JPS642817Y2

JPS642817Y2 -

Info

Publication number: JPS642817Y2
Application number: JP1278184U
Authority: JP
Priority date: 1984-01-31
Filing date: 1984-01-31
Publication date: 1989-01-24
Also published as: JPS60124336U

Description

【考案の詳細な説明】本考案は、車軸に対する遊星ギアー式減速伝動
機構を内装するケースを、車軸芯方向に第１分割
ケース部分と第２分割ケース部分とに分割自在に
形成した状態で設けた農用トラクターにおける車
輪用伝動部の構造に関する。[Detailed description of the invention] The present invention has a case in which a planetary gear type reduction transmission mechanism for an axle is housed, which can be freely divided into a first divided case part and a second divided case part in the direction of the axle axis. This invention relates to the structure of a wheel transmission part in an agricultural tractor.

上記農用トラクターにおいて、従来、遊星ギア
ー式減速伝動機構のリング型内歯式固定太陽ギア
ーをケースに固定するのに、実開昭57−52326号
公報に開示される手段が採用されていた。すなわ
ち、太陽ギアーを第１及び第２両分割ケース部分
によつて挾まれる状態にして一方の分割ケース部
分に他方の分割ケース部分と共締めするように構
成されていた。この固定構成にあつては、第１分
割ケース部分と太陽ギアーの間、及び、第２分割
ケース部分と太陽ギアーの間に夫々にシール構成
を設ける必要があるために、シール構造が複雑に
なると共に、シール不良が生じ易くなつていた。 In the above-mentioned agricultural tractor, the means disclosed in Japanese Utility Model Application Publication No. 57-52326 has conventionally been used to fix the ring-type internal tooth type fixed sun gear of the planetary gear type reduction transmission mechanism to the case. That is, the sun gear is sandwiched between the first and second split case parts, and is fastened to one split case part together with the other split case part. In this fixed configuration, the seal structure becomes complicated because it is necessary to provide a seal structure between the first split case part and the sun gear and between the second split case part and the sun gear. At the same time, sealing failures were more likely to occur.

本考案の目的は、太陽ギアー固定が確実にでき
るようにしながらも、両分割ケース部分間のシー
ルが構造簡単にかつ信頼性の高い状態にできるよ
うに、しかも、太陽ギアーの組込み固定及びケー
ス組立てが加工及び組付け手間の両面から容易に
できるようにすることにある。 The purpose of this invention is to make it possible to securely fix the sun gear while also making the seal between the two split case parts simple and reliable. The purpose is to make it easier in terms of both processing and assembly time.

本考案は、冒記した農用トラクターにおける車
輪用伝動部の構造において、前記各分割ケース部
分は、その開放端側の周縁部全周にわたつて、前
記分割ケース部分の開放側の端面どうしを密接さ
せる合わせ面部を形成してあると共に、前記減速
伝動機構のリング型内歯式固定太陽ギアーの回り
止め頭付きピンを、頭部が前記固定太陽ギアーと
前記第１分割ケース部分とで挾圧される状態で、
かつ、前記合わせ面部の外縁よりも半径方向内方
側位置で、前記第２分割ケース部分に車軸芯方向
に嵌着してあることを特徴とし、その作用及び効
果は次のとおりである。 In the structure of the wheel transmission part of the agricultural tractor mentioned above, the present invention provides that each of the divided case parts is arranged so that the open end surfaces of the divided case parts are brought into close contact with each other over the entire circumference of the open end side. and a mating surface portion is formed to allow the detent head pin of the ring-shaped internally toothed fixed sun gear of the reduction transmission mechanism to be held in place by the fixed sun gear and the first split case portion. In a state where
Further, it is characterized in that it is fitted in the second split case portion in the axle axis direction at a position radially inward from the outer edge of the mating surface portion, and its functions and effects are as follows.

