JP2004217168A - Transmission of tractor - Google Patents

Transmission of tractor Download PDF

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Publication number
JP2004217168A
JP2004217168A JP2003009895A JP2003009895A JP2004217168A JP 2004217168 A JP2004217168 A JP 2004217168A JP 2003009895 A JP2003009895 A JP 2003009895A JP 2003009895 A JP2003009895 A JP 2003009895A JP 2004217168 A JP2004217168 A JP 2004217168A
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JP
Japan
Prior art keywords
shaft
clutch
transmission
gear
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.)
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Application number
JP2003009895A
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Japanese (ja)
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JP4292339B2 (en
Inventor
Noboru Sagawa
昇 佐川
Tatsuzo Murakami
達三 村上
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
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Application filed by Iseki and Co Ltd, Iseki Agricultural Machinery Mfg Co Ltd filed Critical Iseki and Co Ltd
Priority to JP2003009895A priority Critical patent/JP4292339B2/en
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  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems wherein a reverser clutch, an independent PTO clutch or the like employs a multi-disk clutch by a hydraulic pressure operation, hence the constitution of a transmission is complicated, assembling and disassembling are complicated and the constitution of a hydraulic operation system is dispersed longitudinally and complicated, especially when these clutches are mixed among a main shift gear, a sub shift gear, a PTO shift gear and the like. <P>SOLUTION: The outer periphery of an inner shaft 2 directly interlocking with an engine shaft 1 is provided with an outer shaft 4 interlocked and rotated via a main clutch 3. The reverser clutches 5 and 6, gears 7 and 8 and the PTO clutch 9 are vertically in the rear side sections of the rear ends of the inner shaft 2 and the outer shaft 4. A reverser clutch input shaft 10 is interlocked from the rear end of the outer shaft 4 via the gears 11 and 12, and a PTO clutch input shaft 13 is interlocked from the rear end of the inner shaft 2 via the gears 14 and 15. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、トラクタの伝動装置に関し、前側にエンジン軸から後側のミッションケースの変速装置やPTO軸等を連動する伝動機構を内装のクラッチハウジングや伝動ケースを有する形態のトラクタに利用しうる。
【0002】
【従来の技術】
メインクラッチ及びリバーサクラッチは前部のクラッチハウジング部に設けられるが、PTOクラッチは後部のミッションケース部の設けられる。
【0003】
【発明が解決しようとする課題】
