JP5709791B2 - Clamshell bucket - Google Patents

Clamshell bucket Download PDF

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JP5709791B2
JP5709791B2 JP2012092558A JP2012092558A JP5709791B2 JP 5709791 B2 JP5709791 B2 JP 5709791B2 JP 2012092558 A JP2012092558 A JP 2012092558A JP 2012092558 A JP2012092558 A JP 2012092558A JP 5709791 B2 JP5709791 B2 JP 5709791B2
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plate
welded
thick
plate portion
bottom plate
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JP2013221284A (en
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茂也 多田
茂也 多田
雅史 鈴木
雅史 鈴木
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Hitachi Construction Machinery Co Ltd
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Hitachi Construction Machinery Co Ltd
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Priority to JP2012092558A priority Critical patent/JP5709791B2/en
Priority to KR1020130041081A priority patent/KR102001256B1/en
Priority to CN201310137900.6A priority patent/CN103374935B/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/402—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors
    • E02F3/404—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors comprising two parts movable relative to each other, e.g. for gripping
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
    • E02F3/4136—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device with grabs mounted on a slidable or telescopic boom or arm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/412—Excavators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/02—Bucket grabs

Description

本発明は、一対のシェルを油圧シリンダにより開閉して土砂の掘削を行なうクラムシェルバケットに関する。   The present invention relates to a clamshell bucket for excavating earth and sand by opening and closing a pair of shells by a hydraulic cylinder.

自走式作業機の伸縮アームにクラムシェルバケットを取付けて掘削を行なう掘削機が例えば特許文献１に記載されている。このような掘削機に使用されるクラムシェルバケットは、一般に図７に示す構造を有している。このバケットは、中心部にチューブ可動式のバケットシリンダ５０を設け、そのロッドにシェル取付けフレーム５２を設け、この取付けフレーム５２に枢着ピン５３，５３により一対のシェル５１、５１を開閉可能に取付け、バケットシリンダ５０のチューブ５０ａと各シェル５１とをそれぞれリンク５４とピン５５，５６とにより連結して構成される。   For example, Patent Document 1 discloses an excavator that performs excavation by attaching a clamshell bucket to a telescopic arm of a self-propelled working machine. A clamshell bucket used in such an excavator generally has a structure shown in FIG. This bucket is provided with a tube movable bucket cylinder 50 in the center, a shell mounting frame 52 is provided on its rod, and a pair of shells 51 and 51 are attached to the mounting frame 52 by pivot pins 53 and 53 so that they can be opened and closed. The tube 50a of the bucket cylinder 50 and each shell 51 are connected by a link 54 and pins 55 and 56, respectively.

図８（Ａ）は従来のシェル５１の構造を示す側面図、（Ｂ）は（Ａ）のＥ−Ｅ断面図、（Ｃ）は底板後部の断面図である。図８（Ａ）に示すように、シェル５１は側面視が略扇状をなし、略弧状をなす底板５８の両端に左右の側板５９を溶接してなる。側板５９は、薄板部５９ａの周囲に略Ｖ字形の厚板部５９ｂを溶接６３（図８（Ｂ）参照）して構成される。この側板５９の後側、すなわちシェル５１どうしが対向する側の反対側の厚板部５９ｄには、前記ピン５３，５６を挿着するピン孔６０，６１を有する。底板５８は、前記側板５９の薄板部５９ａを両端に溶接した薄板部５８ａと、側板５９の厚板部５９ｂの前縁側先端５９ｃを両端に溶接した厚板部５８ｂと、側板５９の厚板部５９ｂの後縁側先端５９ｄを両端に溶接した厚板部５８ｃとにより構成される。６２は底板５８の厚板部５８ｂに取付けた掘削爪である。   8A is a side view showing the structure of a conventional shell 51, FIG. 8B is a cross-sectional view taken along line EE of FIG. 8A, and FIG. 8C is a cross-sectional view of the rear portion of the bottom plate. As shown in FIG. 8A, the shell 51 has a substantially fan shape in a side view, and is formed by welding left and right side plates 59 to both ends of a bottom plate 58 having a substantially arc shape. The side plate 59 is configured by welding 63 (see FIG. 8B) a substantially V-shaped thick plate portion 59b around the thin plate portion 59a. The thick plate portion 59d on the rear side of the side plate 59, that is, the side opposite to the side where the shells 51 face each other, has pin holes 60 and 61 into which the pins 53 and 56 are inserted. The bottom plate 58 includes a thin plate portion 58a in which the thin plate portion 59a of the side plate 59 is welded to both ends, a thick plate portion 58b in which the leading edge 59c of the thick plate portion 59b of the side plate 59 is welded to both ends, and a thick plate portion of the side plate 59. 59b is constituted by a thick plate portion 58c welded to both ends of a rear edge side front end 59d. An excavation claw 62 is attached to the thick plate portion 58b of the bottom plate 58.

