JP2547416Y2 - Tractor traveling device - Google Patents
Tractor traveling deviceInfo
- Publication number
- JP2547416Y2 JP2547416Y2 JP1990117545U JP11754590U JP2547416Y2 JP 2547416 Y2 JP2547416 Y2 JP 2547416Y2 JP 1990117545 U JP1990117545 U JP 1990117545U JP 11754590 U JP11754590 U JP 11754590U JP 2547416 Y2 JP2547416 Y2 JP 2547416Y2
- Authority
- JP
- Japan
- Prior art keywords
- front wheel
- wheels
- rotational load
- wheel
- lifting 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
- 230000008859 change Effects 0.000 claims description 14
- 230000003028 elevating effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Arrangement And Driving Of Transmission Devices (AREA)
- Vehicle Body Suspensions (AREA)
Description
【考案の詳細な説明】 「産業上の利用分野」 本考案は左右前後輪の４輪を駆動して機体の走行を行
うようにしたトラクタの走行装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a traveling device for a tractor that drives an airframe by driving four wheels, that is, left and right front and rear wheels.
「従来の技術」 従来、特開昭62−53209号公報に示す如く、前後輪車
軸に油圧シリンダを夫々配設させ、独立懸架の左右の前
輪及び後輪を夫々各別に昇降させる技術がある。2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. Sho 62-53209, there is a technique in which hydraulic cylinders are disposed on front and rear axles, respectively, and left and right front wheels and rear wheels of an independent suspension are individually raised and lowered.
「考案が解決しようとする課題」 前記従来技術は、前記各油圧シリンダにアキュムレー
タを連結させ、前後輪の接地力を確保していたから、姿
勢制御と接地力確保の両方を行えるが、前記各油圧シリ
ンダを作動させる油圧回路、並びに該油圧回路を制御す
る電気回路の簡略化及び製造コスト低減などを容易に行
い得ないと共に、トラクタ後側に耕耘作業機を装備して
行う耕耘作業時、湿田と乾田または畑、或いは粘土質と
砂質など圃場条件により、後輪の転動反力によってトラ
クタ前部が上昇するヘッドアップ姿勢に差が生じるが、
前記圃場条件に関係なくアキュムレータによる油圧シリ
ンダ制御が行われるから、前記ヘッドアップ姿勢に対し
て前輪の接地力が確保されても、圃場条件によって前輪
の回転負荷（走行力）が変化し易く、前輪の横滑り防止
またはスリップ防止などを容易に図り得ない等の問題が
ある。[Problem to be Solved by the Invention] In the related art, an accumulator is connected to each of the hydraulic cylinders to secure the grounding force of the front and rear wheels. Therefore, both the attitude control and the grounding force can be performed. Simplification of the hydraulic circuit for operating the hydraulic circuit and the electric circuit for controlling the hydraulic circuit and the reduction of the manufacturing cost cannot be easily performed. Or, depending on field conditions, such as fields, or clay and sand, a difference occurs in the head-up posture in which the front of the tractor rises due to the rolling reaction force of the rear wheel,
Since the hydraulic cylinder control by the accumulator is performed irrespective of the field condition, the rotational load (running force) of the front wheel tends to change depending on the field condition even if the ground contact force of the front wheel is ensured for the head-up posture. There is a problem that prevention of side slip or slip cannot be easily achieved.
「課題を解決するための手段」 然るに、本考案は、機体後方に対地作業機を装備して
左右の前輪及び後輪の４輪を駆動して走行すると共に、
左右前輪を本機に昇降自在に支持させる前輪昇降シリン
ダと、左右後輪を本機に昇降自在に支持させる後輪昇降
シリンダを設けるトラクタの走行装置において、前輪の
回転負荷変化を検出する前輪回転負荷センサと、前輪回
転負荷基準置を設定する前輪回転負荷設定器を設け、前
輪回転負荷センサの検出結果に基づき前輪昇降シリンダ
制御を優先して前輪昇降シリンダ及び後輪昇降シリンダ
を自動制御するように構成したことを特徴とする。"Means for solving the problem" However, the present invention is equipped with a ground work machine at the rear of the aircraft and drives by driving four wheels of the left and right front wheels and the rear wheels,
Front wheel rotation detecting front wheel rotation load change in a tractor traveling device that has a front wheel lifting cylinder that supports the left and right front wheels to be able to move up and down and a rear wheel lifting cylinder that supports the left and right rear wheels so that it can be moved up and down. A load sensor and a front wheel rotation load setting device for setting a front wheel rotation load reference position are provided, and the front wheel lifting cylinder and the rear wheel lifting cylinder are automatically controlled by giving priority to the front wheel lifting cylinder control based on the detection result of the front wheel rotation load sensor. It is characterized by having comprised in.
