JPH08134957A - Counterweight for construction machine - Google Patents

Abstract

PURPOSE: To increase or decrease weight of a counterweight for construction machine freely, prevent damage to road during transportation, and improve operability by providing a water supply hole which can be opened or closed in an upper section to make the inside of the counterweight hollow and pouring liquid into the counterweight main body in such a manner that liquid flows in and out freely. CONSTITUTION: A bolt is fixed on a locking rod, and a cap 20 of a water supply hole 18 is opened to supply water and the cap 20 is closed for the work. Then, when the work is completed and a construction machine is transported, a water drain hole is opened or water is drained through the water supply hole 18 by using a water drain pump. In this case, water is drained from a hollow section 14 to reduce weight of a counterweight 12 for transportation. Consequently, it is possible to increase or decrease weight of the counterweight 12 freely and operate the construction machine while the counterweight is heavy during the work and reduce its weight when the construction machine is transported.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterweight for a construction machine, in which the weight can be freely increased or decreased and the construction machine can be easily transported.

[0002]

2. Description of the Related Art Conventionally, a counterweight attached to the rear part of a construction machine such as a hydraulic power shovel is a lump of iron, and the weight is about 20% of the construction machine as standard.
Usually, it was about 1 ton. As shown in FIG. 4, insertion holes 4 and 4 are formed in the lower portion of the iron counterweight 2, and screw holes 4a and 4a are opened in the lower wall of the insertion holes 4 and 4. A construction rod such as a locking rod R projecting from the rear end of the hydraulic power shovel P in the insertion holes 4 and 4.
(FIG. 3), the screw hole N (FIG. 3) formed on the lower surface of the locking rod R is aligned with the screw hole 4a, and the bolt B is inserted into the screw hole 4a and the screw hole N. By being screwed, the iron counterweight 2 is detachably locked to the hydraulic power shovel P. For example, when performing work such as digging up soil with a hydraulic power shovel, if the counterweight is not attached, the power shovel will fall forward due to loss of balance when digging soil. In this way, it was necessary to attach a counterweight to a large construction machine in order to maintain balance.

On the other hand, when transporting a construction machine such as a hydraulic power shovel to a work site, the power shovel has a main body weight of about 10 tons and a counterweight of about 3 tons, and it is necessary to transport a total weight of about 13 tons by a truck. There is. For this reason, the truck must be transported by a 15-ton truck, and when passing through a narrow road, it cannot be passed because the small turn is not effective and it is difficult to transport.

Another problem is that when a heavy-duty truck passes through the paved road, the pavement is damaged accordingly.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the weight can be freely increased or decreased, and the same weight as a conventional iron counterweight can be used during the operation of a construction machine. The counterweight for construction machinery is easy to operate, has a light weight during transportation and is convenient for transportation, does not damage the road etc. when transporting construction machinery, and has a simple structure and is easy to handle. It is intended to provide.

[0006]

In order to solve the above problems, a counterweight for a construction machine of the present invention is a counterweight body detachably attached to a construction machine and having a hollow inside, and the counterweight body. It is characterized in that it is composed of a liquid that can be poured in and out freely.

By providing an openable / closable water supply hole in the upper portion of the counterweight body, it becomes easy for liquid to enter and leave the hollow portion of the counterweight body.

The liquid is not particularly limited as long as it is a fluid, but water is most preferable because it is easy to handle.

In the counterweight of the present invention, during the operation of the construction machine, liquid is injected into the main body of the counterweight, and the weighted liquid-filled counterweight is fixed to the balance position of the construction machine to fix the weight of the construction machine. It acts as a balance weight, and when transporting the construction machine, the liquid of the counterweight can be discharged and can be transported as the lightweight hollow counterweight, so that there is no hindrance to the work of the construction machine, Has the advantage that it is much easier to transport than in the past.

The construction machine is not particularly limited as long as it is necessary to attach a counter weight, and a hydraulic power shovel or a forklift can be used.

[0011]

The counterweight for construction machine of the present invention is made heavy or light according to the purpose. That is,
While working on the construction machine, inject liquid, such as water, to increase the weight and use it like a conventional counterweight, and while transporting the construction machine, discharge the liquid inside, such as water, to the outside. It can be made lighter and more convenient for transportation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of a construction machine counterweight according to the present invention, FIG. 2 is a side view of a hydraulic power shovel to which the counterweight of the present invention is attached, and FIG. 4 is a perspective view showing an example of a conventional iron counterweight.