特開２０１２−４６８８５号公報JP 2012-46885 A

クラムシェルバケットを掘削機の伸縮アーム等のフロントと共に引き上げる能力は、掘削機本体側の油圧装置の能力によって決定される。すなわち、バケット重量と掘削可能な土砂重量の和は一定となる。このため、バケット重量を減少させれば、掘削可能な土砂容量（重量）を大きくすることができる。従来のクラムシェルバケットの構造は、このような掘削可能な土砂容量を増大させる上において、改良すべき点があった。   The ability to lift the clamshell bucket together with the front of the telescopic arm of the excavator is determined by the ability of the hydraulic device on the excavator body side. That is, the sum of the bucket weight and the excavated earth and sand weight is constant. For this reason, if the bucket weight is reduced, the excavated earth and sand capacity (weight) can be increased. The conventional clamshell bucket structure has to be improved in order to increase the excavable sediment capacity.

本発明は、このような背景に基づき、バケットの強度を損なわずにバケット重量を可及的に小さくして掘削可能な土砂容量を増大させることが可能となる構造のクラムシェルバケットを提供することを目的とする。   Based on such a background, the present invention provides a clamshell bucket having a structure capable of increasing the capacity of excavated earth and sand by reducing the bucket weight as much as possible without impairing the strength of the bucket. With the goal.

請求項１のクラムシェルバケットは、
油圧シリンダにより開閉可能な１対のシェルを備え、前記シェルは、略弧状をなす底板と、その底板の両端に溶接された略扇状をなす側板とを備えたクラムシェルバケットにおいて、
前記底板における後縁から、前記側板の後縁の一部にわたり、前記底板および前記側板の各後縁の端面に板面を当てて補強板を溶接して取付けると共に、
前記補強板は、その底板溶接板部の両端から、側板溶接板部が延出して形成されており、前記底板溶接板部と前記側板溶接板部との間のコーナー部をＲ状に形成し、
前記側板の前縁側から、側板の頂部を経て後縁における途中部分にわたり、側板の他の部分より板厚の厚い厚板部を設け、
前記補強板の前記側板溶接板部の先端と前記厚板部の先端とを溶接した
ことを特徴とする。 The clamshell bucket of claim 1
A clamshell bucket comprising a pair of shells that can be opened and closed by a hydraulic cylinder, the shell comprising a bottom plate having a substantially arc shape, and side plates having a substantially fan shape welded to both ends of the bottom plate,
From the rear edge of the bottom plate, over a part of the rear edge of the side plate, and by attaching a reinforcing plate to the end surface of each rear edge of the bottom plate and the side plate by welding and attaching,
The reinforcing plate is formed such that side plate welded plate portions extend from both ends of the bottom plate welded plate portion, and a corner portion between the bottom plate welded plate portion and the side plate welded plate portion is formed in an R shape. ,
From the front edge side of the side plate, through the top of the side plate, over the middle part at the rear edge, providing a thick plate part thicker than the other part of the side plate,
The tip of the side plate welded plate portion of the reinforcing plate and the tip of the thick plate portion are welded .

請求項２のクラムシェルバケットは、請求項１に記載のクラムシェルバケットにおいて、
前記底板を、前縁側に設けた板厚の厚い厚板部と、この厚板部より板厚が薄く、前記厚板部から後縁にわたって設けられた薄板部とにより構成し、
前記底板の前記薄板部の後縁に前記補強板を溶接した
ことを特徴とする。 The clamshell bucket of claim 2 is the clamshell bucket of claim 1 ,
The bottom plate is constituted by a thick plate portion having a thick plate thickness provided on the front edge side, and a thin plate portion having a plate thickness thinner than the thick plate portion and provided from the thick plate portion to the rear edge,
The reinforcing plate is welded to a rear edge of the thin plate portion of the bottom plate.

請求項３のクラムシェルバケットは、請求項１または２に記載のクラムシェルバケットにおいて、
前記側板の前縁側に設ける厚板部における、その底板溶接部から側板の頂部に至る間の中間部の前縁の反対側を凹ませて前記厚板部を薄幅にした
ことを特徴とする。 The clamshell bucket according to claim 3 is the clamshell bucket according to claim 1 or 2 ,
In the thick plate portion provided on the front edge side of the side plate, the thick plate portion is thinned by denting the opposite side of the front edge of the intermediate portion between the bottom plate welded portion and the top portion of the side plate. .

