JP2004143766A - Counterweight for service car - Google Patents

Counterweight for service car Download PDF

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Publication number
JP2004143766A
JP2004143766A JP2002308665A JP2002308665A JP2004143766A JP 2004143766 A JP2004143766 A JP 2004143766A JP 2002308665 A JP2002308665 A JP 2002308665A JP 2002308665 A JP2002308665 A JP 2002308665A JP 2004143766 A JP2004143766 A JP 2004143766A
Authority
JP
Japan
Prior art keywords
counterweight
cover
inspection hole
inspection
work vehicle
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.)
Pending
Application number
JP2002308665A
Other languages
Japanese (ja)
Inventor
Toshibumi Ogiwara
荻原 俊文
Yukio Shimizu
清水 幸夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Zenoah Co
Komatsu Ltd
Original Assignee
Komatsu Zenoah Co
Komatsu Ltd
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 Komatsu Zenoah Co, Komatsu Ltd filed Critical Komatsu Zenoah Co
Priority to JP2002308665A priority Critical patent/JP2004143766A/en
Publication of JP2004143766A publication Critical patent/JP2004143766A/en
Pending legal-status Critical Current

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  • Component Parts Of Construction Machinery (AREA)
  • Superstructure Of Vehicle (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a counterweight for a service car improving a safety in the case of an operation and facilitating the maintenance/inspection of an engine without damaging an appearance. <P>SOLUTION: In the counterweight for the service car, in which an external surface is molded in an approximately arcuate shape while a central section is extended upwards and which is made of a casting, the counterweight has an inspection hole formed at the central section of the counterweight, a cover covering the inspection hole and a hinge mechanism pivotally supporting the cover rotatably. An additional weight section is formed on the cover, and the cover is used as an auxiliary counterweight for the counterweight. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、作業車両のカウンタウェイトに関する。
【0002】
【従来の技術】
従来のカウンタウェイト100を有する作業車両である油圧ショベル90の一例を示す側面図を図6に示す。作業装置50は車体の前端部に装着され、カウンタウェイト100は前記作業装置50にかかる力とバランスをとるため、油圧ショベル90の車体の後端部に配設されている。そして、該カウンタウェイト100は上方側に延設され、上端にキャノピ111を支持するサポート部材112が設けられ、キャノピ111を支持するように構成されている(例えば、特許文献1参照。)。
【0003】
【特許文献1】
特開平10−140607号公報(第2−5頁、第1−6図)
【発明が解決しようとする課題】
【0004】
しかしながら、図6に示すような従来のカウンタウェイト100は上方側に延設しているので、カウンタウェイト100の重心を後端側に寄せることができ、その結果、作業時の作業車両の安定性が改善されるものの、カウンタウェイト100の後部は開放されていないので、作業車両の後部の側面に、エンジン300の整備・点検を行うための開放可能なボンネットなどを設けているが、それでもなお、整備・点検のためのスペースが十分にとれず、整備・点検に困難をきたすことが多い。
【0005】
本発明は、上記の問題点に着目してなされたものであり、作業時の安定性を向上し、かつ外観を損なうことなく、エンジンの整備・点検を容易化した作業車両のカウンタウェイトを提供することを目的としている。
【0006】
【課題を解決するための手段、作用及び効果】
上記の目的を達成するために、本発明に係わる第1の発明は、外面を略円弧状に成形するとともに、中央部を上方に延長した鋳造製の作業車両のカウンタウェイトにおいて、前記カウンタウェイトの中央部に設けた点検穴と、前記点検穴を覆うカバーと、前記カバーを回動自在に軸支するヒンジ機構とを備えたことを特徴とする。
【0007】
第1の発明によると、外面を略円弧状に成形するとともに、中央部を上方に延長した鋳造製の作業車両のカウンタウェイトであるので、カウンタウェイトの重心を後端側に寄せることができ、作業時の安定性が改善されるとともに、前記カウンタウェイトの中央部に点検穴を設けたので、前記点検穴からエンジンに接近することができ、フィルタ類の交換やオイル点検などの作業が容易に行える。また、前記点検穴を覆うカバーと、前記カバーを回動自在に軸支するヒンジ機構とを備えたので、カバーの開閉が容易で、かつカバーにより点検穴を覆うので点検孔及びエンジンルーム内部が、外部から見えなくなるので外観を損なうことがない。
【0008】
第2の発明は、前記カバーは、前記カバーに重量増加部を形成し、前記カバーを前記カウンタウェイトの補助カウンタウェイトとしたことを特徴とする。
【0009】
第2の発明によると、前記カバーは、前記カバーに重量増加部を形成し、前記カバーを前記カウンタウェイトの補助カウンタウェイトとしたので、作業装置を装着した旋回体を有する作業車両においては、旋回体の旋回半径を増加させることなく、作業時の安定性を一層向上することができる。
【0010】
【発明の実施の形態】
図1〜図5により、本発明に係わる実施の形態を説明する。図1は本発明に係わる作業車両の一例である小型の油圧ショベル90Aを示す側面図である。油圧ショベル90Aは、下部走行体91に旋回自在な上部旋回体92を備えている。上部旋回体92にはキャノピ93を備えている。そして車体前端である上部旋回体92の前端に、作業装置5を備えている。
【0011】
作業装置5は基端部を上部旋回体92に取り付けられ、上下方向に回動自在なブーム51と、ブーム51の先端に装着され上下方向に回動自在なアーム52と、アーム52の先端に装着され上下方向に回動自在なバケット53を備えている。ブーム51はブームシリンダ54により、アーム52はアームシリンダ55により、バケット53はバケットシリンダ56によりそれぞれ作動される。
【0012】
油圧ショベル90Aの上部旋回体92には、該作業装置5に加わる力に対してバランスをとるカウンタウェイト1を車体後端である上部旋回体92の後端に配設している。図2は本作業車両の後面図である。カウンタウェイト1の下部後面1Rは左右の端部が前方に湾曲した略円弧状の形状である。鋳造によって外面を略円弧状に成形したカウンタウェイト1の左右方向の中央部は下部1bから上方に延長され、延長部1aを形成している。
【0013】
カウンタウェイト1と、カバー2について図3の斜視図を用いて説明すると、まず、カウンタウェイト1の延長部1aの中央部には点検穴11を形成する。そして、点検穴11を覆うカバー2を設け、カバー2をヒンジ21によってカウンタウェイト1に回動自在に軸支すると同時に、カバー2を閉じた状態でカバー2をロックするキャッチ機構であるフック22aおよびフック棒22bを設けて、カバー2を係止する係止機構としている。
【0014】
フック22aはカバー2に設けられ図示しないレバーにより作動させ、カウンタウェイト1の点検穴11の付近の延長部1a側面に設けられたフック棒22bに係合してカバー2を係止する。これによって、カウンタウェイト1の前方に配設されているエンジン(図示せず)の整備・点検は、図示しないレバーによりフック22aを作動させ、フック棒22bからフック22aを外してカバー2を開くことにより、点検穴11から容易に行うことができる。
【0015】
作業車両の作業時には、カバー2を閉じて点検穴11を覆い、キャッチ機構であるフック22aおよびフック棒22bによってカバーを固定できるので、点検穴11を設けても、カバー2により点検穴11を覆うので点検孔11及びエンジンルーム内部が、外部から見えなくなるので、作業車両の後部の外観を損なうことがない。
【0016】
また、カウンタウェイト1の重量を増加するために、図4に示す実施例のように、下部補助カウンタウェイト4を矢印のように下部補助カウンタウェイト4の裏面をカウンタウェイト1の下部1bの表面に合わせて、カウンタウェイト1の下部1bのウェイトフック溝1Fに下部補助カウンタウェイト4のウェイトフック4Fを引掛けて装着し、ボルト41によって固定しても良い。これにより、カウンタウェイト1を重量の大きい別のカウンタウェイトに交換する必要が無く、簡単にカウンタウェイト1の重量を増加することができる。
【0017】
