JPH02155888A - Straddling type small snowmobile - Google Patents
Straddling type small snowmobileInfo
- Publication number
- JPH02155888A JPH02155888A JP30704288A JP30704288A JPH02155888A JP H02155888 A JPH02155888 A JP H02155888A JP 30704288 A JP30704288 A JP 30704288A JP 30704288 A JP30704288 A JP 30704288A JP H02155888 A JPH02155888 A JP H02155888A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- endless belt
- vehicle body
- snow
- thick
- 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
- 239000011162 core material Substances 0.000 claims description 17
- 230000001141 propulsive effect Effects 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M27/00—Propulsion devices for sledges or the like
- B62M27/02—Propulsion devices for sledges or the like power driven
- B62M2027/021—Snow bikes resembling conventional motorcycles
Landscapes
- Handcart (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
Description
ＬＬＩ匹皿朋ユ１
本発明は、自動二輪車と同じ上部構造を有し、前部に前
輪の代りに操向スキーを装着し、後部に後輪の代りに無
限軌道式駆動装置を装着した鞍乗式の小型雪上車に関す
る。
従ＩＪＬ血
このような鞍乗式小型雪上車は従来から知られており、
例えば特開昭５８−３９５８１号公報に示され（いる不
整地走行車は、自動二輪車において前輪と代替して祇を
装着し、後輪と包持して無限軌道式駆動装置を装着する
ことにより不整地走行車として、砂地、湿地帯とりわけ
積雪上を走行するようにしである。前記無限軌道式走行
装置は、軌道輪支持フレームの前側に駆動軌道輪を、後
側に従Ｖ）軌道輪を支持して成り、該軌道輪支持フレー
ムがロッド部材を介して車体後方上部の車体フレームに
支持されるようになっている。そして前記軌道輪支持フ
レームの前端に前り斜め上方にアームが突設され、該ア
ームが自動二輪車のスイングアームの枢着部に枢着され
、駆動軌道輪がエンジンによりチェン駆動される。駆動
軌道輪と従動軌道輪との間に架渡された無端軌道帯は、
ゴム製無端ベルトの内周面に前記両軌道輪のスプロケッ
トと係合する歯形ベルトを張設固定し、外周面に等間隔
に金属性ラグを突設して形成されている。
また、実公昭４９−１０６０３号公報には、自動二輪車
の後輪とその後方に配設されたテンションローラとの間
に可撓走行ベルトを後側部に三角状空間ができるよう無
端三角状に捲線し、該可撓走行ベルトの下面を平坦状に
接地させるようにして成る雪上走行車が示されている。
ところで通常の自動二輪車の旋回は、車体を旋回側に傾
斜させて行われ、これによって軽快な旋回運動が得られ
るが、前記のような雪上車においては、タイヤの代りに
無端ベルトの平坦な面で雪面に接地し、かつ接雪圧を低
くするために該無端ベルトの巾を広くするのが普通であ
るため、上記のような車体を傾斜させての旋回運動を行
い難い。
また、旋回時に車体を傾斜させると、雪面に接している
無端ベルトの旋回外側が雪面から離れ、旋回内側の部分
だけで雪面に接するようになるので、接雪圧が高くなる
とともに、駆動力（推進力）が低下する。さらに大きな
巾を有する無端ベルトが上記のように傾斜することによ
り車体の重心位置が上下に移動するので、乗り心地が悪
くなる。
このため、無限軌道帯（無端ベルト）に対し車体を左右
に揺動せしめる揺動機構を設けた小型雪上車が特開昭５
９−１８０８３号公報および特開昭５８１３６５８１号
公報により提案されているが、このような雪上車におい
ては、複雑な揺動機構を必要とし、また旋回時に無限軌
道帯はそのｌ］方向全面に亘って雪面に接したままであ
るので旋回性能が劣るという不具合がある。
′しようと る
従って本発明は、無限軌道帯を車体とともに容易に傾斜
させることができ、しかも傾斜時におThe present invention provides a saddle that has the same superstructure as a motorcycle, has steering skis installed at the front instead of the front wheels, and a track drive system installed at the rear instead of the rear wheels. Concerning small ride-on snowmobiles. Small saddle-type snowmobiles like this have been known for a long time,
For example, as shown in Japanese Unexamined Patent Publication No. 58-39581, an off-road vehicle is equipped with a wheel in place of the front wheel of a motorcycle, and a track drive device is attached to the rear wheel. The tracked traveling device is designed to run on sandy areas, wetlands, and especially on snow covered areas as an off-road vehicle. The bearing ring support frame is supported by the vehicle body frame at the rear upper part of the vehicle body via a rod member. An arm is provided at the front end of the bearing ring support frame to project obliquely upward, and the arm is pivotally connected to a pivot portion of a swing arm of the motorcycle, and the drive bearing ring is chain-driven by the engine. The endless raceway band spanned between the driving raceway and the driven raceway is
