JPH09165773A - Working machine for hydraulic backhoe - Google Patents
Working machine for hydraulic backhoeInfo
- Publication number
- JPH09165773A JPH09165773A JP34764895A JP34764895A JPH09165773A JP H09165773 A JPH09165773 A JP H09165773A JP 34764895 A JP34764895 A JP 34764895A JP 34764895 A JP34764895 A JP 34764895A JP H09165773 A JPH09165773 A JP H09165773A
- Authority
- JP
- Japan
- Prior art keywords
- arm
- welding
- sections
- lower split
- connecting member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は油圧ショベル等の建
設機械等に用いられ分割部材を一体形成するブーム、ア
ーム等の作業機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine such as a boom or an arm which is used for a construction machine such as a hydraulic excavator or the like and integrally forms a divided member.
【０００２】[0002]
【従来の技術】従来の油圧ショベルのブーム、アーム等
の作業機の構造について図６乃至図１１を参照して説明
する。先ず、油圧ショベル２０について図６により説明
する。下部走行体２１の上部には旋回サークル２２を介
して、図示しない旋回モータにより旋回可能な上部旋回
体２３が装着されている。この上部旋回体２３に取着す
る作業機３０は、ブーム３１、アーム３３およびバケッ
ト３５等からなり、このブーム３１、アーム３３は各油
圧シリンダ３２，３４の駆動により回動自在となってい
る。バケット３５はバケットシリンダ３６の駆動により
リストリンク３７を介して回動自在となっている。2. Description of the Related Art The structure of a conventional work machine such as a boom and an arm of a hydraulic excavator will be described with reference to FIGS. First, the hydraulic excavator 20 will be described with reference to FIG. An upper revolving structure 23, which is revolvable by a revolving motor (not shown), is attached to the upper part of the lower traveling structure 21 via a revolving circle 22. The work machine 30 attached to the upper revolving structure 23 includes a boom 31, an arm 33, a bucket 35, and the like. The boom 31 and the arm 33 are rotatable by driving the hydraulic cylinders 32 and 34. The bucket 35 is rotatable by a bucket cylinder 36 via a wrist link 37.
【０００３】上記の作業機３０を構成するブーム３１、
アーム３３は、箱形の略同一構造のため、本特許明細書
ではアーム３３の構造について説明する。図７は従来構
造のアーム３３を示している。図８は図７の断面Ｄ−Ｄ
を示し、従来のアームの断面形状の３例を（ａ），
（ｂ），（ｃ）で表している。従来のアーム３３は中空
構造物として形成され、図８の（ａ）、（ｂ）、（ｃ）
に示されるような矩形断面を形成している。図８（ａ）
は、上板３３ａ，下板３３ｂ，および一対の側板３３
ｃ，３３ｄの４枚板を溶接で一体構成している。図８
（ｂ）は、Ｕ字状板３３ｅの開口部の内端部に下板３３
ｆを溶接で一体構成している。図８（ｃ）は、Ｕ字状板
３３ｅの開口部の外端部に下板３３ｇを溶接で一体構成
している。このように、所定の断面構造により従来のア
ーム３３は製作されている。従って、各板材の溶接線は
必ず断面角部の稜線部分に沿って位置している。A boom 31, which constitutes the working machine 30,
Since the arms 33 have a substantially box-shaped structure, the structure of the arms 33 will be described in this patent specification. FIG. 7 shows an arm 33 having a conventional structure. FIG. 8 is a cross section D-D of FIG. 7.
Fig. 3 shows three examples of conventional arm cross-sectional shapes (a),
It is represented by (b) and (c). The conventional arm 33 is formed as a hollow structure and is shown in FIGS. 8 (a), 8 (b) and 8 (c).
To form a rectangular cross section. FIG. 8 (a)
Is an upper plate 33a, a lower plate 33b, and a pair of side plates 33.
The c and 33d four plates are integrally formed by welding. FIG.
(B) shows the lower plate 33 at the inner end of the opening of the U-shaped plate 33e.
f is integrally formed by welding. In FIG. 8C, the lower plate 33g is integrally formed by welding on the outer end of the opening of the U-shaped plate 33e. In this way, the conventional arm 33 is manufactured with a predetermined sectional structure. Therefore, the weld line of each plate material is always located along the ridge line portion of the corner of the cross section.
