JPH0754945A - Belt type continuously variable transmission - Google Patents

Belt type continuously variable transmission

Info

Publication number
JPH0754945A
JPH0754945A JP20325393A JP20325393A JPH0754945A JP H0754945 A JPH0754945 A JP H0754945A JP 20325393 A JP20325393 A JP 20325393A JP 20325393 A JP20325393 A JP 20325393A JP H0754945 A JPH0754945 A JP H0754945A
Authority
JP
Japan
Prior art keywords
belt
spring
pulley
flange
pressing force
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
JP20325393A
Other languages
Japanese (ja)
Inventor
Masayuki Sayama
正幸 佐山
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.)
GKN Driveline Japan Ltd
Original Assignee
Tochigi Fuji Sangyo KK
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 Tochigi Fuji Sangyo KK filed Critical Tochigi Fuji Sangyo KK
Priority to JP20325393A priority Critical patent/JPH0754945A/en
Publication of JPH0754945A publication Critical patent/JPH0754945A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To improve the lifetime of a sift pulley and bearing, shorten the time lag in disconnecting the operation force, and facilitate installation. CONSTITUTION:A continuously variable transmission 1 using belt is equipped with shift pulleys 5, 7 coupled through a belt 3, the first spring 59 and second spring 61 to give a tension to the belt with a major and a minor pressing force, a hydraulic actuator 9 to adjust the flange spacing against the belt tension and control the gear ratio, and a stopper 63 which receives the pressing force of the first spring when the pitch diameter of the first spring side shift pulley 7 maximizes.

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、ベルト式無段変速機
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt type continuously variable transmission.

【0002】[0002]

【従来の技術】公開実用平成2−85062号公報に図
5のような変速プーリ201が記載されている。これ
は、固定フランジ203と可動フランジ205とを備
え、各フランジ203,205間に装着されたベルト2
07を介して他の変速プーリと連結され、ベルト式無段
変速機を構成している。可動フランジ205は皿ばね2
09により固定フランジ203側に押圧されてベルト2
07に張力を与えている。他側の変速プーリでは例えば
オイルポンプ駆動の油圧アクチュエータにより可動フラ
ンジをベルト張力に抗して固定フランジ側に押圧し、両
変速プーリのフランジ間隔を変えて変速比を調節してい
る。ポンプ圧を与えない時は図5の下半部の様に皿ばね
209の押圧力により変速プーリ201のフランジ間隔
が最小(プーリピッチ系が最大)になり、変速プーリ2
01が従動側の場合はベルト式無段変速機は減速比が最
大になる。
2. Description of the Related Art A speed change pulley 201 as shown in FIG. 5 is disclosed in Japanese Laid-Open Utility Model Publication No. 2-85062. This is a belt 2 that includes a fixed flange 203 and a movable flange 205, and is mounted between the flanges 203 and 205.
The belt type continuously variable transmission is configured by being connected to another transmission pulley via 07. The movable flange 205 is the disc spring 2
The belt 2 is pressed against the fixed flange 203 side by 09.
07 is given tension. In the speed change pulley on the other side, for example, a hydraulic actuator driven by an oil pump presses the movable flange against the belt tension against the fixed flange side, and the flange ratio of both speed change pulleys is changed to adjust the speed ratio. When the pump pressure is not applied, the flange spacing of the speed change pulley 201 becomes minimum (the pulley pitch system is maximum) due to the pressing force of the disc spring 209 as in the lower half of FIG.
When 01 is the driven side, the belt type continuously variable transmission has the maximum reduction ratio.

【0003】[0003]

【発明が解決しようとする課題】ところが、上記のよう
にポンプ圧が掛っていない状態でも皿ばね209による
ベルト張力は両方の変速プーリを互いに引き寄せる方向
に働いている。従って、変速プーリ201側のベアリン
グ211,213,215と他側の変速プーリのベアリ
ングやベルト207に負荷が常時掛るから、ベルト20
7の寿命が短くなると共にベアリング寿命を改善するた
めに各ベアリングを大型にする必要がある。
However, even when the pump pressure is not applied as described above, the belt tension by the disc spring 209 acts in the direction in which both the speed change pulleys are attracted to each other. Therefore, since the bearings 211, 213, 215 on the speed change pulley 201 side and the bearings on the speed change pulley on the other side and the belt 207 are constantly loaded, the belt 20
It is necessary to increase the size of each bearing in order to shorten the life of No. 7 and improve the life of the bearing.

