JPH05340452A - Belt type continuously variable transmission - Google Patents

Belt type continuously variable transmission

Info

Publication number
JPH05340452A
JPH05340452A JP17492392A JP17492392A JPH05340452A JP H05340452 A JPH05340452 A JP H05340452A JP 17492392 A JP17492392 A JP 17492392A JP 17492392 A JP17492392 A JP 17492392A JP H05340452 A JPH05340452 A JP H05340452A
Authority
JP
Japan
Prior art keywords
pulley piece
shaft
continuously variable
fixed
variable transmission
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
Application number
JP17492392A
Other languages
Japanese (ja)
Inventor
Hidefumi Akao
英文 赤尾
Masayuki Tanaka
正行 田中
Katsuyuki Hioki
勝行 日置
Toshiaki Arakane
利昭 荒金
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.)
Mitsuboshi Belting Ltd
Original Assignee
Mitsuboshi Belting Ltd
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 Mitsuboshi Belting Ltd filed Critical Mitsuboshi Belting Ltd
Priority to JP17492392A priority Critical patent/JPH05340452A/en
Publication of JPH05340452A publication Critical patent/JPH05340452A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide a belt type continuously variable transmission in which incurring of a mechanical loss and smooth gear shifting operation is carried out. CONSTITUTION:A belt type continuously variable transmission having gear shifting pulleys V1 and V2 is formed such that fixed pulley pieces 3 and 17 and moving pulley pieces 4 and 18 positioned facing the respective fixed pulleys and longitudinally movable on a shaft are arranged on input and output shafts 1 and 2, respectively. In the transmission, an oiltight space part 9 is formed on the back of the moving pulley 4 disposed on the input shaft 2 by means of a fixed piece 8 fixed on a shaft in the rear of the back and inner and outer extension parts 7a and 7b both protruded from the back of the respective moving pulley pieces. A complicated radial guide groove 9a is formed in the space part, and a centrifugal force exerting material 10 movable in the guide groove is arranged in the guide groove. Further, an oil introduction hole 7c is formed in the space part and the oil introduction hole is connected to an external oil feeding means P.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、ベルト式無段変速装
置に係わり、特に自動車などの無段変速装置に使用され
るもので、即ち、推力を車体の速度と負荷条件に応じて
変化させ、所定の変速比をタイムリーに自動調節できる
上記ベルト式無段変速装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt type continuously variable transmission, and more particularly to a continuously variable transmission such as an automobile, in which the thrust is changed according to the vehicle speed and load conditions. The present invention relates to the above belt type continuously variable transmission capable of automatically adjusting a predetermined gear ratio in a timely manner.

【0002】[0002]

【従来の技術】二輪車や自動車などのベルト式無段変速
装置としては固定プーリ片と可動プーリ片が夫々平行に
配置された入力軸と出力軸に装着され、夫々のプーリ片
によって形成されるV溝にVベルトが掛架された構成か
らなり、各可動プーリ片がベルトを押圧する推力を発生
する機構としては、一般に油圧あるいはスプリング力と
ともに遠心力付与材をテーパに付いた空間部内に収設し
て軸の回転数が増えるとともに可動プーリ片に与える推
力が増すような機構が使われていた。
2. Description of the Related Art As a belt type continuously variable transmission for a motorcycle or an automobile, a fixed pulley piece and a movable pulley piece are mounted on an input shaft and an output shaft, which are arranged in parallel, respectively, and a V formed by the respective pulley pieces. A mechanism in which a V-belt is suspended in a groove, and a mechanism for generating a thrust force for pressing each belt by each movable pulley piece is generally housed in a taper space portion in which a centrifugal force imparting material is provided together with hydraulic pressure or spring force. Then, a mechanism was used in which the thrust applied to the movable pulley piece increased as the number of rotations of the shaft increased.

【0003】遠心力付与材を使用するものとしては空間
部内にボール状の遠心力付与材を一つ収設したもの、ま
た、遠心力による推力をより大きな推力とした空間部内
を自在に移動可能な多数のボールを収設したものがあ
る。これらの、無段変速装置は構造自体が簡単で推力を
与える手段も簡単な構造であることから、装置をよりコ
ンパクトに設計できるとともに、故障の心配も少ない。
また故障したとしてもその故障の原因をつかむのは簡単
で修理も容易なもので済むという利点がある。
As the centrifugal force imparting material, one ball-shaped centrifugal force imparting material is housed in the space portion, and the centrifugal force imparting force makes it possible to move freely in the space portion where the thrust force is increased. There are a large number of balls housed in it. Since these continuously variable transmissions have a simple structure and a simple means for applying a thrust, the device can be designed more compact and there is little fear of failure.
Further, even if a failure occurs, it is easy to find out the cause of the failure, and there is an advantage that it can be easily repaired.

