JP2013209862A - Work device for work machine - Google Patents

Work device for work machine Download PDF

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JP2013209862A
JP2013209862A JP2012081531A JP2012081531A JP2013209862A JP 2013209862 A JP2013209862 A JP 2013209862A JP 2012081531 A JP2012081531 A JP 2012081531A JP 2012081531 A JP2012081531 A JP 2012081531A JP 2013209862 A JP2013209862 A JP 2013209862A
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boom
reinforcing
fixed
fixing
pipe
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JP5665790B2 (en
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Kazuaki Shobu
和晃 菖蒲
Hiroya Hanano
浩也 花野
Tokio Sakata
登喜夫 坂田
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Kubota Corp
株式会社クボタ
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Abstract

PROBLEM TO BE SOLVED: To enable local overstress applied to the middles of bottom wall fixed parts of reinforcing members to be distributed around the bottom wall fixed parts.SOLUTION: A boom 3 is cylindrically formed with right and left side walls 3A, a top wall 3B and a bottom wall 3C, reinforcing members 8 fixed to the side walls 3A and the bottom wall 3C are provided inside the boom 3, and bottom wall fixed parts 8a of the reinforcing members 8 are arranged overlapping the longitudinal ends of a lower connector 4 fixed to the bottom wall 3C. In the middles of overlapping portions of the bottom wall fixed parts 8a of the reinforcing members 8, relief parts 9 are formed which are opposed to an end part edge of the lower connector 4 and isolated from the bottom wall 3C.

Description

本発明は、バックホー、パワーショベル、フロントローダ、ホイールローダ等作業機の作業装置に関する。   The present invention relates to a working device for a working machine such as a backhoe, a power shovel, a front loader, a wheel loader.
バックホー等の作業機は、ブームの先端側に作業具を有する作業装置を備えている。特許文献1に開示されている作業装置のブームは、基部が移動機体に横軸を介して昇降自在に支持され、ブームの中途屈曲部下面側に設けた下側取付板(下連結体)にブーム昇降用の昇降シリンダを連結し、ブームの中途屈曲部上面側に設けた上側取付板(上連結体)にブームの先端側に連結された作業具を回動する回動シリンダを連結しており、前記ブームを左右側面板(側壁)、背面板(天壁)及び前面板(底壁)を有して断面四角形の筒形状に形成しており、前記ブームの内部で前面板及び左右側面板に前後補強部材を固着し、この前側補強部材の補強座(底壁固着部)を前面板に固着された下側取付板の前後方向の端部と重合配置している。   A working machine such as a backhoe includes a working device having a working tool on the tip side of the boom. The boom of the working device disclosed in Patent Document 1 is supported by a lower mounting plate (lower coupling body) provided on the lower surface side of the middle bent portion of the boom, the base portion of which is supported by the mobile body so as to be movable up and down via a horizontal axis. A lifting cylinder for raising and lowering the boom is connected, and an upper mounting plate (upper connecting body) provided on the upper surface side of the middle bent portion of the boom is connected to a rotating cylinder for rotating a work tool connected to the tip end side of the boom. The boom has a left and right side plate (side wall), a back plate (top wall), and a front plate (bottom wall), and is formed in a rectangular cross-sectional shape. The front and rear reinforcing members are fixed to the face plate, and the reinforcing seat (bottom wall fixing portion) of the front reinforcing member is overlapped with the front and rear end portions of the lower mounting plate fixed to the front plate.
前記ブームの内部の補強部材は、掘削等の作業時の昇降シリンダの伸縮によって、ブームの中途屈曲部の下連結体に推力が加わるので、中途屈曲部の断面強度を確保するために設けられている。   The reinforcing member inside the boom is provided in order to secure the cross-sectional strength of the mid-bend portion because the thrust is applied to the lower connecting portion of the mid-bend portion of the boom by the expansion and contraction of the lifting cylinder during work such as excavation. Yes.
実用新案登録第2524229号公報Utility Model Registration No. 2524229
前記先行技術のブーム内部の前側補強部材は、補強座を形成して下連結体の前端部と重合させることにより、高応力箇所となる下連結体の前端部をより強力に補強することができるが、下連結体は前後方向中央から端部へいくに従って断面係数が小さくなっていて、補強部材に過大な負荷がかかると、下連結体の端部縁に対向する補強座の溶接部分がブーム内部で損傷する可能性がある。   The front side reinforcing member inside the boom of the prior art can reinforce the front end portion of the lower connecting body, which becomes a high stress location, by reinforcing the front end portion of the lower connecting body by forming a reinforcing seat. However, the lower connecting body has a smaller section modulus as it goes from the center in the front-rear direction to the end, and if an excessive load is applied to the reinforcing member, the welded portion of the reinforcing seat facing the end edge of the lower connecting body There is a possibility of internal damage.
そこで、補強部材にも強度を持たせるために板厚を厚くすることが考えられるが、補強部材の板厚を厚くすると、重量が増大し、掘削作業時の安定性が低下したり、操作フィーリングが悪化したり等、別の問題が発生することがある。
本発明は、このような従来技術の問題点を解決できるようにした作業機の作業装置を提供することを目的とする。
Therefore, it is conceivable to increase the thickness of the reinforcing member in order to give strength to the reinforcing member. However, increasing the thickness of the reinforcing member increases the weight, reduces the stability during excavation work, Other problems may occur, such as deterioration of the ring.