【０００４】ところで、油圧ショベル等の建設機械の作
業機は、掘削作業中に捩じり負荷等が加わって、箱形の
アームの角部に高応力が発生する。このような問題を解
決するために、出願人は特開平６−２２０８８１号を出
願している。同公報によれば、図９、１０に示すよう
に、建設機械等に用いられるブーメラン形状のブーム５
０は、ブーム本体を断面中立軸もしくはその近傍で長手
方向に上部分割体５０ａと下部分割体５０ｂに分離した
分割体によって形成し、その分割線に沿って溶接一体化
し、作業中の負荷によってブーム５０に発生する高い応
力が溶接部分に集中しないようにしたものである。In a working machine for construction machines such as a hydraulic excavator, a torsional load is applied during excavation work, so that high stress is generated at the corners of the box-shaped arm. In order to solve such a problem, the applicant has filed Japanese Patent Application Laid-Open No. 6-220881. According to the publication, as shown in FIGS. 9 and 10, a boomerang-shaped boom 5 used in a construction machine or the like.
No. 0 is a boom body formed by a divided body which is divided into an upper divided body 50a and a lower divided body 50b in the longitudinal direction at or near the neutral axis of the cross section, and is welded and integrated along the dividing line, so that the boom body is subjected to a load during work. The high stress generated in 50 is prevented from concentrating on the welded portion.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、図８
（ａ），（ｂ），（ｃ）に示すアームの構造では、油圧
ショベルの作業中に高応力が発生すると、アーム溶接部
に欠陥などがあると亀裂発生および板材のノッチ効果等
により耐久寿命が低下する。このため、上記板材を厚く
すると重量増加するとの新たな問題がある。However, FIG.
In the arm structure shown in (a), (b), and (c), if high stress occurs during the operation of the hydraulic excavator, if there is a defect in the arm welding part, cracks will occur and the notch effect of the plate material will result in a durable life. Is reduced. Therefore, there is a new problem that the weight increases when the plate material is thickened.
【０００６】また、前記の特開平６−２２０８８１号公
報においては、図１１に示すように、上下分割体の接合
部（合わせ面）を隙間なく合わせることが困難である。
この上下分割体の接合部に不整合が生じると溶接品質が
著しく悪くなり、耐久寿命が低下するという問題があ
る。また軽量化のために薄板大断面構造とした場合、分
割線と直角な軸回りの曲げ外力に対する壁面の座屈強度
が低下するため、別手段によって座屈強度を上げなけれ
ばならないという問題がある。Further, in the above-mentioned Japanese Patent Laid-Open No. 6-220881, as shown in FIG. 11, it is difficult to align the joining portions (the mating surfaces) of the upper and lower divided bodies without a gap.
If the upper and lower divided bodies are misaligned with each other, the welding quality is significantly deteriorated and the durability life is shortened. In addition, if the thin plate has a large cross-sectional structure for weight reduction, the buckling strength of the wall surface against external bending force around the axis perpendicular to the parting line decreases, so there is a problem that the buckling strength must be increased by another means. .
【０００７】本発明は上記従来の問題点に着目し、油圧
ショベルの作業機の断面中立軸もしくはその近傍で長手
方向に上下に分割した上部分割部材と、下部分割部材
と、連結板とを備えて、この連結板を挟んで上部分割部
材と下部分割部材とを一体に固着して、剛性を上げると
共に、軽量化を図る油圧ショベルの作業機を提供するこ
とを目的とする。Focusing on the above-mentioned conventional problems, the present invention is provided with an upper split member, a lower split member, and a connecting plate which are vertically split in the longitudinal direction at or near the cross-section neutral axis of the working machine of the hydraulic excavator. It is an object of the present invention to provide a working machine for a hydraulic excavator, in which the upper split member and the lower split member are integrally fixed to each other with the connecting plate sandwiched therebetween to increase rigidity and reduce weight.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明の油圧ショベルの作業機は、車体より順次連
結されるブームおよびアームからなる作業機と、このブ
ームおよびアームは長手方向に上部分割部材と下部分割
部材とを一体に形成されたものからなる油圧ショベルの
作業機であって、前記ブームあるいはアームの断面形状
の一面に開口部を有する上部分割部材１２ａおよび下部
分割部材１２ｂと、前記上部分割部材１２ａと下部分割
部材１２ｂとの間に挟んで固着した連結板１２ｃとから
なる構成としたものである。In order to achieve the above object, a working machine for a hydraulic excavator according to the present invention is a working machine including a boom and an arm that are sequentially connected to a vehicle body, and the boom and the arm are arranged in a longitudinal direction. A working machine for a hydraulic excavator including an upper split member and a lower split member that are integrally formed, including an upper split member 12a and a lower split member 12b each having an opening on one surface of a cross-sectional shape of the boom or arm. The upper split member 12a and the lower split member 12b are sandwiched and fixed to each other with a connecting plate 12c.
