JP2946521B2 - Tractor traveling device - Google Patents
Tractor traveling deviceInfo
- Publication number
- JP2946521B2 JP2946521B2 JP6670589A JP6670589A JP2946521B2 JP 2946521 B2 JP2946521 B2 JP 2946521B2 JP 6670589 A JP6670589 A JP 6670589A JP 6670589 A JP6670589 A JP 6670589A JP 2946521 B2 JP2946521 B2 JP 2946521B2
- Authority
- JP
- Japan
- Prior art keywords
- wheel drive
- wheel
- working
- vehicle
- tractor
- 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 - Fee Related
Links
Landscapes
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、トラクタの走行装置に関する。Description: TECHNICAL FIELD The present invention relates to a traveling device for a tractor.
従来の技術、および［発明が解決しようとする課題 従来、特公昭59−34529号公報や特開昭55−140616号
公報に示されるように、耕耘作業装置の上昇時にエンジ
ンから前車輪への動力伝達を電気的に切りとして四輪駆
動走行から後車輪による二輪駆動走行に切換えるトラク
タがあった。2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Publication No. Sho 59-34529 and Japanese Patent Laid-Open Publication No. Sho 55-140616, the power from the engine to the front wheels when the tilling work device is raised is known. There has been a tractor that switches transmission from four-wheel drive to two-wheel drive with rear wheels by electrically turning off transmission.
このようなトラクタは、旋回時に内輪差による前車輪
のブレーキを無くして小回り旋回を容易にするものであ
る。Such a tractor eliminates a brake on the front wheels due to an inner wheel difference during a turn and facilitates a small turn.
しかしながら、これらトラクタが作業を行う圃場は軟
弱な個所が点在し、例えば圃場端で作業装置を非作業状
態、即ち上昇して旋回するときにスリップを生じその都
度車両を四輪駆動走行に切り替える必要があり、車両の
操作性が悪いという課題が有った。However, the fields where these tractors work are dotted with weak points, for example, when the working device is in a non-working state at the edge of the field, that is, a slip occurs when turning up and turning, and the vehicle is switched to four-wheel drive each time. Therefore, there is a problem that the operability of the vehicle is poor.
課題を解決するための手段 この発明は、上記課題を鑑みてトラクタの走行装置を
以下のように構成した。即ち、耕耘作業装置（４）を昇
降自在に装着すると共に、エンジン（７）から前車輪
（１）への動力伝達を電気的に入切して車両を四輪駆動
走行と後車輪（２）による二輪駆動走行とに切換え可能
に構成したトラクタにおいて、この車両に前記作業装置
（４）の作業状態、若しくは非作業状態を検出するセン
サ（24）と、スリップ状態を検出するセンサ（29）（3
0）とを設け、前者のセンサ（24）により前記作業装置
（４）が非作業状態を検出しているときには、スリップ
状態に応じて前記四輪駆動走行と二輪駆動走行を適宜切
換え、同センサ（24）により前記作業装置（４）が作業
状態を検出しているときには前記切換えを牽制して常時
四輪駆動走行を維持するように構成した。Means for Solving the Problems In view of the above problems, the present invention has configured a traveling device for a tractor as follows. That is, the tilling work device (4) is mounted so as to be able to move up and down, and the power transmission from the engine (7) to the front wheels (1) is electrically turned on and off to drive the vehicle four-wheel drive and the rear wheels (2). And a sensor (24) for detecting a working state or a non-working state of the working device (4) and a sensor (29) (29) for detecting a slipping state of the working device (4) in the vehicle. Three
0), and when the working device (4) detects the non-working state by the former sensor (24), the four-wheel drive running and the two-wheel drive running are appropriately switched in accordance with the slip state, and the sensor is used. According to (24), when the working device (4) is detecting the working state, the switching is suppressed and the four-wheel drive traveling is always maintained.
