JPH02229327A - Backhoe type working device - Google Patents
Backhoe type working deviceInfo
- Publication number
- JPH02229327A JPH02229327A JP4943989A JP4943989A JPH02229327A JP H02229327 A JPH02229327 A JP H02229327A JP 4943989 A JP4943989 A JP 4943989A JP 4943989 A JP4943989 A JP 4943989A JP H02229327 A JPH02229327 A JP H02229327A
- Authority
- JP
- Japan
- Prior art keywords
- boom
- arm
- webs
- web
- working device
- 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.)
- Granted
Links
- 238000005192 partition Methods 0.000 abstract description 11
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 239000004576 sand Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- E02F3/38—Cantilever 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/006—Pivot joint assemblies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Shovels (AREA)
Abstract
Description
〔産業上の利用分野〕
本発明は、例えば油圧ショベル等の建設機械に用いられ
るバックホウ式作業装置に関し、特に、ブーム等の形状
を簡素化でき、軽量化を図りつるようにしたバックホウ
式作業装置に関する．[Industrial Field of Application] The present invention relates to a backhoe-type working device used for construction machinery such as a hydraulic excavator, and in particular to a backhoe-type working device that can simplify the shape of the boom, etc., and is lightweight and slanted. Regarding.
第５図および第６図に従来技術のバックホウ式作業装置
として油圧ショベルを例に挙げて示す。
図に右いて、１は下部走行体、２は該下部走行体１上に
旋回可能に搭載された上部旋回体を示し、該上部旋回体
２は旋回フレーム２Ａ上に運転室２Ｂ，機械室２０等が
設けられ、作業機本体を構成するようになっている．３
は上部旋回体２の旋回フレーム２Ａ前部に設けられたバ
ックホウ式作業装置を示し、該作業装置３は旋回フレー
ム２Ａの前部中央に俯仰動可能にピン結合されたブーム
４と、該ブーム４の先端側に俯仰動可能にピン結合され
たアーム５と、該アーム５の先端側に回動可能にピン結
合されたバックホウバケット６と、これらを作動させる
ブームシリンダ７，アームシリンダ８およびパケットシ
リンダ９とから大略構成されている．
ここで、該作業装置３のブーム４は第６図に示す如く、
左．右のウェブ４Ａ，４Ａと、該各ウェブ４Ａの上端面
に溶接された上フランジ（図示せず）と、各ウェブ４Ａ
の下端面に溶接された下フランジ４Ｂとから大略構成さ
れ、ボックス形状をなす中空部材として形成されている
．また、各ウェブ４Ａにはブーム４の先端側に位置して
左，右に張出す張出し部４ Ａ ｒ ， ４ Ａ ＋が
曲げ加工によって形成され、該各張出し部４Ａ．間の寸
法Ｌは各ウェブ４Ａの他の部分間の寸法βよりも大とな
っている（Ｉ２＜Ｌ）．そして、該各ウェブ４Ａ間には
各張出し部４ Ａ ｌの先端側に位置して長方形の補強
用仕切板４Ｃが設けられ、該仕切板４ｃは各ウェブ４Ａ
，上フランジおよび下フランジ４Ｂにそれぞれ溶接され
ている．
また、アーム５は第６図に示す如く、左，右のウェブ５
Ａ，５Ａと、該各ウェブ５Ａの上，下両端面に溶接され
た上フランジ（図示せず）、下フランジ５Ｂとから大略
構成され、該アーム５も各ウェブ５Ａと上．下のフラン
ジ５Ｂ等とによってボックス形状をなす中空部材として
形成されている．
１０．１０はブーム４の先端に設けられたブラケットを
示し、該各ブラケットｌＯは各ウェブ４Ａの張出し部４
Ａ．先端に溶接されると共に、上フランジおよび下フラ
ンジ４Ｂの先端にも溶接によって固着され、後述する連
結ピンｌ２の軸方向に前記寸法Ｌ程度離間している．１
１はアーム５の基端側に設けられたボス部を示し、該ボ
ス部１ｌは軸方向両端側がアーム５の各ウェブ５Ａおよ
び下フランジ５Ｂに溶接等の手段を用いて固着され、ブ
ーム４の各ブラケット１ｏ間に挿入されている．１２は
各ブラケットｌＯとボス部１ｌとの間を連結した連結ピ
ンを示し、該連結ピンｌ２は各ブラケット１０のピン穴
１０Ａおよびボス部１１のピン穴１１Ａに挿通され、ブ
ーム４とアーム５との間を回動可能にピン結合するよう
になっている．さらに、１３は連結ピンｌ２を抜止した
抜止めピンである．
従来技術による油圧シ目ベル用作業装置３は上述の如く
構成されるもので、土砂等の掘削作業時にはブームシリ
ンダ７．アームシリンダ８によってブーム４，アーム５
をそれぞれ俯仰動させつつ、パケットシリンダ９によっ
てバックホウバケット６を回動させ、該パケット９によ
り土砂等を掘削する．そして、掘削後の土砂は該パケッ
ト９内に積荷（収容）した状態で（第５図参照）、再び
ブーム４，アーム５およびパケット９を適宜に回動させ
つつ、上部旋回体２を旋回させて、所望の場所に排土す
