JPH10218002A - Combine steering controller for dry and wet fields - Google Patents

Combine steering controller for dry and wet fields

Info

Publication number
JPH10218002A
JPH10218002A JP403598A JP403598A JPH10218002A JP H10218002 A JPH10218002 A JP H10218002A JP 403598 A JP403598 A JP 403598A JP 403598 A JP403598 A JP 403598A JP H10218002 A JPH10218002 A JP H10218002A
Authority
JP
Japan
Prior art keywords
shaft
transmission
steering
clutch
turning
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.)
Granted
Application number
JP403598A
Other languages
Japanese (ja)
Other versions
JP2977788B2 (en
Inventor
Teruo Minami
照男 南
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
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Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP10004035A priority Critical patent/JP2977788B2/en
Publication of JPH10218002A publication Critical patent/JPH10218002A/en
Application granted granted Critical
Publication of JP2977788B2 publication Critical patent/JP2977788B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Guiding Agricultural Machines (AREA)
  • Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)

Abstract

PROBLEM TO BE SOLVED: To select a form at steering that an inner side running device is driven by reduction or is driven reversely by providing two transmission systems which transmit power from a first shaft to a second shaft in a condition of forward rotation and in a condition of reverse rotation and transmitting power from the second shaft to steering devices on the right and left independently. SOLUTION: A running controller provided in a crawler type running device of a combine has a first shaft 15, a second shaft 16, and a steering clutch shaft 17 which are arranged in this order in a transmission case 5. Moreover, an input gear 18 to which the power from output gears 13a, 14a on a first gear change shaft 13 and a second gear change shaft 14 is transmitted is fitted in the first shaft 15 externally. The running controller has a first transmission system in which an endless turning belt 21 is wound around sprockets 19, 20 on the first and second shafts 15, 16. Furthermore, it has a second transmission system consisting of a gear transmission mechanism 22 having gears 22a, 22b on the first and second shafts 15, 16. It is provided with hydraulic clutches 23, 24 provided in each transmission system, and a clutch gear 25 is supported on the steering clutch shaft 17 in idle rotation to enable steering in a plurality of forms.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は作業車の操向制御装
置に関し、詳しくは、操向操作時に左右一対の走行操作
のうち旋回内側の走行装置の駆動形態を変更するよう構
成された作業車の操向制御装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering control device for a work vehicle, and more particularly, to a work vehicle configured to change the drive mode of a traveling device inside a turn of a pair of left and right traveling operations during a steering operation. The present invention relates to a steering control device.

【0002】[0002]

【従来の技術】従来、上記の如く構成された操向制御装
置としては、例えば、実開昭62‐187324号公報
に示されるもののように、操向操作時には旋回内側の走
行装置に対する駆動力の伝動を遮断する、あるいは、旋
回内側の走行装置を制動状態に設定することで、夫々操
向操作時には異なる旋回半径を得るよう構成されている
ものが存在する。
2. Description of the Related Art Conventionally, as a steering control device configured as described above, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-187324, a driving force applied to a traveling device inside a turn during a steering operation is known. There is a configuration in which the transmission is interrupted or the traveling device inside the turn is set to a braking state, so that a different turning radius is obtained at the time of the steering operation.

【0003】[0003]

【発明が解決しようとする課題】ここで、前記引例のよ
うに、伝動の遮断と制動との選択によって異なる旋回半
径を得ようとするものでは、例えば、泥土状の圃場、あ
るいは、舗装された路面のように、走行条件の異なる場
合には、得られる旋回半径の値が大きく食い違う現象を
生じやすい。特に、舗装された路面において、一方の走
行装置に対する伝動を遮断しただけでは、遮断された側
の走行装置が遊転状態で回動するため、殆んど直進に近
い走行状態を呈することもある。そこで、どのような走
行条件下においても所望の旋回半径を得るため、大きい
半径で旋回したい場合には旋回内側の走行装置の駆動速
度を減じ、小さい半径で旋回したい場合には、旋回内側
の走行操作を逆転させるよう駆動系を構成することも考
えられるが、このように駆動系を構成しょうとすると、
従来の技術では、左右の走行装置夫々に対して油圧モー
タを備える伝動系の採用等、構造が複雑になるばかりで
無く、コスト高に繋がりやすく改善の余地を残す。本発
明の目的は、合理的な構成によって、操向操作時には、
旋回内側の走行装置を減速駆動する形態と、逆転駆動す
る形態とを選択できる操向制御装置を得る点にある。
Here, in the case of obtaining a different turning radius by selecting transmission interruption and braking as in the above-mentioned reference, for example, a muddy field or a pavement is used. When the running conditions are different, such as on a road surface, a phenomenon in which the value of the obtained turning radius is large is likely to occur. Particularly, on a paved road surface, if the transmission to one traveling device is merely interrupted, the traveling device on the interrupted side rotates in an idle state, so that the traveling state may be almost almost straight. . Therefore, in order to obtain a desired turning radius under any running conditions, the driving speed of the traveling device inside the turning is reduced when turning with a large radius, and the driving inside the turning is required when turning with a small radius. It is conceivable to configure the drive system to reverse the operation, but if you try to configure the drive system in this way,
In the prior art, not only the structure becomes complicated, such as adoption of a transmission system having a hydraulic motor for each of the left and right traveling devices, but it also leads to high cost and leaves room for improvement. The object of the present invention is to provide a reasonable configuration,
It is a feature of the present invention to provide a steering control device capable of selecting a mode in which the traveling device inside the turn is decelerated and a mode in which the traveling device is driven in reverse.

【0004】[0004]

【課題を解決するための手段】本発明の特徴は、第1軸
からの動力を、無端回動帯、及び、クラッチを介して正
転状態で第2軸に伝える伝動系と、第1軸からの動力
を、ギヤ伝動機構、及び、クラッチを介して逆転状態で
第2軸に伝える伝動系とが形成されると共に、第2軸か
らの動力を左右の操向装置に対して独立に伝える操向ク
ラッチが備えられて成る点にあり、その作用、及び、効
果は次の通りである。
SUMMARY OF THE INVENTION A feature of the present invention is that a power transmission system for transmitting power from a first shaft to a second shaft in a forward rotation state via an endless rotating band and a clutch, and a first shaft. And a transmission system for transmitting the power from the second shaft to the second shaft in a reverse rotation state via a clutch, and independently transmitting the power from the second shaft to the left and right steering devices. The steering clutch is provided, and its operation and effects are as follows.

【0005】〔作 用〕上記特徴を例えば図1に示すよ
うに構成すると、無端回動帯21からの動力を伝えるク
ラッチ23を伝動状態に設定し、かつ、第2軸16から
の動力を一方の走行装置1に伝えるよう、操向クラッチ
Cを操作することで、この走行装置1は減速駆動され、
又、ギヤ伝動機構22からの動力を伝えるクラッチ24
を伝動状態に設定し、かつ、前述と同様に、クラッチ2
4からの動力を一方の走行装置1に伝えるよう、操向ク
ラッチCを操作することで、この走行装置1は逆転駆動
される。つまり、第1軸15の動力を正転状態、及び、
逆転状態のいずれかに選択して第2軸16に伝えるよ
う、無端回動帯21、ギヤ伝動機構22、2つのクラッ
チ23,24を設けることで、回転方向の切換が可能と
なると共に、無端回動帯21の伝動地、ギヤ伝動機構2
2の伝動比を予め適当に設定することで、旋回内側の走
行装置1を減速駆動できる。
[Operation] If the above-mentioned feature is constituted, for example, as shown in FIG. 1, the clutch 23 for transmitting the power from the endless rotating band 21 is set to the transmitting state, and the power from the second shaft 16 is applied to one side. By operating the steering clutch C so that the traveling device 1 is transmitted to the traveling device 1, the traveling device 1 is decelerated and driven.
A clutch 24 for transmitting the power from the gear transmission mechanism 22
Is set to the transmission state, and the clutch 2
By operating the steering clutch C to transmit the power from the driving device 4 to the traveling device 1, the traveling device 1 is driven to rotate in the reverse direction. That is, the power of the first shaft 15 is changed to the normal rotation state, and
By providing an endless rotating band 21, a gear transmission mechanism 22, and two clutches 23 and 24 so as to select one of the reverse rotation states and transmit the rotation to the second shaft 16, the rotation direction can be switched, and the endless rotation band is provided. Transmission ground of rotating belt 21, gear transmission mechanism 2
By appropriately setting the transmission ratio of 2 in advance, the traveling device 1 inside the turn can be driven at a reduced speed.