【0004】[0004]

【発明が解決しようとする課題】しかし、上記の無段変
速装置で油圧の推力のみで可動プーリ片を動かしていた
ものは、油圧のみで所定の推力を得ようとすると、大出
力のオイルポンプを必要とするため、メカロスが大きく
なり、自動車の燃費が悪くなる。また遠心力付与材を用
いたもののうちでも遠心推力付与材が遠心推力付与材を
収容するための空間部中に1つであるものは遠心力が十
分に得られないという問題があった。そして、遠心力付
与材を収容する空間部中のほとんどに多数の遠心力付与
材を収設したものは遠心力は十分な大きさのものが得ら
れるが、軸の回転数の高い状態から低い状態へ移ったと
き多数の遠心力付与材が空間部の外周部でブリッジを形
成してしまい可動プーリ片が動けなくなってしまうとい
う問題が発生している。
However, in the continuously variable transmission in which the movable pulley piece is moved only by the thrust of the hydraulic pressure, when the predetermined thrust is obtained only by the hydraulic pressure, the oil pump of large output is used. Therefore, the mechanical loss becomes large and the fuel efficiency of the vehicle becomes poor. Further, among those using the centrifugal force imparting material, the centrifugal force imparting material having one in the space for accommodating the centrifugal force imparting material has a problem that sufficient centrifugal force cannot be obtained. When a large number of centrifugal force imparting materials are housed in most of the space for accommodating the centrifugal force imparting material, a centrifugal force having a sufficient magnitude can be obtained, but it is low due to the high rotational speed of the shaft. When the state shifts to a state, a large number of centrifugal force imparting materials form a bridge in the outer peripheral portion of the space portion, which causes a problem that the movable pulley piece becomes immobile.

【0005】そこで、本発明は上記の課題を解決しメカ
ロスが少なく故障が起こりにくく、遠心推力も十分なも
のが得られ、しかも変速動作がスムーズなベルト式無段
変速装置の提供を目的とする。
Therefore, an object of the present invention is to solve the above problems and to provide a belt type continuously variable transmission which has less mechanical loss, is less likely to cause a failure, has sufficient centrifugal thrust, and has a smooth gear shifting operation. ..

【0006】[0006]

【課題を解決するための手段】本発明は、前記のような
目的を達成するために入力軸と出力軸にそれぞれ固定プ
ーリ片と、このプーリ片に対向して軸上の長手方向に移
動可能に可動プーリ片を設け、これら両プーリ片によっ
て形成された両V状溝に動力伝動ベルトを掛架したベル
ト式無段変速装置において、前記入力軸に配設した可動
プーリ片の背部に該背部後方の軸に固着した固定片と前
記可動プーリ片の背面から突出した内外延設部によって
油密性の空間部を形成し、この空間部内に複数の放射状
のガイド溝を設け、該ガイド溝内にはガイド溝中を移動
可能な遠心力付与材を収設し、更に該空間部に油導入孔
を設け該油導入孔は外部の油送手段に接続されているこ
とを特徴とする。
According to the present invention, in order to achieve the above-mentioned object, a fixed pulley piece is provided on each of an input shaft and an output shaft, and is movable in the longitudinal direction on the shaft so as to face the pulley piece. In a belt-type continuously variable transmission in which a movable pulley piece is provided in the V-shaped groove formed by these pulley pieces and a power transmission belt is hung on the V-shaped groove, a back portion of the movable pulley piece disposed on the input shaft is provided. An oil-tight space is formed by the fixed piece fixed to the rear shaft and the inner and outer extending portions projecting from the rear surface of the movable pulley piece, and a plurality of radial guide grooves are provided in this space, and the inside of the guide groove is formed. Is accommodated with a centrifugal force imparting material that can move in the guide groove, and an oil introduction hole is further provided in the space, and the oil introduction hole is connected to an external oil feeding means.

【0007】また、油送手段が、入力軸または出力軸と
ともに回転する流体溜め部と、該流体溜め部内にその開
口部を挿入されたピトー管であることが装置のコンパク
トかにおいてより好ましい。
Further, it is more preferable that the oil feeding means is a fluid reservoir portion that rotates together with the input shaft or the output shaft and a pitot tube in which the opening portion is inserted into the fluid reservoir portion in view of compactness of the apparatus.

【0008】[0008]