【0004】又、上記の変速プーリ201ではオイルポ
ンプを停止すると皿ばね209によりフランジ間隔が使
用範囲の最小値より更に狭くなるから、オイルポンプの
起動時に可動フランジがこの最小値の位置まで復帰する
時間分のタイムラグが生じる。
Further, in the above-mentioned speed change pulley 201, when the oil pump is stopped, the flange spacing becomes further narrower than the minimum value of the use range due to the disc spring 209. Therefore, when the oil pump is started, the movable flange returns to the position of this minimum value. There is a time lag of time.

【0005】更に、組付けに当っては皿ばね209の押
圧力が掛るから、可動フランジ205、皿ばね209、
ベルト207などの組付け作業が困難である。
Further, since the pressing force of the disc spring 209 is applied during assembly, the movable flange 205, the disc spring 209,
It is difficult to assemble the belt 207 and the like.

【0006】そこで、この発明は、変速プーリを支える
ベアリング及びベルトの寿命が長く、操作力を断続した
時のタイムラグが短く、又組付けが容易なベルト式無段
変速機の提供を目的とする。
Therefore, an object of the present invention is to provide a belt type continuously variable transmission which has a long service life of bearings and belts for supporting the speed change pulley, has a short time lag when the operating force is interrupted, and is easy to assemble. .

【0007】[0007]

【課題を解決するための手段】この発明のベルト式無段
変速機は、固定フランジと可動フランジ間に装着したベ
ルトを介して連結されフランジ間隔変化に伴って変速比
を変える一対の変速プーリと、可動フランジを固定フラ
ンジ側にそれぞれ大小の押圧力で押圧しベルトに張力を
与える第1ばね及び第2ばねと、ベルト張力に抗して可
動フランジを移動操作し変速比を調節する油圧アクチュ
エータと第1ばねを装着した変速プーリのプーリピッチ
径が最大になると第1ばねの押圧力を受けるストッパを
備えたことを特徴とするベルト式無段変速機を特徴とす
る。
SUMMARY OF THE INVENTION A belt type continuously variable transmission according to the present invention includes a pair of speed change pulleys which are connected via a belt mounted between a fixed flange and a movable flange and which change a speed change ratio in accordance with a change in flange spacing. A first spring and a second spring that apply tension to the belt by pressing the movable flange toward the fixed flange with large and small pressing forces respectively, and a hydraulic actuator that moves the movable flange against the belt tension to adjust the gear ratio. A belt type continuously variable transmission characterized in that it is provided with a stopper that receives the pressing force of the first spring when the pulley pitch diameter of the speed change pulley equipped with the first spring becomes maximum.

【0008】[0008]

【作用】油圧アクチュエータを駆動するオイルポンプを
停止すると、第1ばねと第2ばねの押圧力により一側変
速プーリのプーリピッチ径が最大になり、ここでストッ
パが作動して第1ばねの大きな押圧力を可動フランジか
ら遮断する。この時、第2ばねは小さい押圧力によって
ベルトに摩擦力を与え、変速比をこの状態に保つ。
When the oil pump that drives the hydraulic actuator is stopped, the pulley pitch diameter of the one-sided speed change pulley becomes maximum due to the pressing force of the first spring and the second spring, and the stopper operates there to cause a large pressing force of the first spring. Isolate pressure from moving flange. At this time, the second spring applies a frictional force to the belt with a small pressing force to keep the gear ratio in this state.

【0009】このように、ポンプを停止すると第1ばね
の大きい押圧力が遮断されベルト張力が極めて小さくな
り、変速プーリのベアリング及びベルトの負荷がそれだ
け軽減されて、これらの寿命が長くなりベアリングを大
型にする必要がない。又、プーリピッチ径最大の状態で
は第1ばねの強い押圧力が掛らないから、可動フランジ
はこの位置から殆んど移動しないから、従来例と異って
ポンプの起動時にフランジ間隔を所定値まで復帰させる
ためのタイムラグが実質的に零になる。こうして、ポン
プの断続による影響が解消されるから、ポンプを任意に
停止してエンジンの燃費を向上させることができる。
As described above, when the pump is stopped, the large pressing force of the first spring is cut off, the belt tension becomes extremely small, the load on the bearings and belt of the speed change pulley is reduced accordingly, and the service life of these bearings is extended and the bearings are extended. There is no need to make it large. Also, since the strong pressing force of the first spring is not applied when the pulley pitch diameter is the maximum, the movable flange hardly moves from this position. The time lag for returning is substantially zero. In this way, since the influence of the intermittent pump is eliminated, the pump can be arbitrarily stopped to improve the fuel efficiency of the engine.

