JP3493224B2 - Steering operation device of traveling work machine - Google Patents
Steering operation device of traveling work machineInfo
- Publication number
- JP3493224B2 JP3493224B2 JP21756994A JP21756994A JP3493224B2 JP 3493224 B2 JP3493224 B2 JP 3493224B2 JP 21756994 A JP21756994 A JP 21756994A JP 21756994 A JP21756994 A JP 21756994A JP 3493224 B2 JP3493224 B2 JP 3493224B2
- Authority
- JP
- Japan
- Prior art keywords
- side clutch
- steering
- time
- switch
- lever
- 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
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明はコンバイン或はバックフ
ォー等の農業又は建設機械等の作業車の運転部に設置し
た操作レバーで、サイドクラッチ機構を操作することに
より操向操作を行なう走行作業機の操向操作装置に関す
る。
【０００２】
【従来の技術】従来、前記のような作業車においてサイ
ドクラッチ機構を操作する操作レバーは、運転部に立設
されてその中立位置から左右両側に択一的に傾倒操作可
能になされ、その傾倒量を小さく操作する場合には第１
段目にサイドクラッチのみを切って操向旋回させるとと
もに、大きく操作した場合は第２段目にブレーキを作動
させて信地旋回を行なうものが知られている。
【０００３】また、前記のようなレバー操作ではレバー
の傾倒ストローク調整が行ないにくく、微小な旋回を行
なうときに操作レバーを倒し過ぎてサイドクラッチを長
い時間切り過ぎたり、不用意にブレーキ制動させて機体
を大きく旋回させる等の不具合がある。このような点を
考慮して前記サイドクラッチ機構を操作するスイッチを
刈取部等の作業機を昇降させるレバーの上部に設け、こ
のスイッチを左右択一的にＯＮ、ＯＦＦ操作することに
より操向操作を簡単に行なうようにした操向操作装置が
特開昭６２−２０８２０４号公報によって提案されてい
る。
【０００４】
【発明が解決しようとする課題】しかし、前記公報に記
載された装置は操作スイッチを左右いずれかの方向に押
動操作している時間だけサイドクラッチ機構のサイドク
ラッチを切り、またはこれに加えてブレーキを制動させ
るものであり、この点では前者の操作レバーによる操向
操作方式と何ら変らないものであった。
【０００５】従って微小な旋回操作を頻繁に要するコン
バインによる刈取り作業時等において、人為的に押動時
間の調整を常時正確に行なうことが困難なことから、操
作スイッチの押し過ぎ、またはＯＮ時間を継続させすぎ
ることにより、サイドクラッチ機構を長時間切り作動さ
せて機体を大きく旋回させることがあり、この場合には
刈取り作業を乱す等の操作性に問題があった。また、前
記のような微小なスイッチ操作を人為的に行なうことは
熟練を要し作業が煩雑となり能率を低下させる等の問題
があった。
【０００６】
【課題を解決するための手段】前記問題点を解消するた
め本発明は、作業車１の運転部３に設置した操作レバー
２を中立位置から両側に択一的に傾倒操作することによ
り、その第１段目の傾倒操作でサイドクラッチ機構７，
７ａのクラッチのみを切って操向旋回させるとともに、
第２段目の傾倒操作によりブレーキを制動させて信地旋
回を行なうように構成した作業車の操向操作装置におい
て、前記操作レバー２にサイドクラッチのみを切って操
向旋回させる操作スイッチ１１を付設し、該操作スイッ
チ１１は制御部１０を介してサイドクラッチ機構７，７
ａの駆動装置８２，８２に連繋され、該制御部１０は操
作スイッチ１１がＯＮ操作を継続されるとき、その操作
初期から所定時間〔ｔ1 〕は前記サイドクラッチ機構
７，７ａの駆動装置８２をＯＮ動作し、該所定時間〔ｔ
1 〕経過後は設定時間〔ｔ2 〕だけＯＦＦ動作し、その
後は操作スイッチ１１のＯＮ操作時間までＯＮさせるよ
うに構成している。
【０００７】
【作 用】操作スイッチ１０をＯＮさせるその初期にお
いて所定時間〔ｔ1 〕にわたってサイドクラッチを単発
的に切ることができるので、機体の小旋回を誤りなく簡
単に行なうことができるとともに、必要に応じてサイド
クラッチを継続して切ることができるので大旋回をも容
易に行なうことができる。
【０００８】
【実 施 例】以下、図面に基づいて説明する。図１は
本発明に関する作業車の一例としてコンバイン１におけ
る操向操作装置の操作回路を示し、３は操作レバー２及
び走行変速レバー２ａ等が設置された運転部であり、４
はエンジン５から無段変速プーリ機構等を介して駆動伝
動される伝動ケースであり、この伝動ケース４中には前
記走行変速レバー２ａで操作される前後進変速機構４
ａ、及び左右のクローラ走行装置（不図示）の駆動スプ
ロケット６，６への伝動を操作レバー２の左右動で断続
し、また、制動する公知のサイドクラッチとブレーキを
併設したサイドクラッチ機構７，７ａとが設けられてい
る。
【０００９】８は、コンバイン１の機体の前方で操作レ
バー２の前後操作により図示しないスイッチを択一的に
ＯＮさせて昇降動作可能に設けられた刈取部であり、そ
の前方両側に位置するデバイダ８ａ，８ａには刈巾内に
触片８１を回動可能に突設した公知の機構からなる方向
センサ８０を設け、ハーネス回路を介しマイコンを内蔵
する制御部１０に接続し、前記方向センサ８０の穀稈感
知により従来のものと同様にこの制御部１０の指令によ
って左右のソレノイドピン（図示せず）を作動してそれ
ぞれ対応するサイドクラッチ７，７ａを断続して駆動ス
