JPH04238738A - Power transmitting device in work vehicle - Google Patents
Power transmitting device in work vehicleInfo
- Publication number
- JPH04238738A JPH04238738A JP90491A JP90491A JPH04238738A JP H04238738 A JPH04238738 A JP H04238738A JP 90491 A JP90491 A JP 90491A JP 90491 A JP90491 A JP 90491A JP H04238738 A JPH04238738 A JP H04238738A
- Authority
- JP
- Japan
- Prior art keywords
- differential
- continuously variable
- type continuously
- variable transmission
- friction type
- 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.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims abstract description 38
- 210000001015 abdomen Anatomy 0.000 abstract description 7
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、農用トラクタや芝刈機
等の作業車における動力伝達装置に関し、詳しくは、入
力された回転動力を無段に変速するテーパコーン利用の
摩擦式無段変速機構と、この摩擦式無段変速機構の出力
の回転方向を切換可能な正逆転切換機構と、この正逆転
切換機構の出力が入力されるデフ機構とを備えた作業車
における動力伝達装置に関する。[Industrial Field of Application] The present invention relates to a power transmission device for a work vehicle such as an agricultural tractor or a lawnmower, and more specifically to a friction-type continuously variable transmission mechanism that uses a taper cone to continuously change the speed of input rotational power. The present invention relates to a power transmission device for a working vehicle, which includes a forward/reverse switching mechanism capable of switching the rotational direction of the output of the friction type continuously variable transmission mechanism, and a differential mechanism into which the output of the forward/reverse switching mechanism is input.
【０００２】0002
【従来の技術】従来、この種の作業車における動力伝達
装置としては、例えば、図５に示すように、機体後部に
備えたミッション装置５０として構成して、機体前部の
エンジンから動力伝達されて入力された摩擦式無段変速
機構５１より下方に、正逆転切換機構５２を設け、後車
輪へ動力伝達するデフ機構５３を、摩擦式無段変速機構
５１より後方で正逆転切換機構５２より上方に設けて構
成していた。2. Description of the Related Art Conventionally, as shown in FIG. 5, a power transmission device for a work vehicle of this type has conventionally been constructed as a mission device 50 provided at the rear of the vehicle to transmit power from an engine at the front of the vehicle. A forward/reverse switching mechanism 52 is provided below the friction-type continuously variable transmission mechanism 51 that receives the input, and a differential mechanism 53 for transmitting power to the rear wheels is connected to the forward/reverse switching mechanism 52 behind the friction-type continuously variable transmission mechanism 51. It was arranged above.
【０００３】0003
【発明が解決しようとする課題】しかしながら、上記従
来構造にあっては、後車輪の車軸５４位置よりも正逆転
切換機構５２が下方に突出位置しているので、機体下腹
部の対地高さが低いものとなり、畦をまたいで走行する
場合等において作物や畦等に正逆転切換機構５２部分の
ケース５５が接当する虞れが大であった。[Problems to be Solved by the Invention] However, in the conventional structure described above, since the forward/reverse switching mechanism 52 is positioned to protrude below the position of the axle 54 of the rear wheel, the height of the lower abdomen of the aircraft from the ground is reduced. As a result, there was a high risk that the case 55 of the forward/reverse switching mechanism 52 would come into contact with crops, ridges, etc. when traveling across ridges.
【０００４】機体下腹部の対地高さを高くするため、車
軸５４位置の対地高さを高くするミッション装置５０全
体を高く位置させることも考えられるが、機体重心も高
くなるので、安定性が悪くなるという欠点がある。[0004]In order to increase the height of the lower abdomen of the aircraft from the ground, it is possible to raise the height of the axle 54 from the ground and to position the entire mission device 50 higher, but this would also increase the center of gravity of the aircraft, resulting in poor stability. It has the disadvantage of becoming.
【０００５】本発明は、上記実情に鑑みてなされたもの
であって、機体重心を低く維持しながらも、機体下腹部
の対地高さを高くできる作業車における動力伝達装置の
提供を目的とする。The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a power transmission device for a working vehicle that can increase the height of the lower abdomen of the machine from the ground while keeping the center of gravity of the machine low. .