A toothed belt that engages with the sprockets of both bearing rings is stretched and fixed on the inner circumferential surface of an endless rubber belt, and metal lugs are protruded from the outer circumferential surface at equal intervals. Furthermore, in Japanese Utility Model Publication No. 49-10603, a flexible running belt is arranged in an endless triangular shape to create a triangular space at the rear side between the rear wheel of a motorcycle and a tension roller disposed behind it. A snow vehicle is shown in which the flexible running belt is wound so that the lower surface of the flexible running belt is in contact with the ground in a flat manner. Incidentally, when a normal motorcycle turns, the body is tilted toward the turning side, which allows for a light turning motion, but in the snowmobile as mentioned above, instead of tires, a flat surface of an endless belt is used. Since the width of the endless belt is generally widened in order to make contact with the snow surface and reduce the snow contact pressure, it is difficult to perform the above-mentioned turning motion by tilting the vehicle body. In addition, when the vehicle body is tilted when turning, the outer part of the endless belt that is in contact with the snow surface moves away from the snow surface, and only the inner part of the endless belt comes into contact with the snow surface, which increases the snow contact pressure and Driving force (propulsive force) decreases. Further, when the endless belt having a large width is tilted as described above, the center of gravity of the vehicle body moves up and down, resulting in poor ride comfort. For this reason, a small snowmobile equipped with a swinging mechanism that allowed the vehicle body to swing from side to side relative to the endless track belt (endless belt) was developed in Japanese Patent Application Laid-open No. 5.
9-18083 and Japanese Patent Application Laid-Open No. 58136581, such snowmobiles require a complicated rocking mechanism, and when turning, the endless track belt extends over its entire surface in the l] direction. The problem is that the turning performance is poor because the wheels remain in contact with the snow surface. Therefore, the present invention allows the endless track belt to be easily tilted together with the vehicle body, and moreover, the track belt can be easily tilted together with the vehicle body.
【ノる無限軌道帯
の投雪面積を確保して接雪圧の増大および駆動力の減少
を少なくすることのできる鞍乗式小型雪上車を得ようと
するものである。
るた の よび
このため、本発明においては、前部に操向用スキーを、
後部に無限軌道式駆動装置を装着し、該無限軌道式駆動
装置の無端ベルトの外面に該ベルトの巾方向に延びかつ
前後方向に所定の間隔で多数配列された推進用ラグを突
設するとともに、該無端ベルトにその巾よりも小巾の芯
材を巾方向中央位置に埋設して成る鞍乗式小型雪上車に
おいて、前記無端ベルトの内面の前記推進用ラグに対応
する位置に前記芯材の上方から巾方向外側へ向って延び
る肉厚部を設け、該肉厚部の前記芯材端部より外側の部
分に欠除部を設ｉプる。
本発明によれば、無端ベルトの芯材によって補強されて
いない巾方向両側部分には、内面の推進用ラグに対応す
る位置に肉厚部が設けられているので、この両側部分に
おいても推進用ラグは充分な剛性を有し、従って積雪中
に食込んで充分な推進力を発揮できる。しかして該肉厚
部には芯材端部より外側に欠除部が設【プられているの
で、旋回に際して車体を傾斜させた時に、無端ベルトは
該欠除部を連ねる線に沿って屈曲変形することにより容
易に車体の傾斜に追従できる。そしてこのように変形し
た無端ベルトは旋回側の側部において比較的広い巾に亘
ってほぼ平坦に雪面に接するので、広い接雪面を確保で
き、しかもこの部分の推進用ラグによって充分な推進力
を発揮できる。なお、前記肉厚部は無端ベルトの内面に
おいて前後方向に延びる歯形を形成し、該無端ベルトを
駆動するスプロケット等との係合部となる。
支−隻一１
以下、本発明を図示の実施例について説明する。
第１図は本発明の一実施例に係る雪］−中の概略側面図
である。この雪上車は自動二輪′ｔ１！の車体１に、前
輪の代りに操向用スキー２を装着し、後輪の代りに無限
軌道式駆動装置３を装着したものである。
４は車体フレームで、その前端に設【プられたヘッドバ
イブ５にフロントフォーク６がハンドル７により操舵可
能に枢支され下１ノに伸びている。フ１】ントフォーク
６の下端に操向用スキー２が連結部片８を介して揺動自
在に装着され、該連結部片８の上部と操向用スキー２の
後部との間に緩衝器９が介挿されている。車体フレーム
４の上部には燃料タンク１０およびシート１１が装着さ
れ、中央部にエンジン１２が搭載されている。車体フレ
ーム４の中央下部にピボット軸１３が設[The present invention aims to provide a small straddle-type snow vehicle that can secure a snow-throwing area in the endless track belt and reduce increases in snow contact pressure and decreases in driving force. For this reason, in the present invention, steering skis are provided in the front part.
