JPH0231066A - Control structure for running of working vehicle - Google Patents
Control structure for running of working vehicleInfo
- Publication number
- JPH0231066A JPH0231066A JP63180610A JP18061088A JPH0231066A JP H0231066 A JPH0231066 A JP H0231066A JP 63180610 A JP63180610 A JP 63180610A JP 18061088 A JP18061088 A JP 18061088A JP H0231066 A JPH0231066 A JP H0231066A
- Authority
- JP
- Japan
- Prior art keywords
- clutch
- valve
- operating
- operated
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007935 neutral effect Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 17
- 230000037431 insertion Effects 0.000 claims 2
- 238000003780 insertion Methods 0.000 claims 2
- 230000000740 bleeding effect Effects 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、前後進切換え、あるいは走行変速のための複
数の走行伝動用摩擦クラッチを各別に操作する複数の油
圧ピストンを設けると共に、これら油圧ピストンを択一
的にクラッチ入り側に操作する操作弁の操作具を人為操
作自在に設け、前記油圧ピストンをクラッチ入り側に操
作するための油圧を設定最高圧に時間経過に伴って増大
させる漸次昇圧機構を受けた作業車の走行用操作構造に
関する。Detailed Description of the Invention [Industrial Application Field] The present invention provides a plurality of hydraulic pistons that separately operate a plurality of friction clutches for driving transmission for forward/reverse switching or changing speeds, and An operating tool for an operating valve that selectively operates the piston toward the clutch engagement side is provided, and the hydraulic pressure for operating the hydraulic piston toward the clutch engagement side is gradually increased over time to a set maximum pressure. This invention relates to a driving operation structure for a work vehicle equipped with a boost mechanism.
上記作業車は、クラッチの切り状態から設定最高圧の入
り状態への切換えが漸次昇圧機構の作用のために比較的
緩速で行われ、クラッチの入り作動に起因する発進衝撃
や増減速衝撃の発生が緩和されるように配慮されたもの
である。In the above-mentioned work vehicle, the switching from the clutch disengaged state to the set maximum pressure engaged state is performed at a relatively slow speed due to the action of the gradual pressure increase mechanism. This was designed to reduce the risk of the outbreak.
この種作業車において、従来、クラッチを入りに操作す
るに当たり、油圧ピストンを内装した油室の油圧が完全
に抜けている切りの状態からすることによってのみ、漸
次昇圧機構が十分に作用するようになっている。Conventionally, in this type of work vehicle, when operating the clutch, the gradual pressure increase mechanism was only able to function sufficiently by starting from the disengaged state where the oil pressure in the oil chamber containing the hydraulic piston was completely released. It has become.
従来、操作具をクラッチ入り位置から切り位置に切換え
操作した直後で操作具にまだ手を添えているときに機体
が揺れ動き、その機体動に起因する身体の動きのために
操作具が先に在ったクラッチ入り位置に再操作される等
、切り操作されたクラッチを短時間内に入れ戻す操作具
操作がされた場合、操作弁が中立位置に切換わってから
その位置に在る時間が極く短時間で油室の圧抜けが十分
にされないうちにその油室に再度給油されることになり
、その結果、−度切り側に操作されたクラッチが設定最
高圧の入り状態に急速に戻り、衝撃なりラッチ入りのた
めに機体振動が発生したり、機体が急発進や急加速をす
ることがあった。Conventionally, immediately after switching the operating tool from the clutch engaged position to the clutch disengaged position, the aircraft would shake while the hand was still on the operating tool, and the operating tool would be located first due to the body movement caused by the aircraft movement. If the disengaged clutch is operated to return it to the engaged position within a short period of time, such as when the clutch is re-operated to the engaged position, the time the operating valve remains in that position after switching to the neutral position may be extremely long. Before the pressure in the oil chamber can be sufficiently released in a short time, the oil chamber is refilled with oil, and as a result, the clutch that was operated to the - degree-off side quickly returns to the applied state of the maximum set pressure. The impact or latching may cause the aircraft to vibrate, or the aircraft may suddenly start or accelerate.
本発明の目的は、前記したクラッチ入れ戻し操作がされ
た場合でも、漸次昇圧機構の付設の本来目的が達成でき
るようにすることにある。An object of the present invention is to enable the original purpose of providing a gradual pressure increase mechanism to be achieved even when the above-mentioned clutch engagement/retraction operation is performed.
本発明の特徴構成は、冒記した作業車の走行用操作構造
において、走行伝動用摩擦クラッチのうち切り操作され
たクラッチを入りに戻すための操作具操作が切り操作時
から設定時間経過するまでにされたことを検出する入れ
戻し操作検出手段を設けると共に、この入れ戻し操作検
出手段が前記検出をすると自動的に入れ戻し用の操作具
作動に優先して前記操作弁を中立位置に維持操作する油
圧抜き手段を設けてあることにある。そして、その作用
及び効果は次のとおりである。The characteristic configuration of the present invention is that, in the above-mentioned traveling operation structure for a work vehicle, the operating tool for returning the disengaged clutch of the traveling transmission friction clutch to the engaged state is operated until a set time elapses from the time of the disengaged operation. In addition, when the reversing operation detecting means detects that the reversing operation has been performed, the reversing operation detecting means automatically maintains the operating valve in the neutral position with priority over the operation of the retracting operating tool. The reason is that a hydraulic pressure release means is provided. The functions and effects thereof are as follows.
