JPH094704A - Auxiliary speed change operation device for tractor - Google Patents

Auxiliary speed change operation device for tractor

Info

Publication number
JPH094704A
JPH094704A JP7151371A JP15137195A JPH094704A JP H094704 A JPH094704 A JP H094704A JP 7151371 A JP7151371 A JP 7151371A JP 15137195 A JP15137195 A JP 15137195A JP H094704 A JPH094704 A JP H094704A
Authority
JP
Japan
Prior art keywords
transmission
main
clutch
neutral position
gears
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
JP7151371A
Other languages
Japanese (ja)
Other versions
JP3658799B2 (en
Inventor
Yoshitaka Tani
良孝 谷
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.)
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
Original Assignee
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
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 Iseki and Co Ltd, Iseki Agricultural Machinery Mfg Co Ltd filed Critical Iseki and Co Ltd
Priority to JP15137195A priority Critical patent/JP3658799B2/en
Publication of JPH094704A publication Critical patent/JPH094704A/en
Application granted granted Critical
Publication of JP3658799B2 publication Critical patent/JP3658799B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Control Of Transmission Device (AREA)

Abstract

PURPOSE: To disengage gears smoothly by providing a relay circuit which sets main speed change gears to a neutral position by the operation of a main clutch in a tractor which is provided with an auxiliary speed change gear device capable of changing speed ranging from ultra low speed to high speed and in which a main transmission operated electronicaly is provided. CONSTITUTION: When a main clutch 4 is disengaged with an auxiliary transmission 2 set at ultra low speed position LL, the main speed change gears G1 to G4 of a main transmission 3 are moved to a neutral position by a neutral position relay circuit and rotated freely. By this, because any interconnecting load from the other gears does not act on the main speed change gears G1 to G4 even if the auxiliary speed change gears G11 to G14 are intermeshed, the auxiliary speed change gears G1 and G2 in the ultra low speed position LL is disengaged smoothly to the neutral position for increased controllability. In addition, this construction can be simplified because a neutral position relay circuit is assembled into the electronic control circuit part of the main transmission 3.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、トラクタの走行伝動
における副変速装置を操作する副変速操作装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary transmission operating device for operating an auxiliary transmission in traveling transmission of a tractor.

【0002】[0002]

【従来の技術、および発明が解決しようとする課題】ト
ラクタの走行伝動にあっては、副変速装置のうちでも特
に超低速位置(クリープ)にあっては、ギヤの操作荷重
が大きく、操作が行い難く、一旦この超低速位置に入れ
ると、この超低速位置からのギヤの抜きが円滑に行われ
難い。
2. Description of the Related Art In traveling transmission of a tractor, particularly in an ultra-low speed position (creep) of the auxiliary transmission, the operation load of the gear is large and the operation is difficult. It is difficult to perform, and once the gear is put in this ultra-low speed position, it is difficult to smoothly remove the gear from this ultra-low speed position.

【0003】[0003]

【課題を解決するための手段】この発明は、副変速レバ
ー1の操作により超低速位置LLを含む、低速位置L、
中速位置M、及び変速位置H等の変速を行いうる副変速
ギヤG11〜G14を有した副変速装置2と、この副変
速装置2の変速位置にもとづいて主変速が電子的に行わ
れる主変速ギヤG1〜G4を有した主変速装置3とを設
けたトラクタにおいて、主クラッチ4の切り操作により
各主変速ギヤG1〜G4を中立位置へ作動させる中立位
置リレー回路5を設けてなる副変速操作装置の構成とす
る。
According to the present invention, a low speed position L, including an ultra low speed position LL, is operated by operating an auxiliary transmission lever 1.
The auxiliary transmission device 2 having the auxiliary transmission gears G11 to G14 capable of changing gears such as the middle speed position M and the shift position H, and the main transmission electronically based on the shift position of the auxiliary transmission device 2. In a tractor provided with a main transmission device 3 having transmission gears G1 to G4, a sub-transmission provided with a neutral position relay circuit 5 for operating each of the main transmission gears G1 to G4 to a neutral position by disengaging the main clutch 4. The configuration of the operating device.