リバサークラッチや、インディペンデントPTOクラッチ等は、油圧力操作による多盤形態のクラッチを用いるため、伝動機構の構成が煩雑である。とくに、これらのクラッチが主変速ギヤや、副変速ギヤ、PTO変速ギヤ等の間に混在されると、組立て、分解が複雑化されることはもとより、油圧操作系の構成も前後に分散されて複雑となる。この発明は、これら各クラッチをクラッチハウジング内に纏めて設け、主変速ギヤや、副変速ギヤ、PTO変速ギヤ等と離隔して配置し、クラッチハウジング内の構成を簡潔化するものである。
【0004】
【課題を解決するための手段】
請求項1に記載の発明は、エンジン軸1に直接連動の内軸2の外周にメインクラッチ3を介して連動回転される外軸4を設け、これら内軸2及び外軸4の後端後側部においてリバーサクラッチ5,6ギヤ7,8とPTOクラッチ9を上下に配置し、この外軸4後端からリバーサクラッチ入力軸10をギヤ11,12連動し、内軸2後端からPTOクラッチ入力軸13をギヤ14,15連動することを特徴とするトラクタの伝動装置の構成とする。エンジン軸1の回転によって内軸2が直接伝連動回転されて、PTOクラッチ入力軸13からPTOクラッチ9へ伝動される。このPTOクラッチ9の入りによって後部のPTO軸が伝動される。又、メインクラッチ3の入りによって外軸4を経てリバーサクラッチ入力軸10を伝動し、正転リバーサクラッチ5、又は逆転リバーサクラッチ6の入りによって後側の主変速ギヤ等を正回転、又は逆回転伝動する。これらリバーサクラッチ5,6ギヤ7,8とPTOクラッチ9は、内軸2及び外軸4の後端よりも後側部において略上下に配置され、これら内軸2とPTOクラッチ入力軸13との間を連動するギヤ14,15等や、外軸4とリバーサクラッチ入力軸10との間を連動するギヤ11,12等は、該リバーサクラッチ5,6及びPTOクラッチ9等の前側に沿って上下に配置される。
【0005】
請求項2に記載の発明は、エンジン軸1に調節連動の内軸2の外周にメインクラッチ3を介して連動回転される外軸4を設け、これら内軸2後端部と外軸4後端部との間においてリバーサクラッチ5,6ギヤ7,8とPTOクラッチ9を上下に配置し、この外軸4後端からリバーサクラッチ入力軸10をギヤ11,12連動し、内軸2後端からPTOクラッチ入力軸13をギヤ14,15連動することを特徴とするトラクタの伝動装置の構成とする。ここにおいて、前記請求項1に記載の発明と異なる点は、内軸2がリバーサクラッチ5,6ギヤ7,8やPTOクラッチ9よりも後方へ長く延長されて、これらの後側部にPTOクラッチ入力軸13連動のためのギヤ14,14が配置されて、リバーサクラッチ5,6とPTOクラッチ9の並びが、前側のリバーサクラッチ入力軸10伝動のギヤ11,12の並びと、後側のPTOクラッチ入力軸13伝動のギヤ14,15の並びとの間に配置される形態となる。
【0006】
【発明の効果】
請求項1に記載の発明は、内軸2及び外軸4の後端後側部に沿って上下にリバーサクラッチ5,6ギヤ7,8、及びPTOクラッチ9が配置されると共に、これらの前側に沿って上下にリバーサクラッチ入力軸10連動のギヤ11,12や、PTOクラッチ入力軸13連動のギヤ14,15等が配置されるために、これらの前後配置スペースを小さく纏めることができ、これらの油圧操作機構や、後側の主変速ギヤや、PTO変速ギヤ等への連動構成をも簡単化できる。
【0007】
請求項2に記載の発明は、内軸2を外軸4後方でリバーサクラッチ5,6ギヤ7,8の後側部に延長させて、この内軸2の後端からPTOクラッチ入力軸13にギヤ14,15連動するものであるから、上下に並べられるリバーサクラッチ5,6ギヤ7,8とPTOクラッチ9との前側に沿って、リバーサクラッチ入力軸10連動のギヤ11,12を配置し、後側に沿ってこれらギヤ14,15を配置して、前記請求項1に記載の発明と同様の効果を有する。
【0008】
【発明の実施の形態】
この発明の実施例を図面に基づいて説明する。図1、図2において、クラッチハウジング16の後側にミッションケース17やリヤミッションケース18等が連結されて四輪駆動走行形態のトラクタ車体の主体を構成する。このクラッチハウジング16の前側にエンジンボディが連結され、リヤミッションケース18の左右両側部にリヤアクスルハウジング56が連結される。このうちクララッチハウジング16内には主にメインクラッチ3と、リバーサクラッチ5,6、PTOクラッチ9、及びこれらの連動ギヤ機構等が配置され、ミッションケース17内には主に主変速装置や副変速装置等が配置される。リヤミッションケース18には、これら変速連動を受けて左右のリヤアクスルハウジング56内の車軸57へ伝動する差動装置や、PTO軸58の変速装置等を配置する。
【0009】
59は前部のボンネット60下に搭載のエンジン、61はステアリングハンドル、62は運転席、63は前車輪、645は後車輪である。
クラッチハジング16の前上部に内軸2と外軸4が二重軸形態に設けられて、内軸2の前端はエンジン軸1に連結し、外軸4の前端はエンジン軸1と一体のフライホイル19からメインクラッチ3を介して連継されて回転できる。このメインクラッチ3は外軸4の上部に設けられるシフター20によって入り切り操作される。クラッチハウジング16内には前仕切壁21と後仕切壁22があり、これらの仕切壁21,22に各軸が軸受けされる。該内軸2と外軸4の後端部は前仕切壁21に軸受けされる。又、前、後仕切壁21,22間にはリバーサクラッチ5,6ギヤ7,8のリバーサ軸23や、リバーサクラッチ入力軸10、これらの間のカウンタ軸24、及び、PTOクラッチ9やこの入力軸13を回転自在に支持しているPTOクラッチ軸25等を軸受けする。内軸2,外軸4を上位にPTOクラッチ入力軸25を下位にして配置し、これら両軸の間で左右両側部にリバーサクラッチ入力軸10とリバーサ軸23を配置する。
【0010】