【０００９】また、上記構成において、前記上部分割部
材１２ａおよび下部分割部材１２ｂの形状は、Ｕ字状、
台形状、半円形状および半楕円形状とした構成としたも
のである。Further, in the above structure, the upper dividing member 12a and the lower dividing member 12b are U-shaped,
It has a trapezoidal shape, a semicircular shape, and a semielliptical shape.
【００１０】そして、上記構成において、前記連結部材
１２ｃの幅方向の長さＳ2 と、前記上部分割部材１２ａ
および下部分割部材１２ｂの開口部の長さＳ1 とは、Ｓ
2 ≧Ｓ1 とした構成としたものである。Further, in the above structure, the length S2 of the connecting member 12c in the width direction and the upper dividing member 12a.
And the length S1 of the opening of the lower dividing member 12b is S
The configuration is such that 2 ≧ S1.
【００１１】[0011]
【作用】上記構成によれば、ブームおよびアームは上下
分割部材を連結部材を挟んで分割線に沿って溶接するこ
とにより形成されるため、溶接線は中立軸線となりブー
ムおよびアームの角部に溶接箇所が存在しないようにす
ると共に、上下分割部材の間に連結部材があるため、上
下分割部材の合わせ面に不整合が生ぜず、良好な溶接品
質が得られるので亀裂の発生がない。According to the above construction, since the boom and the arm are formed by welding the upper and lower split members along the dividing line with the connecting member sandwiched therebetween, the welding line becomes the neutral axis and is welded to the corners of the boom and the arm. Since there are no locations, and because there is a connecting member between the upper and lower split members, there is no misalignment on the mating surfaces of the upper and lower split members, and good welding quality is obtained, so cracks do not occur.
【００１２】また上下分割線と直角な軸回りの曲げ外力
に対しても連結部材により剛性アップとなり上下分割部
材の壁面の座屈強度を向上させることができる。Further, the rigidity is increased by the connecting member against the bending external force around the axis perpendicular to the upper and lower dividing lines, and the buckling strength of the wall surface of the upper and lower dividing members can be improved.
【００１３】[0013]
【発明の実施の形態】以下に本発明に係る油圧ショベル
のアームの実施例を図１乃至図６を参照して説明する。DETAILED DESCRIPTION OF THE INVENTION An embodiment of an arm of a hydraulic excavator according to the present invention will be described below with reference to FIGS.
【００１４】図１はアームの側面図である。図２は図１
の断面Ａ−Ａ、図３は図１の断面Ｂ−Ｂ、図４は図３の
断面Ｃ−Ｃを示す。先ず、図１に示すように、アーム１
０はアーム本体１２を有している。このアーム本体１２
の先端中央部には図６に示すバケット３５、およびリス
トリンク３７を取着するための各ボス部１３，１４が設
けられている。また、アーム本体１２の後方中央部には
図６に示すブーム３１を取着するためのボス部１５が設
けられている。更に、後方上部および後方端部には図６
に示すバケットシリンダ３６およびアームシリンダ３４
を取着するためのブラケット１６、１７が設けられてい
る。FIG. 1 is a side view of the arm. FIG. 2 shows FIG.
3 is a cross section A-A, FIG. 3 is a cross section B-B of FIG. 1, and FIG. 4 is a cross section C-C of FIG. First, as shown in FIG.
0 has an arm body 12. This arm body 12
A bucket 35 shown in FIG. 6 and bosses 13 and 14 for attaching the wrist link 37 are provided at the center of the tip of the. Further, a boss portion 15 for attaching the boom 31 shown in FIG. 6 is provided at the rear center of the arm body 12. Further, as shown in FIG.