【0004】[0004]

【作用、及び発明の効果】エンジンによる走行車輪の伝
動は、主クラッチ4、主変速装置3、及び副変速装置2
等を経て行われる。副変速装置2は、副変速レバー1の
操作によって副変速ギヤG11〜G14の選択によっ
て、超低速位置LLから低速位置L、中速位置M、又は
高速位置H等の各副変速伝動を行わせることができる。
主変速装置3は、これらの副変速ギヤG11〜G14の
選択にもとづいて、操縦の設定走行速のもとにコントロ
ーラからの電子的出力により主変速ギヤG1〜G4が選
択されて、設定走行速に合った走行伝動が行われる。
The transmission of the traveling wheels by the engine is performed by the main clutch 4, the main transmission 3, and the sub transmission 2.
And so on. The subtransmission device 2 causes the subtransmission gears G11 to G14 to be selected by operating the subtransmission lever 1 to perform each subtransmission transmission from the ultralow speed position LL to the low speed position L, the medium speed position M, or the high speed position H. be able to.
Based on the selection of these sub transmission gears G11 to G14, the main transmission 3 selects the main transmission gears G1 to G4 by the electronic output from the controller based on the set traveling speed of the steering, and sets the set traveling speed. The drive transmission is performed according to.

【0005】前記副変速装置2が超低速位置LLにある
とき、主クラッチ4を切りにすると、中立位置リレー回
路5によって、主変速装置3における各主変速ギヤG1
〜G4を中立位置にして回転自在の状態とする。これに
よって、主変速ギヤG1〜G4には副変速ギヤG11〜
G14が噛合連動状態にあっても、他のギヤ等の連動負
荷は働かないために、超低速位置LLにおける副変速ギ
ヤG1,G2の中立位置への抜きを円滑に行わせ、操作
性を高めることができる。しかも、この構成は、前記主
変速装置3の電子操作回路部に中立位置リレー回路5を
組込む構成であるから簡単化することができる。
When the main clutch 4 is disengaged when the sub transmission 2 is in the ultra-low speed position LL, the neutral position relay circuit 5 causes the main transmission gears G1 in the main transmission 3 to operate.
~ G4 is set to the neutral position so that it is rotatable. As a result, the main transmission gears G1 to G4 have the auxiliary transmission gears G11 to G4.
Even if G14 is in the meshing interlocking state, the interlocking loads of other gears and the like do not work. Therefore, the auxiliary transmission gears G1 and G2 at the ultra-low speed position LL are smoothly disengaged to the neutral position, and operability is improved. be able to. Moreover, this configuration can be simplified because the neutral position relay circuit 5 is incorporated in the electronic operation circuit portion of the main transmission 3.

【0006】[0006]

【実施例】トラクタ車体は、前部のエンジンEからクラ
ッチハウジング6やミッションケース7等を一体的に連
結して、エンジンE前部には、フロントアクスルブラケ
ット8によってフロントアクスルハウジングを支持し、
このフロントアクスルハウジングの左右両側部にステア
リングハンドル9により操向自在の前車輪10を軸装1
1し、ミッションケース7の後部には、左右両側方にリ
ヤアクスルハウジングを設けて後車輪12を軸装13し
ている。14フェンダー、15は操縦席、16はリフト
アームで、車体後部に連結の作業機を昇降すべく三点リ
ンク機構等に連結する。
[Example] In a tractor vehicle body, a clutch housing 6, a transmission case 7 and the like are integrally connected from a front engine E, and a front axle housing 8 is supported by a front axle bracket 8 in the front portion of the engine E.
Front wheels 10 which can be steered by a steering handle 9 are mounted on both left and right sides of the front axle housing.
In the rear part of the transmission case 7, rear axle housings are provided on both left and right sides, and a rear wheel 12 is mounted on the shaft 13. Reference numeral 14 is a fender, 15 is a cockpit, and 16 is a lift arm, which is connected to a three-point link mechanism or the like to lift and lower a working machine connected to the rear part of the vehicle body.