【作用】本発明では、遠心力付与材によって得た遠心力
および油圧を可動プーリ片の推力として使用しており、
遠心推力と組み合わせることによって油圧の発生はより
簡単なもので済むことからメカロスの少ない装置が得ら
れ、また遠心推力付与材は空間部の中に複数収設されお
り遠心力は十分なものが得られる上に、夫々の遠心力付
与材は一つ一つが放射状のガイド溝内でしか動かず互い
が接触することがないのでブリッジを形成することもな
く、また、遠心推力付与材の収容される空間部を油密性
にして油圧シリンダーとしても使用しており、このこと
はコンパクト化につながるだけでなく、遠心力付与材の
ガイド溝内の動きを潤滑しスムーズにすることにも役立
つ。
In the present invention, the centrifugal force and hydraulic pressure obtained by the centrifugal force imparting material are used as the thrust of the movable pulley piece,
By combining this with centrifugal thrust, hydraulic pressure can be generated more easily, so a device with less mechanical loss can be obtained, and multiple centrifugal thrust imparting materials are stored in the space, so sufficient centrifugal force can be obtained. In addition, each of the centrifugal force imparting materials moves only in the radial guide groove and does not come into contact with each other, so that no bridge is formed and the centrifugal thrust imparting material is accommodated. The space is made oil-tight and is also used as a hydraulic cylinder, which not only leads to compactness, but also helps to lubricate and smooth the movement of the centrifugal force imparting material in the guide groove.

【0009】[0009]

【実施例】以下、本発明の実施例を添付図面に従って説
明する。図1は本発明に係るベルト式無段変速装置の断
面図である。入力軸1および出力軸に夫々変速プーリV
1 、V2 間にベルトB1 を巻き掛けてなる装置におい
て、特にその入力側変速プーリV1 および出力側変速プ
ーリV 2 に下記の如き各構成を有する変速プーリを配し
た点にある。入力側の変速プーリV1 においては、これ
に設けられたスプラインに固定プーリ片3が嵌入され固
着されており、他方これに対向するように可動プーリ片
4が固定プーリ片3のシーブ軸5上に設けられたスプラ
インまたはキー6に嵌入され、両プーリ片3、4に掛架
するV状溝が形成されている。
Embodiments of the present invention will be described below with reference to the accompanying drawings.
Reveal FIG. 1 is a schematic diagram of a belt-type continuously variable transmission according to the present invention.
FIG. A transmission pulley V is provided on each of the input shaft 1 and the output shaft.
1, V2Belt B between1Smell around the device
In particular, the input side speed change pulley V1And output side shift
-V 2A speed change pulley having the following configurations is installed in
There is a point. Input side speed change pulley V1In
The fixed pulley piece 3 is fitted into the spline provided on the
Is attached to the other side of the movable pulley piece
4 is a sprue provided on the sheave shaft 5 of the fixed pulley piece 3.
It is fitted into the in or key 6 and hung on both pulley pieces 3 and 4.
V-shaped groove is formed.

【0011】そして前記可動プーリ片4は固定プーリ片
3のシーブ軸5の長手方向に対して移動可能に装設され
ており、この可動プーリ片4の背部には突出した内外延
設部7a、7bが設けられ、それとともに該背部後方の
軸上には固定片8が設けられて前記内外延設部7a、7
bと該固定され固定片8によって空間部9が形成され、
該空間部9内に複数個の遠心力付与材10、たとえば鋼
球のような剛球が収設されている。この遠心力付与材1
0は図 に示すように空間部9内に放射状に複数本設け
たガイド溝9a中に収設され、該ガイド溝9a中を自由
に移動できるようになっている。また遠心力付与材の数
をできるだけ多くするために径の大きなボール10aと
小さなボール10bの二種類をガイド溝の長さを変えて
交互に設けるようにしている。
The movable pulley piece 4 is mounted so as to be movable with respect to the longitudinal direction of the sheave shaft 5 of the fixed pulley piece 3, and the inner and outer extending portions 7a projecting at the back of the movable pulley piece 4 are provided. 7b is provided, and a fixing piece 8 is also provided on the shaft at the rear of the back, and the inner and outer extending portions 7a, 7
b and the fixed fixing piece 8 form a space 9
A plurality of centrifugal force imparting materials 10, for example, hard balls such as steel balls are housed in the space 9. This centrifugal force imparting material 1
As shown in the figure, 0 is accommodated in a plurality of guide grooves 9a radially provided in the space 9 and can freely move in the guide grooves 9a. Further, in order to increase the number of centrifugal force imparting materials as much as possible, two kinds of balls 10a having a large diameter and balls 10b having a small diameter are alternately provided by changing the length of the guide groove.

