 is inserted into the outer periphery of a warm air pipe 2 and its end is fastened with a clamp 9, as shown in FIG.

Further, a notch is provided at the tip of the warm air introduction hose 8 to facilitate insertion into the warm air pipe 2.

However, in this case, the tightening force of the clamp gradually decreases due to external forces such as vibrations generated by the internal combustion engine.
There is a risk that the warm air introduction hose 8 will separate from the warm air pipe 2.

In order to improve this drawback,
For example, a structure using a connector means as shown in Japanese Utility Model Publication No. 4730114 may be used, but in this case, another problem arises in that it takes time and effort to attach the hot air introduction hose 8. Become.

Therefore, in the present application, an annular projection is provided at the base of the hot air pipe, and a louver-shaped protrusion is provided on the surface of the hot air pipe, and the warm air introduction hose is attached to the warm air pipe. By providing a connection structure in which the connection structure is easy to attach and difficult to detach.

To describe an embodiment, FIGS. 3 and 4 show a hot air introduction section of the air cleaner of the present invention, which is composed of a hot air pipe 10 connected to an intake pipe 31 and a hot air introduction hose 13.

The warm air introduction hose 13 is, for example, a model manufactured by Utility Model Publication No. 50-4514.
As shown in Publication No. 1, asbestos paper, glass fiber cloth, and thin aluminum plates are piled up to form a cylinder and compressed in the axial direction to form spiral irregularities on the surface. , heat resistant.

The hot air pipe 10 has a louver-shaped protrusion 11.1 on its surface.
1 .

The louver-shaped stamping 11 can be easily formed by stamping from the inside of the hot air pipe 10 outward, and its dimensions are a) 6 m in length in the case of a warm air pipe 10 with a diameter of 40 mm.
m, opening diameter (1)) 5 mm, height c) 1 mm,
There are 15 to 20 locations arranged at random (see Figure 5).

The louver-shaped embossing 11 is open toward the base of the warm air pipe 10.

The warm air introduction hose 13 used has an inner diameter slightly smaller than the outer diameter of the warm air pipe 10 after stamping.

As shown in FIG. 1, the warm air introduction section described above is attached to a housing 5 containing a filter 4 to form an air cleaner.

The warm air introduction hose 13 and the warm air pipe 10 are fitted together by first inserting the warm air introducing hose 13 into the warm air pipe 10, and then pushing the hose until its tip touches the surface of the suction pipe 31.

In this fitted state, the louver-shaped protrusion 11 of the warm air pipe 10 elastically presses the inner wall of the warm air introduction hose 13, and the annular protrusion 12 of the warm air pipe 10 engages with the uneven portion of the inner wall of the warm air introduction hose 13. I will do it.

Although external forces such as vibrations caused by the operation of the internal combustion engine act on the warm air introduction section, the warm air introduction hose 13 does not move in a direction away from the warm air pipe 10.

This is because the open end of the louvered embossment 11 abuts against the inner wall of the warm air introduction hose 13 and resists movement in the above direction.

As described above, the air cleaner of the present invention has a warm air introduction section that allows the hot air introduction hose to be easily inserted into the hot air pipe, but is difficult to separate from the hot air pipe. A stable and strong connection can be obtained just by

Moreover, smooth connection can be made without cutting or processing the warm air introduction hose.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an air cleaner having a hot air introduction section, FIG. 2 is a diagram showing a conventional hot air introduction section, FIGS. 3 and 4 are views showing a hot air introduction section of an air cleaner according to the present invention, FIG. 5 is a diagram showing the louvered embossing. 10... Warm air pipe, 11... Louver-shaped extrusion, 12... Annular projection, 31...
Suction pipe, 14... Warm air introduction hose.

Claims (1)

[Scope of utility model registration request] In an air cleaner that has a suction pipe connected to a hot air pipe in a casing with a built-in filter, an annular protrusion is provided at the root of the hot air pipe, and a louver-shaped protrusion is provided on the surface of the hot air pipe that opens toward the root. An air cleaner that is installed and connected by attaching a warm air introduction hose to the hot air pipe.