【0006】〔発明の効果〕従って、従来からの装置に
対して、第2軸に相当する軸の付加と、チェーン等の無
端回動帯、ギヤ伝動系等の付加とによって、操向操作時
には旋回内側の走行装置を減速駆動する形態と、逆転駆
動する形態とを選択できる操向制御装置が比較的簡単な
構造で得られたのである。
[Effects of the Invention] Accordingly, the conventional apparatus has an additional shaft corresponding to the second shaft, an endless rotating band such as a chain, a gear transmission system, and the like. A steering control device capable of selecting between a mode in which the traveling device inside the turn is decelerated and a mode in which the traveling device is driven in reverse is obtained with a relatively simple structure.

【0007】[0007]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図8に示すように、左右一対のク
ローラ型の走行装置1,1を備えた車体2に脱穀装置3
を搭載し、又、車体2の前端に刈取前処理部4を昇降自
在に連結し、更に、この刈取前処理部4の右側に位置す
る車体前部に運転部Aを形成して、作業車の一例として
のコンバインが構成されている。同図に示す如く、走行
装置位置は駆動スプロケット1a、多数の遊転輪1b
‥、これらに巻回するクローラベルト1c夫々で成り、
又、駆動スプロケット1aは車体の左右中央に配置され
た伝動ケース5からの動力が伝えられるよう伝動系が形
成されている。図1に示すように、伝動ケース5にはエ
ンジン(図示せず)からの動力が入力プーリ6を介して
伝えられる入力軸7、この入力軸7に外嵌した出力ギヤ
8からの動力が、その軸に外嵌したシフトギヤ9を介し
て伝えられるシフタ軸10、シフタ軸10のシフトギヤ
9からの動力が、その軸に外嵌した3つのギヤ11‥の
いずれかに伝えられる中間軸12、この中間軸12から
の動力が各々伝えられると共に、各々入力ギヤG1 ,G
2 ,G3 , Gb を有する変速用クラッチB1 ,B 2 ,B
3 ,Bb が外嵌された第1,第2変速軸13,14夫々
で主変速系が構成され、この伝動ケース5では、この主
変速系からの動力を減速状態、逆転状態のいずれかの状
態で左右の走行装置1, 1のうちの一方に伝える、ある
いは、左右の走行装置1,1のうちの一方に制動力を作
用させるよう構成された走行制御装置が備えられてい
る。即ち、走行制御装置は伝動ケース5の中央位置から
下方に亘って順次配置された第1軸15、第2軸16、
操向クラッチ軸17、及び、前記第1、第2変速軸1
3, 14夫々に設けられた出力ギヤ13a,14aから
の動力が伝えられるよう第1軸15に外嵌した入力ギヤ
18、第1軸15と第2軸16とに設けたスプロケット
19,20にチェーンで成る無端回動帯21を巻回して
成る伝動系、第1軸15と第2軸16とに設けたスプロ
ケット19,20にチェーンで成る無端回動帯21を巻
回して成る伝動系、第1軸15と第2軸16とに設けた
ギヤ22a,22bを有するギヤ伝動機構22で成る伝
動系、これら2つの伝動系夫々に介装された油圧クラッ
チ23,24、操向クラッチ軸17の中央に遊転支承さ
れ、第1軸15の入力ギヤ18に咬合するクラッチギヤ
25、このクラッチギヤ25の左右位置の操向クラッチ
軸17)に外嵌されたクラッチスリーブ26,26、第2
軸16からの動力を夫々のクラッチスリーブ26,26
の外側位置に伝える2組のギヤ連動部27,27、クラ
ッチスリーブ26,26を操作するシフトフォーク2
8,28、第2軸16に制動力を作用させる油圧ブレー
キ29各々を備えて構成され、又、伝動ケース5の下端
部には走行装置1, 1夫々の駆動スプロケット1a,1
aに連結する駆動軸30,30が支承されると共に、こ
の駆動軸30,30の内端部にはクラッチスリーブ2
6,26のギヤ部と咬合するギヤ31,31が備えられ
ている。そして、操向操作を行う場合には後述する油圧
系の操作によって前記2つの油圧クラッチ23,24あ
るいは油圧ブレーキ29のうちの1つを選択すると共
に、左右のシフトフォーク28,28のうちの一方を操
作することで、クラッチスリーブ26は、図1では左側
に示されるもののように前記ギヤ連動部27を介して第
2軸16と連結状態に達し、この側の走行装置1に対し
ては、減速状態の動力が伝えられる、あるいは、逆転状
態の動力が伝えられる、あるいは、制動力が作用するよ
うになっている。尚、クラッチギヤ25、クラッチスリ
ーブ26,26、ギヤ連動部27,27夫々を併せて操
向クラッチC,Cと称し、又、前記のように入力プーリ
6を介して入力軸7に伝えられた動力は油圧ポンプ32
を駆動すると共に、2つの軸33,34を介して、前記
刈取前処理部4に動力を伝えるための出力プーリ35を
駆動し、又、前記4つの変速用クラッチB1 ,B2 ,B
3 ,Bb は前進3速、及び、後進1速の変速を行い、第
1変速軸13)には機械式の駐車ブレーキ36が設けられ
ている。又、この伝動ケース5の内部の伝動系は第2図
に示す如く、前後方向でのギヤの重複配置によって、上
下方向の寸法の縮少を図ってあり、又、図3に示すよう
に、前記走行制御装置の組立てを楽に行えるよう、伝動
ケース5の左右側部に開口が形成され、かつ、この開口
を閉じるための蓋体5a,5aが備えられている。図3
に示すように、前記シフトフォーク28,28の操作軸
28a,28a夫々の伝動ケース5の外端部には操作ア
ーム37,37が取付けられ、又、これらの操作アーム
37,37を操作するためのピストン38,38を収め
たケース39が伝動ケース5の前面に取付けられ、この
ピストン38,38及び前記4つの変速用クラッチ
1 ,B2 ,B3 ,Bb 、2つの油圧クラッチ23,2
4、油圧ブレーキ29を制御するための系は第4図の如
く表わされる。つまり、前記油圧ポンプ32からの作動
油は変速制御弁40を介して変速用クラッチB1
2 ,B3 ,Bb 夫々に供給され、かつ、同様に、操向
制御弁41を介して前記ピストン38,38に供給さ
れ、又、38,38を収めるシリンダ38a,38aか
らの作動油が操向モード切換弁42を介して2つの油圧
クラッチ23,24及び油圧ブレーキ29に供給され
る。尚、変速制御弁40は伝動ケース5の側部に備えら
れ、操向制御弁41はロータリ型に構成されると共に前
記ケース39に備えられ、操向モード切換弁42は前記
蓋体5aに備えられ、変速制御弁40は前記運転部Aに
設けた変速レバー43と連係し、又、運転部Aに設けた
操向レバー44の左右操作で操向制御弁41を操作し、
操向レバー44のレバー軸芯に沿うシフト操作で操向モ
ード切換弁42を操作するよう夫々が連係されている。
又、前記操向制御弁41は、図5乃至図7に示す弁本体
41aに油圧ポンプ32からの圧油が供給される第1環
状溝45、円弧状に形成された2つの円弧状溝46,4
6、これら円弧状溝46,46に挟まれた位置に屈曲状
態で形成された第2環状溝47、排油溝48と連通する
状態で形成された第3環状溝49夫々を、その外面に有
し、又、2つの円弧状溝46,46は第1環状溝45と
油路孔50を介して連通している。第2環状溝47と図
6に示す操作位置での排油溝48とは油路孔51を介し
て排油系に連通し、弁本体41aの回動操作によって2
つの円弧状溝46,46のうちの一方からの圧油がいず
れか一方のシリンダ部38a,38aに供給されるよう
油路51,52が形成され、シリンダ部38a,38a
の壁部から引き出された油路53が前述のように、操向
モード切換弁42に供給され、この油路53から分岐し
た油路54が前記第3環状溝49と連通している。そし
て、操向操作時には弁本体41aの回動操作によってい
ずれか一方のピストン38が動作した後、弁本体41a
を更に回動操作することで排油溝48から流れ出す作動
油の量が徐々に抑制される結果、前記2つの油圧クラッ
チ23,24あるいは油圧ブレーキ29に対する作動油
圧が徐々に上昇して円滑に操向動作を行えるようになっ
ているのである。尚、図1に示す如く前記ピストン3
8,38がストロークエンドまで動作しても、クラッチ
スリーブ26,26は外側に位置するベアリング等と接
触しないよう動作ストロークが設定されている。
Embodiments of the present invention will be described below with reference to the drawings.
It will be described based on. As shown in FIG.
A threshing device 3 is mounted on a vehicle body 2 having roller-type traveling devices 1 and 1.
And a cutting pre-processing unit 4 at the front end of the vehicle body 2.
At the right side of the pre-cutting unit 4.
A driving section A is formed at the front of the vehicle body,
Combines are configured. As shown in FIG.
The device position is the drive sprocket 1a, many idler wheels 1b
‥, each composed of a crawler belt 1c wound around these,
Further, the driving sprocket 1a is disposed at the center on the left and right of the vehicle body.
The transmission system is shaped so that the power from the transmission case 5 can be transmitted.
Has been established. As shown in FIG.
Power from the engine (not shown) is input via the input pulley 6
The input shaft 7 to be transmitted, and the output gear externally fitted to the input shaft 7
8 from a shift gear 9 externally fitted to the shaft.
Shifter shaft 10 and shift gear of shifter shaft 10
9 from the three gears 11 #
Intermediate shaft 12 transmitted to either, from this intermediate shaft 12
Power is transmitted to each input gear G1, G
Two, GThreeTransmission clutch B having1, B Two, B
Three, Bb externally fitted to the first and second transmission shafts 13, 14 respectively.
The transmission case 5 forms the main transmission system.
The power from the transmission is decelerated or reversed.
State to one of the left and right traveling devices 1, 1
Alternatively, a braking force is applied to one of the left and right traveling devices 1, 1.
A travel control device configured to
You. That is, the traveling control device starts from the center position of the transmission case 5.
A first shaft 15, a second shaft 16, which are sequentially arranged below,
Steering clutch shaft 17 and the first and second transmission shafts 1
From the output gears 13a and 14a provided on the 3 and 14, respectively.
Input gear externally fitted to the first shaft 15 so that the power of
18, a sprocket provided on the first shaft 15 and the second shaft 16
19 and 20 are wound around an endless rotating band 21 made of a chain.
