JPH0790791B2 - Transmission structure for traveling of work vehicle - Google Patents

Transmission structure for traveling of work vehicle

Info

Publication number
JPH0790791B2
JPH0790791B2 JP1277764A JP27776489A JPH0790791B2 JP H0790791 B2 JPH0790791 B2 JP H0790791B2 JP 1277764 A JP1277764 A JP 1277764A JP 27776489 A JP27776489 A JP 27776489A JP H0790791 B2 JPH0790791 B2 JP H0790791B2
Authority
JP
Japan
Prior art keywords
transmission
clutch
traveling
reverse
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP1277764A
Other languages
Japanese (ja)
Other versions
JPH03139473A (en
Inventor
和嘉 平田
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
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP1277764A priority Critical patent/JPH0790791B2/en
Priority to KR1019900017022A priority patent/KR940009858B1/en
Publication of JPH03139473A publication Critical patent/JPH03139473A/en
Publication of JPH0790791B2 publication Critical patent/JPH0790791B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は作業車の走行用伝動構造、詳しくは、左右走行
装置のいずれもを前進駆動して機体直進をさせ、そし
て、左右走行装置の一方を前進側に駆動しながら他方を
制動して機体を信地旋回させたり、左右走行装置の一方
を前進側に、かつ、他方を後進側に駆動して機体を超信
地旋回させることが可能な走行用伝動構造に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a traveling power transmission structure for a work vehicle, and more specifically, to drive forward and backward motions of both left and right traveling devices to move the vehicle straight. It is possible to drive one side to the forward side and brake the other side to turn the aircraft to the turning side, or to drive one of the left and right traveling devices to the forward side and the other side to the reverse side to turn the body to the super turning side. A possible traveling transmission structure.

〔従来の技術〕[Conventional technology]

上記走行用伝動構造として従来、例えば特公昭57−6098
8号公報に示されるものがあった。
Conventionally, for example, Japanese Examined Patent Publication No. Sho 57-6098 has been used as the traveling power transmission structure.
There was one shown in Japanese Patent No. 8.

すなわち、左右走行装置の夫々に対し、前進動力伝達用
の第1駆動回転体と後進動力伝達用の第2駆動回転体を
同一の軸芯周りで回動するように設けると共に、第2駆
動回転体を回転駆動される状態と回動不能に固定される
状態とに切換え可能なブレーキ手段を設け、そして、走
行装置に動力伝達するように連動された回転伝動体を第
1駆動回転体と第2駆動回転体の間に同芯状に、かつ、
軸芯方向に摺動操作できるように設けると共に、第1駆
動回転体と回転伝動体の間に咬合い式前進用クラッチ
を、かつ、第2駆動回転体と回転伝動体の間に咬合い式
後進用クラッチを夫々回転伝動体の摺動によって入り切
り操作されるように設け、回転伝動体の摺動操作による
クラッチ操作によって機体操向をするように、かつ、ブ
レーキ手段の切換えによる第2駆動回転体の状態切換え
によって旋回形態の切換えをするようになっているので
ある。すなわち、左右走行装置の一方に対する前進用ク
ラッチを入り操作し、他方に対する第2駆動回転体を固
定状態に、かつ、後進用クラッチを入りに夫々操作する
ことにより、一方の走行装置が前進駆動されて他方の走
行装置が制動されるのである。そして、左右走行装置の
一方に対する前進用クラッチを入り操作し、他方に対す
る第2駆動回転体を駆動状態に、かつ、後進用クラッチ
を入りに夫々操作することにより、一方の走行装置が前
進駆動されて他方の走行装置が後進駆動されるのであ
る。
That is, for each of the left and right traveling devices, a first driving rotary body for forward power transmission and a second driving rotary body for reverse power transmission are provided so as to rotate about the same axis, and the second driving rotary body is provided. A brake means is provided which can switch the body between a rotationally driven state and a non-rotatably fixed state, and a rotary transmission body that is interlocked to transmit power to the traveling device is provided as a first drive rotary body and a first drive rotary body. Concentric between two drive rotors, and
Provided so as to be slidable in the axial direction, an articulation type forward clutch is provided between the first drive rotary body and the rotary transmission body, and an articulation type clutch is provided between the second drive rotary body and the rotary transmission body. Each of the reverse clutches is provided so as to be opened and closed by sliding of the rotary transmission body, so that the vehicle body can be steered by the clutch operation by the sliding operation of the rotary transmission body, and the second drive rotation by switching the braking means. By changing the state of the body, the turning form is changed. That is, by operating the forward drive clutch for one of the left and right traveling devices, operating the second drive rotor for the other in a fixed state, and operating the reverse drive clutch for each, the traveling device of one is driven forward. As a result, the other traveling device is braked. Then, the forward drive clutch for one of the left and right traveling devices is operated to be engaged, the second drive rotor for the other is operated to be driven, and the reverse drive clutch is operated to be operated to drive one traveling device forward. The other traveling device is driven in reverse.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