【0012】更に、空間部9の固定片8の外延設部7b
との接触部にはパッキング12が取り付けられ空間部9
内は油密性が保たれており、可動プーリ片の内延設部7
aには空間部9に通ずる油導入孔7cが設けられ、油送
手段であるオイルポンプPからハウジング13の軸受け
部14に設けられた空洞部15、入力軸1内、そして固
定プーリ片3のシーブ軸5に設けた流体通路16を通っ
た油が前記油導入孔7cを通って油圧シリンダーとなる
空間部9内に取り込まれる。入力軸1に可動プーリ片4
はこの油圧シリンダーの作用と遠心力付与材10から与
えられる遠心力によって移動することになるので、油圧
を発生する手段は油圧のみに頼った機構よりは油圧発生
源を小さくすることができるとともに、空間部内9は油
で満たされることから遠心力付与材10はその動きは充
分に潤滑されておりスムーズになる。
Further, the outer extending portion 7b of the fixed piece 8 of the space portion 9
The packing 12 is attached to the contact portion with the space 9
The inside is oil-tight, and the inner extension 7 of the movable pulley piece is
An oil introducing hole 7c communicating with the space 9 is provided in a, and a hollow portion 15 provided in the bearing portion 14 of the housing 13 from the oil pump P that is an oil feeding means, the inside of the input shaft 1, and the fixed pulley piece 3 are provided. The oil that has passed through the fluid passage 16 provided in the sheave shaft 5 is taken into the space 9 that serves as a hydraulic cylinder through the oil introduction hole 7c. Movable pulley piece 4 on input shaft 1
Is moved by the action of the hydraulic cylinder and the centrifugal force given from the centrifugal force imparting member 10, so that the means for generating the hydraulic pressure can make the hydraulic pressure source smaller than that of the mechanism relying only on the hydraulic pressure. Since the space 9 is filled with oil, the centrifugal force imparting material 10 is sufficiently lubricated for smooth movement.

【0013】また一方、前記出力軸2に取り付けられた
変速プーリV2 においては出力軸2に固定プーリ片17
が嵌入されボルトによって固着され、他方これに相対向
して可動プーリ片18が固定プーリ片17のシーブ軸1
9に摺動可能に嵌め込まれている。更に、図3に示すよ
うに可動プーリ片の延長筒状部20には少なくとも1つ
以上の突出部21があり、この突出部の側面は長手方向
に対して角度θ1 、θ2 (夫々約20°〜70°)の傾
斜面21aになっている。なお、θ1 、θ2 は通常は差
を有するが、等しくなってもよい。一方、ストッパーの
延長筒状部22aには前記突出部21の側面の傾斜面2
1aに当接する傾斜面23aを持った窪み部23を有す
る。前記可動プーリ片とストッパーの延長筒状部20、
22aは突出部21と窪み部23が噛み合った状態にな
り、しかも夫々の傾斜面21a、23aが当接すること
により、可動プーリ片18が出力軸2にトルクを伝える
カム機構付のトルク伝達部24を備えている。各カム片
21、23の歯部がその傾斜面で互いに係合し、可動プ
ーリ片18が回転するとトルクが出力軸2へ伝達され、
またこの噛み合いから生じる軸方向に分力が可動プーリ
片18に効率的な推力を与えるようになっている。
On the other hand, in the speed change pulley V 2 attached to the output shaft 2, the fixed pulley piece 17 is attached to the output shaft 2.
Is fixed by bolts, while the movable pulley piece 18 is opposed to this and the movable pulley piece 18 is fixed to the sheave shaft 1 of the fixed pulley piece 17.
9 is slidably fitted. Further, as shown in FIG. 3, the extension cylindrical portion 20 of the movable pulley piece has at least one or more protrusions 21, and the side surfaces of the protrusions have angles θ 1 and θ 2 with respect to the longitudinal direction. 20 ° to 70 °). Note that although θ 1 and θ 2 usually have a difference, they may be the same. On the other hand, the extended cylindrical portion 22a of the stopper has an inclined surface 2 on the side surface of the protruding portion 21.
It has a recess 23 having an inclined surface 23a that abuts 1a. An extension cylindrical portion 20 of the movable pulley piece and the stopper,
The protrusion 22 and the recess 23 are in mesh with each other at 22a, and when the inclined surfaces 21a and 23a contact each other, the movable pulley piece 18 transmits the torque to the output shaft 2 by the torque transmitting portion 24 with the cam mechanism. Is equipped with. When the tooth portions of the cam pieces 21 and 23 are engaged with each other on their inclined surfaces and the movable pulley piece 18 rotates, torque is transmitted to the output shaft 2,
In addition, the component force in the axial direction generated from this meshing gives an efficient thrust to the movable pulley piece 18.

【0014】更に、上記のほか可動プーリ片18に推力
を与える補助手段として、可動プーリ片18の背部とス
トッパ7間に両プーリ片17、18によって形成するV
状溝が縮まる方向に作用するコイルスプリング25が介
設されている。このように構成された入力側変速プーリ
1 と出力側変速プーリV2 のあいだにベルトB1 を巻
き掛けることによって変速プーリV1 より変速プーリV
2 にベルトBを介して動力を伝達する本発明に係わる変
速装置が構成される。
Further, in addition to the above, a V formed by both pulley pieces 17, 18 between the back of the movable pulley piece 18 and the stopper 7 as an auxiliary means for applying a thrust to the movable pulley piece 18.
A coil spring 25 that acts in a direction in which the groove is contracted is provided. By wrapping the belt B 1 between the input-side speed change pulley V 1 and the output-side speed change pulley V 2 configured as described above, the speed change pulley V 1 is changed to the speed change pulley V 1.
A transmission device according to the present invention for transmitting power to belt 2 via belt B is constructed.

