JPH0124213Y2 - - Google Patents
Info
- Publication number
- JPH0124213Y2 JPH0124213Y2 JP5324083U JP5324083U JPH0124213Y2 JP H0124213 Y2 JPH0124213 Y2 JP H0124213Y2 JP 5324083 U JP5324083 U JP 5324083U JP 5324083 U JP5324083 U JP 5324083U JP H0124213 Y2 JPH0124213 Y2 JP H0124213Y2
- Authority
- JP
- Japan
- Prior art keywords
- arm
- end portion
- hydraulic motor
- brake
- 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
Links
- 238000009412 basement excavation Methods 0.000 description 6
- 235000007516 Chrysanthemum Nutrition 0.000 description 1
- 244000189548 Chrysanthemum x morifolium Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【考案の詳細な説明】
本考案は、ブームに揺動自在に取付けたアーム
を、アーム揺動用油圧シリンダ及び前記ブームに
連結されたアーム基端側部分と、バケツト及びバ
ケツト回動用シリンダを備えたアーム先端側部分
に分割形成し、前記アーム先端側部分をその長手
方向への軸芯周りで油圧モータにより回転自在に
前記アーム基端側部分に取付けて、アーム回転に
より掘削作業の範囲や方向を拡大すると共に、ア
ーム回転操作を容易迅速に行えるように構成した
バツクホウ作業車の回転アーム用操作部に関す
る。[Detailed description of the invention] The present invention comprises an arm swingably attached to a boom, an arm swinging hydraulic cylinder, an arm proximal end portion connected to the boom, a bucket and a bucket rotation cylinder. The distal end portion of the arm is formed separately, and the distal end portion of the arm is rotatably attached to the proximal end portion of the arm around its longitudinal axis by a hydraulic motor, and the range and direction of excavation work is controlled by rotation of the arm. The present invention relates to an operating section for a rotary arm of a backhoe work vehicle, which is enlarged and configured so that arm rotation operation can be performed easily and quickly.
従来、アーム先端側部分のアーム基端側部分に
対する回転を阻止するに、単に油圧モータを油圧
ロツクするだけであつたため、バケツトに大きい
掘削反力が繰返して加えられると、油洩れによつ
てアーム先端側部分が不測に回つてしまう欠点が
あつた。 Conventionally, the only way to prevent rotation of the tip end of the arm relative to the base end of the arm was to simply lock the hydraulic motor, so if a large excavation reaction force is repeatedly applied to the bucket, the arm may become damaged due to oil leakage. There was a drawback that the tip side part could turn unexpectedly.
本考案は、上記実情に鑑みて、アーム先端側部
分をアーム基端側部分に強固に固定できるよう
に、かつ、そのために操作が面倒になることを防
止できるようにすることを目的とする。 In view of the above-mentioned circumstances, it is an object of the present invention to make it possible to firmly fix the distal end portion of the arm to the proximal end portion of the arm, and to prevent the operation from becoming cumbersome due to this.
本考案は、冒記バツクホウ作業車において、前
記アーム基端側部分に対するアーム先端側部分の
回転を阻止するネガテイブブレーキを、油圧シリ
ンダにより作用解除、自在に設け、前記ブレーキ
用油圧シリンダの油路に、前記油圧モータの作動
に際してのみブレーキ解除用圧油が供給されるよ
うに、前記油圧モータの操作に連係して自動操作
される制御弁を設けたことを特徴とし、その作用
効果は次の通りである。 In the above-mentioned backhoe work vehicle, the present invention provides a negative brake that prevents rotation of the distal end portion of the arm with respect to the proximal end portion of the arm, which can be freely released by a hydraulic cylinder, and is provided in the oil passage of the brake hydraulic cylinder. , characterized in that a control valve is provided that is automatically operated in conjunction with the operation of the hydraulic motor so that pressure oil for brake release is supplied only when the hydraulic motor is activated, and its effects are as follows. It is.
つまり、アーム先端側部分を回転させる油圧モ
ータを停止した時には、ネガテイブブレーキがス
プリングの作用によつて機械的に制動作用状態に
なり、アーム基端側部分に対するアーム先端側部
分の固定が、前記従来構成のように油洩れによる
悪影響を受けること無く、確実かつ強固に行われ
るのであり、したがつて、バケツトの掘削反力が
大きくても、また、長時間掘削作業を継続して
も、アーム基端側部分に対するアーム先端側部分
の向きを確実に設定通りに維持できて、掘削作業
を所望通り良好に行えるようになつた。 In other words, when the hydraulic motor that rotates the distal end of the arm is stopped, the negative brake is mechanically activated by the action of the spring, and the distal end of the arm is fixed to the proximal end of the arm, which is different from the conventional method. Unlike other constructions, excavation is carried out reliably and firmly without being adversely affected by oil leakage, and therefore, even if the reaction force of the bucket is large or the excavation work continues for a long time, the arm base remains stable. It is now possible to reliably maintain the orientation of the tip end portion of the arm relative to the end portion as set, allowing the excavation work to be performed satisfactorily as desired.