【０００６】[0006]
【課題を解決するための手段】本発明にかかる作業車に
おける動力伝達装置は、上記目的を達成するために、冒
記構造のものにおいて、前記摩擦式無段変速機構、前記
正逆転切換機構及び前記デフ機構を、前から順に水平方
向に沿うように並設してあると共に、前記デフ機構を内
装したケースにおけるデフ軸の軸受部に、機体取付用の
取付ボスを設けてあることを特徴とするものであって、
かかる特徴構成による作用・効果は次の通りである。[Means for Solving the Problems] In order to achieve the above object, a power transmission device for a working vehicle according to the present invention has the above-mentioned structure, and includes the friction type continuously variable transmission mechanism, the forward/reverse switching mechanism, and The differential mechanisms are arranged side by side in order from the front along the horizontal direction, and a mounting boss for attaching to the airframe is provided on the bearing of the differential shaft in the case in which the differential mechanisms are installed. It is something that
The functions and effects of this characteristic configuration are as follows.
【０００７】[0007]
【作用】すなわち、摩擦式無段変速機構、正逆転切換機
構及びデフ機構を、前から順に水平方向に沿うように並
設してあるから、摩擦式無段変速機構も正逆転切換機構
も車軸の対地位置とほぼ同じ高さ位置に設けられること
になり、車軸位置より下方に大きく突出するものでない
。また、デフ機構を内装したケースにおけるデフ軸つま
り車軸の軸受部に、機体取付用の取付ボスを設けてある
から、この取付ボスを介してボルト等により動力伝達構
造を取付けることができる。[Operation] In other words, the friction type continuously variable transmission mechanism, the forward/reverse switching mechanism, and the differential mechanism are arranged side by side in the horizontal direction from the front. It will be installed at approximately the same height as the ground level position of the axle, and will not protrude significantly downward from the axle position. Further, since a mounting boss for mounting the vehicle body is provided on the bearing of the differential shaft, that is, the axle in the case in which the differential mechanism is installed, the power transmission structure can be mounted with bolts or the like via the mounting boss.
【０００８】[0008]
【発明の効果】従って、摩擦式無段変速機構、正逆転切
換機構が、車軸と連結されるデフ機構と同じ高さ位置に
配備されることによって、車軸位置自体を高くしなくて
も、機体下腹部を対地的に高くできるので、機体重心を
低く維持しながらも、例えば畦とか作物とかに機体下腹
部が接当することを抑制できて、それらを傷つけたり壊
したりすることを回避できると共に、動力伝達装置の機
体への取付けは、デフケースのボス部を介してのボルト
固定で済み、特別な取付用部材は不要で簡単に行うこと
ができる。[Effects of the Invention] Therefore, by disposing the friction type continuously variable transmission mechanism and the forward/reverse switching mechanism at the same height as the differential mechanism connected to the axle, the axle itself can be easily moved. Since the lower abdomen can be raised relative to the ground, while maintaining the center of gravity of the aircraft low, it is possible to prevent the lower abdomen from coming into contact with, for example, ridges or crops, and avoid damaging or breaking them. The power transmission device can be easily attached to the fuselage by fixing bolts through the boss portion of the differential case, and no special attachment members are required.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.
【００１０】図４に、本発明にかかる作業車の一例とし
ての芝刈機を示している。この芝刈機は、前部に縦軸型
のエンジン１を備え、中央部に操縦部２を配置し、後部
に動力伝達装置Ａを固設した機体３を、一対の前車輪４
及び後車輪５で走行可能に構成すると共に、機体下腹部
にモーア６を吊設している。動力伝達装置Ａとモーア６
とはいずれもベルト伝動機構７，８によってエンジン１
の動力が入力されるように構成している。FIG. 4 shows a lawn mower as an example of a working vehicle according to the present invention. This lawn mower is equipped with a vertical shaft type engine 1 at the front, a control section 2 arranged at the center, a body 3 with a power transmission device A fixed at the rear, and a pair of front wheels 4.
The aircraft is configured to be able to run on rear wheels 5 and has a mower 6 suspended from the lower abdomen of the aircraft. Power transmission device A and mower 6
In both cases, the engine 1 is driven by the belt transmission mechanisms 7 and 8.
It is configured so that the power is input.
【００１１】図１乃至図３に示すように、動力伝達装置
Ａは、ベルト伝動機構７によってエンジン１の動力を入
力する動力入力部９、入力された動力を無段に変速する
テーパコーン１０利用の摩擦式無段変速機構１１、この
摩擦式無段変速機構１１の出力の回転方向を切換え可能
な正逆転切換機構１２、及びデフ機構１３等を備えて構
成すると共に、摩擦式無段変速機構１１、正逆転切換機
構１２、及びデフ機構１３は、１つのケース１４に内装
している。As shown in FIGS. 1 to 3, the power transmission device A includes a power input section 9 that inputs the power of the engine 1 through a belt transmission mechanism 7, and a taper cone 10 that uses a taper cone 10 to continuously change the speed of the input power. The friction type continuously variable transmission mechanism 11 is configured to include a friction type continuously variable transmission mechanism 11, a forward/reverse switching mechanism 12 capable of switching the rotational direction of the output of the friction type continuously variable transmission mechanism 11, a differential mechanism 13, etc. , the forward/reverse switching mechanism 12 , and the differential mechanism 13 are housed in one case 14 .