従来、上記ブレーキ手段にあっては第2駆動回転体を動
力源に対する伝動状態と非伝動状態に切換えられるよう
に、しかも、非伝動状態に在る第2駆動回転体に制動付
与できるように構成する必要があることから伝動構造が
複雑になっていた。
Conventionally, in the above-mentioned braking means, the second drive rotor is configured to be switched between a transmission state and a non-transmission state with respect to the power source, and further, braking can be applied to the second drive rotor in the non-transmission state. The transmission structure was complicated by the need to do so.

本発明の目的は、信地旋回及び超信地旋回のいずれもが
構造面及び操作面のいずれをも有利にしながらできる走
行用伝動構造を提供することにある。
It is an object of the present invention to provide a traveling transmission structure capable of performing both pivotal turning and super-tightening whilst making both structural and operational surfaces advantageous.

〔課題を解決するための手段〕[Means for Solving the Problems]

本発明による作業車の走行用伝動構造にあっては、目的
構成のために、左右の走行装置夫々に対し、同一の軸芯
の周りで回動する前進動力伝達用の第1駆動回転体と後
進動力伝達用の第2駆動回転体との間に、回転伝動体を
前記走行装置に連動されたままで前記軸芯の方向に摺動
自在に設け、前記回転伝動体と前記第1駆動回転体の間
に前進用クラッチを、かつ、前記回転伝動体と前記第2
駆動回転体の間にディスク式の後進用摩擦クラッチを夫
々、前記回転伝動体の摺動によって入り切り変化すると
共に択一的に入りになる状態で設け、前記後進用摩擦ク
ラッチに対する入り操作位置に前記回転伝動体を操作す
る油圧シリンダ、及び、この油圧シリンダに対する給油
圧を変更調節して前記回転伝動体による前記後進用摩擦
クラッチの入り操作圧を変更する調圧弁を設けてある。
そして、その作用及び効果は次のとおりである。
In the transmission structure for traveling of the work vehicle according to the present invention, the first drive rotating body for forward power transmission that rotates about the same axis for each of the left and right traveling devices is provided for the purpose of constructing the object. A rotation transmission body is provided slidably in the direction of the axis while being interlocked with the traveling device between the second transmission rotation body for reverse power transmission and the rotation transmission body and the first drive rotation body. A forward clutch between the rotary transmission body and the second clutch.
A disk-type reverse friction clutch is provided between the driving rotating bodies in such a state that it can be selectively turned on and off by sliding of the rotary transmission body and can be selectively turned on and off. There are provided a hydraulic cylinder for operating the rotary transmission body, and a pressure regulating valve for changing and adjusting the hydraulic pressure supplied to the hydraulic cylinder to change the operating pressure of the reverse transmission friction clutch by the rotary transmission body.
The action and effect are as follows.

〔作 用〕 左右走行装置いずれもに対する前進用クラッチを入りに
操作すると、第1駆動回転体の前進動力が回転伝動体に
より走行装置に伝達され、左右走行装置のいずれもが前
進側に駆動されて機体が直進する。
[Operation] When the forward clutch for both the left and right traveling devices is operated with the forward movement, the forward drive power of the first drive rotor is transmitted to the traveling device by the rotation transmission body, and both the left and right traveling devices are driven to the forward side. The aircraft will go straight.

そして、左右走行装置の一方に対する前進用クラッチを
入りに操作すると共に他方に対する油圧シリンダのバル
ブ操作をし、油圧シリンダを作動させて後進用クラッチ
を入に操作させると、一方の走行装置が第1駆動回転体
から動力伝達されて前進側に駆動され、他方の走行装置
が第2の駆動回転体から動力伝達されて後進側に駆動さ
れ、機体が旋回する。この場合、調圧バルブにより後進
用クラッチの入り操作圧を調節することにより、後進用
クラッチを入り圧が設定最高圧よりも低い適正値の半ク
ラッチ状態に調節して旋回内側の走行装置が前進駆動さ
れる旋回外側の走行装置による引きずり作用にかかわら
ず回動しない停止するように制動されたり、後進用クラ
ッチを入り圧が設定最高圧である完全入り状態にして旋
回内側の走行装置が後進側に駆動されるようになる。つ
まり、旋回内側の走行装置を第2駆動回転体の回動力に
より制動させて機体旋回させたり、左右走行装置を互い
に反対の回転方向に駆動させて機体旋回させることがで
きる。
Then, when the forward clutch for one of the left and right traveling devices is operated on and the valve of the hydraulic cylinder for the other is operated to operate the hydraulic cylinder to operate the reverse clutch on, one of the traveling devices is set to the first position. The power is transmitted from the drive rotating body to be driven to the forward side, and the other traveling device is transmitted to the power from the second drive rotating body to be driven to the reverse side, so that the machine body turns. In this case, by adjusting the operation pressure of the reverse clutch with the pressure regulating valve, the reverse clutch is adjusted to a half-clutch state where the engagement pressure is lower than the set maximum pressure, and the traveling device inside the turn advances. The driven device on the inside of the turn is set to the fully engaged state where the engaging pressure is the set maximum pressure, and the traveling clutch on the inside of the turn is set to the reverse side. Will be driven to. That is, the traveling device on the inside of the turn can be braked by the turning force of the second drive rotating body to turn the machine body, or the left and right traveling devices can be driven in opposite rotational directions to rotate the machine body.