請求項１の発明は、側板と底板の各後縁側に、側板や底板の端面に対して板面が接合されるように補強板を溶接したので、シェルの後縁側の底板と側板との接合部分ないしその近傍の強度が向上する。このため、側板と底板との後縁における溶接部ないしその近傍に設ける厚板を無くすることが可能となるかあるいは少なくすることができ、このことがシェルの重量ひいてはクラムシェルバケットの重量の削減につながり、バケットのサイズ、すなわち掘削可能な土砂容量を増大させることが可能となる。   According to the first aspect of the present invention, the reinforcing plate is welded to each side edge of the side plate and the bottom plate so that the plate surface is bonded to the end surface of the side plate or the bottom plate. The strength of the part or its vicinity is improved. For this reason, it is possible to eliminate or reduce the welded portion at the rear edge of the side plate and the bottom plate or the thick plate provided in the vicinity thereof, which can reduce the weight of the shell and thus the weight of the clamshell bucket. It is possible to increase the size of the bucket, that is, the excavated sediment capacity.

また、補強板は、その板面を、底板や側板の端面に対して接合する構造としたので、底板の変形を防止する上で効果的に作用する上、補強板のコーナー部はＲ状に形成したので、シェルの強度を低下させることがない。   In addition, since the reinforcing plate has a structure in which the plate surface is joined to the end surfaces of the bottom plate and the side plate, it effectively works to prevent the deformation of the bottom plate, and the corner portion of the reinforcing plate has an R shape. Since it was formed, the strength of the shell is not reduced.

また、前記側板のシェルどうしの対向縁である前縁側から、後縁における途中部分だけ厚板部により構成し、前記補強板の先端とその厚板部の先端とを溶接したので、従来のシェルにおいて、重量増大の原因となっていた側板の厚板部が減少し、バケット重量の減少に寄与させることができる。 Further, from the front edge side, which is the opposing edge of the shells of the side plates, only the middle part of the rear edge is constituted by a thick plate portion, and the tip of the reinforcing plate and the tip of the thick plate portion are welded. , The thick plate portion of the side plate that caused the increase in weight is reduced, which can contribute to the reduction in bucket weight.

請求項２の発明は、前記底板を、前縁側に設けた厚板部と、この板材より薄板でなり、前記厚さの大きな板材から後縁にわたって設けられた薄板部とにより構成し、この薄板部の後縁を補強板に溶接したので、補強板により底板強度を低下させることなく、底板の軽量化が達成され、バケット重量の減少に寄与させることができる。 According to a second aspect of the present invention, the bottom plate is composed of a thick plate portion provided on the front edge side, and a thin plate portion that is made of a thin plate from the plate material and extends from the thick plate material to the rear edge. Since the rear edge of the portion is welded to the reinforcing plate, the weight of the bottom plate can be reduced without reducing the strength of the bottom plate by the reinforcing plate, and the bucket weight can be reduced.

請求項３の発明は、側板の前縁側厚板部を、底板溶接部から側板の頂部に至る部分の中間部において、前縁の反対側を凹ませた形状に形成して薄幅としたので、掘削時に最も力が加わるシェルの底部近傍については厚板部の幅を減少させることなく強度が確保されると共に、側板の厚板部の幅が狭くなることにより、側板の軽量化が達成され、バケット重量の減少に寄与させることができる。 According to the invention of claim 3 , the front edge side thick plate portion of the side plate is formed in a thin shape by forming a shape in which the opposite side of the front edge is recessed in the middle portion from the bottom plate welded portion to the top portion of the side plate. In the vicinity of the bottom of the shell where the most force is applied during excavation, the strength is ensured without reducing the width of the thick plate portion, and the width of the thick plate portion of the side plate is reduced, thereby reducing the weight of the side plate. , Can contribute to a reduction in bucket weight.

本発明のクラムシェルバケットを適用する深掘掘削機の一例を示す側面図である。It is a side view which shows an example of the deep excavation machine which applies the clamshell bucket of this invention. 本発明のクラムシェルバケットの一実施の形態を示す側面図である。It is a side view showing one embodiment of the clamshell bucket of the present invention. （Ａ）は本実施の形態のクラムシェルバケットを構成するシェルを斜め上方より見た斜視図、（Ｂ）はこのシェルを斜め下方より見た斜視図である。(A) is the perspective view which looked at the shell which comprises the clamshell bucket of this Embodiment from diagonally upward, (B) is the perspective view which looked at this shell from diagonally downward. （Ａ）は本実施の形態のシェルの側面図、（Ｂ）はその平面図である。(A) is the side view of the shell of this Embodiment, (B) is the top view. （Ａ）は図４（Ａ）のＦ−Ｆ拡大断面図、（Ｂ）は図４（Ｂ）のＧ−Ｇ拡大断面図である。(A) is FF expanded sectional view of FIG. 4 (A), (B) is GG expanded sectional view of FIG. 4 (B). 本発明によるシェルの他の実施の形態を示す図５（Ｂ）相当図である。FIG. 6 is a view corresponding to FIG. 5 (B) showing another embodiment of a shell according to the present invention. 従来のクラムシェルバケットを示す側面図である。It is a side view which shows the conventional clamshell bucket. （Ａ）は従来のクラムシェルバケットを構成するシェルの側面図、（Ｂ）は（Ａ）のＥ−Ｅ拡大断面図、（Ｃ）はこのシェルの側板の後部と底板との溶接部を示す断面図である。(A) is the side view of the shell which comprises the conventional clamshell bucket, (B) is EE expanded sectional drawing of (A), (C) shows the welding part of the rear part and bottom plate of the side plate of this shell. It is sectional drawing.