A track drive device is attached to the rear part, and a number of propulsion lugs extending in the width direction of the belt and arranged at predetermined intervals in the front and rear direction are protruded from the outer surface of the endless belt of the track drive device. , in a saddle-type small snow vehicle in which a core material having a width smaller than the width of the endless belt is embedded in the center position in the width direction, the core material is located on the inner surface of the endless belt at a position corresponding to the propulsion lug. A thick portion is provided extending outward in the width direction from above, and a cutout portion is provided in a portion of the thick portion outside the end of the core material. According to the present invention, on both sides of the endless belt in the width direction that are not reinforced by the core material, thick parts are provided at positions corresponding to the propulsion lugs on the inner surface. The lugs have sufficient rigidity so that they can dig into the snow and provide sufficient propulsion. However, since the thick part has a cutout outside the end of the core material, when the vehicle body is tilted during turning, the endless belt bends along the line connecting the cutout. By deforming, it can easily follow the inclination of the vehicle body. Since the endless belt deformed in this way is in almost flat contact with the snow surface over a relatively wide width on the side on the turning side, a wide snow contact surface can be secured, and the propulsion lugs in this part can provide sufficient propulsion. I can demonstrate my strength. The thick portion forms a tooth shape extending in the front-rear direction on the inner surface of the endless belt, and serves as an engaging portion for a sprocket or the like that drives the endless belt. Support Vessel 1 Embodiments of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a schematic side view of the snow according to an embodiment of the present invention. This snowmobile is a motorcycle 't1! This vehicle body 1 is equipped with steering skis 2 in place of the front wheels and a track drive device 3 in place of the rear wheels. Reference numeral 4 designates a vehicle body frame, and a front fork 6 is pivotally supported to a head vibe 5 installed at the front end of the vehicle frame so as to be steerable by a handlebar 7, and extends downward. [1] A steering ski 2 is swingably attached to the lower end of the fork 6 via a connecting piece 8, and a shock absorber is provided between the upper part of the connecting piece 8 and the rear part of the steering ski 2. 9 is inserted. A fuel tank 10 and a seat 11 are attached to the upper part of the vehicle body frame 4, and an engine 12 is mounted in the center. A pivot shaft 13 is provided at the lower center of the vehicle body frame 4.
【ノられており
、該ピボット軸１３にスイングアーム１４の前端が上下