発明の作用、および効果 耕耘装置（４）を着地して直進作業を行っているとき
には、トラクタは常時四輪駆動で走行するため牽引力が
確保される。また、車体が畦際や枕地部分にきて作業装
置（４）を非作業状態にすると、車両のスリップ状態を
検出し、これに応じて前記四輪駆動走行と二輪駆動走行
を適宜切換える。このため、前述のように通常時の走
行、特に旋回では前車輪（１）によるブレーキを無くし
旋回を円滑にするとともに、軟弱な個所でスリップ状態
に陥ったときには自動で回避し、車両の操作性を向上す
ることができる。Effects and Effects of the Invention When the cultivator (4) lands and performs a straight-ahead operation, the tractor always travels with four-wheel drive, so that traction is secured. Further, when the working device (4) is brought into a non-working state when the vehicle body comes to a ridge or a headland, a slip state of the vehicle is detected, and the four-wheel drive running and the two-wheel drive running are appropriately switched accordingly. For this reason, as described above, the brakes by the front wheel (1) are eliminated during normal running, particularly turning, so that turning is smooth, and when the vehicle slips at a weak point, it is automatically avoided, and the operability of the vehicle is reduced. Can be improved.
実施例 なお、図例において、車体（３）の前部には、操向ハ
ンドル（６）によって操向自在の前車輪（１）、及びエ
ンジン（７）を設け、後部には後車輪（２）を設けて、
エンジン（７）からの伝動によって、主クラッチ、変速
伝動軸（８）等を介し、前車輪（１）へは、伝動軸
（９）、前車輪クラッチ（５）、伝動時（10）、差動伝
動装置（11）、左右の前車軸（12）等を経て伝動し、該
前車輪クラッチ（５）を切りにすることにより、前車輪
（１）への伝動を断つことができる。又、後車輪（２）
へは、該伝動軸（９）から、差動伝動装置（13）、及び
左右の後車軸（14）等を経て伝動構成し、四輪駆動形態
としている。（15）は操縦席、（16）はトランスミッシ
ョンケース、（17）は油圧装置によって昇降するリフト
アーム、（18）は車体（３）の後端部に設ける左右一対
のロアリンク、（19）はトップリンクで、耕耘装置から
なる作業装置（４）をこれらロアリンク（18）とトップ
リンク（19）の後端に連結する。（20）は耕耘爪、（2
1）は耕耘カバーである。（22）は該リフトアーム（1
7）とロアリンク（18）との間を連結するリンクで、リ
フトアーム（17）の上下回動によってロアリンク（18）
を車体（３）に対して昇降することにより作業装置
（４）を昇降する。Embodiment In the example shown in the drawings, a front wheel (1) steerable by a steering handle (6) and an engine (7) are provided at a front portion of a vehicle body (3), and a rear wheel (2) is provided at a rear portion. )
By the transmission from the engine (7), the transmission shaft (9), the front wheel clutch (5), the transmission time (10), and the difference are transmitted to the front wheel (1) via the main clutch, the transmission transmission shaft (8) and the like. The transmission to the front wheel (1) can be cut off by transmitting the power via the dynamic transmission (11), the left and right front axles (12) and the like and disengaging the front wheel clutch (5). Also, rear wheel (2)
The transmission is constituted by a transmission from the transmission shaft (9) via a differential transmission (13), left and right rear axles (14), and the like, to form a four-wheel drive. (15) is a cockpit, (16) is a transmission case, (17) is a lift arm that moves up and down by a hydraulic device, (18) is a pair of left and right lower links provided at the rear end of the vehicle body (3), and (19) is With the top link, the working device (4) composed of a tilling device is connected to the lower link (18) and the rear end of the top link (19). (20) is the tilling nail, (2
1) is a tillage cover. (22) is the lift arm (1
A link that connects the lower link (18) with the lower link (18).
Is raised and lowered with respect to the vehicle body (3) to raise and lower the working device (4).
操縦席（15）の一側には、リフトアーム（17）を油圧
差動するためのリフトレバー（23）を設け、このリフト
レバー（23）を上昇位置（イ）へ回動してリフトアーム
（17）を上昇回動、即ち前記作業装置（４）を非作業状
態とするとき、センサー（24）で検出してスイッチ（2
5）をONし、油圧回路（26）のクラッチバルブ（27）を
切換えて前車輪クラッチ（５）を切りにする構成として
いる。これにより、トラクタは四輪駆動形態から後車輪
（２）による二輪駆動形態に切換わる。（28）は手動に
よるON、OFFスイッチである。又、このスイッチ回路に
は、後車輪（２）のスリップを検出して、該クラッチバ
ルブ（27）を切換えて前車輪クラッチ（５）を入りにし
て四輪駆動形態とするように、前車輪クラッチ（５）の
前後の各伝動軸（９）（10）の回転数を検出する回転セ
ンサー（29）（30）、及びこれらの回転を比較する比較
器（31）等を設ける。この比較器（31）で前車輪（１）
側の伝動軸（10）の回転よりも後車輪（２）側と連動し
ている伝動軸（９）が高回転数になったとき、前車輪ク
ラッチ（５）を切位置から入位置へ切換制御する。これ
によって旋回時に後車輪（２）がスリップすると前車輪
（１）をも同時に駆動して円滑な旋回を行わせる。（3
2）は油圧ポンプである。On one side of the cockpit (15), a lift lever (23) for hydraulically differentially moving the lift arm (17) is provided, and the lift lever (23) is turned to the raised position (A) to lift the lift arm. When (17) is rotated upward, that is, when the working device (4) is set to the non-working state, the switch (2) is detected by the sensor (24).