【0010】又、組付けに当っては、可動フランジには
第2ばねの弱い押圧力しか掛らないからベルトなどの装
着が容易となり、組付け性が大幅に向上する。更に、ス
トッパにボルトを用いボルトの頭部に第1ばねを突き当
てるように構成すれば、ボルトの締め込みにより第1ば
ねの初期荷重を容易に調整することができる。
In assembly, since only a weak pressing force of the second spring is applied to the movable flange, a belt or the like can be easily attached and the assembling property is greatly improved. Further, if the stopper is a bolt and the first spring is abutted against the head of the bolt, the initial load of the first spring can be easily adjusted by tightening the bolt.

【0011】[0011]

【実施例】図1ないし図3により一実施例を説明をす
る。図1はこの実施例のベルト式無段変速機1を示して
いる。左右の方向は図1での左右の方向であり、符号を
附していない部材等は図示されていない。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. FIG. 1 shows a belt type continuously variable transmission 1 of this embodiment. The left and right directions are the left and right directions in FIG. 1, and members and the like without reference numerals are not shown.

【0012】図1のように、ベルト式無段変速機1はベ
ルト3で連結された駆動側と従動側の変速プーリ5,7
と、油圧アクチュエータ9とを備えている。
As shown in FIG. 1, the belt-type continuously variable transmission 1 is connected to the belt 3 with the drive side and driven side shift pulleys 5 and 7.
And a hydraulic actuator 9.

【0013】駆動側の変速プーリ5は、駆動軸11と一
体の固定フランジ13と、可動フランジ15とを備えて
いる。可動フランジ15はトルクカム17を介して駆動
軸11に相対回転しながら軸方向移動可能に連結されて
おり、各フランジ13,15間にはベルト3が装着され
ている。駆動軸11はベアリング19,21によりケー
シング23に支承され、駆動軸11とケーシング23と
の間にはシール25が配置されている。駆動軸11の左
端側には変速プーリ5の軸方向位置を調節し、ベルト3
のねじれを防止するナット27が取付けられている。
The speed change pulley 5 on the drive side includes a fixed flange 13 integral with the drive shaft 11 and a movable flange 15. The movable flange 15 is connected to the drive shaft 11 via a torque cam 17 so as to be movable in the axial direction while relatively rotating, and the belt 3 is mounted between the flanges 13 and 15. The drive shaft 11 is supported by the casing 23 by bearings 19 and 21, and a seal 25 is arranged between the drive shaft 11 and the casing 23. On the left end side of the drive shaft 11, the axial position of the speed change pulley 5 is adjusted so that the belt 3
A nut 27 is attached to prevent the twisting.

【0014】駆動軸11の右端部には増速歯車組の小歯
車29がスプライン連結されており、小歯車29はベア
リング31,33を介してケーシング23に支承されて
いる。増速歯車組は小歯車29と噛合った大歯車側から
入力するエンジンの駆動力を増速して変速プーリ5に伝
達する。
A small gear 29 of a speed increasing gear set is spline-connected to the right end of the drive shaft 11, and the small gear 29 is supported by the casing 23 via bearings 31 and 33. The speed increasing gear set speeds up the driving force of the engine, which is input from the side of the large gear that meshes with the small gear 29, and transmits it to the speed change pulley 5.

