JPH0220426A - Mobile working vehicle with horizontal water-cooled engine - Google Patents

Abstract

PURPOSE:To ensure the large capacity of a fuel tank without any limitation caused by a radiator by placing the radiator at the rear side of the engine body with its heat radiating face held vertical. CONSTITUTION:An engine 7 consists of an engine body 9, a fuel tank 10 placed on said engine body 9, and a radiator 11 placed behind the engine body 9. The fuel tank 10 is placed above a cylinder part 12 and has a recess part formed at one side part on the rear bottom face of said tank as space 15 which contains engine supplementary equipment such as a battery. The radiator 11 with the heat radiating face thereof held vertical is placed behind a head block part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mobile work vehicle having a horizontal water-cooled engine mounted on the front portion of a main frame.

(Prior Art) Conventionally, in mobile work vehicles such as walk-behind tillers and riding tillers that are equipped with a horizontal water-cooled engine, there is a The horizontal water-cooled engine (51) is connected to its crankcase part (5
2) is located at the front, the fuel tank (53) is located above the crankcase part (52), and the radiator (55) is located above the cylinder part (54). Ta.

(Problem to be solved) In the horizontal water-cooled engines installed in conventional mobile work vehicles, water sloughs around the cylinders.

Since the lower tank of the radiator (55) is directly connected to the radiator, the radiator (55) is connected to one side of the cylinder (54), and the crankcase (55) is connected to the lower tank of the radiator (55).
A fuel tank (53) is arranged above each of the fuel tanks (52). In this case, since the fuel tank (53) and the radiator (55) are formed to fit in the upper part of the engine body (51), the fuel tank (53)
If the capacity of the radiator (55) is made large, the heat dissipation area of the radiator (55) will be narrowed and the engine cooling capacity will be reduced.If the heat dissipation area of the radiator (55) is made large to increase the cooling capacity, There was a problem in that the capacity of the tank (53) became smaller and the continuous operation time became shorter.

In addition, conventional mobile work vehicles are equipped with horizontal water-cooled engines (5
1) is placed and fixed near the front end of the main frame (50) J-, and the engine mounting part is attached to the bonnet case (56).
However, as mentioned above, since the radiator (55) and fuel tank (53) are placed above the engine body (51), the overall height of the engine mounting area at the front of the vehicle is high. , the height of the bonnet case (56) also increases. As a result, there is also the problem that it is difficult to see in front of the vehicle while working.

An object of the present invention is to provide a mobile work vehicle that has sufficient cooling capacity, can be operated continuously, and has a wide front visibility.

(Means for Solving the Problems) In order to achieve the object L, the present invention arranges the cylinders in a horizontal or slightly vertically inclined state, and injects fuel into the upper rear part of the engine body in a horizontal water-cooled engine. In addition to arranging the tank, a radiator is arranged at the rear of the engine body with its heat dissipation surface oriented vertically, and at least the front part of the top surface of the bonnet is formed into a forward-sloping slope. It is.

(Function) In the present invention, in a horizontal water-cooled engine in which the cylinders are arranged horizontally or slightly tilted up and down, the fuel tank is arranged at the rear part on the L side of the engine body, and
Since the radiator is placed at the rear of the engine body with its heat dissipation surface facing vertically, the fuel tank capacity can be increased without being restricted by the radiator, and the radiator can also be placed separately. By doing so, there is no need to restrict the heat dissipation area of the fuel tank.

Furthermore, by placing the radiator, which was conventionally placed on two sides of the engine body, separately on the rear side of the engine body, the center of gravity of the onboard equipment is lowered, improving safety against overturning, and reducing the heat dissipation area. Since it can be spread out, the flow velocity of the cooling air flow passing through the radiator can be slowed down, thereby reducing the intrusion of dust in a dusty atmosphere.

Moreover, since the fuel tank is located at the upper rear part of the engine body, the front part of the engine body on the -L side, that is, the front end of the vehicle body, is raised (there is no protruding object).
The upper surface of the bonnet can be formed into a downwardly sloping surface at least at the front portion thereof, thereby providing a wide front view of the working vehicle and improving work efficiency.

(Example) Fig. 1 is a longitudinal sectional view of the front part of a walk-behind tiller (υ), and Fig. 2 is a side view of the walk-behind tiller.

This tiller (1) is constructed from a main frame (3) facing forward from the main case (3) which pivotally supports the running wheels (2).
At the same time, pull out the handle (5) from the upper rear side of the mission case (3), and connect the working device (6) to the lower rear side of the mission case (3) [2. ) The horizontal water-cooled diesel engine (7) mounted and fixed on the Minon rigid case (3) is interlocked and connected, and the outer periphery of the engine (7) portion is covered with a bonnet 1-(8).

