JPH04203647A - Variable speed pulley - Google Patents
Variable speed pulleyInfo
- Publication number
- JPH04203647A JPH04203647A JP33646890A JP33646890A JPH04203647A JP H04203647 A JPH04203647 A JP H04203647A JP 33646890 A JP33646890 A JP 33646890A JP 33646890 A JP33646890 A JP 33646890A JP H04203647 A JPH04203647 A JP H04203647A
- Authority
- JP
- Japan
- Prior art keywords
- cam
- flyweight
- force
- centrifugal force
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000001133 acceleration Effects 0.000 abstract description 12
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000007600 charging Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
Landscapes
- Transmissions By Endless Flexible Members (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的コ
（産業上の利用分野）
この発明は、ベルト式無段変速機の変速プーリに関する
。DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Field of Industrial Application) This invention relates to a speed change pulley for a belt type continuously variable transmission.
（従来の技術）
実開昭６２−１４５９４９号公報に「機械式過給機の駆
動機構」か記載されている。これはエンジンと機械式過
給機との間にベルト式無段変速機を配置した駆動機構で
あり、エンジンの回転数か上昇すると、ウェイトの遠心
力によって変速ブーりのフランジ間隔を変化させ変速プ
ーリのヘルドピッチ径を調節して、エンジンの低中速域
で過給機に充分な回転数を与え、高速域で過大な過給圧
を回避するように構成されている。又、ＰＣＴの公開パ
ンフレットＷ（１８９１０２５２１に［ＭＥＣＨＡＮＩ
ＣＡＬ ＤＲＩＶＥ ＦＯＲＴＨＥ ＣＨＡＲＧ
ＩＮＧ ＢＬＯＷＥＲＯＦ ＩＮＴＥＲＮＡＬ
ＣＯＭＢＵＳＴＩＯＮ ＥＮＧＩＮＥＳＪが記載され
ている。これは遠心コンプレッサ型の機械式過給機の駆
動機構である。(Prior Art) Japanese Utility Model Application Publication No. 62-145949 describes a "drive mechanism for a mechanical supercharger". This is a drive mechanism in which a belt-type continuously variable transmission is placed between the engine and a mechanical supercharger, and as the engine speed increases, the centrifugal force of the weights changes the flange spacing of the gearbox to change gears. The heald pitch diameter of the pulley is adjusted to give the supercharger a sufficient number of revolutions in the engine's low-to-medium speed range, and to avoid excessive boost pressure in the high-speed range. In addition, the PCT public pamphlet W (189102521 [MECHANI
CAL DRIVE FORTHE CHARG
ING BLOWEROF INTERNAL
COMBUSTION ENGINESJ is listed. This is a drive mechanism for a centrifugal compressor type mechanical supercharger.
（発明か解決しようとする課題）
ところが、前者はｔ＼ルトピッチ径の調節を専らウェイ
トの遠心力に頼っており、従ってエンジンの加速度に応
じた制御かできない。又、後者に用いられているような
遠心コンプレッサには比較的低回転域に空気が自励振動
を起こし動作か不安定になるサージング域がある。前者
のような駆動機構と遠心コンプレッサとを組合わせると
、減速時などにエンジンのスロットルをＯＦＦにした場
合にコンプレッサ回転数の立下がりか遅いためにこのサ
ージング域に留まる時間が長く、不具合である。(Problem to be solved by the invention) However, the former relies exclusively on the centrifugal force of the weight to adjust the pitch diameter, and therefore can only be controlled in accordance with the acceleration of the engine. In addition, centrifugal compressors such as those used in the latter have a surging region in which air self-excited vibration occurs in a relatively low rotation region and operation becomes unstable. When the former type of drive mechanism is combined with a centrifugal compressor, when the engine throttle is turned off during deceleration, etc., the compressor rotational speed falls slowly and remains in this surging region for a long time, which is a problem. .
そこで、この発明はベルト式無段変速機において回転数
たけてなく加速度により変速特性の調節を行うことので
きる変速プーリの提供を目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a speed change pulley in a belt type continuously variable transmission that can adjust speed change characteristics based on acceleration without increasing the number of revolutions.
