JP3562945B2 - Hydraulic excavator working machine - Google Patents

Hydraulic excavator working machine Download PDF

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Publication number
JP3562945B2
JP3562945B2 JP31116397A JP31116397A JP3562945B2 JP 3562945 B2 JP3562945 B2 JP 3562945B2 JP 31116397 A JP31116397 A JP 31116397A JP 31116397 A JP31116397 A JP 31116397A JP 3562945 B2 JP3562945 B2 JP 3562945B2
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Japan
Prior art keywords
side plates
pin
pair
working machine
boom
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Expired - Fee Related
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JP31116397A
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Japanese (ja)
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JPH11131520A (en
Inventor
宏 下垣内
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Kobelco Construction Machinery Co Ltd
Kobe Steel Ltd
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Kobelco Construction Machinery Co Ltd
Kobe Steel Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/006Pivot joint assemblies
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; 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
    • E02F3/36Component parts
    • E02F3/38Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2264Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2271Actuators and supports therefor and protection therefor
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2264Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2275Hoses and supports therefor and protection therefor

Description

【0001】
【発明の属する技術分野】
本発明は、油圧ショベルなどの建設機械のフロント部にブーム、アーム、作業工具等の作業機構成部材を順次回動可能に連結して構成されている作業機の構造に関する。
【0002】
【従来の技術】
図13は、特開平4−5341号公報に記載されている一実施例ブーム16の平面図である。図14は、図13におけるブーム16の左右の側面板27L,27Rを示す斜視図である。図13及び図14に示す一実施例ブーム16では、左右一対の側面板27L,27Rを、その長手方向と直角方向の断面形状がコ字形なる鋼板にて形成し、その一対の側面板27L,27Rの上横板部29,29’のそれぞれ側端トと側端チを、間隔Lをおいて対向させ、前記一対の側面板27L,27Rを基端ボス20と先端ブラケット22を介し、溶着して構成している。それにより、図示していない従来より行われているブームの上面板と下面板を不要にすることができるので、ブーム16の重量を軽くすることができる。また前記側面板27L,27Rをプレス曲げ加工によりコ字形に形成するようにしたので、溶接加工を減少させて、ブームの製造コストを安価にすることができる。またブーム16の内部に油圧配管(図13,図14には図示していない)を通すようにしているので、ブーム16の外観上の見映えを良くするばかりでなく、前記油圧配管が他の障害物と接触して破損する事故を防止することができる。
【0003】
【発明が解決しようとする課題】
従来より油圧ショベルなど建設機械,作業車両のフロント部に装着されている作業機におけるブーム,アームは、母材(未溶接部材である鋼板,棒鋼などをいう)を箱形に溶接して形成している。前記ブーム,アームの溶接部の疲労強度は、前記母材に比べてかなり小さい。そのために前記溶接部に対しては、応力集中に起因するクラックなどの発生を防止する必要があった。すなわち前記溶接部を低応力にするために、前記溶接部の断面係数を前記部母材に比べて大きくしなければならなかった。したがって前記溶接部の溶接加工には大なる工数を要するので、強度上の点及びコストの面で非常に具合が悪かった。また特開平4−5341号公報に記載されているブームでは油圧配管をブーム内部に通すようにしているが、アームの外周面側には油圧配管が露出して取付けられている。本発明はブーム,アームを未溶接部材である母材で形成し、前記ブーム及びアームのそれぞれ内部を通して油圧配管を配置することのできる作業機の構造を提供することを目的とする。
【0004】
【課題を解決するための手段】
車体のフロント部に接続されたブーム、アーム等の建設機械の作業機構成部材において、前記作業機構成部材は、左右一対の側板と、前記左右一対の側板を所定の間隔を開けて保持する間隔保持部材と、前記左右一対の側板を前記間隔保持部材に当接させて固定する固定部材とを有し、前記固定部材は、左右一対の側板と前記間隔保持部材を溶接することなく固定した。これにより母材で形成される左右一対の側板を溶接等の手段を用いることなく固定できるため、溶接部に生じる応力集中に起因するクラックなどの発生を防止することができ、また溶接加工にかかる工数を削除或いは削減することができ、製造工程を簡略化することができ、生産性を向上できる。