〔発明の効果〕〔The invention's effect〕

後進用摩擦クラッチ、油圧シリンダ及び調圧バルブのた
めに、第2駆動回転体を非伝動状態に切換えると共に第
2駆動回転体を固定するための特別な手段を要しないよ
うに伝動構造を簡略化できると共に、旋回操作が油圧シ
リンダのためのバルブと調圧バルブを操作するだけの容
易な操作ででき、操縦が軽快にできるものを安価に得ら
れるようにできた。
Due to the reverse friction clutch, hydraulic cylinder and pressure regulating valve, the transmission structure is simplified so that the second drive rotor is switched to the non-transmission state and no special means for fixing the second drive rotor is required. At the same time, the turning operation can be performed by simply operating the valve for the hydraulic cylinder and the pressure regulating valve, and the operation can be easily obtained at low cost.

〔実施例〕〔Example〕

次に実施例を示す。 Next, examples will be shown.

第1図に示すように、エンジン出力を、中立を挾んで前
進側と後進側に切換え可能な油圧式無段変速装置(M1
及び入力軸(1)を介してミッションケース(2)に伝
達し、そして、入力軸(1)の回動力を、シフトギア部
材(3)の摺動操作によって3段に切換え可能な走行用
副変速装置(M2)に伝達すると共に、この走行用副変速
装置(M2)の回転出力を機体操向装置(A)を介して左
右のクローラ式走行装置(4),(4)夫々のクローラ
駆動軸(5)に伝達するように構成して、コンバイン用
の走行用伝動構造を構成してある。
As shown in FIG. 1, a hydraulic continuously variable transmission (M 1 ) capable of switching the engine output between forward and reverse with a neutral position.
And a transmission auxiliary gear shift which is transmitted to the transmission case (2) via the input shaft (1), and the rotational power of the input shaft (1) can be switched to three stages by sliding operation of the shift gear member (3). device while transmitting to (M 2), the left and right crawler type traveling device through the machine exercises countercurrent apparatus the rotational output (a) of the traveling auxiliary transmission device (M 2) (4), (4) respectively of the crawler It is configured to be transmitted to the drive shaft (5) to form a traveling transmission structure for a combine.

機体操向装置(A)を構成するに、左右走行装置
(4),(4)の夫々に対して第1図及び第2図に示す
ように構成してある。
In the airframe steering device (A), the left and right traveling devices (4) and (4) are respectively configured as shown in FIGS. 1 and 2.