【0015】図4は本発明ベルト式無段変速装置の請求
項2に係わる実施例である。本実施例も前記の実施例と
同様、エンジンなどのクランク軸に間接的に連結された
入力軸32と出力軸33とが平行に配置され、これらの
軸32、33に取り付けられた変速プーリV3 、V4
にはベルトB2 が掛架されている。前記入力軸32に取
り付けられた変速プーリV3 においては、固定プーリ片
36がボルト37(または図示しないがスプライン、キ
ーその他の手段でもよい)によって入力軸32に固定さ
れ、他方これに対向する位置には可動プーリ片38が固
定プーリ片のシーブ軸39上に嵌入され、同時にスプラ
インまたはキー40に嵌め込まれ、入力軸2とともに回
転するするとともに軸方向には摺動可能になっている。
この固定プーリ片36の背部外周部にはリング状の流体
溜め部41が設けられ、少なくとも1つ以上のピトー管
42がその先端開口部43をこの流体溜め部41内に挿
入され油送手段を形成している。上記ピトー管42は固
定プーリ片36の回転数に応じて変化する流体溜め部4
1内の流体の速度および圧力を感知するものであり、ベ
ルト式無段変速装置31のハウジング44に固定され固
定プーリ片36の背面にあって固定プーリ片36の平面
に対して平行である面に管を回転することができるロー
タリージョイント45に接続されている。
FIG. 4 shows an embodiment of a belt type continuously variable transmission according to the present invention. In this embodiment as well, similarly to the above-described embodiments, an input shaft 32 and an output shaft 33, which are indirectly connected to a crankshaft of an engine or the like, are arranged in parallel, and a speed change pulley V attached to these shafts 32, 33. A belt B 2 is hung between 3 and V 4 . In the speed change pulley V 3 attached to the input shaft 32, a fixed pulley piece 36 is fixed to the input shaft 32 by a bolt 37 (or a spline, a key or other means (not shown)), and a position facing the other side. A movable pulley piece 38 is fitted on a sheave shaft 39 of the fixed pulley piece, and at the same time, fitted on a spline or a key 40 so as to rotate together with the input shaft 2 and be slidable in the axial direction.
A ring-shaped fluid reservoir 41 is provided on the outer periphery of the back portion of the fixed pulley piece 36, and at least one or more Pitot tubes 42 are inserted into the fluid reservoir 41 at their tip openings 43 to form an oil feeding means. Is forming. The pitot tube 42 is a fluid reservoir 4 that changes according to the number of rotations of the fixed pulley piece 36.
A surface for sensing the velocity and pressure of the fluid inside the fixed pulley piece 36, which is fixed to the housing 44 of the belt type continuously variable transmission 31 and is on the back surface of the fixed pulley piece 36 and parallel to the plane of the fixed pulley piece 36. It is connected to a rotary joint 45 that can rotate the tube.

【0016】そして、該ロータリージョイント45は、
一端にマイタ歯車90、91が設けられ、マイタ歯車9
1には一端がハウジング44外に突出された回転軸92
が設けられている。そして、ハウジング44外に突出さ
れた回転軸92の端にはレバー93が固定され、該レバ
ー93はワイヤー(図示しない)でエンジンのスロット
ルに連結されており、アクセルの踏み角に関係してレバ
ー93が揺動し、回転軸92、マイタ歯車90を経てロ
ータリージョイント45が回転し、図5に示すようにピ
トー管90が回転して、その開口97の位置が移動す
る。ピトー管90はスロットルを浅く踏んだ状態のとき
図5中の実線で描かれた最も油に深く浸かった位置にあ
り、スロットルを踏み込むに連れて浸かり方が浅い二点
鎖線の位置に移動し、更にスロットルを踏み込みフルス
ロットルの時には油に全く浸かっていない破線の位置に
移動する。つまり、フルスロットルのときピトー管で得
られる圧力すなわちピトー管により可動プーリ片38を
押圧する推力はゼロになり、キックダウンがスムーズに
行えるようになる。また一方、可動プーリ片38の背部
には油圧シリンダー46が設けられている。この油圧シ
リンダー46は固定プーリ片のシーブ軸39に固着され
た固定板47と可動プーリ片の筒状側壁48から構成さ
れ、圧力媒体となる作動油その他の流体の供給と排出に
よって内圧が変化している可動プーリ片38を矢印方向
へ移動可能にしている。、もちろん、上記固定板47の
頂面にパッキングを装着してもよい。
The rotary joint 45 is
Miter gears 90 and 91 are provided at one end, and the miter gear 9
1, the rotary shaft 92 has one end protruding outside the housing 44.
Is provided. A lever 93 is fixed to the end of the rotary shaft 92 protruding outside the housing 44, and the lever 93 is connected to the throttle of the engine by a wire (not shown). 93 swings, the rotary joint 45 rotates via the rotary shaft 92 and the miter gear 90, and the pitot tube 90 rotates as shown in FIG. 5, and the position of the opening 97 moves. The pitot tube 90 is at the position where it is deeply immersed in the oil drawn by the solid line in FIG. 5 when the throttle is stepped on shallowly, and as the throttle is stepped on, it moves to the position of the two-dot chain line where the way of dipping is shallow, When the throttle is fully depressed, it moves to the position indicated by the broken line where it is not completely immersed in oil when full throttle is applied. That is, the pressure obtained by the Pitot tube at the time of full throttle, that is, the thrust for pressing the movable pulley piece 38 by the Pitot tube becomes zero, and the kick down can be smoothly performed. On the other hand, a hydraulic cylinder 46 is provided behind the movable pulley piece 38. The hydraulic cylinder 46 is composed of a fixed plate 47 fixed to a sheave shaft 39 of a fixed pulley piece and a cylindrical side wall 48 of a movable pulley piece. The internal pressure is changed by the supply and discharge of hydraulic oil or other fluid as a pressure medium. The movable pulley piece 38 is movable in the arrow direction. Of course, packing may be attached to the top surface of the fixing plate 47.

