JPS583904Y2 - excavator boom - Google Patents

excavator boom

Info

Publication number
JPS583904Y2
JPS583904Y2 JP1976049415U JP4941576U JPS583904Y2 JP S583904 Y2 JPS583904 Y2 JP S583904Y2 JP 1976049415 U JP1976049415 U JP 1976049415U JP 4941576 U JP4941576 U JP 4941576U JP S583904 Y2 JPS583904 Y2 JP S583904Y2
Authority
JP
Japan
Prior art keywords
boom
tip
yoke member
excavator
yoke
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
JP1976049415U
Other languages
Japanese (ja)
Other versions
JPS52141202U (en
Inventor
良弘 石田
Original Assignee
株式会社小松製作所
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 by 株式会社小松製作所 filed Critical 株式会社小松製作所
Priority to JP1976049415U priority Critical patent/JPS583904Y2/en
Publication of JPS52141202U publication Critical patent/JPS52141202U/ja
Application granted granted Critical
Publication of JPS583904Y2 publication Critical patent/JPS583904Y2/en
Expired legal-status Critical Current

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Description

【考案の詳細な説明】 本考案は、掘削機のブーム装置に関するものである。[Detailed explanation of the idea] The present invention relates to a boom device for an excavator.

掘削機のブーム装置は第1図に示すようになっていて、
基端部が車体aに枢支されたブームbの先端にアームC
が枢支され、ブームシリンダd、アームシリンダeおよ
びパケットシリンダfを伸縮作動することによりアーム
Cの先端に枢支したパケットgにて掘削仕事をするよう
になっている。
The boom device of the excavator is shown in Figure 1.
An arm C is attached to the tip of a boom b whose base end is pivoted to the vehicle body a.
is pivotally supported, and excavation work is carried out with the packet g pivoted at the tip of the arm C by telescopically operating the boom cylinder d, arm cylinder e, and packet cylinder f.

そして従来のブームbとアームCの結合部は第2図およ
び第3図に示すようになっていて、ブーム本体b1に対
して鋳鋼製のヨーク部材b2が嵌合した主溶接結合する
ようになっていた。
The conventional joint between the boom b and the arm C is as shown in Figures 2 and 3, and is connected by main welding with a cast steel yoke member b2 fitted to the boom body b1. was.

一方掘削機の掘削時には負荷がアームCを介してブーム
bの先端に作用し、特にパケットgで溝掘りを行なった
場合、掘削時の終りに近い時点において、掘削すくい込
みをしながら旋回動作に入るためパケット側面が溝側面
に衝突するときもあり、これにより上記ブーム先端には
大きな捩りモーメントが作用する。
On the other hand, when an excavator excavates, the load acts on the tip of the boom b via the arm C, and especially when digging a trench with the packet g, near the end of the excavation, the load acts on the tip of the boom b while scooping the excavation. Because of this, the side of the packet sometimes collides with the side of the groove, which causes a large torsional moment to act on the tip of the boom.

このため上記した従来の構造のブームではその溶接結合
個所から破損することがあった。
For this reason, the boom of the above-mentioned conventional structure may break at the welded joint.

本考案は上記のことにかんがみなされたもので、ブーム
先端部とヨーク部材との結合形状を改良することにより
、上記従来の不具合を解消して強度向上を図ったブーム
装置を提供しようとするものである。
The present invention was developed in consideration of the above, and aims to provide a boom device that eliminates the above-mentioned conventional problems and improves strength by improving the shape of the connection between the boom tip and the yoke member. It is.

以下その構成を第4図、第5図に示した実施例に基づい
て説明する。
The configuration will be explained below based on the embodiment shown in FIGS. 4 and 5.

ブーム1の先端を上下方向に半径Rの円弧状に形成する
The tip of the boom 1 is formed into an arc shape with a radius R in the vertical direction.

一方ヨーク部材2の基端はブーム1の先端幅と略同−幅
でかつブーム1の先端の上下面に沿って嵌合するヨーク
状に形成されその奥端部はブーム1の先端が密に接触す
るように円弧状に形成されている。
On the other hand, the base end of the yoke member 2 is formed into a yoke shape that has approximately the same width as the tip end width of the boom 1 and fits along the upper and lower surfaces of the tip end of the boom 1. They are formed in an arc shape so that they touch each other.

そしてブーム1の先端にヨーク部材2の基部を嵌合して
その嵌合部を溶接する。
Then, the base of the yoke member 2 is fitted to the tip of the boom 1, and the fitting portion is welded.