A transmission system provided on the first shaft 15 and the second shaft 16
An endless swivel band 21 made of a chain is wound around the brackets 19 and 20.
A rotating transmission system, provided on the first shaft 15 and the second shaft 16
A transmission comprising a gear transmission mechanism 22 having gears 22a and 22b.
Hydraulic system, hydraulic clutches interposed in each of these two transmission systems.
Hidden bearings 23, 24 and a free-rotation support are provided at the center of the steering clutch shaft 17.
And a clutch gear that meshes with the input gear 18 of the first shaft 15.
25, a steering clutch at the left and right positions of the clutch gear 25
The clutch sleeves 26, 26 externally fitted to the shaft 17), the second
The power from the shaft 16 is transferred to the respective clutch sleeves 26, 26.
Two sets of gear interlocking parts 27, 27,
Shift fork 2 for operating switch sleeves 26, 26
8, 28, a hydraulic brake for applying a braking force to the second shaft 16
And lower end of the transmission case 5
The driving devices 1, 1 each have a drive sprocket 1a, 1
a and the drive shafts 30, 30 connected to the
The clutch sleeve 2 is provided at the inner end of the drive shafts 30,
Gears 31 that engage with the gear portions 6 and 26 are provided.
ing. When the steering operation is performed, a hydraulic pressure described later is used.
The two hydraulic clutches 23, 24
Or selecting one of the hydraulic brakes 29
Then, one of the left and right shift forks 28, 28 is operated.
By operating the clutch sleeve 26, the left side in FIG.
Through the gear interlocking portion 27 as shown in FIG.
It reaches the state of connection with the two shafts 16 and the traveling device 1 on this side
The power in the deceleration state is transmitted or
State power is transmitted, or braking force is applied.
Swelling. In addition, the clutch gear 25, the clutch
Gears 26, 26 and gear interlocking units 27, 27, respectively.
Directional clutches C and C.
The power transmitted to the input shaft 7 through the hydraulic pump 32
And, via two shafts 33 and 34,
An output pulley 35 for transmitting power to the pre-cutting unit 4
Drive and the four shift clutches B1, BTwo, B
Three, Bb perform the third forward speed and the first reverse speed.
A mechanical parking brake 36 is provided on one transmission shaft 13).
ing. The transmission system inside the transmission case 5 is shown in FIG.
As shown in the figure above, due to the overlapping arrangement of gears in the front-rear direction,
The size in the downward direction is reduced, and as shown in FIG.
In order to facilitate the assembly of the travel control device,
Openings are formed on the left and right sides of the case 5, and the openings
Are provided for closing the cover. FIG.
As shown in FIG.
At the outer end of the transmission case 5 of each of the
Arms 37, 37 are attached, and
Contains pistons 38, 38 for operating 37, 37
Case 39 is attached to the front surface of the transmission case 5.
Pistons 38, 38 and the four shift clutches
B1, BTwo, BThree, Bb, two hydraulic clutches 23, 2
4. The system for controlling the hydraulic brake 29 is as shown in FIG.
Is represented. That is, the operation from the hydraulic pump 32
The oil is supplied to the transmission clutch B via the transmission control valve 40.1,
BTwo, BThree, Bb respectively supplied and, similarly, steering
It is supplied to the pistons 38, 38 via a control valve 41.
And the cylinders 38a, 38a for containing 38, 38
These hydraulic oils are supplied to two hydraulic pressures via the steering mode switching valve 42.
Supplied to the clutches 23 and 24 and the hydraulic brake 29.
You. The transmission control valve 40 is provided on the side of the transmission case 5.
The steering control valve 41 is of a rotary type and
The steering mode switching valve 42 is provided in the case 39.
The shift control valve 40 is provided on the lid 5a,
It is linked to the provided shift lever 43 and is provided in the driving section A.
The steering control valve 41 is operated by operating the steering lever 44 left and right,
A steering operation is performed by a shift operation along the lever axis of the steering lever 44.
Each is linked to operate the mode switching valve 42.
The steering control valve 41 is a valve body shown in FIGS.
A first ring in which pressure oil from the hydraulic pump 32 is supplied to 41a
Groove 45, two arc-shaped grooves 46, 4 formed in an arc shape
6, bent at the position between these arc-shaped grooves 46, 46
Communicates with the second annular groove 47 and the oil drain groove 48 formed in a state.
Each of the third annular grooves 49 formed in the state is provided on the outer surface thereof.
Also, the two arc-shaped grooves 46, 46 are connected to the first annular groove 45.
It communicates via an oil passage hole 50. Second annular groove 47 and figure
The oil discharge groove 48 at the operation position shown in FIG.
To communicate with the oil drainage system, and by rotating the valve body 41a,
Pressure oil from one of the two arc-shaped grooves 46
So as to be supplied to one of the cylinder portions 38a, 38a.
Oil passages 51 and 52 are formed, and the cylinder portions 38a and 38a
As described above, the oil passage 53 drawn from the wall of the
The oil is supplied to the mode switching valve 42 and is branched from the oil passage 53.
The oil passage 54 communicates with the third annular groove 49. Soshi
Therefore, during the steering operation, the rotation of the valve body 41a is not required.
After one of the pistons 38 is operated, the valve body 41a
The operation of flowing out from the oil drain groove 48 by further rotating the
As a result of the oil amount being gradually reduced, the two hydraulic
Hydraulic oil for switches 23 and 24 or hydraulic brake 29
The pressure gradually rises and the steering operation can be performed smoothly.
-ing Incidentally, as shown in FIG.
Even if 8, 38 operates to the stroke end, the clutch
The sleeves 26, 26 are in contact with outer bearings and the like.
The operation stroke is set so as not to touch.