【0017】そして油圧シリンダー46は入力軸32内
に設けられた流体通路49を介して入力軸32の一端に
連通され、ハウジング44の軸受け部に設けられた空洞
95に開口している。そして、ハウジング44の空洞部
95は油圧ホース96またはケース内通路によって、ロ
ータリージョイント45に接続されており、油圧シリン
ダー46のピトー管42は流体通路49、空洞95、油
圧ホース96、ロータリージョイント45よりなる一連
の油圧回路によってピトー管42および流体溜め部41
に接続されている。そのため、流体溜め部41内の流体
はピトー管42の先端開口部43から流入、排出され、
常時入力軸32の回転数に応じて油圧シリンダー46の
内圧を調節している。
The hydraulic cylinder 46 communicates with one end of the input shaft 32 through a fluid passage 49 provided in the input shaft 32 and opens into a cavity 95 provided in a bearing portion of the housing 44. The cavity 95 of the housing 44 is connected to the rotary joint 45 by a hydraulic hose 96 or a passage in the case, and the pitot tube 42 of the hydraulic cylinder 46 is connected to the fluid passage 49, the cavity 95, the hydraulic hose 96, and the rotary joint 45. Pitot tube 42 and fluid reservoir 41 by a series of hydraulic circuits
It is connected to the. Therefore, the fluid in the fluid reservoir 41 flows in and out through the tip opening 43 of the pitot tube 42,
The internal pressure of the hydraulic cylinder 46 is constantly adjusted according to the rotation speed of the input shaft 32.

【0018】また、前記流体溜め部41には、流体を常
に補給する流体供給部50があって、これは本装置31
のハウジング44内に溜められた流体、すなわち油など
をパイプ52を介して、タンク53内へ回収し、ポンプ
54によって流体供給口55から流体溜め部41へ補給
するもので、流体は常にリサイクルされている。尚、流
体溜め部41から溢れ出た流体は自然に落下する。更
に、油圧シリンダー46内には入力軸32を中心とする
放射状にガイド溝56が複数本設けられており、そのガ
イド溝56内には遠心推力付与材となるボール57が収
設されている。固定板47は可動プーリ片38側へ傾い
たテーパが付いており、この入力軸32の可動プーリ片
38は入力軸32の回転数が上がると前記のようにピト
ー管43によって得られた油圧の推力で押されるととも
にボール57が発生する遠心力によっても押されること
になる。
Further, the fluid reservoir 41 has a fluid supply unit 50 for constantly replenishing the fluid, which is the present device 31.
The fluid stored in the housing 44, that is, oil or the like is collected into the tank 53 through the pipe 52 and is replenished from the fluid supply port 55 to the fluid reservoir 41 by the pump 54. The fluid is always recycled. ing. The fluid overflowing from the fluid reservoir 41 falls naturally. Further, a plurality of guide grooves 56 are provided in the hydraulic cylinder 46 in a radial pattern centered on the input shaft 32, and in the guide grooves 56, balls 57 serving as centrifugal thrust imparting materials are housed. The fixed plate 47 has a taper inclined toward the movable pulley piece 38 side, and the movable pulley piece 38 of the input shaft 32 is provided with the hydraulic pressure obtained by the pitot tube 43 as described above when the rotation speed of the input shaft 32 increases. It is pushed by thrust as well as the centrifugal force generated by the ball 57.

