JPS6390437A - Running transmission structure for farm tractor - Google Patents

Running transmission structure for farm tractor

Info

Publication number
JPS6390437A
JPS6390437A JP23664386A JP23664386A JPS6390437A JP S6390437 A JPS6390437 A JP S6390437A JP 23664386 A JP23664386 A JP 23664386A JP 23664386 A JP23664386 A JP 23664386A JP S6390437 A JPS6390437 A JP S6390437A
Authority
JP
Japan
Prior art keywords
transmission
front wheel
pair
input shaft
speed
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
JP23664386A
Other languages
Japanese (ja)
Other versions
JPH0422738B2 (en
Inventor
Akira Teraoka
璋 寺岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP23664386A priority Critical patent/JPS6390437A/en
Publication of JPS6390437A publication Critical patent/JPS6390437A/en
Publication of JPH0422738B2 publication Critical patent/JPH0422738B2/ja
Granted legal-status Critical Current

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  • Motor Power Transmission Devices (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)
  • Retarders (AREA)

Abstract

PURPOSE:To make smooth the transmission of power from a running transmission to a front wheel transmission casing, by incorporating a front wheel speed change gear in the front wheel transmission casing at a position downstream of an input shaft in transmission. CONSTITUTION:Output torque is transmitted from a running transmission 9 to a rear wheel differential gear mechanism 13 incorporated in a mission casing 8. A front wheel output shaft 14 which is provided in the running transmission 9 so that it projects forward from a mission casing 8, is associatingly coupled with an input shaft 16 which projects rearward from a front wheel transmission casing 5 at a level lower than that of a front wheel output shaft 14, through the intermediary of a rotary shaft 15. Torque is transmitted from the input shaft 16 to a front wheel transmission mechanism 19 through a reduction bevel gear 17 incorporated in the front wheel transmission casing 5 and a front wheel speed change gear 18.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、走行用トランスミッションを機体後部に配置
し、左右一対の前車輪が走行自在に取付けられた前輪用
伝動ケースを入力軸が前記走行用トランスミッションの
前輪用出力軸より低いレベルに位置する状態で設け、一
対の前記前車輪の平均周速度と左右一対の後車輪の平均
周速度とを同一またはほぼ同一にする標準伝動状態と、
一対の前記前車輪の平均周速度を一対の前記後車輪の平
均周速度より大にする増速伝動状態とに切換え自在な前
輪変速装置を設けた農用トラクターの走行用伝動構造に
関する。
[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a driving transmission disposed at the rear of the aircraft body, and an input shaft that connects a front wheel transmission case to which a pair of left and right front wheels are mounted so as to be freely travelable. a standard transmission state in which the average circumferential speed of the pair of front wheels is the same or almost the same as the average circumferential speed of the pair of left and right rear wheels;
The present invention relates to a driving transmission structure for an agricultural tractor, which is provided with a front wheel transmission that can be switched to an increased speed transmission state in which the average circumferential speed of the pair of front wheels is higher than the average circumferential speed of the pair of rear wheels.

〔従来の技術〕[Conventional technology]

上記農用トラクターは、前車輪の操向操作に併わせ、前
輪変速装置を増速伝動状態に切換えて前輪を増速駆動す
ることにより、前輪が機体を引張り旋回させるために、
前輪周速を後輪周速と同一にしておくよりも小半径で旋
回できるように配慮されたものである。
The agricultural tractor mentioned above switches the front wheel transmission to an increased speed transmission state in conjunction with the steering operation of the front wheels to drive the front wheels at increased speed, so that the front wheels pull the machine and turn.
This is designed to enable turning with a smaller radius than keeping the front wheel circumferential speed the same as the rear wheel circumferential speed.