図１は本発明によるクラムシェルバケットを適用する深掘掘削機の一例を示す側面図である。図１において、１は下部走行体、３はこの下部走行体１上に旋回装置２を介して設置された上部旋回体である。この上部旋回体３は、旋回フレーム３ａ上に油圧パワーユニット４、キャブ５およびカウンタウエイト６等を搭載して構成される。下部走行体１および上部旋回体２により自走式車両でなる掘削機本体を構成する。   FIG. 1 is a side view showing an example of a deep excavator to which a clamshell bucket according to the present invention is applied. In FIG. 1, reference numeral 1 denotes a lower traveling body, and 3 an upper revolving body installed on the lower traveling body 1 via a revolving device 2. The upper swing body 3 is configured by mounting a hydraulic power unit 4, a cab 5, a counterweight 6, and the like on a swing frame 3a. The lower traveling body 1 and the upper turning body 2 constitute an excavator body that is a self-propelled vehicle.

８は旋回フレーム３ａにブームシリンダ９により起伏可能に取付けられたブームである。１０はテレスコアームであり、このテレスコアーム１０は、アウタアーム１０ａとセンターアーム１０ｂとインナアーム１０ｃとをテレスコピックに組み合わせて構成される。このテレスコアーム１０は、アウタアーム１０ａをブーム８の先端にピン１１により連結し、アウタアーム１０ａとブーム８との間にアームシリンダ１４を取付け、このアームシリンダ１４の伸縮によりブーム８に対するテレスコアーム１０の傾斜角を変更可能としている。１６はインナアーム１０ｃの下端に取付けたクラムシェルバケットである。   A boom 8 is attached to the revolving frame 3a by a boom cylinder 9 so that it can be raised and lowered. Reference numeral 10 denotes a telescore, which is configured by telescopically combining an outer arm 10a, a center arm 10b, and an inner arm 10c. In this telescoreme 10, the outer arm 10 a is connected to the tip of the boom 8 by a pin 11, an arm cylinder 14 is attached between the outer arm 10 a and the boom 8, and the telescoreme 10 is inclined with respect to the boom 8 by the expansion and contraction of the arm cylinder 14. The corner can be changed. Reference numeral 16 denotes a clamshell bucket attached to the lower end of the inner arm 10c.

図２は本発明のクラムシェルバケット（以下バケットと称す。）１６の一実施の形態を示す側面図である。図２に示すように、この実施の形態のバケット１６は、中心部にチューブ可動式のバケットシリンダ２０を設けたものであり、このバケットシリンダ２０は、ピストン２０ａを中間部に固定したロッド２０ｂに対してチューブ２０ｃが上下動可能に外嵌された構造を有するものである。ロッド２０ｂの上端には前記伸縮ロッド１８またはテレスコアーム１０に連結するピン孔２１を有する。また、このロッド２０ｂの下端には、後述のシェル２２の支持体の役目を果たす取付けフレーム２３を設ける。このバケットシリンダ２０は、チューブ２０ｃ内におけるピストン２０ａより上部、下部にそれぞれ密閉した開き側室（バケット１６を開く際に作動油を供給する油室）２０ｄと閉じ側室（バケット１６を閉じる際に作動油を供給する油室）２０ｅを形成する。   FIG. 2 is a side view showing an embodiment of a clamshell bucket (hereinafter referred to as a bucket) 16 of the present invention. As shown in FIG. 2, the bucket 16 of this embodiment is provided with a tube movable bucket cylinder 20 at the center, and this bucket cylinder 20 is attached to a rod 20b having a piston 20a fixed to an intermediate portion. On the other hand, the tube 20c is externally fitted so as to be movable up and down. A pin hole 21 connected to the telescopic rod 18 or the telescore 10 is provided at the upper end of the rod 20b. An attachment frame 23 that serves as a support body for the shell 22 described later is provided at the lower end of the rod 20b. The bucket cylinder 20 includes an open side chamber (oil chamber that supplies hydraulic oil when the bucket 16 is opened) 20d and a closed side chamber (hydraulic oil when the bucket 16 is closed) that are sealed above and below the piston 20a in the tube 20c. Oil chamber) 20e is formed.

