JP2007314981A - Idler link of bucket - Google Patents

Idler link of bucket Download PDF

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JP2007314981A
JP2007314981A JP2006143806A JP2006143806A JP2007314981A JP 2007314981 A JP2007314981 A JP 2007314981A JP 2006143806 A JP2006143806 A JP 2006143806A JP 2006143806 A JP2006143806 A JP 2006143806A JP 2007314981 A JP2007314981 A JP 2007314981A
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link
bucket
arm
pin holes
centers
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JP4716923B2 (en
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Yoshihiro Okamoto
吉弘 岡本
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Caterpillar Japan Ltd
Caterpillar Mitsubishi Ltd
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Caterpillar Mitsubishi Ltd
Shin Caterpillar Mitsubishi Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an idler link which is provided for a bucket link for rocking a bucket, and improved in strength by employing a relatively simple structure. <P>SOLUTION: The idler link (36) is formed of a flat plate-like link body (36a) which is long and has pin holes (20, 22) bored in both ends thereof, and a band-shaped reinforcing plate (36b) which is formed in one body together with the link main body so as to be erected from one surface of the same between the pairing pin holes on a line (X) connecting between centers of the respective pin holes. The link main body is provided with: arched edges (E1, E2) formed at respective ends; an angle edge (E3) which has a linear portion (S1) extending on one side of the line connecting between the centers and substantially in parallel with the same, and is convexed from the pairing arched edges; and a valley edge (E4) which has a linear portion (S2) extending on the other side of the line connecting between the centers and substantially in parallel with the same, and is concaved from the pairing arched edges. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、アームに揺動自在に装備したバケットを揺動させるバケットリンクのアイドラリンクに関する。 The present invention relates to an idler link of a bucket link that swings a bucket that is swingably mounted on an arm.

図４を参照して説明する。周知の例えば油圧ショベルは、作業腕装置のアーム２の先端にピン４により揺動自在に取り付けたバケット６を備えている。バケット６はアーム２に装備したバケット作動シリンダ８を伸縮させることにより、バケット６とバケット作動シリンダ８を結ぶバケットリンク１０を介して揺動作動される（例えば、特許文献１参照）。 This will be described with reference to FIG. A well-known hydraulic excavator, for example, includes a bucket 6 that is swingably attached to a tip of an arm 2 of a working arm device by a pin 4. The bucket 6 is oscillated by a bucket link 10 connecting the bucket 6 and the bucket operating cylinder 8 by expanding and contracting the bucket operating cylinder 8 mounted on the arm 2 (see, for example, Patent Document 1).

バケットリンク１０は、一端をバケット６の、揺動中心であるピン４から離れた部位に回動自在に連結したパワーリンク１２と、このパワーリンク１２の他端とバケット作動シリンダ８のロッド８ａとの連結部に、一端を同一軸線上でピン１４によって回動自在に連結し、他端をアーム２にピン１６によって回動自在に連結したアイドラリンク１８を備えている。アイドラリンク１８は、アーム２のピン１６が伸びる方向の両側に実質上同一のものが一対備えられている。 The bucket link 10 includes a power link 12 having one end pivotably connected to a portion of the bucket 6 away from the pin 4 that is the center of swing, the other end of the power link 12, and a rod 8a of the bucket operating cylinder 8. An idler link 18 having one end rotatably connected to the connecting portion by a pin 14 on the same axis and the other end rotatably connected to the arm 2 by a pin 16 is provided. A pair of the idler links 18 that are substantially the same are provided on both sides of the arm 2 in the direction in which the pins 16 extend.

アイドラリンク１８は、鋼板を切断成形して両端部に連結用のピン孔２０、２２を有した帯状に形成されている。帯形状の、バケット５に隣接する縁部には、バケット作動シリンダ８を伸張させバケット６を、ピン４を中心に揺動させ、開口部６ａをアーム２側に巻込んだ状態（図４の状態）において、バケット６のピン４取付部と干渉しないように窪んだ凹部１８ａが形成されている。
特開２００２−１８０４９３号公報（第１１図） The idler link 18 is formed in a strip shape by cutting and forming a steel plate and having connecting pin holes 20 and 22 at both ends. At the edge of the belt shape adjacent to the bucket 5, the bucket operating cylinder 8 is extended, the bucket 6 is swung around the pin 4, and the opening 6a is wound around the arm 2 (see FIG. 4). In the state), a recessed portion 18a that is recessed so as not to interfere with the pin 4 mounting portion of the bucket 6 is formed.
JP 2002-180493 A (FIG. 11)

上述したとおりの形態の従来のバケットのアイドラリンクには、次のとおりの解決すべき課題がある。 The conventional bucket idler link of the form as described above has the following problems to be solved.