5) is turned ON, and the clutch valve (27) of the hydraulic circuit (26) is switched to disengage the front wheel clutch (5). As a result, the tractor switches from the four-wheel drive mode to the two-wheel drive mode using the rear wheels (2). (28) is a manual ON / OFF switch. The switch circuit detects the slip of the rear wheel (2) and switches the clutch valve (27) to engage the front wheel clutch (5) so that the front wheel is in a four-wheel drive mode. A rotation sensor (29) (30) for detecting the number of rotations of each transmission shaft (9) (10) before and after the clutch (5), and a comparator (31) for comparing these rotations are provided. Front wheel (1) with this comparator (31)
The front wheel clutch (5) is switched from the disengaged position to the engaged position when the speed of the transmission shaft (9), which is interlocked with the rear wheel (2) side, becomes higher than the rotation of the transmission shaft (10) on the side. Control. As a result, when the rear wheel (2) slips during turning, the front wheel (1) is simultaneously driven to perform a smooth turning. (3
2) is a hydraulic pump.
図はこの発明の一実施例を示すもので、第１図は側面
図、第２図は伝動機構の平面図、第３図は回路図を示
す。 図中、符号（１）は前車輪、（２）は後車輪、（３）は
車体、（４）は作業装置、（５）は前車輪クラッチを示
す。1 is a side view, FIG. 2 is a plan view of a transmission mechanism, and FIG. 3 is a circuit diagram. In the drawing, reference numeral (1) indicates a front wheel, (2) indicates a rear wheel, (3) indicates a vehicle body, (4) indicates a working device, and (5) indicates a front wheel clutch.
Claims (1)
と共に、エンジン（７）から前車輪（１）への動力伝達
を電気的に入切して車両を四輪駆動走行と後車輪（２）
による二輪駆動走行とに切換え可能に構成したトラクタ
において、この車両に前記作業装置（４）の作業状態、
若しくは非作業状態を検出するセンサ（24）と、スリッ
プ状態を検出するセンサ（29）（30）とを設け、前者の
センサ（24）により前記作業装置（４）が非作業状態を
検出しているときには、スリップ状態に応じて前記四輪
駆動走行と二輪駆動走行を適宜切換え、同センサ（24）
により前記作業装置（４）が作業状態を検出していると
きには前記切換えを牽制して常時四輪駆動走行を維持す
るように構成したトラクタの走行装置。A tilling work device (4) is mounted so as to be able to move up and down, and a power transmission from an engine (7) to a front wheel (1) is electrically switched on and off to drive the vehicle in four-wheel drive and rear wheels. (2)
In the tractor configured to be able to switch to two-wheel drive traveling by the vehicle, the working state of the working device (4) is
Alternatively, a sensor (24) for detecting a non-working state and sensors (29) and (30) for detecting a slip state are provided, and the working device (4) detects the non-working state by the former sensor (24). When the vehicle is running, the four-wheel drive travel and the two-wheel drive travel are appropriately switched according to the slip state.
The tractor travel device is configured such that when the working device (4) detects a working state, the switching is suppressed and the four-wheel drive traveling is always maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6670589A JP2946521B2 (en) | 1989-03-17 | 1989-03-17 | Tractor traveling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6670589A JP2946521B2 (en) | 1989-03-17 | 1989-03-17 | Tractor traveling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02246876A JPH02246876A (en) | 1990-10-02 |
| JP2946521B2 true JP2946521B2 (en) | 1999-09-06 |
Family
ID=13323620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6670589A Expired - Fee Related JP2946521B2 (en) | 1989-03-17 | 1989-03-17 | Tractor traveling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2946521B2 (en) |
-
1989
- 1989-03-17 JP JP6670589A patent/JP2946521B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02246876A (en) | 1990-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |