JP2875748B2 - Backhoe - Google Patents
BackhoeInfo
- Publication number
- JP2875748B2 JP2875748B2 JP26794094A JP26794094A JP2875748B2 JP 2875748 B2 JP2875748 B2 JP 2875748B2 JP 26794094 A JP26794094 A JP 26794094A JP 26794094 A JP26794094 A JP 26794094A JP 2875748 B2 JP2875748 B2 JP 2875748B2
- Authority
- JP
- Japan
- Prior art keywords
- dozer
- hydraulic cylinder
- auxiliary
- driving
- traveling device
- 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 - Lifetime
Links
Landscapes
- Component Parts Of Construction Machinery (AREA)
- Operation Control Of Excavators (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、左右一対の走行装置を
機台に左右間隔調節可能に設け、主ドーザと、この主ド
ーザの左右両端部にそれぞれ左右幅方向に出退自在に設
けた補助ドーザとから成るドーザを前記機台に設けて、
前記主ドーザからの前記補助ドーザの出退によって、前
記ドーザを前記一対の走行装置の左右幅とほぼ同幅に拡
縮調節可能に構成してあるバックホウに関する。BACKGROUND OF THE INVENTION The present invention provides a pair of right and left traveling devices provided on a machine base so as to be adjustable in the left and right direction, and a main dozer and both left and right ends of the main dozer are provided so as to be able to move back and forth in the width direction. A dozer comprising an auxiliary dozer is provided on the machine base,
The present invention relates to a backhoe configured to be capable of adjusting the dozer to have a width substantially equal to the width of the pair of traveling devices by retracting the auxiliary dozer from the main dozer.
【０００２】[0002]
【従来の技術】従来、上記のバックホウにおいては、主
ドーザの両端部に補助ドーザを、人力により左右にスラ
イドされるように設けて、所定長さだけスライドさせた
補助ドーザを、主ドーザにピン止めするように構成して
あった。2. Description of the Related Art Conventionally, in the above-mentioned backhoe, auxiliary dozers are provided at both ends of a main dozer so as to be slidable left and right by human power, and an auxiliary dozer slid by a predetermined length is pinned on the main dozer. It was configured to stop.
【０００３】[0003]
【発明が解決しようとする課題】上記構成によれば、主
ドーザに対する補助ドーザのスライド操作やピン止め操
作を人力により行わなければならず、操作に手間がかか
り作業性の面から改善の余地があった。According to the above construction, the operation of sliding the auxiliary dozer with respect to the main dozer or the operation of pinning the main dozer must be performed manually, and the operation is troublesome, leaving room for improvement in terms of workability. there were.
【０００４】本発明は上記の実情に鑑みてなされたもの
で、その目的は、ドーザの拡縮作業の作業性を向上する
ことができるバックホウを提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a backhoe capable of improving the workability of a dozer expanding / reducing operation.
【０００５】[0005]
【課題を解決するための手段】本発明にかかるバックホ
ウの特徴構成は、左右一対の走行装置を各別に横移動さ
せる左右一対の走行装置駆動用油圧シリンダと、前記主
ドーザから前記補助ドーザを左右幅方向に各別に出退さ
せる左右一対の補助ドーザ駆動用油圧シリンダとを設け
るとともに、左右同じ側に位置する走行装置駆動用油圧
シリンダと補助ドーザ駆動用油圧シリンダとを同期して
駆動させる同期駆動手段を、左右いずれの側に対しても
設けてあることにある。The backhoe according to the present invention is characterized by a pair of left and right traveling device driving hydraulic cylinders for laterally moving a pair of left and right traveling devices, respectively, and a right and left auxiliary dozer from the main dozer. A pair of left and right auxiliary dozer driving hydraulic cylinders that respectively move in and out in the width direction are provided, and a synchronous drive that synchronously drives the traveling device driving hydraulic cylinder and the auxiliary dozer driving hydraulic cylinder located on the same left and right sides. The means is provided on either the left or right side.