アイドラリンク１８には、バケット作動シリンダ８によるバケット６の掘削力、あるいはバケット６からの負荷反力が、両端のピン１４、１６を介し引張力あるいは圧縮力として繰り返し作用する。この力は、アイドラリンク１８の凹部１８ａ、特にピン孔２０、２２に近いＲ部分に応力集中を発生させ、アイドラリンク１８の強度および寿命を低下させる原因になっている。アイドラリンク１８の強度を向上させるには、より厚い鋼板材料を使用する、応力が集中するＲ部分の仕上精度を向上させる、などの製作上の問題があった。 The idler link 18 is repeatedly subjected to the excavating force of the bucket 6 by the bucket operating cylinder 8 or the load reaction force from the bucket 6 as tensile force or compressive force via the pins 14 and 16 at both ends. This force causes stress concentration in the recess 18 a of the idler link 18, particularly in the R portion near the pin holes 20 and 22, thereby reducing the strength and life of the idler link 18. In order to improve the strength of the idler link 18, there are manufacturing problems such as using a thicker steel plate material and improving the finishing accuracy of the R portion where stress is concentrated.

本発明は上記事実に鑑みてなされたもので、その技術的課題は、バケットを揺動させるバケットリンクに備えるアイドラリンクの強度を、比較的簡単な構造で向上させることである。 The present invention has been made in view of the above-described facts, and a technical problem thereof is to improve the strength of an idler link provided in a bucket link that swings the bucket with a relatively simple structure.

本発明によれば上記技術的課題を解決するバケットのアイドラリンクとして、アームの先端に揺動自在に装備したバケットに連結するパワーリンクとアームに装備したバケット作動シリンダの連結部に一端が回動自在に連結し、他端がアームに回動自在に連結するアイドラリンクが、両端部に連結用のピン孔を有して延びる平板状のリンク本体と、リンク本体の片面の一対のピン孔間のピン孔それぞれの中心を結ぶ線上に一体的に立設した帯状の補強板とを備え、リンク本体が、両端部それぞれに形成した円弧の縁部と、該中心を結ぶ線に実質上平行に一側に延びる直線部を有して一対の円弧縁部それぞれから山形に突出した山形縁部と、該中心を結ぶ線に実質上平行に他側に延びる直線部を有して一対の円弧縁部それぞれから谷形に窪んだ谷形縁部とを備えている、ことを特徴とするバケットのアイドラリンクが提供される。 According to the present invention, as an idler link of a bucket that solves the above technical problem, one end pivots on a connecting portion of a bucket operating cylinder equipped on the arm and a power link that is coupled to a bucket that is swingably equipped on the tip of the arm. The idler link, which is freely connected and the other end is rotatably connected to the arm, has a flat link main body extending with connecting pin holes at both ends, and a pair of pin holes on one side of the link main body. A belt-shaped reinforcing plate integrally standing on a line connecting the centers of the pin holes, and the link main body is substantially parallel to the edge of the arc formed on each of both ends and the line connecting the centers. A pair of arc edges having a linear portion extending to one side and protruding from each of the pair of arc edges and a linear portion extending to the other side substantially parallel to a line connecting the centers Recessed from each part into a valley shape And a Katachien unit, idler link bucket is provided, characterized in that.

本発明に従って構成されたバケットのアイドラリンクは、両端に連結用のピン孔を有して延びる平板帯状のリンク本体が、バケットとの干渉防止用の窪んだ谷形縁部を備えるとともに他側に突出した山形縁部を備え、さらに補強板を一対のピン孔間にリンク本体に一体的に備えている。したがって、アイドラリンクに作用する引張力あるいは圧縮力に対し、より厚い鋼板材料を使うことなく、また縁部の仕上精度を格別に向上させることなく、簡単な構造で強度を増加させることができる。 The bucket idler link constructed in accordance with the present invention has a plate-like link body extending with connecting pin holes at both ends, and a recessed valley edge for preventing interference with the bucket and on the other side. A protruding chevron edge is provided, and a reinforcing plate is provided integrally with the link body between the pair of pin holes. Therefore, it is possible to increase the strength with a simple structure without using a thicker steel plate material and without particularly improving the finishing accuracy of the edge portion against the tensile force or compressive force acting on the idler link.