すなわち、ミッションケース(2)に支軸(6)を介し
て支持されるように取付けた前進伝動ギア(7)を、走
行用副変速装置(M2)の出力軸ギア(8)に直接に咬合
させることによって常に支軸(6)の軸芯(P)の周り
で回動するよう駆動されるように構成し、支軸(6)の
一端側に前記軸芯(P)の周りで回動するように配置し
た後進伝動ギア(9)を逆転伝動ギア機構(10)を介し
て走行用副変速装置(M2)の出力軸ギア(11)に連動さ
せることによって常に前進伝動ギア(7)と同一の軸芯
周りで前進伝動ギア(7)とは逆の回転方向に回動する
よう駆動されるように構成すると共に、支軸(6)の前
進伝動ギア(7)と後進伝動ギア(9)の間に位置する
箇所に伝動ギア部材(12)を相対回動及び摺動自在に取
付けてある。伝動ギア部材(12)にクラッチギア部(1
3)を前進伝動ギア(7)のボス部ギアに係脱するよう
に形成して備えさせることにより、前進伝動ギア(7)
から伝動ギア部材(12)に両者の咬合によって回動力伝
達するように、かつ、伝動ギア部材(12)の摺動に伴っ
て入り切り変化するように前進用クラッチ(FC)を構成
してある。後進用伝動ギア(9)にクラッチハウジング
(14)を一体部品に形成することによって一体に回動す
るように備えると共に、伝動ギア部材(12)に一体形成
のために共に摺動するように備えさせた筒形出力部材
(15)をクラッチハウジング(14)の内部に同芯状に配
置し、そして、クラッチハウジング(14)と出力部材
(15)の間に複数枚の摩擦板(16)‥を有したクラッチ
本体を設けると共に、クラッチ操作部(17)をクラッチ
本体に押圧作用したり作用解除するように形成して伝動
ギア部材(12)に備えさせることにより、後進伝動ギア
(9)の回動力が伝動ギア部材(12)に摩擦伝達される
ように、かつ、伝動ギア部材(12)の摺動に伴って入り
切り変化するように多板式の後進用摩擦クラッチ(RC)
を構成してある。伝動ギア部材(12)はギア伝動機構
(18)を介してクローラ駆動軸(5)に連動すると共に
摺動如何にかかわらずギア伝動機構(18)のギア(18
a)との咬合を維持するように形成してあること、及
び、クラッチギア部(13)及びクラッチ操作部(17)を
一体に摺動するように備えていることにより、走行装置
(4)に連動されたままで軸芯(P)の方向に摺動して
前進用クラッチ(FC)と後進用摩擦クラッチ(RC)をい
ずれもが切りになると共にいずれか一方のみが入りにな
る状態に操作するように構成してある。
That is, the forward transmission gear (7) mounted so as to be supported on the mission case (2) via the support shaft (6) is directly attached to the output shaft gear (8) of the traveling auxiliary transmission (M 2 ). It is configured to be driven so as to always rotate around the shaft center (P) of the support shaft (6) by being engaged, and is rotated around the shaft center (P) to one end side of the support shaft (6). The reverse transmission gear (9) arranged to move is interlocked with the output shaft gear (11) of the traveling auxiliary transmission (M 2 ) via the reverse rotation transmission gear mechanism (10) so that the forward transmission gear (7) is always operated. ), And is configured to be driven so as to rotate in a rotation direction opposite to that of the forward transmission gear (7) around the same shaft center, and the forward transmission gear (7) and the reverse transmission gear of the support shaft (6). A transmission gear member (12) is attached to a portion located between (9) so as to be relatively rotatable and slidable. The transmission gear member (12) has a clutch gear (1
The forward transmission gear (7) is formed by providing the boss portion gear of the forward transmission gear (7) so as to be engaged and disengaged.
The forward clutch (FC) is configured so that the rotary power is transmitted to the transmission gear member (12) by the engagement of the two and the engagement / disengagement is changed as the transmission gear member (12) slides. The reverse transmission gear (9) is provided with a clutch housing (14) as an integral part so as to rotate integrally, and the transmission gear member (12) is provided so as to slide together for integral formation. The cylindrical output member (15) thus arranged is concentrically arranged inside the clutch housing (14), and a plurality of friction plates (16) are provided between the clutch housing (14) and the output member (15). Of the reverse transmission gear (9) by providing the clutch operating portion (17) for pressing and releasing the clutch main body and providing the transmission operating gear member (12) with the clutch operating portion (17). A multi-plate reverse friction clutch (RC) so that rotational force is frictionally transmitted to the transmission gear member (12), and that it turns on and off as the transmission gear member (12) slides.
Is configured. The transmission gear member (12) is interlocked with the crawler drive shaft (5) through the gear transmission mechanism (18), and the gear (18) of the gear transmission mechanism (18) regardless of whether it slides or not.
The traveling device (4) is formed so as to maintain the occlusion with a) and is equipped with the clutch gear portion (13) and the clutch operating portion (17) so as to slide integrally. Sliding in the direction of the shaft core (P) while being linked to, both the forward clutch (FC) and the reverse friction clutch (RC) are disengaged, and only one of them is engaged. It is configured to do.