リバーサ軸23には、前後一対の多板形態のクラッチ板と、このプレッシャプレートを油圧力で押圧接触できるプッシュシリンダとからなる正転リバーサクラッチ5と、逆転リバーサクラッチ6と設ける。又、これらのリバーサクラッチ5,6の入り(連継)によって一体回転されるリバーサクラッチギヤ7,8がリバーサ軸23に対して回転自在に設けられる。このリバーサ軸23には油路26が設けられて、前仕切壁21の油口からの油圧の給排によって前記リバーサクラッチ5,6のプッシュシリンダを作動させて入り切りすることができる。リバーサクラッチ入力軸10には、該各リバーサクラッチギヤ7,8に常時噛合の入力ギヤ27,28を有し、前端部に一体おギヤ12を有する。このギヤ12は外軸4の後端に一体のギヤ11と常時噛合されて、入力ギヤ27,28を回転して、リバーサクラッチギヤ7,8を伝動回転する。逆転リバーサクラッチギヤ8と入力ギヤ28との間はカウンタ軸24上の逆転カウンタギヤ29を介して噛合回転される。
【0011】
前記PTOクラッチ軸25上には、該リバークラッチ5等と同形態のPTOクラッチ9、及びPTOクラッチ入力軸13が略直下位置に設けられ、このPTOクラッチ軸13の前端に一体のギヤ15を前記内軸2後端のギヤ14とカウンタギヤ30を介して常時噛合させている。このカウンタギヤ30は前記リバーサクラッチ入力軸10の中間部周りに回転自在に軸支させている。このPTOクラッチ9のプッシュシリンダは、後仕切壁22に形成される油路31から給排される油圧力によって作動されて、このPTOクラッチ9が入り切りされて、PTOクラッチ入力軸13からPTOクラッチ軸25へ伝動回転することができる。
【0012】
又、このような形態では、PTOクラッチ入力軸13を前側へ長く形成13Aし、前端のギヤ15を前方に位置15Aさせて、このギヤ15Aを前記カウンタギヤ30に代えてギヤ12に噛合させることによりPTOクラッチ9を伝動回転させる構成とすることもできる。この場合は、前記カウンタギヤ30を省略してより簡単化できる。
【0013】
前記ミッションケース17部には、リバーサ軸23の後端とカップリング32で連結される主変速軸と、各変速カウンタギヤ39や後端ギヤ40を有する変速取出ギヤ軸34と、PTOクラッチ軸25の後端とカップリング35で連結のPTO連動軸36と、該主変速軸33の後方軸芯上に配置される副変速カウンタギヤ軸37と、該変速取出軸34の後方軸芯上に配置されるピニオンギヤ軸38等が配置される。前記主変速軸33上の変速ギヤ41,42,43,44はシンクロ形態の変速クラッチ45,46の切替えによって四段主変速を行うことができる。
【0014】
前記副変速のピニオンギヤ軸38は、後端に作動装置のベベルリングギヤ47に噛合のベベルピニオンギヤ48を有し、副変速を高速、中速、低速の三段に切替る副変速ギヤ49や、カウンタギヤ50、前輪取出ギヤ51等を配置する。この副変速ギヤ49の前後移動によって、前側の変速取出ギヤ34の後端と連結したり、後側のカウンタギヤ50と連結して高、中速に切替できる。副変速カウンタギヤ軸37の各ギヤ部はこれら後端ギヤ40とカウンタギヤ50に噛合していて減速伝動する。この副変速カウンタギヤ49とカウンギヤ50との中間には減速のカウンタギヤ52が軸装されて、この変速ギヤ49を、前記各変速取出ギヤ軸34及びカウンタギヤ50との咬み合いを切離した状態で、このカウンタギヤ52に噛合させることによって低速の減速伝動を得ることができる。
【0015】
前記PTO連動軸36上には前記前輪取出ギヤ51と噛合のカウンタギヤ53が設けられて、ミッションケース17及びクラッチハウジング16の底部に沿って軸支される前輪連動軸54のクラッチギヤ55と噛合され、前車輪の伝動を入り切りできる。
【0016】
次に、主として図3に基づいて上例と異なる点は、前記PTOクラッチ入力軸13を伝動するためのギヤ14,30,15並び列をリバーサクラッチ5,6やPTOクラッチ9等の並び列の後側に沿わせて配置したものである。このため内軸2は外軸4後端よりも後方へ長く伸ばし、カウンタギヤ30はリバーサクラッチ入力軸10の後側部の後仕切壁22に軸受し、PTOクラッチ入力軸13はPTOクラッチ9の後側に設けて、これらリバーサクラッチ5,6やPTOクラッチ9等を前側のギヤ11,12列側に接近させている。又、PTOクラッチ9のプッシュシリンダを作動させるための油路31は前仕切壁21側から連絡するように構成される。
【0017】
次に、主として図4〜図6に基づいて、上例と異なる点は、前記ミッションケース17における走行伝動装置を、前後車輪63,64駆動の4WDで、主変速4速、副変速3速の12速仕様と、後車輪64駆動2WDで、主変速4速、副変速2速の8速仕様との構成を簡単で、安価に得るものである。内軸2のギヤ14はリバーサクラッチ入力軸10の入力ギヤ27に噛合させ、リバーサクラッチ5,6はシンクロ形態として、内軸2からリバーサクラッチ入力軸10を伝動し、外軸4からPTOクラッチ入力軸13を伝動する構成としている。又、変速ギヤ41,42,43,44は主変速シフタ65で切替移動操作させる形態で、この主変速軸33はリバーサクラッチ入力軸10の後方軸芯線上に設けられ、変速カウンタギヤ39を配置する変速入力軸66が、リバーサ軸23の後方に一体回転するように設けられる。変速入力軸66の後方軸芯線上に副変速カウンタギヤ軸37が設けられ、主変速軸33の後方軸芯線上にピニオンギヤ軸48が設けられる。副変速シフタ67は、変速クラッチリング68を後端ギヤ40と副変速ギヤ49とに咬み替えでき、副変速ギヤ69をカウンタギヤ50に噛合させることができる。この副変速ギヤ69は、カウンタギヤ53と共にPTO連動軸36上に回転自在の外軸70と一体に設けられる。図4、図5の構成では変速ギヤ41,42,43,44により四段の主変速を行うことができ、変速クラッチリング68と副変速ギヤ69により三段の副変速を行うことができ、合計十二段の変速操作を行う4WD、十二段変速仕様の構成とすることができる。
【0018】
このような十二段変速仕様を2WD、八段変速仕様とするには、図6のように、ピニオンギヤ軸38上にクンタギヤ50,51を設けないで、PTO連動軸36上に副変速ギヤ69やカウンタギヤ53等を有した外軸70を設けないようにし、更に前輪連動軸54を設けない形態とする。このため、副変速は変速クラッチリング68による後速と中速の二段副変速とする。71は主変速アーム73を支持するアーム軸、72は副変速アーム74を支持するアーム軸で、前記主変速シフタ65や副変速シフタ67を操作連動するものである。
