JPH0663246B2 - Backhoe - Google Patents
BackhoeInfo
- Publication number
- JPH0663246B2 JPH0663246B2 JP3822887A JP3822887A JPH0663246B2 JP H0663246 B2 JPH0663246 B2 JP H0663246B2 JP 3822887 A JP3822887 A JP 3822887A JP 3822887 A JP3822887 A JP 3822887A JP H0663246 B2 JPH0663246 B2 JP H0663246B2
- Authority
- JP
- Japan
- Prior art keywords
- swing
- arm
- swing bracket
- angle
- hydraulic cylinder
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、機体に左右揺動自在にスィングブラケットを
設け、油圧シリンダによって上下揺動操作自在な掘削作
業用アームを前記スィングブラケットに設けてあるバッ
クホウに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a swing bracket swingable to the left and right on a machine body, and an excavation work arm that is swingable up and down by a hydraulic cylinder is provided on the swing bracket. Regarding a backhoe.
従来の上記バックホウは、スィングブラケットの揺動角
にかかわらず、常に前記油圧シリンダに対する供給油量
を、一定に調節してあった。In the conventional backhoe described above, the amount of oil supplied to the hydraulic cylinder is constantly adjusted to be constant regardless of the swing angle of the swing bracket.
しかし、スィングブラケットを大きく揺動させた状態で
掘削作業を行うと、掘削作業用アームを下降させて停止
操作した時に、アームの慣性によって機体が不安定とな
って、転倒する危険性があるために、人為的にアームを
ゆっくり下降操作したり、堀削土の掬い取り量が少なく
なるように操作しなければならず、作業性が悪く、安全
性を確保できない欠点があった。However, if excavation work is performed with the swing bracket largely rocked, when the excavation work arm is lowered and the stop operation is performed, the inertia of the arm makes the aircraft unstable and there is a risk of falling. In addition, the arm must be artificially slowly moved down or operated so that the amount of scooping excavated soil is reduced, resulting in poor workability and inability to secure safety.
本発明の目的は、スィングブラケットを大きく揺動させ
て掘削作業を行っても、機体が不安定にならないように
する点にある。An object of the present invention is to prevent the machine body from becoming unstable even when excavation work is performed by swinging the swing bracket largely.
本発明のバックホウの特徴構成は、スィングブラケット
の揺動角を検出する角度検出手段を設けると共に、アー
ム用油圧シリンダに対する供給油量の調節手段を設け、
前記角度検出手段からの検出結果に基づいて、前記スィ
ングブラケットの揺動角が大きくなるに伴ってアームの
下降速度を自動的に減少させるように油量変更指令を前
記調節手段に指示する自動調速手段を設けてあることに
あり、その作用効果は、次の通りである。The characteristic configuration of the backhoe of the present invention is to provide an angle detection means for detecting the swing angle of the swing bracket, and a means for adjusting the amount of oil supply to the arm hydraulic cylinder
Based on the detection result from the angle detection means, an automatic adjustment command is issued to the adjustment means so as to automatically decrease the descending speed of the arm as the swing angle of the swing bracket increases. Since the speed means is provided, the operation and effect thereof are as follows.
つまり、スィングブラケットを大きく揺動させると、角
度検出手段による検出で自動調速手段が調節手段に油量
変更指令を指示し、アームの下降速度を自動的に減少さ
せるために、アームの下降操作時の慣性が小さくなり、
アームの下降停止を行っても機体が不安定になりにく
い。In other words, when the swing bracket is swung greatly, the automatic speed control means instructs the adjusting means to change the oil amount by the detection by the angle detecting means, and the lowering speed of the arm is automatically decreased so that the lowering operation of the arm is performed. Inertia of time becomes small,
The aircraft is less likely to become unstable even if the arm descends and stops.
従って、従来のように人為操作によってアームをゆっく
り下降させたり、掘削土の掬い取り量を制限したりする
のに比べて、自動的にアームの下降速度が減少されて、
アーム下降操作時の機体の安定性が良好に維持されるた
めに、作業性を良好にしながら、掘削作業における安定
性が確実になった。Therefore, as compared with the conventional method of slowly lowering the arm by manual operation or limiting the scooping amount of excavated soil, the lowering speed of the arm is automatically reduced,
Since the stability of the airframe during the arm lowering operation is maintained well, the stability in excavation work is ensured while improving the workability.
