JPS60245857A - Retreat high-speed switching avoiding apparatus for shiftable agricultural machine - Google Patents
Retreat high-speed switching avoiding apparatus for shiftable agricultural machineInfo
- Publication number
- JPS60245857A JPS60245857A JP10006684A JP10006684A JPS60245857A JP S60245857 A JPS60245857 A JP S60245857A JP 10006684 A JP10006684 A JP 10006684A JP 10006684 A JP10006684 A JP 10006684A JP S60245857 A JPS60245857 A JP S60245857A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- retreat
- switching valve
- change
- oil
- 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
Landscapes
- Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、例えばトラクタの如き移動農機の後進高速
切替回避装置に関するもので、エンジン側に設けである
第１変速装置に、前後進切替のための油圧操作部を有し
ているものにおける後進操作の際に、第２変速装置の高
速切替を回避できるようにした装置を提案するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a device for avoiding high-speed reverse switching of a mobile agricultural machine such as a tractor. The present invention proposes a device that can avoid high-speed switching of the second transmission during reverse operation in a vehicle having a hydraulic operation section.
従来の技術
各種作業に便利なように、前進と後進の夫々を同一変速
段数に構成している上記の構成の場合、後進の際の高速
走行は、舵取操作がむつかしく危険であること等の理由
のために後進高速投入操作を規制したいと云う要望があ
るが、油圧操作タイプの変速装置においては好適なもの
が無い。Conventional Technology In the above configuration, in which forward and reverse gears are configured to have the same number of gears for convenience in various operations, high-speed driving when reversing is difficult and dangerous due to the steering operation. For some reason, there is a desire to restrict high-speed reverse input operations, but there is no suitable hydraulically operated type transmission.
発明が解決しようとする問題点 ′
夫々の変速切替弁の操作レバーや、操作ダイヤル等の操
作部材に、後進高速投入阻止のための牽制装置を設ける
ことも考えられるが、このためには特定の個所に大きい
設備空間を必要とする不利があるので、かかる機械的な
牽制装置を設けないで油圧回路構成によって後進高速切
替えを回避して、牽制のための設備空間を少くて済むよ
つＶＣしたものである。Problems to be Solved by the Invention ' It is conceivable to provide a check device for preventing high-speed reversing on the operation lever of each gear changeover valve, operation dial, etc., but for this purpose, a specific VC has the disadvantage of requiring a large amount of equipment space in some locations, so instead of installing such a mechanical check device, we used a hydraulic circuit configuration to avoid high-speed reverse switching, thereby reducing the amount of equipment space required for checking. It is something.
問題点を解決するための手段 上記問題点を解決するために次の技術的手段を講じた。Means to solve problems The following technical measures were taken to solve the above problems.
即ち、エンジン側に設けである第１変速装置（３）にお
ける前進と後進を切替えるべき第１油圧操作部（Ｑに圧
力油を給排制御する第１変速切替弁閉と、車輪側に設け
である第２変速装置（４）における高速と低速を切替え
るべき第２油圧操作部（Ｄｉに圧力油を給排制御する第
２変速切替弁（Ｓ）と、第２変速切替弁（８１の高速ボ
ート（Ｈ）から第２変速装置（４）の第２油圧操作部（
良の高速側操作部（Ｄ＋ ）に供給されている圧力油を
、第１変速切替弁（ト）の後進側えの切替操作に連動し
て上記高速ボート日からａ圧切１崗升第２変速装置（４
）の第２油圧操作部（口の低速側操作部（Ｄ２）へ切替
えできるようにした中間切替弁（転）とからなる移動農
機の後進高速切替回避装置である。That is, the first hydraulic operation part (Q) which controls the supply and discharge of pressure oil to the first hydraulic operating part (Q) that switches between forward and reverse in the first transmission (3) installed on the engine side, and the first hydraulic operation part (Q) which is provided on the wheel side. A second hydraulic operation part (a second gear changeover valve (S) that controls the supply and discharge of pressure oil to and from Di, which is to switch between high and low speeds in a certain second transmission (4), and a second gear changeover valve (S) that controls the supply and discharge of pressure oil to (H) to the second hydraulic operating section of the second transmission (4) (
The pressure oil supplied to the high-speed side operation part (D+) of the high-speed boat is connected to the switching operation of the reverse side of the first gear changeover valve (G), and from the above high-speed boat day, the pressure oil supplied to the high-speed side operation part (D+) is Device (4
This is a reverse high-speed switch avoidance device for a mobile agricultural machine, which is comprised of an intermediate switching valve (switch) that can switch to the second hydraulic operating section (low-speed operating section (D2) at the mouth).