【0019】
次に、主として、図7〜図9に基づいて上例と異なる点は、トラクタ仕様等の異なるために、ミッションケース17の主変速シフタ65乃至主変速アーム軸71や、副変速シフタ67乃至副変速アーム軸73等と、運転席62乃至ステアリングハンドル61等との関係位置が長、短に異なる形態となる場合は、これら主変速レバー75や副変速レバー76を一定位置にればー軸77,78で支持したレバーブラケット79を、ミッションケース17の外側面に一体として凸出させた所定形態の取付座80に体して前後位置を適宜に変えて取付ける。これによって主、副変速レバー75,76のステアリングハンドル61等に対する関係位置をいずれの仕様のトラクタにおいても略同位に設定して、操作性を良好に維持するものである。レバーブラケット79には適数のボルト挿通穴81が配置形成され、この各穴81に対向するボルト穴82,83,84を取付座80に車体の長さ等の規格仕様に応じて前後適数個所に配置形成する。この場合ミッションケース17を共用化する場合は、同一ミッションケース17の取付座80に複数の各ボルト穴82,83,84を予め形成しておくことによって、車体長さが標準長である場合は図7のように前後中間部のボルト穴82にレバーブラケット79の穴81を合せてボルト締めすればよい。又、車体長さがこれよりも長い場合は図8のようにレバーブラケット79を前側のボルト穴83に取付け、逆に車体長さが短い場合は図9のように後側のボルト穴84に取付ける。
【0020】
このようなレバーブラケット79の取付位置をミッションケース17に対して前後に変更する形態では、前記アーム軸71,73とシフタ65,67の位置が変らないで一定している場合でも、レバーブラケット79のレバー軸77,78とアーム軸71,73との関係位置が変るために、これらの間の連動リンク85,86などの長さ等は調節したり、適切な長さのリンクを取付けることによって連動設定できる。
【図面の簡単な説明】
【図1】トラクタの伝動機構図。
【図2】トラクタの側面図。
【図3】一部別実施例を示す伝動機構図。
【図4】一部別実施例を示す伝動機構図。
【図5】その一部の拡大図。
【図6】その一部変更した場合の同拡大図。
【図7】その変速レバー取付部の側面図。
【図8】その取付状態を示す側面図。
【図9】その取付状態を示す側面図。
【符号の説明】
1 エンジン軸
2 内軸
3 メインクラッチ
4 外軸
5 リバーサクラッチ(正転)
6 リバーサクラッチ(逆転)
7 リバーサクラッチギヤ(正転)
8 リバーサクラッチギヤ(逆転)
9 PTOクラッチ
10 リバーサクラッチ入力軸
11 ギヤ
12 ギヤ
13 PTOクラッチ入力軸
14 ギヤ
15 ギヤ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transmission device for a tractor, and a transmission mechanism for interlocking a transmission device of a transmission case on the rear side with a PTO shaft or the like from an engine shaft to a front side can be used for a tractor having an internal clutch housing or a transmission case.
[0002]
[Prior art]
The main clutch and the reverse clutch are provided in the front clutch housing, while the PTO clutch is provided in the rear transmission case.
[0003]
[Problems to be solved by the invention]
Since the reverser clutch, the independent PTO clutch, and the like use a multi-plate clutch operated by hydraulic pressure operation, the configuration of the transmission mechanism is complicated. In particular, if these clutches are mixed between the main transmission gear, the auxiliary transmission gear, the PTO transmission gear, and the like, the assembly and disassembly become complicated, and the configuration of the hydraulic operation system is dispersed back and forth. It gets complicated. According to the present invention, these clutches are collectively provided in a clutch housing and are separated from a main transmission gear, a sub transmission gear, a PTO transmission gear, and the like, thereby simplifying the configuration inside the clutch housing.