【0008】〔別実施形態〕本発明は上記実施例以外
に、ハーベスタあるいは多輪型の作業車に適用して良
く、又、この実施例では無端回動帯の系からの動力を前
進動力として用いていたが、この系からの動力を逆転動
力として用いるよう構成しても良い。
[Other Embodiments] The present invention may be applied to a harvester or a multi-wheel type work vehicle other than the above-described embodiment. In this embodiment, the power from the endless rotating belt system is used as forward power. Although used, the power from this system may be used as the reverse rotation power.

【0009】尚、特許請求の範囲の項に図面との対照を
便利にする為に符号を記すが、該記入により本発明は添
付図面の構成に限定されるものではない。
In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

【図面の簡単な説明】[Brief description of the drawings]

【図1】伝動ケースの断面図FIG. 1 is a sectional view of a transmission case.

【図2】伝動ケース内の伝動系を表わす側面図FIG. 2 is a side view showing a transmission system in a transmission case.

【図3】操向操作系を表わす正面図FIG. 3 is a front view showing a steering operation system.

【図4】油圧回路図FIG. 4 is a hydraulic circuit diagram

【図5】ピストンに対する油路を表わす概略図FIG. 5 is a schematic diagram showing an oil passage for a piston.

【図6】操向制御弁を表わす側面図FIG. 6 is a side view showing a steering control valve.

【図7】排油溝等を表わす断面図FIG. 7 is a sectional view showing an oil drain groove and the like.

【図8】コンバイン前部の側面図FIG. 8 is a side view of the front of the combine.

【符号の説明】[Explanation of symbols]

1 走行装置 15 第1軸 16 第2軸 21 無端回動帯 22 ギヤ伝動機構 23 クラッチ 24 クラッチ C 走行クラッチ DESCRIPTION OF SYMBOLS 1 Traveling device 15 1st shaft 16 2nd shaft 21 Endless rotation band 22 Gear transmission mechanism 23 Clutch 24 Clutch C Travel clutch

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成10年2月12日[Submission date] February 12, 1998

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】全文[Correction target item name] Full text

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【書類名】 明細書[Document Name] Statement

【発明の名称】 コンバインの乾田・湿田用操向制御
装置
[Title of the Invention] Combine steering controller for dry and wet fields

【特許請求の範囲】[Claims]

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明はクローラ式走行装置
を備えたコンバインの操向制御装置に係り、詳しくは、
操向操作時における旋回内側の走行装置の駆動形態を種
々に変更できるように構成する技術に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering control device for a combine equipped with a crawler-type traveling device.
The present invention relates to a technique for changing the driving mode of a traveling device inside a turn at the time of a steering operation in various ways.

【0002】[0002]

【従来の技術】従来、この種のコンバインの操向制御装
置としては、例えば、実開昭62−187324号公報
に示されているように、操向操作時には旋回内側のクロ
ーラ式走行装置に対する駆動力の伝動を遮断しての片駆
動旋回(クラッチターン)、あるいは、制動状態にして
の制動旋回(ブレーキターン)を設定可能としたものが
存在する。
2. Description of the Related Art Conventionally, as a steering control device for a combine of this type, for example, as shown in Japanese Utility Model Laid-Open Publication No. Sho 62-187324, a drive for a crawler-type traveling device inside a turn during steering operation is disclosed. There is a type in which one-sided turning (clutch turn) in which power transmission is interrupted or braking turning (brake turn) in a braking state can be set.

【0003】[0003]

【発明が解決しようとする課題】コンバインの収穫作業
は、実際に稲、麦を刈取る時間に対して、刈取りを行わ
ない方向転換をしている時間の割合が多く、その方向転
換では前進と後進との繰返しによるスイッチバックター
ンが大半である。又、湿田での収穫作業から乾田での収
穫作業迄、路面条件が多様であるという特質がある。以
上の特質に対して、従来のクラッチ・ブレーキターンで
は、圃場の土質によってはクローラがスリップして旋回
半径が大きくなり、条合わせ操作が難しくなるとか、制
動ロックされて停止したクローラのスリップによってラ
グが土を削り、圃場を荒らして刈取作業を難しくしてし
まうことがある。又、旋回内側のクローラには駆動力が
ないため、駆動側である旋回外側のクローラだけがスリ
ップし、湿田土壌での旋回性が悪いという問題もあり、
前述したコンバインの収穫作業の特質に十分対応し難い
点で改善の余地が残されているものであった。本発明の
目的は、上記の問題点を解決してコンバインの収穫作業
の特質に十分対応できる新しい操向制御装置を提供する
ことにある。
In the harvesting work of the combine, the ratio of the time of turning without cutting is large relative to the time of actually cutting rice and wheat. Most of them are switchback turns due to repetition of reverse. In addition, there is a characteristic that road surface conditions are various from harvesting work in wet fields to harvesting work in dry fields. In contrast to the above characteristics, in the conventional clutch / brake turn, depending on the soil quality of the field, the crawler slips and the turning radius becomes large, making it difficult to perform the alignment operation. However, there is a case where the soil is cut and the field is smashed to make the harvesting operation difficult. Also, since there is no driving force on the crawler inside the turning, only the crawler outside the turning, which is the driving side, slips, and there is a problem that the turning property on wetland soil is poor,
There is room for improvement in that it is difficult to sufficiently cope with the characteristics of the combine harvesting operation described above. An object of the present invention is to solve the above-mentioned problems and to provide a new steering control device which can sufficiently cope with the characteristics of the combine harvesting operation.