【0005】
更に、前記間隔保持部材は前記左右一対の側板の間に介装されたスペーサボスであり、前記固定部材は前記側板に開穿されたピン穴と前記スペーサボスを挿通可能なピンであり、前記ピンにより前記左右一対の側板と前記スペーサボスを挿通するようにした。これにより、特別な構成を要さず、一般的なボスとピンにより側板間隔を保持して固定し作業機構成部材であるブームやアームを形成できるため、構造が簡略である。
【0006】
更に、前記ピンは、前記複数の作業機構成部材を連結する連結ピン、及び、前記作業機構成部材を回動させるアクチュエータを前記左右一対の側板間で軸支するアクチュエータ支持ピンであり、前記ピンの内少なくとも複数個のピンにより前記左右一対の側板を移動不能に固定できるようにした。これにより、通常の作業機の構成要素である、これらのピン及びボス等により作業機構成部材が構成できるため、不要な重量の増加を招くことなく、またより構成が簡略化できる。
【0007】
更に、前記左右一対の側板間に前記アクチュエータへの圧油を給排する油圧配管を配置したので、外観上の見映えを良くできるばかりでなく、油圧配管の他の障害物との接触が防止でき、また側板間の上下方向が開放されているため、油圧配管に対するメンテナンス性も良好である。
【0008】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて詳細に説明する。図1は、本発明の一実施形態の作業機1を示す側面図である。図において、2は油圧ショベルの上部旋回体(全体図を図示していない)のメインフレーム、3,4,5はそれぞれメインフレーム2に装着した作業機1を構成する作業機構成部材であるブーム,アーム,バケット、6はアイドラリンク、7はバケットリンク、8,9,10はそれぞれアクチュエータであるブームシリンダ,アームシリンダ,バケットシリンダ、11は上部旋回体側よりアームシリンダ9に通じる油圧配管、12は上部旋回体側よりバケットシリンダ10に通じる油圧配管、13はブーム3基礎部用のピン結合部、14はブームシリンダ8ロッド先端部用のピン結合部、15はブーム3先端部用(すなわちアーム4基部用でもある)のピン結合部、17はアームシリンダ9基端部用のピン結合部、18はアームシリンダ9ロッド先端部用のピン結合部、19はアーム4先端部用のピン結合部、21はバケットシリンダ10基端部用のピン結合部、23はアイドラリンク6基端部用のピン結合部である。図2は、図1における作業機1を示す平面図である。図において、24L,24Rはブーム3を形成する左右一対の側板、25L,25Rはアーム4を形成する左右一対の側板である。図3は、図1及び図2におけるブーム3の斜視図である。図において、26,26’は一対の側板24Lと24Rを貫通して開穿されたピン結合部13用のそれぞれピン穴、28,28’はピン結合部14用のそれぞれピン穴、30,30’はピン結合部15用のそれぞれピン穴、31,31’はピン結合部17用のそれぞれピン穴である。図4は、図1及び図2におけるアーム4の斜視図である。図において、32,32’は一対の側板25Lと25Rを貫通して開穿されたピン結合部15用のそれぞれピン穴、33,33’はピン結合部18用のそれぞれピン穴、34,34’はピン結合部19用のそれぞれピン穴、35,35’はピン結合部21用のそれぞれピン穴、36,36’はピン結合部23のそれぞれピン穴である。
【0007】
次に図5は、図1におけるピン結合部13のA−A矢視要部断面図である。図において、37はメインフレーム2のブーム3取付用ブラケット、37Pはブーム3取付用ブラケット37に対して溶着した補強パイプ、38はピン結合部13のピンである。図6は、図1におけるピン結合部14のB−B矢視要部断面図である。図において、39はピン結合14のピン、40はピン穴41を有し一対の側板24Lと24Rの相対応する内面側の間隙部に介挿されているスペーサボス、42,42’は左右のブームシリンダ8ロッド先端部の左右取付位置を設定する座板カラーである。図7は、図1におけるピン結合部15のC−C矢視要部断面図である。図において、43はピン結合部15のピン、44はピン穴45を有し側板25Lと25Rの内面側の間隙部に介挿されているスペーサボスである。図8は、図1におけるピン結合部17のD−D矢視要部断面図である。図において、46はピン結合部17のピン、47,47’はそれぞれピン穴48,48’を有し側板24L,24R内側面とアームシリンダ9基端部側面との互いに相対する対面間の間隙部にそれぞれ介挿したスペーサボスである。
【0008】
次に図9は、図1におけるピン結合部18のE−E矢視要部断面図である。図において、49はピン結合部18のピン、50,50’はそれぞれピン穴51,51’を有し側板25L,25R内側面とアームシリンダ9ロッド先端部側面との互いに相対する対面間の間隙部にそれぞれ介挿したスペーサボスである。図10は、図1におけるピン結合部19のF−F矢視要部断面図である。図において、52はピン結合部19のピン、53はピン穴54を有し側板25Lと25Rの内面側の間隙部に介挿されているスペーサボスである。図11は、図1におけるピン結合部21のG−G矢視要部断面図である。図において、55はピン結合部21のピン、56,56’はそれぞれピン穴57,57’を有し側板25L,25R内側面とバケットシリンダ10基端部側面との互いに相対する対面間の間隙部にそれぞれ介挿したスペーサボスである。図12は、図1におけるピン結合部23のH−H矢視要部断面図である。図において、58はピン結合部23のピン、59はピン穴60を有し一対の側板25Lと25Rの相対応する内面側の間隙部に介挿されているスペーサボス、61,61’は左右のアイドラリンク6,6の左右取付位置を設定する座板カラーである。
【0009】