この種農用トラクターにおいて、従来、例えば実開昭5
9−66627号公報に示されるように、前輪変速装置
を機体後部に位置する走行用トランスミッションに付設
されていた。
Conventionally, in this type of agricultural tractor, for example,
As shown in Japanese Patent No. 9-66627, a front wheel transmission was attached to a traveling transmission located at the rear of the fuselage.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

農用トラクターにあってはロークリ耕耘装置等の各種作
業装置を機体後部に連結することが多く、またこの作用
装置連結時には、機体後部に掛かる作業装置重量のため
に前輪に掛かる荷重が作業装置非連結時よりも減少して
前輪の増速駆動時における小廻り旋回作用が低下するこ
とを防止したり抑制するように、機体前部にバランスウ
ェイトを取付けることがある。このようにバランスウェ
イト装着をするに当り、従来の場合、前輪変速装置の重
量が前輪側よりも後輪側により多く掛かることから、装
着ウェイトの重量を大にせねばならなかった。
In agricultural tractors, various working devices such as a row tiller are often connected to the rear of the machine, and when this working device is connected, the weight of the working device on the rear of the machine causes the load on the front wheels to be reduced when the working device is not connected. A balance weight may be attached to the front of the fuselage in order to prevent or suppress a reduction in the turning effect when the front wheels are driven at increased speed. When installing balance weights in this way, in the conventional case, the weight of the front wheel transmission is more on the rear wheels than on the front wheels, so the weight of the installed weights had to be increased.

本発明の目的は、バランスウェイト装着が必要な場合で
も、増速前輪の小廻り作用を十分に発揮させることが装
着ウェイトを極力軽量なものにしながらできるようにし
、しかも、走行用トランスミッションから前輪用伝動ケ
ースへの伝動がスムーズにできるようにすることにある
An object of the present invention is to make it possible to fully utilize the small turning action of the speed-increasing front wheels even when it is necessary to install balance weights, while making the weights installed as light as possible. The purpose is to enable smooth transmission of power to the transmission case.

〔問題点を解決するための手段〕[Means for solving problems]

本発明の特徴構成は、奮起した農用トラクターの走行用
伝動構造において、前記前輪変速装置を前記入力軸より
伝動下手側に位置させて前記前輪用伝動ケースに内装し
てあることにあり、その作用及び効果は次のとおりであ
る。
A characteristic configuration of the present invention is that, in the driving transmission structure for an agricultural tractor, the front wheel transmission is located on the lower side of the transmission from the input shaft and is internally housed in the front wheel transmission case. And the effects are as follows.

〔作 用〕[For production]

走行用トランスミッションから前輪用伝動ケースに伝動
するための回転軸は、トランスミッション入力軸と伝動
ケース入力軸とのレベル差に起因してトランスミッショ
ン入力軸及び前輪側入力軸の夫々に対して傾斜すること
になる。
The rotating shaft for transmitting power from the driving transmission to the front wheel transmission case is inclined with respect to the transmission input shaft and the front wheel side input shaft, respectively, due to the level difference between the transmission input shaft and the transmission case input shaft. Become.

従って、前輪変速装置を前輪用伝動ケースにこれの入力
軸より伝動下手側に位置させて内装すると、前記入力軸
より伝動上手側に位置させて前輪用伝動ケースに付設し
て前輪変速装置の入力軸が伝動ケース軸より後方や上方
に位置する構成を採用するに比して前記回転軸の前記傾
斜を緩るく抑えながら、前輪変速装置をこれの重量が前
輪側に従来よい多く掛かるようにしながら備えさせられ
る。
Therefore, if the front wheel transmission is installed internally in the front wheel transmission case and located on the lower side of the transmission than the input shaft, the front wheel transmission is installed inside the front wheel transmission case and positioned on the upper side of the transmission from the input shaft. Compared to adopting a configuration in which the shaft is located behind or above the transmission case shaft, the inclination of the rotating shaft is suppressed gently, and the weight of the front wheel transmission is placed more on the front wheels than conventionally. However, I am prepared.

〔発明の効果〕〔Effect of the invention〕

増速状態の前車輪が機体旋回作用を十分に発揮するよう
に前輪接地圧を十分なものに確保するに当り、前部バラ
ンスウェイトを装着する必要が生じたとしても、前輪変
速装置の重量が前輪側に従来より多く掛かっていること
から、バランスウェイトを従来より軽量なので済ませら
れるようになり、作業装置の連結や分離に伴って必要に
なるバランスウェイトの着脱が楽にできるようにできた
Even if it becomes necessary to install a front balance weight in order to ensure sufficient front wheel ground pressure so that the front wheels can fully exert the aircraft turning action when the speed is increased, the weight of the front wheel transmission is Since more weight is placed on the front wheel than before, the balance weight is lighter than before and can be used easily, making it easier to attach and detach the balance weight that is required when connecting and separating working equipment.

その上、走行用トランスミッションから前輪用伝動ケー
スに伝動するための回転軸のトランスミッション出力軸
や伝動ケース入力軸に対する傾斜を比較的緩傾斜に済ま
せ得ることから、走行用トランスミッションから前輪用
伝動ケ°−スへの伝動が回転軸の前記傾斜に起因する腰
折れにかかわらず騒音が、発生しないようにしながらあ
るいは少ないようにしながらスムーズにできるようにな
り、作業が快適にできるようになった。
Furthermore, since the rotating shaft for transmitting power from the driving transmission to the front wheel transmission case can be tilted relatively gently with respect to the transmission output shaft and the transmission case input shaft, It is now possible to smoothly transmit power to the base while preventing or reducing noise, regardless of the bending caused by the inclination of the rotating shaft, and work can now be carried out comfortably.

〔実施例〕〔Example〕

第1図に示すように、左右一対の前車輪(1a)。 As shown in FIG. 1, a pair of left and right front wheels (1a).

(1b)を操向操作及び駆動可能に有し、かつ、左右一
対の非操向型の後車輪(2a) 、 (2b)を駆動可
能に有した走行機体の後部に、ロータリ耕耘装置等の各
種作業装置を昇降操作可能に連結するリフトアーム(3
)、及び、連結作業装置に伝動する動力取出し軸(4)
を付設して、農用トラクターを構成してある。
(1b) so that it can be steered and driven, and a pair of left and right non-steering type rear wheels (2a), (2b) that can be driven. Lift arm (3
), and a power take-off shaft (4) that transmits power to the connecting work device
is attached to form an agricultural tractor.

一対の前記前車輪(1a) 、 (1b)は、これら前
車輪(1a) 、 (1b)が両端側に各別に取付けら
れた前   □輪周伝動ケース(5)を介して機体フレ
ーム(6)に取付けである。そして、前記前輪用伝動ケ
ース(5)は左右中間箇所に配置した機体前後方向軸芯
(P、)の周りで揺動するように機体フレーム(6)に
連結してあり、走行地盤の凹凸にかかわらず、一対の前
車輪(1a) 、 (1b)が前輪用伝動ケース(5)
の対機体揺動のために機体に対して反背昇降し、機体を
前後方向視で水平またはこれに近い姿勢に維持するよう
に構成してある。前記前輪用伝動ケース(5)は第2図
に示すように、機体側ケース部分(5a)と、この機体
側ケース部分(5a)の両端部に各別に機体上下方向軸
芯(P2)の周りで揺動するように連結した一対の車輪
側ケース部分(5b) 、 (5b)とから構成してあ
り、車輪側ケース部分(5b)がナックルアーム(7)
により前記軸芯(P2)の周りで揺動操作されて前車輪
(1a) 、 (Ib)が操向操作されるように構成し
てある。
The pair of front wheels (1a) and (1b) are connected to the fuselage frame (6) via a circumferential transmission case (5), which is attached to both ends separately. It is installed on. The front wheel transmission case (5) is connected to the fuselage frame (6) so as to swing around the longitudinal axis (P,) of the fuselage, which is located between the left and right sides, and is able to handle unevenness of the running ground. Regardless, the pair of front wheels (1a) and (1b) are the front wheel transmission case (5).
The structure is such that the aircraft is raised and lowered against the aircraft body in order to swing relative to the aircraft body, and maintains the aircraft in a horizontal or nearly horizontal attitude when viewed from the front and back. As shown in Fig. 2, the front wheel transmission case (5) has a fuselage-side case part (5a) and two ends of the fuselage-side case part (5a) each having separate parts around the vertical axis (P2) of the fuselage. It consists of a pair of wheel side case parts (5b) and (5b) connected to swing at the knuckle arm (7).
The front wheels (1a) and (Ib) are configured to be pivoted around the axis (P2) to steer the front wheels (1a) and (Ib).

前車輪(1a) 、 (1b)及び後車輪(2a) 、
 (2b)の駆動を可能にするに、機体後部を形成して
あるミッションケース(8)に走行用トランスミッショ
ンケース(9)を内装すると共に、エンジン(10)の
出力をクラッチ(11)及び回転軸(12)を介して前
記走行用トランスミッション(9)に伝達するように構
成し、そして、走行用トランスミッション(9)の回転
出力を前記ミッションケース(8)に内装の後輪用差動
機構(13)に伝達するように構成し、走行用トランス
ミジョン(9)に前記ミッションケース(8)から前向
きに突出する状態で備えである前輪用出力軸(14)を
回転軸(15)を介して、前記前輪用伝動ケース(5)
に後向きに突出す条状前で、かつ、前記前輪用出力軸(
14)より低レベルに位置する状態で備えである入力軸
(16)に連動連結すると共に、この入力軸(16)の
回動力を、第2図に示す如く前記前輪用伝動ケース(5
)に内装してある減速ベヘルギア(17)及び前輪変速
装置(18)を介して前輪用差動機構(19)に伝達す
るように構成してある。
Front wheels (1a), (1b) and rear wheels (2a),
(2b), a driving transmission case (9) is installed inside the transmission case (8) forming the rear part of the aircraft, and the output of the engine (10) is transferred to the clutch (11) and the rotating shaft. (12) to the driving transmission (9), and the rotational output of the driving transmission (9) is transmitted to the internal rear wheel differential mechanism (13) to the transmission case (8). ), and a front wheel output shaft (14), which is provided in a state projecting forward from the transmission case (8), is connected to the driving transmission (9) via a rotating shaft (15). The front wheel transmission case (5)
and the output shaft for the front wheels (
14) It is interlocked and connected to the input shaft (16) which is located at a lower level, and the rotational force of this input shaft (16) is transmitted to the front wheel transmission case (5) as shown in FIG.
) is configured to be transmitted to a front wheel differential mechanism (19) via a reduction beher gear (17) and a front wheel transmission (18) installed inside the vehicle.

前記前輪変速装置(18)は第2図に示すように構成し
てある。
The front wheel transmission (18) is constructed as shown in FIG.

すなわち、前記減速ベベルギア(17)に連動させた入
力筒軸(20)に標準伝動ギア(21)を一体回転可能
に取付け、この標準伝動ギアー(21)に第1ギア(2
2)、ギア支軸(23)及び第2ギア(24)を介して
増速連動させた増速伝動ギア(25)を、前記前輪用差
動機構(19)のデファシャルギアケース(19a)に
連設してある出力筒軸(26)に相対回転可能に取付け
、そして、出力筒軸(26)に筒体(27a)を介して
一体回転するように、かつ、摺動するように取付けた伝
動部材(27)と前記標準伝動ギア(21)の間に咬合
いクラッチ(28)を設けると共に、出力筒軸(26)
と前記増速伝動ギア(25)の間に多板式摩擦クラッチ
(29)を設けである。そして、前記伝動部材(27)
が揺動シフター(30)を介して連動させである第4図
に示す如きブツシュロッド型の操作部(31)により摺
動操作されるに伴い前記クラッチ(28)及び(29)
が入り切りするように構成すると共に、前記咬合いクラ
ッチ(28)が入りで前記摩擦クラッチ(29)が切り
になるように伝動部材(27)及び操作部(31)をス
プリング(32)によって付勢してある。
That is, a standard transmission gear (21) is rotatably attached to the input cylinder shaft (20) linked to the reduction bevel gear (17), and the first gear (2) is connected to the standard transmission gear (21).
2), the speed-increasing transmission gear (25) linked to speed-increasing via the gear support shaft (23) and the second gear (24) is connected to the differential gear case (19a) of the front wheel differential mechanism (19). It is attached to the output cylinder shaft (26) connected to the output cylinder shaft (26) so as to be relatively rotatable, and is attached to the output cylinder shaft (26) through the cylinder body (27a) so as to rotate integrally and to slide. A dog clutch (28) is provided between the transmission member (27) and the standard transmission gear (21), and the output cylinder shaft (26)
A multi-disc friction clutch (29) is provided between the speed increasing transmission gear (25) and the speed increasing transmission gear (25). and the transmission member (27)
The clutches (28) and (29) are slidably operated by a bush rod-type operating section (31) as shown in FIG.
The transmission member (27) and the operating portion (31) are biased by a spring (32) so that the biting clutch (28) is engaged and the friction clutch (29) is disengaged. It has been done.