［発明の構成］
（課題を解決するための手段）
この発明の変速プーリは、固定フランジと可動フランジ
との間に装着したベルトのピッチ径を可動フランジの軸
方向移動により調節し変速を行うベルト式無段変速機用
の変速プーリであって、フライウェイトの遠心力を受け
て可動フランジに前記軸方向移動をさせる第１のカムと
、回転方向のカム角を有しフライウェイトの慣性力によ
り前記遠心力を調整する第２のカムとを備えたことを特
徴とする。[Structure of the Invention] (Means for Solving the Problem) The speed change pulley of the present invention is a belt that changes speed by adjusting the pitch diameter of the belt installed between a fixed flange and a movable flange by moving the movable flange in the axial direction. A variable speed pulley for a continuously variable transmission, which includes a first cam that moves the movable flange in the axial direction in response to the centrifugal force of the flyweight, and a cam having a cam angle in the rotational direction and due to the inertia of the flyweight. and a second cam that adjusts the centrifugal force.
（作用）
第２のカムはフライウェイトの慣性力によってフライト
ウェイトの遠心力を調節し、第１のカムによるベルトピ
ッチ径の変化を制御する。こうして、回転数による変速
に加えて、この変速特性に加速度に応して調節できる。(Function) The second cam adjusts the centrifugal force of the flyweight by the inertial force of the flyweight, and controls the change in belt pitch diameter caused by the first cam. In this way, in addition to the speed change based on the rotational speed, this speed change characteristic can be adjusted in accordance with the acceleration.
（実施例） 第１図ないし第３図により第１実施例の説明をする。(Example) The first embodiment will be explained with reference to FIGS. 1 to 3.
この実施例の変速プーリ１を用いたベルト式無段変速機
は車両の過給機の駆動機構に用いられ、変速プーリ１は
従動側の変速プーリである。以下、左右の方向は第１図
での左右の方向であり、番号を付していない部材等は図
示されていない。A belt type continuously variable transmission using the variable speed pulley 1 of this embodiment is used in a drive mechanism of a supercharger of a vehicle, and the variable speed pulley 1 is a variable speed pulley on the driven side. Hereinafter, the left and right directions are the left and right directions in FIG. 1, and unnumbered members and the like are not shown.
第１図に示すように、変速プーリ１の固定フランジ３は
中空軸５に固定されている。固定フランジ３には遠心コ
ンプレッサ式過給機のコンプレッサロータ軸に連結する
ためのねし穴７が設けられている。As shown in FIG. 1, a fixed flange 3 of a variable speed pulley 1 is fixed to a hollow shaft 5. As shown in FIG. The fixed flange 3 is provided with a tapped hole 7 for connection to a compressor rotor shaft of a centrifugal compressor type supercharger.
可動フランジ９は中空軸５上に軸方向移動自在に配設さ
れている。可動フランジ９にはカムプレート１３が固定
されている。The movable flange 9 is disposed on the hollow shaft 5 so as to be freely movable in the axial direction. A cam plate 13 is fixed to the movable flange 9.
中空軸５の左端部にはカム部材１５か固定されており、
カム部材１５と可動フランジ９との間には可動フランジ
９を固定フランジ３の方向に付勢するコイルばね１７と
、０リング１９とが配置されている。A cam member 15 is fixed to the left end of the hollow shaft 5,
A coil spring 17 that urges the movable flange 9 toward the fixed flange 3 and an O-ring 19 are arranged between the cam member 15 and the movable flange 9.
固定フランジ３と可動フランジ９との間にはベルト溝２
］か形成され、ベルト溝２１にはＶベルト２３が装着さ
れている。変速プーリ］はベルト２３により駆動側の変
速プーリに連結されており、この変速プーリはエンジン
のクランクシャフトに連結されている。A belt groove 2 is provided between the fixed flange 3 and the movable flange 9.
] is formed, and a V-belt 23 is attached to the belt groove 21. The speed change pulley] is connected to a drive side speed change pulley by a belt 23, and this speed change pulley is connected to the crankshaft of the engine.
コイルばね１７と駆動側変速プーリのばねとによりベル
ト２３には一定の張力が与えられ、ヘルドとプーリとの
スリップか防止される。A constant tension is applied to the belt 23 by the coil spring 17 and the spring of the drive-side speed change pulley, thereby preventing slippage between the heald and the pulley.