実施例と作用 次にこの発明の一実施例を図に基づいて説明する。Examples and effects Next, one embodiment of the present invention will be described based on the drawings.
移動農機の走行変速装置の主要部分（例えば超低速変速
機構や動力取出機構を省略している）を第１図に示した
が、エンジン（１）の回転動力は、主クラッチ（２）を
介して前進と後進の切替えを行う第１変速装置（３）及
び、高速と低速の切替えを行う第２変速装置（４）に伝
達され、デフ機構（５）によって後車輪（６１６）を駆
動するものであり、第１変速装置（３）は、第１人力軸
（７）の動力を前進ギヤ列（８）を介して第１出力軸（
９）に伝えるか、又は、後進ギヤ列部を介して第１出力
軸（９）に伝えるために摩擦板式の油圧クラッチの如き
第１油圧操作部（Ｑを有しており、第１油圧操作部（Ｑ
は、第１変速切替弁閏によって上記択一の切替操作が行
われるものであり、第２変速装置（４）は第２人力軸（
１１）の動力を高速ギヤ列Ｑ２を介して第２出力軸θＪ
に伝えるか、又は、低速ギヤ列（１４を介して第２出力
軸（１代に伝えるために、摩擦板式の油圧クラッチの如
き第２油圧操作部（Ｄを有しており、第２油圧操作部（
Ｄは、第２変速切替弁（８１と中間切替弁（Ｍとによっ
て上記択一の切替操作が行われるものである。Figure 1 shows the main parts of the traveling transmission of a mobile agricultural machine (for example, the ultra-low speed transmission mechanism and power extraction mechanism are omitted). The transmission is transmitted to a first transmission device (3) that switches between forward and reverse motion, and a second transmission device (4) that switches between high speed and low speed, and drives the rear wheels (616) by a differential mechanism (5). The first transmission (3) transmits the power of the first human power shaft (7) to the first output shaft (
9) or to the first output shaft (9) via the reverse gear train. Part (Q
The above-described switching operation is performed by the first gear changeover valve lever, and the second gearshift device (4) is operated by the second human power shaft (
11) is transmitted to the second output shaft θJ via the high-speed gear train Q2.
or to the second output shaft (1) through the low-speed gear train (14), a second hydraulic operating section (D) such as a friction plate type hydraulic clutch is provided, and the second hydraulic operating section (D) Department (
D is the one in which the above-mentioned switching operation is performed by the second shift changeover valve (81) and the intermediate changeover valve (M).
即ち、第」図のように第１変速切替弁閑のスプールを前
進位置に操作したときは、油ポンプ（８の圧力油は、前
進ボート（Ｐ）から第１油圧操作部（Ｑの前進操作部（
Ｃ１）に供給されて前進ギヤ列（甲によって第］出力軸
（９）が駆動されることになり、第２変速切替弁（Ｓ）
のスプールを高速位置に操作したときは、油ポンプ（Ｂ
の圧力油は高速ボート０を経て中間切替弁（転）に到る
が、中間切替弁Ｍのスプールを、作動ボート（Ｊ）が油
ポンプ（Ｐｉからの油路にのぞむよう押圧するための押
動油路（−）は、タンク（′Ｄに開口しているため、ボ
ートはばね１１９によって押動されて非作動ボー） （
Ｉｌ＋が第２変速切替弁（Ｓ）の高速ボート（Ｈに連通
して圧力油は第２油圧操作部（Ｄ）の高速操作部（Ｄｌ
）に供給され、高速ギヤ列０りによって第２出力軸ａ階
が駆動されることになり、従って、前進高速状態となる
。That is, when the spool of the first gear changeover valve is operated to the forward position as shown in Figure 1, the pressure oil from the oil pump (8) is transferred from the forward boat (P) to the first hydraulic operating section (forward operation Q). Department (
C1) to drive the forward gear train (No. C1) output shaft (9), and the second gear changeover valve (S)
When the spool is operated to the high speed position, the oil pump (B
The pressure oil reaches the intermediate switching valve (transfer) via the high-speed boat 0, but the operating boat (J) pushes the spool of the intermediate switching valve M into the oil path from the oil pump (Pi). The hydraulic oil passage (-) is open to the tank ('D, so the boat is pushed by the spring 119 and becomes inactive) (
Il+ is connected to the high-speed boat (H) of the second gear changeover valve (S), and the pressure oil is connected to the high-speed operation section (Dl) of the second hydraulic operation section (D).
