JPH09302722A - Protector for power shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protector for a bonnet which gives good maintainability to an engine and is not damaged even after contacting to a loading platform of a dump truck. SOLUTION: A side protectors 11 and 12 are provided, which are projected out from a bonnet 6 when seen from the front and side faces at both the right and left sides of the rear end portion of an upper swing body 3 of a power shovel 1, and side protectors 10 and 11 are provided, which has a height h higher than the height H to the lower surface of the loading platform of a dump truck 20. A counterweight 12 projected out by c from the bonnet 6 is provided at a lower portion of the rear of the upper swing body, and a rear protector 13 is projected out by d from the bonnet 6 at the upper portion of the counterweight. The bonnet 6 can be raised up from the rear. By doing this, the bonnet 6 is not damaged even after contacting to the loading platform of the dump truck 21, and its maintenance work is easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protector for a power shovel, and more particularly to a protector for a bonnet arranged behind a power shovel.

[0002]

2. Description of the Related Art In recent years, it has become very common to carry out earthwork work with a small power shovel in a narrow area of an urban area. Therefore, it is necessary to ensure the safety of the surroundings and protect against damages caused by obstacles around the machine itself. Further, recently, since appearance quality has been emphasized and design and painting have been improved, users have become extremely reluctant to scratch the exterior, and a protector for that has become necessary.

Conventionally, various protectors have been provided at the rear of the upper revolving structure of small power shovels. For example, Japanese Laid-Open Patent Publication No. 5-98674 and Japanese Utility Model Publication No. 6-4955.
No. 4 and Japanese Utility Model Publication No. 7-26448 have been proposed.

6 and 7 are external views of a hydraulic excavator proposed in Japanese Patent Laid-Open No. 5-98674, FIG. 6 is a front view on the rear side, and FIG. 7 is a side view on the right side. An upper revolving structure 32 that is rotatably mounted on a lower traveling structure 31 of the hydraulic excavator 30 is provided with a frame cover 33 that covers an engine and the like at a rear part thereof. The rubber protector 3 is provided at the left and right corners on the rear side of the frame cover 33.
4,34 are attached. Furthermore, frame cover 3
A metal bumper 35 is fixed to the lower portion on the rear side of the metal plate 3.

The protectors 34, 34 are the upper swing body 3
When the 2 rotates, it protects the frame cover 33 when it comes into contact with the surrounding structures, and even if it comes into contact with humans, the rubber protectors 34, 34 mitigate the impact and injure the person. To prevent the occurrence of.

8 and 9 are external views of a hydraulic excavator equipped with the counterweight of the hydraulic excavator proposed in Japanese Utility Model Laid-Open No. 6-49554, FIG. 8 is a left side view, and FIG. 9 is a perspective view of the counterweight. It is a figure. A counterweight 43 is attached to a rear portion of an upper swing body 42 rotatably mounted on a lower traveling body 41 of the hydraulic excavator 40. The counterweight 43 is attached to the left and right ends of the counterweight 43 in front of the front surface of the counterweight 43. A protruding ear-shaped protrusion is formed to protect the engine compartment in front of the counterweight 43. Horizontal band-shaped side protectors 45, 45 are respectively provided in the range extending from the outer surface side of the ear-shaped protrusions formed on the left and right ends of the counterweight 43 to the rear surface side of the counterweight 43. Horizontal strip-shaped projections 46 are formed on the rear surface of the counterweight 43 between 45 to project.

Since the side protector 45 is provided as described above, when the upper revolving structure 42 is rotated to collide the ear-like protrusions of the counterweight 43 with a structure such as a utility pole, a shock absorbing effect is exerted. It is possible to reduce the impact at the time and prevent the adverse effects of the hydraulic shovel on various devices. Further, since the strip-shaped projection 46 is provided on the rear surface of the counterweight 43, it is possible to prevent the end of the side protector 45 from being caught by another obstacle and peeling off. Engine bonnet 4 when servicing the engine
4 is opened.

FIGS. 10 and 11 show actual fairness 7-2644.
It is an external view of the power shovel proposed in Japanese Patent No. 8 publication,
10 is a left side view and FIG. 11 is a plan view. An upper revolving structure 52, which is rotatably mounted on a lower traveling structure 51 of the power shovel 50, covers an engine arranged at the rear with a hood 53 that can be opened and closed, and a counterweight 54 is provided at a rear side and a lower edge of the hood 53. And the first protector 5 also serving as a counterweight on both side edges of the bonnet 53.
5, 55 are provided, and the second protector 56 is provided at the upper edge portion of the bonnet 53 so that the rear portion of the bonnet 53 is surrounded in a frame shape. When the hood 53 is opened, the hood 53 is in a state shown by a thin two-dot chain line.

