JPS6170261A - Transmission ratio detector for v-belt type stepless transmission - Google Patents
Transmission ratio detector for v-belt type stepless transmissionInfo
- Publication number
- JPS6170261A JPS6170261A JP19219084A JP19219084A JPS6170261A JP S6170261 A JPS6170261 A JP S6170261A JP 19219084 A JP19219084 A JP 19219084A JP 19219084 A JP19219084 A JP 19219084A JP S6170261 A JPS6170261 A JP S6170261A
- Authority
- JP
- Japan
- Prior art keywords
- detecting rod
- movable sheave
- shaft
- axial direction
- pulley
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/52—Pulleys or friction discs of adjustable construction
- F16H55/56—Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
【発明の詳細な説明】
発明の分野
本発明は自動車用変速機として経通なＶベルト式無段変
速機の変速比検出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gear ratio detection device for a V-belt continuously variable transmission commonly used as an automobile transmission.
従来技術とその問題点
従来、例えば特開昭５８−４２８６２号公報に記載のよ
うに、Ｖベルトを巻装した駆動側プーリおよび従動側プ
ーリの可シＪソーブの背後に油圧作υノ室を一体に設け
、この油圧作動室へｉｌ＋ｌ制圧弁から油圧を作用させ
ることにより、可動シーブを軸方向へ移動させ、変速比
を無段階に可変とした無段変速機が知られている。Conventional technology and its problems Conventionally, as described in Japanese Patent Application Laid-open No. 58-42862, a hydraulic pressure chamber is provided behind the movable J-sorb of a driving pulley and a driven pulley around which a V-belt is wound. A continuously variable transmission is known in which a movable sheave is moved in the axial direction by applying hydraulic pressure to this hydraulic chamber from an il+l pressure control valve, and the gear ratio is continuously variable.
上記従動側プーリに設けた油圧作動室の油圧は、変速比
と駆動軸の回転速度とにしたがって／Ｉｌ＋圧制御圧制
主弁制御され、■ベルトに適度なヘルド張力を付与する
よもになっているが、この変速比は駆動側プーリの可動
シーブの外周に（ｇ接Ｊ−る検出ロッドによって検出し
ている。The hydraulic pressure in the hydraulic chamber provided in the driven pulley is controlled by the /Il+pressure control pressure main valve according to the gear ratio and the rotational speed of the drive shaft, and is designed to apply appropriate heald tension to the belt. However, this speed ratio is detected by a detection rod located on the outer periphery of the movable sheave of the drive pulley.
ところが、上記のように検出ロッドを可シＪシーブの外
周に摺接させて変速比を検出する方法の場合には、可動
シーブの（ｇ接面の粗さや回転に伴う振れの影響で検出
ロッドが軸方向に変位し、高精度の検出ができない欠点
がある。また、検出ロットと可動シーブとが大きな周速
をもって１５１接するため、検出口、ドが摩耗して変速
比の検出に狂いが生じるという問題がある。However, in the case of the method of detecting the gear ratio by sliding the detection rod on the outer periphery of the movable sheave as described above, the detection rod may be damaged due to the roughness of the movable sheave's (G) contact surface and vibration due to rotation. Displaces in the axial direction, making it impossible to detect with high precision.Also, since the detection rod and the movable sheave come into contact with each other at a high circumferential speed, the detection port and do will wear out, causing errors in the detection of the gear ratio. There is a problem.
発明の目的
本発明はかかる従来の問題点に迄みてなされたもので、
その目的は、摺接面の粗さや振れの影響を受けず、かつ
摩耗の心配もなく、変速比を高精度に検出できるＶベル
ト式無段変速機の変速比検出装置を提供することにある
。Purpose of the Invention The present invention has been made in view of the problems of the conventional art.
The purpose is to provide a gear ratio detection device for a V-belt continuously variable transmission that can detect the gear ratio with high precision without being affected by the roughness or runout of sliding surfaces and without worrying about wear. .
発明の構成
上記目的を達成するために、本発明は、駆動側プーリあ
るいは従動側プーリの可動シーブと連動する検出ロッド
を、伝動軸の軸心に軸方向に摺動自在に設けたものであ
る。すなわち、検出ロッドを伝動軸の軸心に配置するこ
とにより、検出ロッドが振れの影響を受けず、かつ可動
シーブと一体回転する検出ロフトの周速を最小限とし得
るため、他部材との摺接摩耗を有効に防止できるのであ
る。Structure of the Invention In order to achieve the above object, the present invention provides a detection rod that is slidable in the axial direction at the axis of the transmission shaft, which interlocks with the movable sheave of the driving pulley or the driven pulley. . In other words, by arranging the detection rod at the axis of the transmission shaft, the detection rod is not affected by runout, and the circumferential speed of the detection loft, which rotates integrally with the movable sheave, can be minimized, which reduces the sliding contact with other parts. Contact wear can be effectively prevented.