【0007】このトラクタは、エンジンEの駆動によ
り、前車輪10と後車輪12とを伝動して走行する四輪
駆動走行形態とし、ミッションケース7の後端には作業
機を連動するPTO軸17を有する。前記主クラッチ4
は、クラッチペタル18の踏込によって切ることができ
る湿式単板形態、又は湿式多板形態とし、又、このクラ
ッチぺタル18の踏込を検出するクラッチスイッチ19
乃至センサが設けられている。
This tractor has a four-wheel drive mode in which the front wheels 10 and the rear wheels 12 are transmitted by the drive of the engine E, and a PTO shaft 17 for interlocking a working machine is provided at the rear end of the transmission case 7. Have. The main clutch 4
Is a wet single-plate type or a wet multi-plate type that can be disengaged by stepping on the clutch petal 18, and a clutch switch 19 for detecting the stepping on of the clutch petal 18.
A sensor is provided.

【0008】この主クラッチ4を経て駆動されるリバー
サクラッチ20は、湿式多板形態として、該主クラッチ
4から回転されるクラッチ軸21から正転ギヤ22と逆
転ギヤ23を介して連動される前進クラッチギヤG21
と後進クラッチギヤG22を有し、油圧によるクラッチ
24をリバーサ軸25上において、中立位置Nから前進
クラッチギヤG21に接続することにより前進位置Fの
連動を行わせ、後進クラッチギヤG22に接続すること
によって後進位置Rの連動を行わせる。
The reverser clutch 20 driven through the main clutch 4 is a wet multi-plate type, and the forward movement is linked from a clutch shaft 21 rotated from the main clutch 4 via a forward rotation gear 22 and a reverse rotation gear 23. Clutch gear G21
And a reverse clutch gear G22, and a hydraulic clutch 24 is connected on the reverser shaft 25 from the neutral position N to the forward clutch gear G21 so that the forward position F is interlocked and connected to the reverse clutch gear G22. The reverse position R is interlocked with.

【0009】前記リバーサクラッチ20のリバーサ軸2
5から連動される主変速装置3は、各カウンタギヤ26
を有するカウンタ軸27と、各カウンタギヤ26に噛合
主変速ギヤG1〜G4とクラッチ28,29を有した変
速軸30とを平行に設け、クラッチ28を中立位置から
主変速ギヤG1噛合させて第一速とし、ギヤG2に噛合
させて第二速とし、又、クラッチ29を中立位置から主
変速ギヤG3に噛合させて第三速とし、ギヤG4に噛合
させて第四速とすることができる。
The reverser shaft 2 of the reverser clutch 20.
The main transmission 3 that is interlocked with the
Is provided in parallel with the main transmission gears G1 to G4 meshing with each counter gear 26 and the transmission shaft 30 having clutches 28 and 29, and the clutch 28 is engaged from the neutral position to the main transmission gear G1. It is possible to set the first speed to the second speed by engaging the gear G2, the clutch 29 from the neutral position to the main transmission gear G3 to the third speed, and the gear G4 to the fourth speed. .

