JPH0620682Y2 - Agricultural tractor engine cooling structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an engine cooling structure for an agricultural tractor.

[Conventional technology]

In the engine cooling structure of this type of agricultural tractor, conventionally, a radiator is arranged further in front of an engine equipped with a front blowing type cooling fan, and cooling air passing through the radiator is discharged from the front side of the engine bonnet. Was adopted (for example, Japanese Utility Model Publication No. 61-198119).

[Problems to be solved by the invention]

In this case, since it takes the form of discharging from the front of the engine bonnet, for example, compared to the form of discharging the cooling air (hot air) passing through the radiator from the rear side of the engine bonnet toward the driver's seat, Although it has the advantage that hot air does not act, the radiator is located on the lower side of the cooling air than the engine, so the cooling air (hot air) heated by the engine exhaust heat acts on the radiator and removes heat from the radiator. Since the cooling air is hotter than when it is introduced from the outside air as it is, heat exchange in the radiator is not sufficiently performed, and therefore there is a problem that the amount of circulating water in the radiator must be increased.

An object of the present invention is to provide a cooling airflow that can effectively act on the radiator and a sufficient cooling effect on the engine bonnet by providing a simple arrangement. is there.

[Means for solving problems]

The characteristic structure according to the present invention is that a cooling air intake port is provided on the driver's seat side at the rear of the engine bonnet, a radiator whose rear surface faces the intake port, and a front side of the radiator in front of the radiator. The points at which the engines equipped with blow-out type cooling fans are respectively arranged, the points at which partition walls are provided with a predetermined distance from the inner surface of the engine bonnet peripheral wall, and the cooling air inlets formed by these peripheral walls and the partition walls corresponding to the peripheral walls And the cooling air exhaust port are provided so that the cooling air intake port faces the front surface of the radiator and the cooling air exhaust port faces the rear surface of the cooling fan, respectively. Is the street.

[Action]

(A) Due to the characteristic configuration, the cooling air that acts on the radiator is just after being introduced from the outside air, so cooling is performed compared to the case where the one that has finished heat exchange with the engine exhaust heat is actuated as in the past. The temperature of the wind can be lowered.

Due to the characteristic configuration, the cooling air that has passed through the radiator can be continuously applied to the engine body, and the engine can be cooled.

With the characteristic configuration, by providing the partition wall, the cooling air can be forced to act on the peripheral wall of the engine bonnet. To explain this action in detail, since the cooling air discharge port faces the rear surface of the cooling fan, the air located in the space surrounded by the inner surface of the peripheral wall and the partition wall is sucked by the cooling fan,
As a result, new air is introduced into the space from the cooling air inlet, whereby the cooling air in the space flows, and, for example, the cooling air passing through the radiator is linearly sucked into the cooling fan. Compared with the case where the partition wall is not provided, a part of the cooling air that has passed through the radiator can be forcibly bypassed into the space, and the engine bonnet can be cooled.

[Effect of device]

The heat exchange rate with the radiator can be increased as much as the cooling temperature is lower than that of the action b, the cooling water circulation amount in the engine can be reduced, and the cooling air from the action b is released to the atmosphere immediately after acting on the radiator. Instead, since it is sucked by the cooling fan, it also comes into contact with the engine in the process and has a cooling effect on the engine body.

Further, because of the function c, a dedicated cooling structure can be configured for the engine bonnet, the cooling fan can be used as the one attached to the engine, and the simple structure of only providing the partition wall is required.

〔Example〕

As shown in Fig. 1, the engine hood at the front of the machine
The engine (2), radiator (3) and battery (4) are placed in (1), the control section (6) with the driver's seat (5) is placed in the middle of the fuselage, and at the rear of the fuselage. The mission case (7) is arranged to form an agricultural tractor.

Next, while connecting the engine (2) and the mission case (7) with the fuselage intermediate frame (11A) which also serves as a transmission case,
The machine body front frame (11B) cantilevered by the engine (2) is extended toward the front to form the machine body frame (11). With respect to the body frame (11), the engine bonnet (1), the handle transmission shaft storage section (10), the step (8) of the control section (6), and the wheel descending fender (9).
Is attached via a rubber vibration isolator (12) to adopt a vibration insulation structure.

