JPS621328Y2 - - Google Patents

Info

Publication number
JPS621328Y2
JPS621328Y2 JP14148681U JP14148681U JPS621328Y2 JP S621328 Y2 JPS621328 Y2 JP S621328Y2 JP 14148681 U JP14148681 U JP 14148681U JP 14148681 U JP14148681 U JP 14148681U JP S621328 Y2 JPS621328 Y2 JP S621328Y2
Authority
JP
Japan
Prior art keywords
boom
set pin
pivot
bucket
hydraulic cylinder
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.)
Expired
Application number
JP14148681U
Other languages
Japanese (ja)
Other versions
JPS5845768U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP14148681U priority Critical patent/JPS5845768U/en
Publication of JPS5845768U publication Critical patent/JPS5845768U/en
Application granted granted Critical
Publication of JPS621328Y2 publication Critical patent/JPS621328Y2/ja
Granted legal-status Critical Current

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Description

【考案の詳細な説明】 本考案は伸縮可能な堀削機用ブームに関するも
のである。従来、堀削機一台にて堀削する溝、穴
等の深さを深くするために、ブームの長さを油圧
シリンダ等を用いて長くするようにした伸縮可能
なブームが種々提案されているけれども、いずれ
も製作費がかさむという欠点がある。
[Detailed Description of the Invention] The present invention relates to a retractable boom for an excavator. In the past, various types of extendable booms have been proposed in which the length of the boom is increased using a hydraulic cylinder, etc., in order to deepen the depth of grooves, holes, etc. that can be dug with a single excavator. However, they all have the disadvantage of being expensive to produce.

本考案は伸縮可能なブームを安価に提供するた
めに、堀削機用ブームを中間ブームと該中間ブー
ム内に摺動可能に嵌合した伸縮用ブームとによつ
て構成し、伸縮用ブームを調節位置においてセツ
トピンにて中間ブームに固定するようになすとと
もに、中間ブームに装着したバケツト操作用油圧
シリンダのピストンロツドと伸縮用ブームの先端
部に枢着したバケツトの背面とを枢着連結する連
結ロツドを前記伸縮用ブームの調節ごとに調節長
さに応じた長さのものに交換するようになしたも
のである。
In order to provide a telescopic boom at a low cost, the present invention consists of a boom for an excavator consisting of an intermediate boom and a telescopic boom slidably fitted into the intermediate boom. A connecting rod that is fixed to the intermediate boom with a set pin in the adjustment position and that pivotally connects the piston rod of the hydraulic cylinder for bucket operation mounted on the intermediate boom and the back of the bucket that is pivotally attached to the tip of the telescopic boom. Each time the telescopic boom is adjusted, it is replaced with a length corresponding to the adjusted length.