), and the second output shaft (a) is driven by the high-speed gear train 0, thus resulting in a forward high-speed state.
第１図の状態のとき、第２変速切替弁（Ｓ）を第２図の
ように低速位置に操作したときも、中間切替弁Ｎへの押
動油路（ｍ）は低速ボート（匂を介してタンク山に開口
しているので、中間切替弁開は非作動ボーＮｈｌが第２
変速切替弁（８１の低速ボート（Ｌｌに連通して、圧力
油は第２油圧操作部（Ｄ）の低速操作部（Ｄ２）ＩＣ供
給され、従って走行変速装置は前進低速状態となる。In the state shown in Figure 1, even when the second speed changeover valve (S) is operated to the low speed position as shown in Figure 2, the push oil passage (m) to the intermediate changeover valve N is Since the intermediate switching valve opens to the tank mountain through the
It communicates with the low speed boat (Ll) of the speed changeover valve (81), and pressure oil is supplied to the low speed operation section (D2) IC of the second hydraulic operation section (D), so that the traveling transmission is in the forward low speed state.
第１図に示すように第２変速切替弁（８１が高速位置に
あり、第１変速切替弁凹が前進位置にある状態で、この
第１変速切替弁（■を第３図のように後進位置に操作す
れば、第１変速切替弁（至）の後進ボート（刊が油ポン
プ（乃と押動油路（ｒｎ＋を連通ずるので、押動油路（
ｍ）の圧力油によって中間切替弁（Ｍのスプールかばね
（１５１に抗して押動されて同図のように、作動ボート
（１）が油ポンプ（Ｐｌからの油路に高速ポートｕを介
してのぞむことになり、この結果、圧力油は第２油圧操
作部（口の低速側操作部（Ｄ２）に供給されて走行変速
装置は後進低速状態となるものである。As shown in Figure 1, when the second gear changeover valve (81) is in the high speed position and the first gear changeover valve concave is in the forward position, the first gear changeover valve (■) is moved in reverse as shown in Figure 3. If you operate it to the position, the first gear changeover valve (to) will communicate with the oil pump (no) and the push oil path (rn+), so the push oil path (
As shown in the figure, the operating boat (1) is pushed by the pressure oil of the intermediate switching valve (M) against the spool (151) of the intermediate switching valve (M) through the high-speed port u to the oil path from the oil pump (Pl). As a result, the pressure oil is supplied to the second hydraulic operating section (low-speed operating section (D2)), and the travel transmission enters the low-speed reverse state.
発明の効果
この発明に係る移動農機の後進高速切替回避装置は上述
のように構成したものであって、第２変速切替弁（Ｓ）
が高速位置にあり、第１変速切替弁関が前進位置にある
前進高速の状態のとき、第１変速切替弁菌を後進位置に
切替操作すれば、中間切替弁Ｍの作用によって第２変速
装置（４）の第２油圧操作部（Ｄが低速側操作部（Ｄ２
）に切替えられることになり、このように、後進位置へ
の切替操作に連葡して走行変速装置が後進低速状態に切
替え操作されるため、特別な牽制装置を必要とせず、走
行変速装置が簡略化されたのである。Effects of the Invention The reverse high speed switching avoidance device for a mobile agricultural machine according to the present invention is constructed as described above, and includes a second speed changeover valve (S).