る．
ところで、上述した従来技術では、ブーム４の先端側に
ブラケット１０．１０を設け、アーム５の基端側にボス
部ｌ１を設け、該ボス部１１を各ブラケットｌＯ間に挿
入して、これらを連結ピン１２により回動可能に連結し
ているから、ブーム４の各ウェブ４Ａには先端側で各ブ
ラケット１０を支持すべく、左．右の張出し部４Ａ＋
，４Ａ＋を曲げ加工によって形成する必要があり、形状
が複雑化し、製造コストが高くなる上に、上フランジ、
下フランジ４Ｂも各張出し部４ Ａ Ｉに対応して幅広
に形成する必要があり、材料費が嵩み、ブーム４全体の
重量も大きくなるという欠点がある．
また、各ブラケット１０間の離間寸法も各張出し部４Ａ
．間の寸法Ｌに対応して大となり、該各ブラケット１０
によって１本の連結ピン２の両端側を支持するから、該
連結ピンｌ２を長尺に形成する必要がある上に、該連結
ピンｌ２によって実質的にアーム５およびパケット６等
を支持するから、連結ピン１２を大径に形成して強度を
アップする必要が生じ、連結ピンｌ２の重量が大となる
。特に大型の油圧ショベルでは数１００ｋｇから数ｔｏ
ｎに及ぶ連結ピン１２を用いる必要が生じている。
このため、現場作業等で連結ピン１２を交換する場合に
は、大重量の連結ピンｌ２を運搬してクレーン等を用い
て各ピン穴１０Ａ，ＩＩＡ内に挿入する必要があり，交
換時の作業性，サービス性が非常に悪いという欠点があ
る。さらに，上記理由によって作業装置３全体の重量も
大となり、ブームシリンダ７．アームシリンダ８，パケ
ットシリンダ９等を大型化しなければならず、パケット
６による土砂等の積荷量を増大させるのが難し《、作業
性能（フロント性能）を向上できないという欠点がある
．
本発明は上述した従来技術の欠点に鑑みなされたもので
、本発明はブームの形状を簡素化でき、全体の重量を軽
減できる上に、連結ピンを交換する時の作業性やサービ
ス性を向上できるようにしたバックホウ式作業装置を提
供するものである．FIGS. 5 and 6 show a hydraulic excavator as an example of a conventional backhoe type working device. On the right side of the figure, 1 indicates a lower traveling body, and 2 indicates an upper rotating body rotatably mounted on the lower traveling body 1. The upper rotating body 2 has a driver's cab 2B, a machine room 20, etc. are provided to make up the main body of the work machine. 3
2 shows a backhoe-type working device installed in the front part of the revolving frame 2A of the upper revolving structure 2, and the working device 3 includes a boom 4 connected with a pin to the center of the front part of the revolving frame 2A so as to be movable up and down, and the boom 4. an arm 5 pin-coupled to the tip side of the arm 5 so as to be movable up and down; a backhoe bucket 6 pin-coupled rotatably to the tip side of the arm 5; a boom cylinder 7, an arm cylinder 8, and a packet cylinder for operating these. It is roughly composed of 9. Here, the boom 4 of the working device 3 is as shown in FIG.
left. Right webs 4A, 4A, an upper flange (not shown) welded to the upper end surface of each web 4A, and each web 4A
The lower flange 4B is welded to the lower end surface of the lower flange 4B. Moreover, overhanging portions 4 A r , 4 A + located on the tip end side of the boom 4 and extending to the left and right are formed on each web 4A by bending, and each of the overhanging portions 4A. The dimension L between them is larger than the dimension β between other parts of each web 4A (I2<L). A rectangular reinforcing partition plate 4C is provided between each of the webs 4A at the tip side of each overhang 4A, and the partition plate 4c is provided between each web 4A.
, are welded to the upper flange and lower flange 4B, respectively. In addition, the arm 5 has left and right webs 5 as shown in FIG.