さらに詳述すると、操作部(31)が機体側ケース部分
(5a)からの突出長さが長くなる第1操作位置(S)
に操作されると、摩擦クラッチ(29)が切りで咬合い
クラッチ(28)が入りになって標準伝動ギア(21)
の回動力が伝動部材(27)を介して出力筒軸(26)
に伝達され、左右前輪(1a) 、 (1b)の平均周
速度と左右後輪(2a) 、 (2b)の平均周速度と
が同一またはほぼ同一になるように前輪用差動機構(1
3)に伝動する標準伝動状態になり、そして、操作部(
31)が機体側ケース部分(5a)からの突出長さが短
かくなる第2操作位置(H)に操作されると、咬合いク
ラッチ(28)が切りで、摩擦クラッチ(29)が入り
になって増速伝動ギア(25)の回動力が出力筒軸(2
6)に伝達され、左右前輪(1a) 、 (1b)の平
均周速度が左右後輪(2a) 。
To explain in more detail, the first operation position (S) where the operation part (31) protrudes from the fuselage side case part (5a) becomes longer.
When operated, the friction clutch (29) is disengaged, the dog clutch (28) is engaged, and the standard transmission gear (21) is engaged.
The rotational force is transmitted to the output cylinder shaft (26) via the transmission member (27).
The front wheel differential mechanism (1
3), the standard transmission state is reached, and the operation section (
31) is operated to the second operation position (H) where the protruding length from the fuselage side case part (5a) is shortened, the dog clutch (28) is disengaged and the friction clutch (29) is engaged. As a result, the rotational force of the speed-increasing transmission gear (25) is transferred to the output cylinder shaft (2
6), and the average peripheral speed of the left and right front wheels (1a) and (1b) is transmitted to the left and right rear wheels (2a).

(2b)の平均周速度より大になるように前輪用差動機
構(19)に伝動する増速伝動状態になるようにしてあ
る。そして、前記入力軸(16)より伝動下手側に位置
するように、かつ、前記標準伝動状態に復元付勢されて
いるようにしてある。
The speed-up transmission state is such that the speed is transmitted to the front wheel differential mechanism (19) so that the speed is higher than the average circumferential speed shown in (2b). It is located on the lower side of transmission than the input shaft (16) and is biased to return to the standard transmission state.

第3図に示すように、前記操作部(31)の操作のため
の回転カム(33)を一方の前記車輪側ケース部分(5
b)に備えである。そして、前記回転カム(33)は、
機体側ケース部分(5a)に対して車輪側ケース部分(
5b)と一体に前記軸芯(P2)の周りで回動し、直進
用位置から左向き側及び右向き側への操向角が設定値未
満にあるところの操向状態に前車輪(1a) 、 (1
b)がある時には、第1周面カム部(33a)が操作部
(31)に対向してこれを前記第1操作位置(S)に維
持操作するように、かつ、左向き側及び右向き側への操
向角が前記設定値以上になる操向状態に前車輪(1a)
及び(1b)が操向操作された時には、第2カム部(3
3b)または第3周面カム部(33c)をして操作部(
31)を前記第2操作位置(I()に押圧操作するよう
に構成してある。つまり、前車輪(1a) 、 (1b
)が設定角未満の操向状態にあると前輪変速装置(18
)が標準伝動状態にあり、前車輪(1a) 、 (1b
)を設定角以上に操向操作することにより前輪変速装置
(18)を増速伝動状態に切換え操作できるようにして
ある。
As shown in FIG.
In preparation for b). The rotating cam (33) is
The wheel side case part (
The front wheel (1a) rotates around the axis (P2) integrally with the front wheel (1a), and enters a steering state in which the steering angle from the straight-ahead position to the leftward side and the rightward side is less than a set value. (1
b), the first circumferential cam part (33a) faces the operating part (31) and operates to maintain it in the first operating position (S), and also to the leftward side and the rightward side. When the front wheels (1a) are in a steering state in which the steering angle is equal to or greater than the set value,
and (1b) is steered, the second cam part (3
3b) or the third circumferential cam part (33c) and the operation part (
31) to the second operation position (I(). In other words, the front wheels (1a) and (1b
) is in a steering state below the set angle, the front wheel transmission (18
) is in the standard transmission state, and the front wheels (1a) and (1b
) to a set angle or more, the front wheel transmission (18) can be switched to an increased speed transmission state.