次に、本発明の実施例を、図面に基づいて説明する。 Next, an embodiment of the present invention will be described with reference to the drawings.
第２図に示すように、左右一対のクローラ式走行装置
（１）を備えた機台に、旋回台（２）を縦向き軸芯（Ｐ
１）周りで旋回操作自在に取付け、その旋回台（２）
に、運転キャビン（３）、及び、原動部（４）を設ける
と共に、先端部に掘削バケット（５）を取付けた上下揺
動並びに屈伸操作自在な掘削作業用アーム（６）を、縦
向き軸芯（Ｐ２）周りで左右揺動操作自在なスィングブ
ラケット（７）を介して旋回台（２）の前端に、かつ、
上下揺動操作自在なドーザ装置（８）を機台の前端に夫
々取付け、もって、排土作業可能なバックホウを構成し
てある。As shown in FIG. 2, a swivel base (2) is attached to a machine shaft provided with a pair of left and right crawler type traveling devices (1) and a vertical axis (P
1 ) Mounted so that it can be swiveled around, and its swivel base (2)
In addition, an operating cabin (3) and a driving part (4) are provided, and an excavation arm (6) that is vertically swingable and bendable / extendable with an excavation bucket (5) attached to a tip end thereof is provided with a vertical shaft. At the front end of the swivel base (2) via a swing bracket (7) that can be pivoted left and right around the core (P 2 ), and
A dozer device (8) that can be vertically swung is attached to each of the front ends of the machine bases, thereby forming a backhoe capable of discharging soil.
そして、アーム（６）に対する枢支連結部、及び、アー
ム上下揺動用油圧シリンダ（13）に対する枢支連結部を
備えさせて側面視ほぼ「コ」の字状に形成したスィング
ブラケット（７）をボス（12）の上下に嵌合させた状態
で、スィングブラケット（７）とボス（12）とに亘って
枢支ピン（14）を挿通すると共に、スィングブラケット
（７）の横側に形成したシリンダ用ブラケット（15）と
旋回台フレームとに亘ってスィングシリンダ（16）を架
設し、そのスィングシリンダ（16）によりスィングブラ
ケット（７）を旋回台（２）に対して左右揺動操作する
ように構成してある。A swing bracket (7) having a pivotal connecting portion for the arm (6) and a pivotal connecting portion for the hydraulic cylinder (13) for swinging the arm vertically is formed into a substantially U-shape in a side view. With the boss (12) fitted above and below, the pivot pin (14) is inserted between the swing bracket (7) and the boss (12) and is formed on the side of the swing bracket (7). A swing cylinder (16) is installed over the cylinder bracket (15) and the swivel frame, and the swing cylinder (16) swings the swing bracket (7) left and right with respect to the swivel base (2). Is configured.
前記掘削作業用アーム（６）は、ブーム（6A）とブーム
（6A）に前後揺動自在に取付けたアーム部材（6B）とか
ら成り、アーム部材（6B）を前後揺動駆動するアーム部
材用油圧シリンダ（９）をブーム（6A）とアーム部材
（6B）とにわたって取付けてある。The excavation work arm (6) is composed of a boom (6A) and an arm member (6B) attached to the boom (6A) so as to be capable of swinging back and forth. For the arm member for driving the arm member (6B) to swing back and forth. A hydraulic cylinder (9) is attached across the boom (6A) and the arm member (6B).
第１図に示すように、前記スィングブラケット（７）の
揺動角を検出して電気信号を発信する角度検出センサー
（10）を旋回台（２）に設けると共に、油圧シリンダ
（13）と油圧ポンプ（11）との間に操作バルブ（CV）を
設け、油圧シリンダ（13）のボトム側と操作バルブ（C
V）とを接続する第１油路（Ｒ１）に、可変絞り装置（1
7）を介在し、角度検出センサー（10）からの角度検出
信号を受けて、スィングブラケット（７）の揺動角が大
きくなるに伴って漸次ブーム（6A）の昇降速度を自動的
に減少させるように油量変更指令を可変絞り装置（17）
に指示して絞り量を増大操作する自動調速手段（18）を
設けてある。As shown in FIG. 1, an angle detection sensor (10) for detecting the swing angle of the swing bracket (7) and transmitting an electric signal is provided on the swivel base (2), and a hydraulic cylinder (13) and a hydraulic cylinder (13) are provided. An operation valve (CV) is provided between the pump (11) and the bottom side of the hydraulic cylinder (13) and the operation valve (C).