【0015】駆動軸11には隔壁部材35が圧入され、
可動フランジ15との間にオイルシール37を介して油
圧室39を形成し、油圧アクチュエータ9を構成してい
る。油圧アクチュエータ9にはエンジン駆動のオイルポ
ンプから、ケーシング23とスリーブ41と駆動軸11
と可動フランジ15とを通して形成された油路43を介
して、油圧が送られベルト張力に抗して可動フランジ1
5を右方へ移動操作する。又、このオイルはトルクカム
17を潤滑する。
A partition member 35 is press-fitted into the drive shaft 11,
A hydraulic chamber 39 is formed between the movable flange 15 and the movable flange 15 to form a hydraulic actuator 9. The hydraulic actuator 9 includes an engine-driven oil pump, a casing 23, a sleeve 41, and a drive shaft 11.
Hydraulic pressure is sent through an oil passage 43 formed through the movable flange 1 and the movable flange 15 to resist the belt tension.
Move 5 to the right. Further, this oil lubricates the torque cam 17.

【0016】従動側の変速プーリは、従動軸45と一体
の固定フランジ47と、可動フランジ49とを備えてい
る。可動フランジ49のボス51はトルクカム53を介
して従動軸45に相対回転しながら軸方向移動可能に連
結されており、各フランジ47,49間にはベルト3が
装着されている。
The speed change pulley on the driven side has a fixed flange 47 integrated with the driven shaft 45 and a movable flange 49. The boss 51 of the movable flange 49 is connected to the driven shaft 45 via the torque cam 53 so as to be movable in the axial direction while relatively rotating, and the belt 3 is mounted between the flanges 47 and 49.

【0017】従動軸45にはリテーナ55が圧入され、
リテーナ55と可動フランジ49との間には左からスペ
ーサ57と皿ばね59(第1ばね)とコイルばね61
(第2ばね)とが配置されており、ボス51の右端部外
周にはスナップリング63(ストッパ)が装着されてい
る。このように直列に配置された皿ばね59とコイルば
ね61は可動フランジ49を固定フランジ47側に押圧
してベルト3に張力を与える。皿ばね59の押圧力は強
く、コイルばねの61の押圧力は弱い。スペーサ57は
皿ばね59とコイルばね61の押圧力が設定値になるよ
うに厚さを調整する。
A retainer 55 is press-fitted onto the driven shaft 45,
A spacer 57, a disc spring 59 (first spring) and a coil spring 61 are arranged between the retainer 55 and the movable flange 49 from the left.
(Second spring), and a snap ring 63 (stopper) is attached to the outer periphery of the right end of the boss 51. The disc spring 59 and the coil spring 61 arranged in series in this manner press the movable flange 49 toward the fixed flange 47 to apply tension to the belt 3. The pressing force of the disc spring 59 is strong, and the pressing force of the coil spring 61 is weak. The thickness of the spacer 57 is adjusted so that the pressing force of the disc spring 59 and the coil spring 61 becomes a set value.

【0018】従動軸45はベアリング65,67を介し
てケーシング23に支承されており、ケーシング23を
貫通した左端部にはプーリ69がスプライン連結されて
いる。このプーリ69は各溝71,73に装着されたベ
ルトを介してエアコンプレッサのような補機側のプーリ
に連結されている。プーリ69とケーシング23との間
にはシール75が配置されている。又、ケーシング23
とスリーブ77と従動軸45とを通して形成された油路
79を介してオイルが送られてトルクカム53を潤滑す
る。従動軸45の右端側には変速プーリ7の軸方向位置
を調整し、ベルト3のねじれを防止するナット81が取
付けられている。
The driven shaft 45 is supported by the casing 23 via bearings 65 and 67, and a pulley 69 is spline-connected to the left end portion penetrating the casing 23. This pulley 69 is connected to a pulley on the auxiliary equipment side such as an air compressor via a belt mounted in each groove 71, 73. A seal 75 is arranged between the pulley 69 and the casing 23. Also, the casing 23
The oil is sent through an oil passage 79 formed through the sleeve 77 and the driven shaft 45 to lubricate the torque cam 53. A nut 81 that adjusts the axial position of the speed change pulley 7 and prevents the belt 3 from twisting is attached to the right end side of the driven shaft 45.