プロケット６，６の動力を断続するようにしている。
【００１０】なお、操作レバー２は左右に操作するとス
イッチ９ａ，又は９ｂがＯＮして制御部１０は油圧バル
ブ２ｂを強制的に切換えて、前記方向センサ８０の操向
作動に優先して油圧シリンダからなる駆動装置８２，８
２を操作してサイドクラッチ７，７ａを切換えて操向操
作可能にしている。更に、前記サイドクラッチ機構７，
７ａは前記操作レバー２がその中立位置から左右両側の
いずれかに択一的に操作されるとき、その傾倒量によっ
て小さく傾倒された場合には上述のように第１段目にサ
イドクラッチ７，７ａが切られ、さらに大きく傾倒され
た場合には第２段目にブレーキが作動されるように連繋
されており、操作レバー２と左右のブレーキとの連繋は
機械的に連繋しても良い外、操作レバーの第２段目の操
作位置を電気的に検出し、制御部１０の指令に基づいて
電磁切換弁を切換えてブレーキ作動用の油圧シリンダ
（図示せず）を作動させて行う。
【００１１】各操作スイッチ１１ａ，１１ｂを押し操作
することにより制御部１０を介してそれぞれ対応するサ
イドクラッチ機構７，７ａのサイドクラッチを図５のフ
ローチャートに示すように作動させ、図４のタイムチャ
ートに示すように所定時間だけ切断及び接続させ、微小
旋回を所望に行なうようにしている。即ち、図４に示す
ように左又は右操作スイッチ１１ａを〔ｔ〕秒だけ押動
してＯＮさせた場合、タイマ１２が作動して所定時間
〔ｔ1 〕だけ操向バルブ２ｂをＯＮさせた後、これより
もやや長い設定時間〔ｔ2 〕だけＯＦＦさせ、この後操
作スイッチ１１ａがＯＮを継続されている時間だけＯＮ
させるようにしている。
【００１２】このとき、時間〔ｔ1 〕はサイドクラッチ
７，７ａが実際に切れる最小時間以上の短時間内に設定
する。そして時間〔ｔ1 ＋ｔ2 〕は人為的に操作スイッ
チを操作する際、スイッチ操作を行なったのにサイドク
ラッチ７，７ａが切れない（例えばこのクラッチ系統の
故障等によって切れないような現象）と感ずる時間内に
設定してある。
【００１３】そして操向バルブ２ｂが前記のように切換
え作動されるとき、サイドクラッチ７，７ａは油圧シリ
ンダ８２を介しては機械的な応答遅れの時間〔ｔ3 〕
（略０．０５秒程度）後に、〔ｔ4 〕秒間の短い時間だ
け単発的にサイドクラッチが実際に切られて動力が切断
されることにより、操作方向への微小旋回を許容するこ
とができる。
【００１４】以上のような機体の微小旋回をオペレータ
が認知し、非作動時間〔ｔ2 〕の間に操作スイッチ１１
ａ又は１１ｂの押動を解除すればサイドクラッチ（サイ
ドクラッチ機構７，７ａ）は元に接続されるから再び直
進走行をすることができる。以上のように構成した操向
操作装置を備えたコンバインで圃場に植立する穀稈を条
列に沿わせて刈取る刈取作業において、機体を少しだけ
旋回させて軌道修正したい場合にオペレータは所望方向
の操作スイッチ１１ａ又は１１ｂを単に押すだけで最小
の旋回を確実に行なうことができる。
【００１５】従って操作スイッチの押動時間及びその程
度に特別な神経を使うことが不要となり、又機体が不用
意に大きく旋回されることによる刈取り不良等の不具合
を伴うことのない良好な刈取り作業を、操作スイッチ１
１ａ，１１ｂを単にＯＮさせるだけの簡単な操作で能率
よく容易に行なうことができる。なお、圃場端部の機体
旋回時等においては、操作レバー２を左右に傾動操作す
れば短時間に機体を大きく旋回させることができ、ま
た、前記操作スイッチ１１ａ，１１ｂを操作レバー２の
頭部に設けることにより、手の持替え操作を必要とせ
ず、それらの旋回形態を即座に選択することができる。
【００１６】
【効 果】本発明はに係る作業車の操向操作装置は、作
業車１の運転部３に設置した操作レバー２を中立位置か
ら両側に択一的に傾倒操作することにより、その第１段
目の傾倒操作でサイドクラッチ機構７，７ａのクラッチ
のみを切って操向旋回させるとともに、第２段目の傾倒
操作によりブレーキを作動させて信地旋回を行なうよう
に構成した走行作業機の操向操作装置において、前記操
作レバー２にサイドクラッチのみを切って操向旋回を行
なわせる操作スイッチ１１を付設し、該操作スイッチ１
１は制御部１０を介してサイドクラッチ７，７ａの駆動
装置８２，８２に連繋され、制御部１０は操作スイッチ
１１がＯＮ操作を継続されるとき、その操作初期から所
定時間〔ｔ1 〕は前記サイドクラッチ機構７，７ａの駆
動装置８２をＯＮ動作し、該所定時間〔ｔ1 〕経過後は
設定時間〔ｔ2 〕だけＯＦＦ動作し、その後は操作スイ
ッチ１１のＯＮ操作時間までＯＮさせるように構成して
いる。
【００１７】従って、操作スイッチ１１（１１ａ，１１
ｂ）を単にＯＮさせるだけの簡単な操作で微小旋回を誤
りなく確実、且つ容易に行なうことができるので、正確
な走行作業を能率よく行うことができる。また操作スイ
ッチ１１のＯＮ動作に特別に配慮することなく微小旋回
ができるので、熟練を要することなく、またオペレータ
の疲労を軽減することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation lever installed in a driving unit of a working vehicle such as an agricultural or construction machine such as a combine or a back fork, for operating a side clutch mechanism. The present invention relates to a steering operation device of a traveling work machine that performs a steering operation by performing a steering operation. 2. Description of the Related Art Conventionally, an operation lever for operating a side clutch mechanism in a work vehicle as described above is provided upright in a driving section, and can be selectively tilted to the left or right from a neutral position thereof. However, if the tilt amount is to be reduced, the first