第１図上半部は可動フランジ９が右へいっばいに移動し
た状態を示しており、この状態では変速プーリ１のベル
トピッチ径が最大となる。従って駆動側変速プーリのベ
ルトピッチ径が最小となり、無段変速機の変速比は最小
（減速）になる。又、第１図下半部は可動フランジ９が
左へいっばいに移動した状態を示しており、この状態で
は変速プーリ１のベルトピッチ径か最小となる。従って
駆動側変速プーリのベルトピッチ径か最大となり、変速
比は最大（増速）になる。The upper half of FIG. 1 shows a state in which the movable flange 9 has moved all the way to the right, and in this state, the belt pitch diameter of the speed change pulley 1 is at its maximum. Therefore, the belt pitch diameter of the drive-side speed change pulley becomes the minimum, and the speed ratio of the continuously variable transmission becomes the minimum (deceleration). The lower half of FIG. 1 shows a state in which the movable flange 9 has moved all the way to the left, and in this state, the belt pitch diameter of the speed change pulley 1 is at its minimum. Therefore, the belt pitch diameter of the drive side speed change pulley becomes maximum, and the speed change ratio becomes maximum (speed increase).
第１図に示すように、カムプレート］３とカム部材１５
にはフライトウェイト２５の遠心力を受けて可動フラン
ジ９を右方へ移動させ、変速比を小さくする第１のカム
２７か形成されている。従って、第３図のグラフ２９に
示すように、エンジン（駆動側変速プーリ）の回転は低
中速回転域では無段変速機によって増速され過給機はエ
ンジン負荷に対して充分な過給圧を発生し、エンジンの
高回転域では無段変速機により減速され過給圧が過大に
なることが防止され、エンジンが保護される。As shown in FIG. 1, the cam plate] 3 and the cam member 15
A first cam 27 is formed in which the movable flange 9 is moved to the right by the centrifugal force of the flight weight 25, thereby reducing the gear ratio. Therefore, as shown in graph 29 in Figure 3, the rotation of the engine (drive side variable pulley) is increased by the continuously variable transmission in the low to medium speed range, and the supercharger provides sufficient supercharging for the engine load. In the high speed range of the engine, the continuously variable transmission reduces the speed and prevents the supercharging pressure from becoming excessive, protecting the engine.
第２図（ａ）に示すように、カム部材１５にはフライウ
ェイト２５の両側に回転方向３１に対してカム角θを有
する第２のカム３３．３５か形成されている。As shown in FIG. 2(a), second cams 33 and 35 having a cam angle θ with respect to the rotational direction 31 are formed on both sides of the flyweight 25 in the cam member 15.
従って、エンジン（変速プーリ１）の加速時にはフライ
ウェイト２５の負の慣性力を受けてカム３５に径方向内
向きのカム力が発生してフライトウェイト２５の遠心力
か低減され第１のカム２７による減速が緩和され、それ
たけ過給圧が上昇しエンジン出力が増加する。又、減速
時にはフライウェイト２５の正の慣性力を受けてカム３
３に径方向外向きのカム力か発生しフライウェイト２５
の遠心力が増加し第１のカム２７による減速が促進され
、過給機の回転が急速に立下がりサージング域に長く留
まることがない。Therefore, when the engine (speed change pulley 1) accelerates, a radially inward cam force is generated on the cam 35 in response to the negative inertia of the flyweight 25, and the centrifugal force of the flightweight 25 is reduced. The deceleration caused by this is alleviated, and the supercharging pressure increases accordingly, increasing engine output. Also, during deceleration, the cam 3 receives the positive inertia of the flyweight 25.
3, a radially outward cam force is generated and the flyweight 25
The centrifugal force increases, and the deceleration by the first cam 27 is promoted, so that the rotation of the supercharger rapidly falls and does not stay in the surging region for a long time.
第３図のグラフ２９の上側斜線部分３７は加速時の変速
特性領域であり、下側斜線部分３９は減速時の変速特性
領域である。このように、無段変速機は変速プーリ１に
よって回転数に応じた変速に加えてこの変速特性を加速
度に応して調節可能であって、車両の加速時にはエンジ
ン出力が増加して加速性が向上し、減速時には過給機の
サージングの影響が少なくエンジンが安定して作動する
。The upper hatched portion 37 of the graph 29 in FIG. 3 is the shift characteristic region during acceleration, and the lower hatched portion 39 is the shift characteristic region during deceleration. In this way, the continuously variable transmission can not only change the speed according to the rotation speed using the speed change pulley 1, but also adjust the speed change characteristics according to the acceleration, and when the vehicle accelerates, the engine output increases and the acceleration performance is improved. During deceleration, the engine operates stably with less influence from supercharger surging.
