JP4604547B2 - Travel gear - Google Patents

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JP4604547B2
JP4604547B2 JP2004141458A JP2004141458A JP4604547B2 JP 4604547 B2 JP4604547 B2 JP 4604547B2 JP 2004141458 A JP2004141458 A JP 2004141458A JP 2004141458 A JP2004141458 A JP 2004141458A JP 4604547 B2 JP4604547 B2 JP 4604547B2
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turning
pressure
angle position
transmission
angular position
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JP2005319965A (en
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幹也 白方
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Iseki and Co Ltd
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Description

本発明は、コンバインに備えるクローラ等の走行手段に旋回走行可能に動力を伝達する走行伝動装置に関するものである。   The present invention relates to a traveling transmission device that transmits power to traveling means such as a crawler included in a combine so that the vehicle can turn.

左右のクローラに動力を伝達する走行伝動装置は、例えば、本出願人が先に提案した特許文献1に示すように、旋回内側の伝動系に対してブレーキ力を加えることにより抑速して旋回走行を可能とする。そのブレーキ力は、旋回レバーの傾倒角度と対応して変化するように、電磁制御、油圧制御等による旋回制御装置を設けることにより、旋回レバーの操作に応じて抑速調節し、旋回半径を調節することができる。また、標準よりブレーキ力を強く設定することにより、急旋回等の小回り旋回まで操作可能に旋回レンジを広げることができ、これを随時切替え可能とする「旋回力アップスイッチ」を設けることにより、幅広い旋回動作によって多様な状況に対応することが可能となる。   The traveling transmission device that transmits power to the left and right crawlers, for example, as shown in Patent Document 1 previously proposed by the present applicant, is controlled by applying a braking force to the transmission system inside the turning and turns Enables traveling. The braking force is adjusted according to the operation of the turning lever and the turning radius is adjusted by providing a turning control device by electromagnetic control, hydraulic control, etc. so that the braking force changes corresponding to the tilt angle of the turning lever. can do. In addition, by setting the braking force stronger than the standard, it is possible to widen the turning range so that it can be operated to small turns such as sudden turns, and by providing a "turning force up switch" that can be switched at any time, a wide range It is possible to cope with various situations by the turning operation.

しかし、上記のように、所謂スピンターンと称する急旋回を含む小回り旋回のために旋回力を増加した場合は、旋回入力具のレバー操作による動作感度が上がることとなり、中立不感帯を越える僅かなレバー操作でも、標準の場合より急な旋回動作となるので機体走行が不安定となり、操作性の低下を招く場合があった。
また、連続的にスピンターンに移行する制御では、車軸にかかる負荷が増大し、確実なスピンターンが得られなかった。
特開2003−146239号公報
However, as described above, when the turning force is increased due to a small turn including a sudden turn called a so-called spin turn, the operation sensitivity by the lever operation of the turning input tool increases, and a slight lever exceeding the neutral dead zone Even in operation, the vehicle turns more rapidly than in the standard case, so that the airframe travel becomes unstable and the operability may be lowered.
In addition, in the control that continuously shifts to the spin turn, the load applied to the axle increases, and a reliable spin turn cannot be obtained.
JP 2003-146239 A

解決しようとする問題点は、通常より小回り旋回動作するために旋回力を増加した場合においても、安定した旋回操作が可能となる走行伝動装置を提供することにある。   The problem to be solved is to provide a traveling transmission device that can perform a stable turning operation even when the turning force is increased because the turning operation is smaller than usual.