【０００６】なお、左側に位置する補助ドーザ駆動用油
圧シリンダに対する作動油給排用ポートを、左側に位置
する走行装置駆動用油圧シリンダに、右側に位置する補
助ドーザ駆動用油圧シリンダに対する作動油給排用ポー
トを、右側に位置する走行装置駆動用油圧シリンダにそ
れぞれ設けて前記同期駆動手段を構成してもよい。The hydraulic oil supply / discharge port for the auxiliary dozer driving hydraulic cylinder located on the left side is connected to the traveling device driving hydraulic cylinder located on the left side and the hydraulic oil supply / discharge port for the auxiliary dozer driving hydraulic cylinder located on the right side. A discharge port may be provided in each of the traveling device driving hydraulic cylinders located on the right side to constitute the synchronous driving means.
【０００７】[0007]
【作用】上記の構成によれば、左右一対の補助ドーザ駆
動用油圧シリンダで、主ドーザから補助ドーザを左右幅
方向に各別に出退させることができ、しかも、左右同じ
側に位置する走行装置駆動用油圧シリンダと補助ドーザ
駆動用油圧シリンダとを同期駆動手段で同期して駆動さ
せることができるから、ドーザを拡縮するには、例えば
走行装置駆動用油圧シリンダを駆動操作するだけでよ
く、ドーザの拡縮作業を従来よりも簡単に行うことがで
きる。According to the above construction, a pair of left and right auxiliary dozer driving hydraulic cylinders allow the auxiliary dozer to be independently extended and retracted in the left-right width direction from the main dozer, and furthermore, the traveling device located on the same left and right side. Since the driving hydraulic cylinder and the auxiliary dozer driving hydraulic cylinder can be driven synchronously by synchronous driving means, in order to expand and contract the dozer, it is only necessary to drive the traveling device driving hydraulic cylinder, for example. Can be performed more easily than before.
【０００８】また、請求項２のように構成した場合に
は、上記の作用に加え、補助ドーザ駆動用油圧シリンダ
に対する作動油給排用油圧ホースを、例えば旋回台中心
に配備したロータリジョイントから延出することなく、
走行装置駆動用油圧シリンダの作動油給排用ポートから
延出することができて、走行装置駆動用油圧シリンダと
ロータリジョイントとの間に、補助ドーザ駆動用油圧シ
リンダの油圧ホースと走行装置駆動用油圧シリンダの油
圧ホースとのいずれもが設けられることに起因する油圧
ホースの収容構造の複雑化を回避できる。Further, in the case of the second aspect, in addition to the above operation, a hydraulic hose for supplying and discharging hydraulic oil to the hydraulic cylinder for driving the auxiliary dozer is extended from, for example, a rotary joint provided at the center of the swivel base. Without giving
It can be extended from the hydraulic oil supply / discharge port of the travel device drive hydraulic cylinder, and between the travel device drive hydraulic cylinder and the rotary joint, there is a hydraulic hose for the auxiliary dozer drive hydraulic cylinder and the travel device drive It is possible to avoid complication of the housing structure of the hydraulic hose due to the provision of both the hydraulic hose of the hydraulic cylinder.
【０００９】[0009]
【発明の効果】従って、ドーザを拡縮するには、例えば
走行装置駆動用油圧シリンダを駆動操作するだけでよ
く、ドーザの拡縮作業を従来よりも簡単に行うことがで
きるから、ドーザの拡縮作業の作業性を向上することが
できるバックホウを提供することができた。Therefore, in order to expand and contract the dozer, it is only necessary to drive, for example, a hydraulic cylinder for driving the traveling device, and the operation of expanding and contracting the dozer can be performed more easily than in the past. A backhoe that can improve workability can be provided.
