JPS6390435A - Running transmission structure for farm tractor - Google Patents
Running transmission structure for farm tractorInfo
- Publication number
- JPS6390435A JPS6390435A JP23478786A JP23478786A JPS6390435A JP S6390435 A JPS6390435 A JP S6390435A JP 23478786 A JP23478786 A JP 23478786A JP 23478786 A JP23478786 A JP 23478786A JP S6390435 A JPS6390435 A JP S6390435A
- Authority
- JP
- Japan
- Prior art keywords
- front wheel
- transmission
- wheel transmission
- front wheels
- 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
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 97
- 230000007246 mechanism Effects 0.000 abstract description 10
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
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、左右一対の操向自在な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 which is disposed at the rear of the aircraft body, and which detects the average circumferential speed of a pair of left and right steerable front wheels and the average circumferential speed of a pair of left and right rear wheels. A front wheel transmission device that can freely switch between a standard transmission state in which the speeds are the same or almost the same, and 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. The present invention relates to a running power transmission structure for an agricultural tractor.
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、例えば特開昭5
3−119530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. 3-119530, a front wheel transmission was attached to a traveling transmission located at the rear of the fuselage.
農用トラクターにあってはロータ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、またこの作業
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 types of work equipment such as rotary tillers are often connected to the rear of the machine, and when this work equipment is connected, the weight of the work equipment applied to the rear of the machine causes the load on the front wheels to be reduced when the work equipment 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
、さらには、前輪変速装置の切換えが操作簡単にできる
ものを構造簡単に得られ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 while keeping the weights as light as possible, even when it is necessary to install balance weights, and to enable switching of the front wheel transmission. The aim is to make it easy to obtain a structure that is easy to operate.
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前車輪が付
設された前輪用伝動ケースに付設し、前記前車輪が設定
角未満の操向状態にあると前記前輪変速装置が前記標準
伝動状態に操作され、かつ、前記前車輪が前記設定角以
上に操向されると前記前輪変速装置が前記増速伝動状態
に自動的に切換え操作されるように前記前輪変速装置の
操作部を前記前車輪のナックルアームまたはタイロッド
に連動させてあることにあり、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 device is attached to a front wheel transmission case to which the front wheels are attached, and the front wheels are in a steering state less than a set angle. If so, the front wheel transmission is operated to the standard transmission state, and when the front wheels are steered beyond the set angle, the front wheel transmission is automatically switched to the increased speed transmission state. The operation part of the front wheel transmission is linked to the knuckle arm or tie rod of the front wheel, and its functions and effects are as follows.
前輪変速装置を前輪用伝動ケースに付設することにより
、前輪用伝動ケースの位置する箇所の関係から前輪変速
装置をこれの重量が前輪側に従来より多く掛かるように
しながら備えさせられる。By attaching the front wheel transmission to the front wheel transmission case, the front wheel transmission can be provided with more weight being applied to the front wheels than before due to the location of the front wheel transmission case.
ナックルアームまたはタイロッドと操作部との連動のた
めに、前車輪を操向操作するためのステアリングハンド
ル操作をするだけで前輪変速装置が切換ねるのであり、
かつ、ナックルアームやタイロッドよりも車輪用伝動ケ
ースから離れた箇所に在るピットマンアームに連動させ
るに比して連動用距離の面から小型の連動機構を付加す
るだけで、前輪変速装置の操作部をステアリングハンド
ルに連動させることができる。Due to the linkage between the knuckle arm or tie rod and the operating section, the front wheel transmission can be switched simply by operating the steering wheel to steer the front wheels.
In addition, compared to linking the knuckle arm or tie rod to the pitman arm, which is located further from the wheel transmission case, the operation section of the front wheel transmission can be easily adjusted by simply adding a smaller interlocking mechanism in terms of the interlocking distance. can be linked to the steering wheel.
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もので済ませ
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 can now be lighter than before, making it easier to attach and detach the balance weight that is required when connecting and separating work equipment. .
その上、前輪変速装置の切換えが前車輪の操向操作でも
って一挙にできることから、前輪変速が機体操向操作を
するだけで楽にできることを可能にしながらも、そのた
めに付加する必要のある連動機構を比較的小型なもので
済ませられることから構造の簡略化が可能になり、経済
面で有利にできた。Furthermore, since switching of the front wheel transmission can be done all at once by steering the front wheels, it is possible to easily change the front wheel transmission by simply controlling the direction of the aircraft, but this requires an additional interlocking mechanism. Since the structure can be made relatively small, the structure can be simplified, which is economically advantageous.
第5図に示すように、左右一対の前車輪(1a) 。 As shown in FIG. 5, 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、ロークリ耕耘装置等の
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である。(1b) so that it can be steered and driven, and a pair of left and right non-steering type rear wheels (2a) and (2b) that can be driven. Lift arm (
3), and a power take-off shaft (4
) 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
られた前輪用伝動ケース(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
しである。前記前輪用伝動ケース(5)は第1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(p
g)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
) 、 (1b)が操向操作されるように構成しである
。The pair of front wheels (1a), (1b) are connected to the fuselage frame (1a), (1b) via front wheel transmission cases (5) which are separately attached to both ends.
6) is installed. And the front wheel transmission case (
5) is the longitudinal axis of the aircraft (P,
) is connected to the fuselage frame (6) so that it can swing around the pair of front wheels (
1a) and (1b) are configured to move up and down against the aircraft body in order to swing the front wheel transmission case (5) relative to the aircraft body, and maintain the aircraft horizontally or in a posture close to this when viewed in the longitudinal direction. It is. As shown in FIG. 1, the front wheel transmission case (5) has a fuselage side case part (5a) and a fuselage vertical axis (p) at both ends of the fuselage side case part (5a).
It consists of a pair of wheel-side case parts (5b), (5b) connected to swing around the wheel-side case part (5b), which is connected to the shaft center (5b) by a knuckle arm (7). P2) is operated to swing around the front wheel (1a
) and (1b) are configured to be steered.
前車輪(1a) 、 (1b)及び後車輪(2a) 、
(2b)の駆動を可能にするに、機体後部を形成しで
あるミッションケース(8)に走行用トランスミッショ
ン(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、走行用トランスミッシ
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)の後
向きに突出する入力軸(16)に連動連結すると共に、
この人ノJ軸(16)の回動力を、第1図に示す如く前
記前輪用伝動ケース(5)の内部に取付けである減速ベ
ベルギア(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である。Front wheels (1a), (1b) and rear wheels (2a),
(2b), a driving transmission (9) is installed inside the transmission case (8) which forms the rear part of the fuselage, and the output of the engine (10) is transferred to the clutch (11) and the rotating shaft (2b). 12) configured to transmit the information to the driving transmission (9) via the
Then, the rotational output of the driving transmission (9) is transmitted to the transmission case (8) through the internal rear wheel differential mechanism (
13), and is provided with a front wheel output shaft (14) that protrudes forward from the transmission case (8) to the driving transmission (9) via a rotating shaft (15). Interlockingly connected to the rearwardly projecting input shaft (16) of the front wheel transmission case (5),
As shown in Fig. 1, the rotational force of the J-axis (16) is transmitted to the front wheels via a reduction bevel gear (17) and a front wheel transmission (18) installed inside the front wheel transmission case (5). The signal is configured to be transmitted to the differential mechanism (19).
前記前輪変速装置(18)は第1図に示すように構成し
である。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(21)に第1ギア(22
)、ギア支軸(23)及び第2ギア(24)を介して増
速連動させた増速連動ギア(25)を、前記前輪用差動
機構(19)のデファレンシャルギアケース(19a)
に連設しである出力筒軸(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、前記出力筒軸(
26)と前記増速連動ギア(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)が摺動シフター(30)及びスプリング(43)
を介して連動させてある第3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
て付勢しである。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 (22) is connected to the standard transmission gear (21).
), the speed-increasing gear (25) interlocked with the speed-increasing gear 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) which is 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 (
A multi-disc friction clutch (29) is provided between the speed-increasing interlocking gear (26) and the speed-increasing interlocking gear (25). Then, the transmission member (
27) is the sliding shifter (30) and spring (43)
The clutches (28) and (29) are constructed so as to be turned on and off as they are slidably operated by a bush rod-type operating portion (31) as shown in FIG. The transmission member (
27) and the operating section (31) are urged by a spring (32).
さらに詳述すると、操作部(31)が第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(
13)に伝動する標準伝動状態になり、そして、操作部
(31)が第2操作位置(旧に操作されると、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)の回動力が出力筒袖(26
)に伝達され、左右前輪(1a)。To explain in more detail, the operation section (31) is located at the first operation position (S
), the friction clutch (29) is disengaged, the dog clutch (28) is engaged, and the standard transmission gear (21) is operated.
) is transmitted to the output cylinder shaft (26) via the transmission member (27).
), and the front wheel differential mechanism (
13), and when the operation part (31) is operated to the second operation position (old), the dog clutch (28) is disengaged and the friction clutch (29) is engaged. The rotational force of the speed-increasing transmission gear (25) is transferred to the output sleeve (26).
) to the left and right front wheels (1a).
(1b)の平均周速度が左右後輪(2a) 、 <2b
)の平均周速度より大になるように前輪用差動機構(1
9)に伝動する増速伝動状態になるようにしである。The average circumferential speed of (1b) is the left and right rear wheels (2a), <2b
) so that the front wheel differential mechanism (1
9) is set to an increased speed transmission state.
そして、前記標準伝動状態に復元付勢されているように
しである。Then, the power is restored to the standard transmission state.
第2図及び第3図に示すように、前記操作部(31)を
回転カム(44)、カム支軸(45)、このカム支軸(
45)の機体側ケース部分(5a)からの突出部に一体
回転可能に取付けた揺動アーム(46)、押引き杆(4
7)、及び、一方のナックルアーム(7)に一体揺動可
能に取付けた揺動アーム(48)を介してナックルアー
ム(7)に連動させてある。そして、直進用位置(N)
から左側向き及び右側向きの操向角が設定角(A)より
小にある操向状態に前車輪(1a) 、 (1b)があ
る時には、回転カム(44)の第4図に示す如き第1カ
ム部(44a)が操作部(31)のローラ(31a)に
対向して操作部(31)が前記スプリング(43)によ
り前記第1操作位置(S)に操作されることを許容する
ように、かつ、直進用位置(N)から左側向きの操向角
が前記設定角(^)以上になる操向状態に前車輪(1a
) 、 (1b)が操向操作された時には、回転カム(
44)が第2カム部(44b)または第3カム部(44
c)をして操作部(31)を前記第2操作部(11)に
操作するように構成しである。つまり、前車輪(1a)
、 (1b)が前記設定角(A)未満の操向状態にあ
ると前輪変速装置(18)が前記標準伝動状態にあり、
前車輪(1a) 、 (1b)が前記設定角(A)以上
に操向されると前輪変速装置(18)が前記増速伝動状
態に自動的に切換わるように構成して、前車輪(1a)
、 (1b)の操向操作でもって前輪変速装置(18
)の切換えができるようにしである。As shown in FIGS. 2 and 3, the operating portion (31) is connected to a rotating cam (44), a cam support shaft (45),
The swing arm (46) and the push/pull rod (45) are integrally rotatably attached to the protrusion from the fuselage side case part (5a).
7), and is interlocked with the knuckle arm (7) via a swing arm (48) attached to one knuckle arm (7) so as to be able to swing integrally therewith. And the position for going straight (N)
When the front wheels (1a) and (1b) are in a steering state in which the leftward and rightward steering angles are smaller than the set angle (A), the rotating cam (44) rotates as shown in FIG. 1 cam portion (44a) faces the roller (31a) of the operating portion (31) to allow the operating portion (31) to be operated to the first operating position (S) by the spring (43). and the front wheels (1a
), (1b) is steered, the rotating cam (
44) is the second cam part (44b) or the third cam part (44
c) to operate the operating section (31) to the second operating section (11). In other words, the front wheel (1a)
, (1b) is in a steering state less than the set angle (A), the front wheel transmission (18) is in the standard transmission state,
When the front wheels (1a), (1b) are steered beyond the set angle (A), the front wheel transmission (18) is configured to automatically switch to the speed increasing transmission state, 1a)
, (1b), the front wheel transmission (18
) can be switched.
尚、第3図に示すシフター(49)は、前記回転カム(
44)をローラー(31a)に対する下降作用位置と上
昇非作用位置とにカム支軸(45)に対して摺動操作し
、操作部(31)とナックルアーム(7)を連動状態と
非連動状態とに切換えるためのものである。Note that the shifter (49) shown in FIG.
44) is slid on the cam support shaft (45) between a lowering action position and a raising non-action position relative to the roller (31a), and the operation part (31) and knuckle arm (7) are brought into an interlocking state and a non-interlocking state. This is for switching between.
第6図は前輪変速装置(18)の別実施例であり、走行
用トランスミッション(9)からの回動力をそのままの
回転速度で、あるいは、増速しで前輪用伝動ケース(5
)の入力軸(16)に伝達するように、かつ、前輪用伝
動ケース(5)の外部に位置するように配置して前輪用
伝動ケース(5)の機体側ケース部分(5a)に付設し
である。そして、入力軸(34)と出力筒軸(35)の
間に遊星歯車式の増速伝動機構(36)を設けると共に
、この増速伝動機構(36)の遊星ギア支持部材(37
)の筒部(37a)にスプライン係合によって一体回転
するように、かつ、摺動するように取付けであるクラッ
チ部材(3日)が入力軸(34)に回転体(39)をし
て備えさせてある爪部(40)に係合されると、入力軸
(34)と遊星ギア支持部材(37)とが一体回転する
ように連動連結され、入力軸(34)の回動力をそのま
まの回転速度で出力筒軸(35)に伝達するように標準
伝動状態になり、クラッチ部材(38)が変速装置ケー
ス(41)に固定しであるストッパー(42)に係合さ
れると、遊星ギア支持部材(37)が回転しないように
固定され、入力軸(34)の回動力を増速して出力筒軸
(35)に伝達するように増速伝動状態になるようにし
である。FIG. 6 shows another embodiment of the front wheel transmission (18), in which the rotational force from the driving transmission (9) is applied to the front wheel transmission case (5) at the same rotational speed or by increasing the speed.
) and located outside the front wheel transmission case (5) and attached to the fuselage side case portion (5a) of the front wheel transmission case (5). It is. A planetary gear speed increasing transmission mechanism (36) is provided between the input shaft (34) and the output cylinder shaft (35), and a planetary gear support member (37) of this speed increasing transmission mechanism (36) is provided.
A clutch member (3) is attached to the cylindrical portion (37a) of the input shaft (34) so as to integrally rotate and slide by spline engagement, and is provided with a rotating body (39) on the input shaft (34). When the input shaft (34) and the planetary gear support member (37) are engaged with the provided claw portion (40), the input shaft (34) and the planetary gear support member (37) are interlocked and connected so that they rotate together, and the rotational force of the input shaft (34) is transferred directly to the planetary gear support member (37). When the standard transmission state is established so that rotational speed is transmitted to the output cylinder shaft (35), and the clutch member (38) is engaged with the stopper (42) fixed to the transmission case (41), the planetary gear The support member (37) is fixed so as not to rotate, and is in an increased speed transmission state so that the rotational force of the input shaft (34) is increased in speed and transmitted to the output cylinder shaft (35).
そして、第7図に示すように前記クラッチ部材(38)
に揺動シフター(図示せず)を介して連動させた状態で
変速装置ケース(41)の外部に配置しである揺動式の
操作部(50)を、摺動杆(51)及び揺動カム(52
)を介して、左右一対のナックルアーム(7) 、 (
7)を連動連結しであるタイロッド(53)に連動させ
てある。すなわち、前車輪(1a) 。Then, as shown in FIG. 7, the clutch member (38)
A swing-type operating section (50), which is disposed outside the transmission case (41), is interlocked with a swing shifter (not shown) via a swing shifter (not shown). Cam (52
), a pair of left and right knuckle arms (7), (
7) is interlocked with a tie rod (53). That is, the front wheel (1a).
(1b)が前記設定角(A)未満の操向状態にある時に
は、タイロッド(53)がカム操作部(53a)をして
揺動カム(52)を押圧操作するにもかかわらず、揺動
カム(52)の第1カム部(52a)が摺動杆(51)
に対向しており、操作部(50)が自己復元力によって
標準伝動位置(S)に在り、そして、前車輪(1a)
、 (1b)が前記設定角(A)以上に操向操作された
時には、タイロッド(53)による揺動カム(52)の
設定角以上の揺動操作のために、揺動カム(52)が第
2カム部(52b)または第3カム部(52c)により
摺動杆(51)を押圧操作して操作部(50)を増速伝
動位置()I)に操作するように構成しである。(1b) is in a steering state below the set angle (A), even though the tie rod (53) operates the cam operating portion (53a) to press the swinging cam (52), the swinging cam (52) does not move. The first cam part (52a) of the cam (52) is the sliding rod (51)
The operation part (50) is in the standard transmission position (S) due to self-restoring force, and the front wheel (1a)
, (1b) is steered beyond the set angle (A), the swing cam (52) is operated by the tie rod (53) to swing the swing cam (52) beyond the set angle. The second cam part (52b) or the third cam part (52c) is configured to press the sliding rod (51) to operate the operating part (50) to the speed-increasing transmission position (I). .