以下、本発明に従って構成されたバケットのアイドラリンクについて、アームの先端にバケットを装備した作業機械の代表例である油圧ショベルにおける好適実施形態を図示している添付図面を参照して、さらに詳細に説明する。 Hereinafter, the idler link of a bucket constructed according to the present invention will be described in further detail with reference to the accompanying drawings illustrating a preferred embodiment of a hydraulic excavator that is a representative example of a work machine equipped with a bucket at the tip of an arm. explain.

なお、図１〜図３において、図４と実質上同一の部分は同一の符号で示されている。 1 to 3, substantially the same parts as those in FIG. 4 are denoted by the same reference numerals.

図２および図３を参照して説明する。図３に番号２４で示す油圧ショベルは、下部走行体２６の上に上部旋回体２８を旋回自在に備え、上部旋回体２８は、運転室３０、エンジン室３２などとともに、多関節の作業腕装置３４を備えている。 This will be described with reference to FIGS. The hydraulic excavator denoted by reference numeral 24 in FIG. 3 includes an upper swing body 28 that can freely pivot on a lower traveling body 26. The upper swing body 28 is an articulated work arm device together with an operator cab 30, an engine compartment 32, and the like. 34 is provided.

作業腕装置３４は、上部旋回体２８に上下方向に揺動自在に取り付けたブーム３４ａ、ブーム３４ａの先端に上下方向に揺動自在に取り付けたアーム２、アーム２の先端に上下方向に揺動自在に取り付けたバケット６を備え、上部旋回体２８とブーム３４ａの間には一対のブーム作動シリンダ３４ｂ、３４ｂ、ブーム３４ａとアーム２の間にはアーム作動シリンダ３４ｃ、アーム２とバケット６の間にはバケットリンク１０を介してバケット作動シリンダ８を備えている。 The work arm device 34 includes a boom 34a attached to the upper swing body 28 so as to be swingable in the vertical direction, an arm 2 attached to the tip of the boom 34a so as to be swingable in the vertical direction, and swings up and down at the tip of the arm 2. A bucket 6 that is freely attached is provided, a pair of boom operating cylinders 34b and 34b are provided between the upper swing body 28 and the boom 34a, an arm operating cylinder 34c is provided between the boom 34a and the arm 2, and an arm operating cylinder 34c is provided between the arm 2 and the bucket 6. Is provided with a bucket operating cylinder 8 via a bucket link 10.

主として図２を参照して説明する。バケット６はアーム２の先端にピン４によって揺動自在に取り付けられている。バケットリンク１０は、一端を、バケット６のピン４から離れた部位にピン５により回動自在に連結したパワーリンク１２と、このパワーリンク１２の他端とバケット作動シリンダ８のロッド８ａとの連結部に、一端を同一軸線上でピン１４により回動自在に連結し、他端をアーム２にピン１６により回動自在に連結したアイドラリンク３６を備えている。アイドラリンク３６は、ピン１６が伸びる方向のアーム２の両側に一対、実質上対称に形成され備えられている。 A description will be given mainly with reference to FIG. The bucket 6 is swingably attached to the tip of the arm 2 by a pin 4. The bucket link 10 has a power link 12 having one end rotatably connected to a portion of the bucket 6 away from the pin 4 by a pin 5, and a connection between the other end of the power link 12 and the rod 8 a of the bucket operating cylinder 8. The part is provided with an idler link 36 having one end rotatably connected on the same axis by a pin 14 and the other end rotatably connected to the arm 2 by a pin 16. A pair of idler links 36 are formed substantially symmetrically on both sides of the arm 2 in the direction in which the pins 16 extend.