【0004】[0004]

【課題を解決するための手段】上記目的を達成するため
に本発明は、車体に脱穀装置を搭載し、車体の前端側に
刈取前処理部を昇降自在に連結し、左右一対の駆動輪体
に対する伝達動力を各別に断続又は増減して機体操向を
行うように構成されたクローラ式走行装置を備え、エン
ジン側からの伝達動力が入力されるミッションを内装し
た単一の伝動ケース内に、前記左右の駆動輪体に対する
伝達動力をその回転方向を変えずに等速で両側のクロー
ラ式走行装置に伝動する正転等速駆動機構と、前記左右
の駆動輪体に対する伝達動力をその回転方向を変えずに
減速して旋回内側のクローラ式走行装置に伝動する正転
減速機構と、伝達動力をその回転方向を逆方向に変換し
て旋回内側のクローラ式走行装置に伝動する逆転伝動機
構とを備えるとともに、前記正転減速機構と前記逆転伝
動機構とを択一選択して作動態勢に切換る旋回モード切
換手段を備え、さらに、左右のクローラ式走行装置の伝
動系に対する前記旋回モード切換手段によって作動態勢
に切り換えられた機構側からの出力の伝達を断って、左
右のクローラ式走行装置の両方の伝動系に前記正転等速
駆動機構側からの出力を伝達する直進走行状態と、左右
のクローラ式走行装置のうちの一方のクローラ式走行装
置の伝動系に正転等速駆動機構側からの出力を伝達し、
他方のクローラ式走行装置の伝動系に前記旋回モード切
換手段によって作動態勢に切り換えられた機構側からの
出力が伝達される旋回走行状態とに、左右のクローラ式
走行装置に対する伝動形態を切換る操向方向選択伝動手
段を備えている点にある。
According to the present invention, a threshing device is mounted on a vehicle body, and a mowing pre-processing unit is connected to a front end of the vehicle body so as to be vertically movable. Equipped with a crawler-type traveling device configured to intermittently or fluctuate the transmission power to the vehicle to steer the aircraft, in a single transmission case equipped with a transmission to which the transmission power from the engine is input, A forward constant-speed drive mechanism for transmitting the transmission power to the left and right drive wheels at constant speed to the crawler-type traveling devices on both sides without changing the rotation direction thereof; and transmitting the transmission power to the left and right drive wheels in the rotation direction. A forward rotation reduction mechanism that decelerates without changing the power and transmits it to the crawler traveling device inside the turn, and a reverse rotation transmission mechanism that converts the transmitted power to the reverse direction and transmits it to the crawler traveling device inside the revolution. If you have Turning mode switching means for selectively selecting one of the forward rotation reduction mechanism and the reverse rotation transmission mechanism and switching to the active state, and further operated by the turning mode switching means for the transmission system of the left and right crawler type traveling device. A straight traveling state in which transmission of output from the mechanism switched to the posture is cut off, and output from the forward rotation constant-speed drive mechanism is transmitted to both transmission systems of the left and right crawler-type traveling devices; The output from the forward rotation constant speed drive mechanism side is transmitted to the transmission system of one crawler type traveling device of the type traveling device,
An operation of switching the transmission mode to the left and right crawler traveling devices to a turning traveling state in which the output from the mechanism side switched to the active state by the turning mode switching means is transmitted to the transmission system of the other crawler traveling device. It is provided with a direction selection transmission means.

【0005】〔作用〕上記の特徴構成によれば、正転減
速機構を選択して旋回内側のクローラ式走行装置を減速
駆動すると、走行場所が舗装路であっても泥土状の圃場
であってもその旋回内側のクローラ式走行装置を強制的
に一定速度で駆動できるから、例えば、一般的な圃場で
はクローラ式走行装置のラグ跡が残るだけで、クラッチ
・ブレーキターンの如くラグが土を削って圃場を荒らす
ことが少なくなる。湿田ではスリップがないので圃場を
荒らし難いとともに、一回の切返しで旋回が可能で、ク
ラッチ・ブレーキターンのように、前進・後進のときに
スリップして圃場を荒らしたり、何回も切返しを行って
旋回をするという不都合がなくなる。そして、逆転伝動
機構を選択して旋回内側のクローラ式走行装置を逆転駆
動すると、理論上旋回半径が零であるその場旋回(超信
地旋回)が行えるようになる。故に、例えば、乾田圃場
においては、従来のクラッチ・ブレーキターンでは大き
く前進・後進を繰り返して次の刈取るべき条に機体を合
せること、即ち条合せをしなければならず条合せが困難
であるとともに、旋回には広いスペースを必要として作
業能率も悪くなるが、逆転駆動による小回り旋回で条合
せも楽に行え、作業ロスも少なくすることができる。そ
して、上記のように圃場を荒らすことが少ない正転減速
機構を選択した正転減速旋回と、最小半径での小回りが
可能な前記逆転機構を選択した超信地旋回との、何れの
旋回モードでの旋回を行うかの切換は、単一の伝動ケー
ス内に配設されている正転減速機構と逆転機構とのいず
れかを、背反的に択一選択可能な旋回モード切換手段
で、二者択一の簡単な操作で選択することができる。こ
のような旋回モードの選択は、湿田では旋回跡を荒らさ
ず機体の沈み込みが少ない正転減速旋回、乾田では旋回
効率のよい逆転旋回と、圃場条件や作業目的に合わせ
て、正転減速旋回が適しているか、超信地旋回が適して
いるかを判断し、旋回開始時点であるか直進走行中であ
るかを問わず、予め、背反的に選択切換しておくことが
できるので、実際に旋回走行の開始時点では、操向方向
選択伝動手段の操作によって、旋回方向が右であるか左
であるかの選択操作を行うだけで良く、その操作も簡便
なもので済む。しかして、従来の技術範疇で上記特徴構
成を具現化させるには、左右の走行装置夫々に対して各
別に油圧モータ(静油圧式無段変速装置)を備えた伝動
系の採用等、構造が複雑になるとともにコスト高となる
問題点を有し、更なる改善の余地がある。
[Operation] According to the above-mentioned characteristic configuration, when the forward rotation speed reduction mechanism is selected and the crawler type traveling device inside the turn is decelerated and driven, even if the traveling place is a pavement road, it is a muddy field. Since the crawler-type traveling device inside the turning can be forcibly driven at a constant speed, for example, in a general field, only a lag mark of the crawler-type traveling device remains, and the rug cuts the soil like a clutch / brake turn. And reduce the likelihood of damaging the field. Since there is no slip in the wetland, it is difficult to mess up the field, and it is possible to turn with one turn, and like clutch and brake turns, slip and roughen the field when moving forward and backward, and repeatedly turn over. This eliminates the inconvenience of turning. Then, when the reverse rotation transmission mechanism is selected and the crawler-type traveling device inside the turning is reversely driven, an in-situ turning (super turning) in which the turning radius is theoretically zero can be performed. Therefore, for example, in a dry rice field, it is necessary to adjust the machine body to the next strip to be harvested by repeating the forward and reverse movements largely in the conventional clutch and brake turns, that is, the alignment must be performed. At the same time, the turning requires a large space and the working efficiency is deteriorated, but the turning can be easily performed by the small turning by the reverse rotation drive, and the work loss can be reduced. Any of the turning modes of the forward rotation deceleration turning that selects the normal rotation deceleration mechanism that hardly damages the field as described above and the super pivot turning that selects the reverse rotation mechanism that can make a small turn with the minimum radius The turning mode is switched by a turning mode switching means that can select one of a forward rotation reduction mechanism and a reverse rotation mechanism disposed in a single transmission case in a reciprocal manner. The selection can be made by simple and optional operation. The selection of such a turning mode is a forward rotation deceleration turning in which swiveling is less likely to occur without damaging the turning trace in a wet field, a reverse rotation turning with good turning efficiency in a dry field, and a normal rotation deceleration turning in accordance with field conditions and work purpose. It is determined whether or not super turning is suitable, regardless of whether it is at the start of turning or traveling straight ahead, it is possible to previously select and reciprocally switch, so actually At the start of the turning travel, it is only necessary to perform an operation of selecting whether the turning direction is right or left by operating the steering direction selection transmission means, and the operation is simple. However, in order to realize the above-mentioned characteristic configuration in the conventional technical category, a structure such as adoption of a transmission system provided with a hydraulic motor (hydrostatic continuously variable transmission) separately for each of the left and right traveling devices is used. There is a problem that it becomes complicated and costly, and there is room for further improvement.