【００１２】動力入力部９は、入力プーリ１５を備えた
縦軸１６と、摩擦式無段変速機構１１の入力回転体１７
とをベベルギヤ機構で連動させるように構成している。The power input section 9 includes a vertical shaft 16 equipped with an input pulley 15 and an input rotating body 17 of the friction type continuously variable transmission mechanism 11.
and are configured to be interlocked by a bevel gear mechanism.
【００１３】摩擦式無段変速機構１１は、ケース１４に
回動自在に支持された主軸１８の周囲に、この主軸１８
と同心状に配設される入力回転体１７によって主軸１８
の軸心を中心として公転駆動される複数の自転可能なテ
ーパコーン１０を配備し、これらテーパコーン１０に接
触して駆動回転される出力回転体１９を主軸１８に取付
けると共に、それらテーパコーン１０にわたって接触状
態で前記軸心方向にシフト可能に変速部材２０を設けて
構成している。テーパコーン１０は、カム機構２１によ
って押圧付勢される出力回転体１９と押圧接触し、その
反力をディスク状のコーンサポート２２によって受けて
いると共に、入力回転体１７に取付けられた外枠２３と
、この外枠２３に連結された内枠２４とによってキャリ
ア２５を形成し、外枠２３と内枠２４とに架設した支軸
２６にテーパコーン１０を自転自在に支持している。The friction type continuously variable transmission mechanism 11 is arranged around a main shaft 18 rotatably supported by a case 14.
The input rotating body 17 is arranged concentrically with the main shaft 18.
A plurality of rotatable taper cones 10 are provided, which are driven to revolve around the axis of A transmission member 20 is provided to be shiftable in the axial direction. The tapered cone 10 is in pressure contact with the output rotary body 19 which is biased by the cam mechanism 21, and receives the reaction force by the disk-shaped cone support 22, and is in contact with the outer frame 23 attached to the input rotary body 17. A carrier 25 is formed by an inner frame 24 connected to the outer frame 23, and the taper cone 10 is rotatably supported on a support shaft 26 installed between the outer frame 23 and the inner frame 24.
【００１４】正逆転切換機構１２は、主軸１８と、一端
にブレーキ装置２７を備えた中間軸２８とにわたって構
成してあって、詳しくは、主軸１８の駆動ギヤ２９と中
間軸２８の従動ギヤ３０とで逆転伝動し、主軸１８の駆
動スプロケット３１と中間軸２８の従動スプロケット３
２とに張設したチェーン３３で正転伝動するように設定
してあり、シフト回転具３４の従動ギヤ３０と従動スプ
ロケット３２との択一連結によって中間軸２８の回転方
向を選択できるように構成している。The forward/reverse switching mechanism 12 is constructed over a main shaft 18 and an intermediate shaft 28 having a brake device 27 at one end. The driving sprocket 31 of the main shaft 18 and the driven sprocket 3 of the intermediate shaft 28
The intermediate shaft 28 is configured to transmit forward rotation by a chain 33 stretched between the intermediate shaft 28 and the intermediate shaft 28, and the direction of rotation of the intermediate shaft 28 can be selected by a selective connection between the driven gear 30 of the shift rotary tool 34 and the driven sprocket 32. are doing.
【００１５】デフ機構１３は、左右のデフ軸としての車
軸３５，３５をデフキャリア３６内部で嵌合すると共に
、そのデフキャリア３６をギヤ機構３７によって中間軸
２８に連動連結させて構成している。そして、ケース１
４における左側の車軸３５の軸受部３８に、図１及び図
３に示すように、このケース１４を機体３のフレーム３
９にボルト連結するための貫通孔を形成した取付ボス４
０，４０を設けている。The differential mechanism 13 is constructed by fitting axles 35, 35 as left and right differential shafts inside a differential carrier 36, and interlockingly connecting the differential carrier 36 to the intermediate shaft 28 by a gear mechanism 37. . And case 1
As shown in FIGS. 1 and 3, this case 14 is attached to the bearing part 38 of the left axle 35 in the frame 3 of the fuselage 3.