請求項1に係る発明は、
左右の伝動系の間の速度差をデフケース入力によって調節する差動機構と、そのデフケース入力を直進用の高速から旋回用の低速までの範囲で注入圧力に応じて伝動を切替える切替クラッチ(10a,10b)と、この切替クラッチ(10a,10b)への注入圧力を旋回入力具の旋回内側方向への傾動操作角度に応じて変化させる制御部とを備える走行伝動装置において、
上記制御部には、切替クラッチ(10a,10b)への注入圧力が、旋回入力具の所定の中立角度位置(Ai)から中間角度位置(Al)で旋回内外側が略同速とな初期圧(Pi)から中間圧(Pn)まで一様に圧力変化し、さらに所定の旋回角度位置(Ab)で所定の旋回速となる旋回圧(Pb)とし、中間角度位置(Al)から旋回角度位置(Ab)まで一様圧力変化し、旋回角度位置(Ab)から最大角度位置(Af)まで旋回圧(Pb)に保持する第一の伝動特性を設けるとともに、
スイッチ(33)操作により切替え可能な第二、第三の伝動特性を設け、
二の伝動特性は、上記中立角度位置(Ai)で上記初期圧(Pi)、上記第一の伝動特性にいて切替クラッチ(10a,10b)の伝動が切替わる中間角度位置(Al)で伝動切替えの中間圧(Pn)、上記旋回角度位置(Ab)で上記旋回圧(Pb)より所定幅を増加した急旋回圧(Ps)とし、これら中立角度位置(Ai)から中間角度位置(Al)までの範囲および中間角度位置(Al)から旋回角度位置(Ab)までの範囲で夫々一様に変化し、旋回角度位置(Ab)を超える操作角度範囲では上記急旋回圧(Ps)をえる最大旋回圧(Pf)に保持する特性であり、
第三の伝動特性は、中立角度位置(Ai)における初期圧(Pi)から中間角度位置(A1)における設定中間圧(P1)までの範囲および中間角度位置(A1)における設定中間圧(P1)から旋回角度位置(Ab)における急旋回圧(Ps)までの範囲で夫々一様に変化し、前記中間角度位置(Al)での圧力を、調整ダイヤル(35)で任意に設定される前記中間圧(Pn)よりも高い設定中間圧(Pl)として、前記第一の伝動特性よりも旋回力が増加する特性としたことを特徴とする。
The invention according to claim 1
A differential mechanism that adjusts the speed difference between the left and right transmission systems by a differential case input, and a switching clutch (10a, 10a, 10b), and a traveling transmission device including a control unit that changes the injection pressure to the switching clutch (10a, 10b) according to the tilting operation angle of the turning input tool in the turning inner direction.
The aforementioned control unit, the initial pressure injection pressure to switching clutch (10a, 10b) are substantially the same speed preparative ing turning the outside predetermined neutral angular position of the turning input implement from (Ai) at an intermediate angular position (Al) The pressure changes uniformly from (Pi) to the intermediate pressure (Pn), and the turning pressure (Pb) at which the turning speed becomes a predetermined turning speed at the predetermined turning angle position (Ab), and the turning angle position from the intermediate angle position (Al). and the pressure change in the uniform up (Ab), provided with a first transmission characteristic to hold the turning pressure from the pivot angle position (Ab) to the maximum angular position (Af) (Pb),
The second and third transmission characteristics that can be switched by operating the switch (33) are provided.
The second transmission characteristic, in the neutral angular position (Ai) at the initial pressure (Pi), an intermediate angular position transmission is switched in the switching clutch have you to the first transmission characteristic (10a, 10b) (Al) Intermediate pressure (Pn) for transmission switching, sudden turning pressure (Ps) having a predetermined width increased from the turning pressure (Pb) at the turning angle position (Ab), and the intermediate angle position (Al) from the neutral angle position (Ai) ) to each uniformly varies in the range and scope of the intermediate angular position (Al) to pivot angle position (Ab) of said steep turn pressure in the operating angle range exceeding the turning angular position (Ab) to (Ps) ultra a characteristic that holds the maximum turning pressure (Pf) to obtain,
The third transmission characteristic is the range from the initial pressure (Pi) at the neutral angle position (Ai) to the set intermediate pressure (P1) at the intermediate angle position (A1) and the set intermediate pressure (P1) at the intermediate angle position (A1) . turning angular position (Ab) changes each uniformly in the range up to sudden turning pressure (Ps) in the said intermediate said pressure in the intermediate angular position (Al), is set arbitrarily adjust dial (35) The set intermediate pressure (Pl) higher than the pressure (Pn) is characterized in that the turning force increases more than the first transmission characteristic .

第一の伝動特性により、旋回入力具の傾動操作により内外側の速度差と対応して旋回力が発生し、この旋回力は、中立角度位置から中間角度位置まで、中間角度位置から旋回角度位置までの範囲について旋回入力具の傾動操作角度に応じてそれぞれ一様に変化するように制御され、直進動作から所定の旋回動作までの間で操作することができる。スイッチ操作により第二の伝動特性に切替えられると、中立角度位置から中間角度位置までの範囲においては第一の伝動特性と同様に旋回内側の伝動速度が直進速度から駆動力ゼロになるまで変化し、この中間角度位置から旋回角度位置までの範囲では、旋回内側の伝動速度が駆動力ゼロの状態から増加旋回圧まで変化することにより、増加した旋回力が連続的に変化して小回り旋回走行制御に移行される。
スイッチ操作により第三の伝動特性に切替えられると、中立角度位置から中間角度位置までの範囲および中間角度位置から旋回角度位置までの範囲で調整ダイヤルで任意に設定された設定中間圧により機体が旋回動作する。
Due to the first transmission characteristic, a turning force is generated by the tilting operation of the turning input tool corresponding to the inner and outer speed difference, and this turning force is from the neutral angle position to the intermediate angle position, and from the intermediate angle position to the turning angle position. The range up to is controlled so as to change uniformly according to the tilting operation angle of the turning input tool, and can be operated from a straight running operation to a predetermined turning operation. When switched to the second transmission characteristic by switch operation, the transmission speed inside the turn changes from the straight traveling speed to the driving force zero in the range from the neutral angle position to the intermediate angle position as in the first transmission characteristic. In the range from the intermediate angle position to the turning angle position, the increased turning force continuously changes as the transmission speed inside the turning changes from the state where the driving force is zero to the increased turning pressure, and the small turning turning control is performed. It is transferred to.
When switched to the third transmission characteristic by switch operation, the aircraft turns with the set intermediate pressure arbitrarily set with the adjustment dial in the range from the neutral angle position to the intermediate angle position and in the range from the intermediate angle position to the turning angle position. Operate.