It is an object of the present invention to provide a working device for a working machine that can solve such problems of the prior art.
本発明は、下連結体の端部縁から底壁を介して補強部材の底壁固着部の中途部に加わる局部的過大な応力を、底壁固着部の周囲に分散すことができるようにした作業機の作業装置を提供することを目的とする。   In the present invention, it is possible to disperse the local excessive stress applied to the middle portion of the bottom wall fixing portion of the reinforcing member from the end edge of the lower connecting body through the bottom wall around the bottom wall fixing portion. It is an object to provide a working device for a working machine.
本発明における課題解決のための具体的手段は、次の通りである。
第1に、移動機体Tに横軸2を介して昇降自在に側面視くの字状のブーム3の基部を支持し、ブーム3の中途屈曲部下面側に設けた下連結体4にブーム昇降用の昇降シリンダ5の先端を連結しており、
前記ブーム3を左右側壁3A、天壁3B及び底壁3Cを有して筒形状に形成し、このブーム3の内部に側壁3Aと底壁3Cとに固着された補強部材8を設け、この補強部材8の底壁固着部8aを底壁3Cに固着された下連結体4の前後方向の端部と重合配置しており、
前記補強部材8の底壁固着部8aの重合部分の中途部に、下連結体4の端部縁に対向していて底壁3Cから離隔した逃げ部9を形成していることを特徴とする。
Specific means for solving the problems in the present invention are as follows.
First, the mobile body T supports the base of a B-shaped boom 3 that can be moved up and down through the horizontal shaft 2, and the boom is moved up and down on the lower connecting body 4 provided on the lower surface side of the middle bent portion of the boom 3. Connecting the tip of the lifting cylinder 5 for
The boom 3 is formed in a cylindrical shape having left and right side walls 3A, a top wall 3B and a bottom wall 3C, and a reinforcing member 8 fixed to the side walls 3A and the bottom wall 3C is provided inside the boom 3, and this reinforcement is performed. The bottom wall fixing portion 8a of the member 8 is overlapped with the front and rear end portions of the lower connector 4 fixed to the bottom wall 3C,
In the middle portion of the overlapping portion of the bottom wall fixing portion 8a of the reinforcing member 8, a relief portion 9 that is opposed to the end edge of the lower connector 4 and is separated from the bottom wall 3C is formed. .
第2に、前記補強部材8をブーム3の内部に前後2部材配置し、前補強部材8Fの底壁固着部8afを下連結体4の前端部と重合配置し、後補強部材8Rの底壁固着部8arを下連結体4の後端部と重合配置していることを特徴とする。
第3に、前記補強部材8の底壁固着部8aは、前後方向中途部を底壁3Cから離れる方向に屈曲して逃げ部9を形成していることを特徴とする。
Secondly, the reinforcing member 8 is arranged in the front and rear two members inside the boom 3, the bottom wall fixing portion 8af of the front reinforcing member 8F is overlapped with the front end portion of the lower connector 4, and the bottom wall of the rear reinforcing member 8R is arranged. The fixing portion 8ar is overlapped with the rear end portion of the lower connector 4.
Thirdly, the bottom wall fixing portion 8a of the reinforcing member 8 is characterized in that a relief portion 9 is formed by bending a midway portion in the front-rear direction in a direction away from the bottom wall 3C.
本発明によれば、補強部材の底壁固着部の中途部に加わる局部的過大な応力を、底壁固着部の周囲に分散することができる。
即ち、請求項1に係る発明によれば、底壁固着部8aが底壁3Cに固着された下連結体4の前後方向の端部と重合配置した補強部材8は、底壁固着部8aの重合部分の中途部に下連結体4の端部縁に対向していて底壁3Cから離隔した逃げ部9を形成しているので、下連結体4の端部の縁から底壁固着部8aに加わる局部的過大な応力は逃げ部9に伝わらなく、逃げ部9の周囲の広い範囲に拡散して伝わらせることができ、補強部材8は板厚を厚くすることなく耐久性を向上できる。
According to the present invention, local excessive stress applied to the middle part of the bottom wall fixing part of the reinforcing member can be distributed around the bottom wall fixing part.
That is, according to the first aspect of the present invention, the reinforcing member 8 that is overlapped with the end portion in the front-rear direction of the lower connecting body 4 in which the bottom wall fixing portion 8a is fixed to the bottom wall 3C is provided on the bottom wall fixing portion 8a. Since the escape portion 9 that faces the end edge of the lower connector 4 and is separated from the bottom wall 3C is formed in the middle of the overlapped portion, the bottom wall fixing portion 8a extends from the edge of the end of the lower connector 4. The excessive local stress applied to the flank 9 is not transmitted to the escape portion 9 but can be diffused and transmitted to a wide area around the escape portion 9, and the reinforcing member 8 can improve durability without increasing the plate thickness.