そして、伝動部材(12)を前進付勢スプリング(19)に
よって前進用クラッチ入り位置に摺動付勢すると共に、
伝動部材(12)の摺動操作のための揺動フォーク(20)
を第3図に示す如くミッションケース(2)の外側に付
設の油圧シリンダ(C)によって操作するように構成
し、この油圧シリンダ(C)を第3図に示す油圧回路に
基いて操作するように構成し、かつ、他方の走行装置
(4)に対する油圧シリンダ(C)の操作用に兼用する
ように構成した電磁制御弁(CV)及び可変リリーフ弁
(RV)に第4図の如き操向レバー(22)を連係させて、
操向レバー(22)による制御弁(CV)及び可変リリーフ
弁(RV)の切換えあるいは調節操作により伝動部材(1
2)を摺動操作することによってクラッチ操作をするよ
うに構成してある。すなわち、操向レバー(22)を枢支
軸芯(X)の周りで機体横方向に揺動させて直進位置
(S)に操作すると、スイッチ操作具(23a)または(2
3b)が操作レバー(22)に対する非接触状態になると共
にスプリング(24)により引張り操作されることによっ
てスイッチ切り操作位置になり、制御弁(CV)の操作ス
イッチ(25a)及び(25b)が切りになって制御弁(CV)
が中立位置になる。このために油圧シリンダ(C)が自
己短縮力のために短縮作動してフォーク軸(21)に付設
のフォーク揺動操作アーム(26)に対して離れた非作用
位置になり、出力部材(12)が前進付勢スプリング(1
9)により摺動操作されて前進用クラッチ(FC)を入り
に操作するのである。そして、操向レバー(22)を直進
位置(S)から機体左側または右側の第1旋回位置
(L1)または(R1)に操作すると、スイッチ操作具(23
a)または(23b)が操向レバー(22)による押圧操作の
ために入り操作位置に切換わり、操作スイッチ(25a)
または(25b)が入りに切換わって制御弁(CV)が旋回
位置に切換わる。この弁切換わりのために油圧シリンダ
(C)が伸長作動して操作アーム(26)を押圧操作し、
このアーム操作によるフォーク操作のために出力部材
(12)が後進用クラッチ側に摺動して前進用クラッチ
(FC)を切りにするのである。この時、可変リリーフ弁
(RV)のリリーフ圧が低圧であり、油圧シリンダ(C)
の操作圧が低圧であるために後進用クラッチ(RC)はま
だ切りに在る。そして、操向レバー(22)を第1旋回位
置(L1)または(R1)からさらに機体左側または右側に
揺動させた第2旋回位置(L2)または(R2)に操作する
と、連動用操作ワイヤ(27)を有する連動機構のために
可変リリーフ弁(RV)のリリーフ圧が設定最大リリーフ
圧に自動的に増圧変化することにより、油圧シリンダ
(C)への給油圧が設定最大給油圧になり、油圧シリン
ダ(C)が出力部材(12)を介して後進用クラッチ(R
C)に作用する入り操作圧が設定最大操作圧になって後
進用クラッチ(RC)が入りになる。操向レバー(22)を
第1旋回位置(L1)または(R1)と第2旋回位置(L2
または(R2)の間に操作すると前記連動機構のために可
変リリーフ弁(RV)のリリーフ弁が設定最大リリーフ圧
より低いリリーフ圧になることにより油圧シリンダ
(C)の給油圧が設定最大給油圧より小になり、油圧シ
リンダ(C)によるクラッチ入り操作圧が設定最大操作
圧より低い入り操作圧になって後進用クラッチ(RC)が
半クラッチ状態になるのである。
Then, the transmission member (12) is slidingly biased to the forward clutch engagement position by the forward biasing spring (19), and
Swing fork (20) for sliding operation of transmission member (12)
Is configured to be operated by a hydraulic cylinder (C) attached to the outside of the mission case (2) as shown in FIG. 3, and this hydraulic cylinder (C) is operated based on the hydraulic circuit shown in FIG. 4 and the electromagnetic control valve (CV) and the variable relief valve (RV) configured to also operate the hydraulic cylinder (C) for the other traveling device (4) as shown in FIG. Link the lever (22),
The transmission member (1) is operated by switching or adjusting the control valve (CV) and the variable relief valve (RV) by the steering lever (22).
The clutch is operated by sliding 2). That is, when the steering lever (22) is swung in the lateral direction of the fuselage around the pivot axis (X) and operated to the straight traveling position (S), the switch operating tool (23a) or (2
3b) is not in contact with the operation lever (22) and is pulled by the spring (24) to be in the switch off operation position, and the operation switches (25a) and (25b) of the control valve (CV) are off. Control valve (CV)
Becomes the neutral position. For this reason, the hydraulic cylinder (C) is shortened by its self-shortening force to a non-acting position apart from the fork swing operation arm (26) attached to the fork shaft (21), and the output member (12 ) Is the forward biasing spring (1
9) It is slid by the operation of the forward clutch (FC). When the steering lever (22) is operated from the straight-ahead position (S) to the first turning position (L 1 ) or (R 1 ) on the left or right side of the machine, the switch operating tool (23
a) or (23b) enters and is switched to the operation position due to the pressing operation by the steering lever (22), and the operation switch (25a)
Or (25b) is switched to ON and the control valve (CV) is switched to the swing position. Due to this valve switching, the hydraulic cylinder (C) is extended to press the operation arm (26),
Due to the fork operation by the arm operation, the output member (12) slides to the reverse clutch side to disengage the forward clutch (FC). At this time, the relief pressure of the variable relief valve (RV) is low and the hydraulic cylinder (C)
The reverse clutch (RC) is still off due to the low operating pressure. When the steering lever (22) is operated from the first turning position (L 1 ) or (R 1 ) to the second turning position (L 2 ) or (R 2 ) which is further swung to the left or right side of the aircraft, The relief pressure of the variable relief valve (RV) is set for the interlocking mechanism having the interlocking operation wire (27). The hydraulic pressure to the hydraulic cylinder (C) is set by automatically increasing the relief pressure to the maximum relief pressure. The maximum hydraulic pressure is reached, and the hydraulic cylinder (C) passes through the output member (12) and the reverse clutch (R
The reverse operation clutch (RC) is turned on when the on / off operation pressure acting on C) reaches the set maximum operation pressure. Move the steering lever (22) to the first turning position (L 1 ) or (R 1 ) and the second turning position (L 2 ).
Or when operated during (R 2 ), the relief valve of the variable relief valve (RV) becomes a relief pressure lower than the set maximum relief pressure due to the interlocking mechanism, so that the supply hydraulic pressure of the hydraulic cylinder (C) becomes the set maximum supply pressure. The hydraulic pressure becomes lower than the hydraulic pressure, the clutch operating pressure by the hydraulic cylinder (C) becomes lower than the set maximum operating pressure, and the reverse clutch (RC) enters the half-clutch state.