また、図5に示す実施例では、カバー3は鋳造により肉厚を増加し、重量増加部3aを形成しているので、カバー3の重量を大幅に増加することができる。従って、カバー3は補助カウンタウェイトとしての機能を備えることができるので、作業車両は作業時の安定性が一層向上し、作業性能を向上することができる。また、図4に示すように、下部補助カウンタウェイト4をカウンタウェイト1に装着して、作業装置を旋回体に装着した小型油圧ショベルのような作業車両に適用した場合には、下部補助カウンタウェイト4の厚さにより、旋回体の最外側の旋回半径が増加する。しかし、一般的にこのような作業車両は、狭所作業性能を良好に保つため、旋回体の最外側の旋回半径を増加させることなく、作業時の安定性を向上することが望ましく、図5の構成によれば、補助カウンタウェイトとしてのカバー3が、カウンタウェイト1より外側にでることなく構成できるので、作業車両の狭所作業性能と作業時の安定性を両立させることが可能である。
【図面の簡単な説明】
【図1】本発明に係わる作業車両の一例を示す側面図である。
【図2】本発明に係わる作業車両の一例を示す後面図である。
【図3】カウンタウェイトとカバーの構成を示す斜視図である。
【図4】カウンタウェイトと下部補助カウンタウェイトの構成を示す分解斜視図である。
【図5】カウンタウェイトとカバーの構成を示す斜視図である。
【図6】カウンタウェイトを有する従来の作業車両の一例を示す。
【符号の説明】
1…カウンタウェイト、2,3…カバー、3a…重量増加部、4…下部補助カウンタウェイト、11…点検穴、21…ヒンジ。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a work vehicle counterweight.
[0002]
[Prior art]
FIG. 6 is a side view showing an example of a hydraulic excavator 90 which is a working vehicle having a conventional counterweight 100. As shown in FIG. The work device 50 is mounted on the front end of the vehicle body, and the counterweight 100 is disposed at the rear end of the vehicle body of the hydraulic excavator 90 to balance the force applied to the work device 50. The counterweight 100 extends upward, and a support member 112 that supports the canopy 111 is provided at the upper end, and is configured to support the canopy 111 (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-10-140607 (pages 2-5, FIG. 1-6)
[Problems to be solved by the invention]
[0004]
However, since the conventional counterweight 100 as shown in FIG. 6 is extended upward, the center of gravity of the counterweight 100 can be moved toward the rear end side, and as a result, the stability of the work vehicle during work However, since the rear portion of the counterweight 100 is not opened, an openable hood or the like for performing maintenance and inspection of the engine 300 is provided on the side surface of the rear portion of the work vehicle. Insufficient space for maintenance and inspection often makes maintenance and inspection difficult.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a counterweight for a working vehicle that has improved stability during work and facilitates maintenance and inspection of an engine without deteriorating the appearance. It is intended to be.
[0006]
Means for Solving the Problems, Functions and Effects
In order to achieve the above object, a first invention according to the present invention relates to a counterweight of a cast working vehicle having an outer surface formed in a substantially arc shape and a central portion extending upward, An inspection hole provided at a central portion, a cover for covering the inspection hole, and a hinge mechanism for rotatably supporting the cover are provided.
[0007]
According to the first aspect of the invention, since the outer surface is formed into a substantially circular arc shape and the center portion of the counterweight of the working vehicle made of casting is extended upward, the center of gravity of the counterweight can be shifted to the rear end side, Stability during operation is improved, and an inspection hole is provided in the center of the counterweight, so that the engine can be accessed from the inspection hole, and operations such as filter replacement and oil inspection can be easily performed. I can do it. Further, since the cover for covering the inspection hole and the hinge mechanism for rotatably supporting the cover are provided, the cover can be easily opened and closed, and the inspection hole is covered by the cover, so that the inspection hole and the inside of the engine compartment are formed. Since it is invisible from the outside, the appearance is not impaired.
[0008]
A second invention is characterized in that the cover has a weight increasing portion formed on the cover, and the cover is an auxiliary counterweight of the counterweight.
[0009]
According to the second invention, since the cover forms a weight increasing portion on the cover and the cover serves as an auxiliary counterweight of the counterweight, the work vehicle having the revolving body to which the working device is mounted can be turned. Stability during work can be further improved without increasing the turning radius of the body.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a small excavator 90A as an example of a work vehicle according to the present invention. The hydraulic excavator 90 </ b> A includes an upper revolving unit 92 that is rotatable about a lower traveling unit 91. The upper swing body 92 has a canopy 93. The working device 5 is provided at the front end of the upper swing body 92 which is the front end of the vehicle body.
[0011]
The working device 5 has a base end attached to the upper revolving structure 92, and a boom 51 that is vertically rotatable, an arm 52 that is attached to the tip of the boom 51 and that is vertically rotatable, and a A bucket 53 is provided and is rotatable vertically. The boom 51 is operated by a boom cylinder 54, the arm 52 is operated by an arm cylinder 55, and the bucket 53 is operated by a bucket cylinder 56.