V) is connected to the first oil passage (R 1 ) and the variable throttle device (1
7), the angle detection signal from the angle detection sensor (10) is received, and the vertical speed of the boom (6A) is automatically reduced gradually as the swing angle of the swing bracket (7) increases. Variable throttle device to change oil quantity command (17)
The automatic speed control means (18) for instructing to increase the aperture amount is provided.
（別実施例〕 前記自動調速手段（18）は、操作バルブ（CV）が、前記
第１油路（Ｒ１）をドレンタンク（Ｄ）に接続する切換
え位置にある時のみ作動するようにしてあっても良く、
即ち、ブーム（6A）の下降速度だけを、自動的に減少さ
せるように可変絞り装置（17）に指示するものであって
も良い。(Other embodiment) The automatic speed control means (18) is operated only when the operation valve (CV) is at the switching position for connecting the first oil passage (R 1 ) to the drain tank (D). You can
That is, the variable throttle device (17) may be instructed to automatically reduce only the descending speed of the boom (6A).
前記可変絞り装置（17）は、油圧シリンダ（13）のロッ
ド側と操作バルブ（CV）とを接続する第２油路（Ｒ２）
を介在してあっても良く、また第1,第２油路（Ｒ１），
（Ｒ２）に介在してあっても良い。The variable throttle device (17) includes a second oil passage (R 2 ) connecting the rod side of the hydraulic cylinder (13) and the operation valve (CV).
May be interposed, and the first and second oil passages (R 1 ),
It may be interposed in (R 2 ).
前記可変絞り装置（17）に代えて、油圧ポンプ（11）を
可変容量ポンプにし、自動調速手段（18）の指示によっ
て圧油の吐出量を変更調節しても良く、また、前記可変
絞り装置（17）に代えて、絞り量の異なった二位置切換
弁（19）を第３図に示すように第１油路（Ｒ１）に介在
すると共に、角度検出センサー（10）に代えて、スィン
グブラケット（７）が設定角以上大きく揺動すれば入り
又は切り作動するリミットスイッチ（20）を設け、リミ
ットスイッチ（20）の作動に基づいて、ソレノイドから
成る自動調速手段（18）が二位置切換弁（19）を絞り量
の大の位置に切換操作するように構成してあっても良
く、前記可変絞り装置（17）、及び可変容量ポンプ、並
びに、二位置切換弁（19）等を、供給油量の調節手段
（30）と総称する。Instead of the variable throttle device (17), the hydraulic pump (11) may be a variable displacement pump, and the discharge amount of the pressure oil may be changed and adjusted according to an instruction from the automatic speed control means (18). Instead of the device (17), a two-position switching valve (19) having a different throttle amount is provided in the first oil passage (R 1 ) as shown in FIG. 3, and instead of the angle detection sensor (10). A limit switch (20) is provided that can be turned on or off when the swing bracket (7) swings more than a set angle. Based on the operation of the limit switch (20), an automatic speed control means (18) consisting of a solenoid is provided. The two-position switching valve (19) may be configured to switch to a position where the throttle amount is large, and the variable throttle device (17), the variable displacement pump, and the two-position switching valve (19). Etc. are collectively referred to as the oil supply amount adjusting means (30).