設定最高圧の入り状態に在るクラッチを一度切り操作し
た後に再度入りにする際に漸次昇圧機構が所望どおり作
用するようにするための圧抜けに要する時間を前記設定
時間として設定し、さらには、入れ戻し操作検出手段が
所定の検出をしてから前記設定時間に等しい時間が経過
するまでの間だけ、あるいは、その時間が経過してから
も入れ戻し用の操作具操作が再度されるまで、操作弁を
中立位置に維持操作するところの操作弁操作をするよう
に油圧抜き手段を構成する。すると、操作具がクラッチ
入り位置に操作してから前記設定時間が経過しないうち
にクラッチ入り位置に戻し操作されでも、油圧抜き手段
が操作弁を直ちにはクラッチ入り位置に切換えさせない
で中立位置に維持して先のクラッチ入り操作時に供給さ
れていた油圧が十分に抜は出るようする。そして、この
圧抜けのために漸次昇圧機構が所望どおり作用する状態
になると、既にクラッチ入り位置に操作されでいる操作
具からの情報のために自動的に、あるいは操作具操作が
再度されるに伴い、操作弁がクラッチ入り位置に切換え
られてクラッチを再度入りに漸次昇圧機構の作用のため
に緩速で切換える。The set time is set as the time required for the pressure to be released so that the gradual pressure increase mechanism operates as desired when the clutch in the applied state of the set maximum pressure is once disengaged and then re-engaged. , only until a time equal to the set time has elapsed after the inserting/returning operation detection means makes a predetermined detection, or even after that time, until the inserting/returning operation tool is operated again. The hydraulic pressure release means is configured to operate the operating valve to maintain the operating valve in the neutral position. Then, even if the operating tool is operated to the clutch engaged position and then returned to the clutch engaged position before the set time elapses, the hydraulic pressure releasing means does not immediately switch the operating valve to the clutch engaged position and maintains it in the neutral position. Then, make sure that the hydraulic pressure that was supplied during the previous clutch engagement operation is sufficiently released. When the gradual pressure increase mechanism is activated as desired due to this pressure release, it is automatically activated based on the information from the operating tool that has already been operated to the clutch engagement position, or when the operating tool is operated again. Accordingly, the operating valve is switched to the clutch-engaged position, and the clutch is gradually switched slowly to engage the clutch due to the action of the pressure increasing mechanism.
入れ戻し操作検出手段及び油圧抜き手段のために、−度
切り操作されたクラッチの入れ戻し操作がされても漸次
昇圧機構が確実に作用してクラッチが緩速で入りになり
、クラッチ入りに伴う機体の振動及び急激な発進や増減
速が少ない安全な状態で作業したり運転できるようにな
った。Because of the engagement/return operation detection means and the hydraulic pressure releasing means, even if the clutch is engaged/returned after it has been turned off, the gradual pressure increase mechanism will work reliably and the clutch will engage at a slow speed. The machine can now be operated and operated in a safe manner with less vibration, sudden starts, increases and decelerations.
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（ε）のクランクシャフ
ト（１）の回動力がフライホイール（２〉を介してトル
クコンバータ（３）と、このトルクコンバータ（３）の
出力筒袖（４）を同芯状に貫通させである伝動軸（５）
とに伝達され、トルクコンバータ（３）の回転出力が前
後進切換え装置（６）に伝達されると共にこの前後進切
換え装置（６）の回転出力が走行用ギアトランスミッシ
ョン（７）を介して走行装置（８）に伝達されるように
構成しである。そして、伝動軸（５）の回動力がＰＴＯ
ギアトランスミッション（９）を介して動力取出し軸（
１０）に伝達されるように構成し、もって、農用トラク
ターの走行用及び連結作業装置用の伝動構造を構成しで
ある。As shown in Fig. 1, the rotational force of the crankshaft (1) of the engine (ε) passes through the flywheel (2) to the torque converter (3) and the output sleeve (4) of this torque converter (3). Transmission shaft (5) that runs concentrically through the
The rotational output of the torque converter (3) is transmitted to the forward/reverse switching device (6), and the rotational output of this forward/reverse switching device (6) is transmitted to the traveling gear via the traveling gear transmission (7). (8). Then, the rotational force of the transmission shaft (5) is PTO
The power take-off shaft (
10), thereby configuring a transmission structure for the traveling of the agricultural tractor and the connected working device.