要するに、操向レバー(22)を直進位置(S)に操作す
ると、一対の前進用クラッチ(FC),(FC)のいずれも
が入りになって前進伝動ギア(7)の回動力を一方の伝
動ギア部材(12)によりギア伝動機構(18)を介して一
方のクローラ駆動軸(5)に、かつ、他方の伝動ギア部
材(12)によりギア伝動機構(18)を介して他方のクロ
ーラ駆動軸(5)に夫々伝達し、機体が直進前進するよ
うに左右走行装置(4),(4)を前進側に駆動するの
である。そして、操向レバー(22)を第1旋回位置
(L1)または(R1)に操作すると、その操作方向に対応
する側の前進用クラッチ(FC)及び後進用クラッチ(R
C)が切りになって一方のクローラ駆動軸(5)に対す
る伝動が停止し、操向レバー(22)の位置する側に向か
って機体が旋回走行するように左右走行装置(4),
(4)の一方を遊転状態にしながら他方を前進側に駆動
するのである。そして、操向レバー(22)を第2旋回位
置(L2)または(R2)に操作すると、その操作方向に対
応する側の後進用クラッチ(RC)が入りになって後進伝
動ギア(9)の回動力を伝動ギア部材(12)によりギア
伝動機構(18)を介して一方のクローラ駆動軸(5)に
伝達し、操向レバー(22)の位置する側に機体が信地旋
回するように左右走行装置(4),(4)の一方を後進
側に、かつ、他方を前進側に夫々駆動するのである。そ
して、操向レバー(22)を第1旋回位置(L1)または
(R1)と第2旋回位置(L2)または(R2)の間の適切な
位置に操作すると、その操作方向に対応する側の後進用
クラッチ(RC)が半クラッチになり、操向レバー(22)
の位置する側に機体が旋回するように、かつ、旋回外側
の走行装置(4)による引きずり作用にかかわらず旋回
内側の走行装置(4)が回動しないように左右走行装置
(4),(4)の一方を前進側に駆動し、他方に後進駆
動力を半クラッチ伝達するのである。
In short, when the steering lever (22) is operated to the straight-ahead position (S), both the pair of forward clutches (FC) and (FC) are engaged, and the turning power of the forward transmission gear (7) is changed to one of the two. The transmission gear member (12) drives the one crawler drive shaft (5) via the gear transmission mechanism (18), and the other transmission gear member (12) drives the other crawler drive via the gear transmission mechanism (18). The left and right traveling devices (4), (4) are driven to the forward side so that the machine body advances straight ahead by transmitting them to the shafts (5) respectively. When the steering lever (22) is operated to the first turning position (L 1 ) or (R 1 ), the forward clutch (FC) and the reverse clutch (R) on the side corresponding to the operating direction.
C) is turned off so that the power transmission to one crawler drive shaft (5) is stopped, and the left and right traveling devices (4), so that the aircraft turns around toward the side where the steering lever (22) is located,
(4) The other is driven to the forward side while one is in the idling state. Then, when the steering lever (22) is operated to the second turning position (L 2 ) or (R 2 ), the reverse clutch (RC) on the side corresponding to the operation direction is engaged and the reverse transmission gear (9). ) Is transmitted to the one crawler drive shaft (5) by the transmission gear member (12) via the gear transmission mechanism (18), and the aircraft pivots to the side where the steering lever (22) is located. Thus, one of the left and right traveling devices (4) and (4) is driven to the reverse side and the other is driven to the forward side. When the steering lever (22) is operated to an appropriate position between the first turning position (L 1 ) or (R 1 ) and the second turning position (L 2 ) or (R 2 ), the operation direction is changed. The reverse clutch (RC) on the corresponding side becomes a half clutch, and the steering lever (22)
The left and right traveling devices (4), () so that the vehicle body turns to the side on which the vehicle is located, and the traveling device (4) on the inside of the turning does not rotate regardless of the drag action of the traveling device (4) on the outside of the turning. 4) One is driven to the forward side, and the reverse driving force is transmitted to the other half clutch.