請求項2に係る発明によれば、ブーム3の内部に前後2部材の補強部材8を配置して、それぞれ下連結体4の前後端部と重合させるので、下連結体4の前後両端部の縁から底壁固着部8aに加わる局部的過大な応力を逃げ部9で拡散して支持することができる。
請求項3に係る発明によれば、補強部材8の底壁固着部8aの逃げ部9は、前後方向中途部を底壁3Cから離れる方向に屈曲して簡単に形成することができる。
According to the second aspect of the present invention, the reinforcing members 8 of the two front and rear members are arranged inside the boom 3 and overlap with the front and rear end portions of the lower connecting body 4, respectively. Local excessive stress applied from the edge to the bottom wall fixing portion 8a can be diffused and supported by the escape portion 9.
According to the third aspect of the present invention, the relief portion 9 of the bottom wall fixing portion 8a of the reinforcing member 8 can be easily formed by bending a midway portion in the front-rear direction in a direction away from the bottom wall 3C.
本発明の実施の形態を示す作業機の作業装置の側面図である。It is a side view of the working device of the working machine which shows embodiment of this invention. ブームの側面図である。It is a side view of a boom. ブームの断面側面図である。It is a cross-sectional side view of a boom. 作業装置の斜視図である。It is a perspective view of a working device. 図2のX矢視図である。FIG. 本発明の変形例を示すブームの断面側面図である。It is a cross-sectional side view of the boom which shows the modification of this invention. 図5のY−Y線断面図である。FIG. 6 is a cross-sectional view taken along line YY in FIG. 5. 配管装着具の第2例を示す平面図である。It is a top view which shows the 2nd example of a piping mounting tool. 配管装着具の第2例を示す断面図である。It is sectional drawing which shows the 2nd example of a piping mounting tool. 配管装着具の第3例を示す平面図である。It is a top view which shows the 3rd example of a piping mounting tool. 配管装着具の第4例を示す平面図である。It is a top view which shows the 4th example of a piping mounting tool. 作業装置を備えた作業機の側面図である。It is a side view of the working machine provided with the working device.
以下、本発明の実施の形態を図面に基づいて説明する。
図12において、符号20は土木、建設等に使用される作業機としてのバックホーであり、クローラ走行部21を有する走行機体22に旋回台23が縦軸回り回転自在に支持され、旋回台23上にエンジン24、運転席を包囲するキャビン25及び車両機器等が搭載されて移動機体Tを構成し、移動機体Tの前部に掘削作業をする作業装置1を装着している。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 12, reference numeral 20 denotes a backhoe as a work machine used for civil engineering, construction, and the like. A swivel base 23 is supported on a travel machine body 22 having a crawler travel unit 21 so as to be rotatable about a vertical axis. In addition, an engine 24, a cabin 25 that surrounds the driver's seat, vehicle equipment, and the like are mounted to constitute a mobile machine body T, and a work device 1 that performs excavation work is mounted on the front of the mobile machine body T.
前記作業装置1は、旋回台23の前部の支持ブラケット26にスイングブラケット27が縦軸回りスイング揺動自在に枢支され、このスイングブラケット27にブーム3と昇降シリンダ5の各基部が横軸回り上下揺動自在に枢支され、ブーム3の先端に回動シリンダ7によって駆動されるアーム28が上下回動自在に枢支され、アーム28の先端に作業具シリンダ29によって駆動されるバケット等の作業具Sが掬い・ダンプ動作自在に枢支されている。前記回動シリンダ7は、ブーム3の先端側にアーム28を介して連結された作業具Sを上下方向(又は前後方向)に移動可能にしている。   In the working device 1, a swing bracket 27 is pivotally supported by a support bracket 26 at the front portion of the swivel base 23 so as to be swingable and swingable about a vertical axis, and the base portions of the boom 3 and the lifting cylinder 5 are abscissaed to the swing bracket 27. An arm 28 that is pivotally pivoted up and down and driven by the rotating cylinder 7 at the tip of the boom 3 is pivotally pivoted up and down, and a bucket that is driven by the work tool cylinder 29 at the tip of the arm 28 The work tool S is pivotally supported so that it can be scooped and dumped. The rotating cylinder 7 enables the work tool S connected to the distal end side of the boom 3 via an arm 28 to move in the vertical direction (or the front-rear direction).
図1〜4、12において、前記ブーム3は、前後方向(長手方向)の中途部が側面視くの字状に屈曲されており、本体部分が左右側及び天底を板材で形成し、左右側壁3A、天壁3B及び底壁3Cを有して断面四角形の筒形状になっている。
ブーム3の本体部分の基部に基部連結体3Dが溶接により固着されて横軸2を介してスイングブラケット27に枢支され、本体部分の先端部に先端連結体3Eが固着されて支軸30を介してアーム28の基部を枢支している。
1 to 4 and 12, the boom 3 is bent in the shape of a square in which the middle part in the front-rear direction (longitudinal direction) is seen from the side, the main body part is formed of plate material on the left and right sides and the nadir, It has a side wall 3A, a top wall 3B, and a bottom wall 3C, and has a rectangular cross section.
A base connecting body 3D is fixed to the base portion of the main body portion of the boom 3 by welding and is pivotally supported by the swing bracket 27 via the horizontal shaft 2, and a front end connecting body 3E is fixed to the front end portion of the main body portion to support the support shaft 30. The base of the arm 28 is pivotally supported.