[0004]
[Means for Solving the Problems]
According to the first aspect of the present invention, an outer shaft 4 that is interlocked and rotated via a main clutch 3 is provided on an outer periphery of an inner shaft 2 that is directly interlocked with the engine shaft 1, and the inner shaft 2 and the outer shaft 4 are provided at rear ends thereof. Reverser clutches 5, 6, gears 7, 8 and a PTO clutch 9 are arranged vertically on the side, a reverser clutch input shaft 10 is interlocked with gears 11, 12 from the rear end of the outer shaft 4, and a PTO clutch is mounted from the rear end of the inner shaft 2. The transmission of the tractor is characterized in that the input shaft 13 is interlocked with the gears 14 and 15. The rotation of the engine shaft 1 causes the inner shaft 2 to rotate directly in conjunction with the transmission, and is transmitted from the PTO clutch input shaft 13 to the PTO clutch 9. When the PTO clutch 9 is engaged, the rear PTO shaft is transmitted. When the main clutch 3 is engaged, the reverse shaft input shaft 10 is transmitted via the outer shaft 4, and when the forward rotation reverse clutch 5 or the reverse rotation reverse clutch 6 is engaged, the rear main transmission gear or the like is rotated forward or backward. To transmit. The reversing clutches 5, 6, gears 7, 8 and the PTO clutch 9 are arranged substantially vertically above and behind the rear ends of the inner shaft 2 and the outer shaft 4, and are connected between the inner shaft 2 and the PTO clutch input shaft 13. The gears 14, 15 and the like interlocking between them, and the gears 11, 12 and the like interlocking between the outer shaft 4 and the reversing clutch input shaft 10, move up and down along the front side of the reversing clutches 5, 6 and the PTO clutch 9, etc. Placed in
[0005]
According to a second aspect of the present invention, an outer shaft 4 which is interlocked and rotated via a main clutch 3 is provided on an outer periphery of an inner shaft 2 which is adjusted and interlocked with the engine shaft 1, and a rear end of the inner shaft 2 and a rear end of the outer shaft 4 are provided. Reverser clutches 5, 6, gears 7, 8 and a PTO clutch 9 are vertically arranged between the end portions, and a reverser clutch input shaft 10 is interlocked with the gears 11, 12 from the rear end of the outer shaft 4 to form a rear end of the inner shaft 2. Therefore, the transmission of the tractor is characterized in that the PTO clutch input shaft 13 is interlocked with the gears 14, 15. Here, the difference from the first aspect of the present invention is that the inner shaft 2 is extended rearward longer than the reversing clutches 5, 6, gears 7, 8 and the PTO clutch 9, and the PTO clutch Gears 14 and 14 for interlocking the input shaft 13 are arranged, and the arrangement of the reversing clutches 5 and 6 and the PTO clutch 9 is changed to the arrangement of the gears 11 and 12 for transmitting the front reversing clutch input shaft 10 and the rear PTO. The clutch input shaft 13 is arranged between the transmission of the gears 14 and 15 for transmission.
[0006]
【The invention's effect】
According to the first aspect of the present invention, the reversing clutches 5, 6 gears 7, 8 and the PTO clutch 9 are disposed vertically along the rear end portions of the rear ends of the inner shaft 2 and the outer shaft 4, and the front side of these reverse clutches. The gears 11 and 12 interlocked with the reversing clutch input shaft 10 and the gears 14 and 15 interlocked with the PTO clutch input shaft 13 are arranged along the vertical direction, so that the front and rear arrangement space can be reduced. , The interlocking structure with the rear main transmission gear, the PTO transmission gear, and the like can be simplified.
[0007]
According to the second aspect of the present invention, the inner shaft 2 is extended to the rear side of the reversing clutches 5, 6 gears 7, 8 behind the outer shaft 4, and from the rear end of the inner shaft 2 to the PTO clutch input shaft 13. Since the gears 14 and 15 are interlocked, the gears 11 and 12 interlocked with the reversal clutch input shaft 10 are arranged along the front side of the PTO clutch 9 and the reverser clutches 5 and 6 gears 7 and 8 arranged vertically. By arranging these gears 14 and 15 along the rear side, the same effects as those of the first aspect of the invention are obtained.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. 1 and 2, a transmission case 17 and a rear transmission case 18 are connected to the rear side of the clutch housing 16 to constitute a main body of a tractor body in a four-wheel drive mode. An engine body is connected to the front side of the clutch housing 16, and a rear axle housing 56 is connected to left and right sides of the rear transmission case 18. The main clutch 3, the reverse clutches 5 and 6, the PTO clutch 9, and their interlocking gear mechanisms are mainly disposed in the clutch housing 16, and the main transmission and the auxiliary transmission are mainly disposed in the transmission case 17. A transmission and the like are arranged. In the rear transmission case 18, there are arranged a differential that transmits the axles to the axle 57 in the left and right rear axle housings 56 in response to the speed change interlocking, a transmission for the PTO shaft 58, and the like.
[0009]
Reference numeral 59 denotes an engine mounted below the front hood 60, 61 denotes a steering handle, 62 denotes a driver's seat, 63 denotes front wheels, and 645 denotes rear wheels.