【００１０】また請求項２のように構成した場合には、
請求項１と同様の作用を奏することができるうえに、油
圧ホースの収容構造の複雑化を回避できるから、上記の
効果に加え、コンパクトな構造にできるバックホウを提
供することができた。[0010] In the case of the configuration according to claim 2,
Since the same operation as that of the first aspect can be achieved, and the structure for accommodating the hydraulic hose can be prevented from becoming complicated, a backhoe having a compact structure can be provided in addition to the above-described effects.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１に、作業車の一例としてのバックホウを示し
ている。このバックホウは、左右一対のクローラ走行装
置１を支持する機台２に、旋回台３を縦軸心Ｘ周りで旋
回可能に設けるとともに、旋回台３には、操縦部４・原
動部５・横スイング可能なバックホウ装置６等を搭載装
備し、前記機台２にドーザ１１を設けて構成している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a backhoe as an example of a work vehicle. The backhoe is provided on a machine base 2 supporting a pair of right and left crawler traveling devices 1 so that a swivel base 3 can be swiveled about a vertical axis X. It is equipped with a swingable backhoe device 6 and the like, and the machine base 2 is provided with a dozer 11.
【００１２】図２に示すように、機台２には角パイプフ
レームからなる支持フレーム７を、その長手方向を左右
方向に沿わせた状態で前後に一対連結して設けている。
一方、左側のクローラ走行装置１のトラックフレーム８
には、角パイプを機体内方に向けて、トラックフレーム
８の前後２箇所に突設してそれぞれ横向きフレーム９を
構成している。そして、それらの角パイプの先端部を、
前記支持フレーム７に嵌合して、支持フレーム７と互い
に横方向で摺動に支持している。右側のクローラ走行装
置１のトラックフレーム８にも、角パイプを機体内方に
向けて、トラックフレーム８の前後２箇所に突設して、
それぞれ横向きフレーム９を構成し、それらの角パイプ
の先端部を、前記支持フレーム７に嵌合して、支持フレ
ーム７と互いに横方向で摺動自在に支持している。As shown in FIG. 2, a support frame 7 composed of a square pipe frame is provided on the machine base 2 so as to be connected in a front-rear direction with the longitudinal direction thereof extending along the left-right direction.
On the other hand, the track frame 8 of the left crawler traveling device 1
In FIG. 2, a horizontal pipe 9 is formed by projecting two square pipes in front of and behind a track frame 8 toward the inside of the machine. And, the tip of those square pipes,
The support frame 7 is fitted to the support frame 7 and slidably supports the support frame 7 in the lateral direction. On the track frame 8 of the crawler traveling device 1 on the right side, the square pipe is also provided at two places in front of and behind the track frame 8 with the square pipe directed toward the inside of the machine.
Each of the frames 9 constitutes a horizontal frame, and the ends of the square pipes are fitted to the support frame 7 to support the support frame 7 slidably in the horizontal direction.
【００１３】そして、左右のクローラ走行装置１同士の
間隔を変更調節するための複動型の左走行装置駆動用油
圧シリンダ１０と右走行装置駆動用油圧シリンダ１２と
を、前後の支持フレーム７の間に横方向に沿うように、
左右のクローラ走行装置１に各別に設けて、左右のクロ
ーラ走行装置１を機台２に対しそれぞれ独立して横移動
可能に構成してある。前記左右の走行装置駆動用油圧シ
リンダ１０，１２の両端部はトラックフレーム８と機台
２とにそれぞれ枢支連結してある。A double-acting hydraulic cylinder 10 for driving the left traveling device and a hydraulic cylinder 12 for driving the right traveling device for changing and adjusting the distance between the left and right crawler traveling devices 1 are connected to the front and rear support frames 7. So that it runs along the side
The left and right crawler traveling devices 1 are separately provided, and the left and right crawler traveling devices 1 are configured to be independently movable laterally with respect to the machine base 2. Both ends of the left and right traveling device driving hydraulic cylinders 10 and 12 are pivotally connected to the track frame 8 and the machine base 2 respectively.