It has been known that a steerable turn is performed by disengaging only the side clutch at the first gear, and a brake is actuated at the second gear to perform a pivot turn when a large operation is performed. [0003] Further, it is difficult to adjust the tilting stroke of the lever by the lever operation as described above, and the lever is depressed too much to make the side clutch disengage for a long time when making a small turn, or the brake is inadvertently braked. There is a problem such as turning the aircraft greatly. In consideration of such a point, a switch for operating the side clutch mechanism is provided on an upper part of a lever for raising and lowering a work machine such as a reaper, and this switch is selectively turned on and off to perform a steering operation. Has been proposed by JP-A-62-208204. [0004] However, in the device described in the above publication, the side clutch of the side clutch mechanism is disengaged for the time during which the operation switch is pushed in either the left or right direction, or In addition to this, the brake is braked, and in this respect, the steering operation method using the former operation lever is not different at all. [0005] Therefore, during harvesting work by a combine that requires frequent fine turning operations, it is difficult to always accurately adjust the pushing time manually. If the continuation is too long, the side clutch mechanism may be disengaged for a long time to turn the machine greatly, and in this case, there is a problem in operability such as disturbing the reaping operation. In addition, there is a problem that performing the above-mentioned minute switch operation artificially requires skill, the operation is complicated, and the efficiency is reduced. [0006] In order to solve the above-mentioned problems, the present invention is to selectively tilt the operation lever 2 installed on the driving unit 3 of the work vehicle 1 from the neutral position to both sides. As a result, the side clutch mechanism 7,
With only the clutch 7a disengaged and steered and turned,
In a steering operation device for a working vehicle configured to perform a pivot turn by braking a brake by a tilt operation of a second stage, an operation switch 11 that turns only the side clutch to the operation lever 2 and turns the steering lever. The operation switch 11 is attached to the side clutch mechanism 7, 7 via the control unit 10.