A, 5A, an upper flange (not shown) and a lower flange 5B welded to both upper and lower end surfaces of each web 5A, and the arm 5 also includes each web 5A and an upper flange 5B. It is formed as a box-shaped hollow member with the lower flange 5B, etc. 10.10 indicates a bracket provided at the tip of the boom 4, and each bracket lO is connected to the overhanging portion 4 of each web 4A.
A. It is welded to the tip and is also fixed by welding to the tips of the upper flange and lower flange 4B, and is spaced about the above-mentioned dimension L in the axial direction of the connecting pin l2, which will be described later. 1
Reference numeral 1 designates a boss portion provided on the base end side of the arm 5. Both axial ends of the boss portion 1l are fixed to each web 5A and lower flange 5B of the arm 5 by means such as welding. It is inserted between each bracket 1o. Reference numeral 12 indicates a connecting pin that connects each bracket lO and the boss portion 1l, and the connecting pin l2 is inserted into the pin hole 10A of each bracket 10 and the pin hole 11A of the boss portion 11, and connects the boom 4 and the arm 5. They are connected with a pin so that they can rotate. Furthermore, 13 is a retaining pin that prevents the connecting pin l2 from being removed. The hydraulic bell operating device 3 according to the prior art is constructed as described above, and during excavation work such as earth and sand, the boom cylinder 7. Boom 4, arm 5 by arm cylinder 8
The backhoe bucket 6 is rotated by the packet cylinder 9 while the backhoe bucket 6 is raised and lowered, and earth and sand etc. are excavated by the packet 9. Then, with the excavated earth and sand loaded (accommodated) in the packet 9 (see Fig. 5), the upper revolving body 2 is rotated again while appropriately rotating the boom 4, arm 5, and packet 9. and discharge the soil to the desired location. By the way, in the above-mentioned conventional technology, the bracket 10.10 is provided on the distal end side of the boom 4, the boss portion l1 is provided on the proximal end side of the arm 5, and the boss portion 11 is inserted between each bracket lO to connect these. Since the boom 4 is rotatably connected by the connecting pin 12, each web 4A of the boom 4 has a left side. Right overhang 4A+
, 4A+ must be formed by bending, which complicates the shape and increases manufacturing costs.
The lower flange 4B also needs to be made wide to correspond to each of the overhanging parts 4A, which has the disadvantage of increasing material costs and increasing the weight of the boom 4 as a whole. In addition, the distance between each bracket 10 is also determined by each overhanging portion 4A.
．． The size of each bracket 10 increases correspondingly to the dimension L between the brackets 10 and 10.
Since both ends of one connecting pin 2 are supported by the connecting pin 2, it is necessary to form the connecting pin l2 into a long length, and the arm 5, the packet 6, etc. are substantially supported by the connecting pin l2. It becomes necessary to increase the strength by forming the connecting pin 12 with a large diameter, and the weight of the connecting pin l2 increases. Especially for large hydraulic excavators, the weight ranges from several 100 kg to several to