ブーム3の中途屈曲部の下面側(底壁3Cの下面)には、下向き鶏冠形状(略三角形状
)の左右一対の板材を溶接により固着した下連結体4が設けられており、この下連結体4にブーム昇降用の昇降シリンダ5の先端が下ピン31を介して連結されている。
ブーム3の中途屈曲部の上面側(天壁3Bの上面)には、上向き鶏冠形状(略台形状)の左右一対の板材を固着した上連結体6が設けられており、この上連結体6にブーム3の先端側に連結されたアーム28を回動する回動シリンダ7の基部が上ピン32を介して連結されている。
On the lower surface side of the middle bent portion of the boom 3 (the lower surface of the bottom wall 3C), there is provided a lower connecting body 4 in which a pair of left and right plate members of a downward facing crown shape (substantially triangular shape) are fixed by welding. The tip of a lifting cylinder 5 for lifting the boom is connected to the body 4 via a lower pin 31.
On the upper surface side of the middle bent portion of the boom 3 (the upper surface of the top wall 3B), an upper connecting body 6 is provided, to which a pair of left and right plate members having an upward facing crown shape (substantially trapezoidal shape) are fixed. The base of the rotating cylinder 7 that rotates the arm 28 connected to the tip end side of the boom 3 is connected via an upper pin 32.
筒形状のブーム3内には補強部材8が設けられている。この補強部材8は前後一対あってブーム3内を前後方向3区分する仕切板であり、ブーム3の補強もしている。
前後各補強部材8F、8Rは板材で形成され、左右両端が左右側壁3Aと溶接により固着され、下端が底壁3Cと溶接により固着され、上端はL字状に屈曲されて天壁3Bに近接されている。
A reinforcing member 8 is provided in the cylindrical boom 3. This reinforcing member 8 is a partition plate that is a pair of front and rear and divides the inside of the boom 3 into three in the front-rear direction, and also reinforces the boom 3.
The front and rear reinforcing members 8F and 8R are formed of a plate material, the left and right ends are fixed to the left and right side walls 3A by welding, the lower ends are fixed to the bottom wall 3C by welding, and the upper ends are bent in an L shape and close to the top wall 3B. Has been.
前補強部材8Fは平板状の中途部から下部がL字状に屈曲されて、底壁3Cの上面に沿って固着される底壁固着部8afが形成されており、この底壁固着部8afは下連結体4の前後方向の前端部と重合配置されている。
前記下連結体4の前後方向の前端部と重合している前補強部材8Fの底壁固着部8afの重合部分は、前後方向中途部に、下連結体4の前端部縁に対向していて底壁3Cから離隔した逃げ部9が形成されている。
The front reinforcing member 8F is bent in an L shape from the flat middle part to form a bottom wall fixing portion 8af fixed along the upper surface of the bottom wall 3C. The bottom wall fixing portion 8af is A front end portion of the lower connector 4 in the front-rear direction is overlapped.
The overlapping portion of the bottom wall fixing portion 8af of the front reinforcing member 8F overlapped with the front end portion in the front-rear direction of the lower connecting body 4 is opposed to the front end edge of the lower connecting body 4 in the middle portion in the front-rear direction. An escape portion 9 is formed that is separated from the bottom wall 3C.
この逃げ部9は、L字状に屈曲した板材の下部の前後方向中途部を、底壁3Cから離れる方向(上方向)に略V字状又は略U字状に屈曲して形成したものであり、側壁3Aと固着されているが底壁3Cとは固着されていない。
従って、断面係数が急激に小さくなる下連結体4の端部の縁から、底壁3Cを介して底壁固着部8afに加わる局部的過大な応力は、底壁固着部8afの中でも逃げ部9には伝わらなく(応力が逃げ)、底壁固着部8afの中で底壁3Cと固着された逃げ部9の前後部位等の周囲部位で応力が伝達され、この周囲部位は下連結体4の端部縁と対向する部位より広く、よって応力は広い範囲に拡散して伝わることになる。
The escape portion 9 is formed by bending a midway portion in the front-rear direction of the lower portion of the plate material bent in an L shape into a substantially V shape or a substantially U shape in a direction away from the bottom wall 3C (upward direction). Yes, it is fixed to the side wall 3A but not to the bottom wall 3C.
Therefore, the local excessive stress applied to the bottom wall fixing portion 8af from the edge of the end portion of the lower coupling body 4 where the section modulus becomes abruptly reduced via the bottom wall 3C is caused by the escape portion 9 in the bottom wall fixing portion 8af. The stress is transmitted to surrounding parts such as the front and rear parts of the relief part 9 fixed to the bottom wall 3C in the bottom wall fixing part 8af. It is wider than the part facing the edge of the edge, so that the stress is diffused and transmitted over a wide range.