Bucket cylinder 36 and arm cylinder 34 shown in FIG.
Brackets 16 and 17 are provided for mounting.
【００１５】次に、図２に示すアーム１０のアーム本体
１２について説明する。このアーム本体１２は、本体断
面における上下方向の中立面とアーム側壁面とが交差す
る中立軸線に沿った分割線により上下に分割された上部
分割部材１２ａと、下部分割部材１２ｂとを備えてい
る。この上下分割部材１２ａ，１２ｂは板材からなる素
材をロールあるいはプレス加工により、Ｕ字状の断面と
なるように形成している。そして、この上下分割部材１
２ａ，１２ｂの開口部が互いに向き合うようにして連結
部材１２ｃを挟んで上下分割部材１２ａ，１２ｂの外側
壁面の端部をそれぞれ連結部材１２ｃの上下面に溶接に
より固着している。この連結部材１２ｃの幅方向の長さ
Ｓ2 と、前記上部分割部材１２ａおよび下部分割部材１
２ｂの開口部の長さＳ1 とは、Ｓ2 ≧Ｓ1 としている。Next, the arm body 12 of the arm 10 shown in FIG. 2 will be described. The arm main body 12 is provided with an upper split member 12a and a lower split member 12b that are vertically split by a split line along a neutral axis that intersects a neutral plane in the vertical direction in the body cross section and the arm side wall surface. There is. The upper and lower split members 12a and 12b are formed by rolling or pressing a material made of a plate material so as to have a U-shaped cross section. Then, the upper and lower split members 1
The ends of the outer wall surfaces of the upper and lower split members 12a and 12b are fixed to the upper and lower surfaces of the connecting member 12c by welding with the connecting member 12c sandwiched so that the openings of 2a and 12b face each other. The length S2 of the connecting member 12c in the width direction, the upper dividing member 12a and the lower dividing member 1
The length S1 of the opening of 2b is S2.gtoreq.S1.
【００１６】図３により前記ボス部１５について説明す
る。このボス部１５は、上下分割部材１２ａ，１２ｂ
と、連結部材１２ｃと、補強板１２ｄとを溶接により一
体的に固着されている。前記ボス部１３，１４も同様の
構造となっており、説明は省略する。図４はボス部１５
と連結部材１２ｃが溶接により固着されている状態を示
す。The boss portion 15 will be described with reference to FIG. The boss portion 15 includes the upper and lower split members 12a and 12b.
The connecting member 12c and the reinforcing plate 12d are integrally fixed by welding. The boss portions 13 and 14 have the same structure, and a description thereof will be omitted. FIG. 4 shows the boss 15
And the connecting member 12c are fixed by welding.
【００１７】次に、図１乃至図４の作動について説明す
る。前記アーム１０により作業を行うと、アーム１０に
各方向から負荷が加わり、これによりアーム本体１２の
角部には高い応力が発生するが、アーム本体１２の角部
は１枚板を曲げ加工しているため溶接部がなく高剛性で
ある。また、上下分割部材１２ａ，１２ｂを連結部材１
２ｃに固着する溶接線はアーム１０の中立軸線に沿って
いるため、溶接部分に高い応力が発生しない。このため
アームの耐久性を大幅に向上させることができる。Next, the operation of FIGS. 1 to 4 will be described. When the work is performed by the arm 10, a load is applied to the arm 10 from each direction, which causes a high stress in the corner portion of the arm body 12, but the corner portion of the arm body 12 is formed by bending a single plate. Therefore, there is no welded part and it has high rigidity. Further, the upper and lower split members 12a and 12b are connected to the connecting member 1
Since the welding line fixed to 2c is along the neutral axis of the arm 10, high stress does not occur in the welded portion. Therefore, the durability of the arm can be significantly improved.
【００１８】更に、上下分割部材１２ａ，１２ｂを連結
部材１２ｃに溶接することにより、従来の上下分割部材
を直接突き合わせて溶接する構造に比べて、合わせ面に
不整合が生ぜず、溶接時の吹き抜けも無く、溶接部の耐
久性が向上する。また、その合わせ面のズレに注意を払
う必要がなく、連結部材１２ｃの幅方向の長さＳ2 と、
上下分割部材１２ａ, １２ｂの開口部の長さＳ1 とはＳ
2 ≧Ｓ1としたので、溶接が容易となる。Further, by welding the upper and lower split members 12a and 12b to the connecting member 12c, as compared with the conventional structure in which the upper and lower split members are directly butted against each other, no misalignment occurs in the mating surfaces, and blow-through at the time of welding is performed. And the durability of the welded part is improved. Further, it is not necessary to pay attention to the deviation of the mating surfaces, and the length S2 of the connecting member 12c in the width direction is
The length S1 of the opening of the upper and lower split members 12a, 12b is S
Since 2 ≧ S1, welding becomes easy.