請求項1の効果は、第一の伝動特性により、中立角度位置から旋回角度位置までの操作と対応して直進走行から旋回走行までの範囲の旋回ができる。スイッチ操作により、旋回内側伝動系の伝動速度が駆動力ゼロとなる中間角度位置から旋回力が連続的に増大して、小回り旋回動作する第二の伝動特性に切替えられることから、中間角度位置における旋回力の急激な変動を招くことなく、旋回入力具の操作に応じて、例えば急旋回まで含むようなスムーズな小回り旋回が可能となる。旋回角度位置を越える角度範囲では急旋回速に保持できる。
このように、第一の伝動特性による旋回操作により旋回入力具の傾動操作に応じて直進走行から所謂ブレーキ旋回の範囲による比較的緩慢な旋回走行を行うことができ、この場合において、スイッチを操作することによって第二、第三の伝動特性に変更され、操作性に優れる小回り旋回をオペレータが随時選択することができる。
また、スイッチ操作により、中間角度位置(A1)から旋回角度位置(Ab)までの範囲で、中立角度位置(Ai)から中間角度位置(A1)までの範囲に比べて旋回入力具の傾動操作角度に対する旋回クラッチ注入圧力の変化量が大きい旋回特性である上記第二の伝動特性と、中間角度位置(A1)から旋回角度位置(Ab)までの範囲で、中立角度位置(Ai)から中間角度位置(A1)までの範囲に比べて旋回入力具の傾動操作角度に対する旋回クラッチ注入圧力の変化量が小さい旋回特性である第三の伝動特性に切替えられることから、小回り旋回走行制御における操作性を個々のオペレータの好みに対応させることができる。
The effect of claim 1 is that the first transmission characteristic enables a turn in a range from a straight running to a turning run corresponding to the operation from the neutral angle position to the turning angle position. By the switch operation, the turning force continuously increases from the intermediate angle position where the transmission speed of the turning inner transmission system becomes zero driving force, and is switched to the second transmission characteristic that makes a small turning operation. A smooth small turn including, for example, a sudden turn can be made according to the operation of the turning input tool without causing a sudden change in the turning force. Sudden turning speed can be maintained in an angle range exceeding the turning angle position.
As described above, the turning operation based on the first transmission characteristic enables the relatively slow turning traveling in the range of straight traveling to the so-called brake turning according to the tilting operation of the turning input tool. In this case, the switch is operated. By doing so, the operator can select at any time a small turn that is changed to the second and third transmission characteristics and is excellent in operability.
Further, the tilting operation angle of the swivel input tool in the range from the intermediate angle position (A1) to the intermediate angle position (A1) in the range from the intermediate angle position (A1) to the turning angle position (Ab) by the switch operation. The second transmission characteristic, which is a turning characteristic with a large change amount of the turning clutch injection pressure with respect to the intermediate angle position (Ai) to the intermediate angle position in the range from the intermediate angle position (A1) to the turning angle position (Ab). Since the change amount of the turning clutch injection pressure with respect to the tilting operation angle of the turning input tool is small compared to the range up to (A1), it is switched to the third transmission characteristic which is a turning characteristic. It can correspond to the operator's preference.

上記技術思想に基づき具体的に構成された実施の形態について以下に図面を参照しつつ説明する。
コンバインは、図1に示すように、刈取部A、脱穀部B、収納部C、搬出部D等の作業機と、走行用の左右のクローラE,Eと、作業機稼動および機体走行を操作するための操縦部F等を備える。この機体内には、図示せぬ原動機とその動力を受けて左右のクローラE,E等を駆動する走行伝動装置等を備える。
Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings.
As shown in FIG. 1, the combine operates the working machines such as the reaping part A, the threshing part B, the storage part C, and the unloading part D, the left and right crawlers E and E, and the working machine operation and the machine traveling. The control part F etc. for performing are provided. In the body, a prime mover (not shown) and a traveling transmission device that drives the left and right crawlers E, E and the like by receiving the power are provided.

上記コンバインは、その機体の進行方向を変えるべく旋回走行する場合には、左右のクローラE,Eの旋回内側の回転を調節するべく、走行伝動装置の旋回調節部において、左右の走行系の旋回内側の回転伝動を走行伝動系から旋回調節系に切り替え、この旋回調節系に設けた切替クラッチを介して旋回内側の回転速度を調節する。   When the combine makes a turn to change the advancing direction of the airframe, the turn of the left and right traveling systems is adjusted in the turn adjusting portion of the drive transmission device in order to adjust the rotation of the left and right crawlers E and E inside the turn. The inner rotation transmission is switched from the traveling transmission system to the turning adjustment system, and the rotation speed inside the turning is adjusted via a switching clutch provided in the turning adjustment system.

図2は、走行伝動装置の軸線展開要部断面図である。図2において、走行伝動装置1は、ミッションケース1a内に、伝動順に、図示せぬ無段変速機の動力を受ける入力軸3、その動力を中間軸3a経由で受ける副変速軸6、その変速動力を受けるカウンタ軸7、そのカウンタ出力を受けて左右の伝動系に動力を分けるサイドクラッチ軸9、その軸出力を高低2速で受ける2連クラッチ軸11、その無段減速動力をデフケース12に受ける差動機構を構成する差動ギヤ軸13s、その左右の差動動力とともに上記サイドクラッチ軸9から左右の伝動系を受ける左右の出力ギヤー14,14を介して左右のクローラe、eに減速伝動する左右のホイール軸15,15等を備えて構成される。   FIG. 2 is a cross-sectional view of a main part of an axial development of the traveling transmission device. In FIG. 2, a traveling transmission device 1 includes, in a transmission case, an input shaft 3 that receives power from a continuously variable transmission (not shown), a sub-transmission shaft 6 that receives the power via an intermediate shaft 3a, A counter shaft 7 that receives power, a side clutch shaft 9 that receives the counter output and divides the power into left and right transmission systems, a double clutch shaft 11 that receives the shaft output at high and low speeds, and continuously variable reduction power to the differential case 12 The left and right crawlers e and e are decelerated through the differential gear shaft 13s constituting the receiving differential mechanism and the left and right output gears 14 and 14 that receive the left and right transmission systems from the side clutch shaft 9 together with the left and right differential power. The left and right wheel shafts 15, 15, etc. are configured to transmit.