【0010】これら各クラッチ28,29のシフタアク
チュエータ31,32は電磁ソレノイドや電磁ソレノイ
ドバルブ等からなり、マイコンを有するコントローラC
PUからの出力によって電子的に切替制御される構成で
ある。前記変速軸30の後方に副変速軸33,34を平
行に設け、これら副変速軸33上には副変速ギヤG2,
G4とこれらの間に切替えるクラッチ35とを設け、副
変速軸34上には副変速ギヤG1,G3とこれらの間に
切替えるクラッチ35とを設ける。これらの副変速クラ
ッチ35,36を副変速レバー1の操作で切替すること
によって、副変速の高速位置Hは、クラッチ36を中立
位置から副変速ギヤG4側に噛合させて、前記変速軸3
0から副変速軸33、ギヤ37等を経て副変速軸34へ
連動され、ピニオンギヤ38へ至る伝動系路となる。
又、中速位置Mは、クラッチ35を中立位置から副変速
ギヤG3側へ噛合させることにより、変速軸30からギ
ヤ39を経て、この副変速ギヤG3及びクラッチ35か
ら副変速軸34へ至る伝動系路となる。
The shifter actuators 31, 32 of the clutches 28, 29 are electromagnetic solenoids, electromagnetic solenoid valves, etc., and have a controller C having a microcomputer.
This is a configuration in which switching control is electronically controlled by the output from the PU. Sub-transmission shafts 33, 34 are provided in parallel behind the transmission shaft 30, and sub-transmission gears G2, G2 are provided on the sub-transmission shaft 33.
G4 and a clutch 35 for switching between them are provided, and sub-transmission gears G1, G3 and a clutch 35 for switching between them are provided on the sub-transmission shaft 34. By switching these auxiliary transmission clutches 35 and 36 by operating the auxiliary transmission lever 1, the high speed position H of the auxiliary transmission causes the clutch 36 to mesh from the neutral position to the auxiliary transmission gear G4 side, and the transmission shaft 3
The transmission path is linked to the sub transmission shaft 34 from 0 through the sub transmission shaft 33, the gear 37, etc., and reaches the pinion gear 38.
Further, the middle speed position M is transmitted from the auxiliary transmission gear G3 and the clutch 35 to the auxiliary transmission shaft 34 via the transmission shaft 30 through the gear 39 by engaging the clutch 35 from the neutral position to the auxiliary transmission gear G3 side. It becomes a route.

【0011】又、副変速の低速位置Lは、前記クラッチ
36を副変速ギヤG2側へ噛合させることによって、変
速軸30からギヤ39、G2、クラッチ36、変速軸3
3、ギヤ37等を経て変速軸34へ伝動される。又、超
低速位置LLは、クラッチ35をギヤG1側へ噛合する
ことによって、変速軸30からギヤ39、ギヤG2,G
1、及びクラッチ35等を経て変速軸34へ伝動され
る。
Further, at the low speed position L of the auxiliary gear shift, the clutch 36 is engaged with the auxiliary gear G2 side so that the gears 39, G2, the clutch 36, and the gear shaft 3 are shifted from the gear shift shaft 30.
It is transmitted to the speed change shaft 34 via the gear 3, the gear 37 and the like. Further, at the ultra-low speed position LL, by engaging the clutch 35 with the gear G1 side, the transmission shaft 30 is shifted to the gear 39, the gears G2 and G2.
1 and the clutch 35 etc., and is transmitted to the speed-change shaft 34.

【0012】40はリヤデフ装置で、前記ピニオンギヤ
38からの伝動を受けて左右の車軸13へ差動伝動す
る。41,42は通常の四WD伝動と、前車輪10を後
車輪12の二倍の速度に伝動する倍速四WD伝動とに切
替可能のクラッチである。43は前車輪10の車軸11
にフロントデフ装置を介して伝動する前輪伝動軸であ
る。
Reference numeral 40 is a rear differential device which receives differential transmission from the pinion gear 38 to the left and right axles 13. Reference numerals 41 and 42 denote clutches that can be switched between normal four-wheel drive transmission and double-speed four-wheel drive transmission that transmits the front wheels 10 to twice the speed of the rear wheels 12. 43 is the axle 11 of the front wheel 10.
Is a front wheel transmission shaft that is transmitted through a front differential device.

