JPS63214559A - Speed change system for mobile farm machine - Google Patents
Speed change system for mobile farm machineInfo
- Publication number
- JPS63214559A JPS63214559A JP4615987A JP4615987A JPS63214559A JP S63214559 A JPS63214559 A JP S63214559A JP 4615987 A JP4615987 A JP 4615987A JP 4615987 A JP4615987 A JP 4615987A JP S63214559 A JPS63214559 A JP S63214559A
- Authority
- JP
- Japan
- Prior art keywords
- angle
- lever
- sensor
- swash plate
- speed
- 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.)
- Pending
Links
- 230000008859 change Effects 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Harvester Elements (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、移動農機の変速操作方式に関し、コンバイ
ン、トラクタ、等の移動農機の変速操作に利用できる。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for changing the speed of a mobile agricultural machine, and can be used for changing the speed of a mobile agricultural machine such as a combine harvester or a tractor.
イt 愈 +に辷 召(セ5hvtl大 ロロ ↓t
kll :Ht I し ス し −μ t 口
目題点
従来、コンバイン等において油圧無段変速装置を変速操
作する場合、一般に作業部の負荷センサ等の検出に起因
して油圧シリンダで直接転盤を押し引して斜盤角を変更
して変速するのが一般的でこの場合円滑に変速できるが
、手動で変速操作する場合は手動変速レバーの操作押圧
力が一定せず急激過ぎたり弱すぎたり目標の変速速度に
円滑に切替えられなかったり、時間がかかったりする問
題があった。It 戈
kll : Ht I shi sushi - μ t Topic point Conventionally, when operating a hydraulic continuously variable transmission in a combine harvester, etc., the turning was generally performed directly by a hydraulic cylinder due to detection by a load sensor, etc. in the working part. Generally, gears are shifted by pushing and pulling to change the slope angle, and in this case the gears can be shifted smoothly, but when shifting manually, the operating pressure of the manual shift lever is inconsistent and may be too sudden or too weak. There was a problem that the gear shift speed could not be smoothly changed to the target speed or that it took a long time.
問題点を解決するための手段
この発明は、油圧無段変速装置(1)の入力側可変容量
型ポンプ(2)の駆動を制御する斜盤(3)の角度を連
動操作する手動用変速レバー(4)に、この変速レバー
(4)の操作角度を検出するレバーセンサ(5)を設け
、該斜盤(3)の角度を検出する斜盤角センサ(6)の
検出値と、該レバーセンサ(5)の検出値とを比較して
、その差が大きい程速やかに、該変速レバー(4)の操
作角度に応じた目標の斜盤角に補正するよう制御してな
る移動農機の変速操作方式の構成とする。Means for Solving the Problems This invention provides a manual gear shift lever that interlocks the angle of a slant plate (3) that controls the drive of an input side variable displacement pump (2) of a hydraulic continuously variable transmission (1). (4) is provided with a lever sensor (5) that detects the operating angle of this gear shift lever (4), and the detection value of the slope angle sensor (6) that detects the angle of the slope plate (3) and the lever The gear shift of the mobile agricultural machine is performed by comparing the detection value of the sensor (5) and controlling the gear so that the larger the difference, the more quickly the tilt angle is corrected to the target slope angle according to the operating angle of the gear shift lever (4). The structure is based on the operation method.
発明の作用、および効果
油圧無段変速装置(1)の手動用変速レバー(4)を例
えば前進の増速側へ操作すると、レバーセンサ(5)が
この変速レバー(4)の操作角度を検出すると共に、変
速レバー(4)に連動された斜盤(3)の角度が変更さ
れ、可変容量型ポンプの容量が変り油圧回路で連結され
る出力側の油圧モータが増速され増速された出力軸によ
って、伝動部が増速側に変速されるもので、変速レバー
(4)に連動された斜盤(3)の斜盤角センサ(6)が
角度を検出し、補正制御部に、該レバーセンサ(5)の
検出値、斜盤角センサ(6)の検出値とが入力されると
、この方式による補正制御部がこれらの値を比較し、そ
の差が大きい程遠やかに、自動的に該変速レバー(4)
の操作角度、すなわち、レバーセンサ(5)の検出値に
応じた目標の斜盤角に補正制御されるので、手動操作者
は、円滑に速やかに目標の変速速度が自動的に得られる
ので、手動変速操作が容易になるので良い。Functions and Effects of the Invention When the manual shift lever (4) of the hydraulic continuously variable transmission (1) is operated, for example, to the forward speed increasing side, the lever sensor (5) detects the operating angle of the shift lever (4). At the same time, the angle of the slope plate (3) linked to the speed change lever (4) was changed, the capacity of the variable displacement pump was changed, and the output side hydraulic motor connected by the hydraulic circuit was increased in speed. The transmission part is shifted to the speed increasing side by the output shaft, and the slant plate angle sensor (6) of the slant plate (3) linked to the speed change lever (4) detects the angle, and the correction control part When the detected value of the lever sensor (5) and the detected value of the slope angle sensor (6) are input, the correction control unit using this method compares these values, and the larger the difference, the farther the , automatically the gear shift lever (4)
, that is, the target slant angle according to the detected value of the lever sensor (5), so that the manual operator can automatically obtain the target shifting speed smoothly and quickly. This is good because it makes manual gear shifting easier.
実施例
尚、図例において油圧無段変速装置(1)は、原動機か
ら伝動される入力軸(7)に、この軸芯を中心とした円
周上に複数のシリンダ(8)とピストン(9)とを有す
るポンプを等配分に配置した可変容量型ポンプ(2)と
、その駆動を制御する斜盤(3)とを装置し、出力軸(
10)には、該可変容量型ポンプ(2)の各シリンダ(
8)に対応したシリンダ(11)と、ピストン(12)
とを有すると共に、出力軸(10)に固定した固定斜面
を有する固定側盤(13)を備えた固定容量型モータ(
14)を装置し、該ポンプ(2)の各シリンダ(8)と
該モータ(14)の各シリンダ(11)とを油圧管配管
(15)で連結し、この配管(15)に、該入力軸(7
)から伝導回転されるチャージポンプ(1B)のオイル
を圧入し、この各配管(15)には高圧リリーフバルブ
(17)、フィードバルブ(1B)、ニュートラルバル
ブ(13)等を設けると共に、配管(15)内の減損圧
油を補充するためのストレーナ(20)を有したオイル
補給タンク(21) 。Embodiment In the illustrated example, the hydraulic continuously variable transmission (1) has a plurality of cylinders (8) and pistons (9) arranged on an input shaft (7) that is transmitted from a prime mover on a circumference centered on this axis. ) and a variable displacement pump (2) arranged in equal distribution, and a slant plate (3) for controlling the drive of the variable displacement pump (2).
10) includes each cylinder (
8) corresponding cylinder (11) and piston (12)
and a fixed capacity motor (13) having a fixed slope fixed to the output shaft (10).
14), each cylinder (8) of the pump (2) and each cylinder (11) of the motor (14) are connected by a hydraulic pipe (15), and the input is connected to this pipe (15). Axis (7
), oil from a charge pump (1B) which is rotated by conduction is injected under pressure, and each pipe (15) is provided with a high pressure relief valve (17), a feed valve (1B), a neutral valve (13), etc. an oil replenishment tank (21) with a strainer (20) for replenishing the depleted pressure oil in 15);
オイルクーラ(22) 、 フィンフィルタ(23)
等を有した補油回路(24)を具備し、入力軸(7)の
回転によって回転する該ポンプ(2)の該軸(7)を中
心として直径方向に対向する一対のシリンダ(8)(8
)に連結される該配管(15)と(15)が高圧側(イ
)と低圧側(ロ)になり、入力軸(7)の回転方向に各
一対のシリンダ(8) (8)が順送りに替る圧力を
固定容量型モータ(14)のシリンダ(11)に伝え、
固定斜板(13)に回転力を与えて出力軸(10)を回
転させる形態の公知の油圧無段変速装置(1)としてい
る、出力軸(10)から、移動農機の走行装置へ伝動す
るものである。第2図に示すものは、前進時の状態であ
る。Oil cooler (22), fin filter (23)
A pair of cylinders (8) diametrically opposed to each other about the shaft (7) of the pump (2) rotates by rotation of the input shaft (7). 8
) are connected to the high pressure side (a) and low pressure side (b), and each pair of cylinders (8) and (8) are fed sequentially in the rotational direction of the input shaft (7). transmitting pressure to the cylinder (11) of the fixed displacement motor (14),
This is a known hydraulic continuously variable transmission (1) that rotates an output shaft (10) by applying rotational force to a fixed swash plate (13), and transmits power from the output shaft (10) to the traveling device of a mobile agricultural machine. It is something. What is shown in FIG. 2 is the state when moving forward.