It is now necessary to use n number of connecting pins 12. Therefore, when replacing the connecting pin 12 during field work, etc., it is necessary to transport the heavy connecting pin l2 and insert it into each pin hole 10A, IIA using a crane, etc. The disadvantage is that the performance and service quality are very poor. Furthermore, due to the above-mentioned reasons, the weight of the entire working device 3 also increases, and the boom cylinder 7. It is necessary to increase the size of the arm cylinder 8, packet cylinder 9, etc., making it difficult to increase the amount of dirt and sand loaded by the packet 6, and has the disadvantage that work performance (front performance) cannot be improved. The present invention was developed in view of the above-mentioned drawbacks of the prior art.The present invention simplifies the shape of the boom, reduces the overall weight, and improves workability and serviceability when replacing connecting pins. The purpose is to provide a backhoe-type work device that makes it possible to
上述した課題を解決するために本発明が採用する構成の
特徴は、ブームを左，右のウェブが先端側へと互いに平
行に延びるように形成し、該各ウェブの先端およびブー
ムの上，下のフランジ先端には左，右一対のボス部を設
け、該各ボス部を左，右一対の連結ピンを介してアーム
に連結したことにある．
また、前記アームには少な《とも左，右のウェブを平行
に延ばすことによって左．右一対の二又状ブラケットを
形成し、該各二又状ブラケットに前記ブームの各ボス部
を挿入して、前記各連結ピンの両端側を各二又状ブラケ
ットによって支持するようにするのが好ましい。
〔作用〕
上記構成により、ブームの先端側で左，右のウェブに曲
げ加工等を施す必要がなくなり、形状を単純化できる上
に、各ウェブの先端側に一対のボス部を設けて、該各ボ
ス部をアームに一対（２本）の連結ピンで連結するから
、該各連結ピンを短尺でかつ小径に形成でき、強度を向
上できる．また、アームの各ウェブを平行に延ばすこと
によって一対の二又状ブラケットを形成すれば、アーム
の形状が複雑になるのを防止でき、各二又状ブラケット
によって各連結ピンを両持ち支持できる．
〔実施例】
以下、本発明の実施例を第１図ないし第４図に基づいて
説明する．なお、実施例では前述した第５図に示す従来
技術と同一の構成要素に同一の符合を付し、その説明を
省略するものとする。
図中、２１は上部旋回体２の旋回フレーム２Ａに設けら
れたバックホウ式の作業装置を示し、該作業装置２ｌは
従来技術で述べた作業装置３とほぼ同様に、ブーム２２
，アーム２３，バックホウバケット２４．ブームシリン
ダ２５，アームシリンダ２６およびパケットシリンダ２
７によって大略構成されている。そして、該作業装置２
１のブーム２２は第２図ないし第４図に示す如く、左，
右のウェブ２２Ａ，２２Ａおよび上，下フランジ２２Ｂ
，２２Ｃからボックス形状をなす中空部材として形成さ
れるものの、該ブーム２２の各ウェブ２２Ａはブーム２
２の長さ方向中間部から先端側に亘って互いに平行に延
びるように形成され、その離間寸法２，は従来技術で述
べた核ウェブ４Ａ間の寸法βとほぼ等しい寸法となって
いる。
また，ブーム２２の先端側には、各ウェブ２２Ａおよび
上，下フランジ２２Ｂ，２２Ｃの内面にそれぞれ溶接さ
れた長方形状の補強用仕切板２２Ｄと、該仕切板２２Ｄ
と上，下フランジ２２Ｂ，２２Ｃとにそれぞれ溶接され
、各ウェブ２２Ａ間を該各ウェブ２２Ａと平行に伸長し
た左，右の補助ウェブ２２Ｅ，２２Ｅと、仕切板２２Ｄ
よりもブーム２２の先端側に位置して該各補助ウェブ２
２Ｅと上，下フランジ２２Ｂ．２２Ｃとにそれぞれ溶接
され、前記仕切板２２Ｄよりも小さい長方形状に形成さ
れた補助板２２Ｆとが設けられ、これらは第２図，第４
図に示す如く各ウェブ２２Ａ，上．下フランジ２２Ｂ，
２２Ｃと共にそれぞれ空間Ａ，Ｂ，Ｃを画成してボック
ス形状（骨組み構造）をなすように形成されている．
一方、アーム２３は第２図に示す如《、左．右のウェブ
２３Ａ，２３Ａ，上フランジ（図示せず）および下フラ
ンジ２３Ｂによってボックス形状をなす中空部材として
形成され、アーム２３の基端側では各ウェブ２３Ａが下
フランジ２３Ｂから突出して互いに平行に延びるように
延設され、後述する各ブラケット２９のブラケット部２
９Ａを形成するようになっている．
２８．２８はブーム２２の先端に設けられた左，右一対
のボス部を示し、該各ボス部２８はブーム２２の各ウェ
ブ２２Ａおよび各補助ウェブ２２Ｈの先端に溶接により
固着されると共に、上，下フランジ２２Ｂ，２２Ｇの先
端にも溶接により固着されている．そして、該各ボス部
２８はブーム２２の先端側に設けられて骨組み構造をな
す各補助ウェブ２２Ｅ．補強板２２Ｆおよび仕切板２２
Ｄ等によって強度アップが図られるようになっている．
また、該各ボス部２８には後述の各連結ピン３０が挿通
されるピン穴２８Ａが穿設されている。
２９．２９はアーム２３の基端側に設けられた左，右一
対の二又状ブラケットを示し、該各ブラケット２９は、
アーム２３の各ウェブ２３Ａを互いに平行に延ばすこと
によって形成された外側のブラケット部２９Ａ，２９Ａ
と、該各ブラケット部２９Ａ間に位置して各ボス部２８
の肉厚ｔ（第３図参照）にほぼ対応する寸法だけ該各ブ
ラケット部２９Ａから離間し、基端側が下フランジ２３
Ｂにそれぞれ溶接された内側のブラケット部２９Ｂ，２
９Ｂとからなり、該各ブラケット部２９Ａ，２９Ｂは下
フランジ２３Ｂを介して二又形状をなすように配設され
ている。また、該各ブラケット部２９Ａ，２９Ｂにはそ
れぞれ略円板状の補強板２９Ｇ，２９Ｃ，−・・が溶接
により固着され、該各補強板２９Ｃを貫通するようにし