An inner shaft 2 and an outer shaft 4 are provided in a double shaft configuration at a front upper portion of the clutch housing 16, and a front end of the inner shaft 2 is connected to the engine shaft 1, and a front end of the outer shaft 4 is integrated with the engine shaft 1. The flywheel 19 is connected via the main clutch 3 and can be rotated. The main clutch 3 is turned on and off by a shifter 20 provided above the outer shaft 4. A front partition wall 21 and a rear partition wall 22 are provided in the clutch housing 16, and each shaft is supported by these partition walls 21 and 22. The rear ends of the inner shaft 2 and the outer shaft 4 are supported by a front partition wall 21. Also, between the front and rear partition walls 21 and 22, the reversing shaft 23 of the reversing clutch 5, 6 gear 7, 8, the reversing clutch input shaft 10, the counter shaft 24 therebetween, the PTO clutch 9, and the input thereof A PTO clutch shaft 25 that rotatably supports the shaft 13 and the like are supported. The inner shaft 2 and the outer shaft 4 are arranged on the upper side and the PTO clutch input shaft 25 is arranged on the lower side, and the reversing clutch input shaft 10 and the reversing shaft 23 are arranged on both left and right sides between these two shafts.
[0010]
The reversing shaft 23 is provided with a pair of front and rear clutch plates in the form of a multi-plate, a forward reversing clutch 5 including a push cylinder capable of pressing and contacting the pressure plate with hydraulic pressure, and a reversing reversing clutch 6. In addition, the reversing clutch gears 7, 8 which are integrally rotated by the engagement (connection) of the reversing clutches 5, 6 are provided rotatably with respect to the reversing shaft 23. An oil passage 26 is provided in the reversing shaft 23, and the push cylinders of the reversing clutches 5, 6 can be turned on and off by supplying and discharging hydraulic pressure from an oil port of the front partition 21. The reversing clutch input shaft 10 has input gears 27 and 28 which are always meshed with the respective reversing clutch gears 7 and 8, and has an integral gear 12 at the front end. The gear 12 is always meshed with the integrated gear 11 at the rear end of the outer shaft 4 to rotate the input gears 27 and 28 to drive and rotate the reverser clutch gears 7 and 8. The reverse rotation reversing clutch gear 8 and the input gear 28 are meshed and rotated via a reverse rotation counter gear 29 on the counter shaft 24.
[0011]
On the PTO clutch shaft 25, a PTO clutch 9 having the same configuration as the reverse clutch 5 and the like, and a PTO clutch input shaft 13 are provided at a position almost directly below. The gear 14 at the rear end of the inner shaft 2 is always meshed with the gear 14 via a counter gear 30. This counter gear 30 is rotatably supported around an intermediate portion of the reverser clutch input shaft 10. The push cylinder of the PTO clutch 9 is actuated by oil pressure supplied and discharged from an oil passage 31 formed in the rear partition wall 22, and the PTO clutch 9 is turned on and off. 25.
[0012]
Further, in such a form, the PTO clutch input shaft 13 is formed to be long 13A toward the front side, the gear 15 at the front end is positioned 15A forward, and the gear 15A is engaged with the gear 12 instead of the counter gear 30. Thus, the PTO clutch 9 can be driven to rotate. In this case, the counter gear 30 can be omitted to simplify the operation.
[0013]
The transmission case 17 includes a main transmission shaft connected to the rear end of the reversing shaft 23 by a coupling 32, a transmission take-out gear shaft 34 having respective transmission counter gears 39 and a rear end gear 40, and a PTO clutch shaft 25. PTO interlocking shaft 36 connected to the rear end by a coupling 35, an auxiliary transmission counter gear shaft 37 disposed on the rear axis of the main transmission shaft 33, and disposed on a rear axis of the transmission take-out shaft 34. A pinion gear shaft 38 and the like are arranged. The transmission gears 41, 42, 43, 44 on the main transmission shaft 33 can perform four-step main transmission by switching the transmission clutches 45, 46 in a synchronized form.
[0014]
The sub-transmission pinion gear shaft 38 has a bevel pinion gear 48 meshed with a bevel ring gear 47 of an operating device at the rear end, a sub-transmission gear 49 for switching the sub-transmission into three stages of high speed, medium speed, and low speed, and a counter. The gear 50, the front wheel take-out gear 51 and the like are arranged. By the forward and backward movement of the auxiliary transmission gear 49, it can be connected to the rear end of the front transmission take-out gear 34 or connected to the rear counter gear 50 to switch between high and medium speeds. Each gear portion of the sub-transmission counter gear shaft 37 meshes with the rear-end gear 40 and the counter gear 50 to transmit a reduction gear. A deceleration counter gear 52 is axially mounted between the auxiliary transmission counter gear 49 and the counter gear 50, and the transmission gear 49 is disengaged from the gears 34 and the counter gear 50. By engaging with the counter gear 52, a low-speed reduction transmission can be obtained.