Mounting boss 4 formed with a through hole for connecting with bolt 9
0.40 is provided.
【００１６】前記出力軸１８、中間軸２８及び車軸３５
，３５は、図１に示すように、前から順に同一の水平面
上に沿って互いに平行に配置されている。従って、ケー
ス１４はその上下幅を小に構成されている。The output shaft 18, intermediate shaft 28 and axle 35
, 35 are arranged parallel to each other along the same horizontal plane in order from the front, as shown in FIG. Therefore, the case 14 is configured to have a small vertical width.
【００１７】尚、摩擦式無段変速機構１１の変速部材２
０を前後にシフト操作するための操作部４１と、正逆転
切換機構１２のシフト回転具３４をシフト操作する操作
部４２とは、図１に示すように、ケース１４の上面部に
設けており、夫々の操作部４１，４２に変速操作レバー
、前後進切換レバーを連係している。Furthermore, the speed change member 2 of the friction type continuously variable transmission mechanism 11
As shown in FIG. 1, an operating section 41 for shifting 0 back and forth and an operating section 42 for shifting the shift rotating tool 34 of the forward/reverse switching mechanism 12 are provided on the upper surface of the case 14. , a gear shift operation lever and a forward/reverse switching lever are linked to the respective operation parts 41 and 42.
【００１８】尚、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
添付図面の構成に限定されるものではない。It should be noted that although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.
【図１】動力伝達装置を示す側面図[Figure 1] Side view showing the power transmission device
【図２】動力伝達装置の入力側構造を示す展開断面図[Figure 2] Exploded cross-sectional view showing the input side structure of the power transmission device
【
図３】動力伝達装置の出力側構造を示す展開断面図[
Figure 3: Exploded sectional view showing the output side structure of the power transmission device
【図
４】芝刈機を示す全体側面図[Figure 4] Overall side view showing the lawn mower
【図５】従来構造の動力伝達装置を示す側面図[Fig. 5] Side view showing a power transmission device with a conventional structure
【符号の
説明】
１１ 摩擦式無段変速機構
１２ 正逆転切換機構
１３ デフ機構
１４ ケース
３５ デフ軸
３８ 軸受部
４０ 取付ボス[Explanation of symbols] 11 Friction type continuously variable transmission mechanism 12 Forward/reverse switching mechanism 13 Differential mechanism 14 Case 35 Differential shaft 38 Bearing portion 40 Mounting boss
Claims (1)
テーパコーン利用の摩擦式無段変速機構（１１）と、こ
の摩擦式無段変速機構（１１）の出力の回転方向を切換
可能な正逆転切換機構（１２）と、この正逆転切換機構
（１２）の出力が入力されるデフ機構（１３）とを備え
た作業車における動力伝達装置において、前記摩擦式無
段変速機構（１１）、前記正逆転切換機構（１２）及び
前記デフ機構（１３）を、前から順に水平方向に沿うよ
うに並設してあると共に、前記デフ機構（１３）を内装
したケース（１４）におけるデフ軸（３５）の軸受部（
３８）に、機体取付用の取付ボス（４０）を設けてある
ことを特徴とする作業車における動力伝達装置。Claim 1: A friction type continuously variable transmission mechanism (11) using a tapered cone that continuously changes input rotational power, and a transmission mechanism capable of changing the rotational direction of the output of this friction type continuously variable transmission mechanism (11). A power transmission device for a work vehicle comprising a reverse rotation switching mechanism (12) and a differential mechanism (13) into which the output of the forward/reverse rotation switching mechanism (12) is input, the friction type continuously variable transmission mechanism (11); The forward/reverse switching mechanism (12) and the differential mechanism (13) are arranged side by side in order from the front along the horizontal direction, and the differential shaft (14) in the case (14) in which the differential mechanism (13) is installed 35) bearing part (
38) is provided with an attachment boss (40) for attachment to the body of the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP90491A JPH04238738A (en) | 1991-01-09 | 1991-01-09 | Power transmitting device in work vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP90491A JPH04238738A (en) | 1991-01-09 | 1991-01-09 | Power transmitting device in work vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04238738A true JPH04238738A (en) | 1992-08-26 |
Family
ID=11486669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP90491A Pending JPH04238738A (en) | 1991-01-09 | 1991-01-09 | Power transmitting device in work vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04238738A (en) |
-
1991
- 1991-01-09 JP JP90491A patent/JPH04238738A/en active Pending
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