JPS6224750Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an engine cold air intake duct for a combine harvester.

(b) Prior art A shielding plate is installed in the engine ventilation duct for dust collection and noise reduction, as disclosed in, for example, Japanese Utility Model Application No. 56-65125 and Japanese Utility Model Application Publication No. 53-45330. As you can see, these conventional models have a structure where rainwater enters the casing of the engine room etc. and stays inside during rain or when washing the car, so rust can occur inside the casing. In addition, since rainwater enters the engine room, the air supplied to the engine combustion chamber becomes high in moisture, causing various troubles.

(c) Problems that the invention aims to solve Therefore, the present invention has developed an engine with an improved partition plate structure that not only has dust collection and noise reduction effects, but also effectively prevents rainwater from entering and accumulating in the engine room. It provides a cold air intake duct.

(D) Means for solving the problem That is, the present invention is a device that has two partition plates 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 70, 71, 72,
The upper partition plate 12 is installed obliquely to the ventilation passage, and the lower free end of the upper partition plate 12 is wrapped around the upper free end of the lower partition plate 13 with a vertical gap 11 therebetween, and the lowermost end of the lower partition plate 13 is connected to the drainage gutter 14.
The drain outlet 1 at the bottom end of the drain gutter 14 is connected to the drain outlet 1
5 communicates with the outside of the duct 8, and further each of the partition plates 12, 13 is configured as an engine cool air intake duct for the combine harvester, with the upper surface thereof made of a waterproof material 17 and the lower surface thereof made of a sound absorbing material 18.

(E) Function According to the engine cold air intake duct of the present invention, rainwater, etc. that enters the duct from the intake port is absorbed by the waterproof material 17.
Since it is collected in the drainage gutter 14 along the upper surfaces of the partition plates 12 and 13 formed by the partition plates 12 and 13, and is completely discharged from the duct outside the machine without being transferred to the engine room, rainwater does not enter the duct during rain or car washing. Even if rainwater does enter the engine, it prevents the rainwater from accumulating inside the engine compartment or moving into the engine room, thereby preventing problems such as internal rusting and high-moisture air supply to the engine combustion chamber. The sound absorbing material 1 arranged on the bottom side of the partition plate
8 is protected from rainwater and always effectively suppresses engine noise from escaping through the cold air intake duct.

(F) Embodiments Examples of the present invention will be described below with reference to the drawings.

In Fig. 1, A is a combine harvester, and an engine room 2 is arranged in the center of the vehicle body 1 of the combine A, and a seat 3, a control device 4, and a preprocessing section 5 are arranged in front of the engine room 2, and from the side of the engine room 2. A threshing section 6 is disposed astride the rear, and a running section 7 is provided below the vehicle body.

A cold air intake duct 8 is connected continuously to the upper surface of the engine room 2, and the cold air intake duct 8 is formed into a cylindrical shape as a whole as shown in FIGS. 2 and 3. A cold air suction port 9 is opened in the ceiling of the duct 8, and a wire mesh 10 is stretched over the cold air suction port 9 to prevent fragments of cut stems and culms from entering from the outside.

Further, below the cold air intake port 9, two partition plates 12 and 13 are installed vertically in parallel with each other with a vertical gap 11 for ventilation. The upper partition plate 12 is provided obliquely to the air passage of the duct, and the upper partition plate 12 is fixed with its inclined upper end as a mounting part.
The lower partition plate 13 wraps its inclined upper free end with the inclined lower free end of the upper partition plate 12 with a vertical gap 11, and its lower inclined end is connected to the inner wall of the duct via a gutter 14. Installed.

The gutter 14 is inclined in a direction perpendicular to the direction of inclination of the partition plates 12 and 13, and the lower end of the gutter is provided as a drain port 15 that communicates with the outside of the duct 8. A faucet 16 made of moltoprene or the like is inserted and fixed to allow only drainage. The upper surfaces of the partition plates 12 and 13 are made of a waterproof material 17 such as a waterproof iron plate or plastic, and the lower surfaces are made of a soundproof material 18 such as glass wool.

