JPS594813Y2 - Engine cooling air exhaust structure - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an engine cooling air exhaust structure for agricultural vehicles such as passenger chemical spray vehicles and passenger transport vehicles in which an air-cooled engine is disposed close to the driver's seat.

In a conventional agricultural vehicle of this type, for example, a passenger liquid chemical spray vehicle, wheels (not shown) and a chemical liquid spray pump (not shown) are installed adjacent to the side of the driver's seat 51, as shown in FIG. An air-cooled engine 52 for driving is arranged, and cooling air 5 sent from a blower fan 53 of this air-cooled engine 52 is provided.
Driver's seat 51 and engine 5 so that the engine 5 does not hit the driver.
Generally, a slow closing plate 55 for the cooling air 54 is installed between the cooling air 54 and the cooling air 54.

However, in this configuration, the high-temperature cooling air 54 after cooling the engine is not sufficiently discharged to the outside of the vehicle body from the opening 57 at the bottom of the vehicle body 56, and a portion of it hits the delay closing plate 55 and flows toward the engine 52 and backflows 54a. As a result, there is a drawback that the cooling effect decreases, causing overheating of the engine 52, or the air cleaner 58 sucks in this backflowing high temperature cooling air 54a, causing a decrease in output or knocking. Ta.

This idea provides a duct wall on the side opposite to the slow closing plate of an air-cooled engine, and the duct wall and the slow closing plate can be used to
The belt cover that protects the power transmission belt, the duct wall, and the slow closing plate form a cooling air exhaust passage that guides the high temperature cooling air after engine cooling to the opening at the bottom of the vehicle body.
It is an object of the present invention to provide an engine cooling air discharge structure that eliminates the above-mentioned conventional drawbacks by smoothly discharging the high-temperature cooling air from the opening to the outside of the vehicle body without flowing back toward the engine.

Embodiments of this invention will be described below with reference to the drawings.

In FIGS. 1 to 4, 11 is a vehicle body of a passenger chemical liquid spray vehicle, 12 is a driver's seat mounted on the vehicle body 11, and 13 is an air-cooled engine located close to the right side of the driver's seat 12.
It is mounted on the vehicle body 11.

14 is a blower fan that generates cooling air 15 for the air-cooled engine 13, 16 is an air cleaner, 17 is a muffler, 18 is a fuel tank, 19 is a transmission, 20 is a transmission 19 to the engine 1
3 is a belt that transmits power, and 21 is a belt cover that protects the belt 20.

Reference numeral 22 denotes a slow closing plate for the cooling air 15 that is installed between the driver's seat 12 and the engine 13 .
Therefore, the cooling air 15 cools the engine 13 and then heads toward the delay closing plate 22 .

Reference numeral 23 denotes a duct wall provided on the side of the engine 13 facing the late closing plate 22, and is fixed to the engine 13 with bolts 24. As shown in FIG. The plate 22 and the belt cover 21 form a cooling air discharge passage 26 that guides the cooling air 15 after cooling the engine to the opening 25 in the lower part of the vehicle body 11.

27 is a wheel, 28 is a driving lever, and 29 is a chemical tank.

In this embodiment, a part of the cooling air discharge passage 26 is formed by the belt cover 21, but if the belt cover 21 is not installed, the duct/wall 23 and the slow closing plate 22 can provide cooling. The duct wall 23 may be configured so that the wind exhaust passage 26 is formed.

In other words, the cooling air discharge passage 26 is at least connected to the duct wall 2.
3 and a slow closing plate 22.

According to the above configuration, at least the duct wall 23 and the slow closing plate 22
Although a cooling air exhaust passage 26 leading from the engine 13 to the opening 25 at the bottom of the vehicle body 11 is formed, the high temperature cooling air 15 sent from the blower fan 14 after cooling the engine 13 is discharged from the It is guided through the passage 26 and smoothly discharged from the opening 25 to the outside of the vehicle body without flowing back toward the engine 13.

Therefore, unlike conventional systems, the cooling effect is reduced due to the backflow of high-temperature cooling air, causing the engine to overheat.
There is no risk of causing a drop in output or knocking due to back-flowing high-temperature cooling air being sucked in from the air cleaner.

Moreover, since the high-temperature cooling air 15 is completely discharged downward from the vehicle body 11, there is no fear that the cooling air 15 leaks upward and adversely affects the driver or the cargo at the rear.

Furthermore, since the cooling air discharge passage is formed by at least the duct wall and the slow closing plate, the duct wall is lightweight and has a simple structure.

Furthermore, as in the above embodiment, if the belt cover 21 is also used, the duct wall becomes even lighter and has a simpler structure.

[Brief explanation of drawings]

Fig. 1 is a side view showing the main parts of a passenger chemical spray vehicle having an engine cooling air discharge structure according to this invention, Fig. 2 is a plan view of the same, and Fig. 3 is a view taken from the three directions of the arrows in Fig. 2. A perspective view, FIG. 4 is a sectional view taken along line 4--4 in FIG. 2, and FIG. 5 is a sectional view corresponding to FIG. 4 showing a conventional example. 11...Vehicle body, 12...Driver's seat, 13...Air-cooled engine, 14...Blower fan, 15...Cooling air, 1
6...Air cleaner, 21...Belt cover, 22
... slow closing plate, 23... duct wall, 25... opening,
26...Cooling air discharge passage.

Claims (1)

[Scope of utility model registration request] A slow-closing plate for engine cooling air is erected between the driver's seat and an air-cooled engine located close to the driver's seat, and a blower fan for the engine is installed opposite to the side of the engine that faces the slow-closing plate. A duct wall is provided on the side opposite to the slow-closing plate of the engine, and at least the duct wall and the slow-closing plate direct the cooling air after cooling the engine to the lower part of the vehicle body. The engine cooling air discharge structure has a cooling air discharge passage leading to the opening of the engine, and smoothly discharges the cooling air from the opening to the outside of the vehicle body without flowing back toward the engine.