てピン穴２９Ｄ，２９Ｄ，・・・が穿設されている。
３０．３０はブーム２２の各ボス部２８をアーム２３の
各二又状ブラケット２９に連結した左．右一対の連結ピ
ンを示し、該各連結ピン３０は各ボス部２８を各ブラケ
ット２９のブラケット部２９Ａ，２９Ｂ間番ζ差込んだ
（挿入した）状態で各ピン穴２８Ａ．２９Ｄ内に挿通さ
れ、ブーム２２とアーム２３との間を回動可能にピン結
合するようになっている．そして、該各連結ピン３０は
各ブラケット部２９Ａ．２９Ｂ間で両持ち支持状態とな
って、各ボス部２８を回動可能に連結し、アーム２３，
パケット２４等の荷重（重量）を２本で分担して支持す
ればよいから、従来技術で述べた連結ピンｌ２に比較し
て大幅に短尺でかつ小径に形成できるようになっている
．本実施例によるバックホウ式作業装置２ｌは上述の如
き構成を有するもので、その基本的作動については従来
技術によるものと格別差異はない．然るに本実施例では
、ブーム２２の先端側に一対のボス部２８．２８を設け
、該各ボス部２８が挿入される一対の二又状ブラケット
２９．２９をアーム２３の基端側に設け、該各ポス部２
８と各ブラケット２９とを一対の連結ピン３０．３０を
用いて回動可能に連結する構成としたから、ブーム２２
の先端側を左．右のウェブ２２Ａ，２２Ａが互いに平行
に延びるように形成でき、従来技術のように曲げ加工等
を施す必要がなく、ブーム２２の先端側形状を大幅に簡
素化できる上に、ブーム２２全体の重量を確実に軽減で
きる。
また、各ブラケット２９のブラケット部２９Ａ．２９Ｂ
と各ボス部２８との間を各連結ピン３０によって連結し
たから、該各連結ピン３０を短尺でかつ小径に形成でき
、各連結ピン３０の重量を大幅に軽減できる上に、短尺
に形成することによって各連結ピン３０の強度も大幅に
高めることができ、ブーム２２に対してアーム２３等を
高強度に支持できる．さらに、２本の連結ピン３０．３
０の合計重量を従来技術で述べた１本の連結ピン１２よ
りも確実に軽量化でき、作業装置２１全体の重量も軽減
できるから、バックホウパケット２４による土砂等の積
荷量も増大でき、作業性能（フロント性能）を向上でき
る。
また，各連結ピン３０を計量化することによって、現場
作業等で各連結ピン３０を交換するときに、該各連結ピ
ン３０を比較的簡単に運搬でき、サービス性を向上でき
る上に、交換時の作業性や安全性を高めることができる
。
さらに、ブーム２２の先端側には各ウェブ２２Ａ，上，
下フランジ２２Ｂ，２２Ｃ間に位置して骨組み構造をな
す仕切板２２Ｄ，各補助ウェブ２２Ｅおよび補強板２２
Ｆを設けたから、これらによって各ボス部２８を高強度
に支持できる上に、ブーム２２の強度も向上でき、各ウ
ェブ２２Ａ等の板厚を薄肉化することができる。また、
アーム２３は各ウェブ２３Ａを平行に延ばすことによっ
て各ブラケット２９のブラケット部２９Ａを形成したか
ら、該各ブラケット２９がアーム２３の各ウェブ２３Ａ
から左，右に張出すのを防止でき、アーム２３の形状を
簡素化できる等、種々の効果を奏する．A feature of the configuration adopted by the present invention in order to solve the above-mentioned problems is that the boom is formed so that the left and right webs extend parallel to each other toward the tip side, and the tip of each web and the top and bottom of the boom are A pair of left and right bosses are provided at the tip of the flange, and each boss is connected to the arm via a pair of left and right connecting pins. In addition, the arm is provided with at least a left web by extending the left and right webs in parallel. A right pair of forked brackets are formed, each boss portion of the boom is inserted into each of the forked brackets, and both ends of each of the connecting pins are supported by each forked bracket. preferable. [Function] With the above configuration, there is no need to bend the left and right webs on the tip side of the boom, the shape can be simplified, and a pair of boss portions are provided on the tip side of each web to Since each boss portion is connected to the arm by a pair (two) of connecting pins, each connecting pin can be formed short and small in diameter, improving strength. Furthermore, by forming a pair of forked brackets by extending each web of the arm in parallel, the shape of the arm can be prevented from becoming complicated, and each connecting pin can be supported on both sides by each forked bracket. [Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In the embodiment, the same components as those of the prior art shown in FIG. 5 described above are denoted by the same reference numerals, and the explanation thereof will be omitted. In the figure, reference numeral 21 indicates a backhoe-type working device provided on the revolving frame 2A of the upper revolving structure 2, and the working device 2l has a boom 22, which is similar to the working device 3 described in the prior art.
