JPH0634438Y2 - Counter weight - Google Patents

Description

[Detailed description of the device] [Industrial applications]

 The present invention relates to a counterweight having a three-part configuration.

[Prior art]

Conventionally, a counterweight 1'mounted on a construction machine such as a hydraulic excavator or a forklift is integrally formed by casting or sheet metal working as shown in FIG. In the case of casting, a compact shape can be achieved because it can handle a complicated shape and has a high specific gravity, but the cost increases. Therefore, normally, in order to reduce costs, it is molded with sheet metal,
In addition, a structure filled with concrete that can relatively increase the specific gravity is widely adopted.

[Problems to be solved by the device]

In the conventional configuration, the counterweight has an integrated structure, so if a new design with a complicated shape is to be applied to each model, it is necessary to provide a dedicated mold for each model from small to large. Yes, in the case of a model that produces a small amount, the cost will be greatly increased. This invention was created in view of the above circumstances, and its main problem is to mold only the central block body according to each model, and to make the side block body common, and to have a unified design and size. Different counterweights can be easily formed and the cost can be reduced.

[Means for solving problems]

In order to achieve the above object, the present invention provides (a). A central block body having left and right side surfaces and a peripheral edge having the same shape as all or a part of the peripheral edge of the side surface of the central block body, and a side surface substantially corresponding to the side surface of the central block body is provided on the contact side. And a pair of left and right side blocks, which is divided into three parts, (b). The peripheral edge of the side surface of the central block body and the peripheral edge portion of the side surface of the side block body facing the central block body are extended to the outside and the other side is retracted to the inside, so that there is a gap when connecting the central block body and the side block body. Instead, the technical measures are taken to make the outer surface continuous.

[Action]

Align the side surface of the central block body and the side surface of the side block body, and align the respective peripheral edges with the central block body,
The pair of side block bodies are integrally combined. Thereby, even if the central block body has different lengths in the left-right direction, the same side block body can be continuously connected to the left and right sides of the central block body. Further, since the peripheral edge portion of the side surface of the central block body and the peripheral edge portion of the side surface of the side block body opposite to this are formed by extending one outside and retracting the other inward, the central block body and the side It is possible to make the outer surface continuous without a gap when connecting the rectangular blocks. Therefore, attach the counter weight to the shape of the machine (large or small)
Regardless of the above, the side block body may be common and only the central block body may be individually molded.