【００１４】図４に示すように、前記旋回台３は、左右
のクローラ走行装置１が前記縦軸芯Ｘに最も近接した状
態で、その旋回台３の外周面の回動軌跡Ｓが、左右のク
ローラ走行装置１の左右外側端にほぼ接するように構成
してある。As shown in FIG. 4, when the left and right crawler traveling devices 1 are closest to the vertical axis X, the turning locus S of the outer circumferential surface of the turning table 3 The crawler traveling device 1 is configured to substantially contact the left and right outer ends.
【００１５】以上の構成によれば、左右のクローラ走行
装置１を機台２に対しそれぞれ独立して横移動可能に構
成してあるから、図５に示すように、クローラ走行装置
１の左右一方側の壁際の土を掘削する場合、壁Ｗとは反
対側のクローラ走行装置１を前記縦軸芯Ｘ側に寄せるこ
となく、壁Ｗ側のクローラ走行装置１だけを前記縦軸芯
Ｘ側に寄せて、前者を後者よりも前記縦軸芯から遠ざけ
た状態にして掘削作業を行うことができる。この場合、
左右のクローラ走行装置１が縦軸芯Ｘに最も近接した状
態で、旋回台３の外周面の回動軌跡Ｓが、前記左右のク
ローラ走行装置１の左右外側端にほぼ接するように構成
してあるから（図４参照）、壁際一杯まで確実に掘削す
ることができる。According to the above configuration, the left and right crawler traveling devices 1 are configured to be independently laterally movable with respect to the machine base 2, so that, as shown in FIG. When excavating the soil near the side wall, the crawler traveling device 1 on the side opposite to the wall W is not moved toward the vertical axis X, and only the crawler traveling device 1 on the wall W is positioned on the vertical axis X. In addition, excavation work can be performed with the former being more distant from the longitudinal axis than the latter. in this case,
In a state where the left and right crawler traveling devices 1 are closest to the vertical axis X, the rotation trajectory S of the outer peripheral surface of the revolving base 3 is configured to substantially contact the left and right outer ends of the left and right crawler traveling devices 1. Because of this (see FIG. 4), it is possible to excavate up to the wall as much as possible.
【００１６】そして、左右のクローラ走行装置１の間隔
を広くした状態で、壁際を掘削することができるから、
壁Ｗとは反対側に停車しているトラック２５に土を積み
込むために旋回台３を旋回させ、バックホウ装置６を横
に向かせたときも、機体のバランスを安定させることが
できる。Then, the wall can be excavated in a state where the distance between the left and right crawler traveling devices 1 is widened.
The balance of the fuselage can be stabilized even when the swivel base 3 is turned to load soil on the truck 25 stopped on the side opposite to the wall W and the backhoe device 6 is turned sideways.
【００１７】図２，図６（イ），（ロ）に示すように、
前記ドーザ１１は、主ドーザ１７と、この主ドーザ１７
の左右両端部にそれぞれ左右幅方向にスライド出退自在
に設けた補助ドーザ１８とから成り、主ドーザ１７の両
端背部に、左右一対の補助ドーザ出退駆動用油圧シリン
ダ１９，２０を、長手方向に沿うように各別に設けて、
主ドーザ１７からの補助ドーザ１８の出退によって、前
記ドーザ１１を一対のクローラ走行装置１の左右幅とほ
ぼ同幅に拡縮調節可能に構成してある。As shown in FIGS. 2, 6 (a) and 6 (b),
The dozer 11 includes a main dozer 17 and the main dozer 17.
Auxiliary dozers 18 are provided at both left and right ends of the main dozer 17 so as to be able to slide and retreat in the left and right width directions. Are provided separately so that
The dozer 11 is configured so as to be able to expand and contract to approximately the same width as the left and right widths of the pair of crawler traveling devices 1 by retracting the auxiliary dozer 18 from the main dozer 17.