後補強部材8Rも前補強部材8Fと同様に、平板状の中途部から下部がL字状に屈曲されて、底壁3Cの上面に沿って固着される底壁固着部8arが形成されており、この底壁固着部8arは下連結体4の前後方向の後端部と重合配置されている。
前記下連結体4の前後方向の後端部と重合している後補強部材8Rの底壁固着部8arの重合部分は、前後方向中途部に、下連結体4の後端部縁に対向していて底壁3Cから離隔した逃げ部9が形成されている。
Similarly to the front reinforcing member 8F, the rear reinforcing member 8R is bent in an L shape from a flat plate-like middle portion to form a bottom wall fixing portion 8ar fixed along the upper surface of the bottom wall 3C. The bottom wall fixing portion 8ar is overlapped with the rear end portion of the lower connecting body 4 in the front-rear direction.
The overlapping portion of the bottom wall fixing portion 8ar of the rear reinforcing member 8R that overlaps with the rear end portion in the front-rear direction of the lower connector 4 faces the rear end edge of the lower connector 4 in the middle portion in the front-rear direction. An escape portion 9 is formed that is spaced from the bottom wall 3C.
この逃げ部9は、L字状に屈曲した板材の下部の前後方向中途部を、底壁3Cから離れる方向(上方向)に略V字状又は略U字状に屈曲して形成したものであり、側壁3Aと固着されているが底壁3Cとは固着されていない。
後補強部材8Rの底壁固着部8arの逃げ部9も、下連結体4の端部縁から底壁3Cを介して加わる局部的過大な応力を、逃げ部9の前後部位等の周囲部位に拡散して伝えることができる。
The escape portion 9 is formed by bending a midway portion in the front-rear direction of the lower portion of the plate material bent in an L shape into a substantially V shape or a substantially U shape in a direction away from the bottom wall 3C (upward direction). Yes, it is fixed to the side wall 3A but not to the bottom wall 3C.
Also in the relief portion 9 of the bottom wall fixing portion 8ar of the rear reinforcing member 8R, local excessive stress applied from the end edge of the lower connecting body 4 via the bottom wall 3C is applied to surrounding portions such as the front and rear portions of the relief portion 9. Can spread and communicate.
前記前後補強部材8F、8Rは左右両端が左右側壁3Aと固着された幅広の板材で形成されているが、帯板、棒材又はパイプで形成して、下連結体4の左右板に対応させて左右一対設け、左部材を左側壁3Aと底壁3Cとに固着し、右部材を右側壁3Aと底壁3Cとに固着してもよい。
また、前後補強部材8F、8Rの上部をL字状に屈曲し、天壁3Bの下面、特に上連結体6の前後方向の端部に重合する位置に固着してもよい。この場合は、底壁3C又は左右側壁3Aに、補強部材8の上端まで溶接トーチを挿入できる穴を形成しておく必要がある。
The front and rear reinforcing members 8F and 8R are formed of a wide plate material whose left and right ends are fixed to the left and right side walls 3A. However, the front and rear reinforcing members 8F and 8R are formed of a band plate, a bar or a pipe and correspond to the left and right plates of the lower connector 4. The left member may be fixed to the left side wall 3A and the bottom wall 3C, and the right member may be fixed to the right side wall 3A and the bottom wall 3C.
Further, the upper portions of the front and rear reinforcing members 8F and 8R may be bent in an L shape, and fixed to the lower surface of the top wall 3B, in particular, the position overlapping the front and rear end portions of the upper connector 6. In this case, it is necessary to form a hole through which the welding torch can be inserted up to the upper end of the reinforcing member 8 in the bottom wall 3C or the left and right side walls 3A.
図6において、前記ブーム3の補強部材8の変形例を示しており、前後補強部材8F、8Rはほとんど底壁固着部8af、8arのみからなり、ブーム3内を仕切る仕切板11と別体に形成され、前後方向中央に逃げ部9を有する側面視Ω形状になっている。
底壁固着部8af、8arは、左右両端、特に逃げ部9の左右両端が左右側壁3Aに固着され、逃げ部9の前後の底壁固着部8aが底壁3Cの上面に固着されている。この変形
例の前後補強部材8F、8Rは、底壁固着部8af、8arの前後方向の端部を仕切板11の下端と固着してもよい。
FIG. 6 shows a modification of the reinforcing member 8 of the boom 3. The front and rear reinforcing members 8F and 8R are substantially composed only of bottom wall fixing portions 8af and 8ar, and are separated from the partition plate 11 that partitions the inside of the boom 3. It is formed and has a Ω shape in a side view having a relief portion 9 at the center in the front-rear direction.
The bottom wall fixing portions 8af and 8ar are fixed to the left and right side walls 3A at both left and right ends, particularly the left and right ends of the escape portion 9, and the bottom wall fixing portions 8a before and after the escape portion 9 are fixed to the upper surface of the bottom wall 3C. In the front and rear reinforcing members 8F and 8R of this modification, the front and rear end portions of the bottom wall fixing portions 8af and 8ar may be fixed to the lower end of the partition plate 11.
図1〜5、12において、ブーム3の先端に枢支されたアーム28には、基部の上部に鶏冠形状の左右一対の板材でシリンダ連結体33が設けられており、このシリンダ連結体33の後部はブーム3の先端とオーバラップしていて、回動シリンダ7のシリンダロッド先端がピン34を介して連結されており、前部には作業具シリンダ29のシリンダボトム側がピン35を介して連結されている。   In FIGS. 1 to 5 and 12, the arm 28 pivotally supported at the tip of the boom 3 is provided with a cylinder coupling body 33 with a pair of left and right chicken-plates on the upper part of the base portion. The rear part overlaps the tip of the boom 3, the cylinder rod tip of the rotating cylinder 7 is connected via a pin 34, and the cylinder bottom side of the work tool cylinder 29 is connected via a pin 35 to the front part. Has been.