詳細には、入力軸3は、図示せぬ静油圧式無段変速機を介して原動機動力を受ける導入部である。副変速軸6は、レバー操作によりポジション選択可能なスライドギヤ5を備え、入力軸3の動力を複数のギヤ比(図例は3速)でカウンタ軸7に変速出力する副変速機構を構成する。カウンタ軸7は、変速動力を所定伝動比で減速出力する減速ギヤ7aを備える。サイドクラッチ軸9は、カウンタ軸7の動力を受けるセンターギヤ9aの他に小径ギヤ9bを備えるとともに、軸線方向にそれぞれ係脱可能な左右のサイドクラッチギヤ8,8を備えて伝動制御可能に動力を左右に分ける。   Specifically, the input shaft 3 is an introduction portion that receives prime mover power via a hydrostatic continuously variable transmission (not shown). The sub-transmission shaft 6 includes a slide gear 5 whose position can be selected by lever operation, and constitutes a sub-transmission mechanism that shifts and outputs the power of the input shaft 3 to the counter shaft 7 at a plurality of gear ratios (third speed in the figure). . The counter shaft 7 includes a reduction gear 7a that decelerates and outputs the speed change power at a predetermined transmission ratio. The side clutch shaft 9 includes a small gear 9b in addition to the center gear 9a that receives the power of the counter shaft 7, and includes left and right side clutch gears 8 and 8 that can be engaged and disengaged in the axial direction. Is divided into left and right.

2連クラッチ軸11は、油圧パック構成の2連クラッチ機構(切替クラッチ)10a,10bと出力ギヤ11gとを備え、かつ、2連クラッチ機構10a,10bの各クラッチの入力ギヤとして小径の直進用ギヤ11aと大径の旋回用ギヤ11bとを配置する。これら直進用ギヤ11aと旋回用ギヤ11bは、それぞれに対応してサイドクラッチ軸9のセンターギヤ9a、小径ギヤ9bと常時噛合する。2連クラッチ機構10a,10bをその軸線方向の油圧動作により伝動制御することにより、その低速回転側の制動力に応じてサイドクラッチ軸9から受ける2速の範囲で2連クラッチ軸11が無段階に減速制御される。   The double clutch shaft 11 is provided with two clutch mechanisms (switching clutches) 10a, 10b and an output gear 11g having a hydraulic pack configuration, and is used for linear travel of a small diameter as an input gear of each clutch of the dual clutch mechanisms 10a, 10b. A gear 11a and a large-diameter turning gear 11b are arranged. The linear gear 11a and the turning gear 11b are always meshed with the center gear 9a and the small-diameter gear 9b of the side clutch shaft 9, respectively. By performing transmission control of the dual clutch mechanisms 10a and 10b by hydraulic operation in the axial direction, the dual clutch shaft 11 is stepless within the range of the second speed received from the side clutch shaft 9 according to the braking force on the low speed rotation side. Is controlled to decelerate.

差動ギヤ軸13sは、差動軸として機能するスリーブ状の左右の差動ギヤ13,13を軸支し、これら左右の差動ギヤ13,13に挟まれた中央位置で両者を差動させるデフケース12にデフケースギヤ12cを備えて差動機構を形成する。デフケースギヤ12cは、2連クラッチ軸11の出力ギヤ11gと噛合する。また、サイドクラッチ軸9の左右のサイドクラッチギヤ8,8から左右の出力ギヤー14,14を介して左右の差動ギヤ13,13に到る直進減速比が、センターギヤ9aからデフケースギヤ12cまでの直進減速比と等しくなるように関係ギヤの歯数を設定する。   The differential gear shaft 13s pivotally supports sleeve-like left and right differential gears 13 and 13 that function as differential shafts, and makes the two differential at a central position sandwiched between the left and right differential gears 13 and 13. The differential case 12 is provided with a differential case gear 12c to form a differential mechanism. The differential case gear 12 c meshes with the output gear 11 g of the double clutch shaft 11. Further, the linear reduction ratio from the left and right side clutch gears 8 and 8 of the side clutch shaft 9 to the left and right differential gears 13 and 13 via the left and right output gears 14 and 14 is from the center gear 9a to the differential case gear 12c. The number of teeth of the related gear is set so as to be equal to the straight speed reduction ratio.

上記走行伝動装置1による直進走行の際は、サイドクラッチ軸9の左右のサイドクラッチギヤ8,8から左右の出力ギヤー14,14を介してそれぞれのホイール軸15,15に左右同速で伝動されて直進走行伝動を行う。また、旋回走行時は、旋回内側の伝動系をサイドクラッチギヤ8によって切断するとともに、2連クラッチ機構10a,10bの制動力による2連クラッチ軸11の減速に応じてデフケース12が減速され、対応する側の出力ギヤー14が差動減速されて旋回走行伝動を行う。   When traveling straight by the travel transmission device 1, the left and right side clutch gears 8 and 8 of the side clutch shaft 9 are transmitted to the respective wheel shafts 15 and 15 through the left and right output gears 14 and 14 at the same left and right speeds. To drive straight ahead. Further, during turning, the transmission system inside the turning is disconnected by the side clutch gear 8, and the differential case 12 is decelerated in response to the deceleration of the double clutch shaft 11 by the braking force of the double clutch mechanisms 10a, 10b. The output gear 14 on the side to be driven is differentially decelerated to perform turning traveling transmission.