前後進切換え装置（６）を構成するに、前記出力筒軸（
４）との一体物品に形成の入力筒軸（１１）にクラッチ
ボデー（１２）を−休園動可能に取付け、このクラッチ
ボデー（１２）の一端側と、伝動軸（５）に外嵌した出
力筒袖（１３）に一体回転可能に取付けた回転体（１４
）との間に多板式摩擦クラッチ本体を設けて、前進伝動
クラッチ（ＦＣ）を構成すると共に、前記クラッチボデ
ー（１２）の他端側と、入力筒袖（１１）に相対回転可
能に取付けた第１伝動ギア（１６）との間に多板式摩擦
クラッチ本体を設けて、後進伝動クラッチ（ＲＣ）を構
成し、そして、前進伝動クラッチ（ＦＣ）が入り操作さ
れると、人力筒袖（１１）の回動力が前進伝動クラッチ
（ＦＣ）を介して出力筒軸（１３）に正転伝達されるよ
う前進伝動状態になり、後進伝動クラッチ（ＲＣ）が入
り操作されると、この後進伝動クラッチ（ＲＣ）、前記
第１伝動ギア（１６）に逆転ギア（図示せず）を介して
連動させた第２伝動ギア（１８）、この第２伝動ギア（
１８）の回転支軸（１９）に継手（２０）をして回転支
軸（２１）を−休園動可能に連結することによって第２
伝動ギア（１８）に連動させた第３伝動ギア（２２）、
この第３伝動ギア（２２）に咬合させると共に出力筒軸
（１３）に一体回転可能に取付けた第４伝動ギア（２３
）を介して入力筒軸（１１）の回動力が出力筒軸（１３
）に逆転伝達されるよう後進伝動状態になるように構成
しである。To configure the forward/reverse switching device (6), the output cylinder shaft (
A clutch body (12) is movably attached to the input cylinder shaft (11) formed as an integrated article with the clutch body (12), and an output shaft externally fitted on one end side of the clutch body (12) and the transmission shaft (5). A rotating body (14) attached to the sleeve sleeve (13) so as to be able to rotate integrally with the tube sleeve (13).
) to constitute a forward transmission clutch (FC), and a multi-disc friction clutch main body is provided between the clutch body (12) and the input sleeve (11) so as to be relatively rotatable. A multi-disc friction clutch body is provided between the first transmission gear (16) and the reverse transmission clutch (RC), and when the forward transmission clutch (FC) is engaged and operated, the manual transmission clutch (11) is operated. The forward transmission state is established so that the rotational force is transmitted to the output cylinder shaft (13) in the normal rotation via the forward transmission clutch (FC), and when the reverse transmission clutch (RC) is engaged and operated, this reverse transmission clutch (RC ), a second transmission gear (18) interlocked with the first transmission gear (16) via a reverse gear (not shown), this second transmission gear (
18) by attaching a joint (20) to the rotational support shaft (19) and connecting the rotational support shaft (21) so as to be movable.
a third transmission gear (22) interlocked with the transmission gear (18);
A fourth transmission gear (23) is engaged with this third transmission gear (22) and is attached to the output cylinder shaft (13) so as to be integrally rotatable.
), the rotational force of the input cylinder shaft (11) is transferred to the output cylinder shaft (13
) is configured to be in a reverse transmission state so that reverse transmission is performed.
前後進切換え装置（６）の操作を可能にするに、第１図
に示すように、前進伝動クラッチ（ＦＣ）をクラッチボ
デー（１２）に内装の第１油圧ピストン（２４）により
操作し、後進伝動クラッチ（ＲＣ）をクラッチボデー（
１２）に内装の第２油圧ピストン（２５）により操作す
るように構成すると共に、第１油圧ピストン（２４）を
内装しである油室（２６）及び第２油圧ピストン（２５
）を内装しである油室（２７）に第２図に示す如く１つ
の電磁操作弁（２８）を接続しである。そして、操作弁
（２８）の操作回路（２９）にマイクロコンピュータ（
Ｃ）で成る前後進切換え手段（３０）、検出スイッチ（
３１ａ）及び（３１ｂ）を介して手動レバー式の前後進
切換え具（３２）を連係させて、この前後進切換え具（
３２）の人為揺動操作による操作弁（２８）の切換え操
作により、前進伝動クラッチ（ＦＣ）及び後進伝動クラ
ッチ（ＲＣ）を操作するように構成しである。To enable the operation of the forward/reverse switching device (6), as shown in Fig. 1, the forward transmission clutch (FC) is operated by the first hydraulic piston (24) inside the clutch body (12), and the reverse Connect the transmission clutch (RC) to the clutch body (
12) is configured to be operated by a second hydraulic piston (25) internally installed, and the first hydraulic piston (24) is operated by an internally installed oil chamber (26) and a second hydraulic piston (25).
), one electromagnetic operated valve (28) is connected to the internal oil chamber (27) as shown in FIG. A microcomputer (
C), a forward/reverse switching means (30) consisting of a detection switch (
31a) and (31b), the manual lever-type forward/reverse switching tool (32) is linked to the forward/reverse switching tool (31a) and (31b).