[0015]
A counter gear 53 meshing with the front wheel take-out gear 51 is provided on the PTO interlocking shaft 36, and meshes with a clutch gear 55 of a front wheel interlocking shaft 54 that is axially supported along the bottom of the transmission case 17 and the clutch housing 16. The transmission of the front wheels can be turned on and off.
[0016]
Next, the difference from the above example mainly based on FIG. 3 is that the row of gears 14, 30, 15 for transmitting the PTO clutch input shaft 13 is the same as the row of reverser clutches 5, 6, PTO clutch 9, and the like. It is arranged along the rear side. For this reason, the inner shaft 2 extends rearward longer than the rear end of the outer shaft 4, the counter gear 30 is mounted on the rear partition wall 22 on the rear side of the reverse clutch input shaft 10, and the PTO clutch input shaft 13 is connected to the PTO clutch 9. Provided on the rear side, the reverser clutches 5, 6 and the PTO clutch 9 are brought closer to the front gears 11, 12 row side. Further, an oil passage 31 for operating the push cylinder of the PTO clutch 9 is configured to communicate from the front partition wall 21 side.
[0017]
Next, mainly based on FIGS. 4 to 6, the point different from the above example is that the traveling transmission in the transmission case 17 is a 4WD driven by the front and rear wheels 63, 64, and has four main speeds and three sub speeds. A simple and inexpensive configuration of a 12-speed specification and an 8-speed specification with a main wheel 4 speed and a sub speed 2 speed with rear wheel 64 drive 2WD. The gear 14 of the inner shaft 2 is meshed with the input gear 27 of the reverse clutch input shaft 10, and the reverse clutches 5, 6 are in a synchronized form to transmit the reverse shaft input shaft 10 from the inner shaft 2 and the PTO clutch input from the outer shaft 4. It is configured to transmit the shaft 13. The transmission gears 41, 42, 43, and 44 are switched by a main transmission shifter 65, and the main transmission shaft 33 is provided on the rear axis of the reverser clutch input shaft 10, and a transmission counter gear 39 is provided. A shift input shaft 66 is provided behind the reversing shaft 23 so as to rotate integrally therewith. The sub-transmission counter gear shaft 37 is provided on the rear axis of the transmission input shaft 66, and the pinion gear shaft 48 is provided on the rear axis of the main transmission shaft 33. The auxiliary transmission shifter 67 can change the transmission clutch ring 68 between the rear end gear 40 and the auxiliary transmission gear 49, and can engage the auxiliary transmission gear 69 with the counter gear 50. The auxiliary transmission gear 69 is provided on the PTO interlocking shaft 36 together with the counter gear 53 and integrally with the rotatable outer shaft 70. 4 and 5, a four-speed main shift can be performed by the transmission gears 41, 42, 43, and 44, and a three-speed auxiliary shift can be performed by the transmission clutch ring 68 and the auxiliary transmission gear 69. It is possible to adopt a configuration of a 4WD, 12-speed shift specification for performing a total of 12 speed shift operations.
[0018]
In order to make such a 12-speed transmission specification a 2WD and an 8-speed transmission specification, as shown in FIG. 6, without providing the counter gears 50 and 51 on the pinion gear shaft 38, the auxiliary transmission gear 69 is provided on the PTO interlocking shaft 36. And the outer shaft 70 having the counter gear 53 and the like is not provided, and the front wheel interlocking shaft 54 is not provided. Therefore, the sub-shift is a two-stage sub-shift of the rear speed and the middle speed by the transmission clutch ring 68. Reference numeral 71 denotes an arm shaft that supports the main transmission arm 73, and reference numeral 72 denotes an arm shaft that supports the sub transmission arm 74. The arm shaft operates and operates the main transmission shifter 65 and the sub transmission shifter 67.
[0019]
Next, mainly the difference from the above example based on FIGS. 7 to 9 is that the main transmission shifter 65 to the main transmission arm shaft 71 and the sub transmission shifter 67 to the sub transmission When the relationship between the shift arm shaft 73 and the like and the driver's seat 62 to the steering handle 61 and the like is different from each other in a long or short form, if the main shift lever 75 and the sub shift lever 76 are at a fixed position, the shaft 77 , 78 are mounted on a mounting seat 80 of a predetermined form integrally protruding from the outer side surface of the transmission case 17 and mounted with the front and rear positions appropriately changed. Thereby, the relative positions of the main and auxiliary transmission levers 75 and 76 with respect to the steering handle 61 and the like are set to be substantially the same in the tractors of any specifications, thereby maintaining good operability. An appropriate number of bolt insertion holes 81 are arranged and formed in the lever bracket 79, and bolt holes 82, 83, 84 opposed to the respective holes 81 are provided in the mounting seat 80 in an appropriate number in front and rear according to standard specifications such as the length of the vehicle body. It is arranged and formed at each location. In this case, when the transmission case 17 is shared, a plurality of bolt holes 82, 83, 84 are formed in advance in the mounting seat 80 of the same transmission case 17, and when the vehicle body length is a standard length, As shown in FIG. 7, the holes 81 of the lever bracket 79 may be aligned with the bolt holes 82 at the front and rear intermediate portions, and then bolted. When the vehicle body length is longer than this, the lever bracket 79 is attached to the front bolt hole 83 as shown in FIG. 8, and conversely, when the vehicle body length is short, the lever bracket 79 is inserted into the rear bolt hole 84 as shown in FIG. Attach.