次に、第１図、第３図、第４図により第２実施例の説明
をする。この実施例の変速プーリ４１を用いたベルト式
無段変速機は車両のエンジンによる補機（例えば、オイ
ルポンプやオルタネータ）の駆動機構に用いられている
。以下、第１実施例と同一の部材には同一の番号を付し
て引用しながら第１実施例との相異点を説明する。Next, the second embodiment will be explained with reference to FIGS. 1, 3, and 4. A belt-type continuously variable transmission using the variable speed pulley 41 of this embodiment is used in a drive mechanism for auxiliary equipment (for example, an oil pump or an alternator) driven by a vehicle engine. Hereinafter, the differences from the first embodiment will be explained while giving the same numbers to the same members as in the first embodiment and referring to them.
カム部材４３は中空軸５に固定されており、カムプレー
ト１３とカム部材４３にはフライウェイト２５の遠心力
を受けて可動フランジ９を右方へ移動させ変速比を小さ
くする第１のカム４５か形成されている。従って、第１
実施例と同様に第３図のグラフ２９のような変速特性が
得られる。The cam member 43 is fixed to the hollow shaft 5, and the cam plate 13 and the cam member 43 have a first cam 45 that receives the centrifugal force of the flyweight 25 to move the movable flange 9 to the right and reduce the gear ratio. or is formed. Therefore, the first
As in the embodiment, a shift characteristic as shown in graph 29 of FIG. 3 is obtained.
第４図（ａ）に示すように、カム部材４３にはフライウ
ェイト２５の両側に回転方向４７に対してカム角θの第
２のカム４９．５１が形成されている。As shown in FIG. 4(a), second cams 49.51 having a cam angle θ with respect to the rotational direction 47 are formed on both sides of the flyweight 25 in the cam member 43.
従って、エンジンの加速時にはフライウェイト２５の慣
性力を受けるカム５１に径方向外向きのカム力が発生し
フライウェイト２５の遠心力が増大し、第１のカム４５
による減速が促進され、加速時でも補機の回転数か大き
く上昇しないようにされる。又、減速時にはフライウェ
イト２５の慣性力−を受けるカム４つに径方向内向きの
カム力か発生しフライウェイト２５の遠心力が減少し、
第１のカム４５による減速が緩和され減速時でも補機の
回転数が大きく低下しないようにされている。Therefore, when the engine accelerates, a radially outward cam force is generated on the cam 51 that receives the inertia force of the flyweight 25, and the centrifugal force of the flyweight 25 increases, and the first cam 45
deceleration is promoted, and the rotational speed of the auxiliary equipment is prevented from increasing significantly even during acceleration. Also, during deceleration, a radially inward cam force is generated in the four cams that receive the inertia force of the flyweight 25, and the centrifugal force of the flyweight 25 is reduced.
The deceleration caused by the first cam 45 is relaxed so that the rotational speed of the auxiliary equipment does not drop significantly even during deceleration.
第３図において、グラフ２９の上側斜線部分３７は第１
実施例とは反対に減速時の変速特性領域となり、下側斜
線部分３９は加速時の変速特性領域となる。このように
、無段変速機は変速プーリ４１によって回転数に応じた
変速を行い、これに加えてこの変速特性を加速度に応じ
て調節可能であって、補機の回転数は車両の加減速時に
も大きく変動せず安定して作動する。In FIG. 3, the upper hatched portion 37 of the graph 29 is the first
Contrary to the embodiment, this is the shift characteristic region during deceleration, and the lower hatched portion 39 is the shift characteristic region during acceleration. In this way, the continuously variable transmission uses the speed change pulley 41 to change speed according to the rotation speed, and in addition to this, the speed change characteristics can be adjusted according to the acceleration, and the rotation speed of the auxiliary equipment changes according to the acceleration/deceleration of the vehicle. It operates stably without major fluctuations.