上記走行伝動装置1による旋回調節は、サイドクラッチ軸9の旋回用の低速ギヤ9bによる減速範囲内で、2連クラッチ機構10a,10bへの注入圧力に応じて定められる内外側の伝動速度差に応じた旋回半径で機体旋回が可能となる。具体的には、旋回内側の伝動速度が外側より低速の緩旋回から、旋回内側を停止速(速度ゼロ)とするブレーキ旋回、旋回内側が外側伝動系と逆方向の所定速(例えば、外側速度の1/3)とするスピン状の急旋回までの範囲でパワステレバー(旋回入力具)の操作により機体旋回が可能となる。   The turning adjustment by the traveling transmission device 1 is performed by adjusting the transmission speed difference between the inner and outer sides determined according to the injection pressure to the double clutch mechanisms 10a and 10b within the deceleration range by the turning low speed gear 9b of the side clutch shaft 9. The aircraft can be turned with a corresponding turning radius. Specifically, from a gentle turn where the transmission speed on the inside of the turn is lower than the outside, a brake turn where the inside of the turn is a stop speed (zero speed), a predetermined speed in the direction opposite to the outside transmission system (for example, outside) The aircraft can be turned by operating the power steering lever (turning input tool) within a range up to a spin-like sudden turning that is 1/3 of the speed.

走行伝動装置1を伝動制御するための制御部31は、図3の入出力系統図に示すように、湿田切替を入力するための湿田モードスイッチ32、旋回力アップ操作を入力するための旋回力アップスイッチ33、旋回入力具の傾動操作を入力するためのパワステレバーポジションセンサ34、標準モードブレーキ圧を調節設定するための調整ダイヤル35、湿田モードブレーキ圧を調節設定するための調整ダイヤル36等を入力接続し、切替クラッチ10a,10bへの注入圧力を調節する調整ソレノイド36、右または左のサイドクラッチを係脱制御するためのプッシュシリンダソレノイド37a,37b等を出力接続する。   As shown in the input / output system diagram of FIG. 3, the control unit 31 for transmission control of the traveling transmission device 1 includes a wetland mode switch 32 for inputting wetland field switching, and a turning force for inputting a turning force up operation. An up switch 33, a power steering lever position sensor 34 for inputting the tilting operation of the turning input tool, an adjustment dial 35 for adjusting and setting the standard mode brake pressure, an adjustment dial 36 for adjusting and setting the wet field mode brake pressure, etc. An input connection is made, and an adjustment solenoid 36 for adjusting the injection pressure to the switching clutches 10a, 10b, a push cylinder solenoid 37a, 37b for engaging / disengaging the right or left side clutch, and the like are output-connected.

上記制御部31は、パワステレバーポジションセンサ34の信号と対応して調整ソレノイド36等を制御することにより、旋回入力具による左右方向のそれぞれの傾動操作角度に応じて切替クラッチ10a,10bへの注入圧力を変化させ、旋回内外速が略等しい直進速から内外速が逆方向の急旋回速までの範囲について、所定の伝動特性に沿って制御する。   The control unit 31 controls the adjusting solenoid 36 and the like in response to the signal of the power steering lever position sensor 34, thereby injecting the switching clutches 10a and 10b according to the respective tilting operation angles in the left and right directions by the turning input tool. The pressure is changed, and the range from the straight traveling speed at which the turning inner and outer speeds are substantially equal to the sudden turning speed in which the inner and outer speeds are in the reverse direction is controlled according to a predetermined transmission characteristic.

制御部による伝動制御特性について詳細に説明すると、図4の標準モードの伝動特性図に示すように、第一の伝動特性とその他の伝動特性を設定する。
第一の伝動特性は、切替クラッチ10a,10bへの注入圧力が、旋回入力具の所定の中立不感帯を除く中立角度位置Aiで旋回内側の直進ギヤ伝動圧力を低減する所定の初期圧Pi、所定の傾斜角度の中間角度位置A1で直進ギヤ伝動と旋回ギヤ伝動とが切替わる中間圧Pn、旋回入力具の操作限度近くの所定のブレーキ角度位置(旋回角度位置)Ab以上の最大角度位置Afまで所定の旋回圧、例えば、内側速度ゼロのブレーキ圧Pbとし、これら中立角度位置Aiからブレーキ角度位置Abの範囲で略一様に変化するパターンである。
The transmission control characteristic by the control unit will be described in detail. As shown in the transmission characteristic diagram of the standard mode in FIG. 4, the first transmission characteristic and other transmission characteristics are set.
The first transmission characteristic is that the injection pressure to the switching clutches 10a and 10b is a predetermined initial pressure Pi that reduces the straight gear transmission pressure inside the turning at a neutral angle position Ai excluding a predetermined neutral dead zone of the turning input device, a predetermined initial pressure Pi The intermediate pressure Pn at which the straight gear transmission and the turning gear transmission are switched at the intermediate angle position A1 of the inclination angle of the angle to the maximum angle position Af above the predetermined brake angle position (turning angle position) Ab near the operation limit of the turning input tool A predetermined turning pressure, for example, a brake pressure Pb with zero inner speed, is a pattern that changes substantially uniformly in a range from the neutral angle position Ai to the brake angle position Ab.

この第一の伝動特性により、中立角度位置Aiから中間角度位置Alまで、中間角度位置Alからブレーキ角度位置Abまでの範囲について、内外間の速度差と対応する旋回力が旋回入力具の傾動操作角度に応じてそれぞれ一様に変化し、ブレーキ角度位置Ab以上で一定に保持することにより、直進走行からブレーキ旋回等の所定の旋回動作までの間で機体を旋回走行することができる。   Due to this first transmission characteristic, the turning force corresponding to the speed difference between the inside and outside of the range from the neutral angle position Ai to the intermediate angle position Al, and from the intermediate angle position Al to the brake angle position Ab, the tilting operation of the turning input tool is performed. By changing each angle uniformly according to the angle and holding the brake angle position Ab or more constant, it is possible to turn the aircraft during a period from a straight running to a predetermined turning operation such as a brake turning.