前記取付けフレーム２３に、一対のシェルシェル２２，２２を枢着ピン２４，２４により開閉可能に取付ける。２５はチューブ２０ｃの上下動によりシェル２２を開閉させるリンクであり、これらのリンク２５の上端をチューブ２０ｃにピン２６により連結し、下端をピン２７によりシェル２２に連結して取付ける。   A pair of shell shells 22 and 22 are attached to the attachment frame 23 by pivot pins 24 and 24 so as to be opened and closed. Reference numeral 25 denotes a link for opening and closing the shell 22 by the vertical movement of the tube 20c. The upper ends of these links 25 are connected to the tube 20c by pins 26, and the lower ends are connected to the shell 22 by pins 27 and attached.

次にシェル２２の構造を説明する。図３（Ａ），（Ｂ）および図４（Ａ），（Ｂ）に示すように、シェル２２は、側面視が略弧状をなす底板２８と、その底板２８の両端に溶接された側面視が略扇状をなす側板２９とを備える。底板２８は、シェルどうしの対向縁である前縁側に設けた厚板部２８ａとこの厚板部２８ａから後縁にわたって設けられ、厚板部２８ａより板厚が薄い薄板部２８ｂとにより構成される。なお、前縁側の厚板部２８ａには掘削爪３０（図２参照）が取付けられるが、図３、図４においては図示を省略している。   Next, the structure of the shell 22 will be described. As shown in FIGS. 3A and 3B and FIGS. 4A and 4B, the shell 22 includes a bottom plate 28 having a substantially arc shape in a side view, and a side view welded to both ends of the bottom plate 28. Includes a side plate 29 having a substantially fan shape. The bottom plate 28 includes a thick plate portion 28a provided on the front edge side which is an opposing edge of the shells, and a thin plate portion 28b which is provided from the thick plate portion 28a to the rear edge and is thinner than the thick plate portion 28a. . In addition, although the excavation claw 30 (refer FIG. 2) is attached to the thick board part 28a of the front edge side, illustration is abbreviate | omitted in FIG. 3, FIG.

側板２９は、互いに溶接される厚板部２９ａと、この厚板部２９ａより板厚が薄い薄板部２９ｂとからなり、厚板部２９ａは、前縁側に設けられる前板部２９ａ１と、側板２９を扇に例えた場合に扇の要部に相当する頂部２９ａ２と、この頂部２９ａ２を経て後縁の途中部分にわたって設けられた後板部２９ａ３とからなる。側板２９の薄板部２９ｂは、底板２８の薄板部２８ｂと側板２９の厚板部２９ａとの間にこれらに互いに溶接して設けられる。図５（Ａ）は厚板部２９ａと薄板部２９ｂとが溶接部３１により溶接された状態を示す。 The side plate 29 includes a thick plate portion 29a to be welded to each other and a thin plate portion 29b having a thickness smaller than that of the thick plate portion 29a. The thick plate portion 29a includes a front plate portion 29a1 provided on the front edge side, and a side plate 29. Is composed of a top part 29a2 corresponding to the main part of the fan, and a rear plate part 29a3 provided over the middle part of the rear edge via the top part 29a2. The thin plate portion 29 b of the side plate 29 is provided between the thin plate portion 28 b of the bottom plate 28 and the thick plate portion 29 a of the side plate 29 by welding to each other. FIG. 5A shows a state where the thick plate portion 29 a and the thin plate portion 29 b are welded by the welded portion 31.

後板部２９ａ３には、図２に示した枢着ピン２４を挿着するピン孔３２とリンク２５を連結するピン２７を挿着するピン孔３３を設ける。   A pin hole 32 into which the pivot pin 24 shown in FIG. 2 is inserted and a pin hole 33 into which the pin 27 connecting the link 25 is inserted are provided in the rear plate portion 29a3.

３４は本発明により設けた補強板である。この補強板３４は、底板２８の薄板部２８ｂの後縁に溶接した底板溶接板部３４ａと、この底板溶接板部３４ａの両端から延出して形成した側板溶接板部３４ｂとからなり、この補強板３４は、底板２８の薄板部２８ｂの後縁の端面に底板溶接板部３４ａの板面を当て、側板２９の薄板部２９ｂの後縁の端面に側板溶接板部３４ｂの板面を当てて溶接する。図５（Ｂ）に底板２８の薄板部２８ｂと底板溶接板部３４ａとの溶接部３５を示す。また、図５（Ｂ）に示すように、側板２９の厚板部２９ａ３の先端と補強板３４の側板溶接板部３４ｂの先端との間は溶接部３６において溶接する。また、底板溶接板部３４ａと側板溶接板部３４ｂとの間のコーナー部３４ｃは応力緩和のためにＲ状に形成する。   Reference numeral 34 denotes a reinforcing plate provided according to the present invention. The reinforcing plate 34 includes a bottom plate welded plate portion 34a welded to the rear edge of the thin plate portion 28b of the bottom plate 28, and side plate welded plate portions 34b formed extending from both ends of the bottom plate welded plate portion 34a. The plate 34 applies the plate surface of the bottom plate weld plate portion 34a to the end surface of the thin plate portion 28b of the bottom plate 28, and applies the plate surface of the side plate weld plate portion 34b to the end surface of the thin plate portion 29b of the side plate 29. Weld. FIG. 5B shows a welded portion 35 between the thin plate portion 28b of the bottom plate 28 and the bottom plate welded plate portion 34a. Further, as shown in FIG. 5B, the welded portion 36 welds the tip of the thick plate portion 29 a 3 of the side plate 29 and the tip of the side plate welded plate portion 34 b of the reinforcing plate 34. Further, the corner portion 34c between the bottom plate welded plate portion 34a and the side plate welded plate portion 34b is formed in an R shape for stress relaxation.