次に、本発明の一実施形態の作業機1の構造を図1〜図12について述べる。本実施形態では、油圧ショベルの上部旋回体(図示していない)のメインフレーム2(図1に示す)のフロント部に順次回動自在に連結したブーム3、アーム4を、それぞれ左右一対の側板24L,24R、25L,25Rにて形成した。すなわちブーム3は図3に示すように一対の側板24Lと24Rで形成し、前記一対の側板24Lと24Rに、ピン38,39,43,46(図3では各ピンの中心線のみを図示している)をそれぞれ貫通する複数のピン穴26−26’、28−28’、30−30’、31−31’を開穿し、前記各ピン穴(符号を省略する)に対して前記各ピンをそれぞれ枢着することにより前記一対の側板24Lと24Rを位置決め固定するようにした。そして前記の場合に、図5に示すようにピン38を枢着するピン結合部13では、側板24Lと24Rの基端部をメインフレーム2のブラケット37に取付けている。また図6に示すようにピン39を枢着するピン結合部14では、側板24Lと24Rの相対応する内面側の間隙部に、ピン穴41にピン39を通したスペーサボス40を介挿している。また図7に示すようにピン43を枢着するピン結合部15では、アーム4の側板25Lと25Rの内面側の間隙部に、ピン穴45にピン43を通したスペーサボス44を介挿し、ブーム3の側板24L,24R先端部と、アーム4の側板25L,25R基部とを連結している。また図8に示すようにピン46を枢着するピン結合部17では、側板24L,24R内側面とアームシリンダ9基端部側面との互いに相対する対面間の間隙部に、ピン穴48,48’にピン46を通したスペーサボス48,48’をそれぞれ介挿し、前記アームシリンダ9基端部を取付けている。
【0010】
また図9に示すようにピン49を枢着するピン結合部18では、側板25L,25R内側面とアームシリンダ9ロッド先端部側面との互いに相対する対面間の間隙部に、ピン穴51,51’にピン49を通したスペーサボス50,50’をそれぞれ介挿し、前アームシリンダ9ロッド先端部を取付けている。また図10に示すようにピン52を枢着するピン結合部19では、側板25Lと25Rの内面側の間隙部に、ピン穴54にピン52を通したスペーサボス53を介挿し、アーム4の側板25L,25R先端部にバケット5を連結している。また図11に示すようにピン55を枢着するピン結合部21では、側板25L,25R内側面とバケットシリンダ10基端部側面との互いに相対する対面間の間隙部に、ピン穴57,57’にピン55を通したスペーサボス56,56’をそれぞれ介挿し、前記バケットシリンダ10基端部を取付けている。また図12に示すようにピン58を枢着するピン結合部23では、側板25Lと25Rの相対応する内面側の間隙部に、ピン穴60にピン58を通したスペーサボス59を介挿し、アイドラリンク6を取付けている。
【0011】
前記のようにブーム3及びアーム4をそれぞれ一対の側板24L,24R、25L,25Rで形成し、溶接加工,プレス曲げ加工を不要にしているので、前記ブーム3及びアーム4には、断面係数及び疲労強度の小さい溶接部と、曲げ角度が存在しない。したがってブーム3,アーム4の母材(鋼板をいう)の大なる強度を発揮できるとともに、クラック発生などのトラブルを防止することができる。そして、前記ブーム3,アーム4の構造が簡単であるので、作業機1の製作コストを大巾に低減することができる。
【0012】
また本実施形態では、ブーム3の側板24L,24Rの上面側周縁部(図3における符号イ,イ’で示す部分)と下面側周縁部(図3における符号ロ,ロ’で示す部分)、アーム4の側板25L,25Rの上面側周縁部(図4における符号ハ,ハ’で示す部分)と下面側周縁部(図4における符号ニ,ニ’で示す部分)のそれぞれ側面視形状を、直線と湾曲線とで連なる滑らかな曲線に形成し、前記ブームシリンダ8ロッド先端部のピン結合部14(ブームシリンダが単数の場合を含むが図示はしていない)、アームシリンダ9基端部のピン結合部17が前記側板24L,24Rの上面側周縁部イ,イ’、下面側周縁部ロ,ロ’より突出しないようにし、またバケットシリンダ10基端部のピン結合部21が前記側板25L,25Rの上面側周縁部ハ,ハ’下面側周縁部ニ,ニ’より突出しないようにした。それにより、前記アームシリンダ9,バケットシリンダ10の本体部分の一部分を前記側板24Lと24Rとの間,側板25Lと25Rとの間にそれぞれ収納された状態にすることができる。
【0013】
また本実施形態では、油圧ショベルの車体(図示していない上部旋回体をいう)より前記アームシリンダ9に通じる油圧配管11(図1に示す)をブーム3の側板24Lと24Rの内側に配管し、また前記車体よりバケットシリンダ10に通じる油圧配管12をブーム3の側板24Lと24Rの内側、アーム4の側板25Lと25Rの内側を通して配管した。それにより、ブーム3にアーム4を連接した作業機1全体の外観上の見映えを良くするばかりでなく、前記油圧配管11,12が他の障害物と接触して破損する事故を防止することができる。
【0014】
【発明の効果】
本発明では車体のフロント部に連結した作業機の作業機構成部材であるブーム,アームをそれぞれ左右一対の側板にて形成し、溶接加工,プレス曲げ加工を不要にしているので、前記ブーム,アームには、断面係数及び疲労強度の小さい溶接部と、曲げ角度が存在しない。したがってブーム,アームの母材(鋼板をいう)の大なる強度(耐疲労強度を含む)を発揮できるとともに、クラック発生などのトラブルを防止することができる。そして、前記ブーム,アームの構造が簡単であるので、作業機を軽量化できると共に、その生産性を大巾に向上することができる。また前記車体より前記油圧アクチュエータに通じる油圧配管を前記一対の側板の内側に配管したので、ブーム,アームを連接した作業機全体の外観上の見映えを良くするばかりでなく、前記複数の油圧配管が他の障害物と接触を防止することができる。
【図面の簡単な説明】
【図1】本発明の一実施形態の作業機を示す側面図である。
【図2】図1における作業機を示す平面図である。
【図3】図1及び図2におけるブームの斜視図である。
【図4】図1及び図2におけるアームの斜視図である。
【図5】図1におけるピン結合部のA−A矢視要部断面図である。
【図6】図1におけるピン結合部のB−B矢視要部断面図である。
【図7】図1におけるピン結合部のC−C矢視要部断面図である。
【図8】図1におけるピン結合部のD−D矢視要部断面図である。
【図9】図1におけるピン結合部のE−E矢視要部断面図である。
【図10】図1におけるピン結合部のF−F矢視要部断面図である。
【図11】図1におけるピン結合部のG−G矢視要部断面図である。
【図12】図1におけるピン結合部のH−H矢視要部断面図である。
【図13】従来技術の一実施例ブームの平面図である。
【図14】図13におけるブームの左右の側面板を示す斜視図である。
【符号の説明】
1 作業機
3,16 ブーム
4 アーム
8 ブームシリンダ
9 アームシリンダ
10 バケットシリンダ
11,12 油圧配管
13,〜,19,21,23 ピン結合部
24L,24R,25L,25R 側板
38,39,43,46,49,52,55,58 ピン
40,44,47,47’,50,50’,53,56,56’,59 スペーサボス