Next, the cooling structure of the engine (2) will be described. On the upper surface of the engine bonnet (1) on the side of the driver's seat (5), a cooling air inlet (13) opening forward is provided, and this inlet (13)
Inside the lower bonnet (1), a radiator (3) in a forwardly tilted posture is arranged. On the rear side of this radiator (3) is the steering wheel (14) transmission shaft (15) storage chamber and radiator.
(3) An air guide plate (16) is provided to partition the storage chamber, and has a function of guiding cooling air from the suction port (13) to the rear surface of the radiator (3). The inside of the engine room is a closed space between the front surface of the radiator (3) and the rear surface of the engine (2) and between the front surface of the engine (2) and the fan shurawood (18) described later. Baffle plates (20), (20) are provided. An engine (2) is arranged on the front surface side of the radiator (3), and a front blowing type cooling fan (17) is provided on the front surface of the engine (2). A fan shura wood (18) that guides cooling air toward the cooling fan (17) is arranged on an outer peripheral portion of the cooling fan (17), and an exhaust port (1) formed by the fan shura wood (18) is formed.
From 9), cooling air that has exchanged heat with the radiator (3) and the engine (2) body is discharged.

As shown in FIG. 1 and FIG. 2, the ceiling wall (A) forming the peripheral wall (A) of the engine bonnet (1) corresponding to the engine housing chamber space partitioned by the radiator (3) and the fan shurawood (18) ( 21A) and left and right side walls (21B), (21B) are provided with ceiling partition walls (22) and side partition walls (23), (23) as partition walls having a predetermined interval. These ceiling walls (21
A), a ceiling partition wall (22) corresponding to the ceiling wall (21A), and a side partition wall (23) corresponding to the side wall (21B), which form a cooling air inlet (24) and a cooling air outlet (24). 25) are provided such that the cooling air inlets (24) face the front surface of the radiator (3), respectively, so that the cooling air that has passed through the radiator (3) is cooled by the ceiling wall (21A) and the ceiling partition wall (21A). 22) and a kind of duct space formed by the side wall (21B) and the side partition wall (23).

[Other Embodiments] Only the ceiling partition wall (22) corresponding to the ceiling wall (21A) may be provided as the partition wall.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of an engine cooling structure for an agricultural tractor according to the present invention. Fig. 1 is a vertical sectional side view of the agricultural tractor, and Fig. 2 is a sectional view taken along line II-II of Fig. 1. (1) …… Engine bonnet, (2) …… Engine, (3)…
… Radiator, (5) …… driver seat, (21A) …… ceiling wall,
(21B) Side wall, (22) (23) …… Partition wall, (24) …… Cooling air inlet, (25) …… Cooling air outlet, (A) …… Peripheral wall.

Claims (3)

[Scope of utility model registration request] 1. The driver's seat (5) at the rear of the engine bonnet (1)
Radiator with cooling air intake port (13) on its side and its rear surface facing the intake port (13)
(3) and in front of this radiator (3), arrange the engine (2) with the front blowing type cooling fan (17) attached to the front, and set it to the inner surface of the engine bonnet peripheral wall (A) The partition walls (22, 23) are provided at intervals, and the cooling air introduction port (24) formed by these peripheral walls (A) and the partition walls (22, 23) corresponding to the peripheral walls (A) is the radiator (3 ) With the front of the cooling air outlet (25) facing the cooling fan (1
7) An agricultural tractor engine cooling structure that is installed so as to face the rear surface. 2. The engine cooling for an agricultural tractor according to claim 1, wherein the partition wall (22) is formed corresponding to the ceiling wall (21A) of the peripheral wall (A). Construction. 3. The partition wall (22) corresponds to a ceiling wall (21A) of the peripheral wall (A), and the partition wall (23) is formed to correspond to a side wall (21B) of the peripheral wall (A). The engine cooling structure for an agricultural tractor according to claim 1, which is a utility model registration claim.