本実施の形態においては、底板２８と側板２９の各後縁側に、底板２８や側板２９の端面に対して板面が接合されるように補強板３４を溶接したので、シェル２２の後縁側の底板２８と側板２９との接合部分ないしその近傍の強度が向上する。また、補強板３４は、その板面を、底板２８や側板２９の端面に対して板面を接合する構造としたので、底板２８や側板２９の変形を防止する上で効果的に作用する。このため、本実施の形態で示すように、底板２８と側板２９の後縁における溶接部ないしその近傍の厚板を無くすることが可能となる。   In the present embodiment, the reinforcing plate 34 is welded to the respective rear edge sides of the bottom plate 28 and the side plate 29 so that the plate surfaces are joined to the end surfaces of the bottom plate 28 and the side plate 29. The strength of the joint portion between the bottom plate 28 and the side plate 29 or the vicinity thereof is improved. Further, since the reinforcing plate 34 has a structure in which the plate surface is joined to the end surfaces of the bottom plate 28 and the side plate 29, it effectively acts to prevent the deformation of the bottom plate 28 and the side plate 29. For this reason, as shown in the present embodiment, it is possible to eliminate the welded portion at the rear edge of the bottom plate 28 and the side plate 29 or a thick plate in the vicinity thereof.

これにより、シェルの重量ひいてはクラムシェルバケットの重量の削減が可能となり、その分だけバケット１６のサイズを増大させ、掘削可能な土砂容量を増大させることが可能となる。具体的には、シェル２２自体の重量をおおよそ２割前後削減でき、これにより、従来例えば１．３ｍ３の掘削容量しか得られなかったものに対し、同じバケット重量で約１．４ｍ３程度に掘削容量を増大させることができる。また、補強板３４は、その板面を底板２８や側板２９の端面に対して板面を接合する構造とした上、補強板３４のコーナー部３４ｃはＲ状に形成したので、シェル２２の強度を低下させることがない。 As a result, the weight of the shell and thus the weight of the clamshell bucket can be reduced, and the size of the bucket 16 can be increased by that amount, thereby increasing the sediment capacity that can be excavated. Specifically, the weight of the shell 22 itself can be reduced by about 20%, so that, for example, a conventional excavation capacity of only 1.3 m 3 can be obtained, but the same bucket weight is reduced to about 1.4 m 3 . Drilling capacity can be increased. Further, the reinforcing plate 34 has a structure in which the plate surface is joined to the end surfaces of the bottom plate 28 and the side plate 29, and the corner portion 34c of the reinforcing plate 34 is formed in an R shape. Is not reduced.

本発明を実施する場合、図６に示すように、底板２８の後縁に厚板部２８ｃを設けたり、側板２９の底板溶接部ないしその近傍に厚板部２９ｃを設けてもよい。この場合、シェル２２の後部の強度を補強板３４により増大させているので、これらの厚板部２８ｃ，２９ｃの幅Ｗ１は従来よりはるかに狭くすることができ、シェル２２の軽量化が可能となる。   When practicing the present invention, as shown in FIG. 6, a thick plate portion 28 c may be provided at the rear edge of the bottom plate 28, or a thick plate portion 29 c may be provided at the bottom plate welded portion of the side plate 29 or in the vicinity thereof. In this case, since the strength of the rear portion of the shell 22 is increased by the reinforcing plate 34, the width W1 of these thick plate portions 28c and 29c can be made much narrower than before, and the weight of the shell 22 can be reduced. Become.