[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a structure of a working machine configured by sequentially connecting a working machine component such as a boom, an arm, and a working tool to a front portion of a construction machine such as a hydraulic shovel so as to be rotatable.
[0002]
[Prior art]
FIG. 13 is a plan view of an embodiment boom 16 described in Japanese Patent Application Laid-Open No. 4-5341. FIG. 14 is a perspective view showing left and right side plates 27L and 27R of the boom 16 in FIG. In the embodiment boom 16 shown in FIGS. 13 and 14, the pair of left and right side plates 27L and 27R are formed of a steel plate having a U-shaped cross section in a direction perpendicular to the longitudinal direction, and the pair of side plates 27L and 27R are formed. The upper and lower side plates 27, 29 'of 27R are opposed to each other at a distance L, and the pair of side plates 27L, 27R are welded to each other via a base boss 20 and a tip bracket 22. It is composed. This eliminates the need for a conventional boom upper plate and lower plate (not shown), so that the weight of the boom 16 can be reduced. In addition, since the side plates 27L and 27R are formed in a U-shape by press bending, welding can be reduced, and the manufacturing cost of the boom can be reduced. Further, since the hydraulic piping (not shown in FIGS. 13 and 14) is passed through the inside of the boom 16, not only does the appearance of the boom 16 look good, but also the hydraulic piping It is possible to prevent an accident that is broken by contact with an obstacle.
[0003]
[Problems to be solved by the invention]
Conventionally, a boom and an arm of a construction machine such as a hydraulic shovel and a working machine mounted on a front portion of a working vehicle are formed by welding a base material (referred to as a non-welded member such as a steel plate or a bar) into a box shape. ing. The fatigue strength of the welded portion between the boom and the arm is considerably smaller than that of the base metal. For this reason, it was necessary to prevent cracks and the like from occurring at the welded portion due to stress concentration. That is, in order to reduce the stress of the welded portion, the section modulus of the welded portion had to be made larger than that of the base metal. Therefore, the welding process of the welded portion requires a large number of man-hours, and is very poor in terms of strength and cost. Further, in the boom described in Japanese Patent Application Laid-Open No. 4-5341, the hydraulic piping is passed through the inside of the boom, but the hydraulic piping is exposed and attached to the outer peripheral surface side of the arm. SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure of a working machine in which a boom and an arm are formed of a base material which is an unwelded member, and a hydraulic pipe can be disposed inside each of the boom and the arm.