【００１８】前記補助ドーザ１８は主ドーザ１７に背部
側から重ね合わせてある。そして補助ドーザ駆動用油圧
シリンダ１９，２０のピストン先端部を、補助ドーザ１
８の左右外方側の張出し端縁部に連結するとともに、補
助ドーザ駆動用油圧シリンダ１９，２０を覆う状態で補
助ドーザ１８の背部側に付設した角パイプ状のガイド部
２７を、主ドーザ１７の背部側の角形ガイドパイプ２８
にスライド自在に内嵌してある。The auxiliary dozer 18 is superimposed on the main dozer 17 from the back side. The distal ends of the pistons of the hydraulic cylinders 19 and 20 for driving the auxiliary dozer are connected to the auxiliary dozer 1.
8 and a guide part 27 in the form of a square pipe attached to the back side of the auxiliary dozer 18 in a state of covering the auxiliary dozer driving hydraulic cylinders 19 and 20 and connecting to the main dozer 17. Square guide pipe 28 on the back side of
Is slidably fitted inside.
【００１９】図３に示すように、前記左右の走行装置駆
動用油圧シリンダ１０，１２のそれぞれ一対づつの圧油
給排路１３，１４を、旋回台３の原動部の油圧ポンプか
ら機台２側へ圧油給排するためのロータリジョント１６
を介して旋回台３側に延出し、左右の走行装置駆動用油
圧シリンダ１０，１２を伸縮操作するための操作弁２３
に接続してある。左走行装置駆動用油圧シリンダ１０の
一方の圧油給排路１３と、右走行装置駆動用油圧シリン
ダ１２の一方の圧油給排路１４とは、ロータリジョント
１６よりも下方側で連通接続して、それらを１本の油路
にした状態でロータリジョント１６に入り込ませてあ
る。左走行装置駆動用油圧シリンダ１０の他方の圧油給
排路１３と、左走行装置駆動用油圧シリンダ１２の他方
の圧油給排路１４とに対しては、操作弁２３とロータリ
ジョント１６との間で切換え弁２２を設けて、ポンプか
らの作動油を両油路に択一的に給排可能に構成すること
で、両油圧シリンダ１０，１２への配管系のロータリジ
ョント１６に対する配管本数を３本に節減し、もってロ
ータリジョント１６の大型化を抑制してある。As shown in FIG. 3, a pair of hydraulic oil supply / discharge passages 13 and 14 of the right and left traveling device driving hydraulic cylinders 10 and 12 are respectively connected to a hydraulic pump of a driving part of the swivel base 3 by the machine base 2. 16 for supplying and discharging pressurized oil to the side
Operating valve 23 for extending and retracting the left and right traveling device driving hydraulic cylinders 10 and 12
Connected to One hydraulic oil supply / discharge passage 13 of the left traveling device driving hydraulic cylinder 10 and one hydraulic oil supply / discharge passage 14 of the right traveling device driving hydraulic cylinder 12 are connected to each other on a lower side than the rotary joint 16. Then, they are made to enter the rotary junction 16 in a state of being made into one oil passage. For the other hydraulic oil supply / discharge passage 13 of the left traveling device driving hydraulic cylinder 10 and the other hydraulic oil supply / discharge passage 14 of the left traveling device driving hydraulic cylinder 12, the operation valve 23 and the rotary joint 16 are provided. A switching valve 22 is provided between the hydraulic cylinders 10 and 12 to selectively supply and discharge hydraulic oil from the pump to both oil passages. Is reduced to three, thereby suppressing an increase in the size of the rotary joint 16.
【００２０】前記操作弁２３は３位置切換え式であり、
この操作弁２３に対しては操作レバー２４を設けてあ
る。ロータリジョント１６には左右のクローラ走行装置
１を駆動させるための油圧モータと旋回台３上のモータ
操作部とに連通接続する油路（図示せず）が装備されて
いる。The operating valve 23 is of a three-position switching type,
An operation lever 24 is provided for the operation valve 23. The rotary joint 16 is provided with an oil passage (not shown) that is connected to a hydraulic motor for driving the left and right crawler traveling devices 1 and a motor operation unit on the swivel base 3.