本考案は以上のようになるから、ブーム1の先端とヨー
ク部材2のが互いに円弧星凹凸で嵌合固着されることに
より、上下、横方向の応力はもちろんのこと、これらに
よる捩り応力に対する強度が著しく向上される。
Since the present invention is as described above, by fitting and fixing the tip of the boom 1 and the yoke member 2 to each other with the circular arc star unevenness, the strength against not only vertical and lateral stress but also torsional stress caused by these is strong. is significantly improved.

また上下両部材相互の結合構造による強度に加えて溶接
線が、ブーム1の上下面から、ブーム1の両側面にこれ
の先端方向にU字状に延長されて、この溶接線を極めて
長くすることができ、しかも上下面の溶接線と両側面で
の溶接線とがブーム1の長手方向にずれていることによ
り、溶接部に作用する応力が広く分散されて溶接部に大
きな集中応力が作用するのを防止することができる。
In addition to the strength provided by the joint structure between the upper and lower members, the weld line extends from the upper and lower surfaces of the boom 1 to both sides of the boom 1 in a U-shape toward the tip, making this weld line extremely long. Moreover, because the weld lines on the top and bottom surfaces and the weld lines on both sides are offset in the longitudinal direction of the boom 1, the stress acting on the weld is widely dispersed, resulting in large concentrated stress acting on the weld. It is possible to prevent this from happening.

また上記ブーム1とヨーク部材2との溶接結合した上に
さらに必要に応じて両側面に補強鋼板3,3を当て・そ
の縁辺を溶接することによりさらに強度を向上すること
ができる。
Further, in addition to the welded connection of the boom 1 and the yoke member 2, the strength can be further improved by applying reinforcing steel plates 3, 3 to both sides as necessary and welding the edges thereof.

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

第1図は掘削機のブーム装置を示す斜視図、第2図は従
来のブームの斜視図、第3図は要部の分解斜視図、第4
図は本考案に係るブームの要部の分解斜視図、第5図は
溶接結合状態での斜視図である。 1はブーム、2はヨーク部材。
Fig. 1 is a perspective view showing a boom device of an excavator, Fig. 2 is a perspective view of a conventional boom, Fig. 3 is an exploded perspective view of main parts, and Fig. 4 is a perspective view showing a boom device of an excavator.
The figure is an exploded perspective view of the main parts of the boom according to the present invention, and FIG. 5 is a perspective view of the boom in a welded state. 1 is the boom, 2 is the yoke member.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ブーム1の先端を上下方向に円弧面を有する円弧状に形
成し、またアーム結合用のヨーク部材2の基端部をブー
ム1の先端部幅と略同−幅でかつブーム1の先端の上下
面に沿って嵌合するようにしてヨーク状に形成し、その
奥端部をブーム1の先端が密に接触するように円弧状に
形成して、このヨーク部材2をブーム1の先端に嵌合し
てその嵌合縁辺を溶接してなることを特徴とする掘削機
のブーム。
The tip of the boom 1 is formed into an arc shape with an arcuate surface in the vertical direction, and the base end of the yoke member 2 for arm connection is approximately the same width as the tip of the boom 1 and above the tip of the boom 1. The yoke member 2 is formed into a yoke shape so as to fit along the lower surface, and the rear end thereof is formed into an arc shape so that the tip of the boom 1 comes into close contact with the yoke member 2. A boom for an excavator, characterized in that the boom is formed by welding the mating edges together.
JP1976049415U 1976-04-22 1976-04-22 excavator boom Expired JPS583904Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1976049415U JPS583904Y2 (en) 1976-04-22 1976-04-22 excavator boom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1976049415U JPS583904Y2 (en) 1976-04-22 1976-04-22 excavator boom

Publications (2)

Publication Number Publication Date
JPS52141202U JPS52141202U (en) 1977-10-26
JPS583904Y2 true JPS583904Y2 (en) 1983-01-22

Family

ID=28508599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1976049415U Expired JPS583904Y2 (en) 1976-04-22 1976-04-22 excavator boom

Country Status (1)

Country Link
JP (1) JPS583904Y2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5015708B2 (en) * 1971-08-30 1975-06-06

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5256645Y2 (en) * 1973-06-05 1977-12-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5015708B2 (en) * 1971-08-30 1975-06-06

Also Published As

Publication number Publication date
JPS52141202U (en) 1977-10-26

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