The engine (7) consists of an engine body (9), a fuel tank (10) placed on the engine body (9), and a fuel tank (10) placed on the rear side (Mitsushiran case side) of the engine body (9). The engine body (9) consists of a radiator (11), and a main frame (9) as shown in Figure 1.
4), the crankcase part (13) is placed on the Tl1l side with the cylinder part (12) inside, and the head block part (14) is placed on the rear side.

The fuel tank (10) is arranged above the cylinder part (12), and one side of the bottom of the fuel tank (10) near the rear is recessed to form an engine auxiliary equipment storage space (15) for accommodating engine auxiliary equipment such as a battery. is formed.

A lighting lamp (16) is located above the crankcase part (13).
), and this illumination lamp (16) is fixed to -Hy of the crankcase via a lamp stay (17).

The rasher (11) is disposed on the rear side of the head block portion (12) with its heat dissipation surface vertical.

The lower tank (1g) is connected to the bed jacket 1- formed in the rad block of the engine via the water pump (19) fixed to the main frame (4), and is connected to the upper tank (20) of the radiator (11). )
is connected to a connection port (2) formed in the earthen wall portion that closes the cylinder bracket formed in the cylinder portion (12). The symbol (22) in the figure is an electric motor for driving the radiator fan (23), and this electric motor (22) is connected to the radiator and head blower (14).
The cooling air flows from the engine side to the minocyrin case side, that is, from the front to the rear.

The bonnet (8) that covers the outer circumference of the engine (7)
) is the crankcase part (13) of the engine body (9)
Since only a short illumination lamp (16) is placed on the upper side and no tall parts are placed, its external shape should be formed so that the front half slopes downward. be.

In addition, in the above embodiment, the radiator fan (23)
It may be of a suction type or a discharge type, and the cooling air may be made to flow from the back to the front. Also,
The engine body (9) may be mounted on the main frame (4) with the head block (I4) located at the front of the vehicle body. Further, in the above embodiment, an example is shown in which the present invention is applied to a walking-type tiller, but the present invention may also be applied to a riding-type tiller, or to other mobile work vehicles.

(Effects) According to the present invention, in a horizontal water-cooled engine in which the cylinders are arranged horizontally or inclined slightly below -F, the fuel tank is arranged at the upper rear part of the engine body, and the fuel tank is arranged at the rear side of the engine body. Since the radiator is arranged with its heat dissipation surface facing vertically, it can be made larger without being restricted by the capacity of the fuel tank or the radiator, and the radiator can also be placed separately. Therefore, the heat dissipation area of the fuel tank is no longer restricted. Thereby, it is possible to provide a work vehicle that can perform continuous work for a long time without affecting cooling performance.

Furthermore, by placing the radiator, which was conventionally placed above the engine body, separately at the rear of the engine body, it lowers the center of gravity of the onboard equipment, improving safety against overturning, and widening the heat dissipation area ( The flow rate of the cooling air flow passing through the radiator is slowed down (
As a result, it is possible to reduce the intrusion of dust in a dusty atmosphere.

Moreover, since the fuel tank is located at the upper rear part of the engine body, it is located at the upper front part of the engine body.
In other words, since there is nothing that protrudes high at the front end of the vehicle body, the two sides of the bonnet can be formed into slopes that slope downward toward the front at least in the front part, and the forward visibility as a work vehicle can be widened. , which improves work efficiency.

[Brief explanation of the drawing]

Figures 1 and 2 show embodiments of the present invention, with Figure 1 being a longitudinal sectional view of the front of the walk-behind tiller, Figure 2 being a side view of the walk-behind tiller, and Figure 3 being a side view of the walk-behind tiller. FIG. 1 is a vertical sectional view of a main part showing a conventional technique. 4. Main frame, 7. Horizontal water-cooled engine, 8
...Bonnet, 9. Engine body, 10. Fuel tank, 11. Radiator.

Claims (1)

[Claims] 1. A mobile work vehicle having a horizontal water-cooled engine (7) mounted on the front part of the main frame (4) and covering the outer periphery of the engine (7) with a bonnet (8). In the water-cooled engine (7), a fuel tank (10) is arranged at the upper rear part of the engine body (9), and a radiator (10) is arranged at the rear side of the engine body (9).
A mobile work vehicle equipped with a horizontal water-cooled engine, characterized in that the bonnet (8) is arranged with its heat dissipation surface vertically oriented, and at least the front part of the top surface of the bonnet (8) is formed into a forward-sloping slope.