【Example】

A preferred embodiment in which the counterweight of the present invention is used in a hydraulic excavator will be described below with reference to the drawings. As shown in FIG. 1, the counterweight 1 is composed of a central block body 2 and a pair of left and right side block bodies 3 and 4 provided on both sides thereof. This central block body 2 and a pair of left and right side block bodies 3, 4
Is a hollow structure made of sheet metal, and the inside hollow is concrete or other filling material having a desired specific gravity.
11 built-in. Here, the central block body 2 has a substantially rectangular parallelepiped shape, a pair of hooks 21 are erected on the upper surface 2A thereof, and the projecting edge portions 22 projecting outward are formed on the peripheral edges of the left and right side surfaces 2B, 2B. Is provided. Further, a chamfered slope 2H is formed at the ridge portion between the rear surface 2D serving as the back surface and the upper surface 2A. Further, as clearly shown in FIG. 2, the bottom surface 2C is provided with a pair of mounting grooves 23 extending to a middle position in the height direction,
A holding member (not shown) protruding rearward is fitted at the rear end of the vehicle side (swing frame), and the counterweight 1 is bolted to the vehicle side. Next, the lateral block bodies 3 and 4 arranged on the left and right sides of the central block body 2 are symmetrically arranged with a substantially right-angled triangular cross-section, and there are two points with acute angles at both ends of the hypotenuse of the cross-section. The corners are chamfered flat surfaces 3F, 3G, 4F, 4G, and the upper surfaces 3A, 4A and the rear surfaces 3D, 4D and the flat surfaces 3F, 3G, 4F, 4G that are oblique sides in the above section. The chamfered slopes 3H and 4H are also provided on the ridge portion of the center line, and can form a surface continuous with the slope 2H of the central block body. Further, the rear surface 3D, 4D and the flat surface 3G, 4G, the storage groove having a substantially U-shaped cross section that extends laterally at a midpoint in the height direction.
It has a complicated shape with 31,41, and the above-mentioned storage groove 3
Storage portions 31A and 41A, which have a U-shaped cross section and into which a storage article 5 such as a lamp is fitted, are formed in the reference numerals 1 and 41, respectively. Since the lamps and other storage items 5 are fitted so that their tips do not protrude from the storage grooves 31, 41, they are protected by the outer peripheral walls of the side block bodies 3, 4 and there is no risk of damage. The side surfaces 3B and 4B of the side block bodies 3 and 4 that are in contact with the central block body 2 have the same peripheral edges as the peripheral edges of the side surfaces 2B and 2B of the central block body 2 described above. In addition, in the present embodiment, a step portion 32 that is recessed inward is formed corresponding to the projecting edge portion 22 of the side surface 2B. Therefore, to the side of the central block body 2, side block bodies 3, 4
As shown in FIG. 4, the central block body 2
And the side block bodies 3 and 4 are arranged through the gap S and are fixed to the mounted portion, and the side surface of the central block body 2 is provided.
The projecting edge portion 22 of 2B is the step portion of the side surface 3B, 4B of the side block body 3, 4.
It is fitted to 32 and covers the outside of the gap S while overlapping. As a result, when the side block bodies 3 and 4 of the central block body 2 are connected as shown in FIG. 3, a continuous outer surface is formed on the outer surface of the counterweight 1 without forming a step. be able to. Here, the concavo-convex structure of the projecting edge portion 22 and the step portion 32 may be reversed. In this embodiment, the structure for fixing the side block bodies 3 and 4 to the vehicle side is not particularly limited. For example, the side block bodies 3 and 4 are fixed to the central block body 2 by bolting or the like to form an integral counterweight 1, and the mounting groove 23 of the central block body 2 is fitted into the holding member of the vehicle and bolted. Alternatively, the side block bodies 3 and 4 and the central block body 2 may be similarly bolted separately to the vehicle-side holding member. Next, a different embodiment will be described with respect to the mounting structure of the counterweight 1 having the above-mentioned three-divided structure on the vehicle side, but the other structures are the same as those of the above-mentioned embodiment, and therefore the description thereof is omitted. In the counterweight 1 shown in FIG. 5, a holding member 6 on the vehicle side is composed of a pair of left and right brackets which are laterally separated from each other at the rear end of the swing frame 7.
The rectangular plate-shaped upper surface 6A has a channel-shaped cross section in which both left and right edges are supported by triangular side stay pieces 6B. The upper surface 6A is provided with bolt holes 8a, 8b which are two steps in the left-right direction and are equidistant in the front-rear direction and which are formed of a plurality of (two in the illustrated example) through holes. Further, the central block body 2 extends to the middle position in the height direction at both corners of the inner side surface 2E thereof, and the upper surface 6A of the holding member 6 is provided.
The coupling receiving portion 9 that engages with the inner half of the is cut out. A blind hole-shaped bolt hole 9a that is aligned with the bolt hole 8a is formed on the bottom surface of the connection receiving portion 9. On the other hand, the side block bodies 3 and 4 are notched with a coupling receiving portion 10 which engages with the outer half of the holding member 6, and is combined with the coupling receiving portion 9 of the central block body 2 to form the holding member 6. It is fitted with almost no gap. A blind hole-shaped bolt hole 10b that is aligned with the bolt hole 8a is formed on the bottom surface of the connection receiving portion 10. Therefore, at the time of assembly, the bolt holes 8a of the holding member 8 are aligned with the bolt holes 9B of the side block bodies 3 and 4 so that they can communicate with each other, and the bolts are tightened. Align the bolt holes 9B and tighten the bolts. As a result, the central block body 2 and the side block bodies 3 and 4 are detachably fastened to the holding members 6 and 6 by bolts so as to be fixed to the vehicle side and at the same time, the assembly of the counterweight 1 is completed. . The counterweight 1 shown in FIG. 6 has a holding member 6 having an upper surface 6A extending in a lateral direction in series on the vehicle side.