操向レバー(22)と可変リリーフ弁(RV)の連動機構を
構成するに、第4図に示すように、操向レバー(22)を
直進位置(S)から揺動操作するに伴い、レバー枢支部
材(28)が操向レバー(22)と相対揺動可能に枢支する
一対の揺動リンク(29a),(29b)の一方を操向レバー
(22)に付設してある操作ピン(30)が押圧揺動操作す
るように構成し、そして、操作ワイヤ(27)のアウター
ワイヤとインナーワイヤを一対の揺動リンク(29a),
(29b)に各別に連結すると共に、操向レバー(22)が
直進位置(S)になると揺動リンク間隔が設定間隔に自
動的に戻るように一対の揺動リンク(29a),(29b)を
スプリング(31)により連結し、そしてこれらの連結に
もかかわらず、一方の揺動リンク(29a)または(29b)
が操向レバー(22)によって揺動操作される際にはレバ
ー枢支部材(28)に付設してあるストッパーピン(32)
が他方の揺動リンク(29b)または(29a)を揺動しない
ように受止め支持するように構成することにより、操向
レバー(22)の揺動に伴い、一方の揺動リンク(29a)
または(29b)がレバー操作力のためにインナーワイヤ
またはアウターワイヤを操作して可変リリーフ弁(RV)
の揺動操作部(33)をリリーフ圧増大側に操作したり、
スプリング(31)の付勢力のために揺動操作部(33)を
リリーフ圧減少側に復元操作するようにしてある。
As shown in FIG. 4, in constructing the interlocking mechanism of the steering lever (22) and the variable relief valve (RV), as the steering lever (22) is swung from the straight traveling position (S), the lever is moved. An operation pin in which one of a pair of swing links (29a) and (29b) in which the pivot member (28) pivotally supports the steering lever (22) so as to be capable of relative swing is attached to the steering lever (22). The operation wire (27) is constituted by a pair of rocking links (29a) and an outer wire and an inner wire of the operation wire (27).
A pair of swing links (29a), (29b) are connected to each (29b), and when the steering lever (22) reaches the straight position (S), the swing link interval automatically returns to the set interval. Are connected by a spring (31), and in spite of these connections, one swing link (29a) or (29b)
When the steering lever (22) is swung, the stopper pin (32) attached to the lever pivot member (28)
Is configured to receive and support the other swinging link (29b) or (29a) so as not to swing, so that the one swinging link (29a) is moved along with the swinging of the steering lever (22).
Or (29b) operates inner wire or outer wire for lever operating force and variable relief valve (RV)
The rocking operation part (33) of is operated to the relief pressure increasing side,
The swinging operation part (33) is restored to the relief pressure decreasing side by the biasing force of the spring (31).

尚、第4図に示すスプリング(34)は、後進用クラッチ
(RC)が入りになり始めると、操向レバー(22)による
スプリング操作部材(35)の押圧摺動操作のために引張
り弾性変形操作され、操向レバー(22)の操作抵抗をそ
れまでの操作抵抗よりも大にし、後進用クラッチ(RC)
がきき始めたことを操縦者に認識させるためのものであ
る。
The spring (34) shown in FIG. 4 is elastically deformed by tension when the reverse clutch (RC) starts to be engaged because the steering lever (22) presses and slides the spring operation member (35). When operated, the operating resistance of the steering lever (22) is made larger than the previous operating resistance, and the reverse clutch (RC)
This is for making the operator recognize that the sprinting has begun.

〔別実施例〕[Another embodiment]

前進伝動ギア(7)、後進伝動ギア(9)及び伝動部材
(12)をチェーンスプロケット等に替えて実施してもよ
い。したがって、これらを第1駆動回転体(7)、第2
駆動回転体(9)、回転伝動体(12)と称する。
The forward transmission gear (7), the reverse transmission gear (9) and the transmission member (12) may be replaced with a chain sprocket or the like. Therefore, these are the first drive rotor (7) and the second drive rotor (7).
These are referred to as the driving rotary body (9) and the rotary transmission body (12).

可変リリーフ弁(RV)に替えて減圧式調圧弁を油圧ポン
プと油圧シリンダの間に設けて実施してもよいのであ
り、これらを調圧弁(RV)と称する。
A pressure reducing type pressure regulating valve may be provided between the hydraulic pump and the hydraulic cylinder instead of the variable relief valve (RV), and these are referred to as a pressure regulating valve (RV).