斜盤(3)は、該可変容量型ポンプ(2)のピストン(
8)のロッド端側を受ける斜面を入力軸(7)に対して
直交する姿勢をニュートラルとし、各ピストン(9)は
シリンダ(8)に対して動かないので、動力を該モータ
(14)に伝えない。The slant plate (3) is connected to the piston (
The neutral position is such that the slope that receives the rod end side of 8) is perpendicular to the input shaft (7), and since each piston (9) does not move relative to the cylinder (8), the power is transferred to the motor (14). I can't tell you.
このニュートラル姿勢から一方へ倒した場合が前である
。この斜盤(3)には該入力軸(7)と直交する方向の
左右何れか一側に斜盤軸(25)を設けてあり、この軸
(25)回りに回動傾斜させるものである。斜盤軸(2
5)には速度制御レバー(2B)を設けている。斜盤角
(ハ)は、ニュートラル位置からの傾斜角度である。The forward position is when the body is tilted to one side from this neutral position. This slant plate (3) is provided with a slant plate shaft (25) on either the left or right side in the direction perpendicular to the input shaft (7), and is rotated and tilted around this shaft (25). . Slope shaft (2
5) is provided with a speed control lever (2B). The slope angle (c) is the slope angle from the neutral position.
変速レバー(4)は、移動農機の操縦部に設け、該斜盤
軸(25)の速度制御レバー(2B)との間に、ロッド
(27)、牽制ワイヤ(2日)等で連動構成した連動部
を設け、レバー(4)下端にレバー軸(23)を設けて
いる。この連動部に、該速度制御レバー(28)は固定
のまま変速レバー(4)が制御可能の角度だけ動き得る
差動緩衝器(50)を設けている。The speed change lever (4) was installed in the control section of the mobile agricultural machine, and interlocked with the speed control lever (2B) of the slope shaft (25) using a rod (27), check wire (2 days), etc. An interlocking part is provided, and a lever shaft (23) is provided at the lower end of the lever (4). This interlocking portion is provided with a differential shock absorber (50) that allows the speed control lever (28) to move by an angle that allows the speed change lever (4) to be controlled while the speed control lever (28) remains fixed.
レバーセンサ(5)はポテンショメータとし、ポテンシ
ョメータのセンナ軸を、変速レバー(4)の該レバー軸
(28)に連結して設けている。(30)は、中間レバ
ーである。The lever sensor (5) is a potentiometer, and a sensor shaft of the potentiometer is connected to the lever shaft (28) of the speed change lever (4). (30) is an intermediate lever.
斜盤角センサ(6)は、ポテンシオメータとし、前記斜
盤軸(25)にポテンショメータのセンサ軸を連結して
設けている。The slant plate angle sensor (6) is a potentiometer, and a sensor shaft of the potentiometer is connected to the slant plate shaft (25).
転盤(3)の斜盤角補正のための機構的構成は、第1図
のように該速度制御レバー(2B)に複動型油圧シリン
ダ(31)を連結して設け、この油圧シリンダ(31)
にオイルタンク(32) 、オイルポンプ(33)、ア
ンロード弁(34) 、 リリーフバルブ(35)
、前進側ソレノイド(3B)と、後進側ソレノイド(3
7)とを有した、ソレノイドバルブ(38)を配設した
油圧回路を連結構成している。前進側ソレノイド(36
)と、後進側ソレノイド(37)とは、制御cpu(4
8)が、斜盤角センサ(6)の検出値と、レバーセンサ
(5)の検出値から前進か後進かを判断すると共に、こ
れらを比較して、差の大きさを規準値範囲と比較し、規
準内であれば作動せず、規準外であれば検出値の差の大
小別にソレノイド(3B)又は(37)の作動時間を選
択的に決め、油圧シリンダ(31)を作動させて斜盤角
を補正する制御構成としている。The mechanical configuration for correcting the slope angle of the turntable (3) is as shown in FIG. 1, in which a double acting hydraulic cylinder (31) is connected to the speed control lever (2B), 31)
Oil tank (32), oil pump (33), unload valve (34), relief valve (35)
, the forward solenoid (3B), and the reverse solenoid (3B).
7), and a hydraulic circuit in which a solenoid valve (38) is arranged is connected. Forward side solenoid (36
) and the reverse solenoid (37) are the control CPU (4
8) determines whether to move forward or backward based on the detected value of the slope angle sensor (6) and the detected value of the lever sensor (5), compares these, and compares the size of the difference with the standard value range. If it is within the standard, it will not operate, and if it is outside the standard, the operating time of the solenoid (3B) or (37) will be selectively determined depending on the magnitude of the difference in the detected value, and the hydraulic cylinder (31) will be operated to prevent the tilting. It has a control configuration that corrects the disc angle.