Although the engine in the engine room 2 is not shown, it is located below the cold air intake duct, and the cold air is passed through the window 19 on the side of the engine room 2.
It is designed to be discharged from

When the engine in the engine room 2 is started, the cold air enters the cold air intake duct 8 through the wire mesh 10 of the cold air intake 9 of the cold air intake duct 8, and enters the cold air intake duct 8 through the gap 11 between the partition plates 12 and 13. It flows in the solid line direction in FIG. 2 and is sucked into the engine room 2. During this time, the engine noise from inside the engine room 2 attempts to emanate from the cold air intake 9 in the ceiling through the cold air intake duct 8, but the partition plates 12, 1
3 It is absorbed by the sound absorbing material 18 on the lower surface, and the cold air inlet 9
This suppresses the divergence from the

On the other hand, the fact that the cold air intake 9 is located at the ceiling of the cold air intake duct 8 means that the engine noise is directed upwards and has less impact on the seats in the front of the engine room 2. However, it is even more effective when combined with the sound absorption effect mentioned above.
However, positioning the cold air intake 9 on the ceiling of the cold air intake duct 8 results in rainwater entering, but the incoming rainwater flows from the cold air intake 9 to the partition plate 12,
13, flows down the partition plates 12 and 13 as shown by the broken line arrows in FIGS. 2 and 3, passes through the gutter 14, and is discharged from the cold air suction duct 8 through the drain port 15.

(g) Effects of the invention As explained above, the invention has two vertically parallel ducts installed in the cold air intake duct 8 which is connected above the engine room 2 and whose ceiling is the cold air intake 9. When installing the partition plates 12 and 13 obliquely to the ventilation path, the lower free end of the upper partition plate 12 is wrapped around the upper free end of the lower partition plate 13 with a gap 11 in the vertical direction. In addition, the lowermost end of the lower partition plate 13 is communicated with the gutter 14, and the drain port 15 at the inclined lower end of the gutter 14 is opened to the outside of the duct 8. Furthermore, the partition plates 12 and 13 are connected to a waterproof material 17 on the upper surface side. Since the cold air intake duct is constructed with a sound absorbing material 18 on the lower side, consideration has been given to opening the cold air intake port 9 in the ceiling of the cold air intake duct 8 to minimize the influence of engine noise on the seat area. Even though it becomes easier for rainwater to enter the duct from the cold air intake port, the rainwater that enters the duct is ensured to be drained outside the duct before it reaches the engine room 2 and inside. Since there is no stagnation, unlike the conventional structure where rainwater, etc. that entered the inside of the casing remained, there is no possibility that the inside of the casing would rust due to stagnant water and cause early corrosion. Rainwater that entered the engine room 2
This has the advantage that the air supplied to the engine combustion chamber is prevented from becoming highly water-containing. And partition plate 1
Since the sound absorbing material 18 on the lower surface of 2, 13 effectively absorbs the engine sound heading toward the cold air intake 9, the intake 9
This also has the advantage that the engine noise is further reduced and work can be carried out more easily since it is located in a position where it has little influence on the seat.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the combine harvester according to the present invention, Figure 2 is an enlarged cross-sectional view of the main part of the cold air intake duct in Figure 1, and Figure 3 is a partially cutaway view of Figure 2 as seen from the direction of arrow H. be. 2...Engine room, 8...Cold air intake duct, 9...Cold air intake port, 11...Gap, 12,1
3... Partition plate, 14... Gutter, 15... Drain port, 1
6...Waterproof material, 17...Sound absorbing material.

Claims (1)

[Scope of utility model registration request] In a cold air intake duct 8 that is connected to the upper part of the engine room 2 and has a cold air intake port 9 in the ceiling,
When two vertically parallel partition plates 12 and 13 are installed obliquely with respect to the ventilation passage, the lower free end of the upper partition plate 12 is connected to the upper free end of the lower partition plate 13 with a vertical gap 11. , and the lowermost end of the lower partition plate 13 is communicated with the gutter 14 so that the gutter 14
An engine for a combine harvester characterized in that an inclined lower end drain port 15 is opened to the outside of the duct 8, and each of the partition plates 12 and 13 is formed with a waterproof material 17 on the upper surface side and a sound absorbing material 18 on the lower surface side. Cold air intake duct.