第二の伝動特性は、旋回力アップスイッチ33のスイッチ操作による切替信号に基づいて切替え可能に構成する。この第二の伝動特性は、切替クラッチ10a,10bへの注入圧力が、ブレーキ角度位置Abで所定幅を増加した増加旋回圧、例えば、内外逆方向のスピン状旋回速となる所定の急旋回圧Psの注入圧力とし、中間角度位置A1からブレーキ角度位置Abまでの範囲で略一様に変化するとともに、ブレーキ角度位置Ab以上の最大角度位置Afまでの範囲で急旋回圧Psを越える最大旋回圧Pfとするパターンである。   The second transmission characteristic is configured to be switchable based on a switching signal generated by a switch operation of the turning force up switch 33. The second transmission characteristic is that the injection pressure to the switching clutches 10a and 10b is an increased turning pressure obtained by increasing a predetermined width at the brake angle position Ab, for example, a predetermined sudden turning pressure that becomes a spin-like turning speed in the reverse direction inside and outside. The injection pressure of Ps changes substantially uniformly in the range from the intermediate angular position A1 to the brake angular position Ab, and the maximum rotational pressure that exceeds the sudden rotational pressure Ps in the range from the brake angular position Ab to the maximum angular position Af The pattern is Pf.

この第二の伝動特性により、中立角度位置Aiから中間角度位置A1までの範囲においては第一の伝動特性と同様に旋回内側が直進速から駆動力ゼロとなるまで変化し、この中間角度位置A1からブレーキ角度位置Abまでの範囲では、旋回内側の伝動速度が駆動力ゼロの状態から増加された注入圧力が変化し、増加旋回圧を急旋回圧Psとした場合は、旋回力が連続的に増大して急旋回を含む小回り旋回走行制御に移行され、ブレーキ角度位置Abを越える角度範囲では急旋回速に保持される。   Due to this second transmission characteristic, in the range from the neutral angle position Ai to the intermediate angle position A1, the turning inside changes from the straight traveling speed to the driving force of zero as in the first transmission characteristic, and this intermediate angular position A1. In the range from the braking angle position Ab to the braking angle position Ab, the injection pressure increased from the state in which the transmission speed inside the turning is zero, and the turning force is continuously increased when the increased turning pressure is set to the sudden turning pressure Ps. It is increased to shift to small turning traveling control including sudden turning, and is maintained at a sudden turning speed in an angle range exceeding the brake angular position Ab.

したがって、上記構成の走行伝動装置により、中間角度位置における旋回力の急激な変動を招くことなく、旋回入力具の操作に応じてスムーズで操作性に優れる小回り旋回が可能となる。また、ブレーキ角度位置Abにおいて急旋回圧Psとすることにより、ブレーキ角度位置Abの前後で旋回内側の伝動速度の連続性が確保されるので、円滑な操作が可能となるとともに、旋回入力具の操作角度範囲と対応付けて機体を確実に急旋回動作することができる。   Therefore, the traveling power transmission device having the above-described configuration enables a small turn that is smooth and excellent in operability according to the operation of the turning input tool without causing a sudden change in the turning force at the intermediate angle position. Further, by setting the sudden turning pressure Ps at the brake angle position Ab, the continuity of the transmission speed inside the turning is ensured before and after the braking angle position Ab, so that smooth operation is possible and the turning input tool Corresponding to the operating angle range, it is possible to reliably perform the sudden turning operation of the aircraft.

このように、第一の伝動特性による旋回操作により旋回入力具の傾動操作に応じて直進走行から所謂ブレーキ旋回の範囲による比較的緩慢な旋回走行を行うことができ、この場合において、旋回力アップスイッチ33をオン操作することによって第二の伝動特性に変更され、操作性に優れる小回り旋回をオペレータが随時選択することができる。   As described above, the turning operation based on the first transmission characteristic can perform a relatively slow turning traveling in a range from straight traveling to the so-called brake turning according to the tilting operation of the turning input tool. When the switch 33 is turned on, the second transmission characteristic is changed, and the operator can select a small turn that is excellent in operability at any time.

次に、第三の伝動特性について説明する。この第三の伝動特性は、上記第二の伝動特性と同様に、第一の伝動特性についてスイッチ操作により切替可能に構成し、旋回内側の伝動速度が、前記第一の伝動特性の場合の駆動力ゼロとなる中間角度位置A1で別途設定の設定中間圧P1とする。ブレーキ角度位置Abでは旋回内外速が逆方向の急旋回圧Psとし、中立角度位置Aiから中間角度位置A1までの範囲および中間角度位置A1からブレーキ角度位置Abまでの範囲でそれぞれ略一様に変化するパターンである。上記設定中間圧P1は、調整ダイヤル35によってオペレータの好みに合わせて別途設定することができる。   Next, the third transmission characteristic will be described. The third transmission characteristic is configured so that the first transmission characteristic can be switched by a switch operation, similarly to the second transmission characteristic, and the driving speed when the transmission speed inside the turn is the first transmission characteristic is configured. The set intermediate pressure P1 is set separately at the intermediate angular position A1 where the force becomes zero. At the brake angle position Ab, the turning internal / external speed is set to the reverse sudden turning pressure Ps, and changes substantially uniformly in the range from the neutral angle position Ai to the intermediate angle position A1 and in the range from the intermediate angle position A1 to the brake angle position Ab. Pattern. The set intermediate pressure P1 can be set separately by the adjustment dial 35 according to the preference of the operator.