に樒動可能に枢支されている。スイングアーム１４はピ
ボッ［・軸１３から後方へ延出し、該スイングアーム１
４と車体フレーム４の上部との間に緩衝器１５が設けら
れている。
スイングアーム１４の後端に前記無限軌道式駆動装置３
の駆動軌道輪１６が回転可能に軸支されているが、この
駆動軌道輪１６は、第２図から分るように、自動二輪車
の後輪からタイ１７を取外したものである。すなわち第
２図において１１は後車軸１８に取付りられた後輪のハ
ブ、１９は後輪のリム、２０はハブ１７とリム１９とを
結ぶスポークである。従ってこの駆動軌道輪１６はエン
ジン１２により、自動二輪車と同じ駆動機構を介して駆
動される。すなわちエンジン１２の出力軸に取付（プら
れたスプロケット２１（第１図）と、スイングアーム１
４土に設けられた中間軸２２に取付りられたスプロケッ
ト２３との間に掛【ノ浪された第１チ１ン２４を介して
、エンジン動力が先ず中間軸２２に伝えられ、次いで該
中間軸２２の他端にＩＧＪられたスプロケット２５と前
記ハブ１７に固定されたスプロケット２６との間に掛は
渡された第２チエン２７を介して駆動軌道輪１６に伝え
られる。
後車軸１８は左右のスイングアーム１４．１４から外側
に突出しており、該突出端部にそれぞれ左右の軌道輪支
持フレーム２８．２８の前端が枢着されている。軌道輪
支持フレーム２８は後方へ向って延出し、後端に左右の
軌道輪支持フレーム２８．２８にまたがる軸２９を介し
て左右１対の従動軌道輪３０が回転自在に枢支されてい
る。軌道輪支持フレーム２８から上方へ突設されたサブ
フレーム３１とスイングアム１４の中間部との間に緩衝
器３２が介設されている。
駆動軌道輪１６と従動軌道輪３０とに、後でさらに詳述
するゴム製等の無端ベルト３３が巻き掛けられており、
駆動軌道輪１６が回転すると無端ベルト３３は両軌道輪
１６．２９をめぐって回動するが、その下方走行部分３
３ａはほぼ水平方向に指向し、雪面上に実質的にその全
面に亘って接触して、車体を前進させる推進力を生ずる
。左右の軌道輪支持フレーム２８．２８にはさらに下方
へ突出したりプフレーム３４がそれぞれ設置ノられてお
り、左右のザブフレ一ム３４にまたがって横設された軸
３５．３５にそれぞれ１対の中間軌道輪３６が回転自在
に枢支されている。該中間軌道輪３６は前記下方走行部
分３３ａの内面を押圧しながら転動し、該下方走行部分
３３ａの外面を雪面に圧接させる。軸２９．３５の各中
央部にはそれぞれレール支持部材３１の上端部が固定さ
れ（第６図）、これらのレール支持部材３７の下端を連
結して前後方向に延びるスライドレール３８が設けられ
、無端ベル１〜３３の下方走行部分３３ａはこのスライ
ドレール３８に摺接しながら走行して、該スライドレー
ル３Ｂによっても雪面に対して押圧される。
第３図は無端ベルト３３を一箇所において巾方向に切断
し、その切断面近傍を示した斜視図である。
この無端ベルト３３はゴム質の材料から成り、連続した
帯状のベルト部３９の外面に推進用ラグ４０が一体に突
設形成されているａ推進用ラグ４０はベルト部３９の艮
手力向すなわち無端ベルト３３を無限軌道式駆動装置３
に装着した時の前後方向に沿って所定間隔で多数列設さ
れており、各推進用ラグ４０はベルト部３９の中全体に
亘って延在し、かつその外面は円弧状の横断面形状を有
している。ベルト部３９の内部には各推進用ラグ４０に
対応号−る位置にそれぞれ芯材４１が埋設されている。
４２はこの芯材４１に沿わせて配設された抗張用の＝１
−ドである。第３図において右側の切断面は無端ベルト
３３を招進用ラグ４０の中心線（推進用ラグ４０を前後
方向に２分するｒｉｍ＞に沿って切断した面を示し、左
側の切断面は推進用ラグ４０とベルト部３９との交線に
沿って切断した面を示しであるが、右側の切断面におい
て芯材４１は切断せずに露出させである。
この図から分るように、芯材４１のＩｌｌすなわノー）
無端ベルト３３の巾方向の長さは無端ベルト３３の１１
」より短かく、該芯材４１は無端ベルｉ〜３３のＩ ７
Ｊ向中央部において推進用ラグ４０の前後り向の厚さ全
体に亘って埋設され、この部分における推進用ラグ４０
を補強しているが、推進用ラグ４０の８月４１より外側
の部分は芯材４１によっては補強されていくｆい。
しかしこの部分にはベルト部３９の内面側に肉厚部４３
が設けられており、推進用ラグ４０はこの肉Ｊ’７部４
３によって充分な剛性を付与されているので、推進用ラ
グ４０の芯材４１によって補強されていない外側部分も
充分な推進力を発揮できる。肉厚部４３には芯材４１よ
り外側に欠除部４４が適宜設けられている。
なお、無端ベルト３３の中央部には、隣接する前後の肉
厚部４３．４３間の位置にそれぞれ透孔４５が設けられ
ている。そしてこれらの透孔４５．４５間の部分に該透
孔４５を利用して、第４図および第７図に示すように、
クリップ４６が固着されている。このクリップ４６は、
その左右両側縁に沿って無端ベルト３３の内面から突出
する１対の脚片４６ａと、その前後両端縁に沿って無端
ベルト３３の外面側へ突出する１対の脚片４６ｂとを備
え、脚片４６ｂ 、 ４６ｂがぞれぞれ透孔４５．４５
の端壁に沿って外側へ延出し、芯材４１を外面側から抱
え込むことにＪ：す、無端ベル］〜３３に固着されてい
る。
上記無端ベルト３３を駆動軌道輪１６と従動軌道輪３０
との間に装着するに当っては、先ず駆動軌道輪１６のリ
ム１９すなわちタイＶを取外した自動二輪車の後輪のリ
ムの両側面に車体巾方向に突出Ｊる山部片４７（第２図
）を、前記肉厚部４３の間隔にＡ（、＋； Ｌ。
い円周間隔で取付（プ、この山部片４７を前記肉厚部４
３に噛み合わさせる。すなわち隣接する肉厚部４３゜４
３間にそれぞれ歯部片４７が係合するようにして無端ベ
ルト３３をリム１９上に巻き掛りる。この歯部ＪＪ＋４
７と肉厚部４３との噛合いによって無端ベルト３３が駆
動軌道輪１６により駆動される。
このようにして駆動軌道輪１６により駆動される無端ベ
ルト３３の下方走行部分３３ａは、第４図に示すように
、中間軌道輪３６およびスライドレール３８によって内
面側から押圧されてベル１〜部３９の外面が雪面４８に
圧接し、雪中に食込ｌυだ１（１進用ラグ４０によって
推進力を生ずる。この峙前記クリップ４６の脚片４６ａ
、 ４６ａはスライドレール３８を両側から挟んで該
スライドレール３８によって案内されながら移動するの
で、無端ベルト３３が＋ｌ］方向にずれることはない。
また、スライドレール３８と無端ベルト３３との摺動に
より発生する摩擦熱は、前記透孔４５に入り込んで来る
雪によって有効に除去される。。
第４図には雪上車の直進走行時における無限軌道式駆動
装置３の断面を後方から見た状態を示しである。この状
態から例えば左へ旋回しようとする場合には、車体を左
方へ傾斜させるが、無端ベルト３３の外面が該ベルトの
巾方向に円弧状をなしているので、無限軌道式部ｖＪ装
置３は車体の傾斜に容易に追従して第５図に示すよな傾
斜状態になる。しかもこの時、無端ベルト３３の下方走
行部分３３ａの左側部分は、各肉厚部４３に前後方向に
整合させて設けられた欠除部４４．４４・・・・・・を
連ねる線に沿って容易に屈曲変形し、広い巾に亘ってほ
ぼ平坦に雪面４８に接して、広い投雪面積を確保する。
そしてこの投雪部分において、前述のように肉厚部４３
により補強された推進用ラグ４０が積雪中に食込んで大
きな推進力を生ずる。
第３図ないし第５図に示した実施例いおいては、左右の
肉厚部４３にそれぞれ２つの欠除部４４が設けられ、ま
た推進用ラグ４０の外面にも前記の屈曲変形をさらに容
易にするために切欠部４９が設けられているが、第８図
に示す実施例においては、各肉厚部４３にそれぞれ１つ
の欠除部４４を設り、切欠部４９は設けず、かつ推進用
ラグ４０の中央部に凹所５０が設けられている。この他
、本発明の範囲内で杆々の変形が可能なことは言うまで
もない。
１１夏１浬
以上の通り、本発明においては、旋回に際しく車体を傾
斜させた時、これに応じて無限軌道式駆動装置も容易に
傾斜し、従って無限軌道式駆動装置と車体との間に複雑
な揺動機構を必要としない。
そしてこのような傾斜旋回時に、無端ベルトの旋回側部
分が肉厚部に設けられた欠除部において屈曲変形して、
広い巾に亘ってほぼ平坦に雪面に接して広い投雪面積を
確保するとともに、この部分において肉厚部によって補
強され充分な剛性をイ】する推進用ラグが積雪中に食込
んで大きな推進力を発揮し、車体を傾斜させての軽快な
旋回運動を可能にする。The front end of a swing arm 14 is pivotally supported on the pivot shaft 13 so as to be able to swing up and down. The swing arm 14 extends rearward from the pivot shaft 13, and the swing arm 1
A shock absorber 15 is provided between the vehicle body frame 4 and the upper part of the vehicle body frame 4. The endless track drive device 3 is attached to the rear end of the swing arm 14.
A drive raceway 16 is rotatably supported, and as can be seen from FIG. 2, this drive raceway 16 is obtained by removing a tie 17 from the rear wheel of a motorcycle. That is, in FIG. 2, 11 is a hub of the rear wheel attached to the rear axle 18, 19 is a rim of the rear wheel, and 20 is a spoke that connects the hub 17 and the rim 19. Therefore, this drive raceway ring 16 is driven by the engine 12 via the same drive mechanism as that of a motorcycle. That is, it is attached to the output shaft of the engine 12 (the pulled sprocket 21 (Fig. 1) and the swing arm 1
4 Engine power is first transmitted to the intermediate shaft 22 through the first chain 24, which is suspended between the intermediate shaft 22 and the sprocket 23 attached to the intermediate shaft 22 installed on the ground, and then The engagement is transmitted to the drive raceway 16 via a second chain 27 extending between a sprocket 25 attached to the other end of the shaft 22 and a sprocket 26 fixed to the hub 17. The rear axle 18 projects outwardly from the left and right swing arms 14.14, and front ends of left and right bearing ring support frames 28.28 are pivotally connected to the projecting ends, respectively. The bearing ring support frame 28 extends rearward, and a pair of left and right driven bearing rings 30 are rotatably supported at the rear end via a shaft 29 spanning the left and right bearing ring support frames 28,28. A shock absorber 32 is interposed between a subframe 31 projecting upward from the bearing ring support frame 28 and an intermediate portion of the swing arm 14. An endless belt 33 made of rubber or the like, which will be described in more detail later, is wrapped around the drive bearing ring 16 and the driven bearing ring 30.