[0012]
The counterweight 1 for balancing the force applied to the working device 5 is disposed at the rear end of the upper revolving structure 92 that is the rear end of the vehicle body. FIG. 2 is a rear view of the work vehicle. The lower rear surface 1R of the counterweight 1 has a substantially arc shape in which left and right ends are curved forward. The central portion in the left-right direction of the counterweight 1 whose outer surface is formed into a substantially arc shape by casting is extended upward from the lower portion 1b to form an extended portion 1a.
[0013]
The counterweight 1 and the cover 2 will be described with reference to the perspective view of FIG. 3. First, an inspection hole 11 is formed at the center of the extension 1 a of the counterweight 1. A cover 2 that covers the inspection hole 11 is provided, and the cover 2 is rotatably supported on the counterweight 1 by a hinge 21, and at the same time, a hook 22 a as a catch mechanism that locks the cover 2 with the cover 2 closed is provided. A hook bar 22b is provided to form a locking mechanism for locking the cover 2.
[0014]
The hook 22a is provided on the cover 2 and is operated by a lever (not shown). The hook 22a engages with a hook bar 22b provided on the side surface of the extension 1a near the inspection hole 11 of the counterweight 1 to lock the cover 2. As a result, maintenance and inspection of an engine (not shown) disposed in front of the counterweight 1 is performed by operating the hook 22a by a lever (not shown), removing the hook 22a from the hook rod 22b, and opening the cover 2. Thus, the inspection can be easily performed from the inspection hole 11.
[0015]
When the work vehicle is working, the cover 2 is closed to cover the inspection hole 11, and the cover can be fixed by the hook 22a and the hook bar 22b, which are catch mechanisms. Therefore, even if the inspection hole 11 is provided, the inspection hole 11 is covered by the cover 2. Therefore, the inspection hole 11 and the inside of the engine room cannot be seen from the outside, so that the appearance of the rear portion of the working vehicle is not spoiled.
[0016]
In order to increase the weight of the counterweight 1, as shown in the embodiment shown in FIG. 4, the lower auxiliary counterweight 4 is attached to the back surface of the lower auxiliary counterweight 4 as shown by the arrow on the front surface of the lower portion 1b of the counterweight 1. In addition, the weight hook 4F of the lower auxiliary counterweight 4 may be hooked and mounted on the weight hook groove 1F of the lower portion 1b of the counterweight 1 and fixed with the bolt 41. As a result, there is no need to replace the counterweight 1 with another counterweight having a larger weight, and the weight of the counterweight 1 can be easily increased.
[0017]
In the embodiment shown in FIG. 5, the thickness of the cover 3 is increased by casting and the weight increasing portion 3a is formed, so that the weight of the cover 3 can be greatly increased. Therefore, since the cover 3 can have a function as an auxiliary counterweight, the work vehicle can further improve the stability during work and can improve work performance. As shown in FIG. 4, when the lower auxiliary counterweight 4 is mounted on the counterweight 1 and the working device is applied to a work vehicle such as a small hydraulic shovel mounted on a swing body, the lower auxiliary counterweight 4 Due to the thickness of 4, the outermost turning radius of the turning body increases. However, in general, it is desirable for such a work vehicle to improve the stability at the time of work without increasing the outermost turning radius of the revolving structure in order to maintain good work performance in a narrow place. According to the configuration described above, the cover 3 as the auxiliary counterweight can be configured without protruding outside the counterweight 1, so that it is possible to achieve both work performance in a narrow place of the work vehicle and stability during work.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a work vehicle according to the present invention.
FIG. 2 is a rear view showing an example of a work vehicle according to the present invention.
FIG. 3 is a perspective view showing a configuration of a counterweight and a cover.
FIG. 4 is an exploded perspective view showing a configuration of a counter weight and a lower auxiliary counter weight.
FIG. 5 is a perspective view showing a configuration of a counterweight and a cover.
FIG. 6 shows an example of a conventional work vehicle having a counterweight.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Counter weight, 2,3 ... Cover, 3a ... Weight increasing part, 4 ... Lower auxiliary counterweight, 11 ... Inspection hole, 21 ... Hinge.