【0013】前記コントローラCPUには、主クラッチ
ペタル18の踏込みを検出するスイッチ19が入力さ
れ、出力側にはリバーサクラッチ24を入り切りするア
クチュエータ44、主変速装置3のクラッチ28,29
を入り切りするアクチュエータ31,32等をソレノイ
ド45F,45R,46〜49出力すべく設ける。又、
副変速レバー1による変速位置スイッチ50〜53が設
けられ、このうち超低速位置スイッチ50の入力回路に
は、前記主クラッチペタル18の踏込によるクラッチス
イッチ19のONによって作動するリレースイッチR2
が設けられ、このリレースイッチR2のON、及び超低
速位置スイッチ50のONによって、各ソレノイド46
〜49の出力がOFFされて、主変速位置にあるクラッ
チ28,29は中立位置Nに作動する構成となってい
る。
A switch 19 for detecting the depression of the main clutch petal 18 is input to the controller CPU, an actuator 44 for inputting / disconnecting the reverser clutch 24 on the output side, and clutches 28, 29 of the main transmission 3.
Actuators 31, 32 for turning on and off are provided to output solenoids 45F, 45R, 46 to 49. or,
The shift position switches 50 to 53 for the auxiliary shift lever 1 are provided. Of these, the input circuit of the ultra-low speed position switch 50 is a relay switch R2 that operates when the clutch switch 19 is turned on when the main clutch petal 18 is stepped on.
Is provided, and each solenoid 46 is turned on by turning on the relay switch R2 and the ultra-low speed position switch 50.
The output of ~ 49 is turned off, and the clutches 28, 29 in the main shift position are operated in the neutral position N.

【0014】又、リレースイッチR1は、リバーサソレ
ノイド45F(前進),45R(後進)の回路に設けら
れて、主クラッチ4の切りによってリバーサクラッチ2
4を中立位置にするものである。トラクタの作業走行に
おいて、予め作業に適応した走行速度を設定しておけ
ば、副変速レバー1を手動操作して適切な変速位置L
L,L,M,Hの選択操作で、主変速装置3ではコント
ローラCPUからの出力で一速〜四速が自動的に変速さ
れる。このとき副変速レバー1を変速操作するとき、主
クラッチペタル18の踏込みによって主クラッチ4が切
りになると共に、クラッチスイッチ19がONになり、
リレースイッチR1のOFFによって、前進リバーサソ
レノイド45F、及び後進リバーサソレノイド45Rに
より、リバーサクラッチ24は中立位置となり、リバー
サ軸25の連動負荷を小さくして、該副変速装置2や主
変速装置3等の入り、切り変速を円滑に行わせる。
Further, the relay switch R1 is provided in the circuit of the reverser solenoids 45F (forward) and 45R (reverse), and when the main clutch 4 is disengaged, the reverser clutch 2 is released.
4 is the neutral position. In the work traveling of the tractor, if the traveling speed adapted to the work is set in advance, the sub-shift lever 1 is manually operated and the appropriate shift position L is set.
By selecting L, L, M, and H, the main transmission 3 automatically shifts from the first speed to the fourth speed by the output from the controller CPU. At this time, when the sub-shift lever 1 is operated to shift, the main clutch 4 is disengaged by depressing the main clutch petal 18, and the clutch switch 19 is turned on.
When the relay switch R1 is turned off, the forward reverser solenoid 45F and the reverse reverser solenoid 45R bring the reverser clutch 24 to the neutral position, reducing the interlocking load of the reverser shaft 25 and reducing the auxiliary transmission 2 and the main transmission 3. Turns on and off for smooth shifting.

【0015】このとき、前記超低速位置LLにおける副
変速操作では、該主クラッチ4切りによって、リレース
イッチR1と共に、リレースイッチR2のOFFにより
コントローラCPUからの主変速装置3の各ソレノイド
46〜49が通電されず主変速クラッチ28,29は中
立位置Nとなり、従って、変速軸30の連動負荷を小さ
くして、副変速ギヤG11からの副変速クラッチ35の
離脱が円滑に行われ、超低速位置LLにおける副変速レ
バー1の中立位置Nへの復帰操作を容易に行わせること
ができる。
At this time, in the auxiliary shift operation at the ultra-low speed position LL, the main clutch 4 is disengaged to turn off the relay switch R1 and the relay switch R2 to turn off the solenoids 46 to 49 of the main transmission 3 from the controller CPU. The main shift clutches 28 and 29 are not energized and are in the neutral position N. Therefore, the interlocking load of the shift shaft 30 is reduced, and the sub shift clutch 35 is smoothly disengaged from the sub shift gear G11. It is possible to easily perform the operation of returning the auxiliary shift lever 1 to the neutral position N in.

