JP2546949Y2 - Construction vehicle counterweight - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a construction vehicle, in particular, a normal hydraulic excavator equipped with a counterweight having a weight capable of balancing the body in bucket work. The present invention relates to a counterweight for a construction vehicle capable of easily coping with the case where the vehicle is in a state of being operated.

[0002]

2. Description of the Related Art As shown in FIG. 6, an ordinary hydraulic excavator is provided with an upper revolving structure b mounted on a lower traveling structure a, and a driving cab c, an engine, hydraulic equipment and the like are mounted on the upper revolving structure b. , A work implement e having a bucket mounted at the front, and a counterweight W for stabilizing the vehicle body at the rear. As shown in FIG. 7, an example of the counterweight W is formed by partially bending a steel plate and forming the frame f by welding or the like, or by integrally forming the frame f by press working and the like. It is manufactured by filling a heavy object such as concrete or slag from an injection port g formed in the upper surface of f.

A hydraulic excavator equipped with the above-mentioned counterweight W excavates and loads earth and sand with a bucket while traveling and turning. The counterweight W for balancing the vehicle body at the time of work is adjusted to an appropriate weight. Is set.
However, work tools such as breakers, crushers, etc. are often mounted in place of buckets in accordance with work that accompanies diversification of work recently. It becomes unstable. In order to solve such a problem, an auxiliary counterweight is additionally mounted or newly manufactured.

However, even if an auxiliary counterweight is additionally mounted for weight adjustment, it is not structured to be additionally mounted on the upper revolving unit, and if it is easily mounted, it will be accidentally dropped due to vibration, impact, or the like. At the same time, there is a danger of causing a human disaster, and at the same time, the appearance quality is impaired. In the case of new production, especially in the case of press-integrated molding, a new press die must be prepared, and the counterweight is large, so the production cost is high, which is a factor that increases the cost. Not.

The present invention has been made for the purpose of remedying the above-mentioned problems, and is to produce counterweights having different weights by using a common frame integrally formed with the same press die.
An object of the present invention is to provide a counterweight of a construction vehicle in which a body balance can be obtained even when various work machines and attachments are mounted.

[0006]

According to the present invention, in order to achieve the above object, a frame having an open front is integrally formed with the same press die, and a front plate for closing a front opening of these common frames is provided. The counterweights having different weights are constituted by changing the filling volume of the heavy object by changing the attachment position of the counterweight.

[0007]

As described above, a frame body having the same shape and dimensions is integrally formed with the same press die to be common, and a bucket is mounted with the front plate closing the front opening of the common frame body as a working tool. Hydraulic excavator with hydraulic excavator attached to the inner position of the frame set to the filling volume of heavy objects so that it becomes a counterweight of the weight that can obtain the body balance of the hydraulic excavator, and a special work tool is attached In the machine, this can be easily achieved by increasing the filling volume by attaching to the front end of the frame so as to obtain a heavy counterweight corresponding to the work tool.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows a common frame 1 integrally formed by the same press die, and the frame 1 has an upper surface 2, a lower surface 3,
It is composed of both side portions 4 and 5 and a curved rear surface portion 6,
The front part 7 is formed in an open boat shape. The upper and lower surfaces 2 and 3 are formed with notch stepped portions 8 at the front end positions of the side surfaces 4 and 5, and further provided with protruding pieces 9 and 10 extending forward. A hollow frame 1 having a different volume is completed by attaching a front plate at a different position to the front opening 7 as described later, and heavy objects such as concrete and slag are contained in the frame 1. Counterweights having different weights are formed while being filled and forming a common frame 1. In addition, assuming that one of the counterweights having different weights described below with reference to FIGS. 2 to 5 is to be mounted on a hydraulic excavator for normal bucket work, this is referred to as a standard counterweight in order to be distinguished in this embodiment. The other counterweight with a heavier weight is called a high weight counterweight.

[0009] FIG. 2 shows a standard counterweight W _1,
The counterweight W ₁ is an engine mounted on the upper swing structure 12, the radiator, and adjacent to the rear of the outer cover 13 of the hydraulic equipment is mounted, the outer door 14 for internal inspection on both side surfaces of the outer cover 13 Is provided. The frame ₁ of the standard counterweight W1 thus mounted is shown in FIG. 1, and the upper surface 2 of the frame 1 is the outer cover 1
3, and the left and right stepped portions 8, 8 of the projecting piece 9 of the upper surface 2 are fitted between the rear portions 14a, 14a of the exterior doors 14, 14, on both sides. Have been combined. A front plate 11 for closing the front opening 7 of the frame 1 is attached to the front end positions of the left and right side portions 4, 4, and a hollow frame defined by the closing by the front plate 11. weight is calculated from the specific gravity of the volume and the filling weight of the 1 is set in a weight that is set as the standard counterweight W _1. The divided frame 1 is filled with a heavy object 16 from an inlet 15 provided on the upper surface portion 2 and a predetermined standard counterweight W _1.
Is configured.