「作用」 従って、圃場条件または対地作業機の牽引荷重（重量
または牽引抵抗）などに対処し、前輪回転負荷設定器操
作によって前輪回転負荷基準値を切換えることにより、
圃場条件などに適応した前輪の回転負荷を設定し得、ま
た前記昇降シリンダ自動制御によって前輪の回転負荷を
前記基準値に保つから、前輪の横滑り防止並びにスリッ
プ防止などを容易に行い得、トラクタのヘッドアップ姿
勢が大きく変化し易い湿田での耕耘作業などにおいても
前輪の走行抵抗変化を容易に低減し得、４輪駆動による
湿田での対地作業走行性能維持を容易に図り得ると共
に、前輪回転負荷センサの検出結果に基づき前輪昇降シ
リンダ自動制御を行い、前輪制御が限度になったときに
後輪昇降シリンダ自動制御を行わせるから、前記昇降シ
リンダ自動制御構造の簡略化並びに製造コスト低減など
を従来よりも容易に行い得、また組立または保守作業時
の調整など取扱い操作性の向上を容易に図り得るもので
ある。"Action" Therefore, by coping with the field conditions or the traction load (weight or traction resistance) of the ground work machine, by switching the front wheel rotation load reference value by operating the front wheel rotation load setting device,
Since the rotational load of the front wheels can be set according to field conditions, etc., and the rotational load of the front wheels is kept at the reference value by the automatic control of the lifting / lowering cylinder, the front wheels can be easily prevented from skidding and slipping, and the tractor can be easily controlled. Even in tilling work in wet fields where the head-up attitude is likely to change significantly, it is possible to easily reduce the change in running resistance of the front wheels, easily maintain ground running performance in wet fields by four-wheel drive, and to achieve front wheel rotation load. The front wheel lifting cylinder automatic control is performed based on the detection result of the sensor, and when the front wheel control reaches the limit, the rear wheel lifting cylinder automatic control is performed. It can be more easily performed, and handling operability such as adjustment during assembly or maintenance work can be easily improved.
「実施例」 以下、本考案の一実施例を図面に基づいて詳述する。
第１図は要部の側面説明図、第２図は全体の側面図であ
り、トラクタ（１）の後部にロータリ耕耘作業機（２）
を装備するもので、機体の前後部に走行用前後輪（３）
（４）を配設すると共に、運転席（５）及び操向ハンド
ル（６）を備え、機体後部にトップリンク（７）及びロ
ワリンク（８）で形成する三点リンク機構（９）を介し
て耕耘ロータリ（10）を有する前記作業機（２）を昇降
自在に連結させている。Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory side view of a main part, and FIG. 2 is a side view of the whole. A rotary tilling machine (2) is provided at a rear portion of a tractor (1).
Equipped with front and rear running wheels (3)
(4) is provided, a driver's seat (5) and a steering handle (6) are provided, and a three-point link mechanism (9) formed by a top link (7) and a lower link (8) at the rear of the fuselage. The work machine (2) having the tilling rotary (10) is connected to be able to move up and down freely.