, arm 23, backhoe bucket 24. Boom cylinder 25, arm cylinder 26 and packet cylinder 2
It is roughly composed of 7. Then, the working device 2
As shown in Figures 2 to 4, the boom 22 of No. 1 is located on the left,
Right webs 22A, 22A and upper and lower flanges 22B
, 22C, each web 22A of the boom 22 is formed as a box-shaped hollow member.
The core webs 2 are formed to extend parallel to each other from the intermediate portion in the length direction to the distal end side, and the distance dimension 2 is approximately equal to the dimension β between the core webs 4A described in the prior art. Further, on the tip side of the boom 22, there is a rectangular reinforcing partition plate 22D welded to the inner surfaces of each web 22A and the upper and lower flanges 22B, 22C, respectively, and the partition plate 22D.
and left and right auxiliary webs 22E, 22E welded to the upper and lower flanges 22B, 22C, respectively, and extending parallel to each web 22A between each web 22A, and a partition plate 22D.
Each auxiliary web 2 is located closer to the tip of the boom 22 than the
2E and upper and lower flanges 22B. 22C and an auxiliary plate 22F formed in a rectangular shape smaller than the partition plate 22D are provided.
As shown in the figure, each web 22A, top. lower flange 22B,
Together with 22C, they define spaces A, B, and C, respectively, and are formed in a box shape (skeleton structure). On the other hand, the arm 23 is mounted on the left side as shown in FIG. It is formed as a box-shaped hollow member by the right webs 23A, 23A, an upper flange (not shown), and a lower flange 23B, and on the base end side of the arm 23, each web 23A protrudes from the lower flange 23B and extends parallel to each other. The bracket portion 2 of each bracket 29, which will be described later, is extended as shown in FIG.
It is designed to form 9A. 28. 28 indicates a pair of left and right boss portions provided at the tip of the boom 22, each boss portion 28 is fixed by welding to the tip of each web 22A and each auxiliary web 22H of the boom 22, and the upper , are also fixed to the tips of the lower flanges 22B and 22G by welding. Each of the boss portions 28 is connected to each auxiliary web 22E. Reinforcement plate 22F and partition plate 22
D etc. are designed to increase the strength.
Further, each boss portion 28 is provided with a pin hole 28A through which each connecting pin 30 (described later) is inserted. 29. 29 indicates a pair of left and right forked brackets provided on the proximal end side of the arm 23, and each bracket 29 is
Outer bracket portions 29A, 29A formed by extending each web 23A of arm 23 parallel to each other
and each boss portion 28 located between each bracket portion 29A.
It is spaced apart from each bracket part 29A by a dimension approximately corresponding to the wall thickness t (see FIG. 3), and the base end side is located at the lower flange 23
Inner bracket parts 29B, 2 welded to B, respectively
9B, and each bracket portion 29A, 29B is arranged so as to form a forked shape via a lower flange 23B. In addition, approximately disk-shaped reinforcing plates 29G, 29C, . ... has been drilled. 30.30 is the left side connecting each boss portion 28 of the boom 22 to each forked bracket 29 of the arm 23. A right pair of connecting pins are shown, and each connecting pin 30 is inserted into each pin hole 28A. 29D, and the boom 22 and arm 23 are rotatably connected with a pin. Each connecting pin 30 is connected to each bracket portion 29A. The arms 23,
Since the load (weight) of the packet 24, etc. can be shared and supported by two pins, it can be formed much shorter and smaller in diameter than the connecting pin l2 described in the prior art. The backhoe type working device 2l according to this embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art. However, in this embodiment, a pair of boss portions 28.28 are provided on the distal end side of the boom 22, and a pair of forked brackets 29.29 into which the respective boss portions 28 are inserted are provided on the proximal end side of the arm 23. Each post section 2
8 and each bracket 29 are rotatably connected using a pair of connecting pins 30, 30, the boom 22
The tip side is on the left. The right webs 22A, 22A can be formed so as to extend parallel to each other, there is no need to perform bending work as in the prior art, and the shape of the tip side of the boom 22 can be greatly simplified, and the weight of the entire boom 22 can be reduced. can definitely be reduced. Also, the bracket portion 29A of each bracket 29. 29B
and each boss portion 28 are connected by each connecting pin 30, so each connecting pin 30 can be formed short and small in diameter, and the weight of each connecting pin 30 can be significantly reduced, and it can also be formed short. By doing so, the strength of each connecting pin 30 can be greatly increased, and the arm 23 and the like can be supported with high strength against the boom 22. Furthermore, two connecting pins 30.3
Since the total weight of the backhoe packet 24 can be surely reduced compared to the single connecting pin 12 described in the prior art, and the weight of the entire working device 21 can also be reduced, the amount of earth and sand etc. loaded by the backhoe packet 24 can be increased, and the working performance can be improved. (front performance) can be improved. In addition, by weighing each connecting pin 30, when replacing each connecting pin 30 in field work etc., each connecting pin 30 can be transported relatively easily, improving serviceability, and can improve workability and safety. Further, on the tip side of the boom 22, each web 22A, upper and
A partition plate 22D, each auxiliary web 22E, and a reinforcing plate 22 are located between the lower flanges 22B and 22C and form a framework structure.