【0019】また、一方出力軸33に取り付けられた変
速プーリV4 においては、固定プーリ片66が出力軸3
3に一体的に固着され、他方これに対向するように可動
プーリ片68固定プーリ片のシーブ軸69上に嵌入され
ているベルトB2 を係合するV状溝を形成している。前
記可動プーリ片68は固定プーリ片のシーブ軸69上を
摺動自在で軸方向に対して移動可能なようになっている
が、この固定プーリ片66のシーブ軸69上にはフラン
ジ状のストッパー70がボルト71によって固定され、
また該ストッパー70と可動プーリ片68の間には反発
弾性を有するコイルスプリング72が常に可動プーリ片
68を固定プーリ片66の方向へ押圧する状態に取り付
けられている。
On the other hand, in the speed change pulley V 4 attached to the output shaft 33, the fixed pulley piece 66 is provided on the output shaft 3 side.
3, a V-shaped groove that engages with the belt B 2 that is fitted on the sheave shaft 69 of the fixed pulley piece of the movable pulley piece 68 so as to be opposed thereto is formed. The movable pulley piece 68 is slidable on the sheave shaft 69 of the fixed pulley piece and movable in the axial direction. The sheave shaft 69 of the fixed pulley piece 66 has a flange-shaped stopper on the sheave shaft 69. 70 is fixed by bolts 71,
A coil spring 72 having repulsive elasticity is mounted between the stopper 70 and the movable pulley piece 68 so as to constantly press the movable pulley piece 68 toward the fixed pulley piece 66.

【0020】更に、可動プーリ片68とストッパー70
の延長筒状部73、76の間には傾斜面を有するトルク
伝達部80が形成されている。すなわち、可動プーリ片
68が回転すると可動プーリ片の突出部73とストッパ
ー80から出力軸33へ伝達される。また、前記トルク
伝達部80の傾斜面同志の噛み合い力から生じる軸方向
の分力とスプリング力は可動プーリ片68に効率的な推
力を与えている。この実施例では、油圧発生源として変
速プーリに組み込んだピトー管で得られる油圧を使用し
ているので特別に油圧ポンプを設けなくて済み、装置を
コンパクト化するのに寄与する。
Further, the movable pulley piece 68 and the stopper 70
A torque transmission portion 80 having an inclined surface is formed between the extended cylindrical portions 73 and 76. That is, when the movable pulley piece 68 rotates, it is transmitted from the projecting portion 73 and the stopper 80 of the movable pulley piece to the output shaft 33. Further, the axial component force and the spring force generated from the meshing force between the inclined surfaces of the torque transmission portion 80 give an efficient thrust to the movable pulley piece 68. In this embodiment, since the hydraulic pressure obtained by the Pitot tube incorporated in the speed change pulley is used as the hydraulic pressure generation source, it is not necessary to provide a special hydraulic pump, which contributes to downsizing of the device.

【0021】[0021]

【発明の効果】本発明のベルト式無段変速装置は以上の
ような構成を取り、可動プーリ片を押圧する推力として
油圧による推力と遠心力による推力を併用しているの
で、それぞれが推力を分け合えるために大掛かりな油圧
発生装置を設ける必要がなくメカロスを少なくすること
ができる。また、遠心力を発生する遠心力付与材は多数
使用しているので充分な遠心力が得られるとともにその
一つ一つを互いが接触しないようにガイド溝に収設して
いるので遠心推力付与材がブリッジを形成することもな
く、また遠心推力付与材を油で潤滑していることからそ
の動きは滑らかであり、変速動作もスムーズである。
The belt type continuously variable transmission according to the present invention has the above-mentioned structure and uses both the thrust by hydraulic pressure and the thrust by centrifugal force as thrust for pressing the movable pulley piece. Since it is not necessary to provide a large-scale hydraulic pressure generation device for sharing, it is possible to reduce mechanical loss. In addition, since many centrifugal force generating materials that generate centrifugal force are used, sufficient centrifugal force can be obtained, and each is housed in the guide groove so that they do not contact each other, so centrifugal thrust is applied. The material does not form a bridge, and because the centrifugal thrust applying material is lubricated with oil, its movement is smooth and the shifting operation is also smooth.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るベルト式無段変速装置の部分断面
図である。
FIG. 1 is a partial cross-sectional view of a belt type continuously variable transmission according to the present invention.

【図2】図1のA−A断面図である。FIG. 2 is a sectional view taken along line AA of FIG.

【図3】出力軸に設けたカム機構付のトルク伝達部の斜
視図である。
FIG. 3 is a perspective view of a torque transmission unit with a cam mechanism provided on the output shaft.

【図4】本発明の別の実施例に係わるベルト式無段変速
装置の断面図である。
FIG. 4 is a sectional view of a belt type continuously variable transmission according to another embodiment of the present invention.

【図5】図4のB−B断面図である。5 is a sectional view taken along line BB of FIG.