すなわち、回り止め頭付きピンを前記挾圧状態
で第２分割ケース部分に嵌着することにより、太
陽ギアーがピン頭部を介する状態で第１分割ケー
ス部分と第２分割ケース部分とでケース部分締付
力のために挾圧されることになるので、太陽ギア
ー固定が確実にできる。それでありながら、分割
ケース部分どうしを分割ケース部分の周縁部全周
囲にわたつて設けた合わせ面部で接合させること
により、ケース分割面に対するシールが分割ケー
ス部分間にのみ旋こすだけで済む。従つて、必要
シール構成を従来より少なくでき、シール構造が
簡単になると共にシール不良が生じにくいように
なつた。その上、本考案による太陽ギアー固定構
成によれば、シールの組立て時に、太陽ギアーを
第１分割ケース部分に回り止めピンで取付けてお
いて脱落しないようにしながら両分割ケース部分
を容易に接合でき、さらには、回り止めピンが車
軸芯方向の嵌着式であるから、ネジ式のように第
２分割ケース部分にネジ切りする作業をしなくと
もピンの取付けができ、かつ、回り止めピンの第
２分割ケース部分に対する嵌着不足があつても、
分割ケース部分を締付けるだけで、この締付け力
が第１分割ケース部分を介してピン頭部に作用し
て第２分割ケース部分に十分に嵌着できる。従つ
て、ケースの組立て及び太陽ギアーの組込み固定
が容易にかつ迅速にできるようになつた。 That is, by fitting the anti-rotation head pin into the second split case part in the clamped state, the first split case part and the second split case part are connected to the case part with the sun gear passing through the pin head. The sun gear can be securely fixed because it will be clamped by the tightening force. However, by joining the split case parts together at the mating surfaces provided around the entire periphery of the split case parts, the seal for the case split surface only needs to be placed between the split case parts. Therefore, the number of required seal structures can be reduced compared to the conventional one, and the seal structure is simplified and seal defects are less likely to occur. Moreover, according to the sun gear fixing structure of the present invention, when assembling the seal, the sun gear can be attached to the first split case part with a detent pin to prevent it from falling off, and the two split case parts can be easily joined together. Furthermore, since the locking pin is fitted in the direction of the axle core, the pin can be installed without having to cut a thread into the second split case part unlike the screw type. Even if there is insufficient fitting to the second split case part,
By simply tightening the divided case portion, this tightening force acts on the pin head via the first divided case portion, allowing the pin to be sufficiently fitted into the second divided case portion. Therefore, the case can be assembled and the sun gear can be assembled and fixed easily and quickly.

以下に、本考案の実施例を図面に基いて説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.

第１図に示すように、左右一対の操向型駆動前
車輪１，１及び非操向型駆動後車輪２，２を有し
た走行機体の後部に、ロータリー耕耘装置等の各
種作業装置を昇降操作自在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を設けて、農用トラクターを構成してある。 As shown in Fig. 1, various working devices such as a rotary tiller are mounted at the rear of a traveling machine that has a pair of left and right steering type drive front wheels 1, 1 and non-steering type drive rear wheels 2, 2. An agricultural tractor is constructed by providing a lift arm 3 that is operably connected and a power take-off shaft 4 that transmits power to a connected work device.

第２図に示すように、前記左右前輪１，１を左
右端部に各別に車軸５を介して軸支させた伝動ケ
ース６を、このケース６の左右中間部に溶接した
前後一対の筒支軸７，８を介して、機体側の前後
一対のボス部９，１０に機体前後方向の軸芯P₁
周りでの上下揺動が自在に取付けて、走行地面の
左右傾斜にかかわらず機体がほぼ水平になるよう
に、左右車輪１，１を機体に対して一体的にかつ
反対方向に軸芯P₁周りで揺動昇降するように取
付けてある。 As shown in FIG. 2, a transmission case 6 in which the left and right front wheels 1, 1 are respectively pivotally supported at the left and right ends via an axle 5 is connected to a pair of front and rear cylinder supports welded to the left and right middle parts of the case 6. An axis P ₁ in the longitudinal direction of the fuselage is attached to the pair of front and rear boss portions 9 and 10 on the fuselage side via the shafts 7 and 8.
The left and right wheels 1, 1 are mounted integrally with the aircraft body and rotated in opposite directions so that they can freely swing vertically around the machine and the machine body is almost horizontal regardless of the horizontal inclination of the running ground _. It is installed so that it can swing up and down around it.