32) The forward transmission clutch (FC) and the reverse transmission clutch (RC) are configured to be operated by the switching operation of the operating valve (28) by the artificial rocking operation.
すなわち、検出スイッチ（３１ａ）及び（３１ｂ）は前
後進切換え具（３２）の接触及び離間によって操作され
るように構成してあり、前後進切換え手段（３０）は検
出スイッチ（３１ａ）及び＜３１ｂ）からの情報に基い
て前後進切換え具（３２）の操作された位置が中立位置
（Ｎ）、前進位置（Ｆ）及び後進位置（Ｒ）のいずれで
あるかを判断するようにしである。そして、前後進切換
え具＜３２）が切換え操作されると、前後進切換え手段
（３０）が前記判断の結果に基いて自動的に操作回路（
２９）に所定の操作弁切換え信号を出力することにより
、操作弁（２８）を前後進切換え具（３２）の操作され
た位置に対応する位置に操作するようにしてあり、前後
進切換え具（３２）を前進位置（Ｆ）に操作すると、操
作弁（２８）が油室（２６）に給油して第１油圧ピスト
ン（２４）をクラッチ入り側に操作すると共に、油室（
２７）の圧抜けを可能にして第２油圧ピストン（２５）
をスプリング（３３）によりクラッチ切り側に操作する
のである。そして、前後進切換え具（３２）を後進位置
（Ｒ）に操作するど、操作弁（２８）が油室（２７）に
給油して第２油圧ピストン（２５）をクラッチ入り側に
操作すると共に油室（２６）の圧抜けを可能にして第１
油圧ピストン（２４）をスプリング（３４）によりクラ
ッチ切り側に操作するのである。That is, the detection switches (31a) and (31b) are configured to be operated by contact and separation of the forward/reverse switching tool (32), and the forward/reverse switching means (30) is operated by the detection switch (31a) and <31b. ), it is determined whether the operated position of the forward/reverse switching tool (32) is a neutral position (N), a forward position (F), or a reverse position (R). Then, when the forward/reverse switching tool <32) is operated to switch, the forward/reverse switching means (30) automatically operates the operating circuit (32) based on the result of the judgment.
By outputting a predetermined operating valve switching signal to (29), the operating valve (28) is operated to a position corresponding to the operated position of the forward/reverse switching tool (32). 32) to the forward position (F), the operation valve (28) supplies oil to the oil chamber (26) and operates the first hydraulic piston (24) to the clutch engagement side, and the oil chamber (
27) to allow pressure relief from the second hydraulic piston (25).
is operated to the clutch disengage side by a spring (33). When the forward/reverse switching device (32) is operated to the reverse position (R), the operation valve (28) supplies oil to the oil chamber (27) and operates the second hydraulic piston (25) to the clutch engagement side. The first valve allows pressure relief from the oil chamber (26)
The hydraulic piston (24) is operated by the spring (34) toward the clutch release side.
第２図に示すように、操作弁（２８）に電磁比例減圧弁
（３５）を介して給油するように構成し、電磁比例減圧
弁（３５）の操作回路（３６）を前記前後進切換え手段
（３０）に連係させると共に、前後進切換え具（３２）
を前進位置（Ｆ）または後進位置（Ｒ）に操作すると、
自動的に、前後進切換え手段（３０）が操作回路（３６
）に所定の操作弁切換え信号を出力すると同時に、操作
回路（３６）に電磁比例減圧弁（３５）を作動させるべ
き信号を出力するようにしである。つまり、操作弁（２
８）がクラッチ入り位置（ｆ）または（ｒ） に操作さ
れると同時に電磁比例減圧弁（３５）が作動し、この電
磁比例減圧弁（３５）の作用のために、第３図に示す如
く油圧ピストン（２４）及び（２５）をクラッチ入り側
に操作するための油圧（Ｐ）が設定最高圧（ｐｍａｘ）
に、操作弁（２８）がクラッチ入り位置（ｆ）または（
ｒ）になってからの時間（ｔｌ）経過に伴って増大し、
クラッチ（ＦＣ）及び（ＲＣ）が設定最高圧の入りに緩
速でなってクラッチ入りに伴う衝撃発生が緩和させるよ
うに配慮しである。As shown in FIG. 2, the operating valve (28) is configured to be supplied with oil via an electromagnetic proportional pressure reducing valve (35), and the operating circuit (36) of the electromagnetic proportional pressure reducing valve (35) is connected to the forward/reverse switching means. (30) and the forward/reverse switching tool (32)
When the is operated to the forward position (F) or reverse position (R),
Automatically, the forward/reverse switching means (30) is connected to the operating circuit (36).
