JP3459589B2 - Counter weight - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine such as a hydraulic shovel, a self-loader, a bulldozer, a wheel loader, and a crawler-type loader, an agricultural machine, a working machine, etc. (Hereinafter simply referred to as a construction machine). 2. Description of the Related Art Among construction machines, agricultural machines, working machines and the like, the construction machines such as a hydraulic shovel, a self-loader, a bulldozer, a wheel loader, and a crawler-type loader are well known in mountainous areas. It is used for excavating rocks such as dams, tunnels, rivers, and roads, and destroying buildings and buildings. [0003] The structure of the construction machine is, for example, a hydraulic excavator, as shown in FIGS.
And an upper revolving unit 2 rotatably disposed above the lower traveling unit 1 and a working device 4 provided on the upper revolving unit 2 for performing various operations. The upper revolving unit 2 includes an engine 6, a hydraulic device, a revolving unit, an operator room 10, etc., in addition to the working device 4, and a side cover 2sc that covers the outer peripheral side of the upper revolving unit 2.
The upper slewing body 2 includes an upper cover 2uc that covers an outer periphery of the upper slewing body 2, an engine hood 12, and the like. [0004] The lower traveling body 1, a car body (not shown), the track roller frame is constituted by a traveling device and undercarriage apparatus further working mechanism 4 supports the bucket 15 as shown in FIG. 5 boom, arm and various hydraulic cylinders for actuating it, is composed of a link rod is configured and above the turning device, the traveling device or the like. Further, an engine 6 having a hydraulic pump 16 connected to the front side of the counter weight 14 is disposed horizontally between a counter weight 14 provided at a rear portion of the hydraulic excavator and the operator room 10. A radiator 18 and an oil cooler 22 are provided on the front side of the engine 6, and an engine 6 for cooling the radiator 18 and the oil cooler 22, a driving means 1 of one of a hydraulic motor and an electric motor
The cooling fan 20 driven by the engine 9 is connected, and is driven by the engine 6 in this embodiment. [0006] The counterweight 14 is provided to balance, for example, the weight and working force with which the working device 4 of the hydraulic shovel is suspended and the weight distribution of the vehicle. In the case of a small turning machine, the distance from the turning center 21 of the upper turning body 2 to the rear end portion becomes short. Weight balance is lost. On the other hand, the counterweight 14 is classified into a press type and a casting type. The weight of the press type counterweight 14 is lighter than that of the casting type counterweight. That is, the press-type counterweight 14 is covered with a bag-like sheet constituting the shape of the press-type counterweight 14, and is filled with iron sand, iron swarf, and ready-mixed concrete (or mortar) and solidified to form a skeleton. The press-formed counterweight 14 can be made to have a specific gravity of 5 to 6 because the formed and pressed metal sheet is attached to the back of the skeleton by welding. However, when making a heavier counterweight with the above materials having specific gravities of 5 to 6 (iron sand, scrap iron, and ready-mixed concrete), a counterweight having an increased overall volume must be made. For example, a normal type, a press type counterweight having the same volume of 3.5 to 4 tons, a cast type counterweight having a weight of 6 to 6.5 tons can be produced. However, in the case of the casting type counterweight 14 described above, since the casting has a specific gravity of 7 to 7.1, the counterweight 14 can be made small and heavy. The cost is, for example, about two to three times as large as that of the press-type counter weight 14, and is relatively expensive. [0010] Further, since the casting surface is used as a well-known state with the mold removed, and becomes a rough surface, the luster of the left and right side covers 2sc of the above-mentioned hydraulic shovel usually made of sheet metal is different, and the entire hydraulic shovel becomes uncomfortable. The design wasn't good either. Also, in the case of the above-mentioned cast-type counterweight 14, since the appearance of the counterweight 14 differs depending on the type of the hydraulic excavator, such as a large, medium, small or micro-swirl machine, it is necessary to make a new mold each time. However, there is a disadvantage in that an expensive manufacturing cost of the mold is required. [0011] The present invention provides a counter mounted on a construction machine.