作業具シリンダ29のシリンダロッド先端は、押動リンク36を介して作業具Sに連結され、制御リンク37を介してアーム28と連結されている。
アーム28の側面には、ブレーカ等のアタッチメントを作動させるための作動油供給用のサービスポート部材40が装着されている。このサービスポート部材40は移動機体Tに設けられたコントロールバルブ(図示せず)と油圧配管41で接続されており、油圧配管41はブーム3の上面に配置した金属配管41Aと、この金属配管41Aとコントロールバルブとを接続する第1ホース41Bと、サービスポート部材40からアーム28の上面に至るポート配管41Cと、このポート配管41Cと金属配管41Aとを接続する第2ホース41Dとを有している。
The tip of the cylinder rod of the work tool cylinder 29 is connected to the work tool S via the push link 36 and is connected to the arm 28 via the control link 37.
A service port member 40 for supplying hydraulic oil for operating an attachment such as a breaker is mounted on the side surface of the arm 28. The service port member 40 is connected to a control valve (not shown) provided in the mobile machine body T by a hydraulic pipe 41. The hydraulic pipe 41 includes a metal pipe 41A disposed on the upper surface of the boom 3, and the metal pipe 41A. A first hose 41B for connecting the control pipe and the control pipe, a port pipe 41C from the service port member 40 to the upper surface of the arm 28, and a second hose 41D for connecting the port pipe 41C and the metal pipe 41A. Yes.
前記サービスポート部材40はアーム28の側面に取付座42を介して固定され、ポート配管41Cはアーム28の上面に取付座43を介して固定されており、第2ホース41Dはアーム28のシリンダ連結体33内に挿通されている。
前記シリンダ連結体33内には、回動シリンダ7連結用のピン34を受けるピン受け部44から支軸30に向かって補強ガイド12が設けられ、シリンダ連結体33を構成する左右板を連結して補強している。
The service port member 40 is fixed to the side surface of the arm 28 via a mounting seat 42, the port pipe 41C is fixed to the upper surface of the arm 28 via a mounting seat 43, and the second hose 41D is connected to the cylinder of the arm 28. It is inserted into the body 33.
A reinforcing guide 12 is provided in the cylinder coupling body 33 from the pin receiving portion 44 for receiving the pin 34 for coupling the rotating cylinder 7 toward the support shaft 30 to connect the left and right plates constituting the cylinder coupling body 33. Are reinforced.
この補強ガイド12は先端に側面視への字状に屈曲された案内部12aが形成され、この案内部12aの先端縁には案内凹部12bが形成され、支軸30側が前記第2ホース41D及び作業具シリンダ29接続用のホース46aを案内している。
前記補強ガイド12を有するシリンダ連結体33は、内部に挿通された第2ホース41D及びホース46aの左右振れ及び上下振れを規制して、破損しないように保護している。
The reinforcing guide 12 is formed with a guide portion 12a bent in a side-view shape at the tip, a guide recess 12b is formed at the tip edge of the guide portion 12a, and the support shaft 30 side is connected to the second hose 41D and A hose 46a for connecting the work tool cylinder 29 is guided.
The cylinder coupling body 33 having the reinforcing guide 12 protects the second hose 41D and the hose 46a inserted through the cylinder hose 46D from sideways and upside down so as not to be damaged.
図1〜5、7において、前記ブーム3には、サービスポート用金属配管41A以外に、コントロールバルブとホースを介して接続された2組の配管45、46が取付けられている。
ブーム基部側に配置された第1配管45は、ホース45aを介して回動シリンダ7と、ホース45bを介してコントロールバルブとそれぞれ接続され、ブーム基部側から先端側まで延設された第2配管46は、ホース46aを介して作業具シリンダ29と、ホース46bを介してコントロールバルブとそれぞれ接続され、2組4本の配管45、46は、上下のクランプ具(配管装着具)48を介して並列してブーム3の上面に固定されている。
1 to 5 and 7, in addition to the service port metal pipe 41A, the boom 3 is attached with two sets of pipes 45 and 46 connected via a control valve and a hose.
The first piping 45 arranged on the boom base side is connected to the rotating cylinder 7 via the hose 45a and the control valve via the hose 45b, and extends from the boom base side to the tip side. 46 is connected to a work tool cylinder 29 via a hose 46 a and a control valve via a hose 46 b, and two sets of four pipes 45, 46 are connected via upper and lower clamp tools (pipe fittings) 48. It is fixed to the upper surface of the boom 3 in parallel.