以下、本考案を図示の実施例について詳細に説
明する。図において、1は伸縮可能な堀削機用ブ
ームであつて、中間ブーム2と該中間ブーム2内
に摺動可能に嵌合した伸縮用ブーム3とによつて
構成されている。中間ブーム2の基部にはピスト
ンロツド4を備えたバケツト操作用油圧シリンダ
5を取付軸6にて揺動可能に取付けてある。中間
ブーム2の先端部には長手方向に間隔をおいて1
対のセツトピン挿入用孔7と8を設けてある。伸
縮用ブーム3には長手方向に2対の調節用孔9と
10および11と12を設けてあつて、各対の調
節用孔の間隔はセツトピン挿入用孔7と8の間隔
と同じにしてある。伸縮用ブーム3の先端部両側
に突出している枢着軸13の両端部にバケツト1
4の後縁部両側の軸受部15,15を枢着してあ
る。16は枢着兼用セツトピンであつて、セツト
ピン挿入用孔7と該孔7に選択的に対向する調節
用孔9または11とに取外し可能に取付けるよう
になつている。17はセツトピンであつて、セツ
トピン挿入用孔8と該孔8に選択的に対向する調
節用孔10または12とに取外し可能に取付ける
ようになつている。中間ブーム2の先端部両側に
突出している枢着兼用セツトピン16の両端部に
リンク18,18の基部の枢着し、リンク18,
18の先端部に連結ピン19を取外し可能に取付
けてある。連結ピン19には前記油圧シリンダ5
のピストンロツド4の先端部を枢着してあつて、
油圧シリンダ5を作動すると、ピストンロツド4
と連結ピン19とを介してリンク18,18が枢
着兼用セツトピン16の周りを回動するようにな
つている。バケツト14の背面中央部の軸受部2
0,20には枢着ピン21を取外し可能に取付け
てある。22,23は長さの異なる交換可能な連
結ロツドであつて、伸縮用ブーム3の調節ごとに
その調節の長さに応じて連結ロツド22と23と
のいずれかの両端部を前記連結ピン19と枢着ピ
ン21とに枢着連結するようになつてる。24,
24は前記枢着軸13と枢着ピン21とに枢着し
た補助リンクである。補助リンク24とリンク1
8とは同じ長さであつて、油圧シリンダ5を作動
する際に補助リンク24がリンク18と平行状態
を保つて枢着軸13の周りを回動するように連結
ロツド22と23の長さに設計してある。25,
26はそれぞれ取付用孔である。図面には調節用
孔を2対設け、連結ロツドを2本備えた実施例を
図示してあるけれども、調節用孔の対数と連結ロ
ツドの本数とを適宜増加してもよいことは勿論で
ある。
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In the figure, reference numeral 1 denotes an extendable boom for an excavator, which is composed of an intermediate boom 2 and an extendable boom 3 slidably fitted into the intermediate boom 2. At the base of the intermediate boom 2, a bucket operating hydraulic cylinder 5 equipped with a piston rod 4 is swingably mounted on a mounting shaft 6. At the tip of the intermediate boom 2, there are 1
A pair of set pin insertion holes 7 and 8 are provided. The telescopic boom 3 is provided with two pairs of adjustment holes 9 and 10 and 11 and 12 in the longitudinal direction, and the interval between each pair of adjustment holes is the same as the interval between the set pin insertion holes 7 and 8. be. Buckets 1 are attached to both ends of the pivot shaft 13 that protrudes from both sides of the tip of the telescopic boom 3.
Bearings 15, 15 on both sides of the rear edge of 4 are pivotally connected. Reference numeral 16 denotes a set pin which also serves as a pivot, and is adapted to be removably attached to the set pin insertion hole 7 and the adjustment hole 9 or 11 selectively facing the hole 7. Reference numeral 17 denotes a set pin, which is removably attached to the set pin insertion hole 8 and the adjustment hole 10 or 12 selectively facing the hole 8. The bases of the links 18, 18 are pivotally connected to both ends of a set pin 16 which also functions as a pivot joint and which protrudes from both sides of the tip of the intermediate boom 2.
A connecting pin 19 is removably attached to the tip of 18. The hydraulic cylinder 5 is connected to the connecting pin 19.
The tip of the piston rod 4 is pivotally connected,
When the hydraulic cylinder 5 is actuated, the piston rod 4
The links 18, 18 are adapted to rotate around the set pin 16, which also serves as a pivot joint, through the connecting pin 19 and the connecting pin 19. Bearing part 2 at the center of the back of bucket 14
0 and 20, pivot pins 21 are removably attached. Reference numerals 22 and 23 are exchangeable connecting rods having different lengths, and each time the telescopic boom 3 is adjusted, either end of the connecting rods 22 and 23 is connected to the connecting pin 19 depending on the length of the adjustment. and a pivot pin 21. 24,
24 is an auxiliary link pivotally connected to the pivot shaft 13 and the pivot pin 21. Auxiliary link 24 and link 1
8, and the lengths of the connecting rods 22 and 23 are such that when the hydraulic cylinder 5 is actuated, the auxiliary link 24 remains parallel to the link 18 and rotates around the pivot shaft 13. It is designed to. 25,
26 are mounting holes, respectively. Although the drawing shows an embodiment with two pairs of adjusting holes and two connecting rods, it goes without saying that the number of pairs of adjusting holes and the number of connecting rods may be increased as appropriate. .