そして、左右前輪１，１の駆動を可能にする
に、前記伝動ケース６の左側端部に相当する箇所
あるいは右側端部に相当する箇所を形成してある
２個の鋳造製ケース部分１１，１１の間に位置す
るケース部分であつて、一対の前記鋳造ケース部
分１１，１１の一方から他方にわたる一連の構造
用鋼管で作製してあるケース部分１２に、差動機
構１３、及び、この差動機構１３の左右一対の出
力ギアー１３ａ，１３ｂに各別に連動させた左右
一対の横向き連動軸１４，１４の夫々を内装し、
そして、前記連動軸１４にベベルギアー機構１５
を介して減速連動させた縦向き連動軸１６、この
縦向き連動軸１６の回動力を車軸５に減速伝達す
る遊星ギアー式減速伝動機構１７の夫々を鋳造ケ
ース部分１１に内装してあり、トランスミツシヨ
ン１８の回転出力が入力軸１３ｃを介して差動機
構１３に入力され、減速されると共に左右に分岐
され、この分岐出力が車軸５に減速伝達されるよ
うに構成してある。 In order to enable the driving of the left and right front wheels 1, 1, two cast case parts 11, 11 are formed that correspond to the left end or the right end of the transmission case 6. A case part 12 located between the pair of cast case parts 11 and 11 and made of a series of structural steel pipes is provided with a differential mechanism 13 and a differential mechanism 13, A pair of left and right horizontal interlocking shafts 14, 14 respectively interlocked with a pair of left and right output gears 13a, 13b of the mechanism 13 are installed inside, respectively.
A bevel gear mechanism 15 is attached to the interlocking shaft 14.
A vertical interlocking shaft 16 that is decelerated and interlocked via a transformer, and a planetary gear type deceleration transmission mechanism 17 that decelerates and transmits the rotational force of this vertical interlocking shaft 16 to the axle 5 are installed in the cast case part 11. The rotational output of the transmission 18 is input to the differential mechanism 13 via the input shaft 13c, and is decelerated and branched left and right, and this branched output is transmitted to the axle 5 at a reduced speed.

前輪１，１の操向操作を可能にするに、鋳造ケ
ース部分１１を、前記縦向き連動軸１６を内装す
ると共に鋼管ケース部分１２のフランジ部１２ａ
に固定したケース部１９と、車軸５を備えさせる
と共に前記固定側ケース部１９に縦向き連動軸１
６と同芯の縦軸芯P₂周りで揺動自在に連結した
揺動側ケース部２０とから構成してあり、この揺
動側ケース部２０をナツクルアーム２１により揺
動操作するようにしてある。 In order to enable steering operation of the front wheels 1, 1, the cast case part 11 is equipped with the vertical interlocking shaft 16 and a flange part 12a of the steel pipe case part 12.
A case part 19 is fixed to the fixed side case part 19, and an axle 5 is provided.
6 and a swinging side case part 20 connected to the swinging side case part 20 so as to be swingable around the coaxial vertical axis _P2 , and the swinging side case part 20 is swingable by a knuckle arm 21. .

前記遊星ギアー式伝動機構１７を内装してある
揺動側ケース部２０を構成するに、機体内側の第
１分割ケース部分２０ａと、機体外側の第２分割
ケース部分２０ｂとを、これら分割ケース部分２
０ａ，２０ｂの周縁部が全周囲にわたつて互いに
車軸５の軸芯方向に接合させた状態で車軸芯方向
のボルト２２により締付け連結して成り、車軸芯
方向に２つの前記分割ケース部分２０ａ，２０ｂ
に分割できるように形成すると共に、両分割ケー
ス部分２０ａ，２０ｂどうしの合わせ面部２３
に、シール材２４を介装してある。 The swing-side case portion 20 in which the planetary gear type transmission mechanism 17 is housed is constructed by combining a first divided case portion 20a on the inside of the body and a second divided case portion 20b on the outside of the body. 2
The peripheral edges of the case parts 0a and 20b are connected to each other in the axial direction of the axle 5 over the entire circumference, and are tightened and connected by bolts 22 in the axial direction of the axle, and the two divided case parts 20a, 20b
The mating surface portion 23 between both divided case portions 20a and 20b is
A sealing material 24 is interposed therein.

前記遊星ギアー式伝動機構１７を構成するに、
車軸５の外周囲に分散配置した複数個の遊星ギア
ー２５…の夫々を支軸２６を介して回転自在に支
持させたキヤリヤ２７を、車軸５にスプライン係
合によつて一体回転するように取付け、遊星ギア
ー２５，２５の夫々に咬合させた回転太陽ギアー
２８を、車軸５に相対回転自在に取付けると共
に、受動ギアー２９、伝動ギアー３０を介して前
記縦向き連動軸１６にこれの回動力が減速伝動さ
れるように連動させ、遊星ギアー２５，２５の
夫々に咬合させたリング型の内歯式固定太陽ギア
ー３１を第３図及び第４図に示す構造により前記
ケース部２０に取付けてある。 In configuring the planetary gear type transmission mechanism 17,
A carrier 27, which rotatably supports each of a plurality of planetary gears 25 distributed around the outer periphery of the axle 5 via a support shaft 26, is attached to the axle 5 by spline engagement so as to rotate integrally therewith. A rotating sun gear 28 meshed with each of the planetary gears 25 and 25 is attached to the axle 5 so as to be relatively rotatable, and its rotational force is transmitted to the vertical interlocking shaft 16 via a passive gear 29 and a transmission gear 30. A ring-shaped internally toothed fixed sun gear 31 interlocked with the planetary gears 25 and 25 for deceleration transmission is attached to the case portion 20 with the structure shown in FIGS. 3 and 4. .