When the operation switch 11 is continuously turned on, the control unit 10 controls the drive unit 82 of the side clutch mechanisms 7, 7a for a predetermined time [t 1 ] from the initial stage of the operation. Is turned ON, and the predetermined time [t
1 ] After the lapse of time, the switch is turned off for a set time [t 2 ], and thereafter the switch is turned on until the operation time of the operation switch 11 is turned on. [0007] Since the side clutch can be disengaged for a predetermined time [t 1 ] at the initial stage when the operation switch 10 is turned on, small turning of the aircraft can be easily performed without error. Since the side clutch can be continuously disengaged as necessary, a large turning can be easily performed. An embodiment will be described below with reference to the drawings. FIG. 1 shows an operation circuit of a steering operation device in a combine 1 as an example of a work vehicle according to the present invention. Reference numeral 3 denotes an operation unit provided with an operation lever 2, a traveling speed change lever 2a, and the like.
Reference numeral denotes a transmission case which is driven and transmitted from the engine 5 via a continuously variable transmission pulley mechanism or the like. The transmission case 4 includes a forward / reverse transmission mechanism 4 operated by the traveling transmission lever 2a.
a, and transmission of the left and right crawler traveling devices (not shown) to the driving sprockets 6, 6 is intermittently performed by the left and right movements of the operation lever 2, and a side clutch mechanism 7, which is provided with a known side clutch and brake for braking, 7a. Numeral 8 denotes a mowing portion which is provided in front of the fuselage of the combine 1 and which can be turned on and off by selectively operating a switch (not shown) by operating the operating lever 2 back and forth. Dividers located on both front sides of the mowing portion are provided. 8a, 8a are provided with a direction sensor 80 composed of a known mechanism in which a touch piece 81 is rotatably protruded within the cutting width, and connected to a control unit 10 containing a microcomputer via a harness circuit. The left and right solenoid pins (not shown) are actuated by the command of the control unit 10 in the same manner as in the prior art by sensing the grain culm, and the corresponding side clutches 7, 7a are intermittently connected to drive the sprockets 6, 6. To be intermittent. When the operating lever 2 is operated left and right, the switch 9a or 9b is turned on, and the control unit 10 forcibly switches the hydraulic valve 2b, so that the hydraulic cylinder is given priority over the steering operation of the direction sensor 80. Drive devices 82, 8 comprising
2, the side clutches 7, 7a are switched to enable the steering operation. Further, the side clutch mechanism 7,
When the operation lever 2 is selectively operated from the neutral position to either the left or right side, the side clutch 7 is moved to the first stage as described above when the operation lever 2 is tilted slightly by the amount of tilt. When the lever 7a is turned off and tilted further, the brake is connected to the second stage so that the brake is operated, and the connection between the operation lever 2 and the left and right brakes may be mechanically connected. The operation is performed by electrically detecting the operation position of the second stage of the operation lever, switching the electromagnetic switching valve based on a command from the control unit 10, and operating a hydraulic cylinder (not shown) for brake operation. By pressing the operation switches 11a and 11b, the corresponding side clutches of the side clutch mechanisms 7 and 7a are operated via the control unit 10 as shown in the flowchart of FIG. 5, and the time chart of FIG. As shown in (1), disconnection and connection are performed only for a predetermined time, so that minute turning is performed as desired. That is, as shown in FIG. 4, when the left or right operation switch 11a is pushed and turned on for [t] seconds, the timer 12 is operated to turn on the steering valve 2b for a predetermined time [t 1 ]. Thereafter, the switch is turned off for a set time [t 2 ] slightly longer than this, and then turned on for a time during which the operation switch 11a is kept on.
I try to make it. At this time, the time [t 1 ] is set within a short time equal to or longer than the minimum time during which the side clutch 7, 7a is actually disengaged. During the time [t 1 + t 2 ], when the operation switch is manually operated, the side clutches 7 and 7a are not disengaged even though the switch is operated (for example, a phenomenon that the clutch is not disengaged due to a failure of the clutch system or the like). It is set within the time you feel. When the steering valve 2b is switched as described above, the side clutch 7, 7a receives a mechanical response delay time [t 3 ] via the hydraulic cylinder 82.