本考案の伸縮可能な堀削機用ブームは以上のよ
うに構成されていて、取付用孔25を枢着軸にて
堀削機の施回主ブームの先端部に取付け、取付用
孔26を枢着軸にてブーム操作用油圧シリンダの
ピストンロツドの先端部に取付けて取用するもの
である。通常の堀削時には第1図に示すように伸
縮用ブーム3は中間ブーム2内に最も深く嵌入
し、ブーム1は最も短かい状態となつている。油
圧シリンダ5を作動してピストンロツド4を往復
動させると、連結ピン19を介してリンク18,
18は枢着兼用セツトピン16の周りを往復回動
する。これと同時に連結ピン19と連結ロツド2
2と枢着ピン21とを介して補助リンク24,2
4がリンク18,18と平行状態に保つて枢着軸
13の周りを往復回動し、バケツト14が枢着軸
13の周りを往復回動することによつて堀削作業
を行なうことができるのである。ブーム1の長さ
を長くするには、第1図において、枢着兼用セツ
トピン16とセツトビン17と連結ピン19と枢
着ピン21と連結ロツド22とを取外し、次いで
伸縮用ブーム3を第2図に示すように中間ブーム
2内から引出し、連結ロツド22を連結ロツド2
3に交換したのち、前記ピン16,17,19,
21を第2図に示すように取付けるのである。伸
縮用ブーム3を調節した後において、リンク18
と補助リンク24が平行であつて、調節前と同様
に堀削を行なうことができるのである。
The extendable and retractable boom for an excavator of the present invention is constructed as described above, and the mounting hole 25 is attached to the tip of the main boom of the excavator using the pivot shaft, and the mounting hole 26 is attached to the tip of the main boom of the excavator. It is attached to the tip of the piston rod of the hydraulic cylinder for boom operation using a pivot shaft. During normal excavation, as shown in FIG. 1, the telescopic boom 3 is fitted into the intermediate boom 2 at its deepest position, and the boom 1 is at its shortest position. When the hydraulic cylinder 5 is actuated to reciprocate the piston rod 4, the link 18,
Reference numeral 18 reciprocates around a set pin 16 which also serves as a pivot. At the same time, the connecting pin 19 and the connecting rod 2
2 and the auxiliary link 24, 2 via the pivot pin 21.
4 is kept parallel to the links 18, 18 and reciprocated around the pivot shaft 13, and the bucket 14 is reciprocated around the pivot shaft 13, thereby making it possible to carry out excavation work. It is. To increase the length of the boom 1, remove the pivot set pin 16, set bin 17, connection pin 19, pivot pin 21, and connection rod 22 in FIG. 1, and then remove the telescopic boom 3 as shown in FIG. As shown in the figure, pull out the intermediate boom 2 from inside and attach the connecting rod 22 to the connecting rod 2.
After replacing the pins 16, 17, 19,
21 is attached as shown in FIG. After adjusting the telescopic boom 3, link 18
Since the auxiliary link 24 is parallel to the auxiliary link 24, digging can be performed in the same manner as before adjustment.