第３図乃至第４図にも示す如く、前後輪（３）（４）
のアクスル部であるフロントアクスル（11）及びリヤア
クスル（12）を、上下動自在に機体に支持させるもの
で、機体側の前後ベースフレーム（13）（14）に固設す
る前後各１対のガイド板（15）（15）・（16）（16）
に、前記フロント及びリヤアクスル（11）（12）の中央
デフケース（17）（18）を各上下ガイド軸（19）（20）
及びガイド長孔（21）（21）・（22）（22）を介して上
下動自在に支持する一方、前記フレーム（13）（14）に
ブラケット（23）（24）を介し固設する枢軸（25）（2
6）と前記ガイド軸（19）（20）間に前後各１対の油圧
式前輪及び後輪昇降シリンダ（27）（27）・（28）（2
8）を介設して、これら各シリンダ（27）（27）・（2
8）（28）の適宜伸縮運動でもって左右前輪（３）
（３）及び後輪（４）（４）の上下支持高さの調節を行
うように構成している。As shown in FIGS. 3 and 4, the front and rear wheels (3) and (4)
The front axle (11) and the rear axle (12), which are the axle parts, are supported by the body so as to be able to move up and down, and a pair of front and rear guides are fixed to the front and rear base frames (13) and (14) on the body side. Board (15) (15) ・ (16) (16)
Then, the center differential case (17) (18) of the front and rear axles (11) (12) is connected to the upper and lower guide shafts (19) (20).
And a pivot that is fixedly mounted on the frames (13) and (14) via brackets (23) and (24) while being vertically supported via the guide slots (21) (21), (22) and (22). (25) (2
6) and a pair of front and rear hydraulic front and rear wheel lifting cylinders (27) (27), (28) (2) between the guide shafts (19) and (20).
8) with these cylinders (27), (27), (2
8) Right and left front wheels (3) with appropriate stretching movement of (28)
The upper and lower support heights of the rear wheel (4) and the rear wheel (4) are adjusted.
また、機体の前端部にヘッドアップ防止用の重り（2
9）を前後移動自在に設けるもので、機体前端のベース
台（30）にガイド軸（31）及び送りネジ軸（32）を介し
て前記重り（29）を支持させ、前記ネジ軸（32）を重り
位置制御モータ（33）で正逆回転させることによって、
重り（29）位置を前後に移動調節するように構成してい
る。Also, add a weight (2
The weight (29) is supported on a base table (30) at the front end of the machine via a guide shaft (31) and a feed screw shaft (32), and the screw shaft (32) Is rotated forward and backward by the weight position control motor (33),
The weight (29) is configured to be moved back and forth.
第５図に示す如く、前輪（３）の回転負荷の変化を検
出する前輪回転負荷センサ（34）を前記フロントアクス
ル（11）に備えると共に、この回転負荷の基準値を設定
する前輪回転負荷設定器（35）を備え、前記モータ（3
3）及び昇降シリンダ（27）（28）の電磁操作式切換弁
及び警報装置（36）を動作させる制御回路（37）に、前
記センサ（34）及び設定器（35）を入力接続させて、前
記センサ（34）で検出される前輪（３）の接地荷重の変
更に伴う回転負荷の変化でもってこれらモータ（33）及
びシリンダ（27）（28）及び警報装置（36）の作動制御
を行うように構成している。上記から明らかなように、
機体後方に対地作業機であるロータリ耕耘作業機（２）
を装備して左右の前輪（３）（３）及び後輪（４）
（４）の４輪を駆動して走行すると共に、左右前輪
（３）（３）を本機に昇降自在に支持させる前輪昇降シ
リンダ（27）と、左右後輪を本機に昇降自在に支持させ
る後輪昇降シリンダ（28）を設けるトラクタの走行装置
において、前輪（３）の回転負荷変化を検出する前輪回
転負荷センサ（34）と、前輪（３）回転負荷基準置を設
定する前輪回転負荷設定器（35）を設け、前輪回転負荷
センサ（34）の検出結果に基づき前輪昇降シリンダ（2
7）制御を優先して前輪昇降シリンダ（27）及び後輪昇
降シリンダ（28）を自動制御する。そして圃場条件また
は対地作業機（２）の牽引荷重（重量または牽引抵抗）
などに対処し、前輪回転負荷設定器（35）操作によって
前輪（３）回転負荷基準値を切換え、圃場条件などに適
応した前輪（３）の回転負荷を設定し、また前記昇降シ
リンダ（27）（28）自動制御によって前輪（３）の回転
負荷を前記基準値に保ち、前輪（３）の横滑り防止並び
にスリップ防止などを行い、トラクタ（１）のヘッドア
ップ姿勢が大きく変化し易い湿田での耕耘作業などにお
いても前輪（３）の走行抵抗変化を低減させ、４輪駆動
による湿田での対地作業走行性能維持を図ると共に、前
輪回転負荷センサ（34）の検出結果に基づき前輪昇降シ
リンダ（27）自動制御を行い、前輪（３）制御が限度に
なったときに後輪昇降シリンダ（28）自動制御を行わ
せ、前記昇降シリンダ（27）（28）自動制御構造の簡略
化並びに製造コスト低減などを行え、また組立または保
守作業時の調整など取扱い操作性の向上を図れるように
構成している。As shown in FIG. 5, a front wheel axle (11) is provided with a front wheel rotational load sensor (34) for detecting a change in the rotational load of the front wheel (3), and a front wheel rotational load setting for setting a reference value of the rotational load. Device (35) and the motor (3