With the above construction, when the upper revolving structure 52 is rotated, the bonnet 53 can be surely protected when the rear part of the upper revolving structure 52 is brought into contact with the structure or the like. Further, when the bonnet 53 is opened, the upper surface and the side surface of the engine are released, so that maintenance or the like can be easily performed.

[0010]

However, the above configuration has the following problems. (1) In Japanese Patent Laid-Open No. 5-98674, there is a problem that the rear surface of the frame cover is not protected by the protector, so that if the portion comes into contact with the building or the cargo bed of the dump truck, it will be damaged. (2) In Japanese Utility Model Application Laid-Open No. 6-49554, damage is caused when a building or a dump truck bed is contacted above the belt-shaped side protectors 45 in the horizontal direction. The height of the counterweight is equal to the height of the engine compartment. Therefore, only the engine bonnet above the engine compartment is opened, which makes engine maintenance very difficult. (3) In Japanese Utility Model Laid-Open No. 7-26448, the rear portion of the engine bonnet is surrounded by a counterweight and a protector in a frame shape, but the inside portion of the frame is a bonnet and this portion is not protected. Therefore, as shown in FIG. 12, the rear portion of the loading platform 21 of the dump truck 20 or the lower end of the rear portion may directly contact the bonnet, in which case there is a problem that the K portion of the bonnet 53 is damaged.

The present invention has been made in view of the above-mentioned problems. Since the bonnet does not come into contact with the cargo bed of the dump truck, there is no possibility of damage, which may hinder the opening and closing of the bonnet. The purpose of the present invention is to provide a protector for a power shovel that does not impair the maintainability of the engine.

[0012]

In order to achieve the above object, in a protector for a power shovel according to the present invention, an upper swing body having a working machine at a front portion and a bonnet at a rear portion is provided. In a power shovel which is mounted on a lower traveling body so as to be freely rotatable, at a rear portion of the upper revolving body,
A side protector is provided, which protrudes from the bonnet when viewed from the front and side surfaces on the rear side of the vehicle body, and has an upper edge whose height from the ground is a predetermined value or more. Since the left and right sides and / or the rear surface of the bonnet are protected by the protectors as described above, the bonnet can be damaged even if the left and right side surfaces or the rear surface of the rear part of the upper swing body are brought into contact with the lower end of the loading platform of the dump truck. There is no.

Further, in the above, the counterweight is provided below the rear portion of the upper swing body and protruding from the bonnet when viewed from the side of the vehicle body.
Therefore, the bonnet will not be damaged even if the rear part of the upper swing body is brought into contact with the structure or the like.

Further, in the above, a rear protector projecting from the bonnet when viewed from the side of the vehicle body is provided at the rear of the upper swing body and above the counterweight. Therefore, the bonnet will not be damaged even if the rear portion of the upper swing body is brought into contact with the lower end portion of the loading platform such as a structure or a small dump truck.

Further, in the above description, the height of the upper edge from the ground is equal to or more than a predetermined value of the lower end height of the loading platform of the dump truck adapted to each power shovel according to the loading height capability of the power shovel. . Therefore, the bonnet will not be damaged even if the bonnet is brought into contact with the lower end or the like of a loading platform such as a dump truck adapted to each.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a protector for a power shovel according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a left side view of a power shovel equipped with a protector of the present invention. An upper revolving structure 3 is rotatably mounted on a lower traveling structure 2 of the power shovel 1. A working machine 4 is attached to the front of the upper revolving structure 3, a driver's seat 5 is provided in the center, and a hood 6 having an engine and the like installed therein is provided to the rear.

FIG. 2 is a left side view showing details of the bonnet 6 of the power shovel 1, FIG. 3 is a rear side front view, and FIG. 4 is a plan view. On the left and right outer side surfaces of the bonnet 6, side protectors 10,
11 is fixed to the upper swing body 3. The surface of the side protector 10 is a when viewed from the left side view as shown in FIG.
The surface of the side protector 11 also projects from the surface of the bonnet 6 by a when viewed from the right side surface. That is, the side protectors 10 and 11 on both sides project toward the rear side of the vehicle by a from the surface of the bonnet 6. Further, as shown in FIG. 3, the side protectors 10 and 11 on both sides project from the surface of the bonnet 6 by a distance b from the rear side front view. As shown in FIG. 2, the height h of the upper edges of the side protectors 10 and 11 from the ground is set higher than the height H of the lower end of the loading platform 21 of the dump truck 20 from the ground. That is, the height h of the upper edges of the side protectors 10 and 11 is greater than the height H of the lower end of the luggage carrier 61.