下側のクランプ具48は、4本の配管に渡る長さの管押さえ板48Aと、ブーム3に固定のポスト部材48Bと、管押さえ板48Aをポスト部材48Bに取付けるボルト48Cと、クランプ下側部材48Dとを有しており、管押さえ板48Aは2本1組の第1配管45を押さえると同時に2本1組の第2配管46をも押さえている。クランプ下側部材48Dは配管を適度に押さえることのできる高さのものに変更できる。   The lower clamp tool 48 includes a pipe holding plate 48A having a length extending over four pipes, a post member 48B fixed to the boom 3, a bolt 48C for attaching the pipe holding plate 48A to the post member 48B, and a clamp lower side. 48D, the pipe holding plate 48A holds down the two sets of the first pipes 45 and simultaneously holds up the two sets of the second pipes 46. The lower clamp member 48D can be changed to a height that can moderately hold the pipe.
前記クランプ具48によって押さえ付けるのは、金属配管、ホース又はそれらの組合せであってもよく、第1配管45及び第2配管46は金属配管であり、第2配管46には管押さえ板48Aに押さえられる箇所にラバークッション材49を巻き付けている。
図4,5において、上側に配置されたクランプ具48は金属配管の第1配管45とホース45aの第2配管46を押さえ付けている。
The clamp member 48 may be pressed by a metal pipe, a hose, or a combination thereof. The first pipe 45 and the second pipe 46 are metal pipes, and the second pipe 46 has a pipe holding plate 48A. A rubber cushion material 49 is wound around the place to be pressed.
4 and 5, the clamp tool 48 arranged on the upper side presses the first pipe 45 of the metal pipe and the second pipe 46 of the hose 45a.
クランプ具48は管押さえ板48Aで1組の第1配管45を押さえるものに比して、延長して第2配管46も押さえることにより、第2配管46用のポスト部材48B、ボルト48C等の部品を減少でき、取付け作業の容易化もできる。
図8、9において、第2例のクランプ具(配管装着具)51を示しており、クランプ具
51は、管押さえ板51Aと、ポスト部材51Bと、ボルト51Cと、クランプ下側部材51Dとを有している。
The clamp tool 48 extends and presses the second pipe 46 as compared with a pipe holding plate 48A that holds a pair of the first pipes 45, so that a post member 48B for the second pipe 46, a bolt 48C, etc. The number of parts can be reduced, and the installation work can be facilitated.
8 and 9, a clamp device (pipe fitting device) 51 of the second example is shown. The clamp device 51 includes a tube pressing plate 51A, a post member 51B, a bolt 51C, and a clamp lower member 51D. Have.
クランプ具51は、4本の配管に渡る長さの管押さえ板51Aの右半分が2本1組の金属製の第1配管45に固着されており、管押さえ板51Aの左半分が金属製又はホース製の2本1組の第2配管46を押さえており、2本の第1配管45間及び2本の第2配管46間にポスト部材51Bを配置している。
前記クランプ具51は2本の金属製の第1配管45を固着しているので、第1配管45にホースを接続するときに配管の廻り止め作用もでき、ホースの接続作業が容易になる。左半分の第2配管46用のポスト部材51Bとボルト51Cとを割愛してもよい。
In the clamp 51, the right half of a pipe holding plate 51A having a length extending over four pipes is fixed to a pair of metal first pipes 45, and the left half of the pipe holding plate 51A is made of metal. Alternatively, two sets of second pipes 46 made of hoses are pressed, and post members 51 </ b> B are arranged between the two first pipes 45 and between the two second pipes 46.
Since the clamp tool 51 has two metal first pipes 45 fixed thereto, when the hose is connected to the first pipe 45, it can also prevent the pipe from rotating, and the connecting work of the hose becomes easy. The post member 51B and the bolt 51C for the second pipe 46 in the left half may be omitted.
図10において、第3例のクランプ具(配管装着具)52を示しており、クランプ具52は、2本の金属配管45を管押さえ板52Aを固着しており、ボルト52Cでブーム3に固定するように構成されており、2本の金属配管45の廻り止めと取付け容易化を図ることができる。
図11において、第4例のクランプ具(配管装着具)53を示しており、クランプ具53は、2本の金属配管45を長手方向に間隔をおいて2箇所で連結しており、一方又は両方がボルト又は留め具を介してブーム3に取付けられており、2本の金属配管45の廻り止めと取付け容易化を図ることができる。
FIG. 10 shows a clamp tool (pipe fitting tool) 52 of the third example. The clamp tool 52 has two metal pipes 45 fixed to a pipe holding plate 52A and fixed to the boom 3 with bolts 52C. Thus, the two metal pipes 45 can be prevented from being rotated and attached easily.
FIG. 11 shows a clamp tool (pipe fitting tool) 53 of the fourth example, and the clamp tool 53 connects two metal pipes 45 at two positions at intervals in the longitudinal direction. Both are attached to the boom 3 via bolts or fasteners, and the two metal pipes 45 can be prevented from rotating and easily attached.
なお、本発明は前記実施形態における各部材の形状及びそれぞれの前後・左右・上下の位置関係は、図1〜7示すように構成することが最良である。しかし、前記実施形態に限定されるものではなく、部材、構成を種々変形したり、組み合わせを変更したりすることもできる。
例えば、作業機の作業装置としては、バックホー以外に、トラクタに装着されたフロントローダ、ホイールローダのローダ、パワーショベルの掘削装置等でもよく、それらのブームに補強部材8を適用することができる。
In the present invention, the shape of each member and the positional relationship between the front, back, left, and right in the above embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the working device of the work machine may be a front loader mounted on a tractor, a loader of a wheel loader, an excavator of a power shovel, or the like, in addition to the backhoe, and the reinforcing member 8 can be applied to these booms.