is in the high speed position and the first gear changeover valve is in the forward position, in a forward high speed state, if the first gear changeover valve is switched to the reverse position, the second gearshift is switched by the action of the intermediate changeover valve M. (4) The second hydraulic operating section (D is the low-speed operating section (D2)
), and in this way, the traveling transmission is switched to the reverse low speed state in conjunction with the switching operation to the reverse position, so there is no need for a special check device, and the traveling transmission is switched to the reverse low speed state. It has been simplified.
図はこの発明の一実施例を示し、第１図〜第３図は夫々
の操作状態における回路図である。
符号説明
（３）・・・第１変速装置 （４）・・・第２変速装置
（社）・・・高速ボー ト（Ｑ・・・第１油圧操作部（
均・・・第２油圧操作部 （Ｄ＋ ）・・・高速側操作
部（Ｄ２）・・・低速側操作部 閉・・・第１変速切替
弁（８１・・・縞２変速切替弁 （ｌＶｊ・・・中間切
替弁特許 出 願人 井関農機株式会社The figure shows one embodiment of the present invention, and FIGS. 1 to 3 are circuit diagrams in respective operating states. Explanation of symbols (3)...First transmission (4)...Second transmission (company)...High speed boat (Q...First hydraulic operation section (
Equal...Second hydraulic operation part (D+)...High speed side operation part (D2)...Low speed side operation part Closed...First speed changeover valve (81...Striped two speed changeover valve (lVj) ...Intermediate switching valve patent Applicant: Iseki Agricultural Machinery Co., Ltd.
Claims (1)
進を切替えるべき第１油圧操作部に圧力油を給排制御す
る第１変速切替弁と、車輪側に設けである第２変速装置
における高速と低速を切替えるべき第２油圧操作部に圧
力油を給排制御する第２変速切替弁と、第２変速切替弁
の高速ポートから第２変速装置の第２油圧操作部の高速
側操作部に供給されている圧力油を、第１変速切替弁の
後進側えの切替操作に連動して上記高速ポートから◎ｔ
カ１瞠；第２変速装置の第２油圧操作部の低速側操作部
へ切替えできるようにした中間切替弁とからなる移動農
機の後進高速切替回避装置。A first transmission switching valve that controls the supply and discharge of pressure oil to a first hydraulic operating section that switches between forward and reverse in a first transmission installed on the engine side; A second gear changeover valve that controls the supply and discharge of pressure oil to a second hydraulic operation unit that is to switch low speed, and a high speed port of the second gear changeover valve that supplies pressure oil to the high speed side operation unit of the second hydraulic operation unit of the second transmission. ◎T
F1: A reverse high speed switch avoidance device for a mobile agricultural machine, which comprises an intermediate switching valve that allows switching to the low speed side operating section of the second hydraulic operating section of the second transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10006684A JPS60245857A (en) | 1984-05-18 | 1984-05-18 | Retreat high-speed switching avoiding apparatus for shiftable agricultural machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10006684A JPS60245857A (en) | 1984-05-18 | 1984-05-18 | Retreat high-speed switching avoiding apparatus for shiftable agricultural machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60245857A true JPS60245857A (en) | 1985-12-05 |
Family
ID=14264090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10006684A Pending JPS60245857A (en) | 1984-05-18 | 1984-05-18 | Retreat high-speed switching avoiding apparatus for shiftable agricultural machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60245857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017450A (en) * | 2021-10-29 | 2022-02-08 | 中国第一汽车股份有限公司 | Hydraulic control device of automatic transmission |
-
1984
- 1984-05-18 JP JP10006684A patent/JPS60245857A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017450A (en) * | 2021-10-29 | 2022-02-08 | 中国第一汽车股份有限公司 | Hydraulic control device of automatic transmission |
| CN114017450B (en) * | 2021-10-29 | 2023-09-12 | 中国第一汽车股份有限公司 | Hydraulic control device of automatic transmission |
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