実施例の説明
第１図は本発明にかかる無段変速機の一例を示し、この
無段変速機は駆動側プーリｌと従動側プーリ１０とこれ
らプーリ間に巻装された無端Ｖベルト５０とを備えてい
る。DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows an example of a continuously variable transmission according to the present invention. It is equipped with
駆動側プーリ１は駆動軸２に固定された固定シーブ３と
、駆動軸２に対し移動自在な可動シーブ４とを有してお
り、可動シーブ４を背後から作＋）＋手段５で押圧する
ことにより、プーリ径を可変としである。この作動手段
５としては、後記づ゛る油圧作動室を備えた油圧式プー
リ比制御手段や、回転に伴う遠心力により可動シーブ４
を軸方向に移動させる遠心作動手段や、駆動軸２の入力
トルクに見合ったシーブ推力を発生させるトルクカム手
段などがある。The drive pulley 1 has a fixed sheave 3 fixed to the drive shaft 2 and a movable sheave 4 movable relative to the drive shaft 2, and the movable sheave 4 is pressed from behind by means 5. This allows the pulley diameter to be varied. This actuating means 5 may include a hydraulic pulley ratio control means equipped with a hydraulic operating chamber as described later, or a movable sheave 4 using centrifugal force accompanying rotation.
There are centrifugal actuating means for moving the sheave in the axial direction, torque cam means for generating a sheave thrust commensurate with the input torque of the drive shaft 2, and the like.
従動側プーリ１０も駆動側プーリｌと同様に、従動軸１
１に固定された固定シーブ１２と、従動軸１１に対し軸
方向に移動自在な可動シーブ１３と、可動シーブ１３を
軸方向へ移動させる油圧式プーリ比制御手段１８とを有
している。Similarly to the driving pulley l, the driven pulley 10 also has a driven shaft 1.
1, a movable sheave 13 that is movable in the axial direction with respect to the driven shaft 11, and a hydraulic pulley ratio control means 18 that moves the movable sheave 13 in the axial direction.
従動側プーリ１０の構成を第２図に従って詳述すると、
固定シーブ１２は従動軸１１の端末部にスプライン係合
され、回り止めナフト１４にて結合されている。可動シ
ーブ１３のボス部１３ａ内周面には縦溝１５が形成され
、この縦溝１５と従動軸１１の外周面に設けた縦溝１６
との間に複数のボール１７を配置することによって、可
動シーブ１３は従動軸１１に対し軸方向にのみ移動自在
である。可動シーブ１３の背部には油圧式プーリ比制御
手段１８の一部を構成する油圧作動室１９が一体に設け
られている。この油圧作動室１９は、可動シーブ１３と
、従動軸１１に固定された固定ピストン２０と、２個の
環状ダイヤフラム２１．２２とで囲まれており、外部に
対し完全にシールされている。そして、この油圧作動室
１９内の油圧を従動軸１１に形成した油路２３を介して
図示しない油圧制御弁で制御することにより、可動シー
ブ１３を軸方向へ移動させ、駆動側と従動側とのプーリ
比（変速比）を無段階に変えることができる。第２図中
、従動軸１１を中心として上側半分は従動側プーリ１０
のプーリ１蚤が最小、下側半分はプーリ径が最大の状態
を示す。The configuration of the driven pulley 10 will be explained in detail according to FIG.
The stationary sheave 12 is spline-engaged with the end of the driven shaft 11 and connected by a rotation preventing napft 14 . A vertical groove 15 is formed on the inner peripheral surface of the boss portion 13a of the movable sheave 13, and a vertical groove 16 provided on the outer peripheral surface of the driven shaft 11 is formed in the vertical groove 15.
By disposing a plurality of balls 17 between the movable sheave 13 and the driven shaft 11, the movable sheave 13 is movable only in the axial direction. A hydraulic chamber 19 that constitutes a part of the hydraulic pulley ratio control means 18 is integrally provided at the back of the movable sheave 13 . This hydraulic chamber 19 is surrounded by a movable sheave 13, a fixed piston 20 fixed to the driven shaft 11, and two annular diaphragms 21, 22, and is completely sealed from the outside. By controlling the hydraulic pressure in this hydraulic chamber 19 through an oil passage 23 formed in the driven shaft 11 with a hydraulic control valve (not shown), the movable sheave 13 is moved in the axial direction, and the driving side and the driven side are separated. The pulley ratio (speed ratio) can be changed steplessly. In FIG. 2, the upper half of the driven shaft 11 is the driven pulley 10.