Since F is provided, not only can each boss portion 28 be supported with high strength, but also the strength of the boom 22 can be improved, and the plate thickness of each web 22A etc. can be reduced. Also,
Since the arm 23 forms the bracket portion 29A of each bracket 29 by extending each web 23A in parallel, each bracket 29 extends each web 23A of the arm 23 in parallel.
This has various effects such as preventing the arm from protruding to the left or right and simplifying the shape of the arm 23.
以上詳述した通り本発明によれば、ブームの各ウェブを
平行に延ばして、その先端に一対のボス部を設け、該各
ボス部をアームに一対の連結ピンを介して連結する構成
としたから、ブームの形状を簡素化でき、全体の重量を
軽減できる上に、連結ピンを交換するときの作業性やサ
ービス性を向上でき、バックホウバケットによる土砂等
の積荷量を増大させ、作業性能を向上できる。また、ア
ームの各ウェブによって各ブラケットの一部を形成でき
、アームの形状を簡素化できる等、種々の効果を奏する
。As detailed above, according to the present invention, each web of the boom is extended in parallel, a pair of boss portions are provided at the tips thereof, and each of the boss portions is connected to the arm via a pair of connecting pins. This not only simplifies the shape of the boom and reduces the overall weight, but also improves workability and serviceability when replacing connecting pins, increases the amount of earth and sand loaded by the backhoe bucket, and improves work performance. You can improve. Further, each web of the arm can form a part of each bracket, and various effects such as the ability to simplify the shape of the arm can be achieved.
第１図ないし第４図は本発明の実施例を示し、第１図は
油圧ショベルの全体図、第２図は第１図中の矢示■一■
方向拡大断面図、第３図はブーム先端側の平面図、第４
図は第３図中矢示ｒＶ − ＩＶ方向拡大断面図、５図
および第６図は従来技術を示し、第５図は油圧ショベル
の全体図、第６図は第５図中の矢示Ｖｌ − Ｖ１方向
拡大断面図である．ｌ・・・下部走行体、２・・・上部
旋回体（作業機本体）、２１・・・バックホウ式作業装
置、２２・・・ブーム、２２Ａ・・・ウェブ、２２Ｂ・
・・上フランジ、２２Ｃ・・・下フランジ、２２Ｄ・・
・仕切板、２２Ｅ・・・補助ウェブ、２２Ｆ・・・補強
板、２３・・・アーム、２３Ａ・・・ウェブ、２３Ｂ・
・・下フランジ、２４・・・バックホウバケット、２８
・・・ボス部、２９・・・ブラケット、２９Ａ，２９Ｂ
・・・ブラケット部、３ｏ・・・連結ピン．1 to 4 show embodiments of the present invention, FIG. 1 is an overall view of a hydraulic excavator, and FIG.
Expanded sectional view in the direction, Figure 3 is a plan view of the boom tip side, Figure 4 is a top view of the boom tip side.
The figure is an enlarged sectional view in the direction of the arrow rV-IV in Fig. 3, Figs. It is an enlarged sectional view in the V1 direction. l... Lower traveling body, 2... Upper revolving body (work equipment main body), 21... Backhoe type work device, 22... Boom, 22A... Web, 22B.
...Top flange, 22C...Bottom flange, 22D...