Each divided into multiple along the vertical direction of the Tawait
Design block made of steel slab material
The counter weight is cut out into a shape that is set to form a skeleton of the counterweight, and the outer surface of at least a part of the skeleton is made of a coating material made of at least one of a metal, a resin, and a composite of a metal and a resin. An object of the present invention is to provide a small, heavy-weight, inexpensive counterweight and a method of manufacturing the counterweight, which are flexible and versatile at the time of production by forming the counterweight by covering with a cover plate. According to the present invention, a counter weight according to the present invention is divided into a plurality of pieces along the vertical direction of a counter weight mounted on a construction machine. A skeleton of the counterweight, which is formed by cutting a block from a steel slab material into a shape set according to design specifications, stacking the cut-out divided blocks in the vertical direction, and connecting the divided blocks by a connecting means; a filling material supplied between the coating material and the skeleton covering the outer surface of the coating material, said mosquitoes are divided into the plurality
First block disposed at the lower end of the counterweight
And a second unit disposed and coupled to the upper part of the first block.
The rear end of the swing frame of the above construction machine by the block
Can be inserted and removed with the above counter weight.
And a recess provided, wherein the construction machine is disposed in the recess.
The rear end of the swing frame is attached to the second block.
And are configured to support the counterweight.
It is characterized by having been. An embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG. Note that description will be made with reference to FIGS. 5 and 6 as necessary. 1A and 1B are schematic explanatory views showing one embodiment of the present invention, in which FIG. 1A is a schematic plan view of a counterweight, FIG. 1B is a schematic front view of FIG.
Is a schematic explanatory view showing a cross section along line 2A─2A in FIG. 1 (B), FIG. 3 is a schematic plan view showing a slab material serving as a base material of a skeleton of a counterweight, and FIGS. FIG. 4 is a schematic plan view schematically showing first to fourth-stage slab die-cut products cut from the slab material of FIG. 3. As shown in FIGS. 1 to 3, the skeleton of the counter weight 14 in the present embodiment is a heavy block, but in the present embodiment, a plurality of metal blocks 30, that is, a first block 31. . The second block 32, the third block 33, and the fourth block 34 are vertically overlapped, and the contact surfaces of the first to fourth blocks 31 to 34 shown in FIG. , 36c and the like are connected by welding to form the skeleton 40 of the counterweight 14. Further, the coupling means 36 is not limited to the above-mentioned welding, but may be one that is fastened by screwing with bolts or the like. As shown in FIG. 3, the skeleton 40 of the counterweight 14 is cut out from a cubic steel slab material S having a substantially rectangular cross section from a steel mill into a shape set according to design specifications. , FIG.
As shown in (D), the first slab cut product (first block) 31, the second slab cut product (second block) 3
2, 3rd slab cut product (3rd block) 33, 4th
A slab cut product (fourth block) 34 is made, and arrow Y
After superimposing in the order of 1, Y2, and Y3, the first to fourth slab-shaped cut products are joined by welding, which is one of the joining means 36, as described above, and the skeleton 40 of the counterweight 14 is joined.
Is formed. In this embodiment, the outer surface of at least a portion of the skeleton 40 and the back side 42 of the count weight 14 (the rear side of the construction machine) are formed of metal, resin, or a composite of metal and resin. It is covered with a covering plate 37 made of a covering material composed of at least one, and FIG.
As shown in (B), a plurality of portions 38a to 38 at which the upper portion of the fourth block 34 and the upper edge of the cover plate 37 abut.
1A is joined by welding as shown in FIG. 1A, and a plurality of portions 39a to 39e where the lower part of the first block 31 and the lower edge of the cover plate 37 are in contact with each other by welding as described above. The counter weight 14 is constituted at least. The lower end of the cover plate 37 is connected to the lower end of the cover plate 37 as shown in FIG.
(B), as shown in FIG. 2, the first glock 31 is welded at the lower end portions 39 a to 39 e at the rear lower end, but this connection is not limited to this. That is, as the upper part of the cover plate 37 is bent and covered along the rear peripheral edge of the upper surface of the first block 34 of the skeleton 40 and is welded at the portions 38a to 38e, the lower end of the cover plate 37 is also shown in FIG. As shown by a two-dot chain line, the lower surface of the first glock 31 is bent and covered along the rear peripheral edge, and
The overlapping portion of the lower surface of the block 31 and the peripheral portion of the bent cover plate 37 may be joined by welding 39a to 39e. The above-mentioned connecting means 36 is not limited to the welding of the above-described embodiment.