【0019】油圧アクチュエータ9に油圧を供給するオ
イルポンプを停止させると、変速プーリ7のプーリピッ
チ径R2 は皿ばね59とコイルばね61の押圧力を受け
て最大になると共に、変速プーリ5のプーリピッチ径R
1 はベルト張力を受けて最小になる。(図1のプーリ5
の下半部とプーリ7の上半部の状態)こうして、プーリ
5,7間の変速比は最大(増速比最小)になる。スナッ
プリング63はR2 が最大になると皿ばね59の押圧力
を受けるように位置を決められている。又、油圧アクチ
ュエータ9に油圧を与えると可動フランジ15がベルト
張力に抗して固定フランジ13側に移動操作されてプー
リピッチ径R1 が大きくなると共に、ベルト張力により
各ばね59,61に抗して可動フランジ49が固定フラ
ンジ47から後退し、プーリピッチ径R2 が小さくなっ
て変速比が小さく(増速比が大きく)なる。この変速比
はエンジン回転数の変動に伴う補機の回転数変動幅が小
さくなるように調整される。
When the oil pump for supplying the hydraulic pressure to the hydraulic actuator 9 is stopped, the pulley pitch diameter R 2 of the speed change pulley 7 is maximized under the pressing force of the disc spring 59 and the coil spring 61, and the pulley pitch of the speed change pulley 5 is increased. Diameter R
1 becomes the minimum due to the belt tension. (Pulley 5 in FIG. 1
(The state of the lower half portion and the upper half portion of the pulley 7) Thus, the gear ratio between the pulleys 5 and 7 becomes maximum (minimum speed increasing ratio). The snap ring 63 is positioned so as to receive the pressing force of the disc spring 59 when R 2 becomes maximum. When hydraulic pressure is applied to the hydraulic actuator 9, the movable flange 15 is moved to the fixed flange 13 side against the belt tension to increase the pulley pitch diameter R 1 , and the belt tension resists the springs 59 and 61. The movable flange 49 retracts from the fixed flange 47, the pulley pitch diameter R 2 becomes smaller, and the gear ratio becomes smaller (the speed increasing ratio becomes larger). This gear ratio is adjusted so that the fluctuation range of the rotational speed of the auxiliary machine due to the fluctuation of the engine rotational speed becomes small.

【0020】トルクカム17,53はトルク変動により
ベルト張力が急増したとき各可動フランジ15,49を
固定フランジ13,47側に押圧してベルト3の滑りを
防止する。
The torque cams 17 and 53 prevent the slippage of the belt 3 by pressing the movable flanges 15 and 49 toward the fixed flanges 13 and 47 when the belt tension suddenly increases due to torque fluctuations.

【0021】図2は変速プーリ5,7間の増速比に対す
る油圧アクチュエータ9の油圧を示すグラフ83であ
り、図3は増速比に対する皿ばね59及びコイルばね6
1のばね荷重を示すグラフ85,87である。各横軸の
minとmaxの間は補機回転数の変動幅を小さくする
ために設定された増速比の使用範囲である。グラフ83
のように増速比は油圧にほぼ比例して変速プーリ7の下
半部に示す増速比maxの状態と上半部に示す増速比m
inの状態との間で制御される。スナップリング63は
増速比がminになる迄は作用しないから、増速比の使
用範囲内では皿ばね59とコイルばね61の両方の押圧
力が可動フランジ49に掛り、この間のばね荷重はグラ
フ85のようになる。又、増速比がminになると皿ば
ね59がスナップリング63に突き当たるから、可動フ
ランジ49にはグラフ87のようにコイルばね61の弱
い押圧力だけが作用し、増速比をこの状態に保持する。
FIG. 2 is a graph 83 showing the hydraulic pressure of the hydraulic actuator 9 with respect to the speed increasing ratio between the speed change pulleys 5 and 7, and FIG. 3 is the disc spring 59 and the coil spring 6 with respect to the speed increasing ratio.
It is graphs 85 and 87 which show the spring load of No. 1. The range between min and max on each horizontal axis is the use range of the speed increasing ratio set in order to reduce the fluctuation range of the auxiliary machine speed. Graph 83
As described above, the speed increasing ratio is almost proportional to the hydraulic pressure, and the speed increasing ratio max is shown in the lower half of the speed change pulley 7 and the speed increasing ratio m is shown in the upper half.
controlled to the in state. Since the snap ring 63 does not work until the speed increasing ratio reaches min, the pressing force of both the disc spring 59 and the coil spring 61 is applied to the movable flange 49 within the use range of the speed increasing ratio, and the spring load during this period is shown in the graph. It becomes like 85. Further, when the speed increasing ratio becomes min, the disc spring 59 abuts on the snap ring 63, so that only a weak pressing force of the coil spring 61 acts on the movable flange 49 as shown in the graph 87, and the speed increasing ratio is maintained in this state. To do.

