JP2562732Y2 - Intake duct - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake duct for introducing air into an intake system of a vehicle engine. More specifically, the present invention relates to an intake duct having a function of preventing rainwater from entering.

[0002]

2. Description of the Related Art Conventionally, there is known an intake duct in which a hood is provided at an upper end of a duct opened upward to cover the open end, attached to the back of a cab, and a lower part is connected to an air cleaner.

[0003]

However, in the intake duct of this structure, when raindrops that are transmitted down the hood and flow down to the lower end of the hood, the raindrops are easily introduced into the intake duct together with the inflowing air. Further, since the hood is larger than the outside diameter of the intake duct, a large space is required between the back of the cab and the front of the luggage compartment, and there is a problem that the volume of the luggage compartment is reduced by that much. An object of the present invention is to provide an intake duct that prevents rainwater from entering the inside of the duct and does not require much space between the back of the cab and the front of the luggage compartment.

[0004]

The configuration of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. The present invention is an improvement in the intake duct, which is sealed at the top, has an air intake 18 on the side, and is attached to the back of the cab 10 and connected to the air cleaner 14 at the bottom. The characteristic configuration is that an air intake frame 19 having a flange 19b on the periphery is provided at the air intake port 18,
The flange 19b forms a rain receiving groove 20 with the duct surface 12b at a distance from the duct surface 12b near the air intake port 18, and the frame mounting surface 19 of the air introducing frame 19 is formed.
a is attached to a peripheral edge 18 a of the air intake 18 and has a plurality of wind guide plates 22 for guiding air into the duct 12 in the air introduction frame 19.

[0005]

The raindrops B flowing down from the upper part of the duct during rainfall reach the air intake 18 and collect in the rain receiving groove 20 formed by the duct surface 12b near the air intake 18 and the upper flange 19b of the air introduction frame 19. , Air introduction frame 19
Do not flow into. On the other hand, the air flow C along the duct surface 12b climbs over the flange 19b of the air introduction frame 19, is guided by the wind guide plate 22 in the air introduction frame 19, and flows into the intake duct.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 3, an intake duct 12 is attached to a rear surface of the cab 10 by a plurality of attachments 11. The lower portion of the intake duct 12 is connected to an air cleaner 14 via a cylindrical rubber 13. The air cleaner 14 is fixed to a bracket 17 fixed to a chassis frame 16. The intake duct 12 is a substantially triangular cylindrical synthetic resin molded body whose upper part is sealed, and the sealing part 12a has an inclined surface descending rearward and is provided at a position not protruding from the roof panel of the cab 10. Can be As shown in detail in FIG. 1, a square window-shaped air intake 18 is provided on the side of the duct immediately below the sealing portion 12a. This air intake 1
Numeral 8 is provided over the two surfaces of the duct rear surface and the duct side surface, and its peripheral edge 18a is formed to be slightly recessed into the duct.

The air intake 18 is provided with a synthetic resin air introduction frame 19 having a flange 19b on the periphery. The air introduction frame 19 is formed so as to expand in four directions toward the flange 19b on the periphery. The flange 19b of the air introduction frame 19 is connected to the duct surface 1 near the air intake port 18.
A rain receiving groove 20 is formed with the duct surface 12b at an interval from 2b, and extends substantially parallel to the duct surface 12b. The frame mounting surface 19a of the air introduction frame 19 is the air inlet 1
And a synthetic resin clip 21 joined to the peripheral edge 18a
Mounted by As shown in detail in FIGS. 1 and 2, twelve clips 21 are provided on the entire circumference of the frame mounting surface 19 a. It is a fixture that integrates with the peripheral edge 18a. A plurality of slitted air guide plates 22 for guiding air into the duct are provided in the air introduction frame 19. The air guide plate 22 is integrally formed of a resin together with the frame mounting surface 19a and the flange 19b of the air introduction frame 19, and has an inclined air guide portion 22a and a vertical portion 22 for dropping raindrops.
b. In order to more reliably prevent the infiltration of raindrops, the air guide portion 22a has an inclined surface that rises toward the inside of the duct.

Next, the operation of the intake duct 12 having such a configuration will be described. Slope 12a of intake duct 12 during rainfall
When the raindrops B (FIG. 1) flowing down from the air intake 18 reach the air intake 18, they collect in the rain receiving groove 20 formed by the duct surface 12 b near the air intake 18 and the upper flange 19 b of the air introduction frame 19, It flows down to the lower part of the duct through the groove formed by the flange 19b and the duct surface 12b. Also, the raindrops that have fallen near the air guide plate 22 of the air introduction frame 19 try to enter the duct together with the inflowing air, but after hitting the vertical portion 22b or the inclined air guide portion 22a of the air guide plate 22, As a result, the liquid drops from the lower end of the vertical portion 22b to the lower flange 19b, and flows downward from there. Accordingly, it is possible to prevent rainwater from entering the inside of the duct. In particular, since the upper sealing portion 12a is a slope that descends rearward without protruding from the roof panel, the flow velocity of air flowing down the slope 12a along the roof panel becomes relatively large except during low-speed running, The rainwater that reaches the air intake 18 after being transmitted to the duct surface 12b does not enter the duct, but flows more easily toward the lower part of the duct. On the other hand, the duct surface 12
The air flow C (FIG. 1) along the line a is separated from rainwater by the flange 19b of the air introduction frame 19, gets over the flange 19b, is guided by the wind guide plate 22 in the air introduction frame 19, and flows into the intake duct. .

In the above example, a triangular cylindrical intake duct is shown, but it may be cylindrical or other rectangular cylindrical. In addition, although the square window-shaped air intake is shown, other shapes such as a round window shape and an elliptical window shape may be used.

[0010]

As described above, according to the present invention, the flange of the air introduction frame projecting from the surface of the duct efficiently separates water and water, so that rainwater can be prevented from entering the inside of the duct. Further, since the conventional hood is not required, there is an advantage that a large space is not required between the rear surface of the cab and the front surface of the luggage compartment, and the volume of the luggage compartment is not reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an air intake duct according to an embodiment of the present invention;
A sectional drawing expanded on the A line.

FIG. 2 is an enlarged perspective view of a main part of the intake duct.

FIG. 3 is an external perspective view of a cab equipped with the intake duct.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cab 12 Intake duct 12b Duct surface 14 Air cleaner 18 Air intake 18a Air intake periphery 19 Air introduction frame 19a Frame mounting surface 19b Flange 20 Rain catch groove 22 Wind guide plate

Claims (1)

(57) [Scope of request for utility model registration] The upper part is sealed, and the side has an air inlet (1).
8) is provided, and is attached to the back of the cab (10) and has a lower part connected to the air cleaner (14), wherein the air intake frame (18) has a flange (19b) around the periphery thereof. (19) is provided, and the flange (19b) forms a rain receiving groove (20) with the duct surface (12b) at an interval from the duct surface (12b) near the air intake port (18), A frame mounting surface (19a) of the air introduction frame (19) is joined and attached to a peripheral edge (18a) of the air intake port (18), and air is introduced into the air introduction frame (19) in the duct (12). Characterized in that it has a plurality of air guide plates (22) for guiding to the air intake duct.