バケット６は、ピン４を中心に、バケット作動シリンダ８を伸張作動させると矢印Ｙ１で示す時計方向に、収縮作動させると矢印Ｙ２で示す反時計方向にそれぞれ揺動する。図２はバケット６をＹ１方向に一杯に揺動させ、開口部６ａをアーム２側に巻込んだ状態を示している。 The bucket 6 swings around the pin 4 in the clockwise direction indicated by the arrow Y1 when the bucket operating cylinder 8 is extended, and in the counterclockwise direction indicated by the arrow Y2 when contracted. FIG. 2 shows a state in which the bucket 6 is fully swung in the Y1 direction and the opening 6a is wound around the arm 2 side.

アイドラリンク３６について図１を参照して説明する。アイドラリンク３６は、両端部に連結用のピン孔２０、２２を有して延びる平板状のリンク本体３６ａと、リンク本体３６ａの片面の一対のピン孔２０、２２間のピン孔それぞれの中心を結ぶ線Ｘ上に一体的に溶接され立設した矩形帯状の補強板３６ｂを備えている。 The idler link 36 will be described with reference to FIG. The idler link 36 has a flat link main body 36a extending with connecting pin holes 20 and 22 at both ends and a center of each pin hole between a pair of pin holes 20 and 22 on one side of the link main body 36a. A rectangular belt-shaped reinforcing plate 36b is provided which is integrally welded and erected on the connecting line X.

リンク本体３６ａは、両端部それぞれに形成した円弧の縁部Ｅ１、Ｅ２と、中心を結ぶ線Ｘに実質上平行に一側に延びる直線部Ｓ１を有して一対の円弧縁部Ｅ１、Ｅ２それぞれから山形に突出した山形縁部Ｅ３と、中心を結ぶ線Ｘに実質上平行に他側に延びる直線部Ｓ２を有して一対の円弧縁部Ｅ１、Ｅ２それぞれから谷形に窪んだ谷形縁部Ｅ４を備えている。 The link body 36a has arc edges E1 and E2 formed at both ends, and a straight line portion S1 extending to one side substantially parallel to the line X connecting the centers, and a pair of arc edges E1 and E2 respectively. A valley-shaped edge that has a mountain-shaped edge E3 that protrudes in a mountain-shaped manner and a straight line S2 that extends to the other side substantially parallel to the line X that connects the centers, and that is recessed from each of the pair of arc edges E1 and E2 in a valley shape Part E4 is provided.

山形縁部Ｅ３の直線部Ｓ１の両端は、一対の円弧縁部Ｅ１、Ｅ２に接する直線により接続されている。谷形縁部Ｅ４の直線部Ｓ２の両端は、一対の円弧縁部Ｅ１、Ｅ２に接するＲにより滑らかに接続されている。 Both ends of the straight line part S1 of the chevron edge part E3 are connected by a straight line in contact with the pair of arc edge parts E1 and E2. Both ends of the straight line portion S2 of the valley-shaped edge portion E4 are smoothly connected by R in contact with the pair of arc edge portions E1 and E2.

谷形縁部Ｅ４は、バケット６を、ピン４を中心に揺動させ開口部６ａをアーム２側に巻込んだ状態（図２の状態）において、バケット６のピン４取付部と干渉しないように形成されている。 The valley-shaped edge portion E4 does not interfere with the pin 4 mounting portion of the bucket 6 in a state where the bucket 6 is swung around the pin 4 and the opening 6a is wound on the arm 2 side (state in FIG. 2). Is formed.

上述したとおりのバケットのアイドラリンク３６の作用効果について説明する。 The effect of the idler link 36 of the bucket as described above will be described.

バケットのアイドラリンク３６は、両端に連結用のピン孔２０，２２を有して延びる平板帯状のリンク本体３６ａに、バケット６との干渉を防止するための窪んだ谷形縁部Ｅ４を備えるとともに、他側に突出した山形縁部Ｅ３を備え、さらに一対のピン孔２０，２２の間にリンク本体３６ａに一体的に設けた補強板３６ｂを備えている。したがって、一対のピン孔２０、２２間に作用する引張力あるいは圧縮力に対して、より厚い鋼板材料を使うことなく、また仕上精度を向上させることなく、簡単な構造で強度を増加させることができる。 The bucket idler link 36 includes a flat strip-shaped link main body 36a having connecting pin holes 20 and 22 at both ends and a recessed valley-shaped edge E4 for preventing interference with the bucket 6. Further, an angled edge E3 protruding to the other side is provided, and a reinforcing plate 36b provided integrally with the link body 36a is provided between the pair of pin holes 20 and 22. Therefore, it is possible to increase the strength with a simple structure without using a thicker steel plate material and without improving the finishing accuracy with respect to the tensile force or compressive force acting between the pair of pin holes 20 and 22. it can.