Bolt holes 8a and 8b are formed laterally in 6A. On the other hand, the central block body 2 extends to the middle position in the height direction at both corners of the inner side surface 2E thereof and the upper surface of the holding member 6 is formed.
A connection receiving portion 9 is provided, which is a stepped portion formed by drilling the same width as the depth of 6A. A bolt hole 9a corresponding to the bolt hole 8a is formed on the bottom surface of the connection receiving portion 9. On the other hand, the side block bodies 3 and 4 are formed with coupling receiving portions 10 and 10 having a rectangular cross section that engages with the ends of the holding member 6 and extend to the same height as the coupling receiving portion 9 of the central block body 2. Bolt holes 10b corresponding to the bolt holes 8b are formed in the bottom surface. Therefore, the upper surface 6A of the holding member 6 is engaged with the connection receiving portion 9 of the central block body 2 and the connection receiving portions 10 and 10 of the side block bodies 3 and 4, and the bolt holes 6A of the upper surface 6A of the holding member 6A, 6B above connection receiving part
Align the 9 and 10 bolt holes 9a and 10b and tighten them with the bolts inserted from the lower side to tighten the central block body 2 and the side block body.
3 and 4 are separately fixed to the holding member 6, and a series of counterweights 1 can be assembled with this. The counterweight 1 shown in FIG. 7 shows yet another embodiment in which the connection configuration with the holding member 6 is different. In this embodiment, the holding member 6 has a rectangular plate-shaped receiving portion 61 whose upper surface 6A extends further rearward than the structure shown in FIG. A pair of bearing pieces 62 are provided so as to project in a left-right pair. A pair of bolt holes 8a, 8b are vertically formed on the upper surface of the pedestal portion 61 so as to extend inward and outward in the left-right direction.
A bolt hole 8c is formed in the bearing piece 62 so as to extend laterally therethrough. In this case, as the upper surface 6A expands, the central block body 2 is placed on the upper surface 6A with its bottom surface as a flat surface. Therefore, the height of the central block body 2 is set to be short, and the connection receiving portion 9 has a structure. Since it is not necessary to form a part or notch, the shape can be simplified. Further, blind hole-shaped bolt holes 9a that can be aligned with the bolt holes 8a are provided on both left and right sides of the bottom surface 2C of the central block body that serves as the connection receiving portion 9. On the other hand, the connection receiving portion 10 provided on the side block bodies 3 and 4 is
It is formed in an inverted L-shaped cross-section so as to penetrate in the front-rear direction. The bolt hole 8b is formed on the upper surface of the connection receiving portion 10.
Is provided with a blind hole-shaped bolt hole 10b, and side walls 3B, 4B of the side block bodies 3, 4 are provided with a blind hole-shaped bolt hole 10c that can be aligned with the bolt hole 8c. Then, the side block bodies 3 and 4 are supported by the support pieces 6 at both end sides of the cradle 61.
The side surfaces 3B, 4B are abutted with the 2 and the bolt holes 8c and 10c are aligned so that they can communicate with each other, the bolts are inserted from the inside to the outside and tightened, and the central block body 2 is fitted between the pair of bearing pieces 62. It is placed on the pedestal portion 61, aligned with the bolt holes 8a and 9a so that they can communicate with each other, and a bolt is detachably inserted from below to assemble. The counterweight 1 shown in FIG. 8 shows still another embodiment of the holding member 6, and in the case of this embodiment, the holding member 6 is provided.
Has a right-angled triangular side piece 62, 62 standing on both sides of a rectangular plate-like pedestal portion 61 similar to that shown in FIG.
Auxiliary plates 63, 63 that are thinner than the horizontal member 61 and extend in the extension direction are supported on the outer side of 62. The horizontal member 61 is provided with a bolt hole 8a, and the side piece 62 is provided with a bolt hole 8b. Corresponding to this, the central block body 2 has a connection receiving portion 9 structure in which the height is set low, and the bottom side has a bolt hole.
A bolt hole 9a that can be aligned with 8a is provided. Further, the side portions 3B and 4B of the side block bodies 3 and 4 are provided with the step portion 12 corresponding to the side piece 62, and the step portion 13 corresponding to the auxiliary plate 63 is provided on the side block bodies 3 and 4. The connection receiving portion 10 is formed by boring on the bottom surface. In the case of the illustrated example, the bolt hole 10 is formed in the step portion 12 on the side surface side.
b is provided. In this case, the side block bodies 3 and 4 are placed on the auxiliary plate 6 outside the side piece 62, and the bolt holes 8b and 10b are aligned and bolted. The contact side between the auxiliary plate and the bottom surface of the side block body may be bolted. Next, the central block body 2 is placed on the pedestal portion 61 between the pair of side pieces 62, and the bolt holes 8a and 9a are aligned and bolted from below. As a result, the central block body 2 and the side block bodies 3 and 4 can be fixed to the holding member 6, and the counterweight 1 can be assembled. Further, in each of the above-mentioned embodiments, the central block body 2 and the side block bodies 3 and 4 have the fillers contained in the hollows made of sheet metal. For example, the central block body 2 may have fillers having different specific gravities. Thus, even if the outer shapes are the same, the weights can be different. In the above embodiment, the central block body and the side block bodies are all made of sheet metal, but may be cast. Further, it goes without saying that the shapes of the central block body and the side block bodies are not limited to those in the above embodiment. The counterweight may be any one that is used to change the position of the center of gravity of a construction machine or other machine body, and the type and application of the machine (attached portion) that needs to be attached does not matter.

