JPH07237458A - Prime mover part structure for work vehicle - Google Patents

Abstract

PURPOSE:To cool an operating oil tank and a fuel tank at a low cost further without causing enlarging a size by rationally utilizing cooling discharge air of an engine with a simple structure, in a prime mover part structure for a work vehicle, providing an engine storage part of storing the engine and a tank storage part of storing the operating oil tank and the fuel tank, and arranging these parts in an L shape as viewed in a plan. CONSTITUTION:An air control plate 16 for guiding partly cooling discharge air of an engine to a tank storage part is provided in an engine storage part 12, and further an operating oil tank 13 of the tank storage part is arranged so as to be in the upstream relating to cooling discharge air of the engine 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prime mover of a work vehicle, which is provided with an engine housing for housing an engine, a tank housing for housing a hydraulic oil tank and a fuel tank, and which are arranged in an L shape in plan view. Regarding the structure.

[0002]

2. Description of the Related Art Conventionally, there is a technique disclosed in Japanese Utility Model Laid-Open No. 4-33757 as a technique constructed as described above, and in this conventional example, an engine housing portion and a tank housing portion are partitioned by a melting wall. It is independent and has a compact L-shaped layout.

[0003]

However, although the engine in the engine housing is cooled by the cooling fan,
Adjacent tank housings retain heat due to the exhaust heat of the engine and the hydraulic oil tank which itself becomes high in temperature, so that it is easy to cause functional deterioration due to the temperature of hydraulic oil and fuel increasing. In addition, a cooling means for attaching a cooling fan to the tank storage part in order to prevent problems due to high temperature can be considered, but it is difficult to secure a space for installing a cooling fan because it is arranged compactly.
At the same time, the cost is high.

An object of the present invention is to cool the hydraulic oil tank and the fuel tank at a low cost and without increasing the size of the engine, by utilizing the cooling exhaust air of the engine reasonably with a simple structure.

[0005]

A wind control plate for guiding a part of engine cooling exhaust air to a tank housing portion is provided in the engine housing portion, and a hydraulic oil tank of the tank housing portion serves as engine cooling exhaust air. On the other hand, it is arranged so that it is on the better side.

[0006]

In other words, a wind control plate is provided in the engine storage portion, and a part of the cooling exhaust air guided to the tank storage portion cools the hydraulic oil tank having a temperature higher than that of the cooling exhaust air. Also, the temperature rise of the fuel tank on the lower side due to the heat radiation is suppressed.

[0007]

As a result, the cooling exhaust air of the engine can be effectively utilized with a simple structure in which only the wind control plate is attached to the engine storage portion, so that it is not necessary to provide a cooling fan in the tank storage portion, and the cost is low. The present invention has made it possible to provide a hydraulic oil tank and a fuel tank that can be cooled without increasing the size of the hydraulic oil and can prevent functional deterioration due to high temperatures of the hydraulic oil and the fuel.

[0008]

Embodiments of the present invention will now be described with reference to the drawings of a small backhoe which is one of the work vehicles.

As shown in FIGS. 1 and 2, a swivel base 3 is provided on a traveling vehicle body having a dozer 1 and a crawler type traveling device 2 so as to be rotatable about a longitudinal axis and a boom tip side 4a.
The backhoe device 4 which can be operated by parallel refraction (offset) laterally, the driving part 5, the driver's seat 6, the control tower 7, and the cover 8 for covering the upper part of the driver's seat and the backhoe device mounting side. It is provided in Fig. 3 and constitutes a small backhoe with a dozer.

As shown in FIG. 3, at the rear of the swivel base 3 covered with a bonnet, there are an engine housing 12 in which a radiator, a cooling fan 10 and an engine 11 are arranged in this order, a hydraulic oil tank 13 and a fuel tank 14. As shown in FIG. 5, there is a tank storage portion 15 provided and a bonnet portion 9A that covers a part of the tank storage portion 15 and the engine storage portion 12 is supported by a slide rail (not shown) so as to be vertically slidable and openable. The bonnet portion 9A can be easily opened to perform maintenance work even in a narrow space.

As shown in FIG. 3, the cooling fan 10 provided in the engine housing 12 takes in the outside air for cooling the engine 11 from the outside air intake 9a of the bonnet 9 and cools the engine 11. Then, the cooling exhaust air of the engine 11 after cooling the engine 11 flows out from the lower part of the swivel base 3 to the outside, and a part thereof is guided to the tank storage portion 15 by the wind control plate 16 provided in the engine storage portion 12. Then, it is used as a cooling wind for the hydraulic oil 13 and the fuel tank 14, and flows out from the lower part of the swivel base 3. At this time, the operating oil tank 13 in operation is at a higher temperature than the cooling exhaust air of the engine 11, so the cooling exhaust air guided to the tank housing portion 15 is used as cooling air for cooling the operating oil tank 13. ,
It is possible to cool the hydraulic oil tank 13 and suppress a temperature rise due to heat radiation of the hydraulic oil tank 13 of the fuel tank 14 on the lower side.

Further, when the engine 11 is started in a cold region, the exhaust heat generated by the engine 11 is received by the hydraulic oil tank 13, so that the warm-up time of the hydraulic oil can be shortened.

[Other Embodiments] As shown in FIG. 4, a cooling exhaust air outflow hole 9b is provided in the bonnet 9 on the lower side of the engine housing for cooling air, and the lower side of the fuel tank 14 of the tank housing 15 is located below the fuel tank 14. The bonnet 9 may also be provided with an outlet hole 9c for the cooling exhaust air to improve the flow of the cooling air to the engine 11, the hydraulic oil tank 13 and the fuel tank 14 to enhance the cooling effect.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 Left side view of backhoe

FIG. 2 is a right side view of the backhoe.

FIG. 3 is a cutaway plan view showing the structure of a swivel base.

FIG. 4 is a cutaway plan view showing the structure of a swivel base according to another embodiment.

FIG. 5: Back view of backhoe

[Explanation of symbols]

 5 Drive part 9 Bonnet 9A Bonnet part 11 Engine 12 Engine storage part 13 Hydraulic oil tank 14 Fuel tank 15 Tank storage part 16 Wind control plate

Claims (1)

[Claims] 1. An engine housing (12) housing an engine (11) and a tank housing (15) housing a hydraulic oil tank (13) and a fuel tank (14), which are L-shaped in a plan view. In a structure of a prime mover of a work vehicle arranged in a line, a wind control plate (16) for guiding a part of cooling exhaust air of the engine (11) to the tank storage section (15) is provided in the engine storage section (12). A working part structure of a working vehicle in which the hydraulic oil tank (13) of the tank storage part (15) is arranged on the upper side with respect to the cooling exhaust air of the engine (11).