【0006】〔発明の効果〕ミッションを内装する単一
の伝動ケース内に、正転等速駆動機構とともに、正転減
速機構と逆転機構を内蔵せしめて、この正転減速機構と
逆転機構を、圃場条件等に応じていずれか一方を旋回モ
ード切換手段で選択し、その正転減速機構と逆転機構の
出力側で、直進から右または左の旋回方向の選択切換を
行うことができる操向方向選択伝動手段を備えた構成と
したことにより、前記したコンバインの収穫作業の特徴
に良く対応した旋回操作を行える。つまり、圃場条件や
作業目的に合わせて、正転減速旋回か逆転旋回かのいず
れの旋回モードで旋回するかを、背反的に択一選択でき
る旋回モード切換手段で選択しておけば、その後の作業
走行中には、前記正転減速機構と逆転機構との出力側に
おいて、正転等速駆動機構による直進走行状態から、操
向方向選択伝動手段を用いて右または左の旋回方向を選
択するだけの簡単な操作で、前記の選択した旋回モード
での旋回を行うことができ、操作の単純化により高齢者
や婦女子にも扱い易く、作業能率が高く、圃場を荒さ
ず、旋回操作の容易なコンバインを実現した。
[Effect of the Invention] In a single transmission case containing a transmission, a forward rotation constant speed drive mechanism, a forward rotation reduction mechanism and a reverse rotation mechanism are incorporated, and the forward rotation reduction mechanism and the reverse rotation mechanism are combined. One of the turning directions is selected by the turning mode switching means according to the field conditions and the like, and the selection side can be switched from the straight running to the right or left turning direction on the output side of the forward rotation reduction mechanism and the reverse rotation mechanism. With the configuration including the selection transmission means, a turning operation can be performed that well corresponds to the characteristics of the combine harvesting operation described above. In other words, in accordance with the field conditions and work purpose, if the turning mode is selected in the turning mode of the forward decelerating turning or the reverse turning by the turning mode switching means that can be selected reciprocally, the subsequent turning mode can be selected. During work traveling, at the output side of the forward rotation reduction mechanism and the reverse rotation mechanism, a right or left turning direction is selected using the steering direction selection transmission means from the straight traveling state by the forward constant speed drive mechanism. With just a simple operation, it is possible to turn in the above-mentioned turning mode selected, it is easy to handle for the elderly and women and women by simplicity of operation, work efficiency is high, field is not roughened, turning operation is easy Combines have been realized.

【0007】[0007]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0008】図8に示すように、左右一対のクローラ式
走行装置1,1を備えた車体2に脱穀装置3を搭載し、
又、車体2の前端に刈取前処理部4を昇降自在に連結
し、更に、この刈取前処理部4の右側に位置する車体前
部に運転部Aを形成して、作業車の一例としてのコンバ
インが構成されている。同図に示す如く、走行装置位置
は駆動スプロケット1a、多数の遊転輪1b、クローラ
ベルト1cの夫々で成り、又、駆動スプロケット1aは
車体の左右中央に配置されたミッションMからの動力が
伝えられるよう伝動系が形成されている。
As shown in FIG. 8, a threshing device 3 is mounted on a vehicle body 2 having a pair of right and left crawler type traveling devices 1, 1.
Also, a cutting pre-processing unit 4 is connected to the front end of the vehicle body 2 so as to be able to move up and down, and a driving unit A is formed at the front of the vehicle body located on the right side of the cutting pre-processing unit 4 so as to serve as an example of a working vehicle. A combine is configured. As shown in the figure, the position of the traveling device is composed of a driving sprocket 1a, a number of idler wheels 1b, and a crawler belt 1c. The driving sprocket 1a receives power from a transmission M arranged at the left and right center of the vehicle body. The transmission system is formed so that the

【0009】図1に示すように、ミッションMの伝動ケ
ース5にはエンジン(図示せず)からの動力が入力プー
リ6を介して伝えられる入力軸7、この入力軸7に外嵌
した出力ギヤ8からの動力が、その軸に外嵌したシフト
ギヤ9を介して伝えられるシフタ軸10、シフタ軸10
のシフトギヤ9からの動力が、その軸に外嵌した3つの
ギヤ11のいずれかに伝えられる中間軸12、この中間
軸12からの動力が各々伝えられると共に、各々入力ギ
ヤG1,G2,G3,Gbを有する変速用クラッチB
1,B2,B3,Bbが外嵌された第1,第2変速軸1
3,14の夫々を備えており、それら軸によって主変速
系が構成されている。
As shown in FIG. 1, an input shaft 7 through which a power from an engine (not shown) is transmitted via an input pulley 6 to a transmission case 5 of a transmission M, and an output gear externally fitted to the input shaft 7. Shaft 8, the power from the motor 8 is transmitted via a shift gear 9 externally fitted to the shaft.
, The power from the shift gear 9 is transmitted to any of the three gears 11 fitted on the shaft, the power from the intermediate shaft 12 is transmitted, and the input gears G1, G2, G3, Transmission clutch B having Gb
1st, 2nd speed change shaft 1 in which 1, B2, B3, and Bb are fitted.
3, 14 are provided, and a main transmission system is constituted by these shafts.

【0010】ミッションMには、主変速系からの回転動
力をその回転方向を変えずに減速して伝動する正転減速
機構Dと、回転方向を逆方向に変換して伝動する逆転伝
動機構Eとが組み込まれているとともに、左右のクロー
ラ式走行装置1,1のうちの一方に制動力を作用可能な
油圧ブレーキ29を設けてある。そして正転減速状態、
逆転伝動状態のいずれかの状態で左右のクローラ式走行
装置1,1のうちの一方に伝える、あるいは、一方のク
ローラ式走行装置1に制動力を作用させるよう、正転減
速機構D、逆転伝動機構E、及び油圧ブレーキ29のう
ちの1つを択一的に選択して切換可能な旋回モード切換
手段を設けた走行制御装置が備えられている。
The transmission M includes a forward rotation reduction mechanism D that transmits the rotational power from the main transmission system while changing the rotational direction without changing the rotational direction, and a reverse rotation transmission mechanism E that converts the rotational direction to the reverse direction and transmits the rotational power. And a hydraulic brake 29 capable of applying a braking force is provided to one of the left and right crawler traveling devices 1 and 1. And forward rotation deceleration state,
A forward rotation reduction mechanism D and a reverse rotation transmission so as to transmit to one of the left and right crawler traveling devices 1 or 1 in one of the reverse rotation transmission states, or to apply a braking force to one of the crawler traveling devices 1. There is provided a travel control device provided with turning mode switching means capable of selectively selecting one of the mechanism E and the hydraulic brake 29 for switching.

【0011】即ち、走行制御装置は、伝動ケース5の中
央位置から下方に亘って順次配置された第1軸15、第
2軸16、操向クラッチ軸17、及び、前記第1、第2
変速軸13,14夫々に設けられた出力ギヤ13a,1
4aからの動力が伝えられるよう第1軸15に外嵌した
入力ギヤ18、第1軸15と第2軸16とに設けたスプ
ロケット19,20にチェーンで成る無端回動帯21を
巻回して成る伝動系、第1軸15と第2軸16とに設け
たスプロケット19,20にチェーンで成る無端回動帯
21を巻回して成る伝動系、第1軸15と第2軸16と
に設けたギヤ22a,22bを有するギヤ伝動機構22
で成る伝動系、これら2つの伝動系夫々に介装された油
圧クラッチ23,24、操向クラッチ軸17の中央に遊
転支承され、第1軸15の入力ギヤ18に咬合するクラ
ッチギヤ25、このクラッチギヤ25の左右位置の操向
クラッチ軸17に外嵌されたクラッチスリーブ26,2
6、第2軸16からの動力を夫々のクラッチスリーブ2
6,26の外側位置に伝える2組のギヤ連動部27,2
7、クラッチスリーブ26,26を操作するシフトフォ
ーク28,28、第2軸16に制動力を作用させる油圧
ブレーキ29各々を備えて構成されている。
That is, the traveling control device comprises a first shaft 15, a second shaft 16, a steering clutch shaft 17, and a first and a second shaft arranged sequentially from the center of the transmission case 5 downward.
Output gears 13a, 1 provided on the transmission shafts 13, 14, respectively
An endless rotating band 21 composed of a chain is wound around an input gear 18 externally fitted to the first shaft 15 and sprockets 19 and 20 provided on the first shaft 15 and the second shaft 16 so that the power from 4a is transmitted. A transmission system in which an endless rotating band 21 made of a chain is wound around sprockets 19 and 20 provided on a first shaft 15 and a second shaft 16, provided on a first shaft 15 and a second shaft 16. Transmission mechanism 22 having gears 22a and 22b
A hydraulic transmission clutch 23, 24 interposed in each of these two transmission systems; a clutch gear 25, which is rotatably supported at the center of the steering clutch shaft 17 and meshes with the input gear 18 of the first shaft 15; Clutch sleeves 26, 2 fitted externally to the steering clutch shaft 17 at the left and right positions of the clutch gear 25.
6. The power from the second shaft 16 is applied to each clutch sleeve 2
6 and 2 sets of gear interlocking parts 27 and 2
7, a shift fork 28 for operating the clutch sleeves 26, 26, and a hydraulic brake 29 for applying a braking force to the second shaft 16 are provided.

