JPH11158915A - Engine hood for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently cool an engine and obtain an excellent heat balance by providing a part of bonnet catches in a plurality of bonnet catches at the side edge part of an radiator and providing other bonnet catches at other side edge parts, in an engine hood of a construction machine lockably provided with a plurality of bonnet catches. SOLUTION: An engine hood 20 bulges at the central part and the section is a trapezoidal shape and a space is formed between an engine 63 and a radiator 64. A plurality of slender cooling openings are formed at the upper central part 22 of the engine 63 and also a plurality of cooling openings are formed at the side of the radiator 64. Bonnet catches 68 are provided between the cooling openings or at the right side of the right opening and bonnet catches 11 are attached to the left side of the engine hood 20. Accordingly, the bonnet catches 11 do not obstruct formation of the cooling openings 22. And hence, the engine is sufficiently cooled and an excellent heat-balance can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of engine hoods for construction machines.

[0002]

2. Description of the Related Art In construction machines such as hydraulic excavators,
A house for housing equipment such as an engine, a radiator, and a hydraulic pump in addition to a cab (or cab) is provided on a platform of a construction machine. The house is formed by attaching a cover or the like to a frame. The engine hood is a cover provided above the engine as a cover for the engine and the radiator. The engine hood is openable and closable for inspection and repair of the engine or for replenishing cooling water, and is lockable by a bonnet catch. Further, an opening for air circulation is provided in the engine hood above the radiator in order to increase the cooling effect of the radiator. Hereinafter, a conventional engine hood will be described.

FIG. 3 is a diagram illustrating a hydraulic excavator as an example in which an engine hood is used. In FIG. 3, the upper revolving unit 5 is placed on the lower traveling unit 51 via the revolving unit 50.
2 is rotatably mounted. A platform 53 is provided on the upper swing body 52 as a base. A cab 54 is provided in front of the platform 53, and a house 52 is provided in the rear. Further, a counterweight 57 is attached to the rear end. Cab 5
A working machine 56 is attached to the side next to 4.

FIG. 4 is a view for explaining a conventional engine hood, and shows a top view of a house 55. FIG. The upper ceiling of the house 55 is covered with a plurality of covers. Inside the house, in addition to the engine 63 and the radiator 64, devices such as a hydraulic pump (not shown) are installed. Cover 60
Reference numeral denotes an engine hood, which is provided directly above an engine 63 and a radiator 64 provided on a platform 53, and has hinges 61, 62 provided at one end thereof so as to be openable and closable.

A plurality of openings 65 for cooling and two bonnet catches 67, 68 are provided on the opposite side, that is, on the side of the radiator, so as to be lockable. The bonnet catches 67 and 68 are provided between the openings 65 and 65 or partially over the openings 65.

[0006]

In the conventional apparatus, the cooling opening 65 and the bonnet catches 67 and 68 are provided on one side of the engine hood, so that the area for providing the cooling opening is limited. Further, a sufficient cooling effect cannot be obtained because the bonnet catch hinders the flow of air. Furthermore, the cooling opening is only one provided with a plurality of holes in a metal flat plate, and the radiator is not sufficiently cooled,
There is a problem that the engine is easily overheated.

The present invention has been made in view of the above background, and has as its object to provide an engine hood with an increased number of cooling openings, sufficient cooling of the engine, and excellent heat balance.

[0008]

To solve the above-mentioned problems, the following configuration is adopted. That is, in the device according to the first aspect, a radiator cooling opening is provided on the radiator side of the engine hood, a hinge is connected to the opposite side edge so as to be openable and closable, and a plurality of bonnet catches are provided so as to be lockable. In the engine hood of a construction machine, a part of the plurality of bonnet catches is provided at the radiator side edge, and the other bonnet catches are provided at other side edges.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating an engine hood 20 according to an embodiment of the present invention, and is a top view of a house. FIG. 2 is a sectional view taken along line XX of FIG. Figure 1,
2, the same components as those described in the conventional device (FIG. 4) are denoted by the same reference numerals, and detailed description thereof will be omitted. In these figures, the engine hood 20 has a central portion 22 which is expanded and has a trapezoidal cross section.
A space is provided between the radiator 3 and the radiator 64. A plurality of elongated cooling openings 23 are provided in a central portion 22 above the engine 63 and a radiator 64 is provided.
A plurality of cooling openings 24 are also provided on the side of the side.

The bonnet catch 68 is provided at a position similar to that of the conventional device or further on the right side. That is, the bonnet catch 68 is provided between the cooling openings 24 or on the right side of the right end opening 24. However, the hood catch 11 is provided at an appropriate position on the left side of the engine hood 20 so that it can be easily attached. In FIG. 1, a protrusion 12 is formed on a side of the engine hood 20, and a bonnet catch 11 is provided at that portion. Therefore, the hood catch 11 does not hinder the provision of the cooling openings 22 and 23, and is attached by selecting a side that is easy to attach. Note that the projection 12 does not need to be provided if there is enough mounting space on the left side.

The first embodiment is configured as described above and has the following operation and effects. In the engine hood 20 of the embodiment, the number of bonnet catches on the side where the cooling opening 65 is provided is smaller than that of the conventional device. Therefore, it is possible to increase the number of cooling openings or the total area of the openings, so that cooling of the radiator is more effectively performed, and the effect of overheating of the engine is obtained. Further, since the remaining bonnet catch does not interfere with the opening and is provided on the other side which is easy to attach, an effect of making the engine hood easier can be obtained.

Further, as shown in FIG. 2, there is a sufficient space between the engine hood 20 and the engine 63 and the radiator 64, and the outside cold air flows in from the opening 24, and the heated air and the cold air are cooled. Causes convection.
Therefore, the engine 63 and the radiator 64 are sufficiently cooled, and the overheating of the engine is further reduced.

Although the embodiments and examples of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the examples, and the design can be changed within a range not departing from the gist of the present invention. The present invention is included in the present invention.

[0014]

As described above, according to the structure of the present invention, the part of the bonnet catch provided in the opening is moved to another position in the apparatus of the first aspect, so that the flow of hot air is reduced. As a result, the effect of increasing the cooling effect and reducing the overheating of the engine is obtained.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention.

FIG. 2 shows a cross section taken along line XX of FIG.

FIG. 3 shows a hydraulic excavator embodying the present invention.

FIG. 4 shows a conventional device.

[Explanation of symbols]

 11, 68 Bonnet catch 20, 60 Engine hood 22 Convex part 23, 24 Opening 25, 26 Bonnet catch 61, 62 Hinge 63 Engine 64 Radiator 65 Opening

Claims (1)

[Claims] An engine hood for a construction machine, wherein a radiator cooling opening is provided at a radiator side of the engine hood, a hinge is connected to an opposite side edge of the engine hood to open and close, and a plurality of bonnet catches are provided to enable locking. 3. The engine hood of a construction machine according to claim 1, wherein a part of the plurality of bonnet catches is provided on the radiator side edge, and another bonnet catch is provided on a side edge other than the above.