【００１９】更に、アーム１０に上下分割線と直角な軸
回りの曲げ外力に対しても連結部材により剛性アップと
なり上下分割部材の壁面の座屈強度を向上させることが
できる。Further, the rigidity of the arm 10 is increased by the connecting member against the bending external force around the axis perpendicular to the vertical dividing line, and the buckling strength of the wall surface of the vertical dividing member can be improved.
【００２０】そして、連結部材１２ｃでボス部１３、１
４、１５の支持が有効に行えるので、補強板１２ｄを適
宜設けることにより上下分割部材１２ａ, １２ｂの薄
板、軽量化を図ることができる。Then, the boss portions 13, 1 are formed by the connecting member 12c.
Since the supporting members 4 and 15 can be effectively supported, it is possible to reduce the thickness and weight of the upper and lower split members 12a and 12b by appropriately providing the reinforcing plate 12d.
【００２１】次に、アーム１０のアーム本体１２の他の
実施例を図５により説明する。図５は図２の断面Ａ−Ａ
に相当する図である。図５（ａ）は略台形状の上部分割
部材４０ａおよび下部分割部材４０ｂと、連結部材４０
ｃとを備え、上部分割部材４０ａと下部分割部材４０ｂ
との間に連結部材４０ｃを挟んで溶接により固着したも
のである。図５（ｂ）は円形状の上部分割部材４１ａお
よび下部分割部材４１ｂと、連結部材４０ｃとを備え、
上部分割部材４１ａと下部分割部材４１ｂとの間に連結
部材４０ｃを挟んで溶接により固着したものである。図
５（ｃ）は楕円形状の上部分割部材４２ａおよび下部分
割部材４２ｂと、連結部材４２ｃとを備え、上部分割部
材４２ａと下部分割部材４２ｂとの間に連結部材４０ｃ
を挟んで溶接により固着したものである。上記のアーム
１０のアーム本体１２の他の実施例も前記図２で説明し
たＵ字形状のものと同等の作用効果が得られる。このよ
うに、アーム１０は中立軸で上下分割される上下分割部
材４０ａ，４０ｂ，４１ａ，４１ｂ，４２ａ，４２ｂと
連結部材１２ｃにより溶接構成されるため、アーム１０
の断面形状は任意に設定することができるので、油圧シ
ョベルの作業機の形態に合わせた最適設計が可能とな
る。Next, another embodiment of the arm body 12 of the arm 10 will be described with reference to FIG. FIG. 5 is a cross section AA of FIG.
It is a figure equivalent to. FIG. 5A shows a substantially trapezoidal upper dividing member 40 a and lower dividing member 40 b, and a connecting member 40.
c, the upper split member 40a and the lower split member 40b
The connecting member 40c is sandwiched between and and fixed by welding. FIG. 5B includes a circular upper split member 41a and a lower split member 41b, and a connecting member 40c,
The connecting member 40c is sandwiched between the upper dividing member 41a and the lower dividing member 41b and fixed by welding. FIG. 5C includes an elliptical upper split member 42a, a lower split member 42b, and a connecting member 42c. The connecting member 40c is provided between the upper split member 42a and the lower split member 42b.
It is fixed by welding with a pinch in between. Other embodiments of the arm body 12 of the arm 10 described above can achieve the same effects as the U-shaped one described with reference to FIG. Thus, the arm 10 is welded to the upper and lower split members 40a, 40b, 41a, 41b, 42a, 42b, which are vertically split by the neutral axis, and the connecting member 12c.
Since the cross-sectional shape of the hydraulic excavator can be arbitrarily set, it is possible to perform the optimum design according to the form of the working machine of the hydraulic excavator.