【0022】このように、増速比がminになると皿ば
ね59の大きな押圧力が遮断されるから、従来例と異っ
て油圧アクチュエータ9のオイルポンプを停止しても、
可動フランジ49が使用範囲外に大きく移動することが
防止され、オイルポンプの起動時に可動フランジを増速
比minの位置へ押し戻すためのタイムラグを実質的に
零にできる。又、このように皿ばね59の強い押圧力が
遮断される状態があるから、それだけベルト3の負荷及
びベルト張力による各ベアリング19,21,31,3
3,65,67の負荷が軽減され、ベルト3の寿命が向
上すると共に各ベアリングを大型にせずに充分なベアリ
ング寿命が得られる。こうして、オイルポンプの断続に
伴う従来の欠点を解消したから、ポンプを任意に停止さ
せて、エンジン燃費を改善することができる。
As described above, since the large pressing force of the disc spring 59 is cut off when the speed increasing ratio becomes min, even if the oil pump of the hydraulic actuator 9 is stopped unlike the conventional example,
It is possible to prevent the movable flange 49 from largely moving out of the usable range, and it is possible to substantially reduce the time lag for pushing the movable flange back to the position of the speed increasing ratio min when the oil pump is started. Further, since there is such a state that the strong pressing force of the disc spring 59 is cut off, the bearings 19, 21, 31, 3 caused by the load and the belt tension of the belt 3 are correspondingly cut off.
The loads of 3, 65 and 67 are reduced, the life of the belt 3 is improved, and a sufficient bearing life can be obtained without increasing the size of each bearing. In this way, the conventional drawbacks associated with the intermittent operation of the oil pump are eliminated, so that the pump can be arbitrarily stopped to improve the engine fuel consumption.

【0023】又、組付けはポンプ圧の掛らない状態で行
われ、この時皿ばね59の押圧力はスナップリング63
により可動フランジ49から遮断されるから、可動フラ
ンジ49、皿ばね59、ベルト3などの装着が容易であ
り、組付け性が大幅に向上する。
Further, the assembling is performed in a state where the pump pressure is not applied, and at this time, the pressing force of the disc spring 59 is applied to the snap ring 63.
Since it is blocked from the movable flange 49 by this, the movable flange 49, the disc spring 59, the belt 3 and the like can be easily attached, and the assembling property is greatly improved.

【0024】第2ばねであるコイルばね61は第1ばね
の皿ばね59と同じ方向に働けばよいから上記実施例の
配置箇所の他に、可動フランジ49とリテーナ55の間
(矢印89)、変速プーリ5側の隔壁部材35と可動フ
ランジ15の間(矢印93)などに配置してもよい。
Since the coil spring 61, which is the second spring, may act in the same direction as the disc spring 59 of the first spring, in addition to the location of the above-described embodiment, between the movable flange 49 and the retainer 55 (arrow 89), It may be arranged between the partition wall member 35 on the speed change pulley 5 side and the movable flange 15 (arrow 93).

【0025】図4はボルト95を皿ばね59のストッパ
にした例であり、皿ばね59は増速比がminになると
ボルト95の頭に突き当たる。この場合、ボルト95を
回転させることにより皿ばねの59の初期荷重を容易に
調整できる。又、第1ばねを装着した変速プーリを駆動
側にしてもよい。
FIG. 4 shows an example in which the bolt 95 is used as a stopper for the disc spring 59. The disc spring 59 hits the head of the bolt 95 when the speed increasing ratio becomes min. In this case, the initial load of the disc spring 59 can be easily adjusted by rotating the bolt 95. Further, the speed change pulley equipped with the first spring may be provided on the drive side.