In the above description, a dump truck for loading is used in accordance with the loading height of the power shovel. For example, a small dump truck is used for a small power shovel, and a medium dump truck is used for a medium power shovel. Therefore, the height h of the upper edges of the side protectors 10 and 11 is set according to the height H from the ground at the lower end position of the loading platform 21 of the dump truck 20 in accordance with the loading height capability of the power shovel. You can leave it.

A counterweight 12 is fixedly provided at the rear end of the upper swing body 3 and below the side protectors 10 and 11, and the rear end thereof projects from the surface of the bonnet 6 by c as shown in FIG. . At the rear end of the upper swing body 3 (the rear of the hood 6) and the counterweight 1
A rear protector 13 is fixed above the hood 6 so as to project from the surface of the hood 6 by d. Rear protector 1
3 is arranged between both side protectors 10 and 11.

That is, the rear portion of the bonnet 6 is protected by the side protectors 10 and 11, the counterweight 12, and the rear protector 13, and even when the upper revolving structure 3 is rotated, the bonnet 6 is contacted with a structure or the like.
Without damaging the truck, the loading platform 21 of the dump truck 20
The bonnet 6 is protected by the side protectors 10 and 11 and is not damaged even if it contacts the lower end of the. still,
In the present invention, as shown in FIGS.
The counter weight 12 and the counter weight 12 are described as separate embodiments, but the configuration is simplified and the production is facilitated (for example,
From the viewpoint of (integration by casting) etc., the counterweight 1
Of course, the rear protector 13 may be made to project upward like the rear protector 13, and the function of the rear protector 13 may be added to be integrated.

As shown in FIG. 5, the bonnet 6 has an upper surface,
The front end is rotatably attached to the upper revolving structure 3 with a hinge or the like, and as shown by the arrow, the bonnet 6 is not damaged and can be easily opened. That is, since the upper surface and side surfaces of the engine and the like that are internally provided are released, maintenance and the like can be easily performed.

[0023]

Since the protector of the power shovel according to the present invention has the above-described structure, the bonnet is not damaged even if it contacts the structure when the upper swing body is rotated, and the protector of the dump truck is not damaged. There is no risk of damaging the bonnet if it touches the lower edge of the carrier. Further, since the open area when the hood is opened is large, a protector for a power shovel in which maintenance of an engine or the like is easy can be obtained.

[Brief description of drawings]

FIG. 1 is a left side view of a power shovel having a protector according to the present invention.

FIG. 2 is a left side view showing details of a power shovel including the protector of the present invention.

FIG. 3 is a rear-side front view of a power shovel including the protector of the present invention.

FIG. 4 is a plan view of a power shovel equipped with the protector of the present invention.

FIG. 5 is a left side view showing a state when the hood of the present invention is released.

FIG. 6 is a left side view of a first example of a power shovel to which a conventional protector is attached.

FIG. 7 is a rear side front view of a first example of a power shovel to which a conventional protector is attached.

FIG. 8 is a left side view of a second example of a power shovel to which a conventional protector is attached.

FIG. 9 is a perspective view of a second conventional protector.

FIG. 10 is a left side view of a third example of a power shovel to which a conventional protector is attached.

FIG. 11 is a plan view of a third example of a power shovel to which a conventional protector is attached.

FIG. 12 is an explanatory diagram showing a state in which the loading platform of the dump truck contacts the hood of the power shovel of the third example.

[Explanation of symbols]

 3 Upper revolving structure 6 Bonnet 10, 11 Side protector 12 Counter weight 13 Rear protector

Claims (4)

[Claims] 1. A power shovel in which an upper revolving structure having a working machine in the front part and a bonnet in the rear part is rotatably mounted on a lower traveling structure, wherein a rear part of the upper revolving structure is provided behind the vehicle body. A protector for a power shovel, comprising a side protector protruding from the bonnet when viewed from the front side and the side, and having a height of an upper edge from the ground of a predetermined value or more. 2. Below the rear portion of the upper swing body, and
The protector for a power shovel according to claim 1, further comprising a counterweight protruding from the bonnet when viewed from a side surface of the vehicle body. 3. The protector for a power shovel according to claim 1 or 2, further comprising a rear protector projecting from the bonnet when viewed from the side of the vehicle body, at the rear of the upper swing body and above the counterweight. 4. The height of the upper edge from the ground is equal to or more than a predetermined value of the lower end height of the bed of the dump truck adapted to each power shovel according to the loading height capacity of the power shovel. The protector for a power shovel according to claim 1, claim 2 or claim 3.