In the figure, reference numeral 12 is a counterweight for a construction machine such as a power shovel. The counterweight 12 is composed of a counterweight body 16 having a hollow portion 14 capable of storing a liquid such as water therein. In order to supply the liquid W such as water to the hollow portion 14, a water supply hole 18 is provided at an appropriate position on the upper surface of the counterweight body 16. The water supply hole 18 can be opened and closed by attaching and detaching a cap 20. In order to discharge the liquid W such as water supplied to the hollow portion 14, a drainage hole (not shown) may be provided at an appropriate position under the counterweight body 16.

Reference numeral 22 is an insertion hole provided in the lower portion of the counterweight 12, and screw holes 22a, 22a are opened in the lower walls of the insertion holes 22, 22. Similar to the conventional counterweight 2 shown in FIG. 4, a construction machine, for example, a locking rod R provided at the rear end of the hydraulic power shovel P is inserted into the insertion holes 22 and 22 (FIG. 3). ,
The screw hole N (FIG. 3) formed on the lower surface of the locking rod R is aligned with the screw hole 22a, and the bolt B is screwed into the screw hole 22.
The counter weight 22 is detachably fixed to the hydraulic power shovel P by being inserted through a and the screw hole N and screwed. The material of the counterweight of the present invention is not limited, but a metal plate such as plastic, aluminum or stainless steel can be used.

With the above configuration, the hydraulic power shovel P
When working with, the counterweight 12 is fixed to the locking rod R at the rear end of the hydraulic power shovel P by a bolt B, and then the cap 20 of the water supply hole 18 is opened to supply water, and the tank is filled up. When it becomes, close the cap 20. In this state, the counterweight 12 acts as a counterweight having a weight of 1 to 3 ton like a conventional iron counterweight, so that the work of the hydraulic power shovel P is not hindered.

When the work of the hydraulic power shovel P is completed and the hydraulic power shovel P is transported, if a drain hole (not shown) is provided, this drain hole is opened and the hollow portion of the counterweight 12 is opened. The water in 14 is discharged outside. At this time, a drainage pump may be used. When the drainage hole is not installed, the water can be drained from the water supply hole 18 using a drainage pump.

By discharging the water from the hollow portion 14 in this manner, the weight of the counterweight 12 is reduced and the construction machine can be conveniently transported. For example, when the main body weight of the hydraulic power shovel P is 10 tons and the counterweight is 3 tons, the total amount has conventionally been 13 tons, and it has been necessary to carry it by using a 15-ton truck.

However, the counterweight 12 of the present invention
If the counterweight is used, the weight of the counterweight drained from the hollow portion 14 is small, and there is a great advantage that it can be transported by using a 10-ton truck to transport only 10 tons of the weight of the hydraulic excavator P. . 10
Since the ton truck has a narrow turn, it can pass through a narrow road, which significantly reduces the work load.

In the above embodiments, the hydraulic power shovel P was used as the construction machine, but it can also be used as a counterweight for a forklift.

[0021]

As described above, the construction machine counterweight according to the present invention can freely increase or decrease the weight, and during construction work, it operates with the same weight as the conventional iron counterweight. The present invention has an effect that it is light in weight during transportation, convenient for transportation, less likely to damage the road during transportation, has a simple structure, and is convenient to handle.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a construction machine counterweight according to the present invention.

FIG. 2 is a side view of a hydraulic power shovel to which the counterweight of the present invention is attached.

FIG. 3 is an enlarged explanatory view of a main part of FIG.

FIG. 4 is a perspective view showing an example of a conventional iron counterweight.

[Explanation of symbols]

 2 Counterweight 4 Insertion hole 4a Screw hole 12 Counterweight 14 Hollow part 16 Counterweight body 18 Water supply hole 20 Cap 22 Insertion hole 22a Screw hole P Power shovel (Construction machine) R Locking rod B Bolt N Screw hole

Claims (5)

[Claims] 1. A counter for a construction machine, comprising: a counterweight body detachably attached to a construction machine and having a hollow interior; and a liquid that can be poured into and out of the counterweight body. weight. 2. The counterweight for a construction machine according to claim 1, wherein a water supply hole that can be opened and closed is provided in an upper portion of the counterweight main body. 3. The construction machine counterweight according to claim 1, wherein the liquid is water. 4. During operation of a construction machine, a liquid is injected into the counterweight body, and the weighted liquid-filled counterweight is fixed to a balance position of the construction machine to act as a balance weight of the construction machine. The construction machine according to any one of claims 1 to 3, wherein when transporting the construction machine, the liquid of the counterweight is discharged to be transported as the lightweight counterweight. Counter weights. 5. The counterweight for a construction machine according to claim 4, wherein the construction machine is a hydraulic power shovel or a forklift.