[Effect of device]

In the present invention, the counterweight is a combination of a central block body and a pair of left and right side block bodies so that the outer surface is continuous without a gap, so that the basic shape is the same regardless of the size of the mounted part. The counter weights can be easily combined and continuously molded with no gaps, providing excellent versatility. Therefore, it is possible to mold a unique central block body for each model and use a common side block body, so that the counterweight corresponding to each model can be easily made while keeping the design motif uniform. Can be assembled. As a result, even for counterweights that are produced in small quantities depending on the model, it is possible to achieve a significant cost reduction by only having a model with only the central block body. Further, in the case where the filling material is housed in the inner hollow, even if the filling materials have the same shape, it is sufficient to select substances having different specific gravities and to store them in the filling material. The weight can be molded and has an effect of excellent versatility.

[Brief description of drawings]

FIG. 1 is a side view of a driver's cab showing a preferred embodiment in which the counterweight of the present invention is used in a hydraulic excavator, and FIG. 2 is a perspective view of the counterweight shown in FIG. FIG. 3 is a perspective view of a combination, FIG. 4 is a cross-sectional view showing a connection state of the central block body and the side block body, FIG. 5 is a perspective view showing a connection with a held member, and FIG. Is a perspective view showing a different embodiment of the held member, FIG. 7 is a perspective view showing a further different embodiment of the held member, FIG. 8 is a perspective view showing another embodiment of the held member, and FIG. (A) is a side view of a conventional structure in which a counterweight is mounted on a hydraulic excavator, and (b) is a perspective view of the counterweight. 1 …… Counterweight 2 …… Center block body 3,4 …… Side block body 5 …… Lamp 6 …… Holding member 9 …… Center block connection receiver 10 …… Side block connection receiver 22 …… Projection 32 …… Step

Claims (4)

[Scope of utility model registration request] 1. A central block body having left and right side surfaces, and a side surface having a peripheral edge of the same shape as all or part of the peripheral edge of the side surface of the central block body, the side surface substantially corresponding to the side surface of the central block body. It consists of a left and right pair of side block bodies provided on the abutting side and is divided into three parts, and one of the peripheral edge portion of the side surface of the central block body and the peripheral edge portion of the side surface of the side block body opposite thereto is A counterweight, which extends outward and retracts the other inward so that the outer surface is continuous without a gap when the central block body and the lateral block body are connected. 2. The counterweight according to claim 1, wherein the central block body and the side block body are made of sheet metal and have a filling material housed in the hollow interior. 3. A storage groove extending laterally is provided at an intermediate position in the height direction of the outer surface of the side block body so that a lamp or other storage item can be fitted therein. Counterweight. 4. The counterweight according to claim 1, wherein connection receiving portions for bolting to the counterweight holding member are formed on inner bottom surfaces of the central block body and the side block bodies.