【００２１】また、左右同じ側に位置する走行装置駆動
用油圧シリンダと補助ドーザ駆動用油圧シリンダとを同
期して駆動させる同期駆動手段２１を、左右いずれの側
に対しても設けてあり、この同期駆動手段２１は、左補
助ドーザ駆動用油圧シリンダ１９に対する作動油給排用
ポート２５を、左走行装置駆動用油圧シリンダ１０に、
右補助ドーザ駆動用油圧シリンダ２０に対する作動油給
排用ポート２６を、右走行装置駆動用油圧シリンダ１２
にそれぞれ設けてを構成してある。Further, synchronous drive means 21 for synchronously driving the traveling device driving hydraulic cylinder and the auxiliary dozer driving hydraulic cylinder located on the same side as the left and right sides are provided on both the left and right sides. The synchronous driving means 21 connects the hydraulic oil supply / discharge port 25 to the left auxiliary dozer driving hydraulic cylinder 19 to the left traveling device driving hydraulic cylinder 10,
The hydraulic oil supply / discharge port 26 for the right auxiliary dozer drive hydraulic cylinder 20 is connected to the right travel device drive hydraulic cylinder 12.
, Respectively.
【００２２】上記の構成によれば、左右の補助ドーザ駆
動用油圧シリンダ１９，２０で、主ドーザ１７から補助
ドーザ１８を左右幅方向に各別に出退させることがで
き、しかも、左右同じ側に位置する走行装置駆動用油圧
シリンダと補助ドーザ駆動用油圧シリンダとを同期駆動
手段２１で同期して駆動させることができるから、ドー
ザ１１を拡縮するには、走行装置駆動用油圧シリンダ１
０，２０を駆動操作するだけでよく、ドーザ１１の拡縮
作業を従来よりも簡単に行うことができる。According to the above configuration, the auxiliary dozers 18 can be respectively moved back and forth from the main dozer 17 in the left and right width directions by the left and right auxiliary dozer driving hydraulic cylinders 19 and 20. Since the located traveling device driving hydraulic cylinder and the auxiliary dozer driving hydraulic cylinder can be synchronously driven by the synchronous driving means 21, the traveling device driving hydraulic cylinder 1
Only the driving operation of the dozers 0 and 20 is required, and the work of enlarging and reducing the dozer 11 can be performed more easily than before.
【００２３】そして、補助ドーザ駆動用油圧シリンダ１
９，２０に対する作動油給排用油圧ホースを、ロータリ
ジョイント１６から延出することなく、走行装置駆動用
油圧シリンダ１０，２０の作動油給排用ポート２５，２
６から延出することができて、走行装置駆動用油圧シリ
ンダ１９，２０とロータリジョイント１６との間に、補
助ドーザ駆動用油圧シリンダ１９，２０の油圧ホースと
走行装置駆動用油圧シリンダ１０，２０の油圧ホースと
のいずれもが設けられることに起因する油圧ホースの収
容構造の複雑化を回避できる。The hydraulic cylinder 1 for driving the auxiliary dozer
The hydraulic oil supply / discharge ports 25, 2 of the traveling device drive hydraulic cylinders 10, 20, without extending the hydraulic oil supply / discharge hydraulic hoses for the drive cylinders 9, 20, from the rotary joint 16.
6 between the hydraulic cylinders 19, 20 for driving the traveling device and the rotary joint 16, the hydraulic hoses for the hydraulic cylinders 19, 20 for driving the auxiliary dozer and the hydraulic cylinders 10, 20 for driving the traveling device. It is possible to avoid complication of the accommodation structure of the hydraulic hose caused by providing both of the hydraulic hoses.