【0016】図4のおいて、上例と異なる点は、前記主
変速装置3の変速ソレノイド46〜49による変速クラ
ッチ28,29がいずれかの主変速ギヤG1〜G4に入
ったことを検出するスイッチ乃至センサー54,55,
56,57を設け、前記超低速位置LLを検出するスイ
ッチ50がONし、更に、主変速装置3が一速位置又は
二速位置に変速されてこれらのセンサー54又は55が
検出したときだけ、前記主クラッチペタル18を踏むこ
とによりクラッチスイッチ19がONすると、主変速ソ
レノイド46,47の出力信号を停止して主変速クラッ
チ28を中立位置として、上例と同様に超低速位置LL
における副変速レバー1の抜けを行い易くしたものであ
る。
In FIG. 4, the difference from the above example is that the shift clutches 28, 29 by the shift solenoids 46-49 of the main transmission 3 are detected to have entered any of the main shift gears G1-G4. Switches or sensors 54, 55,
56 and 57 are provided, the switch 50 for detecting the ultra-low speed position LL is turned ON, and further, when the main transmission 3 is shifted to the first speed position or the second speed position and these sensors 54 or 55 detect, When the clutch switch 19 is turned on by stepping on the main clutch petal 18, the output signals of the main transmission solenoids 46 and 47 are stopped and the main transmission clutch 28 is set to the neutral position, and the super low speed position LL is set as in the above example.
The auxiliary shift lever 1 can be easily pulled out.

【0017】図5,図1において、デフロックペタル5
8によるデフロックを行った後ち、このデフロックペタ
ル58を解除してもデフロック爪60が切りにならない
とき、操向ブレーキ59を自動的に作動させることによ
り、デフロックを解除させるようにしたものである。ス
テアリングハンドル9を操向することにより、自動的
に、リフトアーム16を上昇させて作業機を非作業位置
へ上昇させると共に、操向ブレーキ59を効かせるオー
トリフトブレーキ制御を有するトラクタにあって、後車
輪12連動のリヤデフ装置40部に設けられるデフロッ
ク爪60を、直進走行時に効かせて左右の後車輪12を
一体的に回転させる形態にあっては、デフロックペタル
58を操縦者が踏んでデフロックを行ったのち、操向旋
回等のためにこのデフロックペタル58から足を離して
も、デフロック爪60がスラスト荷重を受ける等のため
に抜け戻らないことがあり、デフロックが解除されない
ことがある。
5 and 1, the diff lock petal 5
After the diff lock by 8 is performed, when the diff lock claw 60 is not cut even if the diff lock petal 58 is released, the steering brake 59 is automatically actuated to release the diff lock. . By steering the steering handle 9 to automatically raise the lift arm 16 to raise the working machine to the non-working position, and in the tractor having the automatic lift brake control that activates the steering brake 59, In a mode in which the diff lock claw 60 provided in the rear diff device 40 section interlocking with the rear wheel 12 is made effective during straight traveling to integrally rotate the left and right rear wheels 12, the operator steps on the diff lock petal 58 to perform the diff lock. Even if the diff lock petal 58 is released for steering turning after the operation, the diff lock claw 60 may not come back due to the thrust load, and the diff lock may not be released.