When the drive raceway ring 16 rotates, the endless belt 33 rotates around both raceways 16 and 29, and its downward running portion 3
3a is oriented in a substantially horizontal direction and comes into contact with the snow surface over substantially the entire surface thereof, thereby generating a propulsive force that moves the vehicle body forward. The left and right bearing ring support frames 28, 28 are further provided with downwardly protruding frames 34, and a pair of intermediate shafts 35, 35 are installed horizontally across the left and right bearing rings 34, respectively. A bearing ring 36 is rotatably supported. The intermediate bearing ring 36 rolls while pressing the inner surface of the lower running portion 33a, and presses the outer surface of the lower running portion 33a against the snow surface. The upper end portions of rail support members 31 are fixed to the center portions of each of the shafts 29, 35 (FIG. 6), and a slide rail 38 is provided that connects the lower ends of these rail support members 37 and extends in the front-rear direction, The downward running portions 33a of the endless bells 1 to 33 run while slidingly contacting this slide rail 38, and are also pressed against the snow surface by the slide rail 3B. FIG. 3 is a perspective view of the endless belt 33 cut at one point in the width direction and showing the vicinity of the cut surface. This endless belt 33 is made of a rubber material, and a propulsion lug 40 is integrally formed on the outer surface of a continuous band-shaped belt portion 39 to protrude. The endless belt 33 is connected to the endless track drive device 3
A large number of propulsion lugs 40 are arranged in rows at predetermined intervals along the front-rear direction when attached to the belt portion 39, and each propulsion lug 40 extends throughout the entire inside of the belt portion 39, and its outer surface has an arcuate cross-sectional shape. have. Inside the belt portion 39, core members 41 are embedded at positions corresponding to the respective propulsion lugs 40. 42 is a tensile wire =1 arranged along this core material 41.
- It is de. In FIG. 3, the cut plane on the right side shows the plane where the endless belt 33 is cut along the center line of the lug 40 (the rim that bisects the lug 40 in the front and back direction), and the cut plane on the left side shows the plane cut along the center line of the lug 40 for guiding. This figure shows a surface cut along the line of intersection between the lug 40 and the belt part 39, but the core material 41 is not cut and exposed on the right cut surface. Material 41 Illsunawa no)
The length of the endless belt 33 in the width direction is 11 of the endless belt 33.
”, the core material 41 is an endless bell I~33 I7
It is buried over the entire thickness of the propulsion lug 40 in the front and back directions in the central part in the J direction, and the propulsion lug 40 in this part
However, the portion of the propulsion lug 40 outside the lugs 41 is reinforced by the core material 41. However, in this part, there is a thick part 43 on the inner side of the belt part 39.
is provided, and the propulsion lug 40 is attached to this meat J'7 part 4
3 imparts sufficient rigidity, the outer portion of the propulsion lug 40 that is not reinforced by the core material 41 can also exert sufficient propulsive force. A cutout portion 44 is appropriately provided in the thick portion 43 on the outside of the core material 41 . In addition, in the center of the endless belt 33, through holes 45 are provided at positions between adjacent front and rear thick parts 43 and 43, respectively. Using the through holes 45 in the area between these through holes 45 and 45, as shown in FIGS. 4 and 7,
A clip 46 is fixed. This clip 46 is
A pair of leg pieces 46a protrudes from the inner surface of the endless belt 33 along both left and right edges thereof, and a pair of leg pieces 46b protrudes toward the outer surface of the endless belt 33 along both front and rear edges thereof. Pieces 46b and 46b each have through holes 45.45
It extends outward along the end wall of the bell and is fixed to the endless bell 33 so as to embrace the core material 41 from the outer surface side. The endless belt 33 is connected to the drive raceway 16 and the driven raceway 30.
When mounting the rim 19 of the drive raceway 16, that is, the tie V, on both sides of the rim of the rear wheel of the motorcycle from which the tie V has been removed, first mount pieces 47 (second ) are attached to the thick part 43 at circumferential intervals of A(, +; L).
Engage with 3. That is, the adjacent thick part 43°4
The endless belt 33 is wound around the rim 19 so that the toothed pieces 47 are engaged between the three. This tooth part JJ+4
The endless belt 33 is driven by the drive raceway 16 due to the engagement between the belt 7 and the thick wall portion 43 . As shown in FIG. 4, the downward running portion 33a of the endless belt 33 driven by the drive raceway 16 is pressed from the inner side by the intermediate raceway 36 and the slide rail 38, and the belt 1 to 39 The outer surface of the clip 46 presses against the snow surface 48 and digs into the snow, producing a propulsive force by the linear lug 40.
