JPH0224224A - Motor port structure of farm tractor - Google Patents

Abstract

PURPOSE:To prevent the staying of a high temperature exhausted air on the lateral sides of an engine and improve the cooling effect by providing a ventilation duct leading a part of the cooling exhausted air after passed through a radiator from the neighborhood of a cooling fan to the front part of a bonnet, from which the exhausted air is exhausted to the outside of the machine. CONSTITUTION:A farm tractor has a motor part 3 disposed within a bonnet 2 in the machine front part. The motor part 3 is formed of an engine 10, a radiator 11 disposed in the rear thereof, and a cooling fan 12 disposed between them. In this case, a ventilation duct 14 is disposed, which leads a part of a cooling exhausted air after passed through the radiator 11 from the neighborhood of the cooling fan 12 to the front part of the bonnet, from which the exhausted air is exhausted and guided to the outside of the machine. Namely, each opening 15 is formed on the lateral sides of the cooling fan 12 on the lateral both side surfaces of the bonnet 2, and each exhaust port 16 communicated to each opening 15 is formed in the front part of the bonnet 2. Hence, the staying of the high temperature exhausted air on the lateral sides of the engine 10 is prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention includes an engine mounted inside the hood at the front of the aircraft body, a radiator arranged behind the engine, and a radiator connected to the engine. This invention relates to a structure of a driving part of an agricultural tractor in which a radiator cooling fan is installed between the engine and the engine to generate engine cooling air toward the front of the machine.

[Conventional technology]

In the conventional structure described above, the air generated by the radiator cooling fan passes through the radiator and is sucked in, and the entire amount of air passes through the engine room and is discharged to the outside of the aircraft from the front grille at the front end of the bonnet. It had become.

[Problem to be solved by the invention]

The above structure is configured to exhaust the engine cooling exhaust air from the front end of the aircraft, which is far away from the control section, to prevent hot air from falling on the operator, and to reduce noise. This design was designed to allow hot air from above to be exhausted to the outside of the machine.

However, among the exhaust air heated by passing through the radiator, the air that passes above the engine flows smoothly forward, but the air that hits the rear wall of the engine flows toward the side of the engine. The problem is that the flow velocity decreases when it hits the inner surface of the bonnet and tends to stay in the engine room, reducing the cooling efficiency of the engine.

An object of the present invention is to smoothly discharge high-temperature exhaust air after passing through a radiator to the outside of the machine.

[Means to solve the problem]

A feature of the present invention is that in the drive unit structure of an agricultural tractor having the above configuration, a part of the cooling exhaust air after passing through the radiator is guided from the vicinity of the cooling fan to the front of the hood to be discharged to the outside of the machine. There is a ventilation duct installed.

[For production]

In other words, even if some of the high-temperature exhaust air that flows forward by the cooling fan after passing through the radiator hits the rear wall of the engine and flows to the side, the exhaust air will flow through the ventilation duct. and guided to the front of the hood,
It is smoothly ejected from the aircraft.

〔Effect of the invention〕

As a result, there is no risk of high-temperature exhaust air remaining on the side of the engine, and the flow of engine cooling air becomes smoother.
Engine cooling efficiency has been improved.

Additionally, it is conceivable to form an exhaust opening in the side wall of the bonnet near the cooling fan to achieve the above-mentioned effect, but this would result in a large amount of noise for the operator and cause problems for the operator. Inconveniences such as being exposed to hot air occur, but the present invention does not cause such problems.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 3 shows an agricultural tractor according to the present invention. This agricultural tractor is equipped with a control section (1) above the rear of the machine body, and a driving section (3) located inside the bonnet (2) at the front of the machine body.
) are arranged and configured.

The bonnet (2) is configured to be able to swing open and close around the upper part of the rear part, and when the bonnet (2) is opened from the closed state by swinging, the swinging angle is small, and as it is opened, the swinging angle becomes larger. It is configured. In other words, as shown in Figure 4,
A bracket (4) extends downward from the rear upper surface of the bonnet (2) and a fuel tank support frame (7) extends forward from the fuel tank support frame (7) for supporting the fuel tank (6) located inside the control post (5). bracket (8).

(8) and a pair of pivot links (9a) having different lengths.

(9b) to form an opening/closing support mechanism.

Next, the structure of the driving section (3) will be explained.

As shown in Fig. 1, an engine (10) is mounted inside the bonnet (2), and a radiator (11) is installed behind the engine (10). Radiator cooling fan (1
2) is provided. The cooling fan (12) is disposed close to the radiator (11), is driven and rotated by the rotational output of the engine (10), and is configured to generate engine cooling air toward the front of the aircraft.

Almost all of the cooling air generated by the cooling fan (12) is sucked through the radiator (11), passes above the engine (10), and is delivered to the engine from the front grill (13) in front of the bonnet (2). It is designed to be discharged outside. A portion of the cooling exhaust air after passing through the radiator (11) is directed from the vicinity of the cooling fan (12) to the bonnet (
2) Ventilation duct that leads to the front and guides exhaust air outside the machine (1
4) is provided.

To be more specific, openings (15), (15) are formed on the sides of the cooling fan (12) on both the left and right sides of the bonnet (2), and the openings (15) are formed on the outer side of the bonnet (2). , communicates with (15), and connects to the bonnet (
2) At the front part, ventilation ducts (14), (14) having exhaust ports (16), (16) formed therein are mounted and fixed.

By providing such ventilation ducts (14), (14), even if the cooling exhaust air that has passed through the radiator (11) hits the rear wall of the engine (10) and flows to both the left and right sides, the outflow exhaust air can be prevented. The wind flows through the ventilation duct (14
), (14) are guided and discharged to the front of the aircraft,
It does not stay in the engine room.

[Another example]

The ventilation duct (14) may be provided on the inner surface of the bonnet (2), as shown in FIG.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure of the driving part of an agricultural tractor according to the present invention, in which Fig. 1 is a plan view, Fig. 2 is a front view, Fig. 3 is a side view, and Fig. 4 is a side view showing the bonnet opening/closing support mechanism. figure,
FIG. 5 is a front view of another embodiment. (2>...bonnet, (10)...
Engine, (11)...Radiator, (12)
......Cooling fan, (14)...Ventilation duct.

Claims (1)

[Claims] An engine (10) is mounted inside the bonnet (2) at the front of the aircraft, and a radiator (10) is mounted behind the engine (10).
11) and a radiator cooling fan (12) between the engine (10) and the radiator (11) that generates engine cooling air toward the front of the machine body. A part of the cooling exhaust air after passing through the radiator (11),
A structure of a driving unit of an agricultural tractor, which is provided with a ventilation duct (14) that guides air from the vicinity of the cooling fan (12) to the front of the bonnet (2) and guides the exhaust to the outside of the machine.