[0004]
[Means for Solving the Problems]
In a working machine component member of a construction machine such as a boom or an arm connected to a front portion of a vehicle body, the working machine component member includes a pair of left and right side plates and an interval for holding the pair of left and right side plates at a predetermined interval. A holding member and a fixing member for fixing the pair of left and right side plates in contact with the spacing member are provided, and the fixing member is fixed without welding the pair of left and right side plates and the spacing member. As a result, the pair of left and right side plates formed of the base material can be fixed without using means such as welding, so that it is possible to prevent the occurrence of cracks or the like due to the concentration of stress generated in the welded portion, and to perform welding. The number of steps can be eliminated or reduced, the manufacturing process can be simplified, and productivity can be improved.
[0005]
Further, the spacing member is a spacer boss interposed between the pair of left and right side plates, and the fixing member is a pin hole formed in the side plate and a pin that can pass through the spacer boss. A pair of left and right side plates and the spacer boss were inserted. Thus, without requiring a special configuration, it is possible to form the boom or the arm is a common boss and work machine component is fixed to hold the side plates interval by pin structure is simplified.
[0006]
Further, the pin is a connecting pin for connecting the plurality of working machine component members, and an actuator support pin for pivotally supporting an actuator for rotating the working machine component member between the pair of left and right side plates, The pair of left and right side plates can be immovably fixed by at least a plurality of pins. Thus, since the working machine components can be configured by the pins and the bosses, which are the components of a normal working machine, the configuration can be simplified without increasing unnecessary weight.
[0007]
Further, since the hydraulic pipe for supplying and discharging the pressure oil to and from the actuator is disposed between the pair of left and right side plates, not only can the appearance be improved, but also the hydraulic pipe can be prevented from contacting other obstacles. Also, since the vertical direction between the side plates is opened, the maintainability of the hydraulic piping is also good.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing a working machine 1 according to one embodiment of the present invention. In the drawing, reference numeral 2 denotes a main frame of an upper revolving superstructure (not shown) of a hydraulic shovel, and reference numerals 3, 4, and 5 denote booms, which are working machine components constituting the working machine 1 mounted on the main frame 2. , Arm, bucket, 6 is an idler link, 7 is a bucket link, 8, 9, and 10 are boom cylinders, arm cylinders, and bucket cylinders, each of which is an actuator, 11 is a hydraulic pipe from the upper revolving unit side to the arm cylinder 9, and 12 is a hydraulic pipe. Hydraulic piping leading from the upper revolving structure side to the bucket cylinder 10, 13 is a pin connecting portion for the boom 3 base portion, 14 is a pin connecting portion for the boom cylinder 8 rod tip portion, and 15 is a boom 3 tip portion (that is, the arm 4 base portion). 17 is a pin connecting portion for the base end of the arm cylinder 9, and 18 is a pin connecting portion for the arm cylinder 9. 19 is a pin connection for the tip of the arm 4, 21 is a pin connection for the base end of the bucket cylinder 10, and 23 is a pin connection for the base end of the idler link 6. . FIG. 2 is a plan view showing the working machine 1 in FIG. In the figure, reference numerals 24L and 24R denote a pair of left and right side plates forming the boom 3, and reference numerals 25L and 25R denote a pair of left and right side plates forming the arm 4. FIG. 3 is a perspective view of the boom 3 in FIG. 1 and FIG. In the figure, reference numerals 26 and 26 'denote pin holes for the pin connecting portion 13 which are formed by penetrating the pair of side plates 24L and 24R, 28 and 28' denote respective pin holes for the pin connecting portion 14, and 30 and 30. 'Denotes a pin hole for the pin connecting portion 15, and 31 and 31' denote respective pin holes for the pin connecting portion 17. FIG. 4 is a perspective view of the arm 4 in FIG. 1 and FIG. In the figure, 32 and 32 'are pin holes for the pin connecting portion 15 which are formed by penetrating the pair of side plates 25L and 25R, 33 and 33' are respective pin holes for the pin connecting portion 18, and 34 and 34. 'Is a pin hole for the pin connecting portion 19, 35 and 35' are pin holes for the pin connecting portion 21, and 36 and 36 'are pin holes for the pin connecting portion 23, respectively.