【0026】[0026]

【発明の効果】この発明のベルト式無段変速機は、可動
フランジを押圧してベルトに張力を与えるばねに押圧力
の大きい第1ばねと押圧力の小さい第2ばねとを用いる
と共に、変速プーリのピッチ径が最大になると第1ばね
が突き当たるストッパを設けた。従って、変速操作用油
圧アクチュエータの駆動ポンプを停止しても可動フラン
ジが変速比の使用範囲外に移動せず駆動ポンプ起動時の
タイムラグが解消されると共に、負荷の軽減によりベル
トや変速プーリ用ベアリングなどの寿命が向上する。更
に、組付けに当って第1ばねの大きい押圧力がストッパ
で遮断されるから、組付け性が大幅に向上する。
The belt type continuously variable transmission of the present invention uses the first spring having a large pressing force and the second spring having a small pressing force as the spring for pressing the movable flange to give the tension to the belt, A stopper was provided so that the first spring abuts when the pulley pitch diameter becomes maximum. Therefore, even if the drive pump of the hydraulic actuator for gear shifting operation is stopped, the movable flange does not move out of the operating range of the gear ratio, eliminating the time lag when the drive pump is started, and reducing the load to reduce the load on the bearings for belts and gear pulleys. The life of the product is improved. Further, in assembling, the large pressing force of the first spring is blocked by the stopper, so that the assembling property is significantly improved.

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

【図1】一実施例の断面図である。FIG. 1 is a sectional view of an embodiment.

【図2】実施例の特性を示すグラフである。FIG. 2 is a graph showing characteristics of the example.

【図3】実施例の特性を示すグラフである。FIG. 3 is a graph showing characteristics of the example.

【図4】他のストッパを用いた他の実施例を示す断面図
である。
FIG. 4 is a sectional view showing another embodiment using another stopper.

【図5】従来例の断面図である。FIG. 5 is a cross-sectional view of a conventional example.

【符号の説明】[Explanation of symbols]

1 ベルト式無段変速機 3 ベルト 5,7 変速プーリ 9 油圧アクチュエータ 13,47 固定フランジ 15,49 可動フランジ 59 皿ばね(第1ばね) 61 コイルばね(第2ばね) 63 スナップリング(ストッパ) 95 ボルト(ストッパ) 1 Belt Type Continuously Variable Transmission 3 Belt 5,7 Speed Change Pulley 9 Hydraulic Actuator 13,47 Fixed Flange 15,49 Movable Flange 59 Disc Spring (First Spring) 61 Coil Spring (Second Spring) 63 Snap Ring (Stopper) 95 Bolt (stopper)

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 固定フランジと可動フランジ間に装着し
たベルトを介して連結されフランジ間隔変化に伴って変
速比を変える一対の変速プーリと、可動フランジを固定
フランジ側にそれぞれ大小の押圧力で押圧しベルトに張
力を与える第1ばね及び第2ばねと、ベルト張力に抗し
て可動フランジを移動操作し変速比を調節する油圧アク
チュエータと第1ばねを装着した変速プーリのプーリピ
ッチ径が最大になると第1ばねの押圧力を受けるストッ
パを備えたことを特徴とするベルト式無段変速機。
1. A pair of speed change pulleys which are connected via a belt mounted between a fixed flange and a movable flange and change a gear ratio in accordance with a change in flange spacing, and a movable flange is pressed to the fixed flange side by large and small pressing forces, respectively. If the first and second springs that apply tension to the belt, the hydraulic actuator that moves the movable flange against the belt tension to adjust the gear ratio, and the pulley pitch diameter of the speed change pulley equipped with the first spring are maximized. A belt type continuously variable transmission comprising a stopper that receives the pressing force of the first spring.
JP20325393A 1993-08-17 1993-08-17 Belt type continuously variable transmission Pending JPH0754945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20325393A JPH0754945A (en) 1993-08-17 1993-08-17 Belt type continuously variable transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20325393A JPH0754945A (en) 1993-08-17 1993-08-17 Belt type continuously variable transmission

Publications (1)

Publication Number Publication Date
JPH0754945A true JPH0754945A (en) 1995-02-28

Family

ID=16470970

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20325393A Pending JPH0754945A (en) 1993-08-17 1993-08-17 Belt type continuously variable transmission

Country Status (1)

Country Link
JP (1) JPH0754945A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016047293A1 (en) * 2014-09-24 2016-03-31 株式会社エクセディ Pulley device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016047293A1 (en) * 2014-09-24 2016-03-31 株式会社エクセディ Pulley device
JP2016065570A (en) * 2014-09-24 2016-04-28 株式会社エクセディ Pulley device

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