A boss having a screw hole may be embedded in a required portion of the bracket and the cover plate 37 provided on the skeleton 40, or a bolt hole, an embedded bolt, or the like may be provided and fastened with a bolt and a nut. If the cover plate 37 is made of a metal or the above-mentioned composite material, it is pressed. If the cover plate 37 is made of a resin, the cover plate is formed by blow molding or the like.
Since it can be formed so as to conform to the appearance design of the left and right side covers 2sc and the top cover 2uc of the construction machine shown in (B), the appearance design of the counterweight 14 as well as the appearance design of the entire construction machine is improved. be able to. Further, the gap 47 between the skeleton 40 and the cover plate 37 is filled with mortar, iron sand, concrete containing iron scraps, or the like to adjust the weight of the entire counterweight 14 and to reinforce the cover plate 37. The counter weight 14 performs at least one of them. The left and right ends 37a, 37b of the cover plate 37 are shown in FIG.
As shown in the figure, the counterweight 14 is folded back so as to cover the front sides 44 at both left and right ends of the skeleton 40, and if necessary, the above-mentioned connecting means 3 such as welding and bolts are attached to the skeleton side.
6, in the present embodiment, they are connected by welding. Further, the recesses 35a, 35b provided on the left and right of the center of the first block 31 shown in FIG.
The swing frames 25a, 25b of the upper swing body 2 of the hydraulic excavator shown by two-dot chain lines in FIG. 6 are configured to enter the swing frames 25a, 25b.
Then, the lower surface of the second block 32 of the counter weight 14 is fastened with bolts 45 or the like, and
4 is mounted on the upper swing body 2. The above-described framework 40 has been described in connection with a case where a substantially rectangular parallelepiped steel slab material S is vertically divided into four stages of first to fourth blocks, and these are combined and polymerized to be joined. The present invention is not limited to this.
Is further divided from the above embodiment, for example, divided blocks such as a corner divided block, a curved surface divided block, a rectangular parallelepiped divided block, and a concave divided block having a concave portion are prepared and set according to design specifications. In order to form the skeletons 40 of various shapes and sizes to be formed, the divided blocks are combined left and right, front and rear, up and down, and connected by the connecting means 36.
Since there is no need to make a mold, it can be made quickly and inexpensively. The divided block is formed of the slab material S
May be further divided, or a concrete block to which sand iron, scrap iron or the like, which is a material of the press type counterweight, may be added, or a plurality of types of the above divided blocks may be formed by a plurality of types of molds. You may comprise. Furthermore, if the divided block uses heavy waste such as a battery mounted on an automobile, a working machine, or the like as the above-described divided block of the present embodiment, and is attached and disposed via an appropriate known bracket or the like, It is inexpensive and can be recycled and reused. Further, a tank made of, for example, a resin of various shapes and sizes as described above is formed in the above-mentioned divided block, and water or a critical aqueous solution of a high molecular compound such as a polysaccharide or a protein is stored in the resin tank. If at least one of them is filled with the aqueous solution having a specific gravity of about 2 to 3, it can be used for a working machine or the like which does not require much weight. Action and effect can be obtained. The critical aqueous solution of the above-mentioned polymer compound may be corroded or cause an undesirable chemical change. In such a case, if necessary, a preservative according to the components of the aqueous solution may be used. It is preferable to use it after adding an agent or the like. The cover plate 37 may be thick, but if the press-worked plate is used by increasing the strength by polymerizing a plurality of sheets, it may not be necessary to reinforce or fill with the mortar or concrete. In the case where a plurality of sheets are superimposed as described above, the outermost covering plate 37 is damaged or deformed by replacing the covering plate 37 disposed second or later with the outermost when the outermost covering plate 37 is damaged or deformed. Thus, the appearance design of the counterweight 14 can be quickly repaired. [0033] As has been described above in detail, according to the Kauntau E wells of the present invention described in claim 1, is divided into a plurality along the vertical direction of the counterweight mounted on a construction machine Each of the divided blocks is cut out of a steel slab material into a shape set according to design specifications, and the cut-out divided blocks are stacked in the up-down direction and joined by joining means, and the skeleton of the counterweight is configured. When,
A filling material supplied between the coating material and the skeleton covering the outer surface of the skeleton and the covering member, said split into the plurality
The first block located at the lower end of the counterweight
And the second block disposed and connected to the top of the first block.