3) The sensor (34) and the setting device (35) are connected to the control circuit (37) for operating the electromagnetically operated switching valve and the alarm device (36) of the lifting cylinder (27) (28), The operation control of these motors (33), cylinders (27) and (28), and an alarm device (36) is performed based on a change in the rotational load accompanying a change in the ground load of the front wheel (3) detected by the sensor (34). It is configured as follows. As is clear from the above,
Rotary tilling work machine which is a ground work machine behind the fuselage (2)
Equipped with left and right front wheels (3) (3) and rear wheels (4)
A front wheel lifting cylinder (27) for driving the four wheels of (4) while driving the left and right front wheels (3) and (3) so as to be able to move up and down, and supporting the left and right rear wheels so as to be able to move up and down. In a traveling device of a tractor provided with a rear wheel lifting cylinder (28) to be driven, a front wheel rotational load sensor (34) for detecting a change in rotational load of the front wheel (3) and a front wheel rotational load for setting a front wheel (3) rotational load reference position. A setting device (35) is provided, and the front wheel lifting cylinder (2
7) The front wheel lifting cylinder (27) and the rear wheel lifting cylinder (28) are automatically controlled with priority given to control. And the field condition or the traction load (weight or traction resistance) of the ground work machine (2)
In response to the above, the front wheel (3) rotation load reference value is switched by operating the front wheel rotation load setting device (35), the rotation load of the front wheel (3) is set according to field conditions, etc., and the lifting cylinder (27) (28) The rotation load of the front wheel (3) is kept at the reference value by automatic control, side slip prevention and slip prevention of the front wheel (3) are performed, and the head-up posture of the tractor (1) is greatly changed in wet fields where the head-up attitude is likely to change greatly. In tilling work, etc., the change in running resistance of the front wheel (3) is reduced to maintain the ground running performance in wet fields by four-wheel drive, and the front wheel lifting cylinder (27) is used based on the detection result of the front wheel rotational load sensor (34). ) Automatic control is performed, and when the front wheel (3) control reaches the limit, the rear wheel lifting cylinder (28) automatic control is performed to simplify the above-mentioned lifting cylinder (27) (28) automatic control structure and reduce manufacturing cost. What It is designed to improve handling operability such as adjustment during assembly or maintenance work.
本実施例は上記の如く構成するものにして、以下第６
図のフローチャートを参照しこの作用を説明する。This embodiment is configured as described above.
This operation will be described with reference to the flowchart of FIG.
湿田での走行作業中、後輪（４）の発揮トルクが大き
く機体がヘッドアップし、前輪（３）が接地面より浮き
上がり状態となってこの接地荷重が低下し、前輪（３）
の回転負荷が小となるとき、前記センサ（34）がこれを
検出して、前記重り（29）を前方側に移動制御して機体
重心を前方側に移動させることによって前輪（３）での
接地荷重つまり回転負荷の増大を図る。During traveling work in a wet field, the torque exerted by the rear wheel (4) is large, and the fuselage heads up, and the front wheel (3) rises above the ground contact surface, and this ground contact load decreases, and the front wheel (3)
When the rotation load of the vehicle becomes small, the sensor (34) detects this, and controls the movement of the weight (29) to the front side to move the machine center of gravity to the front side, so that the weight at the front wheel (3) is reduced. Increase the contact load, that is, the rotation load.