以上の説明によつて明らかであるように、本考
案は堀削機用ブームを中間ブームと該中間ブーム
内に摺動可能に嵌合した伸縮用ブームとによつて
構成し、伸縮用ブームを調節位置においてセツト
ピンにて中間ブームに固定するようになすととも
に、中間ブームに装着したバケツト操作用油圧シ
リンダのピストンロツドと伸縮用ブームの先端部
に枢着したバケツトの背面とを枢着連結する連結
ロツドを前記伸縮用ブームの調節ごとに調節長さ
に応じた長さのものに交換するようになしたもの
であつて、ブームの長さの調節には油圧シリンダ
を使用しないものであるので、構造が簡単で製作
が容易であつて、伸縮可能な堀削機用ブームを安
価に提供できるとともに、油圧系の故障に影響さ
れることなくブームの長さを調節することができ
る。さらに、本考案はブームの長さを調節する際
に連結ロツドを交換してブームの長さを調節する
前と後とにおいてともに平行リンク機構にてバケ
ツトを操作するようになしたものであるので、ブ
ームの調節に関係なく堀削作業を円滑に行なうこ
とができるのである。
As is clear from the above description, the present invention comprises a boom for an excavator including an intermediate boom and a telescoping boom slidably fitted into the intermediate boom. A connecting rod that is fixed to the intermediate boom with a set pin in the adjustment position and that pivotally connects the piston rod of the hydraulic cylinder for bucket operation mounted on the intermediate boom and the back of the bucket that is pivotally attached to the tip of the telescopic boom. Each time the telescoping boom is adjusted, it is replaced with a length corresponding to the adjustment length, and a hydraulic cylinder is not used to adjust the length of the boom, so the structure is To provide a boom for an excavator that is simple and easy to manufacture, is extendable and retractable at low cost, and allows the length of the boom to be adjusted without being affected by failure of a hydraulic system. Furthermore, in the present invention, when adjusting the length of the boom, the connecting rod is replaced and the bucket is operated by a parallel link mechanism both before and after adjusting the length of the boom. Therefore, the excavation work can be carried out smoothly regardless of the adjustment of the boom.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の実施例を示すものであつて、第
1図は通常の状態を示す一部切断側面図、第2図
は伸長状態を示す一部切断側面図、第3図は要部
の斜視図、第4図は第1図のA−A線に沿う断面
図である。 1……堀削機用ブーム、2……中間ブーム、3
……伸縮用ブーム、4……ピストンロツド、5…
…油圧シリンダ、6……取付軸、7,8……セツ
トピン挿入用孔、9,10,11,12……調節
用孔、13……枢着軸、14……バケツト、15
……軸受部、16……枢着兼用セツトピン、17
……セツトピン、18……リンク、19……連結
ピン、20……軸受部、21……枢着ピン、2
2,23……連結ロツド、24……補助リンク、
25,26……取付用孔。
The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view showing the normal state, Fig. 2 is a partially cutaway side view showing the extended state, and Fig. 3 shows the main parts. The perspective view and FIG. 4 are cross-sectional views taken along line A-A in FIG. 1. 1...Boom for excavator, 2...Intermediate boom, 3
...Telescopic boom, 4...Piston rod, 5...
... Hydraulic cylinder, 6 ... Mounting shaft, 7, 8 ... Set pin insertion hole, 9, 10, 11, 12 ... Adjustment hole, 13 ... Pivot shaft, 14 ... Bucket, 15
... Bearing part, 16 ... Pivot combination set pin, 17
... Set pin, 18 ... Link, 19 ... Connection pin, 20 ... Bearing section, 21 ... Pivot pin, 2
2, 23...Connection rod, 24...Auxiliary link,
25, 26...Mounting holes.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 堀削機用ブームを中間ブームと該中間ブーム内
に摺動可能に嵌合した伸縮用ブームとによつて構
成し、前記中間ブームの基部にはバケツト操作用
油圧シリンダを装着するとともにその先端部には
長手方向に間隔をおいて1対のセツトピン挿入用
孔を設け、前記伸縮用ブームには前記1対のセツ
トピン挿入用孔の間隔と同じ間隔の調節用孔を複
数対設けるとともにその先端部の両側にはバケツ
トを回動可能に枢着し、前記1対のセツトピン挿
入用孔といずれか1対の調節用孔とに枢着兼用セ
ツトピンとセツトピンとを取外し可能に取付け、
該枢着兼用セツトピンにて前記中間ブームの両側
にリンクの基部を枢着し、該リンクの先端部に取
外し可能に取付けた連結ピンにて前記油圧シリン
ダのピストンロツドの先端部と連結ロツドの一端
とを枢着連結し、該連結ロツドの他端を前記バケ
ツトの背面中央部に取外し可能に取付けた枢着ピ
ンにて枢着連結し、前記連結ロツドを前記伸縮用
ブームの調節長さに応じた長さのものに交換する
ようになしたことを特徴とする伸縮可能な堀削機
用ブーム。
A boom for an excavator is composed of an intermediate boom and a telescopic boom slidably fitted into the intermediate boom, and a hydraulic cylinder for bucket operation is attached to the base of the intermediate boom, and a hydraulic cylinder for bucket operation is attached to the base of the intermediate boom. is provided with a pair of set pin insertion holes at intervals in the longitudinal direction, and the telescoping boom is provided with a plurality of pairs of adjustment holes with the same spacing as the pair of set pin insertion holes, and a distal end thereof. A bucket belt is rotatably pivotally mounted on both sides of the bucket belt, and a pivot-mounted set pin and a set pin are removably mounted in the pair of set pin insertion holes and any one pair of adjustment holes,
The base of the link is pivotally connected to both sides of the intermediate boom by the pivot and set pin, and the connecting pin removably attached to the tip of the link connects the tip of the piston rod of the hydraulic cylinder to one end of the connecting rod. The other end of the connecting rod is pivotally connected with a pivot pin removably attached to the central part of the back of the bucket, and the connecting rod is adjusted according to the adjustable length of the telescopic boom. An extendable boom for a digging machine, characterized in that it can be exchanged for a longer boom.
JP14148681U 1981-09-25 1981-09-25 Extendable excavator boom Granted JPS5845768U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14148681U JPS5845768U (en) 1981-09-25 1981-09-25 Extendable excavator boom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14148681U JPS5845768U (en) 1981-09-25 1981-09-25 Extendable excavator boom

Publications (2)

Publication Number Publication Date
JPS5845768U JPS5845768U (en) 1983-03-28
JPS621328Y2 true JPS621328Y2 (en) 1987-01-13

Family

ID=29934584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14148681U Granted JPS5845768U (en) 1981-09-25 1981-09-25 Extendable excavator boom

Country Status (1)

Country Link
JP (1) JPS5845768U (en)

Also Published As

Publication number Publication date
JPS5845768U (en) 1983-03-28

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