なお、第２のカムのカム角は各実施例と異って対向する
カムのカム角が異ってもよい。従って必要があれば一方
のカム角が回転方向に対して正角で他方のカム角が負角
でもよく、一方のカム角が零（カムを設けない）でもよ
い。又、第１のカムによりフランジ間隔が広がるように
構成してもよく、この発明の変速プーリは駆動側にして
もよい。Note that the cam angle of the second cam may be different from each embodiment, and the cam angle of the opposing cam may be different. Therefore, if necessary, one cam angle may be a positive angle with respect to the rotation direction and the other cam angle may be a negative angle, or one cam angle may be zero (no cam is provided). Further, the first cam may be configured to widen the flange interval, and the speed change pulley of the present invention may be on the drive side.
［発明の効果］
この発明のベルト式無段変速機用の変速プーリは、第１
のカムにより回転数に応じた変速を行い、この変速特性
を第２のカムにより加速度に応じて調節できるように構
成したから、種々の機器に広い回転速度域で好適な回転
数を与え動作を安定させることができる。[Effect of the invention] The speed change pulley for a belt type continuously variable transmission of the present invention has a first
The second cam changes speed according to the rotation speed, and the second cam adjusts the speed change characteristics according to the acceleration, so various devices can be operated at a suitable rotation speed over a wide rotation speed range. It can be stabilized.
第１図は各実施例の断面図、第２図は第１実施例に係り
、同図（ａ）はカム部材の正面図、同図（ｂ）は同図（
ａ）のＡ−Ａ断面図、第３図は各実施例の特性を示すグ
ラフ、第４図は第２実施例に係り、同図（ａ）はカム部
材の正面図、同図（ｂ）は同図（ａ）のＡ−Ａ断面図で
ある。
３・・・固定フランジ
９・・・可動フランジ
２３・・・Ｖベルト（ベルト）
２５・・・フライウェイト
２７．４５・・・第１のカム
３３．３５．４９．５１・・・第２のカム代理人 弁理
士 三 好 秀 和
３・固定フランジ
９ 可動７ランジ
２３・・Ｖベルト（ベルト）
２５・−フライウェイト
２７．４５・−第１のカム
３３．３５．４９．５１・第２のカム
．４３Figure 1 is a sectional view of each embodiment, Figure 2 is related to the first embodiment, Figure (a) is a front view of the cam member, Figure (b) is the same figure (
3 is a graph showing the characteristics of each embodiment; FIG. 4 is related to the second embodiment; FIG. 4(a) is a front view of the cam member; FIG. is a sectional view taken along line A-A in FIG. 3...Fixed flange 9...Movable flange 23...V belt (belt) 25...Fly weight 27.45...First cam 33.35.49.51...Second cam Cam agent Patent attorney Hide Miyoshi Kazu 3 Fixed flange 9 Movable 7 lunge 23... V belt (belt) 25 - Fly weight 27.45 - First cam 33.35.49.51 - Second cam cam. 43
Claims (1)
ピッチ径を可動フランジの軸方向移動により調節し変速
を行うベルト式無段変速機用の変速プーリであって、フ
ライウェイトの遠心力を受けて可動フランジに前記軸方
向移動をさせる第１のカムと、回転方向のカム角を有し
フライウェイトの慣性力により前記遠心力を調整する第
２のカムとを備えたことを特徴とする変速プーリ。This is a speed change pulley for a belt-type continuously variable transmission that changes speed by adjusting the pitch diameter of the belt installed between a fixed flange and a movable flange by moving the movable flange in the axial direction. A variable speed pulley comprising: a first cam that causes the movable flange to move in the axial direction; and a second cam that has a cam angle in the rotational direction and adjusts the centrifugal force by the inertia of the flyweight. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33646890A JPH04203647A (en) | 1990-11-30 | 1990-11-30 | Variable speed pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33646890A JPH04203647A (en) | 1990-11-30 | 1990-11-30 | Variable speed pulley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04203647A true JPH04203647A (en) | 1992-07-24 |
Family
ID=18299455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33646890A Pending JPH04203647A (en) | 1990-11-30 | 1990-11-30 | Variable speed pulley |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04203647A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0861448A (en) * | 1994-08-23 | 1996-03-08 | Kitako:Kk | Continuously variable transmission |
-
1990
- 1990-11-30 JP JP33646890A patent/JPH04203647A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0861448A (en) * | 1994-08-23 | 1996-03-08 | Kitako:Kk | Continuously variable transmission |
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