1 作業装置
2 横軸
3 ブーム
3A 側壁
3B 天壁
3C 底壁
3D 基部連結体
3E 先端連結体
4 下連結体
5 昇降シリンダ
6 上連結体
7 回動シリンダ
8 補強部材
8F 前補強部材
8R 後補強部材
8a 底壁固着部
8af 前底壁固着部
8ar 後底壁固着部
28 アーム
29 作業具シリンダ
30 支軸
S 作業具
T 移動機体
DESCRIPTION OF SYMBOLS 1 Work apparatus 2 Horizontal axis 3 Boom 3A Side wall 3B Top wall 3C Bottom wall 3D Base connection body 3E Tip connection body 4 Lower connection body 5 Lifting cylinder 6 Upper connection body 7 Turning cylinder 8 Reinforcement member 8F Front reinforcement member 8R Rear reinforcement member 8a Bottom wall fixing portion 8af Front bottom wall fixing portion 8ar Rear bottom wall fixing portion 28 Arm 29 Work tool cylinder 30 Support shaft S Work tool T Mobile body

Claims (3)

  1. 移動機体(T)に横軸(2)を介して昇降自在に側面視くの字状のブーム(3)の基部を支持し、ブーム(3)の中途屈曲部下面側に設けた下連結体(4)にブーム昇降用の昇降シリンダ(5)の先端を連結しており、
    前記ブーム(3)を左右側壁(3A)、天壁(3B)及び底壁(3C)を有して筒形状に形成し、このブーム(3)の内部に側壁(3A)と底壁(3C)とに固着された補強部材(8)を設け、この補強部材(8)の底壁固着部(8a)を底壁(3C)に固着された下連結体(4)の前後方向の端部と重合配置しており、
    前記補強部材(8)の底壁固着部(8a)の重合部分の中途部に、下連結体(4)の端部縁に対向していて底壁(3C)から離隔した逃げ部(9)を形成していることを特徴とする作業機の作業装置。
    Lower connecting body provided on the lower side of the middle bent portion of the boom (3) by supporting the base of the U-shaped boom (3) as viewed from the side through the horizontal axis (2) on the mobile body (T). (4) is connected to the tip of the lifting cylinder (5) for lifting the boom,
    The boom (3) has a left and right side wall (3A), a top wall (3B) and a bottom wall (3C) and is formed into a cylindrical shape. Inside the boom (3), the side wall (3A) and the bottom wall (3C) are formed. And a reinforcing member (8) fixed to the bottom wall (3C) of the bottom wall (3C) of the reinforcing member (8). And polymerization arrangement,
    In the middle of the overlapping portion of the bottom wall fixing portion (8a) of the reinforcing member (8), a relief portion (9) facing the end edge of the lower connector (4) and spaced from the bottom wall (3C). The working device of the working machine characterized by forming.
  2. 前記補強部材(8)をブーム(3)の内部に前後2部材配置し、前補強部材(8F)の底壁固着部(8af)を下連結体(4)の前端部と重合配置し、後補強部材(8R)の底壁固着部(8ar)を下連結体(4)の後端部と重合配置していることを特徴とする請求項1に記載の作業機の作業装置。   The reinforcing member (8) is arranged in two parts in the front and rear in the boom (3), the bottom wall fixing portion (8af) of the front reinforcing member (8F) is overlapped with the front end portion of the lower connector (4), and the rear The working device of the working machine according to claim 1, wherein the bottom wall fixing portion (8ar) of the reinforcing member (8R) is arranged to overlap the rear end portion of the lower connecting body (4).
  3. 前記補強部材(8)の底壁固着部(8a)は、前後方向中途部を底壁(3C)から離れる方向に屈曲して逃げ部(9)を形成していることを特徴とする請求項1又は2に記載の作業機の作業装置。   The bottom wall adhering portion (8a) of the reinforcing member (8) is characterized in that an intermediate portion in the front-rear direction is bent in a direction away from the bottom wall (3C) to form a relief portion (9). The working device of the working machine as described in 1 or 2.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017066790A (en) * 2015-09-30 2017-04-06 株式会社クボタ Work machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0530240U (en) * 1991-05-29 1993-04-20 新キヤタピラー三菱株式会社 Power shovel hydraulic pipe mounting structure
JPH1018838A (en) * 1996-07-01 1998-01-20 Calsonic Corp Pipe joint
JPH11269908A (en) * 1998-03-24 1999-10-05 Kubota Corp Boom of working machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0530240U (en) * 1991-05-29 1993-04-20 新キヤタピラー三菱株式会社 Power shovel hydraulic pipe mounting structure
JPH1018838A (en) * 1996-07-01 1998-01-20 Calsonic Corp Pipe joint
JPH11269908A (en) * 1998-03-24 1999-10-05 Kubota Corp Boom of working machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017066790A (en) * 2015-09-30 2017-04-06 株式会社クボタ Work machine

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