・Partition plate, 22E... Auxiliary web, 22F... Reinforcement plate, 23... Arm, 23A... Web, 23B.
...Lower flange, 24...Backhoe bucket, 28
...Boss part, 29...Bracket, 29A, 29B
... Bracket part, 3o... Connection pin.
Claims (2)
のウェブと上、下のフランジとによって中空部材として
形成されたブームと、該ブームの先端側に俯仰動可能に
ピン結合され、左、右のウェブと上、下のフランジとに
よって中空部材として形成されたアームと、該アームの
先端側に回動可能にピン結合されたバックホウバケット
とからなるバックホウ式作業装置において、前記ブーム
は左、右のウェブが先端側へと互いに平行に延びるよう
に形成し、該各ウェブの先端および前記ブームの上、下
のフランジ先端には左、右一対のボス部を設け、該各ボ
ス部を左、右一対の連結ピンを介して前記アームに連結
したことを特徴とするバックホウ式作業装置。(1) A boom that is pin-coupled to the main body of the work equipment so that it can be tilted up and down, and formed as a hollow member by left and right webs and upper and lower flanges; , a backhoe-type working device comprising an arm formed as a hollow member by left and right webs and upper and lower flanges, and a backhoe bucket rotatably connected with a pin to the tip side of the arm; is formed such that left and right webs extend parallel to each other toward the tip side, and a pair of left and right boss portions are provided at the tip of each web and the top and bottom flange tips of the boom, and each boss A backhoe type working device, wherein the backhoe type working device is connected to the arm via a pair of left and right connecting pins.
に延ばすことによって左、右一対の二又状ブラケットを
形成し、該各二又状ブラケットに前記ブームの各ボス部
を挿入して、前記各連結ピンの両端側を各二又状ブラケ
ットによって支持してなる特許請求の範囲（１）項記載
のバックホウ式作業装置。(2) forming a pair of left and right forked brackets on the arm by extending at least left and right webs in parallel; inserting each boss portion of the boom into each of the forked brackets; The backhoe type working device according to claim 1, wherein both ends of each of the connecting pins are supported by respective forked brackets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1049439A JPH0715172B2 (en) | 1989-03-01 | 1989-03-01 | Backhoe work equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1049439A JPH0715172B2 (en) | 1989-03-01 | 1989-03-01 | Backhoe work equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02229327A true JPH02229327A (en) | 1990-09-12 |
| JPH0715172B2 JPH0715172B2 (en) | 1995-02-22 |
Family
ID=12831145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1049439A Expired - Fee Related JPH0715172B2 (en) | 1989-03-01 | 1989-03-01 | Backhoe work equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715172B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009058280A1 (en) * | 2007-10-31 | 2009-05-07 | Caterpillar Inc. | Linkage assembly for connecting an implement to the frame of a work machine |
| EP2118553A2 (en) * | 2007-02-09 | 2009-11-18 | Industrial Origami, Inc. | Load-bearing three-dimensional structure |
| US11473266B2 (en) * | 2018-03-28 | 2022-10-18 | Caterpillar Inc. | Articulation joint for a machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5592430A (en) * | 1978-12-30 | 1980-07-12 | Ryutaro Yoritomi | Depth watching mirror mounting device for shovel system excavator |
| JPS6254319U (en) * | 1985-09-24 | 1987-04-04 |
-
1989
- 1989-03-01 JP JP1049439A patent/JPH0715172B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5592430A (en) * | 1978-12-30 | 1980-07-12 | Ryutaro Yoritomi | Depth watching mirror mounting device for shovel system excavator |
| JPS6254319U (en) * | 1985-09-24 | 1987-04-04 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2118553A2 (en) * | 2007-02-09 | 2009-11-18 | Industrial Origami, Inc. | Load-bearing three-dimensional structure |
| EP2118553A4 (en) * | 2007-02-09 | 2014-04-16 | Ind Origami Inc | Load-bearing three-dimensional structure |
| WO2009058280A1 (en) * | 2007-10-31 | 2009-05-07 | Caterpillar Inc. | Linkage assembly for connecting an implement to the frame of a work machine |
| US7736117B2 (en) | 2007-10-31 | 2010-06-15 | Caterpillar Inc. | Linkage assembly |
| JP2011502220A (en) * | 2007-10-31 | 2011-01-20 | キャタピラー インコーポレイテッド | Link assembly for connecting tool to work machine frame |
| US11473266B2 (en) * | 2018-03-28 | 2022-10-18 | Caterpillar Inc. | Articulation joint for a machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0715172B2 (en) | 1995-02-22 |
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