【0018】このようなとき、デフロックペタル58の
踏込が解除されたことを検出するペタルセンサ61と、
デフロック爪60のデフロック位置を検出するデフロッ
クセンサ62とによって、これらの検出時には、前記操
向ブレーキ59のブレーキをT秒時間間隔で断続して自
動的に働かせるようにしたものである。これによってデ
フロック爪60がデフロック解除に戻り易いものであ
る。なお、このとき左右の操向ブレーキ59を交互に効
かせるように出力制御することにより、より早くデフロ
ック解除できる。又、操向ブレーキ59を軽く効かせて
もデフロックが解除されないときは、ブザー又はランプ
で自動警報して、走行変速を低速域に自動減速させた
り、又走行を自動停止させるもよい。
At such a time, a petal sensor 61 for detecting that the diff-lock petal 58 is released from the depression,
A diff lock sensor 62 for detecting the diff lock position of the diff lock claw 60 is used to automatically operate the brake of the steering brake 59 intermittently at T second time intervals when these are detected. This allows the diff lock claw 60 to easily return to the diff lock release state. At this time, the diff lock can be released more quickly by controlling the output so that the left and right steering brakes 59 are alternately activated. When the diff lock is not released even if the steering brake 59 is lightly applied, a buzzer or a lamp may be automatically warned to automatically reduce the traveling speed to a low speed range, or the traveling may be stopped automatically.

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

【図1】リレー回路図。FIG. 1 is a relay circuit diagram.

【図2】伝動機構図。FIG. 2 is a transmission mechanism diagram.

【図3】トラクタ側面図。FIG. 3 is a side view of the tractor.

【図4】一部別実施例を示す制御回路図、及びそのフロ
ーチャート。
FIG. 4 is a control circuit diagram showing a part of another embodiment, and a flowchart thereof.

【図5】デフロック解除制御のフローチャート。FIG. 5 is a flowchart of differential lock release control.

【符号の説明】[Explanation of symbols]

1 副変速レバー 2 副変速装置 3 主変速装置 4 主クラッチ 5 中立位置リレー回路 LL 超低速位置 L 低速位置 M 中速位置 H 高速位置 G1〜G4 主変速ギヤ G11〜G14 副変速ギヤ 1 Auxiliary transmission lever 2 Auxiliary transmission device 3 Main transmission device 4 Main clutch 5 Neutral position relay circuit LL Super low speed position L Low speed position M Medium speed position H High speed position G1 to G4 Main transmission gear G11 to G14 Sub transmission gear

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 副変速レバー1の操作により超低速位置
LLを含む、低速位置L、中速位置M、及び変速位置H
等の変速を行いうる副変速ギヤG11〜G14を有した
副変速装置2と、この副変速装置2の変速位置にもとづ
いて主変速が電子的に行われる主変速ギヤG1〜G4を
有した主変速装置3とを設けたトラクタにおいて、主ク
ラッチ4の切り操作により各主変速ギヤG1〜G4を中
立位置へ作動させる中立位置リレー回路5を設けてなる
副変速操作装置。
1. A low-speed position L, a medium-speed position M, and a shift position H including an ultra-low-speed position LL when the sub-shift lever 1 is operated.
And the like, and the main transmission gears G1 to G4 in which the main transmission is electronically performed based on the shift position of the sub transmission device 2. A sub-transmission operation device comprising a neutral position relay circuit 5 for actuating each main transmission gear G1 to G4 to a neutral position by disengaging a main clutch 4 in a tractor provided with a transmission device 3.
JP15137195A 1995-06-19 1995-06-19 Sub-transmission operation device for tractor Expired - Fee Related JP3658799B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15137195A JP3658799B2 (en) 1995-06-19 1995-06-19 Sub-transmission operation device for tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15137195A JP3658799B2 (en) 1995-06-19 1995-06-19 Sub-transmission operation device for tractor

Publications (2)

Publication Number Publication Date
JPH094704A true JPH094704A (en) 1997-01-07
JP3658799B2 JP3658799B2 (en) 2005-06-08

Family

ID=15517102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15137195A Expired - Fee Related JP3658799B2 (en) 1995-06-19 1995-06-19 Sub-transmission operation device for tractor

Country Status (1)

Country Link
JP (1) JP3658799B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000337504A (en) * 1999-05-24 2000-12-05 Iseki & Co Ltd Shift control device for working vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000337504A (en) * 1999-05-24 2000-12-05 Iseki & Co Ltd Shift control device for working vehicle

Also Published As

Publication number Publication date
JP3658799B2 (en) 2005-06-08

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