, 46a move while being guided by the slide rails 38, sandwiching the slide rails 38 from both sides, so that the endless belt 33 does not shift in the +l] direction. Furthermore, the frictional heat generated by the sliding movement between the slide rail 38 and the endless belt 33 is effectively removed by the snow that enters the through hole 45. . FIG. 4 shows a cross-sectional view of the track drive device 3 when the snowmobile is running straight ahead, as seen from the rear. For example, when attempting to turn to the left from this state, the vehicle body is tilted to the left, but since the outer surface of the endless belt 33 has an arc shape in the width direction of the belt, the track type section vJ device 3 easily follows the inclination of the vehicle body, resulting in a tilted state as shown in FIG. In addition, at this time, the left side portion of the downward running portion 33a of the endless belt 33 extends along a line connecting the cutout portions 44, 44, etc. provided in alignment with each thick portion 43 in the front-rear direction. It is easily bent and deformed, and is in almost flat contact with the snow surface 48 over a wide width, thereby ensuring a wide snow throwing area. In this snow-throwing part, as mentioned above, the thick part 43
The propulsion lugs 40 reinforced by this penetrate into the snow and generate a large propulsive force. In the embodiment shown in FIGS. 3 to 5, two cutout portions 44 are provided in each of the left and right thick portions 43, and the outer surface of the propulsion lug 40 is further subjected to the above-mentioned bending deformation. Although notches 49 are provided for ease of use, in the embodiment shown in FIG. A recess 50 is provided in the center of the propulsion lug 40. It goes without saying that other modifications may be made within the scope of the present invention. As described above, in the present invention, when the vehicle body is tilted during turning, the track type drive device also tilts easily accordingly, so that there is no space between the track type drive device and the vehicle body. No complicated swing mechanism is required. During such inclined turning, the turning side portion of the endless belt bends and deforms at the cutout provided in the thick wall portion.
The propulsion lugs, which are in almost flat contact with the snow surface over a wide width and ensure a wide snow throwing area, are reinforced by thick parts in this area and have sufficient rigidity. It exerts power and enables light turning movements by tilting the vehicle body.
第１図は本発明の一実施例に係る雪上車の概略側面図、
第２図は同雪上車の無限軌道式駆動装置の平面図、第３
図は無端ベル１へを一箇所において巾方向に切断し、そ
の切断面近傍を示した斜視図、第４図は第１図のＩＶ−
ＩＶ線に沿う断面図、第５図は無限軌道式駆動装置の傾
斜時の状態を示す第４図と同様な図面、第６図は第２図
の■−■線に沿う側面図、第７図は無端ベルトの部分的
縦断面図、第８図は無端ベルトの他の実施例を示す部分
的横断面図である。
１・・・車体、２・・・操向用スキー、３・・・無限軌
道式駆動装置、４・・・車体フレーム、５・・・ヘッド
パイプ、６・・・フロントフォーク、７・・・ハンドル
、８・・・連結部片、９・・・緩衝器、１０・・・燃料
タンク、１１・・・シート、１２・・・エンジン、１３
・・・ピボット軸、１４・・・スイングアム、１５・・
・緩衝器、１６・・・駆動軌道輪、１１・・・ハブ、１
８・・・後車軸、１９・・・リム、２０・・・スポーク
、２１・・・スプロケット、２２・・・中間軸、２３・
・・スプロケット、２４・・・第１チｌン、２５・・・
スプロケット、２６・・・スプロケット、２７・・・第
２ヂエン、２８・・・軌道輪支持フレーム、２９・・・
軸、３０・・・従動軌道輪、３１・・・リブフレーム、
３２・・・緩衝器、３３・・・無端ベルト、３４・・・
サブフレーム、３５・・・軸、３６・・・中間軌道輪、
３７・・・レール支持部材、３８・・・スライドレール
、３９・・・ベルト部、４０・・・推進用ラグ、４１・
・・芯材、４２・・・コード、４３・・・肉厚部、４４
・・・欠除部、４５・・・透孔、４６・・・クリップ、
４７・・・歯部片、４８・・・雪面、４９・・・切欠部
、５０・・・凹所。FIG. 1 is a schematic side view of a snowmobile according to an embodiment of the present invention;
Figure 2 is a plan view of the track drive system of the snowmobile;
The figure is a perspective view of the endless bell 1 cut in the width direction at one point, and shows the vicinity of the cut surface.