【００２４】〔別実施例〕前記補助ドーザ１８を主ドー
ザ１７から出退させる構造は、上記の実施例のような構
造に限られるものではなく、例えば、前記補助ドーザ１
８を主ドーザ１７の両端部に縦軸芯周りに前後揺動自在
に設けて、主ドーザ１７に沿うように前側に揺動させて
ドーザ１１の幅を拡大した状態と、主ドーザ１７の背部
側に折り畳まれるように後側に揺動させてドーザ１１の
幅を縮小した状態とに切換え自在に構成したものでもよ
い。[Alternative Embodiment] The structure for moving the auxiliary dozer 18 out of the main dozer 17 is not limited to the structure of the above-described embodiment.
8 is provided at both ends of the main dozer 17 so as to be able to swing back and forth around the longitudinal axis, and is swung forward along the main dozer 17 to increase the width of the dozer 11; A configuration in which the width of the dozer 11 is freely switched to a state in which the width of the dozer 11 is reduced by swinging to the rear side so as to be folded to the side may be used.
【００２５】前記クローラ走行装置１を、パンタグラフ
式の機構を介して機台２に対して駆動横移動するように
構成してもよい。The crawler traveling device 1 may be configured to be driven and moved relative to the machine base 2 via a pantograph-type mechanism.
【００２６】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.
【図１】バックホウを示す全体側面図FIG. 1 is an overall side view showing a backhoe.
【図２】クローラ走行装置及びその支持構造を示す一部
破断平面図FIG. 2 is a partially broken plan view showing a crawler traveling device and its support structure.
【図３】バックホウの走行部における油圧回路を示す回
路図FIG. 3 is a circuit diagram showing a hydraulic circuit in a traveling section of the backhoe.
【図４】左右のクローラ走行装置の幅を縮めた状態のバ
ックホウの全体平面図FIG. 4 is an overall plan view of the backhoe in a state where the widths of the right and left crawler traveling devices are reduced.
【図５】一方のクローラ走行装置のみを機体中心側から
離間させた状態のバックホウの全体平面図FIG. 5 is an overall plan view of the backhoe in a state where only one crawler traveling device is separated from the center of the fuselage;
【図６】（イ）接地状態のドーザ周りの一部切欠き側面
部 （ロ）地面から離れた状態のドーザ周りの側面部FIG. 6 (a) Partially notched side surface around dozer in ground contact state (b) Side surface around dozer in state away from ground
１ 走行装置 ２ 機台 １０ 左側に位置する走行装置駆動用油圧シリンダ １２ 右側に位置する走行装置駆動用油圧シリンダ １１ ドーザ １７ 主ドーザ１７ １８ 補助ドーザ１８ １９ 左側に位置する補助ドーザ１８駆動用油圧シリン
ダ ２０ 右側に位置する補助ドーザ１８駆動用油圧シリン
ダ ２１ 同期駆動手段 ２５ 作動油給排用ポート ２６ 作動油給排用ポートReference Signs List 1 traveling device 2 machine base 10 traveling device driving hydraulic cylinder located on left side 12 traveling device driving hydraulic cylinder located on right side 11 dozer 17 main dozer 17 18 auxiliary dozer 18 19 hydraulic cylinder for driving auxiliary dozer 18 located on left side Reference Signs List 20 Hydraulic cylinder for driving auxiliary dozer 18 located on right side 21 Synchronous driving means 25 Hydraulic oil supply / discharge port 26 Hydraulic oil supply / discharge port
Claims (2)
に左右間隔調節可能に設け、主ドーザ（１７）と、この
主ドーザ（１７）の左右両端部にそれぞれ左右幅方向に
出退自在に設けた補助ドーザ（１８）とから成るドーザ
（１１）を前記機台（２）に設けて、前記主ドーザ（１
７）からの前記補助ドーザ（１８）の出退によって、前
記ドーザ（１１）を前記一対の走行装置（１）の左右幅
とほぼ同幅に拡縮調節可能に構成してあるバックホウで
あって、 前記左右一対の走行装置（１）を各別に横移動させる左
右一対の走行装置駆動用油圧シリンダ（１０），（１
２）と、前記主ドーザ（１７）から前記補助ドーザ（１
８）を左右幅方向に各別に出退させる左右一対の補助ド
ーザ駆動用油圧シリンダ（１９），（２０）とを設ける
とともに、左右同じ側に位置する走行装置駆動用油圧シ
リンダと補助ドーザ駆動用油圧シリンダとを同期して駆
動させる同期駆動手段（２１）を、左右いずれの側に対
しても設けてあるバックホウ。1. A pair of left and right traveling devices (1) are mounted on a machine base (2).