Next, FIG. 3 shows a high-weight counterweight W _2.
Are shown, the counterweight W ₂ of the frame 1 is the exterior cover 13 from the frame 1 shown in FIG. 1 the same as the standard counterweight W ₁ is commonly used, the mounting relationship with the outer door 14 and the like There is no change. In the same frame 1, the front plate 18 that closes the front opening 7 includes upper and lower surfaces 2.
3 are attached to the front ends of the protruding pieces 9 and 10 and L-shaped side plates 19 and 19 as shown in FIG. The upper and lower ends are attached to the upper and lower surfaces 2, 3 and the vertical edges are attached to the front edges of the front plate 18 and the side surfaces 4, 5 by welding or the like. The L-shaped side plates 19, 19 may be made of an angle material, or may be formed by joining the plate materials in an angle shape by welding or the like. In this manner, the front plate 18 is attached to the front ends of the projecting pieces 9, 10 extending to the upper and lower surfaces 2, 3, and is partitioned so that the volume of the frame ₁ is larger than the standard counterweight W1 described above. The filling amount increases, and the volume comparison between these two counterweights W ₁ and W ₂ is as shown in FIG. The enlarged frame 1 is filled with a heavy object to form a high weight counterweight.

[0011] Hydraulic standard counterweight W _1, and a heavy counterweight W ₂ formed by the same frame 1, which is common as described above is already standard counterweight W ₁ is mounted as a bucket working When a special work tool is attached to the excavator instead of the bucket, the ready-made standard counterweight W
₁ to the frame 1 of the heavy counterweight W ₂ shown in FIG. 3
The standard counterweight W is filled by filling the hollow frame portion formed by additional construction in the manner of
₁ can be easily changed to heavy counterweight W _2.

[0012]

[Effects of the Invention] Since the present invention is configured as described above, counterweights having different weights can be made common by using the same press die to form a frame, so that counterweights that can be used for increasingly various tasks can be manufactured in the future. Made from
Storage is simplified, which can significantly reduce production costs. Moreover, the appearance of the installed hydraulic excavator is the same as that of the standard counterweight and the high-weight counterweight. Does not impair.

Further, even after the standard counterweight is mounted, the weight can be easily changed to a high-weight counterweight as required, and the mounting space and improvement for the counterweight are not required.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a counterweight frame according to the present invention.

FIG. 2 is a perspective view of the standard counterweight according to the present invention.

FIG. 3 is a perspective view of the high-weight counterweight according to the present invention.

FIG. 4 is a perspective view showing members for forming a frame of the high-weight counterweight shown in FIG. 4;

FIG. 5A is an explanatory diagram showing a state in which a standard counterweight is filled with heavy objects, and FIG. 5B is an explanatory diagram showing a state in which a heavy counterweight is filled with heavy objects.

FIG. 6 is a schematic side view of a hydraulic excavator.

FIG. 7 is a perspective view showing an example of a conventional counterweight.

[Explanation of symbols]

1 frame 2 upper surface portion 3 lower surface portions 4 and 5 after the side surface portion 6 face 8 stepped portions 9 and 10 protruding parts 11 and 18 the front plate 12 the upper slewing body 13 exterior cover 14 exterior door W ₁ standard counterweight W ₂ High Weight counterweight 16 Heavy load 19 L-shaped side plate

Claims (4)

(57) [Scope of request for utility model registration] 1. A frame body having an open front surface is formed in common by the same press die, and a filling volume of a heavy object is changed by changing an attachment position of a front plate for closing the front opening portion so that the weight differs. A counterweight for a construction vehicle, wherein the counterweight is constructed as described above. 2. A counterweight for a construction vehicle according to claim 1, wherein upper and lower surfaces forming said frame are provided with projecting pieces extending forward from side surfaces. 3. A counterweight having a different weight is formed by attaching a front plate for closing the front opening of the frame at a front end position of a side surface portion and attaching it to a front end position of a protruding piece portion of an upper and lower surface portion. 3. A counterweight for a construction vehicle according to claim 2, wherein 4. An existing counterweight in which a front plate closing a front opening of the frame is attached to a front end position of a side portion, a front plate is additionally provided at a front end of a vertically projecting piece of the frame. 4. The counterweight of a construction vehicle according to claim 3, wherein the additional weight is attached to the attached frame body, and the additional weight is changed into a counterweight having a larger weight.