第3図の制御ブロック図における(39) (40)
はA/D変換回路、(48)は制御cpu、(43)は
、リセットで制御終了にできる制御スタートボタン、(
41) (42)は出力回路を示す、該(48)は、
移動作業機の操縦部に設けられる。また、第4図のフロ
ーチャートにおける、(43)はスタート、(vl)は
、レバーセンサ(5)の検出値の読込み、(v2)は、
斜盤角センサ(6)の検出値の読込み、(44)は差が
範囲内か、(45)は。(39) (40) in the control block diagram of Fig. 3
is an A/D conversion circuit, (48) is a control CPU, (43) is a control start button that can be reset to end the control, (
41) (42) indicates an output circuit, and (48) is
Installed in the control section of the mobile work machine. In addition, in the flowchart of FIG. 4, (43) is the start, (vl) is the reading of the detection value of the lever sensor (5), and (v2) is
Read the detected value of the slant angle sensor (6). Is the difference in (44) within the range? (45).
差が一定値以上か、(4B)は、一定時間(長)前進側
ソレノイド駆動、(47)は、一定時間(短)前進側ソ
レノイド駆動、であって前進の場合を例示している。Whether the difference is greater than a certain value or not, (4B) is the forward-side solenoid drive for a certain period of time (long), and (47) is the forward-side solenoid drive for a certain period of time (short), illustrating the case of forward movement.
制御スタートボタン(49)を押し、変速レバー(4)
をニュートラル位置から前進側に引くと油圧シリンダ(
31)で固定された転盤の速度制御レバー(28)は連
動しないが、該差動緩衝器が作用して変速レバー(4)
が制御しない範囲を超えて制御可能の角度だけ倒れると
、制御スタート(43)していた制御cpuが変速レバ
ー(4)のレバーセンサ(5)の出力値(Vl)と斜盤
角センサ(6)の出力値(v2)を比較し差が一定値以
上か(45)の判断をし、YESならば、長い方の一定
時間、Noならば短い方の一定時間、前進側ソレノイド
(3B)をスイッチONするので油圧シリンダ(31)
が伸動して該速度制御レバー(2B)を押し、斜盤軸(
25)を回転させてはソレノイドバルブ(3日)の図示
姿勢の固定位置に切替る。連続して行なうフローチャー
トのような制御によって、変速レバー(4)の動きに追
随して速度制御レバー(26)が前進増速方向に斜盤角
を増大させ、油圧無段変速装置(1)の可変容量型ポン
プ(2)からの配管(15)の圧力が上昇して出力軸(
10)が増速されて、伝動される移動車体の走行装置は
増速される。必要な速度に達したとき変速レバー(4)
を止めると、油圧シリンダ(31)がソレノイドバルブ
の図示の中立位置のポート(ニ)になることによって固
定され、固定された速度制御レバー(26)によって固
定した斜盤角の転盤(3)によって一定速度で走行でき
る。減速する場合、変速しt< −(4)をニュートラ
ルに近い方に動かすと、茄)−@繕の勺1濶でI、思か
連音に4ウソできるものである。後進の場合も検出値の
大きさ等によって制御cpu(4B)が後進であること
を、判断して、同様の制御ができる。第3図のブロック
図で説明すると、レバーセンサ(5)と斜盤角センサ(
6)からの検出アナログ信号が夫々のA/D変換回路(
39) (40)でデジタル信号に換えられて、制御
スタートボタン(43)スイッチONされていた制御c
p u (48)に入り、cpu(4B)は前記のフ
ローチャートに示すプログラムを遂行し、前進か後進か
の判断も行ない、例えば前進側ソレノイド(3B)を一
定時間ONさせて油圧シリンダ(31)を作動させ、油
圧無段変速装置(1)を変速させるものである。続いて
また同じスタートにもどり同様のことを繰返すもので最
終的に目標の速度に達して、レバーセンサ(5)の検出
値(vl)と斜盤角センサ(6)の検出値(V2)の差
が許容できる範囲内に達して一定速に維持走行するもの
である。Press the control start button (49) and shift lever (4)
When pulled from the neutral position to the forward side, the hydraulic cylinder (
The speed control lever (28) of the turntable fixed with
If the controllable angle exceeds the uncontrollable range and falls by the controllable angle, the control CPU that was starting the control (43) changes the output value (Vl) of the lever sensor (5) of the gear shift lever (4) and the slope angle sensor (6). ) and determines whether the difference is greater than a certain value (45), and if YES, the longer one for a certain period of time, if No, the shorter one for a certain period of time, the forward side solenoid (3B) is activated. Since the switch is turned on, the hydraulic cylinder (31)
extends and pushes the speed control lever (2B), and the slope shaft (
25) to switch to the fixed position of the solenoid valve (3 days) shown in the figure. Through continuous control as shown in the flowchart, the speed control lever (26) increases the slope angle in the forward speed increasing direction following the movement of the speed change lever (4), thereby increasing the slope angle of the hydraulic continuously variable transmission (1). The pressure in the piping (15) from the variable displacement pump (2) increases and the output shaft (