前記角度検出センサー（10）及びリミットスイッチ（2
0）を角度検出手段（31）と総称すると共に、角度検出
手段（31）と自動調速手段（18）を、電気式なものに代
え、機械式又は油圧式なものにしても良く、例えば、ス
ィングブラケット（７）の揺動角を機械的検出装置又は
油圧装置で検出して、機械連係装置によって前記調節手
段（30）を連係操作したり、油圧操作装置によって調節
手段（30）を操作するように自動調速手段（18）を構成
してもよい。The angle detection sensor (10) and the limit switch (2
0) is generically referred to as angle detection means (31), and the angle detection means (31) and the automatic speed control means (18) may be mechanical or hydraulic instead of electrical ones. , The swing angle of the swing bracket (7) is detected by a mechanical detection device or a hydraulic device, and the adjusting device (30) is operated by a mechanical cooperation device or the adjusting device (30) is operated by a hydraulic operation device. The automatic speed control means (18) may be configured to do so.
前記スィングブラケット（７）の揺動角増大に伴って前
記ブーム（6A）の速度を減少させる以外に、アーム部材
（6B）の速度を減少させるように、アーム部材用油圧シ
リンダ（９）への供給油量の自動調節を行わせるように
構成してあっても良い。In addition to decreasing the speed of the boom (6A) as the swing angle of the swing bracket (7) increases, the speed of the arm member (6B) is decreased to the arm member hydraulic cylinder (9). It may be configured to automatically adjust the amount of supplied oil.
尚、特許請求の範囲の項に図面との対照を便利にする為
に符号を記すが、該記入により本発明は添付図面の構造
に限定されるものではない。It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.
図面は本発明に係るバックホウの実施例を示し、第１図
は油圧操作構造の概略図、第２図はバックホウの全体側
面図、第３図は別実施例の油圧操作構造の概略図であ
る。 （６）……アーム、（７）……スィングブラケット、
（13）……油圧シリンダ、（18）……自動調速手段、
（30）……調節手段、（31）……角度検出手段。The drawings show an embodiment of a backhoe according to the present invention, FIG. 1 is a schematic view of a hydraulic operating structure, FIG. 2 is an overall side view of a backhoe, and FIG. 3 is a schematic view of a hydraulic operating structure of another embodiment. . (6) …… arm, (7) …… swing bracket,
(13) …… hydraulic cylinder, (18) …… automatic speed control means,
(30) …… Adjustment means, (31) …… Angle detection means.
Claims (1)
（７）を設け、油圧シリンダ（13）によって上下揺動操
作自在な掘削作業用アーム（６）を前記スィングブラケ
ット（７）に設けてあるバックホウであって、前記スィ
ングブラケット（７）の揺動角を検出する角度検出手段
（31）を設けると共に、前記油圧シリンダ（13）に対す
る供給油量の調節手段（30）を設け、前記角度検出手段
（31）からの検出結果に基づいて、前記スィングブラケ
ット（７）の揺動角が大きくなるに伴って前記アーム
（６）の下降速度を自動的に減少させるように油量変更
指令を前記調節手段（30）に指示する自動調速手段（1
8）を設けてあるバックホウ。1. A swing bracket (7) is swingably mounted on a machine body, and an excavation work arm (6) is swingably movable up and down by a hydraulic cylinder (13) on the swing bracket (7). The backhoe is provided with an angle detection means (31) for detecting the swing angle of the swing bracket (7) and an adjustment means (30) for the amount of oil supplied to the hydraulic cylinder (13). Based on the detection result from the means (31), the oil amount change command is issued so as to automatically decrease the descending speed of the arm (6) as the swing angle of the swing bracket (7) increases. Automatic speed control means (1)
8) A backhoe provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3822887A JPH0663246B2 (en) | 1987-02-20 | 1987-02-20 | Backhoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3822887A JPH0663246B2 (en) | 1987-02-20 | 1987-02-20 | Backhoe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63206535A JPS63206535A (en) | 1988-08-25 |
| JPH0663246B2 true JPH0663246B2 (en) | 1994-08-22 |
Family
ID=12519449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3822887A Expired - Lifetime JPH0663246B2 (en) | 1987-02-20 | 1987-02-20 | Backhoe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663246B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002206660A (en) * | 2000-11-10 | 2002-07-26 | Komatsu Ltd | Self-pressure switching valve and lead conductor of a propulsion device for a ground drill equipped with the self-pressure switching valve |
-
1987
- 1987-02-20 JP JP3822887A patent/JPH0663246B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63206535A (en) | 1988-08-25 |
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