【0012】又、伝動ケース5の下端部にはクローラ式
走行装置1,1夫々の駆動スプロケット1a,1aに連
結する駆動軸30,30が支承されるとともに、この駆
動軸30,30の内端部にはクラッチスリーブ26,2
6のギヤ部と咬合するギヤ31,31が備えられてい
る。そして、操向操作を行う場合には後述する油圧系の
操作によって前記2つの油圧クラッチ23,24あるい
は油圧ブレーキ29のうちの1つを選択するとともに、
左右のシフトフォーク28,28のうちの一方を操作す
ることで、クラッチスリーブ26は図1では左側に示さ
れるもののように、ギヤ連動部27を介して第2軸16
と連結状態に達し、この側のクローラ式走行装置1に対
しては、減速状態の動力が伝えられる、あるいは、逆転
状態の動力が伝えられる、あるいは、制動力が作用する
ようになっている。
At the lower end of the transmission case 5, drive shafts 30, 30 connected to the respective drive sprockets 1a, 1a of the crawler type traveling device 1, 1 are supported, and the inner ends of the drive shafts 30, 30 are supported. The parts are clutch sleeves 26 and 2
6 are provided with gears 31 that mesh with the gear portion 6. When the steering operation is performed, one of the two hydraulic clutches 23 and 24 or the hydraulic brake 29 is selected by operating a hydraulic system described later.
By operating one of the left and right shift forks 28, 28, the clutch sleeve 26 is moved through the gear interlocking portion 27 as shown on the left side in FIG.
To the crawler-type traveling device 1 on this side, power in a deceleration state is transmitted, power in a reverse rotation state is transmitted, or a braking force is applied.

【0013】尚、前記クラッチギヤ25とそのクラッチ
ギヤ25に動力を伝える変速機構が正転等速駆動機構を
構成し、かつ、前記クラッチギヤ25、クラッチスリー
ブ26,26、ギヤ連動部27,27夫々を併せて操向
クラッチC,Cと称し、この操向クラッチC,Cを含ん
で、その前後の前記正転減速機構Dと前記逆転伝動機構
Eとの出力を受ける第2軸16、並びに、前記操向クラ
ッチC,Cの出力部となるクラッチスリーブ26のギヤ
部と咬合するギヤ31等で構成される伝動系により、前
記作動態勢に切り換えられた機構DまたはEからの出力
を旋回内側のクローラ式走行装置1の伝動系に伝達する
操向方向選択伝動手段を構成している。
The clutch gear 25 and a transmission mechanism for transmitting power to the clutch gear 25 constitute a forward rotation constant speed drive mechanism, and the clutch gear 25, clutch sleeves 26, 26, and gear interlocking parts 27, 27 Each of them is referred to as a steering clutch C, C, and the second shaft 16 including the steering clutch C, C and receiving the output of the forward rotation reduction mechanism D and the reverse rotation transmission mechanism E before and after it, and The output from the mechanism D or E, which has been switched to the active state, is turned inside by a transmission system including a gear 31 and the like that meshes with a gear portion of the clutch sleeve 26 serving as an output portion of the steering clutch C. Of the crawler-type traveling device 1 of the first embodiment.

【0014】前記のように入力プーリ6を介して入力軸
7に伝えられた動力は油圧ポンプ32を駆動するととも
に、2つの軸33,34を介して、刈取前処理部4に動
力を伝えるための出力プーリ35を駆動し、又、4つの
変速用クラッチB1,B2,B3,Bbは前進3速、及
び、後進1速の変速を行い、第1変速軸13には機械式
の駐車ブレーキ36が設けられている。又、この伝動ケ
ース5の内部の伝動系は図2に示す如く、前後方向での
ギヤの重複配置によって、上下方向の寸法の縮少を図っ
てあり、又、図3に示すように、走行制御装置の組立て
を楽に行えるよう、伝動ケース5の左右側部に開口が形
成され、かつ、この開口を閉じるための蓋体5a,5a
が備えられている。
The power transmitted to the input shaft 7 via the input pulley 6 as described above drives the hydraulic pump 32 and transmits the power to the pre-cutting unit 4 via the two shafts 33 and 34. , And the four speed change clutches B1, B2, B3, and Bb perform the third forward speed and the first reverse speed, and the first transmission shaft 13 has a mechanical parking brake 36. Is provided. As shown in FIG. 2, the transmission system inside the transmission case 5 has a reduced vertical dimension due to the overlapping arrangement of gears in the front-rear direction, and as shown in FIG. Openings are formed on the left and right sides of the transmission case 5 so that the control device can be easily assembled, and lids 5a, 5a for closing the openings.
Is provided.

【0015】図3に示すように、シフトフォーク28,
28の操作軸28a,28a夫々の伝動ケース5の外端
部には操作アーム37,37が取付けられ、又、これら
の操作アーム37,37を操作するためのピストン3
8,38を収めたケース39が伝動ケース5の前面に取
付けられ、このピストン38,38及び前記4つの変速
用クラッチB1,B2,B3,Bb、2つの油圧クラッ
チ23,24、油圧ブレーキ29を制御するための系は
図4の如く表わされる。つまり、油圧ポンプ32からの
作動油は変速制御弁40を介して変速用クラッチB1,
B2,B3,Bb夫々に供給され、かつ、同様に、操向
制御弁41を介して前記ピストン38,38に供給さ
れ、又、38,38を収めるシリンダ38a,38aか
らの作動油が操向モード切換弁〔旋回モード切換手段に
相当〕42を介して2つの油圧クラッチ23,24及び
油圧ブレーキ29に供給される。尚、変速制御弁40は
伝動ケース5の側部に、操向制御弁41はロータリ型に
構成されてケース39に夫々備えられ、操向モード切換
弁42は蓋体5aに備えられ、変速制御弁40は運転部
Aに設けた変速レバー43と連係し、又、運転部Aに設
けた操向レバー44の左右操作で操向制御弁41を操作
し、操向レバー44のレバー軸芯に沿うシフト操作で操
向モード切換弁42を操作するよう夫々が連係されてい
る。
As shown in FIG. 3, the shift forks 28,
Operation arms 37, 37 are attached to the outer end of the transmission case 5 of each of the operation shafts 28a, 28a, and a piston 3 for operating these operation arms 37, 37 is provided.
A case 39 containing the gears 8 and 38 is attached to the front surface of the transmission case 5, and the pistons 38 and 38, the four shift clutches B1, B2, B3, and Bb, the two hydraulic clutches 23 and 24, and the hydraulic brake 29 are mounted. The control system is shown in FIG. That is, the operating oil from the hydraulic pump 32 is transmitted through the transmission control valve 40 to the transmission clutch B1,
B2, B3, and Bb are respectively supplied to the pistons 38, 38 via a steering control valve 41, and hydraulic oil from cylinders 38a, 38a containing the 38, 38 is steered. It is supplied to two hydraulic clutches 23 and 24 and a hydraulic brake 29 via a mode switching valve (corresponding to a turning mode switching means) 42. The shift control valve 40 is provided on the side of the transmission case 5, the steering control valve 41 is formed in a rotary type and provided in the case 39, and the steering mode switching valve 42 is provided in the lid 5a. The valve 40 cooperates with a shift lever 43 provided in the operating unit A, and operates the steering control valve 41 by left and right operation of a steering lever 44 provided in the operating unit A. Each of them is linked so that the steering mode switching valve 42 is operated by the shift operation along.