その上、油圧モータの駆動停止操作に連係し
て、ネガテイブブレーキを油圧操作させることに
よつて、ネガテイブブレーキを油圧モータと各別
操作する場合に比して操作及び操作構成を簡単に
でき、全体として、掘削性能及び操作性に優れた
バツクホウ作業車を経済的に提供できるようにな
つた。 Furthermore, by hydraulically operating the negative brake in conjunction with the drive/stop operation of the hydraulic motor, the operation and operating configuration can be simplified compared to when the negative brake is operated separately from the hydraulic motor. As a result, it has become possible to economically provide a backhoe work vehicle with excellent excavation performance and operability.
次に、第１図ないし第３図により実施例を示
す。 Next, an embodiment will be shown with reference to FIGS. 1 to 3.
第１図に示すように、ドーザ装置１を備えたク
ローラ式走行装置２に、運転キヤビン３及び原動
部４を備えた旋回台５を設け、旋回台５に油圧シ
リンダC1により左右回動操作自在に取付けたブ
ラケツト６に、ブーム７、アーム８及びバケツト
９、並びに、それらを各別駆動する油圧シリンダ
C2，C3，C4からなるバツクホウ装置を取付けて、
排土作業が可能なバツクホウ作業車を構成してあ
る。 As shown in FIG. 1, a crawler type traveling device 2 equipped with a dozer device 1 is provided with a swivel base 5 equipped with an operating cabin 3 and a driving unit 4, and the swivel base 5 is operated to rotate left and right by a hydraulic cylinder C1. A boom 7, an arm 8, a bucket 9, and hydraulic cylinders that drive each of them separately are attached to a freely attached bracket 6.
Attach a backhoe device consisting of C 2 , C 3 and C 4 ,
It is configured as a backhoe work vehicle that can perform earth removal work.
第２図及び第３図に示すように、アーム８を基
端側部分８ａと先端側部分８ｂに分割形成し、ア
ーム基端側部分８ａにブーム７用連結部１０及び
アーム揺動用油圧シリンダC3の連結部１１を、
かつ、アーム先端側部分８ｂにバケツト９用連結
部２９、バケツト駆動用リンク１２の連結部１３
及びバケツト回動用シリンダC4の連結部１４を
夫々設けてある。そして、アーム先端側部分８ｂ
に一体連設したピン１５を、プレートベアリング
１６ａ，１６ｂを介してアーム基端側部分８ａに
アーム長手方向軸芯Ｐ周りで回転自在に取付け、
アーム基端側部分８ａの横側壁に取付けた油圧モ
ータＭの出力軸１７とピン１５をウオームギア１
８とウオームホイール１９により連動させ、運転
キヤビン３内の操作具２０によるバルブＶの操作
で、アーム先端側部分８ａの正逆転及び停止操作
を行えるように構成してある。 As shown in FIGS. 2 and 3, the arm 8 is divided into a proximal end portion 8a and a distal end portion 8b, and the arm proximal end portion 8a has a connecting portion 10 for the boom 7 and a hydraulic cylinder C for swinging the arm. 3 connecting part 11,
In addition, a connecting portion 29 for the bucket belt 9 and a connecting portion 13 for the bucket driving link 12 are provided on the arm tip side portion 8b.
and a connecting portion 14 for a bucket rotation cylinder C4 . And the arm tip side portion 8b
A pin 15 integrally connected to the arm is attached to the base end portion 8a of the arm via plate bearings 16a and 16b so as to be rotatable around the longitudinal axis P of the arm.
The output shaft 17 and pin 15 of the hydraulic motor M attached to the side wall of the arm base end portion 8a are connected to the worm gear 1.
8 and a worm wheel 19, and by operating the valve V using an operating tool 20 in the operating cabin 3, the arm tip end portion 8a can be rotated forward, reversed, and stopped.
