JP2009127188A - Counterweight of working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely support a structure, supported on a base plate, by increasing the fixing strength of the base plate. <P>SOLUTION: This counterweight 1 of a hydraulic excavator etc. enables the structure such as an antenna to be fixed on the base plates 3A and 3B by fixing the base plates 3A and 3B on a top plate 11 of an outer shell body 10. The counterweight 1 comprises a reinforcing plate 16 which is arranged in the outer shell body 10 and the upper end of which is fixed to the undersurface of each of the base plates 3A and 3B, and a support material 17 which is elongated downward from the reinforcing plate 16 and the lower end 17b of which is fixed to a base plate 12. The reinforcing plate 16 and the support material 17 are integrally provided in the state of being embedded in concrete infilled in the outer shell body 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a counterweight of a work machine such as a hydraulic excavator.

  In general, a working machine such as a hydraulic excavator is provided with an upper swing body on a traveling body such as a crawler, and a counterweight is provided at the rear of the upper swing body. In recent years, a structure such as a satellite antenna for receiving position information of a work machine or a guide rail for safety measures may be attached to the upper plate of the counterweight by welding or bolts (for example, patents). References 1 and 2).

The counterweight 9 shown in FIG. 7 is an example in which a pair of antennas 2 (2A, 2B) are fixed to the upper plate 9c. That is, the counterweight 9 has a structure in which concrete 20 is filled in an outer shell body 9a made of a steel plate having a top plate 9c and a bottom plate 9d that are vertically opposed to each other. The suspension member 9e protruding from the plate 9c has a general structure in which a reinforcing member 9f formed integrally with the bottom plate 9d is connected to the bottom plate 9d. The base plates 3 and 3 are fixed to the upper plate 9c by welding at predetermined positions where the antennas 2A and 2B are fixed, and the antenna 2 is fixed to the base plates 3 and 3 with bolts.
JP 2003-221844 A JP 2003-336293 A

However, the conventional structure for fixing a structure such as an antenna to the counterweight has the following problems.
That is, the base plate is fixed to the upper plate of the counterweight only by welding, or only by bolt fastening as shown in Patent Documents 1 and 2, and the antenna is attached to the end of the long bar member as shown in FIG. When attaching large structures with unstable structures such as the antennas 2A and 2B provided with the main body or guide rails that need to be installed at a position higher than a predetermined height, a large load is applied to the fixed part (base There is a possibility that the fixed portion of the plate 3) may be broken and the structure cannot be reliably supported in a stable state.
Further, as shown in FIG. 7, there is a restriction that the distance between the pair of antennas 2A and 2B is secured with a certain distance or more, and the base plates 3 and 3 are attached to the curved surface portion of the rear upper edge portion 9b of the counterweight 9. If it must be arranged, the base plates 3 and 3 are attached in a cantilever state protruding outward from the upper plate 9c, which is necessary for supporting the structure (antenna 2). There has been a problem that the fixing strength of the base plate against the counterweight cannot be secured sufficiently.

  The present invention has been made in view of the above-described problems. By increasing the fixing strength of the base plate, it is possible to reliably support the structure fixed on the base plate. The purpose is to provide.

  In order to achieve the above object, a counterweight of a working machine according to the present invention comprises an outer shell body having an upper plate and a bottom plate, and a heavy object provided inside the outer shell body, and the base plate is attached to the upper plate. Is a counterweight of a work machine that can fix a structure on the base plate, and is arranged in the outer shell body and extends from the lower surface of the base plate, and its lower end is A support column material fixed to the bottom plate is provided, and at least a part of the support column material passes through the outer shell and is fixed to the base plate.

In the present invention, the base plate is fixed to the bottom plate and supported in a state of being integrally fixed by the support pillar material in which buckling is suppressed, and the support pillar material is a heavy object such as concrete in the outer shell. Since the yield strength is improved by integrating the base plate, the base plate is firmly fixed to the counterweight. Therefore, for example, even when the structure is long and has a heavy object at the tip or a larger and heavy structure, the structure fixed on the base plate can be reliably supported. . And since the load of the structure fixed on the base plate is transmitted to the reinforcing member and the support pillar material through the base plate, and the burden on the base plate can be reduced, Destruction can be prevented.
Furthermore, even when the base plate is in a state of projecting rearward from the upper plate by the structure, for example, the base plate is supported in an integrated state by the support pillars, so that the cantilever The base plate is not fixed in an unstable state with respect to the counterweight, and the structure can be reliably supported in a stable state.