10) is increased in speed, and the traveling device of the moving vehicle body to which the transmission is transmitted is increased in speed. When the required speed is reached, shift lever (4)
When stopped, the hydraulic cylinder (31) is fixed by the solenoid valve's neutral position port (d) as shown, and the slope angle turntable (3) is fixed by the fixed speed control lever (26). This allows the vehicle to travel at a constant speed. When decelerating, if you change gears and move t<-(4) closer to neutral, you can make 4 lies in I and Mokaka consecutive sounds with 1 yen of 茕)-@make. In the case of reversing, the control CPU (4B) determines that the vehicle is reversing based on the magnitude of the detected value, and similar control can be performed. To explain using the block diagram in Fig. 3, the lever sensor (5) and the slope angle sensor (
The detected analog signal from 6) is sent to each A/D conversion circuit (
39) The control c that was converted to a digital signal at (40) and the control start button (43) was turned on.
The CPU (4B) executes the program shown in the flowchart above, and also determines whether to move forward or backward.For example, the forward solenoid (3B) is turned on for a certain period of time, and the hydraulic cylinder (31) is turned on. The hydraulic continuously variable transmission (1) is operated to change the speed of the hydraulic continuously variable transmission (1). Next, we return to the same start and repeat the same process until the target speed is finally reached and the detected value (vl) of the lever sensor (5) and the detected value (V2) of the slope angle sensor (6) are The vehicle maintains a constant speed when the difference is within an acceptable range.
図例の手動変速レバー(4)と、速度制御レバー (2
6)と、油圧シリンダ(31)との連動構成にすると、
変速レバー(4)の操作に要する力は、該差動緩衝器(
50)のばね等の圧縮力だけでよいから楽に操作でき、
速やかに変速できるのでよい。The manual gear shift lever (4) and speed control lever (2) shown in the illustration
6) and the hydraulic cylinder (31),
The force required to operate the gear shift lever (4) depends on the differential shock absorber (
50) It is easy to operate because only the compression force of the spring etc. is required.
It's good because you can change gears quickly.
尚、油圧シリンダ(31)は移動車体の原動機にかかる
負荷等に起因して変速自動制御する制御機構等に切替兼
用できる形態に設けてもよいものである。Incidentally, the hydraulic cylinder (31) may be provided in a form that can also be used as a control mechanism for automatically controlling the speed change due to the load on the prime mover of the moving vehicle.
図は、この発明の一実施例を示すもので、第1図は連動
制御作用説明図、第2図は油圧無段変速装置の油圧回路
図、第3図は制御作用ブロック図、第4図は制御プログ
ラムのフローチャート図tある。
図中、符号(1)は油圧無段変速装置、(2)は可変容
量型ポンプ、(3)は転盤、(4)は変速レバー、(5
)はレバーセンサ、(6)は斜盤角センサ、(14)は
固定容量型モータ、(31)は油圧シリンダ、(4日)
は制御cpu、(50)は差動緩衝器を示す。The figures show one embodiment of the present invention, in which Fig. 1 is an explanatory diagram of interlocking control action, Fig. 2 is a hydraulic circuit diagram of a hydraulic continuously variable transmission, Fig. 3 is a control action block diagram, and Fig. 4 is a flowchart of the control program. In the figure, (1) is a hydraulic continuously variable transmission, (2) is a variable displacement pump, (3) is a turntable, (4) is a speed change lever, and (5) is a variable displacement pump.
) is the lever sensor, (6) is the slope angle sensor, (14) is the fixed displacement motor, (31) is the hydraulic cylinder, (4 days)
indicates a control CPU, and (50) indicates a differential buffer.