[0007]
Next, FIG. 5 is a cross-sectional view of a main part of the pin connecting part 13 in FIG. In the figure, reference numeral 37 denotes a boom 3 mounting bracket of the main frame 2, 37P denotes a reinforcing pipe welded to the boom 3 mounting bracket 37, and 38 denotes a pin of the pin connecting portion 13. FIG. 6 is a cross-sectional view of a main part of the pin connecting part 14 in FIG. In the figure, reference numeral 39 denotes a pin of the pin connection 14, reference numeral 40 denotes a spacer boss having a pin hole 41 and inserted into a corresponding gap on the inner surface side of the pair of side plates 24L and 24R, and reference numerals 42 and 42 'denote left and right booms. This is a seat plate collar for setting the left and right mounting positions of the tip of the cylinder 8 rod. FIG. 7 is a cross-sectional view of a principal part of the pin connecting part 15 in FIG. In the figure, reference numeral 43 denotes a pin of the pin connecting portion 15, and reference numeral 44 denotes a spacer boss having a pin hole 45 and inserted into a gap between the inner surfaces of the side plates 25L and 25R. FIG. 8 is a cross-sectional view of a main part of the pin connecting part 17 in FIG. In the drawing, reference numeral 46 denotes a pin of the pin connecting portion 17, and 47 and 47 'each have a pin hole 48 and 48', respectively, and have a gap between the facing surfaces of the inner side surfaces of the side plates 24L and 24R and the base end surface of the arm cylinder 9. It is a spacer boss inserted in each part.
[0008]
Next, FIG. 9 is a cross-sectional view of a main part of the pin connecting portion 18 in FIG. In the drawing, reference numeral 49 denotes a pin of the pin connecting portion 18, and 50 and 50 'each have a pin hole 51 and 51', respectively, and have a gap between the facing surfaces of the inner side surfaces of the side plates 25L and 25R and the rod cylinder end surface. It is a spacer boss inserted in each part. FIG. 10 is a cross-sectional view of a main part of the pin connecting portion 19 in FIG. In the drawing, reference numeral 52 denotes a pin of the pin connecting portion 19, and reference numeral 53 denotes a spacer boss having a pin hole 54 and inserted into the gap between the inner surfaces of the side plates 25L and 25R. FIG. 11 is a cross-sectional view of a main part of the pin connecting part 21 in FIG. In the figure, reference numeral 55 denotes a pin of the pin connecting portion 21, and 56 and 56 'each have a pin hole 57 and 57', respectively, and have a gap between opposing facing surfaces between the inner side surfaces of the side plates 25L and 25R and the base end side surface of the bucket cylinder 10. It is a spacer boss inserted in each part. FIG. 12 is a cross-sectional view of a main part of the pin connecting part 23 in FIG. In the drawing, 58 is a pin of the pin connecting portion 23, 59 is a spacer boss having a pin hole 60 and inserted into a corresponding gap between the inner surfaces of the pair of side plates 25L and 25R, and 61 and 61 'are left and right. A seat plate collar for setting the left and right mounting positions of the idler links 6, 6.
[0009]
Next, the structure of the working machine 1 according to one embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a boom 3 and an arm 4 which are sequentially and rotatably connected to a front portion of a main frame 2 (shown in FIG. 1) of an upper swing body (not shown) of a hydraulic shovel are respectively connected to a pair of left and right side plates. Formed with 24L, 24R, 25L, 25R. That is, the boom 3 is formed by a pair of side plates 24L and 24R as shown in FIG. 3, and the pair of side plates 24L and 24R are provided with pins 38, 39, 43 and 46 (only the center line of each pin is shown in FIG. 3). ), And a plurality of pin holes 26-26 ', 28-28', 30-30 ', 31-31' penetrating through each of the pin holes (the symbols are omitted). The pair of side plates 24L and 24R are positioned and fixed by pivotally attaching the pins. In the above case, as shown in FIG. 5, in the pin connecting portion 13 for pivotally connecting the pin 38, the base ends of the side plates 24L and 24R are attached to the bracket 37 of the main frame 2. As shown in FIG. 6, in the pin connecting portion 14 to which the pin 39 is pivotally mounted, a spacer boss 40 having the pin 39 passed through the pin hole 41 is inserted into the corresponding gap between the inner surfaces of the side plates 24L and 24R. . Also, as shown in FIG. 7, in the pin connecting portion 15 for pivotally mounting the pin 43, a spacer boss 44 having the pin 43 passed through the pin hole 45 is inserted into the gap between the inner surfaces of the side plates 25L and 25R of the arm 4 so that the boom 3 and the bases of the side plates 25L, 25R of the arm 4 are connected. Also, as shown in FIG. 8, in the pin connecting portion 17 for pivotally mounting the pin 46, pin holes 48, 48 are formed in the gaps between the opposing surfaces of the inner surfaces of the side plates 24L, 24R and the base end surface of the arm cylinder 9. The spacer cylinder bosses 48 and 48 'through which the pins 46 are inserted are inserted into the arm cylinder 9 and the base end of the arm cylinder 9 is attached.
[0010]
Further, as shown in FIG. 9, in the pin connecting portion 18 for pivotally mounting the pin 49, a pin hole 51, 51 is formed in a gap between opposing surfaces of the inner surfaces of the side plates 25L, 25R and the rod cylinder end surface. The spacer bosses 50 and 50 ′ are inserted through the pins 49 ′, respectively, and the tip of the rod of the forearm cylinder 9 is attached. Further, as shown in FIG. 10, in the pin connecting portion 19 for pivotally attaching the pin 52, a spacer boss 53 having the pin 52 passed through the pin hole 54 is inserted into the gap between the inner surfaces of the side plates 25L and 25R. The bucket 5 is connected to the tip of the 25L, 25R. Further, as shown in FIG. 11, in the pin connecting portion 21 to which the pin 55 is pivotally mounted, pin holes 57, 57 are formed in gaps between the opposing surfaces of the inner surfaces of the side plates 25L, 25R and the base end surface of the bucket cylinder 10. The spacer bosses 56 and 56 ′ are inserted through the pins 55 ′, respectively, and the base end of the bucket cylinder 10 is attached. Also, as shown in FIG. 12, in the pin connecting portion 23 for pivotally mounting the pin 58, a spacer boss 59 having the pin 58 passed through the pin hole 60 is inserted into the corresponding gap between the inner surfaces of the side plates 25L and 25R. The link 6 is attached.
[0011]
As described above, the boom 3 and the arm 4 are formed by the pair of side plates 24L, 24R, 25L, and 25R, respectively, so that welding and press bending are not required. Welds with low fatigue strength and no bending angles. Therefore, a large strength of the base material (referred to as a steel plate) of the boom 3 and the arm 4 can be exhibited, and troubles such as cracks can be prevented. Since the structures of the boom 3 and the arm 4 are simple, the manufacturing cost of the working machine 1 can be greatly reduced.
[0012]
Further, in the present embodiment, the upper surface side peripheral portions of the side plates 24L and 24R of the boom 3 (portions indicated by reference numerals A and A ′) and the lower surface side peripheral portions (portions indicated by reference characters B and B ′ in FIG. 3), The side peripheral shapes of the upper surface side peripheral portions (the portions indicated by reference numerals C and C ′ in FIG. 4) and the lower surface side peripheral portions (portions indicated by the reference characters D and D ′ in FIG. 4) of the side plates 25L and 25R of the arm 4 are as follows. The boom cylinder 8 is formed into a smooth curved line that is continuous with a straight line and a curved line, and the pin connecting portion 14 (including a single boom cylinder, not shown) of the rod end of the boom cylinder 8 and the base end of the arm cylinder 9 The pin connecting portion 17 is prevented from protruding from the upper peripheral portions A and B 'and the lower peripheral portions B and B' of the side plates 24L and 24R, and the pin connecting portion 21 at the base end of the bucket cylinder 10 is connected to the side plate 25L. , 25R upper peripheral edge c C 'lower surface side peripheral edge portion D, D' and does not project from. Thereby, a part of the main body of the arm cylinder 9 and the bucket cylinder 10 can be housed between the side plates 24L and 24R and between the side plates 25L and 25R, respectively.
[0013]
Further, in the present embodiment, a hydraulic pipe 11 (shown in FIG. 1) that leads from the vehicle body of the hydraulic excavator (refers to an upper revolving structure not shown) to the arm cylinder 9 is provided inside the side plates 24L and 24R of the boom 3. Also, a hydraulic pipe 12 leading from the vehicle body to the bucket cylinder 10 is provided inside the side plates 24L and 24R of the boom 3 and inside the side plates 25L and 25R of the arm 4. This not only improves the appearance of the entire work machine 1 in which the arm 4 is connected to the boom 3 but also prevents the hydraulic pipes 11 and 12 from being damaged by contact with other obstacles. Can be.
[0014]
【The invention's effect】
In the present invention, the boom and the arm, which are the working machine component members of the working machine connected to the front portion of the vehicle body, are formed by a pair of left and right side plates, and welding and press bending are not required. Does not have a welded portion having a small section modulus and fatigue strength and no bending angle. Therefore, a large strength (including fatigue resistance) of the base material (referred to as a steel plate) of the boom and the arm can be exhibited, and troubles such as cracks can be prevented. Since the structure of the boom and the arm is simple, the weight of the working machine can be reduced, and the productivity can be greatly improved. In addition, since hydraulic piping from the vehicle body to the hydraulic actuator is provided inside the pair of side plates, not only the external appearance of the entire working machine in which the boom and the arm are connected is improved, but also the plurality of hydraulic pipings are provided. Can prevent contact with other obstacles.
[Brief description of the drawings]
FIG. 1 is a side view showing a working machine according to an embodiment of the present invention.
FIG. 2 is a plan view showing the working machine in FIG.
FIG. 3 is a perspective view of the boom in FIGS. 1 and 2;
FIG. 4 is a perspective view of an arm in FIGS. 1 and 2;
FIG. 5 is a cross-sectional view of a main portion of the pin connecting portion taken along line AA in FIG. 1;
FIG. 6 is a cross-sectional view of a main part of the pin connecting part taken along the line BB in FIG. 1;
FIG. 7 is a cross-sectional view of a principal part of the pin coupling part taken along the line CC in FIG. 1;
FIG. 8 is a cross-sectional view of a main part of the pin connecting portion taken along the line DD in FIG. 1;
FIG. 9 is a cross-sectional view of a main part of the pin connecting part taken along the line EE in FIG. 1;
FIG. 10 is a cross-sectional view of a main part of the pin connecting part taken along line FF in FIG. 1;
FIG. 11 is a cross-sectional view of a main part of the pin coupling part taken along line GG in FIG. 1;
FIG. 12 is a cross-sectional view of a main portion of the pin connecting portion taken along the line HH in FIG. 1;
FIG. 13 is a plan view of a boom according to a related art.
FIG. 14 is a perspective view showing left and right side plates of the boom in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Working machine 3, 16 Boom 4 Arm 8 Boom cylinder 9 Arm cylinder 10 Bucket cylinder 11, 12 Hydraulic piping 13, ..., 19, 21, 23 Pin connection part 24L, 24R, 25L, 25R Side plate 38, 39, 43, 46 , 49, 52, 55, 58 Pins 40, 44, 47, 47 ', 50, 50', 53, 56, 56 ', 59 Spacer boss

Claims (3)

車体のフロント部に接続されたブーム、アーム等の油圧ショベルの作業機において、
前記作業機は、
左右一対の側板と、
前記左右一対の側板を所定の間隔を開けて保持する間隔保持部材と、
前記左右一対の側板を前記間隔保持部材に当接させて固定する固定部材とを含んだ作業機 構成部材により構成され、
前記左右一対の側板間は上下方向が開放されるとともに、前記左右一対の側板間に油圧配 管を配置し、
前記固定部材は前記左右一対の側板と前記間隔保持部材を溶接することなく固定することを特徴とする油圧ショベルの作業機。
In hydraulic excavator working machines such as booms and arms connected to the front part of the vehicle body,
The working machine is
A pair of left and right side plates,
An interval holding member that holds the pair of left and right side plates at a predetermined interval,
Is constituted by a work machine components including a fixing member for fixing by contact with the pair of right and left side plates to the spacing members,
Said between the left and right pair of side plates with the vertical direction is released, placing hydraulic piping between the pair of left and right side plates,
The fixing member working machine of a hydraulic excavator, which comprises fixed without welding the said spacing member and said pair of right and left side plates.
前記間隔保持部材は前記左右一対の側板の間に介装されたスペーサボスであり、前記固定部材は前記側板に開穿されたピン穴と前記スペーサボスを挿通可能なピンであり、前記ピンにより前記左右一対の側板と前記スペーサボスを挿通するようにしたことを特徴する請求項1記載の油圧ショベルの作業機。The spacing member is a spacer boss interposed between the pair of left and right side plates, and the fixing member is a pin hole formed in the side plate and a pin that can be inserted through the spacer boss. The working machine of a hydraulic shovel according to claim 1, wherein the side boss and the spacer boss are inserted. 前記ピンは、前記複数の作業機構成部材を連結するピン、及び、前記作業機構成部材を回動させるアクチュエータを前記左右一対の側板間で軸支するピンであり、前記ピンの内少なくとも複数個のピンにより前記左右一対の側板のそれぞれが相対的 移動不能に固定できるようにしたことを特徴とする請求項2記載の油圧ショベルの作業機。The pin is a pin for connecting the plurality of working machine component members, and a pin for pivotally supporting an actuator for rotating the working machine component member between the pair of left and right side plates, and at least a plurality of the pins. working machine of the hydraulic excavator according to claim 2, wherein each of the pair of left and right side plates by pins is characterized in that to allow immovably fixed relative.
JP31116397A 1997-10-27 1997-10-27 Hydraulic excavator working machine Expired - Fee Related JP3562945B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31116397A JP3562945B2 (en) 1997-10-27 1997-10-27 Hydraulic excavator working machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31116397A JP3562945B2 (en) 1997-10-27 1997-10-27 Hydraulic excavator working machine

Publications (2)

Publication Number Publication Date
JPH11131520A JPH11131520A (en) 1999-05-18
JP3562945B2 true JP3562945B2 (en) 2004-09-08

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6684537B2 (en) * 2001-05-28 2004-02-03 Kubota Corporation Excavator with a piping structure for absorbing variations in hose length
JP5397322B2 (en) * 2010-06-10 2014-01-22 コベルコ建機株式会社 Work attachments and construction machinery
JP2016069978A (en) * 2014-09-30 2016-05-09 日立建機株式会社 Work device
CN107190794B (en) * 2017-07-21 2022-07-12 长沙航空职业技术学院 Excavator movable arm and bucket rod assembly and assembling method

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