After the construction machine swing frame by two blocks
The above counterweight configured to allow insertion and removal of the end
And a recess provided in the recess, the construction machine being disposed in the recess.
The rear end of the swing frame of the machine is in the second block
Attached and configured to support the canta weight
Therefore, a counterweight having a size and a shape as required can be easily and simply manufactured at a low cost, and the degree of freedom in manufacturing is improved. Further, the counterweight which is small and heavy can be manufactured, and the cost can be reduced by using the slab material.
Further, the plurality of metal blocks can be cut out and formed while indicating a shape set according to design specifications, and a desired shape can be appropriately formed. In addition, the above-described blocks can be appropriately combined to form the above-described skeleton having a desired shape. Further, at least one of reinforcement of the cover plate and adjustment of the weight of the counterweight can be performed by the filler. Further, it is possible to make the counterweight with weight small, Ru can reduce costs With the slabstock. Further, it is easy to configure so that the swing frame of the upper swing body of the hydraulic shovel enters the concave portion provided between the first block and the second block. The lower surface of the second block of the counterweight is fastened by bolts or the like, and the counterweight can be mounted on the upper rotating body. In addition, the second of the counter weight
The lower surface of the block is fastened by bolts or the like, so that the counter weight can be securely held at the rear end of the swing frame. ## EQU00001 ##

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic explanatory view showing one embodiment of the present invention;
(A) is a schematic plan view of the counterweight, (B) is FIG.
It is a schematic front view of (A). FIG. 2 is a schematic explanatory view showing a section taken along line 2A─2A in FIG. 1 (B). FIG. 3 is a schematic plan view showing a slab material serving as a base material of a skeleton of the counterweight of FIG. 1 (A). FIGS. 4A to 4D are schematic plan views schematically showing first to fourth-stage slab die-cut products cut from the slab material of FIG. 3; FIG. 5 is a schematic explanatory view showing a side surface of a conventional hydraulic excavator. FIG. 6 is a schematic explanatory view showing the plane of FIG. 5; DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving structure 2sc Side cover 2uc Upper cover 4 Working device 6 Engine 10 Operator room 14 Counter weight 16 Hydraulic pump 18 Radiator 19 Radiator driving means 25a, 25b Swing frame 30 Block 31 1 block (1st slab cut product) 32 2nd block (2nd slab cut product) 33 3rd block (3rd slab cut product) 34 4th block (4th slab cut product) 35a, 35b Recess 36 Coupling means 37 Covering plate 40 Frame 42 Back side of counter weight 44 Front face of counter weight 47 Gap S Slab material

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shuichi Kataoka 27, Niijima, Harima-cho, Kako-gun, Hyogo Pref. Matsubara Techno Co., Ltd. (56) References JP-A-8-199630 (JP, A) JP-A-9-96 88125 (JP, A) Jikkai Hei 6-35298 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) B66C 23/74 B66F 9/075

Claims (1)

(57) [Claims] [Claim 1] Each divided block divided into a plurality of pieces along a vertical direction of a counter weight mounted on a construction machine is set by a design specification from a steel slab material. The counterweight skeleton, which is formed by stacking the cut-out divided blocks in the vertical direction and connecting them by a coupling means, a coating material covering the outer surface of the skeleton, and the skeleton And a lower end of the counter weight, which is divided into a plurality of pieces and a counter weight.
The first block and the first block,
A second block disposed above and connected to the
The rear end of the swing frame of construction machinery can be inserted and removed
And the recess provided in the configured counterweight.
The swing frame of the construction machine,
The rear end of the arm is attached to the second block, and the counter
A counterweight characterized by being configured to support a weight.