図６の構造に比較して、図３〜図５に示したように、側板２９の頂部２９ａ２から後縁における途中部分にのみ厚板部２９ａ３を設け、その厚板部２９ａ３の先端と補強板３４とを溶接する構造とすることにより、従来のシェルにおいて、重量増大の原因となっていた側板の厚板部が大幅に減少し、バケット重量の減少に寄与させることができる。   Compared with the structure of FIG. 6, as shown in FIGS. 3 to 5, a thick plate portion 29 a 3 is provided only in the middle portion of the rear edge from the top portion 29 a 2 of the side plate 29, and the leading end of the thick plate portion 29 a 3 and the reinforcing plate By adopting a structure in which the steel plate 34 is welded, the thick plate portion of the side plate that has caused the increase in weight in the conventional shell is greatly reduced, which can contribute to the reduction in the bucket weight.

また、図３〜図５に示したように、底板２８を、前縁側に設けた厚板部２８ａから後縁にわたって薄板部２８ｂによって構成し、この薄板部２８ｂに補強板３４を溶接することにより、底板２８の軽量化が達成され、バケット重量の減少に寄与させることができる。 Also, as shown in FIGS. 3 to 5, the bottom plate 28 is constituted by the thin plate portion 28b from the thick plate portion 28a provided on the front edge side to the rear edge, and the reinforcing plate 34 is welded to the thin plate portion 28b. The weight reduction of the bottom plate 28 is achieved, which can contribute to the reduction of the bucket weight.

また、図４（Ｂ）に示すように、本実施の形態においては、側板の前縁側に設ける厚板部２９ａ１を、底板溶接部から頂部２９ａ２にわたる中間部において、前縁の反対側に凹部３７に形成したので、前縁側の厚板部２９ａ１の中間部の幅Ｗ２が狭くなり、側板の厚板部２９ａの全体量が減少させることができるため、側板２９の軽量化が達成され、バケット重量の減少に寄与させることができる。また、たとえこのような凹部３７を設けたとしても、掘削時に最も力が加わるシェル２２の頂部２９ａ２は厚板部により幅を狭めることなく構成すると共に、底板２８の前縁側とその近傍の側板２９も厚板部２８ａ，２９ａ１により幅を狭めることなく構成したので、シェル２２の強度が確保される。なお、本実施の形態においては、凹部３７をＲ状に形成したが、この凹部３７はＲ状以外の曲線状あるいは角形に形成してもよい。   As shown in FIG. 4B, in the present embodiment, the thick plate portion 29a1 provided on the front edge side of the side plate is provided with a concave portion 37 on the opposite side of the front edge in the intermediate portion extending from the bottom plate welded portion to the top portion 29a2. Since the width W2 of the intermediate portion of the thick plate portion 29a1 on the front edge side is narrowed and the total amount of the thick plate portion 29a of the side plate can be reduced, the weight of the side plate 29 is achieved, and the bucket weight This can contribute to the reduction of. Even if such a concave portion 37 is provided, the top portion 29a2 of the shell 22 to which the most force is applied at the time of excavation is configured without being narrowed by the thick plate portion, and the front plate side of the bottom plate 28 and the side plate 29 in the vicinity thereof. Since the thick plate portions 28a and 29a1 are configured without reducing the width, the strength of the shell 22 is ensured. In this embodiment, the concave portion 37 is formed in an R shape, but the concave portion 37 may be formed in a curved shape or a rectangular shape other than the R shape.

上記実施の形態においては、後板部２９ａ３を一枚の板により構成した例について示したが、この後板部２９ａ３を２枚の板により構成してその２枚の板の間に取付けフレーム２３に設けたブラケットやリンク２５を挿入してピン付けする構造にも本発明を適用することができる。   In the above-described embodiment, an example in which the rear plate portion 29a3 is constituted by a single plate has been shown. However, the rear plate portion 29a3 is constituted by two plates and provided on the attachment frame 23 between the two plates. The present invention can also be applied to a structure in which a bracket or link 25 is inserted and pinned.

また、取付けフレーム２３に、シェル２２の内壁に近接させて、掻き出しフレームを取付ける場合もあるが、そのような掻き出しフレームを取付けたクラムシェルバケットにも本発明を適用することが可能である。   Further, the scraping frame may be attached to the mounting frame 23 in the vicinity of the inner wall of the shell 22, but the present invention can also be applied to a clamshell bucket to which such a scraping frame is mounted.

また、本発明は、ロッド２０ｂとシェル２２との間にシェル開閉用の油圧シリンダを取付けた構成のクラムシェルバケットにも適用することができる。その他、本発明を実施する場合、上記実施の形態に限らず、本発明の要旨を逸脱しない範囲において、種々の変更、付加が可能である。   The present invention can also be applied to a clamshell bucket having a configuration in which a hydraulic cylinder for opening and closing the shell is attached between the rod 20 b and the shell 22. In addition, when implementing this invention, not only the said embodiment but a various change and addition are possible in the range which does not deviate from the summary of this invention.