) to output a predetermined operation valve switching signal, and at the same time output a signal to operate the electromagnetic proportional pressure reducing valve (35) to the operation circuit (36). In other words, the operation valve (2
8) is operated to the clutch engagement position (f) or (r), the electromagnetic proportional pressure reducing valve (35) operates, and due to the action of this electromagnetic proportional pressure reducing valve (35), as shown in Fig. 3. The hydraulic pressure (P) for operating the hydraulic pistons (24) and (25) to the clutch engagement side is the set maximum pressure (pmax)
When the operation valve (28) is in the clutch engaged position (f) or (
r) increases with the passage of time (tl),
Care has been taken to ensure that the clutches (FC) and (RC) enter the set maximum pressure at a slow speed to alleviate the shock that occurs when the clutches engage.
操作回路（２９）及び（３６）にマイクロコンピュータ
（Ｃ）で成る油圧抜き手ｆｆ１（３７）を連係させると
共に、この油圧抜き手段（３７）が入れ戻し操作検出手
段（３８）からの情報に基いて油圧抜き手段（３７）が
必要時に自動的に作動するように構成して、前進伝動ク
ラッチ（ＦＣ）と後進伝動クラッチ（ＲＣ）のうち切り
操作した一方のクラッチ（ＦＣ）または（ＲＣ）を他方
のクラッチ（ＲＣ）または（ＦＣ）を入りにするまでに
再度入りに操作する入れ戻し操作が、切り操作時からの
経過時間が比較的短かい間にされた際にも、電磁比例減
圧弁（３５）のためにクラッチ（ＦＣ）または（ＲＣ）
が緩速で入りになるように構成しである。The operating circuits (29) and (36) are linked with a hydraulic pressure drainer ff1 (37) made of a microcomputer (C), and this hydraulic pressure release means (37) is operated based on the information from the reversing operation detection means (38). The hydraulic pressure releasing means (37) is configured to operate automatically when necessary, and one of the forward transmission clutches (FC) and reverse transmission clutches (RC) which is disengaged is disengaged. Even if the on/off operation to engage/return the other clutch (RC) or (FC) is performed within a relatively short period of time since the disengagement, the electromagnetic proportional pressure reducing valve (35) for clutch (FC) or (RC)
The structure is such that the input speed is slow.
すなわち、入れ戻し操作検出手段（３８）はマイクロコ
ンピュータ（Ｃ）で成り、記憶手段（３９）、検出手段
本体（４０）及びタイマー手段（４１）の夫々により構
成しである。そして、記憶手段（３９）は、検出スイッ
チ（３１ａ）及び（３１ｂ）からの情報に基いて前後進
切換え具（３２）が位置する操作位置を判断し、そして
、前後進切換え具（３２）が切換え操作されて新たな操
作位置としての前進位置（Ｆ）または後進位置（Ｒ）に
達するまでそれ以前に在った旧の操作位置としての後進
位置（Ｒ）または前進位置（Ｆ）を記憶するように、か
つ、前後進切換え具（３２）が断操作位置に達する毎に
その新たな前進位置（Ｆ）または後進位置（Ｒ）を記憶
すべき操作位置として自動的に記憶し直すようにしであ
る。そして、検出手段本体（４０）は、検出スイッチ（
３１ａ）及び（３１ｂ）からの情報に基いて前後進切換
え具（３２）が中立位置（Ｎ）なった後に初めて操作さ
れた断操作位置が前進位置（Ｆ） と後進位置（Ｒ）の
いずれかを検出すると共に、この検出操作位置と前記記
憶手段（３９）による記憶データとを比較して前後進切
換え具（３２）が操作された断操作位置と、前後進切換
え具（３２）が中立位置（Ｎ）を経過する以前に在った
旧の操作位置とが同一であるか否かを判別することによ
り、前後進切換え具（３２）のされた操作がクラッチ（
ＦＣ）または（ＲＣ）の入れ戻しのためのものであるか
否かを検出するようにし、また、検出スイッチ（３１ａ
）及び（３１ｂ）からの情報とタイマー手段（４１）か
らの情報とに基いて前後進切換え具（３２）が中立位置
（Ｎ）に操作されてから前進位置（Ｆ）または後進位置
（Ｒ） に操作されるまでに経過した時間を計測する
と共に、この計測時間と、予め設定入力しである設定時
間とを比較して計測時間が設定時間未満であるか否かを
判断することにより、クラッチ（ＦＣ）または（ＲＣ）
の入れ戻しのためにされた前後進切換え具（３２）の操
作が切り操作時から前記設定時間を経過するまでにされ
たか否かを検出するようにしである。That is, the reversing operation detection means (38) is made up of a microcomputer (C), and is composed of a storage means (39), a detection means main body (40), and a timer means (41), respectively. Then, the storage means (39) determines the operation position where the forward/reverse switching tool (32) is located based on the information from the detection switches (31a) and (31b), and determines the operating position where the forward/reverse switching tool (32) is located. The reverse position (R) or forward position (F) as the old operating position is stored until the switching operation reaches the forward position (F) or reverse position (R) as the new operating position. In addition, each time the forward/reverse switching tool (32) reaches the disconnection operation position, the new forward position (F) or reverse position (R) is automatically re-memorized as the operation position to be memorized. be. The detection means main body (40) includes a detection switch (
Based on the information from 31a) and (31b), the disconnection position operated for the first time after the forward/reverse switching device (32) has reached the neutral position (N) is either the forward position (F) or the reverse position (R). At the same time, this detected operation position is compared with the data stored in the storage means (39) to determine the disconnection operation position where the forward/reverse switching tool (32) is operated and the neutral position where the forward/reverse switching tool (32) is operated. By determining whether or not the old operation position that existed before passing through (N) is the same, the operation of the forward/reverse switching device (32) is changed to the clutch (
The detection switch (31a
) and (31b) and the information from the timer means (41), the forward/reverse switching device (32) is operated to the neutral position (N) and then to the forward position (F) or reverse position (R). By measuring the time that has elapsed until the clutch is operated, and comparing this measured time with a set time that has been entered in advance, it is determined whether the measured time is less than the set time. (FC) or (RC)
It is detected whether or not the forward/reverse switching tool (32) is operated for the purpose of turning on/back off before the set time elapses from the time of the switching operation.