5 is a cross-sectional view taken along line IV, FIG. 5 is a drawing similar to FIG. 4 showing the state of the track drive device when it is tilted, FIG. 6 is a side view taken along line ■-■ in FIG. 2, and FIG. The figure is a partial vertical cross-sectional view of the endless belt, and FIG. 8 is a partial cross-sectional view showing another embodiment of the endless belt. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Steering ski, 3... Track drive system, 4... Vehicle body frame, 5... Head pipe, 6... Front fork, 7... Handle, 8... Connection piece, 9... Shock absorber, 10... Fuel tank, 11... Seat, 12... Engine, 13
...Pivot axis, 14...Swing arm, 15...
・Buffer, 16... Drive bearing ring, 11... Hub, 1
8... Rear axle, 19... Rim, 20... Spoke, 21... Sprocket, 22... Intermediate shaft, 23...
...Sprocket, 24...1st chil, 25...
Sprocket, 26... Sprocket, 27... Second die, 28... Raceway ring support frame, 29...
Shaft, 30... Driven ring, 31... Rib frame,
32... Buffer, 33... Endless belt, 34...
Subframe, 35... shaft, 36... intermediate bearing ring,
37...Rail support member, 38...Slide rail, 39...Belt portion, 40...Propulsion lug, 41...
... Core material, 42 ... Cord, 43 ... Thick part, 44
... missing part, 45... through hole, 46... clip,
47... Tooth piece, 48... Snow surface, 49... Notch, 50... Recess.
Claims (1)
装着し、該無限軌道式駆動装置の無端ベルトの外面に該
ベルトの巾方向に延びかつ前後方向に所定の間隔で多数
配列された推進用ラグを突設するとともに、該無端ベル
トにその巾よりも小巾の芯材を巾方向中央位置に埋設し
て成る鞍乗式小型雪上車において、前記無端ベルトの内
面の前記推進用ラグに対応する位置に前記芯材の上方か
ら巾方向外側へ向って延びる肉厚部を設け、該肉厚部の
前記芯材端部より外側の部分に欠除部を設けたことを特
徴とする鞍乗式小型雪上車。A steering ski is attached to the front and a track drive device is mounted to the rear, and a large number of skis are arranged on the outer surface of the endless belt of the track drive device, extending in the width direction of the belt and arranged at predetermined intervals in the front and back direction. In a saddle-type small snow vehicle, the propulsion lug is protruded from the inner surface of the endless belt, and a core material having a width smaller than that of the endless belt is embedded in the widthwise center position of the endless belt. A thick part extending outward in the width direction from above the core material is provided at a position corresponding to the lug, and a cutout part is provided in a portion of the thick part outside the end of the core material. A small saddle-type snowmobile.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63307042A JP2696239B2 (en) | 1988-12-06 | 1988-12-06 | Saddle-type small snowmobile |
| CA 2002997 CA2002997A1 (en) | 1988-12-06 | 1989-11-15 | Snowmobile |
| US08/024,830 US5474146A (en) | 1988-12-06 | 1993-03-01 | Snow vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63307042A JP2696239B2 (en) | 1988-12-06 | 1988-12-06 | Saddle-type small snowmobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02155888A true JPH02155888A (en) | 1990-06-14 |
| JP2696239B2 JP2696239B2 (en) | 1998-01-14 |
Family
ID=17964347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63307042A Expired - Fee Related JP2696239B2 (en) | 1988-12-06 | 1988-12-06 | Saddle-type small snowmobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2696239B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6406106B1 (en) * | 1998-11-05 | 2002-06-18 | Alvin Edward Moss | Endless drive track with moulded tread blocks and tread sections |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11814136B2 (en) | 2019-08-20 | 2023-11-14 | Polaris Industries Inc. | Snow vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5839581A (en) * | 1981-08-31 | 1983-03-08 | 川崎重工業株式会社 | Travelling car for uneven ground |
| JPS58136581A (en) * | 1982-02-08 | 1983-08-13 | ヤマハ発動機株式会社 | Snowmobile |
| JPS6388588U (en) * | 1986-11-28 | 1988-06-09 | ||
| JPS6388590U (en) * | 1986-11-28 | 1988-06-09 |
-
1988
- 1988-12-06 JP JP63307042A patent/JP2696239B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5839581A (en) * | 1981-08-31 | 1983-03-08 | 川崎重工業株式会社 | Travelling car for uneven ground |
| JPS58136581A (en) * | 1982-02-08 | 1983-08-13 | ヤマハ発動機株式会社 | Snowmobile |
| JPS6388588U (en) * | 1986-11-28 | 1988-06-09 | ||
| JPS6388590U (en) * | 1986-11-28 | 1988-06-09 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6406106B1 (en) * | 1998-11-05 | 2002-06-18 | Alvin Edward Moss | Endless drive track with moulded tread blocks and tread sections |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2696239B2 (en) | 1998-01-14 |
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| Date | Code | Title | Description |
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| LAPS | Cancellation because of no payment of annual fees |