In the counterweight of the working machine according to the present invention, it is preferable that the support column material is fixed to the inner surface of the outer shell.
In the present invention, since the reinforcing member has a structure integrated with the outer shell body, the rigidity of the supporting column material is increased, and the supporting force of the base plate can be improved. The structure is more firmly fixed, and the structure fixed on the base plate can be reliably supported.

In the counterweight of the working machine according to the present invention, it is preferable that the support column member is provided with a reinforcing member at the upper end, and the reinforcing member is fixed to the lower surface of the base plate.
In the present invention, since the base plate is integrally fixed by the reinforcing member provided at the upper end of the support column material, the base plate is firmly fixed to the counterweight, and the base plate is fixed on the base plate. It is possible to reliably support the structure fixed to the frame.

  According to the counterweight of the work machine according to the present invention, the fixing strength of the base plate with respect to the counterweight can be increased regardless of the position of the base plate fixed to the upper plate. A structure with improved proof stress of the base plate is provided, and the structure can be reliably supported, and even a larger and heavy structure can be fixed on the counterweight in a stable state.

Hereinafter, an embodiment of a counterweight of a work machine according to the present invention will be described with reference to FIGS. 1 to 3.
1 is a perspective view showing an entire counterweight according to an embodiment of the present invention, FIG. 2 is a broken perspective view showing an internal structure of the counterweight, and FIG. 3 is an internal structure of the counterweight viewed from a direction different from FIG. FIG.

Reference numeral 1 in FIG. 1 indicates a counterweight according to the present embodiment. The counterweight 1 is mounted on a work machine such as a well-known hydraulic excavator, for example, and is arranged at the rear part of the hydraulic excavator.
In addition, the back side (front side plate 13 described later) of the counterweight 1 shown in FIG. 1 is the front side of the work machine, and the opposite side is the rear side.

  Here, a hydraulic excavator (not shown) on which the counterweight 1 is mounted is a generally known hydraulic excavator, and is a lower traveling body and an upper swing body integrally provided rotatably on the lower traveling body. And a cabin having a work operation chamber provided in the upper swing body, and an engine which is an internal combustion engine housed in the upper swing body. A counterweight 1 is provided at the rear of the upper swing body.

  As shown in FIG. 1, the counterweight 1 includes an outer shell body 10 and concrete 20 (heavy object) filled in the outer shell body 10. On the counterweight 1, a pair of satellite antennas 2 and 2 (structures) for receiving position information of its own hydraulic excavator and the like are arranged in the left-right direction (the longitudinal direction of the counterweight 1 or the work machine). It has a structure that can be fixed via base plates 3 and 3 (described later) at positions spaced apart in the width direction). Here, in this embodiment, as the main antenna 2 (2A, 2B) mounted on the counterweight 1, an antenna having a known structure in which an antenna body is provided at the tip of a long bar member as shown in FIG. Is adopted.

  The outer shell 10 is obtained by processing a steel plate into a substantially hollow box shape, and is arranged on the front side of the upper plate 11, the bottom plate 12 arranged facing the upper plate 11 in the vertical direction, and the front side. The front side plate 13 is fixed to the top plate 11 and the bottom plate 12, and the rear side plate 14 is disposed so as to face the front side plate 13 and gently curves from the rear side to the left and right ends. Yes.

As shown in FIGS. 2 and 3, the upper plate 11 is provided with brackets 15, 15 for hooking a hanging jig embedded in the concrete 20 filled in the outer shell body 10.
A base plate 3 (3A, 3A, 3A, 3A, 3B, 3A, 3B) is formed at a predetermined position on the outer side of the brackets 15 and 15 of the upper plate 11 in the left-right direction. 3B) is fixed by fixing means such as welding.
Here, the base plate on the left side as viewed in FIG. 2 and FIG. 3 is used as the first base plate 3A, and the right side plate is also distinguished from the second base plate 3B. The first base plate 3A is attached in a state where it is entirely mounted on the upper plate 11, and the second base plate 3B is attached in a cantilever state protruding outward (rear side) from the upper plate 11. It has been.

  The counterweight 1 is disposed in the outer shell body 10 and has a reinforcing plate 16 in which an upper end portion 16a is fixed to the lower surfaces of the base plates 3A and 3B, and extends downward from the reinforcing plate 16. And a supporting column member 17 having a lower end 17b fixed to the bottom plate 12. That is, the reinforcing plate 16 is provided with the reinforcing plate 16 at the upper end 17 a of the support pillar 17, and at least a part of the reinforcing plate 16 penetrates the outer shell body 10 and is fixed to the base plate 3. .