The diameter of pulley 1 is the smallest, and the lower half shows the largest pulley diameter.
なお、上記油圧作動室１９の油圧を制御する油圧式プー
リ比制御手段１８の具体的構成としては、例えば特開昭
５８−４２８６２号公報に記載のように、エンジン回転
数を検出するピトー管と、スロットル開度と連動するカ
ムと、ピトー管からの油圧信号とカムの変位信号とによ
ってプーリ比をｆｉ制御する油圧制御弁とで構成しても
よく、また他のいかなる油圧制御方法を用いてもよい。The specific structure of the hydraulic pulley ratio control means 18 for controlling the oil pressure in the hydraulic chamber 19 includes a pitot tube for detecting the engine rotation speed, as described in, for example, Japanese Patent Application Laid-Open No. 58-42862. , a cam that interlocks with the throttle opening, and a hydraulic control valve that controls the pulley ratio fi using a hydraulic signal from a pitot tube and a displacement signal of the cam, or any other hydraulic control method may be used. Good too.
従動軸１１の軸心には保持パイプ２４が挿着されており
、この保持パイプ２４の中心に検出ロッド２５が摺動自
在に挿通されている。この検出ロッド２５の一端には直
交方向に係合軸２６が固定されており、この係合軸２６
は従動軸１１に直１蚤方向に形成した案内溝１１ａ内を
移動自在である。また係合軸２６の先端は上記可動シー
ブ１３の内周面に形成した凹部１３ｂに係合しており、
これにより、検出ロッド２５は可動シーブ１３と連動し
て軸方向に移ＶＪ可能である。検出ロッド２５の他端に
はレバー２７の一端が当接しており、レバー２７の他端
は例えば特開昭５８−４２８６２号公報に記載のような
油圧制御弁のピストンと連係している。A holding pipe 24 is inserted into the axial center of the driven shaft 11, and a detection rod 25 is slidably inserted through the center of the holding pipe 24. An engagement shaft 26 is fixed to one end of the detection rod 25 in the orthogonal direction.
is movable within a guide groove 11a formed in the driven shaft 11 in a straight direction. Further, the tip of the engagement shaft 26 is engaged with a recess 13b formed on the inner peripheral surface of the movable sheave 13,
Thereby, the detection rod 25 can move in the axial direction in conjunction with the movable sheave 13. One end of a lever 27 is in contact with the other end of the detection rod 25, and the other end of the lever 27 is linked with a piston of a hydraulic control valve as described in, for example, Japanese Unexamined Patent Publication No. 58-42862.
上記構成において、駆動側および従動側の変速比が変化
すると、従動側プーリｌＯの可動シーブｌ３は軸方向に
移動し、検出ロッド２５も可動シーブ１３と同じ口だけ
軸方向に移動するため、検出ロッド２５の位置を検出す
ることによって変速比を検出できる。また、検出ロッド
２５は従動軸１１の軸心に配置されているため、従来の
ような摺接面の粗さや振れの影響を全く受けず、しかも
可動シーブ１３と一体回転している検出ロッド２５とレ
バー２７とはセンタ当たりのため、周速度がほぼ零であ
り、検出ロッド２５の摩耗の心配もない、したがって、
極めて高精度な変速比検出が可能となる。In the above configuration, when the speed ratio on the drive side and the driven side changes, the movable sheave l3 of the driven side pulley lO moves in the axial direction, and the detection rod 25 also moves in the axial direction by the same distance as the movable sheave 13, so that detection is possible. By detecting the position of the rod 25, the gear ratio can be detected. Furthermore, since the detection rod 25 is arranged at the axis of the driven shaft 11, it is not affected by the roughness of the sliding surface or runout as in the conventional case, and moreover, the detection rod 25 rotates integrally with the movable sheave 13. Since the lever 27 and the lever 27 are in contact with the center, the circumferential speed is almost zero, and there is no need to worry about wear of the detection rod 25.
Extremely accurate gear ratio detection becomes possible.