【0016】又、操向制御弁41は、図5乃至図7に示
す弁本体41aに油圧ポンプ32からの圧油が供給され
る第1環状溝45、円弧状に形成された2つの円弧状溝
46,46、これら円弧状溝46,46に挟まれた位置
に屈曲状態で形成された第2環状溝47、排油溝48と
連通する状態で形成された第3環状溝49夫々を、その
外面に有し、又、2つの円弧状溝46,46は第1環状
溝45と油路孔50を介して連通している。
The steering control valve 41 includes a first annular groove 45 for supplying pressure oil from the hydraulic pump 32 to a valve body 41a shown in FIGS. 5 to 7, and two arc-shaped grooves. The grooves 46, 46, the second annular groove 47 formed in a bent state at a position sandwiched between the arc-shaped grooves 46, 46, and the third annular groove 49 formed in a state of communicating with the oil drain groove 48, respectively. The two arc-shaped grooves 46, 46 are provided on the outer surface thereof and communicate with the first annular groove 45 via the oil passage hole 50.

【0017】第2環状溝47と図6に示す操作位置での
排油溝48とは油路孔51を介して排油系に連通し、弁
本体41aの回動操作によって2つの円弧状溝46,4
6のうちの一方からの圧油がいずれか一方のシリンダ部
38a,38aに供給されるよう油路51,52が形成
され、シリンダ部38a,38aの壁部から引き出され
た油路53が前述のように、操向モード切換弁42に供
給され、この油路53から分岐した油路54が第3環状
溝49と連通している。そして、操向操作時には弁本体
41aの回動操作によっていずれか一方のピストン38
が動作した後、弁本体41aを更に回動操作することで
排油溝48から流れ出す作動油の量が徐々に抑制される
結果、前記2つの油圧クラッチ23,24あるいは油圧
ブレーキ29に対する作動油圧が徐々に上昇して円滑に
操向動作を行えるようになっているのである。尚、図1
に示す如くピストン38,38がストロークエンドまで
動作しても、クラッチスリーブ26,26は外側に位置
するベアリング等と接触しないよう動作ストロークが設
定されている。
The second annular groove 47 and the oil drain groove 48 at the operation position shown in FIG. 6 communicate with the oil drain through an oil passage hole 51, and are turned into two arc-shaped grooves by rotating the valve body 41a. 46,4
The oil passages 51 and 52 are formed such that the pressure oil from one of the cylinders 6 is supplied to one of the cylinder portions 38a and 38a, and the oil passage 53 drawn out from the wall of the cylinder portions 38a and 38a is formed as described above. The oil path 54 is supplied to the steering mode switching valve 42 and branched from the oil path 53 to communicate with the third annular groove 49 as shown in FIG. Then, at the time of the steering operation, one of the pistons 38 is operated by rotating the valve body 41a.
Is operated, the valve body 41a is further rotated so that the amount of hydraulic oil flowing out from the oil drain groove 48 is gradually suppressed. As a result, the hydraulic pressure applied to the two hydraulic clutches 23 and 24 or the hydraulic brake 29 is reduced. The steering operation can be smoothly performed by ascending gradually. FIG.
As shown in (2), even when the pistons 38, 38 operate to the stroke end, the operation stroke is set so that the clutch sleeves 26, 26 do not come into contact with bearings or the like located outside.

【0018】尚、特許請求の範囲の項に図面との対照を
便利にする為に符号を記すが、該記入により本発明は添
付図面の構成に限定されるものではない。
In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

【図面の簡単な説明】[Brief description of the drawings]

【図1】伝動ケースの断面図FIG. 1 is a sectional view of a transmission case.

【図2】伝動ケース内の伝動系を表わす側面図FIG. 2 is a side view showing a transmission system in a transmission case.

【図3】操向操作系を表わす正面図FIG. 3 is a front view showing a steering operation system.

【図4】油圧回路図FIG. 4 is a hydraulic circuit diagram

【図5】ピストンに対する油路を表わす概略図FIG. 5 is a schematic diagram showing an oil passage for a piston.

【図6】操向制御弁を表わす側面図FIG. 6 is a side view showing a steering control valve.

【図7】排油溝等を表わす断面図FIG. 7 is a sectional view showing an oil drain groove and the like.

【図8】コンバイン前部の側面図FIG. 8 is a side view of the front of the combine.

【符号の説明】 1 クローラ式走行装置 1a 駆動輪体 2 車体 3 脱穀装置 4 刈取前処理部 5 伝動ケース 42 旋回モード切換手段 C 走行クラッチ D 正転減速駆動機構 E 逆転伝動機構 M ミッション[Description of Signs] 1 Crawler-type traveling device 1a Driving wheel body 2 Body 3 Threshing device 4 Harvesting pre-processing unit 5 Power transmission case 42 Turning mode switching means C Travel clutch D Forward rotation deceleration drive mechanism E Reverse rotation transmission mechanism M Transmission

【手続補正2】[Procedure amendment 2]

【補正対象書類名】図面[Document name to be amended] Drawing

【補正対象項目名】図1[Correction target item name] Fig. 1

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【図1】 FIG.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 第1軸からの動力を、無端回動帯、及
び、クラッチを介して正転状態で第2軸に伝える伝動系
と、第1軸からの動力を、ギヤ伝動機構、及び、クラッ
チを介して逆転状態で第2軸からの動力を左右の操向装
置に対して独立に伝える操向クラッチが備えられて成る
作業車の操向制御装置。
A transmission system for transmitting power from the first shaft to the second shaft in a forward rotation state via an endless rotation band and a clutch; a gear transmission mechanism for transmitting power from the first shaft; And a steering control device for a working vehicle including a steering clutch for independently transmitting power from the second shaft to the left and right steering devices in a reverse state via the clutch.
JP10004035A 1998-01-12 1998-01-12 Combine steering controller for dry and wet fields Expired - Lifetime JP2977788B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10004035A JP2977788B2 (en) 1998-01-12 1998-01-12 Combine steering controller for dry and wet fields

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10004035A JP2977788B2 (en) 1998-01-12 1998-01-12 Combine steering controller for dry and wet fields

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP63064887A Division JPH0774012B2 (en) 1988-03-17 1988-03-17 Steering control device for combine harvester

Publications (2)

Publication Number Publication Date
JPH10218002A true JPH10218002A (en) 1998-08-18
JP2977788B2 JP2977788B2 (en) 1999-11-15

Family

ID=11573719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10004035A Expired - Lifetime JP2977788B2 (en) 1998-01-12 1998-01-12 Combine steering controller for dry and wet fields

Country Status (1)

Country Link
JP (1) JP2977788B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000035736A1 (en) * 1998-12-16 2000-06-22 Yanmar Agricultural Equipment Co., Ltd. Work vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000035736A1 (en) * 1998-12-16 2000-06-22 Yanmar Agricultural Equipment Co., Ltd. Work vehicle

Also Published As

Publication number Publication date
JP2977788B2 (en) 1999-11-15

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