尚、特許請求の範囲の項に図面との対照を便利にする為
に符号を記すが、該記入により本発明は添付図面の構造
に限定されるものではない。Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.
図面は本発明に係る農用トラクターの走行用伝動構造の
実施例を示し、第1図は前輪用伝動ケースの一部展開断
面図、第2図は前輪変速装置とナックルアームの連動部
の平面図、第3図は前輪変速装置操作部の断面図、第4
図は回転カムの平面図、第5図は農用トラクタ全体の一
部切欠き側面図、第6図は別実施前輪変速装置の断面図
、第7図は前輪変速装置の操作部の平面図である。
(1a) 、 (1b) ・・・−前車輪、(2a)
、 (2b) ・・・・・・後車輪、(5)・・・・・
・前輪用伝動ケース、(7)・・・・・・ナックルアー
4、(9)・・・・・・走行用トランスミッション、(
18)・・・・・・前輪変速装置、(31) 、 (5
0)・・・・・・操作部、(53)・・・・・・タイロ
ッド、(A)・・・・・・設定角。The drawings show an embodiment of the transmission structure for running an agricultural tractor according to the present invention, in which FIG. 1 is a partially expanded cross-sectional view of the front wheel transmission case, and FIG. 2 is a plan view of the interlocking part between the front wheel transmission and the knuckle arm. , Figure 3 is a sectional view of the front wheel transmission operating section, Figure 4 is
The figure is a plan view of the rotary cam, Figure 5 is a partially cutaway side view of the entire agricultural tractor, Figure 6 is a sectional view of a front wheel transmission implemented separately, and Figure 7 is a plan view of the operating section of the front wheel transmission. be. (1a), (1b) ...-front wheel, (2a)
, (2b) ... Rear wheel, (5) ...
・Transmission case for front wheels, (7)...Knuck lure 4, (9)...Transmission for driving, (
18)...Front wheel transmission, (31), (5
0)......Operation unit, (53)...Tie rod, (A)...Setting angle.
Claims (1)
、左右一対の操向自在な前車輪(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(1a)、(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(1
8)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)を前記前車輪(1a)、(
1b)が付設された前輪用伝動ケース(5)に付設し、
前記前車輪(1a)、(1b)が設定角(A)未満の操
向状態にあると前記前輪変速装置(18)が前記標準伝
動状態に操作され、かつ、前記前車輪(1a)、(1b
)が前記設定角(A)以上に操向されると前記前輪変速
装置(18)が前記増速伝動状態に自動的に切換え操作
されるように前記前輪変速装置(18)の操作部(31
または50)を前記前車輪(1a)、(1b)のナック
ルアーム(7)またはタイロッド(53)に連動させて
ある農用トラクターの走行用伝動構造。The driving transmission (9) is located at the rear of the aircraft, and the average circumferential speed of the pair of left and right steerable front wheels (1a), (1b) and the average circumferential speed of the pair of left and right rear wheels (2a), (2b) are determined. and a standard transmission condition that makes them the same or nearly the same,
A front wheel transmission ( 1
8), wherein the front wheel transmission (18) is connected to the front wheels (1a), (
1b) attached to the front wheel transmission case (5),
When the front wheels (1a), (1b) are in a steering state less than the set angle (A), the front wheel transmission (18) is operated to the standard transmission state, and the front wheels (1a), (1b) are operated to the standard transmission state. 1b
) is steered beyond the set angle (A), the front wheel transmission (18) is automatically switched to the speed-increasing transmission state.
or 50) is interlocked with the knuckle arm (7) or tie rod (53) of the front wheels (1a), (1b).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23478786A JPS6390435A (en) | 1986-10-02 | 1986-10-02 | Running transmission structure for farm tractor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23478786A JPS6390435A (en) | 1986-10-02 | 1986-10-02 | Running transmission structure for farm tractor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6390435A true JPS6390435A (en) | 1988-04-21 |
JPH0422737B2 JPH0422737B2 (en) | 1992-04-20 |
Family
ID=16976371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23478786A Granted JPS6390435A (en) | 1986-10-02 | 1986-10-02 | Running transmission structure for farm tractor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6390435A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63137034U (en) * | 1987-02-27 | 1988-09-08 |
-
1986
- 1986-10-02 JP JP23478786A patent/JPS6390435A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63137034U (en) * | 1987-02-27 | 1988-09-08 |
Also Published As
Publication number | Publication date |
---|---|
JPH0422737B2 (en) | 1992-04-20 |
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EXPY | Cancellation because of completion of term |