And a dozer (11) comprising a main dozer (17) and an auxiliary dozer (18) provided at both left and right ends of the main dozer (17) so as to be able to move back and forth in the left-right width direction. The main dozer (1) is provided on the machine (2).
7) A backhoe wherein the dozer (11) is configured to be capable of adjusting the expansion and contraction to substantially the same width as the left and right widths of the pair of traveling devices (1) by retreating the auxiliary dozer (18) from 7). A pair of left and right traveling device driving hydraulic cylinders (10), (1) for laterally moving the pair of left and right traveling devices (1) separately.
2) and the auxiliary dozer (1) from the main dozer (17).
8) A pair of left and right auxiliary dozer driving hydraulic cylinders (19) and (20) for respectively retreating and retracting in the left and right width direction are provided, and a traveling device driving hydraulic cylinder and an auxiliary dozer driving are located on the same side. A backhoe provided with a synchronous driving means (21) for driving the hydraulic cylinder in synchronization with the hydraulic cylinder.
リンダ（１９）に対する作動油給排用ポート（２５）
を、左側に位置する走行装置駆動用油圧シリンダ（１
０）に、右側に位置する補助ドーザ駆動用油圧シリンダ
（２０）に対する作動油給排用ポート（２６）を、右側
に位置する走行装置駆動用油圧シリンダ（１２）にそれ
ぞれ設けて前記同期駆動手段（２１）を構成してある請
求項１記載のバックホウ。2. A hydraulic oil supply / discharge port (25) for an auxiliary dozer driving hydraulic cylinder (19) located on the left side.
To the traveling device driving hydraulic cylinder (1
0), a hydraulic oil supply / discharge port (26) for the auxiliary dozer driving hydraulic cylinder (20) located on the right side is provided in the traveling device driving hydraulic cylinder (12) located on the right side, and the synchronous drive means is provided. The backhoe according to claim 1, wherein (21) is constituted.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26794094A JP2875748B2 (en) | 1994-11-01 | 1994-11-01 | Backhoe |
| US08/410,521 US5638908A (en) | 1994-09-09 | 1995-03-27 | Apparatus for adjusting between crawler tracks of a working vehicle |
| DE69513927T DE69513927T2 (en) | 1994-09-09 | 1995-03-29 | Device for adjusting the caterpillar distance of a work vehicle |
| EP95104646A EP0705944B1 (en) | 1994-09-09 | 1995-03-29 | Apparatus for adjusting spacing between caterpillar tracks of a working vehicle |
| KR1019950007262A KR0159840B1 (en) | 1994-09-09 | 1995-03-31 | Apparatus for adjusting between crawler tracks of a working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26794094A JP2875748B2 (en) | 1994-11-01 | 1994-11-01 | Backhoe |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP178496A Division JPH08232297A (en) | 1996-01-09 | 1996-01-09 | Backhoe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08128067A JPH08128067A (en) | 1996-05-21 |
| JP2875748B2 true JP2875748B2 (en) | 1999-03-31 |
Family
ID=17451723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26794094A Expired - Lifetime JP2875748B2 (en) | 1994-09-09 | 1994-11-01 | Backhoe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2875748B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115748857B (en) * | 2022-11-30 | 2023-08-15 | 徐工集团工程机械股份有限公司 | Bulldozing device and engineering truck |
-
1994
- 1994-11-01 JP JP26794094A patent/JP2875748B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08128067A (en) | 1996-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19981210 |