そして、重り（29）が最前端位置に制御されたにもか
かわらず回転負荷が設定の一定値より以下のとき、前記
シリンダ（27）を伸張動作させて前輪（３）を下降制御
するもので、また前輪（３）を最下限まで下降制御した
にもかかわらず、回転負荷が一定以下のとき前記シリン
ダ（28）を収縮動作させて後輪（３）を上昇制御し、さ
らに後輪（３）を最上限まで上昇制御したにもかかわら
ず回転負荷が一定以下のとき警報装置（37）を作動して
これを作業者に報知する。When the weight (29) is controlled to the front end position and the rotational load is less than a predetermined value, the cylinder (27) is extended to lower the front wheel (3). In addition, despite the fact that the front wheel (3) is controlled to lower to the lowermost limit, when the rotational load is below a certain level, the cylinder (28) is contracted to control the rear wheel (3) to rise, and the rear wheel (3) is further controlled. ), The alarm device (37) is activated to notify the operator when the rotational load is below a certain level even though the upper limit is controlled to the upper limit.
なお、前述実施例にあっては前輪（３）及び後輪
（４）の昇降制御を一連で行う構成を示したが、単独で
行う構成でも良く、またシリンダ（27）（28）の配置も
斜めなど他の部品を干渉しない何れの姿勢でも良い。In the above-described embodiment, the configuration in which the elevation control of the front wheel (3) and the rear wheel (4) is performed in a series is shown. However, the configuration may be performed independently, and the arrangement of the cylinders (27) and (28) may be changed. Any posture that does not interfere with other components, such as oblique, may be used.
第７図は前述の前輪（３）及び後輪（４）の昇降制御
に加え、三点リンク機構（９）の昇降用油圧シリンダ
（38）に複動式を用いると共に、ヘッドアップ防止用の
尾ソリ（39）を作業機（２）後部に装備させた構成例を
示すもので、前記ロワリンク（８）にリフトロッド（4
0）及びリフトアーム（41）を介して油圧シリンダ（3
8）を連結させる一方、前記ロータリ（10）のロータリ
カバー（42）後端に各揺動支点軸（43）（44）を介し均
平用リヤカバー（45）及び尾ソリ（39）を支持し、該尾
ソリ（39）をデプスフレーム（46）を介してトップリン
ク（７）を形成する油圧シリンダ（47）に連結支持させ
て、機体がヘッドアップするとき前記シリンダ（47）の
伸張動作でもって尾ソリ（39）の接地部を下降させてこ
の接地荷重を大とさせることによってヘッドアップの防
止を図るように構成したものである。なお、前記尾ソリ
（39）の設置にあっては、リヤカバー（45）の中央を切
欠いた位置に臨ませるなど何れの位置でも良い。またこ
のような尾ソリ（39）の接地荷重を大とさせる場合、前
記シリンダ（38）を複動式とすることによってロータリ
（10）本体側の上方向への回避が防止されて、この尾ソ
リ（39）によるヘッドアップ防止を可能なものにでき
る。FIG. 7 shows a double-acting type hydraulic cylinder (38) for raising and lowering the three-point link mechanism (9) in addition to the above-mentioned lifting and lowering control of the front wheel (3) and the rear wheel (4). This shows an example of a configuration in which a tail sled (39) is provided at the rear of the work machine (2). A lift rod (4) is attached to the lower link (8).
0) and the hydraulic cylinder (3
8), the leveling rear cover (45) and the tail sled (39) are supported at the rear end of the rotary cover (42) of the rotary (10) via the respective swing fulcrum shafts (43) (44). The tail sled (39) is connected and supported via a depth frame (46) to a hydraulic cylinder (47) forming a top link (7). Thus, the head-up is prevented by lowering the contact portion of the tail sled (39) to increase the contact load. The tail sled (39) may be installed at any position such that the center of the rear cover (45) faces a cutout position. When the ground load of the tail sled (39) is increased, the cylinder (38) is double-acting to prevent the rotary (10) main body from escaping upward. The head-up prevention by the sled (39) can be made possible.