  More specifically, the reinforcing plate 16 has a flat plate shape and is disposed with its side face directed in the vertical direction, the upper end portion 16 a on the lower surface of the base plate 3, and the front end portion 16 b on the inner surface of the front side plate 13. It is fixed by fixing means such as welding. Note that the reinforcing plate 16 fixed to the first base plate 3 </ b> A located on the left side as viewed in the drawing is entirely disposed in the outer shell body 10. Similarly, the reinforcing plate 16 fixed to the second base plate 3B located on the right side is partially extended (reference numeral 16c shown in FIG. 1) because the second base plate 3B projects from the upper plate 11 as described above. Is exposed to the outside from the outer shell body 10.

The support column 17 has a long flat plate shape, and the upper end 17 a is fixed to the reinforcing plate 16 and the lower end 17 b is fixed to the bottom plate 12 with the longitudinal direction thereof being directed in the vertical direction.
At least a part of the reinforcing plate 16 and the support column 17 are integrally provided in a state of being embedded in the concrete 20 filled in the outer shell body 10.

Next, the operation of the counterweight 1 to which the antennas 2A and 2B are attached will be described with reference to the drawings.
As shown in FIGS. 1 to 3, in the counterweight 1, each of the base plates 3A and 3B is integrally fixed by a reinforcing plate 16, and the reinforcing plate 16 is also connected to the bottom plate 12 to suppress buckling. Since the reinforcing plate 16 and the supporting pillar material 17 are integrated in the state embedded in the concrete 20 in the outer shell body 10 and the proof stress is improved, the counterweight 1 is supported. In contrast, the base plate 3 is firmly fixed.
Therefore, even if it is a long structure such as the antennas 2A and 2B and a heavy object at the tip, or a larger and heavy structure, the structure is fixed on the base plate 3. An object can be reliably supported.

And since the load of antenna 2A, 2B fixed on the base plate 3 is transmitted to the reinforcement plate 16 and the support pillar material 17 via the base plate 3, the burden which the base plate 3 receives can be reduced. The base plate 3 can be prevented from being broken.
Further, even when the second base plate 3B is in a state of projecting rearward from the upper plate 11, the base plate 3 is supported in an integrated state by the reinforcing plate 16, so that it cantilevered. The base plate 3 is not fixed in an unstable state with respect to the counterweight 1 without being in a beam state, and the antennas 2A and 2B can be reliably supported in a stable state.

  Further, since the reinforcing plate 16 is integrated with the outer shell body 10, the rigidity of the support pillar 17 is increased and the supporting force of the base plate 3 can be improved. The base plate 3 is more firmly fixed, and the antenna 2 fixed on the base plate 3 can be reliably supported.

  Furthermore, since the base plate 3 is integrally fixed by the reinforcing plate 16 provided at the upper end of the support pillar 17, the base plate 3 is firmly fixed to the counterweight 1. The antenna 2 fixed on the base plate 3 can be reliably supported.

  As described above, in the counterweight of the work machine according to the present embodiment, the fixing strength of the base plate 3 with respect to the counterweight 1 can be increased regardless of the position of the base plate 3 fixed to the upper plate 11. The structure of the base plate 3 is improved with respect to the load of the antennas 2A and 2B, and the antennas 2A and 2B can be reliably supported, and even a larger and heavy structure is stable. It can be fixed on the counterweight 1 in a state.

Next, another modification of the above-described embodiment will be described with reference to the accompanying drawings. However, the same or similar members and parts as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. A configuration different from that of the embodiment will be described.
4 is a perspective view showing the entire counterweight according to a modification of the present embodiment, FIG. 5 is a cutaway perspective view showing the internal structure of the counterweight, and FIG. 6 is a cutaway perspective view showing the internal structure of the counterweight. It is a figure corresponding to the figure.

  As shown in FIGS. 4 to 6, the counterweight 1A of the present modification employs a counterweight 1A having a smaller thickness than the counterweight 1 (see FIGS. 1 to 3) of the above-described embodiment. Yes. In the embodiment, the base plates 3A and 3B having a quadrangular shape in plan view are used. However, in this modification, the base plate 4 has a polygonal shape (pentagonal shape in plan view) and has a large protruding amount from the upper plate 11. (4A, 4B) is used. That is, the base plates 4A and 4B have one end portions 4a fixed to the rear upper edge portion 10a (the rear portion of the upper plate 11) of the outer shell body 10 by a fixing means such as welding, and the large size excluding the one end portion 4a. The portion protrudes rearward from the rear upper edge portion 10a.