この第三の伝動特性は、中立角度位置Aiから中間角度位置A1までの範囲および中間角度位置A1からブレーキ角度位置Abまでの範囲で別途設定の設定中間圧P1による伝動特性に沿った旋回力の変化と対応して急旋回を含む小回り旋回が可能となる。したがって、上記構成の走行伝動装置により、小回り旋回走行制御における操作性を個々のオペレータの好みに対応させることができる。   The third transmission characteristic is that the turning force according to the transmission characteristic by the set intermediate pressure P1 set separately in the range from the neutral angle position Ai to the intermediate angle position A1 and in the range from the intermediate angle position A1 to the brake angle position Ab. Corresponding to the change, a small turn including a sudden turn is possible. Therefore, the traveling power transmission device configured as described above can make the operability in the small turn traveling control correspond to the preference of each operator.

次に、湿田モードにおける旋回力アップ制御について説明する。
湿田モードにおける伝動特性を図5に示すように、中立角度位置Aiで湿田モードの初期圧Pw、ブレーキ角度位置Abにおけるブレーキ圧が、湿田モードについて設定した閾値Ptを基準として、旋回力アップ設定圧未満Pb1であれば、標準モードのブレーキ圧Pbまで増加し、旋回力アップ設定圧以上Pb2であれば、所定の増加幅αを加えた圧力Pb3とする。
Next, the turning force up control in the wetland mode will be described.
As shown in FIG. 5, the transmission characteristics in the wet field mode are set to increase the turning force by setting the initial pressure Pw in the wet field mode at the neutral angle position Ai and the threshold pressure Pt set in the wet field mode as the reference. If it is less than Pb1, it increases to the brake pressure Pb in the standard mode, and if it is equal to or higher than the turning force up set pressure Pb2, the pressure Pb3 is set to a predetermined increase width α.

従来の構成による湿田モードにおいては、ブレーキ圧を低く調整した場合に、旋回力アップ時+αの圧力では旋回が困難な場合があり、また、+αの値を大きくすると、ブレーキ圧を高めに調整した場合は急激に旋回半径が小さくなり、ショックが発生することがあったが、上記構成とすることにより、湿田モードの弱ブレーキ調整状態において、パワステ操作量が大きい時は、旋回力アップを使用することで標準モードと類似したブレーキ力が得られるので、標準モードへの切替えを要することなく、スムーズに、かつ、確実な旋回が可能となることにより、湿田モードの条件適応性を向上することができる。
この場合において、標準モードの基準ブレーキ圧Pbと閾値Ptとの差を増加幅αとすることにより、連続的な操作性を確保することができる。
In the wet paddy mode with the conventional configuration, when the brake pressure is adjusted low, turning may be difficult when the turning force is increased with a pressure of + α, and when the value of + α is increased, the brake pressure is adjusted to be higher. In some cases, the turning radius suddenly decreases and a shock may occur. However, with the above configuration, when the power steering operation amount is large in the weak brake adjustment state in the wet paddy mode, the turning force increase is used. As a result, a braking force similar to that of the standard mode can be obtained, so that smooth and reliable turning is possible without requiring switching to the standard mode, thereby improving the adaptability of conditions in the wet paddy mode. it can.
In this case, continuous operability can be ensured by setting the difference between the reference brake pressure Pb in the standard mode and the threshold value Pt as the increase width α.

本発明の走行伝動装置の搭載例としてのコンバインの側面図である。It is a side view of the combine as a mounting example of the traveling transmission device of the present invention. 旋回調節部を備える走行伝動装置の展開断面図である。It is an expanded sectional view of a run transmission device provided with a turning adjustment part. 制御部の入出力系統図である。It is an input-output system diagram of a control part. 標準モードの伝動特性図である。It is a transmission characteristic figure of a standard mode. 湿田モードにおける伝動特性である。It is a transmission characteristic in the wet field mode.

1 走行伝動装置
8 サイドクラッチギヤ
9 サイドクラッチ軸
9a 高速ギヤ
9b 低速ギヤ
10a,10b 2連クラッチ機構(切替クラッチ)
11 2連クラッチ軸
12 デフケース
12c デフケースギヤ
31 制御部
33 旋回力アップスイッチ
34 パワステレバーポジションセンサ
35 調整ダイヤル
A1 中間角度位置
Ab ブレーキ角度位置(旋回角度位置)
Af 最大角度位置
Ai 中立角度位置
P1 設定中間圧
Pb ブレーキ圧(旋回圧)
Pf 最大旋回圧
Pi 初期圧
Pn 中間圧
Ps 急旋回圧(増加旋回圧)
DESCRIPTION OF SYMBOLS 1 Traveling power transmission device 8 Side clutch gear 9 Side clutch shaft 9a High speed gear 9b Low speed gear 10a, 10b Dual clutch mechanism (switching clutch)
11 Dual clutch shaft 12 Differential case 12c Differential case gear 31 Control unit 33 Turning force up switch 34 Power steering lever position sensor 35 Adjustment dial A1 Intermediate angle position Ab Brake angle position (turning angle position)
Af Maximum angle position Ai Neutral angle position P1 Set intermediate pressure Pb Brake pressure (turning pressure)
Pf Maximum turning pressure Pi Initial pressure Pn Intermediate pressure Ps Sudden turning pressure (Increase turning pressure)

Claims (1)