ピン１５に係合したテコ２１を、ピン１５の軸
受部２２との接当部２３を支点としてピン１５長
手方向に揺動自在に設け、皿バネ等のスプリング
２４を、テコ２１にピン２５連結されたロツド２
６のスプリング受座２６ａに初期変形状態で作用
させて、スプリング２４によるテコ２１の揺動付
勢によつてピン１５が数トンの力で引張られ、ア
ーム基端側部分８ａとアーム先端側部分８ｂが圧
接部２７での摩擦により固定されるように構成
し、また、単動型ブレーキ用油圧シリンダ２８の
ピストンロツド２８ａをテコ２１にピン２５連結
して、その油圧シリンダ２８への圧油供給によつ
てテコ２１がスプリング２４に抗して制動解除方
向に揺動されるように構成し、もつて、アーム先
端側部分８ｂの回転に対するネガテイブブレーキ
Ｂを形成してある。 A lever 21 engaged with the pin 15 is provided so as to be swingable in the longitudinal direction of the pin 15 using the contact portion 23 with the bearing portion 22 of the pin 15 as a fulcrum, and a spring 24 such as a disc spring is connected to the lever 21 and the pin 25. Rod 2
6 is applied to the spring seat 26a in an initial deformed state, and the pin 15 is pulled with several tons of force by the rocking bias of the lever 21 by the spring 24, and the arm proximal end portion 8a and the arm distal end portion are The piston rod 28a of the hydraulic cylinder 28 for a single-acting brake is connected to the lever 21 by a pin 25 to supply pressure oil to the hydraulic cylinder 28. Therefore, the lever 21 is configured to be swung in the brake release direction against the spring 24, thereby forming a negative brake B against rotation of the arm tip end portion 8b.
油圧モータ操作用バルブＶにブレーキ用油圧シ
リンダ２８を接続して、そのシリンダ２８のロツ
ド側室２８ｂに油圧モータＭが正逆転される際に
のみ圧油が供給されるようにバルブＶの油路を形
成し、ネガテイブブレーキＢが油圧モータＭと連
係操作されるように構成してある。 A brake hydraulic cylinder 28 is connected to the hydraulic motor operation valve V, and the oil passage of the valve V is arranged so that pressure oil is supplied to the rod side chamber 28b of the cylinder 28 only when the hydraulic motor M is rotated forward or backward. The negative brake B is configured to be operated in conjunction with the hydraulic motor M.
次に、別の実施例を示す。 Next, another example will be shown.
アーム先端側部分８ａをアーム基端側部分８ｂ
に取付ける構成や油圧モータＭに連動させる構
成、並びに、ネガテイブブレーキＢの構成等は、
いずれも各種変更が自在であり、例えば圧接部２
７を菊座状に形成する等が可能である。 The arm distal end portion 8a is connected to the arm proximal end portion 8b.
The configuration to be attached to the hydraulic motor M, the configuration to be linked to the hydraulic motor M, and the configuration of the negative brake B are as follows.
All of them can be changed in various ways, for example, the pressure welding part 2
7 can be formed into a chrysanthemum shape.
油圧モータＭの操作に連係して自動的にネガテ
イブブレーキＢの油圧シリンダ２８を操作させる
に、例えば、それらモータＭとシリンダ２８に各
別の操作用バルブを、一個の操作具２０に機械
的、電気的あるいは油圧的に連動させて設ける
等、その他各種構成変更が可能であり、要する
に、ブレーキ用油圧シリンダ２８の油路に、油圧
モータＭの作動に際してのみブレーキ解除用圧油
が供給されるように、油圧モータＭの操作に連係
して自動操作される制御弁Ｖが設けてあればよ
い。 In order to automatically operate the hydraulic cylinder 28 of the negative brake B in conjunction with the operation of the hydraulic motor M, for example, separate operation valves are provided for the motor M and the cylinder 28, and a single operating tool 20 is mechanically operated. Various other configuration changes are possible, such as providing electrically or hydraulically interlocking, and in short, brake release pressure oil is supplied to the oil path of the brake hydraulic cylinder 28 only when the hydraulic motor M is activated. A control valve V that is automatically operated in conjunction with the operation of the hydraulic motor M may be provided.
本考案は、各種形式のバツクホウ作業車に適用
できる。 The present invention can be applied to various types of backhoe work vehicles.
図面は本考案の実施例を示し、第１図は作業車
の全体側面図、第２図はアームの正面図、第３図
は第２図の−縦断面図である。
７……ブーム、８……アーム、８ａ……アーム
基端側部分、８ｂ……アーム先端側部分、９……
バケツト、２８……ブレーキ用油圧シリンダ、Ｂ
……ネガテイブブレーキ、C3……アーム揺動用
油圧シリンダ、C4……バケツト揺動用油圧シリ
ンダ、Ｍ……油圧モータ、Ｖ……制御弁。
The drawings show an embodiment of the present invention, in which FIG. 1 is an overall side view of the working vehicle, FIG. 2 is a front view of the arm, and FIG. 3 is a vertical cross-sectional view taken from FIG. 2. 7...Boom, 8...Arm, 8a...Arm base end portion, 8b...Arm tip side portion, 9...