このようにトラクタ（１）機体の後方に作業機（２）
を装備させたものにあっては、作業機（２）の自重をリ
フトアーム（41）で吊り下げる状態に支持しているた
め、後輪（４）側の発揮トルクが必然的に大となって機
体はヘッドアップ傾向となるもので、このような場合に
尾ソリ（39）を用いることによってヘッドアップを一層
効果的に防止することができる。In this way, the work implement (2) is located behind the tractor (1)
Since the work machine (2) is supported with its own weight suspended by the lift arm (41), the torque exerted on the rear wheel (4) side is inevitably large. In such a case, the head body can be more effectively prevented by using the tail sled (39) in such a case.
「考案の効果」 以上実施例から明らかなように本考案は、機体後方に
対地作業機（２）を装備して左右の前輪（３）（３）及
び後輪（４）（４）の４輪を駆動して走行すると共に、
左右前輪（３）（３）を本機に昇降自在に支持させる前
輪昇降シリンダ（27）と、左右後輪を本機に昇降自在に
支持させる後輪昇降シリンダ（28）を設けるトラクタの
走行装置において、前輪（３）の回転負荷変化を検出す
る前輪回転負荷センサ（34）と、前輪（３）回転負荷基
準置を設定する前輪回転負荷設定器（35）を設け、前輪
回転負荷センサ（34）の検出結果に基づき前輪昇降シリ
ンダ（27）制御を優先して前輪昇降シリンダ（27）及び
後輪昇降シリンダ（28）を自動制御するように構成した
もので、圃場条件または対地作業機（２）の牽引荷重
（重量または牽引抵抗）などに対処し、前輪回転負荷設
定器（35）操作によって前輪（３）回転負荷基準値を切
換えることにより、圃場条件などに適応した前輪（３）
の回転負荷を設定でき、また前記昇降シリンダ（27）
（28）自動制御によって前輪（３）の回転負荷を前記基
準値に保つから、前輪（３）の横滑り防止並びにスリッ
プ防止などを容易に行うことができ、トラクタ（１）の
ヘッドアップ姿勢が大きく変化し易い湿田での耕耘作業
などにおいても前輪（３）の走行抵抗変化を容易に低減
でき、４輪駆動による湿田での対地作業走行性能維持を
容易に図ることができると共に、前輪回転負荷センサ
（34）の検出結果に基づき前輪昇降シリンダ（27）自動
制御を行い、前輪（３）制御が限度になったときに後輪
昇降シリンダ（28）自動制御を行わせるから、前記昇降
シリンダ（27）（28）自動制御構造の簡略化並びに製造
コスト低減などを従来よりも容易に行うことができ、ま
た組立または保守作業時の調整など取扱い操作性の向上
を容易に図ることができるものである。[Effects of the Invention] As is clear from the above embodiment, the present invention is equipped with a ground work machine (2) at the rear of the body and has four front wheels (3) and (3) and four rear wheels (4) and (4). While driving by driving the wheels,
A traveling device for a tractor provided with a front wheel elevating cylinder (27) for supporting the left and right front wheels (3) and (3) so as to be able to move up and down, and a rear wheel elevating cylinder (28) for supporting the left and right rear wheels so as to be able to move up and down. , A front wheel rotational load sensor (34) for detecting a change in the rotational load of the front wheel (3) and a front wheel rotational load setter (35) for setting the front wheel (3) rotational load reference position are provided. ), The front wheel elevating cylinder (27) and the rear wheel elevating cylinder (28) are automatically controlled with priority given to the front wheel elevating cylinder (27) control. ), The front wheel (3) is adapted to the field conditions by switching the front wheel (3) rotation load reference value by operating the front wheel rotation load setting device (35).
Rotation load can be set, and the lifting cylinder (27)
(28) Since the rotational load of the front wheel (3) is kept at the reference value by the automatic control, it is possible to easily prevent the front wheel (3) from skidding and slipping, and the head-up posture of the tractor (1) is large. The front wheel (3) can easily reduce the running resistance change even in the tilling work in the wet field where it is easy to change, and can easily maintain the running performance on the ground in the wet field by the four-wheel drive, and the front wheel rotation load sensor. Based on the detection result of (34), the front wheel lifting cylinder (27) is automatically controlled, and when the front wheel (3) control reaches the limit, the rear wheel lifting cylinder (28) is automatically controlled. (28) The automatic control structure can be simplified and manufacturing costs can be reduced more easily than before, and handling operability such as adjustment during assembly or maintenance work can be easily improved. It is intended.
