JPH0224225A - Tractor - Google Patents

Abstract

PURPOSE:To cool an engine efficiently without heating the driver's seat side by disposing a radiator in the rear of the engine, forming an outlet and inlet of cooling air in the front and rear of a bonnet covering said engine and radiator, and forming the face of the inlet in an expansion form. CONSTITUTION:A tractor is loaded with an engine 8 in the front of a driver's seat 4. In this case, a radiator 9 is disposed in the rear side of the engine 8. An inlet 12 and an outlet 14 of cooling air are formed in the rear and front sides of the radiator 9 in a bonnet covering the engine 8 and the radiator 9, respectively to pass the cooling air from the rear to the front. The face of the inlet 12 is formed in an expansion from in which the front side is expanded outward over the rear side. Hence, a sufficient amount of cooling air is passed from the inlet 12 to the outlet 14 through the radiator 9 and the engine 8 to cool the engine 8 efficiently without heating the driver's seat 4 side and narrowing its space.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tractor, and particularly relates to the arrangement of an engine and radiator located in front of a driver's seat and the structure of an inlet for cooling air supplied to the radiator. be.

In conventional tractors in which the engine is located in front of the driver's seat, the radiator is located in front of the engine. That is, conventionally, a radiator, an engine,
The seats are arranged in the order of the driver's seat, and the cooling air is discharged from the radiator side through the engine to the driver's seat side. Therefore, the cooling air heated by the engine is discharged to the driver's seat side, resulting in a high temperature in the driver's seat. In this case, if the cooling air is sucked in from the driver's seat side and discharged to the front side, the hot air warmed by the engine will also be sent out to the radiator side, which reduces the cooling efficiency. arise. Furthermore, in such a structure, for example,
In Publication No. 4, cooling air is sucked in from the radiator side, and hot air warmed by the engine is discharged through a duct in the direction opposite to the driver's seat. However, the disadvantage is that the structure is complicated and the bonnet becomes large. Conventionally, a radiator is placed at the rear of the engine so that cooling air flows forward from the driver's seat. For example, U.S. Pat.
Specification No. 2 describes such a thing.

Problems to be Solved by the Invention As described above, the above problems can be solved by arranging the radiator at the rear of the engine and causing cooling air to flow forward. However, in such a structure, if cooling air inlets are formed on both the left and right sides of the bonnet at the rear of the radiator, the rear end of the bonnet must be extended toward the driver's seat by the size of the inlets, which is insufficient. If a large entrance area is secured, this extension becomes large, which makes the driver's seat narrower, which inconveniences the driver's comfort. On the other hand, if the entrance area is made small, it will not be possible to secure sufficient cooling air volume, and the small area will also cause clogging, which can easily occur.Furthermore, if the entrance is on the side of the bonnet, it will be difficult to visually check the clogging situation during work. The disadvantage is that it is difficult to

The present invention has been made in view of the above points, and has a configuration in which, in a tractor in which an engine is mounted in front of the driver's seat, a radiator is disposed on the rear side of the engine,
A cooling air inlet is formed at a position on the rear side of the radiator and a cooling air outlet is formed at a position on the front side of the radiator on the bonnet that covers these radiators and the engine, so that the cooling air flows from the rear to the front. In addition, the surface of the cooling air inlet is formed in an expanded shape such that the front side of the inlet is wider outward than the rear side.

Function: With this configuration, cooling air is sucked in from the driver's seat side and exhausted to the front, so the driver's seat is not heated, while cooling air that enters the bonnet is first supplied to the radiator. Therefore, there is no loss of cooling efficiency. Moreover, since the cooling air inlet located at the rear of the radiator has an expanded shape with its front side expanding outward, the entrance area can be increased even if the rear end of the bonnet is shortened. The clogging status can also be easily checked from the driver's seat.