尚、本発明は特許請求の範囲の項に図面との対照を便利
にするために符号を記すが、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, in the present invention, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by such markings.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明に係る農用トラクターの走行用伝動構造の
実施例を示し、第1図は農用トラクタ全体の一部切欠き
側面図、第2図は前輪用伝動ケースの一部展開の断面図
、第3図は前輪変速装置操作部の一部切欠き平面図、第
4は前輪変速装置操作部の一部切欠き後面図である。 (1a) 、 (1b) −・・・前車軸、(2a) 
、 (2b) = ・・・後車輪、(5)・・・・・・
前輪用伝動ケース、(9)・・・・・・走行用トランス
ミッション、(14)・・・・・・前輪用出力軸、(1
6)・・・・・・入力軸、(18)・・・・・・前輪変
速装置。
The drawings show an embodiment of the driving transmission structure for an agricultural tractor according to the present invention, in which Fig. 1 is a partially cutaway side view of the entire agricultural tractor, Fig. 2 is a partially developed sectional view of the front wheel transmission case, FIG. 3 is a partially cutaway plan view of the front wheel transmission operating section, and FIG. 4 is a partially cutaway rear view of the front wheel transmission operating section. (1a), (1b) ---Front axle, (2a)
, (2b) = ...rear wheel, (5)...
Transmission case for front wheels, (9)...Transmission for driving, (14)...Output shaft for front wheels, (1
6)...Input shaft, (18)...Front wheel transmission.

Claims (1)

【特許請求の範囲】[Claims]  走行用トランスミッション(9)を機体後部に配置し
、左右一対の前車輪(1a)、(1b)が走行自在に取
付けられた前輪用伝動ケース(6)を入力軸(16)が
前記走行用トランスミッション(9)の前輪用出力軸(
14)より低いレベルに位置する状態で設け、一対の前
記前車輪(1a)、(1b)の平均周速度と左右一対の
後車輪(2a)、(2b)の平均周速度とを同一または
ほぼ同一にする標準伝動状態と、一対の前記前車輪(1
a)、(1b)の平均周速度を一対の前記後車輪(2a
)、(2b)の平均周速度より大にする増速伝動状態と
に切換え自在な前輪変速装置(18)を設けた農用トラ
クターの走行用伝動構造であって、前記前輪変速装置(
18)を前記入力軸(16)より伝動下手側に位置させ
て前記前輪用伝動ケース(5)に内装してある農用トラ
クターの走行用伝動構造。
A driving transmission (9) is arranged at the rear of the aircraft, and a front wheel transmission case (6) to which a pair of left and right front wheels (1a) and (1b) are mounted so as to be freely travelable is attached to the input shaft (16). (9) Front wheel output shaft (
14) The average circumferential speed of the pair of front wheels (1a), (1b) and the average circumferential speed of the pair of left and right rear wheels (2a), (2b) are set at a lower level, and the average circumferential speed of the pair of front wheels (1a), (1b) is the same or approximately The standard transmission state is the same, and the pair of front wheels (1
The average circumferential speed of a) and (1b) of the pair of rear wheels (2a
), (2b) A driving transmission structure for an agricultural tractor, which is provided with a front wheel transmission (18) that can be freely switched to an increased speed transmission state in which the speed is higher than the average circumferential speed of (2b),
18) is located on the lower transmission side of the input shaft (16) and is installed inside the front wheel transmission case (5).
JP23664386A 1986-10-03 1986-10-03 Running transmission structure for farm tractor Granted JPS6390437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23664386A JPS6390437A (en) 1986-10-03 1986-10-03 Running transmission structure for farm tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23664386A JPS6390437A (en) 1986-10-03 1986-10-03 Running transmission structure for farm tractor

Publications (2)

Publication Number Publication Date
JPS6390437A true JPS6390437A (en) 1988-04-21
JPH0422738B2 JPH0422738B2 (en) 1992-04-20

Family

ID=17003661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23664386A Granted JPS6390437A (en) 1986-10-03 1986-10-03 Running transmission structure for farm tractor

Country Status (1)

Country Link
JP (1) JPS6390437A (en)

Also Published As

Publication number Publication date
JPH0422738B2 (en) 1992-04-20

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