Claims (1)
)の駆動を制御する斜盤(3)の角度を連動操作する手
動用変速レバー(4)に、この変速レバー(4)の操作
角度を検出するレバーセンサ(5)を設け、該斜盤(3
)の角度を検出する斜盤角センサ(6)の検出値と、該
レバーセンサ(5)の検出値とを比較して、その差が大
きい程速やかに、該変速レバー(4)の操作角度に応じ
た目標の斜盤角に補正するよう制御してなる移動農機の
変速操作方式。Input side variable displacement pump (2) of hydraulic continuously variable transmission (1)
A lever sensor (5) that detects the operating angle of the gear shift lever (4) is provided on a manual gear shift lever (4) that interlocks the angle of the tilt plate (3) that controls the drive of the gear shift lever (4). 3
) is compared with the detection value of the lever sensor (5), and the larger the difference, the more quickly the operating angle of the gear shift lever (4) is adjusted. A speed change operation method for a mobile agricultural machine that controls to correct the target slope angle according to the angle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4615987A JPS63214559A (en) | 1987-02-27 | 1987-02-27 | Speed change system for mobile farm machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4615987A JPS63214559A (en) | 1987-02-27 | 1987-02-27 | Speed change system for mobile farm machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63214559A true JPS63214559A (en) | 1988-09-07 |
Family
ID=12739221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4615987A Pending JPS63214559A (en) | 1987-02-27 | 1987-02-27 | Speed change system for mobile farm machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63214559A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002235849A (en) * | 2001-02-08 | 2002-08-23 | Ishikawajima Shibaura Mach Co Ltd | Speed changing device |
KR100397943B1 (en) * | 2001-07-12 | 2003-09-19 | 기아자동차주식회사 | Hydraulic control type tgs lever controller |
JP2008037400A (en) * | 2006-08-10 | 2008-02-21 | Kubota Corp | Shift operation structure for working vehicle |
JP2011214597A (en) * | 2010-03-31 | 2011-10-27 | Kubota Corp | Running drive control system |
-
1987
- 1987-02-27 JP JP4615987A patent/JPS63214559A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002235849A (en) * | 2001-02-08 | 2002-08-23 | Ishikawajima Shibaura Mach Co Ltd | Speed changing device |
KR100397943B1 (en) * | 2001-07-12 | 2003-09-19 | 기아자동차주식회사 | Hydraulic control type tgs lever controller |
JP2008037400A (en) * | 2006-08-10 | 2008-02-21 | Kubota Corp | Shift operation structure for working vehicle |
JP4695564B2 (en) * | 2006-08-10 | 2011-06-08 | 株式会社クボタ | Shifting operation structure of work vehicle |
JP2011214597A (en) * | 2010-03-31 | 2011-10-27 | Kubota Corp | Running drive control system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8316983B2 (en) | Construction vehicle | |
US5184466A (en) | Control and regulating device for a hydrostatic transmission | |
US8306704B2 (en) | Engine control device for working vehicle | |
US5473895A (en) | Hydrostatic travelling drive | |
KR102038787B1 (en) | Working vehicle | |
DE112014000203T5 (en) | Work vehicle and control method for work vehicle | |
US4280579A (en) | Control for tracked vehicle steering mechanism | |
JPS6372922A (en) | Automatic clutch control device | |
JPH04266657A (en) | Control device for maintaining speed relation between main drive device and auxiliary drive device | |
JPH0617928A (en) | Hydrostatic continuously variable transmission for travel | |
US4187739A (en) | Hydrostatic torque converter having a stepped transmission | |
US4132072A (en) | Hydrostatic converter | |
JPS63214559A (en) | Speed change system for mobile farm machine | |
DE69614017T2 (en) | Stepless toroidal gear | |
US10829909B2 (en) | Work vehicle and control method for work vehicle | |
US5678462A (en) | Hydrostatic travelling drive | |
JP2885518B2 (en) | Work vehicle control device | |
EP3719356B1 (en) | Hydrostatic transmission for a work vehicle provided with a system for reducing the jerk during direction inversion manoeuvres | |
US11952748B2 (en) | Work vehicle and control method for work vehicle | |
JPH0874995A (en) | Automatic speed changing structure of working vehicle | |
JP3176237B2 (en) | Work vehicle steering system | |
US6305164B1 (en) | Method and system for controlling hydraulic driving circuit | |
JPH0818574B2 (en) | Hydrostatic turning control device | |
JPS63190964A (en) | Speed change operating system for mobile farm machinery | |
US20220205214A1 (en) | Load-handling vehicle |