【００２２】上記の実施例をアームについて説明した
が、アーム以外の作業機に適用できることは言うまでも
ない。また、本発明の要部を利用して油圧ショベル等の
建設機械の作業機の形状を適宜変更することが可能とな
る。Although the above embodiment has been described with respect to the arm, it goes without saying that it can be applied to a working machine other than the arm. Further, it is possible to appropriately change the shape of the working machine of the construction machine such as the hydraulic excavator by utilizing the main part of the present invention.
【００２３】[0023]
【発明の効果】以上説明したように、本発明の油圧ショ
ベルの作業機によれば、上下分割部材を連結部材を挟ん
で固着するので、上下分割部材の合わせ面に不整合が生
ぜず、良好な溶接品質が得られると共に、上下分割線と
直角な軸回りの曲げ外力に対しても連結部材により剛性
アップとなり上下分割部材の壁面の座屈強度を向上させ
ることができるので耐久性が向上する。As described above, according to the working machine of the hydraulic excavator of the present invention, since the upper and lower split members are fixed by sandwiching the connecting member, there is no misalignment between the mating surfaces of the upper and lower split members, which is favorable In addition to high welding quality, the connecting member increases the rigidity against the bending external force around the axis perpendicular to the upper and lower parting lines, and the buckling strength of the wall surface of the upper and lower parting members can be improved, thus improving the durability. .
【００２４】また、連結部材を使用することにより上下
分割部材を薄板鋼板で作業機を構成することが可能とな
り、経済性の向上および作業機の軽量化が図れる。Further, by using the connecting member, it is possible to construct the working machine by using the upper and lower split members made of thin steel plates, thereby improving the economical efficiency and reducing the weight of the working machine.
【図１】本発明に係る油圧ショベルのアーム側面図であ
る。FIG. 1 is a side view of an arm of a hydraulic excavator according to the present invention.
【図２】同、図１の断面Ａ−Ａ図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】同、図１の断面Ｂ−Ｂ図である。FIG. 3 is a sectional view taken along line BB of FIG.
【図４】同、図３の断面Ｃ−Ｃ図である。FIG. 4 is a sectional view taken along line C-C of FIG. 3.
【図５】同、（ａ），（ｂ），（ｃ）は図１の断面Ａ−
Ａに相当するアームの他の実施例説明図である。5 (a), (b), and (c) are sectional views A- of FIG.
It is another Example explanatory drawing of the arm corresponded to A.
【図６】油圧ショベルの側面図である。FIG. 6 is a side view of the excavator.
【図７】従来の油圧ショベルのアームを示す図である。FIG. 7 is a view showing an arm of a conventional hydraulic excavator.
【図８】図７の断面Ｄ−Ｄ図を示し、（ａ），（ｂ），
（ｃ）は従来のアーム断面の３例を説明する図である。8 is a sectional view taken along line D-D of FIG. 7, showing (a), (b),
(C) is a figure explaining three examples of the conventional arm cross section.
【図９】先行技術のブームを示す図である。FIG. 9 shows a prior art boom.
【図１０】図９の断面Ｅ−Ｅ図である。10 is a sectional view taken along line EE in FIG.
【図１１】図１０のＺ視図である。FIG. 11 is a Z view of FIG.
１０ アーム １２ アーム本体 １２ａ，４０ａ，４１ａ，４２ａ 上部分割部材 １２ｂ，４０ｂ，４１ｂ，４２ｂ 下部分割部材 １２ｃ 連結部材 １３，１４，１５ ボス部 １６，１７ ブラケット ２０ 油圧ショベル ２３ 上部旋回体 ３０ 作業機 ３１ ブーム ３３ アーム 10 arm 12 arm body 12a, 40a, 41a, 42a upper division member 12b, 40b, 41b, 42b lower division member 12c connecting member 13, 14, 15 boss portion 16, 17 bracket 20 hydraulic excavator 23 upper revolving body 30 working machine 31 Boom 33 arm
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 武士 大阪府枚方市上野３−１−１ 株式会社小 松製作所大阪工場内 (72)発明者 加藤 雅之 大阪府枚方市上野３−１−１ 株式会社小 松製作所大阪工場内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takeshi Kobayashi 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Osaka Plant (72) Masayuki Kato 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Osaka factory
Claims (3)
ームからなる作業機と、このブームおよびアームは長手
方向に上部分割部材と下部分割部材とを一体に形成され
たものからなる油圧ショベルの作業機において、前記ブ
ームあるいはアームの断面形状の一面に開口部を有する
上部分割部材(12a) および下部分割部材(12b) と、前記
上部分割部材(12a) と下部分割部材(12b) との間に挟ん
で固着した連結板(12c) とからなることを特徴とする油
圧ショベルの作業機。1. A working machine for a hydraulic excavator, which comprises a working machine including a boom and an arm that are sequentially connected from a vehicle body, and the boom and the arm integrally formed with an upper split member and a lower split member in a longitudinal direction. In the above, the upper split member (12a) and the lower split member (12b) each having an opening on one surface of the cross-sectional shape of the boom or arm are sandwiched between the upper split member (12a) and the lower split member (12b). A working machine for a hydraulic excavator, characterized in that it comprises a connecting plate (12c) that is fixed in place.
部材(12b) の形状は、Ｕ字状、台形状、半円形状および
半楕円形状としたことを特徴とする請求項１記載の油圧
ショベルの作業機。2. The hydraulic pressure according to claim 1, wherein the shape of the upper dividing member (12a) and the lower dividing member (12b) is U-shaped, trapezoidal, semi-circular and semi-elliptical. Excavator work machine.
と、前記上部分割部材(12a) および下部分割部材(12b)
の開口部の長さ(S1)とは、Ｓ2 ≧Ｓ1 としたことを特徴
とする請求項１記載の油圧ショベルの作業機。3. The length (S2) of the connecting plate (12c) in the width direction.
And the upper split member (12a) and the lower split member (12b)
The hydraulic excavator work machine according to claim 1, wherein the length (S1) of the opening is S2 ≥ S1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34764895A JPH09165773A (en) | 1995-12-15 | 1995-12-15 | Working machine for hydraulic backhoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34764895A JPH09165773A (en) | 1995-12-15 | 1995-12-15 | Working machine for hydraulic backhoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09165773A true JPH09165773A (en) | 1997-06-24 |
Family
ID=18391644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34764895A Pending JPH09165773A (en) | 1995-12-15 | 1995-12-15 | Working machine for hydraulic backhoe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09165773A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999004103A1 (en) * | 1997-07-15 | 1999-01-28 | Komatsu Ltd. | Boom of bucket excavators and method of manufacturing same |
| WO1999004104A1 (en) * | 1997-07-15 | 1999-01-28 | Komatsu Ltd. | Structure for working unit for bucket excavators and method for manufacturing the same |
| GB2362148A (en) * | 2000-05-10 | 2001-11-14 | Bamford Excavators Ltd | Machine having a working arm |
| EP1387012A2 (en) * | 2002-08-02 | 2004-02-04 | Kobelco Construction Machinery Co., Ltd. | Boom structure of construction machine and manufacturing method |
| JP2010189966A (en) * | 2009-02-19 | 2010-09-02 | Sanyo Kiki Co Ltd | Front working machine |
| JP2012031703A (en) * | 2010-08-03 | 2012-02-16 | Kobelco Contstruction Machinery Ltd | Box-shaped welded structure and power shovel |
| CN103953084A (en) * | 2014-04-14 | 2014-07-30 | 上海三一重机有限公司 | Lug plate structure with equal and colinear stress, and engineering machine |
| CN105804134A (en) * | 2016-05-12 | 2016-07-27 | 华若延 | Cantilever structure of construction machine and manufacturing method for cantilever structure |
| WO2017001287A1 (en) * | 2015-06-29 | 2017-01-05 | Caterpillar Sarl | Reinforcement structure for boom of work machine |
| JP6452878B1 (en) * | 2018-04-24 | 2019-01-16 | 株式会社神戸製鋼所 | Door beam |
-
1995
- 1995-12-15 JP JP34764895A patent/JPH09165773A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999004104A1 (en) * | 1997-07-15 | 1999-01-28 | Komatsu Ltd. | Structure for working unit for bucket excavators and method for manufacturing the same |
| GB2343173A (en) * | 1997-07-15 | 2000-05-03 | Komatsu Mfg Co Ltd | Structure for working unit for bucket excavators and method for manufacturing the same |
| GB2343174A (en) * | 1997-07-15 | 2000-05-03 | Komatsu Mfg Co Ltd | Boom of bucket excavators and method of manufacturing same |
| GB2343174B (en) * | 1997-07-15 | 2001-10-31 | Komatsu Mfg Co Ltd | Boom of bucket type excavator and producing method thereof |
| GB2343173B (en) * | 1997-07-15 | 2002-01-09 | Komatsu Mfg Co Ltd | Bucket type excavator arm or boom |
| US6637111B2 (en) | 1997-07-15 | 2003-10-28 | Komatsu Ltd. | Method for making a boom of an excavator |
| WO1999004103A1 (en) * | 1997-07-15 | 1999-01-28 | Komatsu Ltd. | Boom of bucket excavators and method of manufacturing same |
| US6699000B2 (en) | 2000-05-10 | 2004-03-02 | J. C. Bamford Excavators Limited | Machine having a working arm |
| GB2362148A (en) * | 2000-05-10 | 2001-11-14 | Bamford Excavators Ltd | Machine having a working arm |
| EP1387012A2 (en) * | 2002-08-02 | 2004-02-04 | Kobelco Construction Machinery Co., Ltd. | Boom structure of construction machine and manufacturing method |
| EP1387012A3 (en) * | 2002-08-02 | 2004-04-07 | Kobelco Construction Machinery Co., Ltd. | Boom structure of construction machine and manufacturing method |
| JP2010189966A (en) * | 2009-02-19 | 2010-09-02 | Sanyo Kiki Co Ltd | Front working machine |
| JP2012031703A (en) * | 2010-08-03 | 2012-02-16 | Kobelco Contstruction Machinery Ltd | Box-shaped welded structure and power shovel |
| CN103953084A (en) * | 2014-04-14 | 2014-07-30 | 上海三一重机有限公司 | Lug plate structure with equal and colinear stress, and engineering machine |
| WO2017001287A1 (en) * | 2015-06-29 | 2017-01-05 | Caterpillar Sarl | Reinforcement structure for boom of work machine |
| US10767340B2 (en) | 2015-06-29 | 2020-09-08 | Caterpillar Sarl | Reinforcement structure for boom of work machine |
| CN105804134A (en) * | 2016-05-12 | 2016-07-27 | 华若延 | Cantilever structure of construction machine and manufacturing method for cantilever structure |
| JP6452878B1 (en) * | 2018-04-24 | 2019-01-16 | 株式会社神戸製鋼所 | Door beam |
| JP2019189001A (en) * | 2018-04-24 | 2019-10-31 | 株式会社神戸製鋼所 | Door beam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103403263B (en) | Boom for construction machine | |
| WO2008018194A1 (en) | Boom | |
| US20040161326A1 (en) | Boom structure of construction machine and manufacturing method thereof | |
| KR100591423B1 (en) | Buckling of Bucket Excavator and Manufacturing Method Thereof | |
| JPH09165773A (en) | Working machine for hydraulic backhoe | |
| EP0993529B1 (en) | Box boom lift arm assembly | |
| JP2002120754A (en) | Vehicular frame structure | |
| JP3836683B2 (en) | Working arm structure of work machine | |
| JPH10121505A (en) | Working machine for hydraulic shovel | |
| US7556469B2 (en) | Revolving-frame structure of construction machinery | |
| JPH08282532A (en) | Frame for vehicle | |
| JP4124879B2 (en) | Chassis frame cross member | |
| JP2719469B2 (en) | Revolving structure main frame structure of construction machinery | |
| JP2004108019A (en) | Working arm of construction machine and its manufacturing method | |
| JP2001020311A (en) | Structural body using corner member, manufacture thereof, arm and work vehicle | |
| JP3585379B2 (en) | Revolving frame for construction machine and method of manufacturing the same | |
| CN209924002U (en) | Loader-digger | |
| JP2005144536A (en) | Method and apparatus for bending material of different thickness | |
| JPH0512373Y2 (en) | ||
| JP2003193512A (en) | Work machine and work machine boom of construction machine and manufacturing method therefor | |
| JP3904053B2 (en) | Steering support member mounting structure | |
| JPH11254178A (en) | Structure for providing welding strength | |
| JP4168835B2 (en) | Method of manufacturing beam-column joint structure and column-beam joint structure | |
| JP2666555B2 (en) | Ship double shell structure and construction method thereof | |
| JP2003336285A (en) | Frame of revolving superstructure for construction equipment |