なお、上記実施例では検出口、ド２５を従動軸１１の軸
心に配置した場合を示したが、駆動軸２の軸心に配置し
てもよい。また、検出ロッド２５の変位をレバー２７を
介して油圧制御弁に伝達するものに限らず、検出ロフト
２５の変位をセンサで電気的信号に変換し、この信号に
よりベルト張力などの制御を行うようにしてもよい。In the above embodiment, the detection port 25 is arranged at the axial center of the driven shaft 11, but it may be arranged at the axial center of the drive shaft 2. In addition, the displacement of the detection rod 25 is not limited to the one that transmits the displacement of the detection loft 25 to the hydraulic control valve via the lever 27, but the displacement of the detection loft 25 is converted into an electrical signal by a sensor, and the belt tension etc. are controlled using this signal. You can also do this.
発明の効果
以上の説明で明らかなように、本発明によれば検出口、
ドを伝動軸の軸心に配置したので、従来のような可動シ
ーブの１ｇ接面の１且さやＩ辰れの影響を全く受けず、
しかも検出ロットとレバー等他部材との摺接も、検出ロ
ッドの１′？１ｉｉ！度が微少であるので、摩耗を最小
限に食い止めることができる。Effects of the Invention As is clear from the above explanation, according to the present invention, the detection port,
Since it is placed at the axis of the transmission shaft, it is not affected by the 1g contact surface of the movable sheave like the conventional one or the I curve.
Moreover, the sliding contact between the detection rod and other members such as levers is also limited to 1' of the detection rod. 1ii! Since the degree of friction is minute, wear can be kept to a minimum.
したがって、検出精度に狂いがなくなり、高精度の変速
比検出が可能となる。Therefore, there is no deviation in detection accuracy, and highly accurate gear ratio detection becomes possible.
第１図は本発明にかかるＶヘルド民声段変速［曳の概略
図、第２図は従動側プーリの詳ｆＩＩＩ断面図である。
ｌ・・・駆動側プーリ、１０・・・従動側プーリ、１１
・・・従動軸、ｌｌａ・・・案内溝、１３・・・可動シ
ーブ、１３ｂ・・・凹部、１９・・油圧作動室、２５・
・・検出ロッド、２６・・・係合軸。FIG. 1 is a schematic diagram of the V-held folk stage gear shift according to the present invention, and FIG. 2 is a detailed fIII sectional view of the driven pulley. l... Drive side pulley, 10... Driven side pulley, 11
... Driven shaft, lla ... Guide groove, 13 ... Movable sheave, 13b ... Recess, 19 ... Hydraulic working chamber, 25 ...
...Detection rod, 26...Engagement shaft.
Claims (1)
シーブとを軸方向に相互に移動させることにより、変速
比を可変としたＶベルト式無段変速機において、駆動側
プーリあるいは従動側プーリの可動シーブと連動する検
出ロッドを、伝動軸の軸心に軸方向に摺動自在に設けた
ことを特徴とするＶベルト式無段変速機の変速比検出装
置。(1) In a V-belt continuously variable transmission in which the speed ratio is variable by moving the movable sheave of the drive pulley and the movable sheave of the driven pulley relative to each other in the axial direction, the drive pulley or the driven pulley A gear ratio detection device for a V-belt continuously variable transmission, characterized in that a detection rod that interlocks with a movable sheave is provided slidably in the axial direction on the axis of a transmission shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19219084A JPS6170261A (en) | 1984-09-13 | 1984-09-13 | Transmission ratio detector for v-belt type stepless transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19219084A JPS6170261A (en) | 1984-09-13 | 1984-09-13 | Transmission ratio detector for v-belt type stepless transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6170261A true JPS6170261A (en) | 1986-04-11 |
Family
ID=16287173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19219084A Pending JPS6170261A (en) | 1984-09-13 | 1984-09-13 | Transmission ratio detector for v-belt type stepless transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6170261A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1167827A1 (en) * | 2000-06-30 | 2002-01-02 | Van Doorne's Transmissie B.V. | Adjustable pulley for use in a continuously variable transmission and constant frequency generator wherein such is utilised |
| JP2014073836A (en) * | 2008-06-11 | 2014-04-24 | Robert Bosch Gmbh | Brake device for automobile having pressure accumulator and operation method for the same |
-
1984
- 1984-09-13 JP JP19219084A patent/JPS6170261A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1167827A1 (en) * | 2000-06-30 | 2002-01-02 | Van Doorne's Transmissie B.V. | Adjustable pulley for use in a continuously variable transmission and constant frequency generator wherein such is utilised |
| JP2014073836A (en) * | 2008-06-11 | 2014-04-24 | Robert Bosch Gmbh | Brake device for automobile having pressure accumulator and operation method for the same |
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