１６：クラムシェルバケット、２０：バケットシリンダ、２２：シェル、２８：底板、２８ａ，２８ｃ：厚板部、２８ｂ：薄板部、２９：側板、２９ａ：厚板部、２９ａ１：前板部、２９ａ２：頂部、２９ａ３：後板部、２９ｂ：薄板部、３０：掘削爪、３１，３５，３６：溶接部、３２，３３：ピン孔、３４：補強板、３４ａ：底板溶接板部、３４ｂ：側板溶接板部、３４ｃ：コーナー部、３７：凹部 16: Clamshell bucket, 20: Bucket cylinder, 22: Shell, 28: Bottom plate, 28a, 28c: Thick plate portion, 28b: Thin plate portion, 29: Side plate, 29a: Thick plate portion, 29a1: Front plate portion, 29a2: Top part, 29a3: rear plate part, 29b: thin plate part, 30: excavation claw, 31, 35, 36: welded part, 32, 33: pin hole, 34: reinforcing plate, 34a: bottom plate welded plate part, 34b: side plate welded Plate part, 34c: Corner part, 37: Concave part

Claims (3)

油圧シリンダにより開閉可能な１対のシェルを備え、前記シェルは、略弧状をなす底板と、その底板の両端に溶接された略扇状をなす側板とを備えたクラムシェルバケットにおいて、
前記底板における後縁から、前記側板の後縁の一部にわたり、前記底板および前記側板の各後縁の端面に板面を当てて補強板を溶接して取付けると共に、
前記補強板は、その底板溶接板部の両端から、側板溶接板部が延出して形成されており、前記底板溶接板部と前記側板溶接板部との間のコーナー部をＲ状に形成し、
前記側板の前縁側から、側板の頂部を経て後縁における途中部分にわたり、側板の他の部分より板厚の厚い厚板部を設け、
前記補強板の前記側板溶接板部の先端と前記厚板部の先端とを溶接した
ことを特徴とするクラムシェルバケット。 A clamshell bucket comprising a pair of shells that can be opened and closed by a hydraulic cylinder, the shell comprising a bottom plate having a substantially arc shape, and side plates having a substantially fan shape welded to both ends of the bottom plate,
From the rear edge of the bottom plate, over a part of the rear edge of the side plate, and by attaching a reinforcing plate to the end surface of each rear edge of the bottom plate and the side plate by welding and attaching,
The reinforcing plate is formed such that side plate welded plate portions extend from both ends of the bottom plate welded plate portion, and a corner portion between the bottom plate welded plate portion and the side plate welded plate portion is formed in an R shape. ,
From the front edge side of the side plate, through the top of the side plate, over the middle part at the rear edge, providing a thick plate part thicker than the other part of the side plate,
A clamshell bucket , wherein the end of the side plate welded plate portion of the reinforcing plate is welded to the end of the thick plate portion . 請求項１に記載のクラムシェルバケットにおいて、
前記底板を、前縁側に設けた板厚の厚い厚板部と、この厚板部より板厚が薄く、前記厚板部から後縁にわたって設けられた薄板部とにより構成し、
前記底板の前記薄板部の後縁に前記補強板を溶接した
ことを特徴とするクラムシェルバケット。 The clamshell bucket of claim 1,
The bottom plate is constituted by a thick plate portion having a thick plate thickness provided on the front edge side, and a thin plate portion having a plate thickness thinner than the thick plate portion and provided from the thick plate portion to the rear edge,
A clamshell bucket , wherein the reinforcing plate is welded to a rear edge of the thin plate portion of the bottom plate . 請求項１または２に記載のクラムシェルバケットにおいて、
前記側板の前縁側に設ける厚板部における、その底板溶接部から側板の頂部に至る間の中間部の前縁の反対側を凹ませて前記厚板部を薄幅にした
ことを特徴とするクラムシェルバケット。 The clamshell bucket according to claim 1 or 2 ,
In the thick plate portion provided on the front edge side of the side plate, the thick plate portion is thinned by denting the opposite side of the front edge of the intermediate portion between the bottom plate welded portion and the top portion of the side plate. Clamshell bucket.
JP2012092558A 2012-04-16 2012-04-16 Clamshell bucket Active JP5709791B2 (en)

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CN201310137900.6A CN103374935B (en) 2012-04-16 2013-04-15 Clamshell grab bucket

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JP2019120087A (en) * 2018-01-10 2019-07-22 日立建機株式会社 Clamshell bucket

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JPS60258335A (en) * 1984-06-04 1985-12-20 Katsunori Tanada Hydraulically-operated bucket device for scooping up soil and sand
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Publication number Priority date Publication date Assignee Title
USD983235S1 (en) 2021-08-26 2023-04-11 Caterpillar Inc. Excavator thumb

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KR102001256B1 (en) 2019-07-17
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CN103374935B (en) 2017-04-12
CN103374935A (en) 2013-10-30

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