すなわち、太陽ギアー３１の外周部で周方向に
分散配置した２個所の夫々において、頭付きピン
３２を、本体が太陽ギアー３１の切欠き３１ａに
係入する状態で第２分割ケース部分２０ｂのピン
孔に車軸芯方向に挿入嵌着すると共に、前記ピン
３２の頭部３２ａを太陽ギアー３１と第１分割ケ
ース部分２０ａの段部３３とで前記連結ボルト２
２による締付け力によつて挾圧されるように構成
し、頭付きピン３２の係止作用によつて太陽ギア
ー３１の回り止めが行われるように、かつ、第１
分割ケース部分２０ａと第２分割ケース部分２０
ｂとのピン頭部３２ａを介しての挾圧によつて太
陽ギアー３１の車軸芯方向における固定が行われ
るように構成してある。 That is, at two locations distributed in the circumferential direction on the outer periphery of the sun gear 31, the headed pins 32 are inserted into the pins of the second split case portion 20b while the main body engages in the notches 31a of the sun gear 31. While inserting and fitting into the hole in the axle core direction, the head 32a of the pin 32 is connected to the connecting bolt 2 by the sun gear 31 and the stepped portion 33 of the first split case portion 20a.
2, and the sun gear 31 is prevented from rotating by the locking action of the headed pin 32.
Split case part 20a and second split case part 20
The sun gear 31 is fixed in the axle axis direction by clamping pressure between the sun gear 31 and the pin head 32a.

尚、第３図に示す３４は、前記支軸２６のキヤ
リヤ２７からの抜け出しを防止するためのピンで
ある。 Note that 34 shown in FIG. 3 is a pin for preventing the support shaft 26 from coming off from the carrier 27.

尚、実用新案登録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
本考案は添付図面の構造に限定されるものではな
い。 Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

図面は本考案に係る農用トラクターにおける車
輪用伝動部の構造の実施例を示し、第１図は農用
トラクターの側面図、第２図は前輪取付部の一部
展開状態の一部切欠き背面図、第３図は太陽ギア
ー固定部の断面図、第４図は第３図の−断面
矢視図である。５……車軸、１７……遊星ギアー式減速伝動機
構、２０……ケース、２０ａ……第１分割ケース
部分、２０ｂ……第２分割ケース部分、２３……
合わせ面部、３１……固定太陽ギアー、３２……
回り止めピン、３２ａ……ピン頭部。 The drawings show an embodiment of the structure of the wheel transmission part in an agricultural tractor according to the present invention, in which Fig. 1 is a side view of the agricultural tractor, and Fig. 2 is a partially cutaway rear view of the front wheel mounting part in a partially expanded state. , FIG. 3 is a cross-sectional view of the sun gear fixing part, and FIG. 4 is a cross-sectional view taken along the - arrow in FIG. 3. 5... Axle, 17... Planetary gear type reduction transmission mechanism, 20... Case, 20a... First split case part, 20b... Second split case part, 23...
Matching surface part, 31...Fixed sun gear, 32...
Stopping pin, 32a...Pin head.

Claims

[Scope of utility model registration request]

Planetary gear type reduction transmission mechanism 17 for the axle 5
This is a structure of a wheel transmission part in an agricultural tractor in which a case 20 housing a case 20 is formed so as to be freely divisible in the axle axis direction into a first divided case part 20a and a second divided case part 20b, The divided case portions 20a and 20b extend over the entire circumference of the open end side of the divided case portion 2.
A mating surface portion 23 is formed to bring the open side end surfaces of 0a and 20b into close contact with each other, and the ring-shaped internal tooth type fixed sun gear 3 of the reduction transmission mechanism 17 is formed.
1, with the head 32a being pressed between the fixed sun gear 31 and the first split case portion 20a, and radially inward from the outer edge of the mating surface portion 23. The structure of a wheel transmission part in an agricultural tractor that is fitted in the second split case part 20b in the direction of the axle axis at a side position.