そして、切り操作されたクラッチ（ＦＣ）または（ＲＣ
）を入りに戻すための前後進切換え具（３２）の操作が
切り操作時から前記設定時間を経過するまでにされたこ
とを入れ戻し操作検出手段（３８）が検出すると、この
入れ戻し操作検出手段（３８）からの情報に基いて自動
的に、油圧抜き手段（３７）が操作回路（２９）に操作
弁（２８）を中立位置（ｎ）に操作させるべき信号を、
かつ、操作回路（３６）に電磁比例減圧弁（３５）を非
作用位置に操作させるべき信号を夫々出力することによ
り、クラッチ（ＦＣ）または（ＲＣ）の入れ戻し用の前
後進切換え具（３２）の作動に優先して、操作弁（２８
）を中立位置（ｎ）に維持操作して先のクラッチ入り操
作時に油室（２６）または（２７）に供給されていた油
圧が抜は出るようにし、かつ、電磁比例減圧弁（３５）
を非作用位置に維持操作して後のクラッチ入り操作開始
に伴い電磁比例減圧弁（３５）が設定最低圧現出の初期
状態から作用し始めることを可能にするようにしである
。そして、入れ戻し操作検出手段（３８）からの情報に
基いて作動し始めてから前記設定時間と等しく設定時間
が経過すると、油圧抜き手段（３７）が前記時間経過を
タイマー手段（４１）からの情報に基いて検出すると共
に、操作回路（２９）及び（３６）に前後進切換え手段
（３０）からの信号に基いての作動をするよう信号を出
力し、前後進切換え手段（３０）のために自動的に操作
弁（２８）がクラッチ入り位ｉ１ｆ （ｆ）または（ｒ
）に切換え操作されると共に電磁比例減圧弁（３５）が
作動操作されてクラッチ（ＦＣ）または（ＲＣ）が設定
最高圧の入りに緩速で操作されることを可能にするよう
にしである。Then, the clutch (FC) or (RC
) When the reversing operation detecting means (38) detects that the forward/reverse switching device (32) for returning the switch to the on position has been operated before the set time elapses from the time of the switching operation, the reversing operation is detected. Based on the information from the means (38), the hydraulic pressure release means (37) automatically sends a signal to the operating circuit (29) to operate the operating valve (28) to the neutral position (n).
In addition, by outputting signals to the operation circuit (36) to operate the electromagnetic proportional pressure reducing valve (35) to the non-operating position, the forward/reverse switching device (32) for engaging/returning the clutch (FC) or (RC) is activated. ) has priority over the operation of the operation valve (28
) in the neutral position (n) so that the hydraulic pressure that was supplied to the oil chamber (26) or (27) during the previous clutch engagement operation is released, and the solenoid proportional pressure reducing valve (35)
This is to enable the electromagnetic proportional pressure reducing valve (35) to start operating from the initial state where the set minimum pressure appears when the clutch is engaged and the clutch is maintained in the non-operating position. Then, when a set time equal to the set time has elapsed since the start of operation based on the information from the reversing operation detection means (38), the hydraulic pressure release means (37) detects the elapsed time based on the information from the timer means (41). It outputs a signal to the operation circuits (29) and (36) to operate based on the signal from the forward/reverse switching means (30), and The operating valve (28) automatically moves to the clutch engagement position i1f (f) or (r
) and the electromagnetic proportional pressure reducing valve (35) is operated to enable the clutch (FC) or (RC) to be operated slowly to reach the set maximum pressure.