【符号の説明】[Explanation of symbols]

1 入力軸 2 出力軸 3 固定プーリ片 4 可動プーリ片 5 シーブ軸 7a 内延設部 7b 外延設部 8 固定片 9 ガイド溝 10 遠心力付与材 12 パッキング 13 ハウジング 16 流体通路 31 ベルト式無段変速装置 32 入力軸 33 出力軸 36 固定プーリ片 38 可動プーリ片 41 流体溜め部 42 ピトー管 43 開口部 B1 ベルト B2 ベルト V1 変速プーリ V2 変速プーリ V3 変速プーリ V4 変速プーリ1 Input Shaft 2 Output Shaft 3 Fixed Pulley Piece 4 Movable Pulley Piece 5 Sheave Shaft 7a Inner Extension 7b Outer Extension 8 Fixing Piece 9 Guide Groove 10 Centrifugal Force Applying Material 12 Packing 13 Housing 16 Fluid Passage 31 Belt Type Continuously Variable Speed Device 32 Input shaft 33 Output shaft 36 Fixed pulley piece 38 Movable pulley piece 41 Fluid reservoir 42 Pitot tube 43 Opening B 1 belt B 2 belt V 1 speed change pulley V 2 speed change pulley V 3 speed change pulley V 4 speed change pulley

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 入力軸と出力軸にそれぞれ固定プーリ片
と、このプーリ片に対向して軸上の長手方向に移動可能
に可動プーリ片を設け、これら両プーリ片によって形成
された両V状溝に動力伝動ベルトを掛架したベルト式無
段変速装置において、前記入力軸に配設した可動プーリ
片の背部に該背部後方の軸に固着した固定片と前記可動
プーリ片の背面から突出した内外延設部によって油密性
の空間部を形成し、この空間部内に複数の放射状のガイ
ド溝を設け、該ガイド溝内にはガイド溝中を移動可能な
遠心力付与材を収設し、更に該空間部に油導入孔を設け
該油導入孔は外部の油送手段に接続されていることを特
徴とするベルト式無段変速装置。
1. A fixed pulley piece is provided on each of the input shaft and the output shaft, and a movable pulley piece is provided opposite to the pulley piece so as to be movable in the longitudinal direction of the shaft, and both V-shapes formed by these pulley pieces. In a belt type continuously variable transmission in which a power transmission belt is hung in a groove, a fixed piece fixed to a shaft behind the movable pulley piece disposed on the input shaft and a rear surface of the movable pulley piece and projected from the back surface of the movable pulley piece. An oil-tight space portion is formed by the inner and outer extending portions, a plurality of radial guide grooves are provided in the space portion, and a centrifugal force imparting material that can move in the guide groove is housed in the guide groove. Further, the belt type continuously variable transmission is characterized in that an oil introducing hole is provided in the space and the oil introducing hole is connected to an external oil feeding means.
【請求項2】 油送手段が、入力軸または出力軸ととも
に回転する流体溜め部と該流体溜め部内にその開口部を
挿入されたピトー管である請求項1記載のベルト式無段
変速装置。
2. The belt type continuously variable transmission according to claim 1, wherein the oil feeding means is a fluid reservoir portion that rotates together with the input shaft or the output shaft, and a pitot tube having an opening portion inserted in the fluid reservoir portion.
JP17492392A 1992-06-08 1992-06-08 Belt type continuously variable transmission Pending JPH05340452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17492392A JPH05340452A (en) 1992-06-08 1992-06-08 Belt type continuously variable transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17492392A JPH05340452A (en) 1992-06-08 1992-06-08 Belt type continuously variable transmission

Publications (1)

Publication Number Publication Date
JPH05340452A true JPH05340452A (en) 1993-12-21

Family

ID=15987083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17492392A Pending JPH05340452A (en) 1992-06-08 1992-06-08 Belt type continuously variable transmission

Country Status (1)

Country Link
JP (1) JPH05340452A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006275288A (en) * 2005-03-25 2006-10-12 Sanyang Industry Co Ltd Power transmission mechanism
JP2008540943A (en) * 2005-05-02 2008-11-20 パーデュー・リサーチ・ファウンデーション Device for electronically assisting and operating a continuously variable transmission
JP2009168198A (en) * 2008-01-18 2009-07-30 Nsk Ltd Toroidal type continuously variable transmission
CN101900191A (en) * 2010-08-31 2010-12-01 胡福喜 Energy-saving automatic regulating stepless speed change device
JP2015500966A (en) * 2011-12-13 2015-01-08 ピアッジオ・アンド・シー.・エス.ピー.エー.Piaggio & C. S.P.A. Transmission system with gear change curve adjustment device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006275288A (en) * 2005-03-25 2006-10-12 Sanyang Industry Co Ltd Power transmission mechanism
JP2008540943A (en) * 2005-05-02 2008-11-20 パーデュー・リサーチ・ファウンデーション Device for electronically assisting and operating a continuously variable transmission
JP2009168198A (en) * 2008-01-18 2009-07-30 Nsk Ltd Toroidal type continuously variable transmission
CN101900191A (en) * 2010-08-31 2010-12-01 胡福喜 Energy-saving automatic regulating stepless speed change device
JP2015500966A (en) * 2011-12-13 2015-01-08 ピアッジオ・アンド・シー.・エス.ピー.エー.Piaggio & C. S.P.A. Transmission system with gear change curve adjustment device

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