After that (approximately 0.05 seconds), the side clutch is actually disengaged only for a short time of [t 4 ] seconds, and the power is cut off, so that a slight turning in the operation direction can be permitted. . The operator recognizes the minute turning of the airframe as described above, and operates the operation switch 11 during the non-operation time [t 2 ].
If the pushing of the a or 11b is released, the side clutch (side clutch mechanism 7, 7a) is connected to the original state, so that the vehicle can travel straight ahead again. In a harvesting operation in which a grain stalk to be planted in a field is harvested along a row by a combine equipped with a steering operation device configured as described above, if the operator wants to slightly turn the aircraft and correct the trajectory, the operator may desire Simply pressing the directional operation switch 11a or 11b ensures a minimum turning. Therefore, it is not necessary to use a special nerve for the pressing time and the extent of the operation switch, and a good mowing operation without troubles such as poor mowing due to careless turning of the body. And operation switch 1
The operation can be performed efficiently and easily by a simple operation of simply turning on the 1a and 11b. At the time of turning the body at the end of the field or the like, the body can be largely turned in a short time by tilting the operation lever 2 left and right, and the operation switches 11a and 11b are moved to the head of the operation lever 2. , It is possible to immediately select one of these turning modes without the need for a hand-holding operation. According to the present invention, the steering operation device for a work vehicle according to the present invention is provided by selectively tilting the operation lever 2 installed on the driving unit 3 of the work vehicle 1 from the neutral position to both sides. The first stage of the tilting operation disengages only the clutches of the side clutch mechanisms 7 and 7a to steer and turn, and the second stage of the tilting operation activates the brake to perform a pivot turn. In the steering operation device for a work machine, an operation switch 11 for causing the operation lever 2 to perform steering rotation by disengaging only the side clutch is provided.
Numeral 1 is connected to driving devices 82, 82 of the side clutches 7, 7a via the control unit 10. When the operation switch 11 is continuously turned on, the control unit 10 operates for a predetermined time [t 1 ] from the initial operation. The drive device 82 of the side clutch mechanisms 7 and 7a is turned on, and after a lapse of the predetermined time [t 1 ], the drive device 82 is turned off for a set time [t 2 ]. It is composed. Accordingly, the operation switches 11 (11a, 11a)
The simple turning operation of simply turning on b) makes it possible to accurately and easily perform the fine turning without error, so that accurate running work can be performed efficiently. In addition, since the small turning can be performed without special consideration of the ON operation of the operation switch 11, the skill can be reduced and the fatigue of the operator can be reduced.
【図面の簡単な説明】
【図１】コンバインの操作機構及びその回路を示す平面
図である。
【図２】運転部の平面図である。
【図３】操作スイッチの回路図である。
【図４】操作スイッチとサイドクラッチ機構の作用を示
すタイムチャートである。
【図５】操作スイッチの作動を示すフロチャートであ
る。
【符号の説明】
１ 作業車 ２ 操作
レバー
３ 運転部 １０ 制御
部（マイコン）
１１ 操作スイッチ
８２ アクチュエータ（油圧シリンダ）BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing an operating mechanism of a combine and its circuit. FIG. 2 is a plan view of an operation unit. FIG. 3 is a circuit diagram of an operation switch. FIG. 4 is a time chart showing the operation of an operation switch and a side clutch mechanism. FIG. 5 is a flowchart showing the operation of an operation switch. [Description of Signs] 1 work vehicle 2 operation lever 3 operation unit 10 control unit (microcomputer) 11 operation switch 82 actuator (hydraulic cylinder)
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−208204（ＪＰ，Ａ) 特開 昭64−23806（ＪＰ，Ａ) 特開 平３−90484（ＪＰ，Ａ) 実開 昭62−136136（ＪＰ，Ｕ) 実開 平１−59777（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B62D 11/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-208204 (JP, A) JP-A-64-23806 (JP, A) JP-A-3-90484 (JP, A) 136 136 (JP, U) Japanese Utility Model 1-59777 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) B62D 11/00
Claims (1)
レバー２を中立位置から両側に択一的に傾倒操作するこ
とにより、その第１段目の傾倒操作でサイドクラッチ機
構７，７ａのクラッチのみを切って操向旋回させるとと
もに、第２段目の傾倒操作によりブレーキを作動させて
信地旋回を行なうように構成した作業車の操向操作装置
において、 前記操作レバー２にサイドクラッチのみを切って操向旋
回を行なわせる操作スイッチ１１を設け、該操作スイッ