[0020]
In such a form in which the mounting position of the lever bracket 79 is changed back and forth with respect to the transmission case 17, even if the positions of the arm shafts 71 and 73 and the shifters 65 and 67 are constant without changing, the lever bracket 79 is not changed. Since the relative positions of the lever shafts 77 and 78 and the arm shafts 71 and 73 change, the lengths and the like of the interlocking links 85 and 86 between them can be adjusted, or a link of an appropriate length can be attached. Can be linked.
[Brief description of the drawings]
FIG. 1 is a diagram of a transmission mechanism of a tractor.
FIG. 2 is a side view of the tractor.
FIG. 3 is a transmission mechanism diagram showing a partially different embodiment.
FIG. 4 is a transmission mechanism diagram showing a partially different embodiment.
FIG. 5 is an enlarged view of a part thereof.
FIG. 6 is an enlarged view of the same when a part thereof is changed.
FIG. 7 is a side view of the transmission lever mounting portion.
FIG. 8 is a side view showing the attached state.
FIG. 9 is a side view showing the attached state.
[Explanation of symbols]
1 Engine shaft 2 Inner shaft 3 Main clutch 4 Outer shaft 5 Reversa clutch (forward rotation)
6 Reverse Scratch (Reverse)
7 Reverse clutch gear (forward rotation)
8 Reverse clutch gear (reverse rotation)
9 PTO clutch 10 Reverser clutch input shaft 11 Gear 12 Gear 13 PTO clutch input shaft 14 Gear 15 Gear

Claims (2)

エンジン軸1に直接連動の内軸2の外周にメインクラッチ3を介して連動回転される外軸4を設け、これら内軸2及び外軸4の後端後側部においてリバーサクラッチ5,6ギヤ7,8とPTOクラッチ9を上下に配置し、この外軸4後端からリバーサクラッチ入力軸10をギヤ11,12連動し、内軸2後端からPTOクラッチ入力軸13をギヤ14,15連動することを特徴とするトラクタの伝動装置。An outer shaft 4 that is interlocked and rotated via a main clutch 3 is provided on an outer periphery of an inner shaft 2 that is directly interlocked with the engine shaft 1, and a reversing clutch 5 and 6 gears are provided at rear rear portions of the inner shaft 2 and the outer shaft 4. 7, 8 and the PTO clutch 9 are arranged vertically, the reversing clutch input shaft 10 is interlocked with the gears 11 and 12 from the rear end of the outer shaft 4, and the PTO clutch input shaft 13 is interlocked with the gears 14 and 15 from the rear end of the inner shaft 2. A transmission for a tractor, comprising: エンジン軸1に調節連動の内軸2の外周にメインクラッチ3を介して連動回転される外軸4を設け、これら内軸2後端部と外軸4後端部との間においてリバーサクラッチ5,6ギヤ7,8とPTOクラッチ9を上下に配置し、この外軸4後端からリバーサクラッチ入力軸10をギヤ11,12連動し、内軸2後端からPTOクラッチ入力軸13をギヤ14,15連動することを特徴とするトラクタの伝動装置。An outer shaft 4 which is interlocked and rotated via a main clutch 3 is provided on the outer periphery of an inner shaft 2 which is interlocked with the engine shaft 1 via a main clutch 3, and a reversing clutch 5 is provided between the rear end of the inner shaft 2 and the rear end of the outer shaft 4. , 6 gears 7 and 8 and a PTO clutch 9 are arranged vertically, the reverser clutch input shaft 10 is interlocked with the gears 11 and 12 from the rear end of the outer shaft 4, and the PTO clutch input shaft 13 is shifted from the rear end of the inner shaft 2 to the gear 14. , 15 in conjunction with a tractor transmission.
JP2003009895A 2003-01-17 2003-01-17 Tractor Expired - Lifetime JP4292339B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007004312A1 (en) * 2005-07-06 2007-01-11 Yanmar Co., Ltd. Tractor
KR101586842B1 (en) 2014-06-25 2016-02-02 (주)예성이엔지 Multifunction for tractors transmission powertrain is available

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007004312A1 (en) * 2005-07-06 2007-01-11 Yanmar Co., Ltd. Tractor
JP2007015521A (en) * 2005-07-06 2007-01-25 Yanmar Co Ltd Tractor
KR101586842B1 (en) 2014-06-25 2016-02-02 (주)예성이엔지 Multifunction for tractors transmission powertrain is available

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