そして、前記伝動クラッチ（ＦＣ）及び後進伝動クラッ
チ（ＲＣ）が第３図に示す昇圧特性でもって入り操作さ
れることを可能にする状態に油室（２６）及び（２７）
を圧抜きするのに要する時間（ｔ２）を前記設定時間と
して設定しであるのである。Then, the oil chambers (26) and (27) are brought into a state that allows the transmission clutch (FC) and the reverse transmission clutch (RC) to be engaged and operated with the pressure increase characteristics shown in FIG.
The time (t2) required to release the pressure is set as the set time.
つまり、第４図に示すように、前後進切換え具（３２）
が前進位置（Ｆ） または後進位置（Ｆ）から中立位置
（Ｎ） に切換え操作され、この操作時から前記設定時
間（１）が経過するまでに、前後進切換え具（３２）が
先に在った前進位置（Ｆ）または後進位置（Ｒ）に戻し
操作されても、操作弁（２８）は直ちにクラッチ入り位
置（ｆ）または（ｒ）に切換えられず、前後進切換え具
（３２）の切り操作時から前記設定時間（１）を経過し
て始めてクラッチ入り位置（ｆ）または（ｒ） に切換
えられて、前進クラッチ（ＦＣ）または後進クラッチ（
ＲＣ）の入り操作が開始されるようにしである。In other words, as shown in Fig. 4, the forward/reverse switching tool (32)
is operated to switch from the forward position (F) or reverse position (F) to the neutral position (N), and by the time the set time (1) has elapsed from the time of this operation, the forward/reverse switching device (32) is located first. Even if the operation valve (28) is returned to the forward position (F) or reverse position (R), the operation valve (28) is not immediately switched to the clutch engaged position (f) or (r), and the forward/reverse switching device (32) Only after the set time (1) has elapsed from the time of the switching operation, the clutch is switched to the clutch engaged position (f) or (r), and the forward clutch (FC) or reverse clutch (
RC) entry operation is started.
前後進切換え具（３２）のクラッチ入り戻し操作がされ
てから設定時間（１）が経過した後の操作弁（２８）及
び電磁比例減圧弁（３５）のクラッチ入り位置や作動状
態への操作は、前後進切換え手段（３０）による自動操
作によってされるように構成する他に、前後進切換え具
（３２）の人為再操作によってされるように構成して実
施してもよい。After the set time (1) has elapsed since the forward/reverse switching device (32) was operated to engage/return the clutch, the operating valve (28) and the electromagnetic proportional pressure reducing valve (35) should not be operated to the clutch engaged position or operating state. In addition to being configured to be automatically operated by the forward/reverse switching means (30), it may also be configured and implemented by manual re-operation of the forward/reverse switching device (32).
前後進切換え装置の他、ギアミッションと複数の油圧操
作式クラッチとを組合わせ、これらクラッチを択一的に
入りにすることによって伝動されると共に入りにするク
ラッチを変更することによって変速段階が変更するよう
に構成した走行用変速装置にも本発明は適用できる。し
たがって、前進伝動クラッチ（ＦＣ）及び後進伝動クラ
ッチ（ＲＣ）を走行伝動用摩擦クラッチ（ＦＣ）。In addition to the forward/reverse switching device, a gear transmission and multiple hydraulically operated clutches are combined, and transmission is transmitted by selectively engaging these clutches, and the gear shift stage is changed by changing which clutch is engaged. The present invention can also be applied to a traveling transmission configured to do so. Therefore, the forward transmission clutch (FC) and the reverse transmission clutch (RC) are used as a friction clutch (FC) for driving transmission.
（ＲＣ）と称し、前後進切換え具（３２）を操作具（３
２）と称する。(RC), and the forward/reverse switching tool (32) is the operating tool (3
2).
電磁比例減圧弁（３５）に替え、油圧ピストン（２４）
及び（２５）をクラッチ入り側に操作する供給油圧を設
定するためのＩＪ ＩＪ−フ弁、このＩＪ ＩＪ−フ弁
のＩＪ ＩＪ−フ圧を時間経過に伴って増大調節する油
圧シリンダ、及びこの油圧シリンダと操作弁（２８）を
接続する可変絞り弁付きシリンダ操作油路の夫々から成
る昇圧手段を採用してもよい。したがって、これらを漸
次昇圧機構（３５）と総称する。Replace the electromagnetic proportional pressure reducing valve (35) with a hydraulic piston (24)
and (25) for setting the supply oil pressure to operate the clutch to the clutch engagement side, a hydraulic cylinder for increasing and adjusting the IJ pressure of this IJ IJ-f valve over time, and this Pressure increasing means may be employed, each consisting of a cylinder operating oil passage with a variable throttle valve that connects the hydraulic cylinder and the operating valve (28). Therefore, these are collectively referred to as a gradual pressure increase mechanism (35).
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。Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.