本発明に従って構成されたバケットのアイドラリンクの、（ａ）は正面図、（ｂ）はＡ−Ａ矢印方向に見た側面図、（ｃ）はＢ−Ｂ矢印方向に見た断面図。BRIEF DESCRIPTION OF THE DRAWINGS (a) is a front view of the bucket idler link comprised according to this invention, (b) is the side view seen in the AA arrow direction, (c) is sectional drawing seen in the BB arrow direction. 図１に示すアイドラリンクを備えたアームの先端部分の側面図。The side view of the front-end | tip part of the arm provided with the idler link shown in FIG. 図１に示すアイドラリンクを備えた油圧ショベルの斜視図。The perspective view of the hydraulic excavator provided with the idler link shown in FIG. 従来のアイドラリンクを備えたアームの先端部分の側面図。The side view of the front-end | tip part of the arm provided with the conventional idler link.

符号の説明Explanation of symbols

２：アーム
６：バケット
８：バケット作動シリンダ
１２：パワーリンク
２０：ピン孔
２２：ピン孔
３６：アイドラリンク
３６ａ：リンク本体
３６ｂ：補強板
Ｅ１、Ｅ２：円弧縁部
Ｅ３：山形縁部
Ｅ４：谷形縁部
Ｓ１、Ｓ２：直線部
Ｘ：中心を結ぶ線 2: Arm 6: Bucket 8: Bucket working cylinder 12: Power link 20: Pin hole 22: Pin hole 36: Idler link 36a: Link body 36b: Reinforcement plate E1, E2: Arc edge E3: Angle edge E4: Valley Edges S1, S2: Straight line X: Line connecting the centers

Claims (1)

アームの先端に揺動自在に装備したバケットに連結するパワーリンクとアームに装備したバケット作動シリンダの連結部に一端が回動自在に連結し、他端がアームに回動自在に連結するアイドラリンクが、
両端部に連結用のピン孔を有して延びる平板状のリンク本体と、
リンク本体の片面の一対のピン孔間のピン孔それぞれの中心を結ぶ線上に一体的に立設した帯状の補強板とを備え、
リンク本体が、
両端部それぞれに形成した円弧の縁部と、
該中心を結ぶ線に実質上平行に一側に延びる直線部を有して一対の円弧縁部それぞれから山形に突出した山形縁部と、
該中心を結ぶ線に実質上平行に他側に延びる直線部を有して一対の円弧縁部それぞれから谷形に窪んだ谷形縁部とを備えている、
ことを特徴とするバケットのアイドラリンク。 An idler link with one end pivotably connected to the connecting portion of the bucket operating cylinder equipped with the power link coupled to the bucket equipped to swing freely at the tip of the arm and the other end pivotally coupled to the arm. But,
A flat link body extending at both ends with connecting pin holes; and
A belt-shaped reinforcing plate integrally standing on a line connecting the centers of the pin holes between a pair of pin holes on one side of the link body;
The link body
The edge of the arc formed on each end;
A chevron edge projecting in a chevron shape from each of the pair of arc edges, having a linear part extending to one side substantially parallel to the line connecting the centers;
A trough-shaped edge having a linear portion extending to the other side substantially parallel to the line connecting the centers and recessed in a trough from each of the pair of arc edges;
The idler link of the bucket characterized by that.
JP2006143806A 2006-05-24 2006-05-24 Bucket idler link Active JP4716923B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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EP3620580A1 (en) 2018-09-06 2020-03-11 Takeuchi Mfg. Co., Ltd. Working device

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Publication number Priority date Publication date Assignee Title
JP2011256624A (en) * 2010-06-10 2011-12-22 Kobelco Contstruction Machinery Ltd Work attachment and construction machine
EP3620580A1 (en) 2018-09-06 2020-03-11 Takeuchi Mfg. Co., Ltd. Working device
US10640948B2 (en) 2018-09-06 2020-05-05 Takeuchi Mfg. Co., Ltd. Working device

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