The base plates 4A and 4B have the reinforcing plates 16 fixed to the lower surfaces of the base plates 4A and 4B, respectively, and the upper ends of the support pillars 17 having the lower ends 17b fixed to the bottom plate 12 in the reinforcing plates 16. 17a is fixed. The reinforcing plate 16 and the supporting column member 17 are formed to have a dimension corresponding to the thickness dimension of the counterweight 1A of this modification.
The reinforcing plate 16 has a front end portion 16b fixed to the inner surface of the front side plate 13, an upper end rear portion 16d shown in FIG. 6 fixed to the lower surface of the base plate 4, and the base plates 4A and 4B as described above. Since it protrudes from the upper plate 11, a part (reference numeral 16 c shown in FIG. 1) is exposed outward from the outer shell body 10.

  As described above, in this modified example, the base plate 4 itself is fixed to a part of the upper plate 11 and the cantilever is unstablely fixed. However, each of the base plates 4A and 4B is The reinforcing plate 16 is integrally fixed, and the reinforcing plate 16 is also connected to the bottom plate 12 and supported by the supporting pillar material 17 in which buckling is suppressed, and at least a part of the reinforcing plate 16 and the supporting pillar material 17 are connected. Since the structure is integrated with the concrete 20 in the outer shell 10 to improve the yield strength, the base plate 4 is firmly fixed to the counterweight 1A. Therefore, the antennas 2A and 2B fixed on the base plate 4 can be reliably supported as in the embodiment.

As mentioned above, although embodiment and the modification of the counterweight of the working machine by this invention were described, this invention is not limited to said embodiment and modification, It changes suitably in the range which does not deviate from the meaning. Is possible.
For example, in the present embodiment and the modification, the upper end 17a of the support pillar 17 is provided with the reinforcing plate 16, and the upper end 16a of the reinforcing plate 16 is fixed to the lower surface of the base plate 3. There is no limitation, and for example, a structure in which the support pillar 17 and the reinforcing plate 16 are integrally formed may be used. Further, the support column member 17 may not be provided with the reinforcing plate 16, and the upper end 17 a of the support column member 17 may be fixed to the lower surface of the base plate 3.
In this embodiment and the modification, the front end portion 16b of the reinforcing plate 16 is fixed to the inner surface of the front side plate 13, but the fixing position of the reinforcing plate 16 with respect to the inner surface of the outer shell body 10 is particularly large. It is never specified. For example, a part of the upper end that is not fixed to the base plates 3 and 4 may be fixed to the inner surface of the upper plate 11 by welding or the like. Further, the reinforcing plate may not be fixed to the inner surface of the outer shell body 10.

The shapes, thickness dimensions, sizes, etc. of the base plates 3 and 4, the reinforcing plate 16, and the support column 17 of the embodiment and the modification are not limited, and the shape of the counterweight and the antenna to be attached It can be arbitrarily set corresponding to the shape of the structure such as, and the constraint condition in the structure. For example, the vertical dimension of the reinforcing plate 16 may be further extended downward to further increase the rigidity of the base plates 3 and 4 fixed to the reinforcing plate 16.
Moreover, in this Embodiment and the modification, although the structure attached to the baseplates 3 and 4 is the antenna 2, it is not limited to this, For example, the circumference | surroundings on an upper revolving body are included as another structure. It is possible to apply a guide rail column or the like for safety measures that is arranged so as to surround and is installed on the counterweight.

It is a perspective view which shows the whole counterweight by embodiment of this invention. It is a fractured perspective view which shows the internal structure of a counterweight. It is a fractured perspective view which shows the internal structure of the counterweight seen from the direction different from FIG. It is a perspective view which shows the whole counterweight by the modification of this Embodiment. It is a fractured perspective view which shows the internal structure of a counterweight. It is a fractured perspective view which shows the internal structure of a counterweight, Comprising: It is a figure corresponding to a figure. It is a perspective view which shows the state which fixed the antenna on the conventional counterweight.

Explanation of symbols

1, 1A Counterweight 2 Antenna (structure)
3, 4 Base plate 10 Outer shell 11 Upper plate 12 Bottom plate 13 Front side plate 16 Reinforcement plate (reinforcement member)
17 Support column material 17a Upper end 17b Lower end 20 Concrete (heavy)

Claims (3)

An outer shell body having a top plate and a bottom plate, and a heavy article provided inside the outer shell body,
A work machine counterweight that allows a base plate to be fixed to the upper plate and a structure to be fixed on the base plate,
The support column is disposed in the outer shell and extends from the lower surface of the base plate, and the lower end thereof is fixed to the bottom plate.
A counterweight for a working machine, wherein at least a part of the support pillar material passes through the outer shell body and is fixed to the base plate.   The counterweight of the work machine according to claim 1, wherein the support column member is fixed to an inner surface of the outer shell body.   The counterweight of the working machine according to claim 1 or 2, wherein the support column member is provided with a reinforcing member at an upper end, and the reinforcing member is fixed to a lower surface of the base plate.

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