チ１１は制御部１０を介してサイドクラッチ機構７，７
ａの駆動装置８２，８２に連繋され、制御部１０は操作
スイッチ１１がＯＮ操作を継続されるとき、その操作初
期から所定時間ｔ1 は前記サイドクラッチ機構７，７ａ
の駆動装置８２をＯＮ動作し、該所定時間ｔ1 経過後は
設定時間ｔ2 だけＯＦＦ動作し、その後は操作スイッチ
１１のＯＮ操作時間までＯＮさせるように構成した走行
作業機の操向操作装置。(57) [Claims 1] An operation lever 2 installed in an operation unit 3 of a traveling work machine 1 is selectively tilted from both sides from a neutral position to both sides, so that the first stage thereof is A steering operation device for a working vehicle configured to disengage only the clutches of the side clutch mechanisms 7 and 7a in the tilting operation and turn the steering, and to operate the brake by the tilting operation in the second stage to perform a pivot turn. In the above, the operation lever 2 is provided with an operation switch 11 for disengaging only the side clutch to perform a steering turn, and the operation switch 11 is connected to the side clutch mechanisms 7, 7 via a control unit 10.
are interlocking to a driving device 82, the control unit 10 when the operation switch 11 is continued to ON operated, the operation from the initial predetermined time t 1 is the side clutch mechanism 7,7a
Of by ON operation of the driving device 82, after said predetermined constant-time t 1 elapses only OFF operation time setting t 2, then the running working machine steering operating device configured to be ON until ON operation time of the operation switch 11 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21756994A JP3493224B2 (en) | 1994-09-12 | 1994-09-12 | Steering operation device of traveling work machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21756994A JP3493224B2 (en) | 1994-09-12 | 1994-09-12 | Steering operation device of traveling work machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0880863A JPH0880863A (en) | 1996-03-26 |
| JP3493224B2 true JP3493224B2 (en) | 2004-02-03 |
Family
ID=16706329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21756994A Expired - Lifetime JP3493224B2 (en) | 1994-09-12 | 1994-09-12 | Steering operation device of traveling work machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3493224B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1149025A (en) * | 1997-08-01 | 1999-02-23 | Yanmar Agricult Equip Co Ltd | Steering control device in work machine |
-
1994
- 1994-09-12 JP JP21756994A patent/JP3493224B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0880863A (en) | 1996-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1319577B1 (en) | Drive-by-wire riding lawn mower | |
| US5337543A (en) | Lawn mower for use both as riding and walking operator type | |
| US4040306A (en) | Forward and reverse mechanism having a single direction | |
| US4373603A (en) | Automatic crab steering | |
| JP3493224B2 (en) | Steering operation device of traveling work machine | |
| JPH0422735B2 (en) | ||
| JP5115005B2 (en) | Combine gearing | |
| JP2731663B2 (en) | Agricultural work machine steering mechanism | |
| JP3097087B2 (en) | Mobile farm machine direction control device | |
| JPH0999848A (en) | Steering device for farm working machine | |
| JP3798601B2 (en) | Operation equipment for mobile agricultural machines | |
| JP7196955B1 (en) | combine | |
| JP3688148B2 (en) | Four-wheel drive agricultural tractor | |
| JPH0335627Y2 (en) | ||
| JP2002145026A (en) | Pedal supporting structure for work vehicle | |
| JPH0750897Y2 (en) | Combine | |
| JPH0547562Y2 (en) | ||
| JP2652385B2 (en) | Remote control work machine | |
| JP2588519Y2 (en) | Combine steering control | |
| JP2559285Y2 (en) | Steering operation device for mobile work vehicle | |
| JPH0534422Y2 (en) | ||
| JPH0130988Y2 (en) | ||
| GB2195748A (en) | Omni-directional controllers for hacked vehicles and the like | |
| JP2002068000A (en) | Turn controller for work vehicle | |
| JP3688196B2 (en) | Four-wheel drive agricultural tractor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071114 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081114 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081114 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091114 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101114 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101114 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111114 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111114 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121114 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121114 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131114 Year of fee payment: 10 |
|
| EXPY | Cancellation because of completion of term |