Claims (2)

外面を略円弧状に成形するとともに、中央部を上方に延長した鋳造製の作業車両のカウンタウェイトにおいて、前記カウンタウェイトの中央部に設けた点検穴と、前記点検穴を覆うカバーと、前記カバーを回動自在に軸支するヒンジ機構とを備えたことを特徴とする作業車両のカウンタウェイト。In a counterweight of a cast working vehicle having an outer surface formed in a substantially arc shape and a central portion extending upward, an inspection hole provided in a central portion of the counterweight, a cover covering the inspection hole, and the cover And a hinge mechanism rotatably supporting the counterweight of the work vehicle. 前記カバーは、前記カバーに重量増加部を形成し、前記カバーを前記カウンタウェイトの補助カウンタウェイトとしたことを特徴とする請求項1記載の作業車両のカウンタウェイト。The counterweight of a work vehicle according to claim 1, wherein the cover has a weight increasing portion formed on the cover, and the cover serves as an auxiliary counterweight of the counterweight.
JP2002308665A 2002-10-23 2002-10-23 Counterweight for service car Pending JP2004143766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002308665A JP2004143766A (en) 2002-10-23 2002-10-23 Counterweight for service car

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Application Number Priority Date Filing Date Title
JP2002308665A JP2004143766A (en) 2002-10-23 2002-10-23 Counterweight for service car

Publications (1)

Publication Number Publication Date
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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007063870A (en) * 2005-08-31 2007-03-15 Hitachi Constr Mach Co Ltd Construction machine
JP2008025167A (en) * 2006-07-20 2008-02-07 Kobelco Contstruction Machinery Ltd Construction machinery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007063870A (en) * 2005-08-31 2007-03-15 Hitachi Constr Mach Co Ltd Construction machine
JP4611846B2 (en) * 2005-08-31 2011-01-12 日立建機株式会社 Construction machine manufacturing method
JP2008025167A (en) * 2006-07-20 2008-02-07 Kobelco Contstruction Machinery Ltd Construction machinery

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