Bucket, 28... Brake hydraulic cylinder, B
...Negative brake, C 3 ... Hydraulic cylinder for arm swing, C 4 ... Hydraulic cylinder for bucket swing, M ... Hydraulic motor, V ... Control valve.
Claims (1)
ーム揺動用油圧シリンダC3及び前記ブーム７に
連結されたアーム基端側部分８ａと、バケツト９
及びバケツト回動用シリンダC4を備えたアーム
先端側部分８ｂに分割形成し、前記アーム先端側
部分８ｂをその長手方向への軸芯Ｐ周りで油圧モ
ータＭにより回転自在に前記アーム基端側部分８
ａに取付けたバツクホウ作業車において、前記ア
ーム基端側部分８ａに対するアーム先端側部分８
ｂの回転を阻止するネガテイブブレーキＢを、油
圧シリンダ２８により作用解除自在に設け、前記
ブレーキ用油圧シリンダ２８の油路に、前記油圧
モータＭの作動に際してのみブレーキ解除用圧油
が供給されるように、前記油圧モータＭの操作に
連係して自動操作される制御弁Ｖを設けてあるバ
ツクホウ作業車の回転アーム用操作部。 An arm 8 swingably attached to the boom 7 is connected to a hydraulic cylinder C 3 for swinging the arm, an arm base end portion 8a connected to the boom 7, and a bucket 9.
The arm tip end portion 8b is divided into an arm distal end portion 8b having a bucket rotation cylinder C4 , and the arm proximal end portion is rotatably rotated by a hydraulic motor M around an axis P in the longitudinal direction. 8
In the backhoe work vehicle attached to
A negative brake B for preventing the rotation of the hydraulic motor M is provided so that its action can be freely released by a hydraulic cylinder 28, and pressure oil for brake release is supplied to the oil passage of the brake hydraulic cylinder 28 only when the hydraulic motor M is operated. and a control valve V that is automatically operated in conjunction with the operation of the hydraulic motor M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5324083U JPS59160656U (en) | 1983-04-09 | 1983-04-09 | Control unit for rotating arm of backhoe work vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5324083U JPS59160656U (en) | 1983-04-09 | 1983-04-09 | Control unit for rotating arm of backhoe work vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59160656U JPS59160656U (en) | 1984-10-27 |
| JPH0124213Y2 true JPH0124213Y2 (en) | 1989-07-24 |
Family
ID=30183588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5324083U Granted JPS59160656U (en) | 1983-04-09 | 1983-04-09 | Control unit for rotating arm of backhoe work vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59160656U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH079099B2 (en) * | 1985-07-26 | 1995-02-01 | 株式会社小松製作所 | Control device for power shovel |
-
1983
- 1983-04-09 JP JP5324083U patent/JPS59160656U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59160656U (en) | 1984-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3805632B2 (en) | Bulldozer and pitch control system | |
| WO2007111158A1 (en) | Wheel loader | |
| JPH0124213Y2 (en) | ||
| US3247986A (en) | Tool connection units for earth working machinery | |
| US4950127A (en) | Rotary dipper stick | |
| JPH10266260A (en) | Arranging structure of hydraulic oil pipe and the like of work machine | |
| US4952116A (en) | Rotary dipper stick | |
| JPH11117342A (en) | Shovel system excavator and front attachment | |
| JP2812554B2 (en) | Rotating dipper stick assembly | |
| JP4481264B2 (en) | Wheel brake autobrake method and wheel loader | |
| JPH01235731A (en) | Service car, particularly, tractor shovel | |
| JPS6246019Y2 (en) | ||
| JP3216742B2 (en) | Power shovel | |
| JPH072738Y2 (en) | Swivel | |
| JP4481265B2 (en) | Wheel loader | |
| JPH0321727A (en) | Hydraulic shovel | |
| JPH0716184Y2 (en) | Work vehicle operation lever mounting structure | |
| JPS6220528Y2 (en) | ||
| JP2617799B2 (en) | Swivelable open / close bucket device | |
| JPH035942Y2 (en) | ||
| JPH041261U (en) | ||
| JPH0344840Y2 (en) | ||
| JPS5934517Y2 (en) | operating device | |
| JPH0327102Y2 (en) | ||
| JPS5813367Y2 (en) | Operation structure |