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造
に限定されるものではない。
It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

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

図面は本発明に係る作業車の走行用伝動構造の実施例を
示し、第1図は走行用伝動構造の断面図、第2図は後進
用伝動部の断面図、第3図は油圧回路図、第4図は操向
レバー配設部の一部切欠き後面図である。 (4)……走行装置、(7)……第1駆動回転体、
(9)……第2駆動回転体、(12)……回転伝動体、
(C)……油圧シリンダ、(FC)……前進用クラッチ、
(RC)……後進用クラッチ、(RV)……調圧弁、(P)
……軸芯。
The drawings show an embodiment of a traveling transmission structure for a work vehicle according to the present invention. FIG. 1 is a sectional view of the traveling transmission structure, FIG. 2 is a sectional view of a reverse transmission portion, and FIG. 3 is a hydraulic circuit diagram. FIG. 4 is a rear view of the steering lever disposition portion with a part thereof cut away. (4) ...... Traveling device, (7) ...... First drive rotor,
(9) …… Second drive rotating body, (12) …… Rotating transmission body,
(C) …… hydraulic cylinder, (FC) …… forward clutch,
(RC): Reverse clutch, (RV): Pressure regulator, (P)
…… Axial core.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】左右の走行装置(4),(4)夫々に対
し、同一の軸芯(P)の周りで回動する前進動力伝達用
の第1駆動回転体(7)と後進動力伝達用の第2駆動回
転体(9)との間に、回転伝動体(12)を前記走行装置
(4)に連動されたままで前記軸芯(P)の方向に摺動
自在に設け、前記回転伝動体(12)と前記第1駆動回転
体(7)の間に前進用クラッチ(FC)を、かつ、前記回
転伝動体(12)と前記第2駆動回転体(9)の間にディ
スク式の後進用摩擦クラッチ(RC)を夫々、前記回転伝
動体(12)の摺動によって入り切り変化すると共に択一
的に入りになる状態で設け、前記後進用摩擦クラッチ
(RC)に対する入り操作位置に前記回転伝動体(12)を
操作する油圧シリンダ(C)、及び、この油圧シリンダ
(C)に対する給油圧を変更調節して前記回転伝動体
(12)による前記後進用摩擦クラッチ(RC)の入り操作
圧を変更する調圧弁(RV)を設けてある作業車の走行用
伝動構造。
1. A first drive rotating body (7) for forward power transmission, which rotates about the same axis (P), and a reverse power transmission to the left and right traveling devices (4), (4) respectively. A rotation transmission body (12) is provided slidably in the direction of the shaft core (P) while being interlocked with the traveling device (4) between the rotation drive body (9) and the second drive rotation body (9). A forward clutch (FC) is provided between the transmission body (12) and the first drive rotating body (7), and a disc type is provided between the rotary transmission body (12) and the second drive rotating body (9). The rearward traveling friction clutch (RC) is provided in such a state that the rearward traveling friction clutch (RC) is selectively engaged and disengaged by sliding of the rotary transmission body (12), and is placed in an engagement operation position with respect to the rearward traveling friction clutch (RC). A hydraulic cylinder (C) for operating the rotary transmission body (12) and a hydraulic pressure supplied to the hydraulic cylinder (C) are changed. A transmission structure for traveling of a work vehicle, which is provided with a pressure regulating valve (RV) that is adjusted to change the operation pressure of the reverse friction clutch (RC) by the rotary transmission body (12).
JP1277764A 1989-10-24 1989-10-24 Transmission structure for traveling of work vehicle Expired - Fee Related JPH0790791B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1277764A JPH0790791B2 (en) 1989-10-24 1989-10-24 Transmission structure for traveling of work vehicle
KR1019900017022A KR940009858B1 (en) 1989-10-24 1990-10-24 Transmission structure for running of working vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1277764A JPH0790791B2 (en) 1989-10-24 1989-10-24 Transmission structure for traveling of work vehicle

Publications (2)

Publication Number Publication Date
JPH03139473A JPH03139473A (en) 1991-06-13
JPH0790791B2 true JPH0790791B2 (en) 1995-10-04

Family

ID=17588010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1277764A Expired - Fee Related JPH0790791B2 (en) 1989-10-24 1989-10-24 Transmission structure for traveling of work vehicle

Country Status (1)

Country Link
JP (1) JPH0790791B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2627816B2 (en) * 1990-10-11 1997-07-09 三菱農機株式会社 Steering device for traveling work vehicle
JP6651099B2 (en) * 2015-03-30 2020-02-19 株式会社 神崎高級工機製作所 Steering control system

Also Published As

Publication number Publication date
JPH03139473A (en) 1991-06-13

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