第１図は要部の側面説明図、第２図は全体の側面図、第
３図は前輪部の正面説明図、第４図は後輪部の正面説明
図、第５図は制御回路図、第６図はフローチャート、第
７図は尾ソリの装着状態を示す説明図である。 （３）…前輪 （４）…後輪 （11）…フロントアクスル（アクスル部） （12）…リヤアクスル（アクスル部）1 is an explanatory side view of a main part, FIG. 2 is an overall side view, FIG. 3 is an explanatory front view of a front wheel portion, FIG. 4 is an explanatory front view of a rear wheel portion, and FIG. 5 is a control circuit diagram. , FIG. 6 is a flowchart, and FIG. 7 is an explanatory view showing a mounted state of the tail sled. (3) Front wheel (4) Rear wheel (11) Front axle (axle part) (12) Rear axle (axle part)
Claims (1)
右の前輪（３）（３）及び後輪（４）（４）の４輪を駆
動して走行すると共に、左右前輪（３）（３）を本機に
昇降自在に支持させる前輪昇降シリンダ（27）と、左右
後輪を本機に昇降自在に支持させる後輪昇降シリンダ
（28）を設けるトラクタの走行装置において、前輪
（３）の回転負荷変化を検出する前輪回転負荷センサ
（34）と、前輪（３）回転負荷基準置を設定する前輪回
転負荷設定器（35）を設け、前輪回転負荷センサ（34）
の検出結果に基づき前輪昇降シリンダ（27）制御を優先
して前輪昇降シリンダ（27）及び後輪昇降シリンダ（2
8）を自動制御するように構成したことを特徴とするト
ラクタの走行装置。A ground work machine (2) is provided at the rear of the machine to drive and drive four front wheels (3, 3) and rear wheels (4), (4). 3) In a tractor traveling device, a front wheel elevating cylinder (27) for supporting (3) on the machine so as to be able to move up and down, and a rear wheel elevating cylinder (28) for supporting left and right rear wheels so as to be able to move up and down. A front wheel rotational load sensor (34) for detecting a change in rotational load of (3) and a front wheel rotational load setter (35) for setting a front wheel (3) rotational load reference position are provided.
Priority is given to the front wheel lifting cylinder (27) control based on the detection result of the front wheel lifting cylinder (27) and the rear wheel lifting cylinder (2
8) A traveling device for a tractor, wherein the traveling device is configured to automatically control the tractor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990117545U JP2547416Y2 (en) | 1990-11-07 | 1990-11-07 | Tractor traveling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990117545U JP2547416Y2 (en) | 1990-11-07 | 1990-11-07 | Tractor traveling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0474106U JPH0474106U (en) | 1992-06-29 |
| JP2547416Y2 true JP2547416Y2 (en) | 1997-09-10 |
Family
ID=31865445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990117545U Expired - Lifetime JP2547416Y2 (en) | 1990-11-07 | 1990-11-07 | Tractor traveling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2547416Y2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012121434A (en) * | 2010-12-08 | 2012-06-28 | Matsumoto System Engineering Kk | Wheel type delivery vehicle |
| JP2014158424A (en) * | 2013-02-19 | 2014-09-04 | National Agriculture & Food Research Organization | Wheel lifting device for agricultural vehicle |
| JP6899802B2 (en) * | 2018-06-27 | 2021-07-07 | 株式会社クボタ | Passenger work vehicle |
| EP3816018A4 (en) * | 2018-06-27 | 2022-07-20 | Kubota Corporation | Ridden work vehicle |
| JP6991105B2 (en) * | 2018-06-27 | 2022-01-12 | 株式会社クボタ | Passenger work vehicle |
| JP2022104740A (en) * | 2020-12-29 | 2022-07-11 | 株式会社クボタ | Work vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6253209A (en) * | 1985-08-30 | 1987-03-07 | Kayaba Ind Co Ltd | Attitude controller for multiaxle vehicle |
-
1990
- 1990-11-07 JP JP1990117545U patent/JP2547416Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0474106U (en) | 1992-06-29 |
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