図面は本発明に係る作業車の走行用操作構造の実施例を
示し、第１図は伝動系統図、第２図は操作系のブロック
図、第３図は昇圧特性の説明図、第４図は前後進切換え
操作とクラッチ作動の関係を示す説明図である。
（２４）、 （２５）・・・・・・油圧ピストン、（２
８）・・・・・・操作弁、（３２）・・・・・・操作具
、（３５）・・・・・・漸次昇圧機構、（３７）・・・
・・・油圧抜き手段、（３８）・・・・・・入れ戻し操
作検出手段、（ＦＣ）、 （ＲＣ）・・・・・・走行伝
動用摩擦クラッチ。The drawings show an embodiment of the operating structure for driving a working vehicle according to the present invention, in which Fig. 1 is a transmission system diagram, Fig. 2 is a block diagram of the operating system, Fig. 3 is an explanatory diagram of boosting characteristics, and Fig. 4 FIG. 2 is an explanatory diagram showing the relationship between forward/reverse switching operation and clutch operation. (24), (25)...Hydraulic piston, (2
8)... Operating valve, (32)... Operating tool, (35)... Gradual pressure increase mechanism, (37)...
...Hydraulic pressure release means, (38)...Return operation detection means, (FC), (RC)...Friction clutch for traveling transmission.
Claims (1)
別に操作する複数の油圧ピストン（２４）、（２５）を
設けると共に、これら油圧ピストン（２４）、（２５）
を択一的にクラッチ入り側に操作する操作弁（２８）の
操作具（３２）を人為操作自在に設け、前記油圧ピスト
ン（２４）、（２５）をクラッチ入り側に操作するため
の油圧を設定最高圧に時間経過に伴って増大させる漸次
昇圧機構（３５）を受けた作業車の走行用操作構造であ
って、前記走行伝動用摩擦クラッチ（ＦＣ）、（ＲＣ）
のうち切り操作されたクラッチ（ＦＣまたはＲＣ）を入
りに戻すための操作具操作が切り操作時から設定時間経
過するまでにされたことを検出する入れ戻し操作検出手
段（３８）を設けると共に、この入れ戻し操作検出手段
（３８）が前記検出をすると自動的に入れ戻し用の操作
具作動に優先して前記操作弁（２８）を中立位置（ｎ）
に維持操作する油圧抜き手段（３７）を設けてある作業
車の走行用操作構造。A plurality of hydraulic pistons (24), (25) are provided to separately operate a plurality of friction clutches (FC), (RC) for driving transmission, and these hydraulic pistons (24), (25) are provided.
An operating tool (32) of the operating valve (28) for selectively operating the hydraulic pistons (24) and (25) toward the clutch engagement side is provided so as to be manually operable, and hydraulic pressure for operating the hydraulic pistons (24) and (25) toward the clutch engagement side is provided. This is an operation structure for traveling of a work vehicle which is provided with a gradual pressure increase mechanism (35) that increases the pressure to a set maximum pressure over time, wherein the traveling transmission friction clutch (FC), (RC)
In addition to providing a return operation detection means (38) for detecting that the operating tool operation for returning the disengaged clutch (FC or RC) to the engaged state is performed before a set time elapses from the time of the disengagement operation; When this insertion/return operation detection means (38) detects the above, it automatically moves the operation valve (28) to the neutral position (n) with priority over the operation of the operation tool for insertion/return.
An operation structure for driving a work vehicle, which is provided with a hydraulic pressure release means (37) for maintaining and operating the work vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63180610A JPH0231066A (en) | 1988-07-20 | 1988-07-20 | Control structure for running of working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63180610A JPH0231066A (en) | 1988-07-20 | 1988-07-20 | Control structure for running of working vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0231066A true JPH0231066A (en) | 1990-02-01 |
Family
ID=16086251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63180610A Pending JPH0231066A (en) | 1988-07-20 | 1988-07-20 | Control structure for running of working vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0231066A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04249620A (en) * | 1990-12-28 | 1992-09-04 | Ishikawajima Shibaura Mach Co Ltd | Speed change operation device for working vehicle |
| JP2002156035A (en) * | 2000-11-20 | 2002-05-31 | Yanmar Agricult Equip Co Ltd | Forward-backward movement switching device of working vehicle |
| WO2019044789A1 (en) * | 2017-09-01 | 2019-03-07 | ジヤトコ株式会社 | Abnormality diagnosing device and abnormality diagnosing method for selection solenoid valve of automatic transmission |
-
1988
- 1988-07-20 JP JP63180610A patent/JPH0231066A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04249620A (en) * | 1990-12-28 | 1992-09-04 | Ishikawajima Shibaura Mach Co Ltd | Speed change operation device for working vehicle |
| JP2002156035A (en) * | 2000-11-20 | 2002-05-31 | Yanmar Agricult Equip Co Ltd | Forward-backward movement switching device of working vehicle |
| JP4610071B2 (en) * | 2000-11-20 | 2011-01-12 | ヤンマー株式会社 | Forward / reverse switching device for work vehicle |
| WO2019044789A1 (en) * | 2017-09-01 | 2019-03-07 | ジヤトコ株式会社 | Abnormality diagnosing device and abnormality diagnosing method for selection solenoid valve of automatic transmission |
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