左右の伝動系の間の速度差をデフケース入力によって調節する差動機構と、そのデフケース入力を直進用の高速から旋回用の低速までの範囲で注入圧力に応じて伝動を切替える切替クラッチ(10a,10b)と、この切替クラッチ(10a,10b)への注入圧力を旋回入力具の旋回内側方向への傾動操作角度に応じて変化させる制御部とを備える走行伝動装置において、
上記制御部には、切替クラッチ(10a,10b)への注入圧力が、旋回入力具の所定の中立角度位置(Ai)から中間角度位置(Al)で旋回内外側が略同速とな初期圧(Pi)から中間圧(Pn)まで一様に圧力変化し、さらに所定の旋回角度位置(Ab)で所定の旋回速となる旋回圧(Pb)とし、中間角度位置(Al)から旋回角度位置(Ab)まで一様圧力変化し、旋回角度位置(Ab)から最大角度位置(Af)まで旋回圧(Pb)に保持する第一の伝動特性を設けるとともに、
スイッチ(33)操作により切替え可能な第二、第三の伝動特性を設け、
二の伝動特性は、上記中立角度位置(Ai)で上記初期圧(Pi)、上記第一の伝動特性にいて切替クラッチ(10a,10b)の伝動が切替わる中間角度位置(Al)で伝動切替えの中間圧(Pn)、上記旋回角度位置(Ab)で上記旋回圧(Pb)より所定幅を増加した急旋回圧(Ps)とし、これら中立角度位置(Ai)から中間角度位置(Al)までの範囲および中間角度位置(Al)から旋回角度位置(Ab)までの範囲で夫々一様に変化し、旋回角度位置(Ab)を超える操作角度範囲では上記急旋回圧(Ps)をえる最大旋回圧(Pf)に保持する特性であり、
第三の伝動特性は、中立角度位置(Ai)における初期圧(Pi)から中間角度位置(A1)における設定中間圧(P1)までの範囲および中間角度位置(A1)における設定中間圧(P1)から旋回角度位置(Ab)における急旋回圧(Ps)までの範囲で夫々一様に変化し、前記中間角度位置(Al)での圧力を、調整ダイヤル(35)で任意に設定される前記中間圧(Pn)よりも高い設定中間圧(Pl)として、前記第一の伝動特性よりも旋回力が増加する特性としたことを特徴とする走行伝動装置
A differential mechanism that adjusts the speed difference between the left and right transmission systems by a differential case input, and a switching clutch (10a, 10a, 10) that switches the transmission according to the injection pressure in the range from the high speed for straight travel to the low speed for rotation. 10b), and a traveling transmission device including a control unit that changes the injection pressure to the switching clutch (10a, 10b) according to the tilting operation angle of the turning input tool in the turning inner direction.
The aforementioned control unit, the initial pressure injection pressure to switching clutch (10a, 10b) are substantially the same speed preparative ing turning the outside predetermined neutral angular position of the turning input implement from (Ai) at an intermediate angular position (Al) The pressure changes uniformly from (Pi) to the intermediate pressure (Pn), and the turning pressure (Pb) at which the turning speed reaches the predetermined turning speed at the predetermined turning angle position (Ab), and the turning angle position from the intermediate angle position (Al). and the pressure change in the uniform up (Ab), provided with a first transmission characteristic to hold the turning pressure from the pivot angle position (Ab) to the maximum angular position (Af) (Pb),
The second and third transmission characteristics that can be switched by operating the switch (33) are provided.
The second transmission characteristic, in the neutral angular position (Ai) at the initial pressure (Pi), an intermediate angular position transmission is switched in the switching clutch have you to the first transmission characteristic (10a, 10b) (Al) An intermediate pressure (Pn) for transmission switching, and a sudden turning pressure (Ps) having a predetermined width increased from the turning pressure (Pb) at the turning angle position (Ab). From the neutral angle position (Ai) to the intermediate angle position (Al ) to each uniformly varies in the range and scope of the intermediate angular position (Al) to pivot angle position (Ab) of said steep turn pressure in the operating angle range exceeding the turning angular position (Ab) to (Ps) ultra a characteristic that holds the maximum turning pressure (Pf) to obtain,
The third transmission characteristic is the range from the initial pressure (Pi) at the neutral angle position (Ai) to the set intermediate pressure (P1) at the intermediate angle position (A1) and the set intermediate pressure (P1) at the intermediate angle position (A1) . turning angular position (Ab) changes each uniformly in the range up to sudden turning pressure (Ps) in the said intermediate said pressure in the intermediate angular position (Al), is set arbitrarily adjust dial (35) A traveling transmission device characterized in that the set intermediate pressure (Pl) higher than the pressure (Pn) has a characteristic that the turning force increases more than the first transmission characteristic .
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001055159A (en) * 1999-08-19 2001-02-27 Yanmar Agricult Equip Co Ltd Moving agricultural machine
JP2003104228A (en) * 2001-10-02 2003-04-09 Iseki & Co Ltd Traveling device
JP2003118627A (en) * 2001-10-12 2003-04-23 Iseki & Co Ltd Body steering device for traveling vehicle
JP2003267255A (en) * 2002-03-15 2003-09-25 Iseki & Co Ltd Traveling and transmission device of combine
JP2004026029A (en) * 2002-06-26 2004-01-29 Iseki & Co Ltd Travel device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001055159A (en) * 1999-08-19 2001-02-27 Yanmar Agricult Equip Co Ltd Moving agricultural machine
JP2003104228A (en) * 2001-10-02 2003-04-09 Iseki & Co Ltd Traveling device
JP2003118627A (en) * 2001-10-12 2003-04-23 Iseki & Co Ltd Body steering device for traveling vehicle
JP2003267255A (en) * 2002-03-15 2003-09-25 Iseki & Co Ltd Traveling and transmission device of combine
JP2004026029A (en) * 2002-06-26 2004-01-29 Iseki & Co Ltd Travel device

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