Embodiment Hereinafter, the structure of the present invention will be explained based on an illustrated embodiment. In the figure, (1) constitutes a vehicle body frame,
Further, it is an axle bracket that supports front and rear wheels (2) and (3), and a seat (4) is attached to the rear of this axle bracket (1), and furthermore, this seat (4)
A steering handle (5) is attached to the front of the axle bracket (1), protruding upward from approximately the center of the front and back of the axle bracket (1), and a steering handle (5) is attached to the side of the steering handle (5). A step (6) is attached, and the seat (4), the ffl direction steering wheel (5), the step (6), etc. constitute a driver's seat (7). The engine (8) is mounted on the axle bracket (1) in front of the driver's seat (7), and the radiator (9) that allows the cooling water of the engine (8) to pass through is located on the rear side of the engine (8). has been done. (10) these engines (
8) and the radiator (9). (11) is the bonnet, and the engine (8)
The engine (8) is mounted on the axle bracket (1) so as to cover the radiator (9), but in this embodiment, the engine (8) has a width in the left and right direction that is smaller than the radiator (9) Along with this, Bonnen) (
The side wall (11a) (lla) of 11) has a tapered shape extending forward from the side of the radiator (9) on the rear side, through the side of the engine (8), and from the side of the driver's seat (7). It is designed to provide good forward visibility. Moreover, its upper surface (llb) is also formed to have a steep downward slope toward the front, making visibility even better. (12) (1
2) is the side wall (11) of the bonnet (11) near the dash board (13) at the rear end of the bonnet (11).
In this embodiment, the cooling air inlet (12) (12) for the radiator (9) is formed in the side wall of the bonnet (11) near the dash board (13). (lla>
(lla) and the cooling air outlet (14) which is thus introduced into the bonnet (11)
is opened in the front wall of the bonnet (11). At that time, as shown in FIG. 2, the expanded shape (16
), and the above-mentioned cooling air inlet (12) is installed in this expanded shape part.
This entrance (12) by forming (12)
The surface of (12) has a similar expanded shape. Note that the cooling air outlet (14) may be formed at another position, for example, so as to be directed downward from the axle bracket (1). Further, the fan (15) of the radiator (9) may be driven by a shaft drive from the engine (8) via a belt or universal joint, or by hydraulic or electric motor drive. In particular, by driving the fan (15) by a motor that is not directly connected to the engine (8), and by placing the fan (15) on the radiator (9) side, it is possible to The installation angle can be freely selected, and the installation angle can be freely selected.
It becomes possible to increase the slope of the upper surface of the tapered shape (11).

Effects of the Invention The present invention has the above-mentioned configuration. In particular, in the present invention, a radiator is disposed between the engine and the driver's seat, and cooling air is sucked in from the driver's seat side, which is the rear of the radiator, and Since the air is discharged to the radiator side, the driver's seat is not heated, creating a better working environment than conventional models.The cooling air that enters the bonnet is first supplied to the radiator, which reduces cooling efficiency. I was able to obtain the effect that there is no problem. In addition, in the present invention, the surface of the cooling air inlet formed on the rear side of the radiator has an expanded shape with the front side expanding outward. Entrance area can be secured, and therefore, sufficient air volume can be ensured without sacrificing the space on the driver's seat side, and the structure can be designed to prevent clogging. Also,
By creating the above-mentioned expanded shape, it is possible to increase the leg space when riding a small tractor with the bonnet held between the legs, providing excellent comfort and improving the entrance area from the driver's seat. This has the effect of making it easier to visually check the clogging situation.

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing an embodiment of the present invention, with main parts taken longitudinally, and FIG. 2 is an overall plan view showing the main parts taken longitudinally. (7)...driver's seat, (8)...engine, (9)...
...Radiator, (11) Bonnet, (12)
...Cooling air inlet, (14)...Cooling air outlet, (1
6)... Expanded shape part.

Claims (1)

[Claims] In a tractor in which the engine is mounted in front of the driver's seat, a radiator is placed at the rear of the engine, and a cooling air inlet is placed at a position on the rear side of the radiator of the bonnet that covers these radiators and the engine, and also at a position in front of the radiator. A cooling air outlet is formed on the side so that the cooling air flows from the rear to the front, and the surface of the cooling air inlet is expanded so that the front side of the entrance is wider than the rear side. A tractor characterized by being formed into a shape.